Import Tcl 8.6.12

Import Tcl 8.6.11
Import Tcl 8.6.10
2021-11-08 17:30:58 +00:00 · 2021-03-30 00:51:39 +01:00 · 2020-09-24 22:53:56 +01:00 · 2018-02-23 08:20:05 -08:00 · 2018-02-22 14:28:00 -05:00
1588 changed files with 652258 additions and 66004 deletions
--- a/.travis.yml
+++ b/.travis.yml
@@ -0,0 +1,385 @@
+language: c
+addons:
+  apt:
+    sources:
+      - ubuntu-toolchain-r-test
+    packages:
+      - binutils-mingw-w64-i686
+      - binutils-mingw-w64-x86-64
+      - gcc-mingw-w64
+      - gcc-mingw-w64-base
+      - gcc-mingw-w64-i686
+      - gcc-mingw-w64-x86-64
+      - gcc-multilib
+jobs:
+  include:
+# Testing on Linux GCC
+    - name: "Linux/GCC/Shared"
+      os: linux
+      dist: focal
+      compiler: gcc
+      env:
+        - BUILD_DIR=unix
+    - name: "Linux/GCC/Shared: UTF_MAX=4"
+      os: linux
+      dist: focal
+      compiler: gcc
+      env:
+        - BUILD_DIR=unix
+        - CFGOPT=CFLAGS=-DTCL_UTF_MAX=4
+    - name: "Linux/GCC/Shared: UTF_MAX=6"
+      os: linux
+      dist: focal
+      compiler: gcc
+      env:
+        - BUILD_DIR=unix
+        - CFGOPT=CFLAGS=-DTCL_UTF_MAX=6
+    - name: "Linux/GCC/Static"
+      os: linux
+      dist: focal
+      compiler: gcc
+      env:
+        - CFGOPT="--disable-shared"
+        - BUILD_DIR=unix
+    - name: "Linux/GCC/Debug"
+      os: linux
+      dist: focal
+      compiler: gcc
+      env:
+        - BUILD_DIR=unix
+        - CFGOPT="--enable-symbols"
+    - name: "Linux/GCC/Mem-Debug"
+      os: linux
+      dist: focal
+      compiler: gcc
+      env:
+        - BUILD_DIR=unix
+        - CFGOPT="--enable-symbols=mem"
+# Newer/Older versions of GCC
+    - name: "Linux/GCC 10/Shared"
+      os: linux
+      dist: focal
+      compiler: gcc-10
+      addons:
+        apt:
+          packages:
+            - g++-10
+      env:
+        - BUILD_DIR=unix
+    - name: "Linux/GCC 5/Shared"
+      os: linux
+      dist: bionic
+      compiler: gcc-5
+      addons:
+        apt:
+          packages:
+            - g++-5
+      env:
+        - BUILD_DIR=unix
+# Testing on Linux Clang
+    - name: "Linux/Clang/Shared"
+      os: linux
+      dist: focal
+      compiler: clang
+      env:
+        - BUILD_DIR=unix
+    - name: "Linux/Clang/Static"
+      os: linux
+      dist: focal
+      compiler: clang
+      env:
+        - CFGOPT="--disable-shared"
+        - BUILD_DIR=unix
+    - name: "Linux/Clang/Debug"
+      os: linux
+      dist: focal
+      compiler: clang
+      env:
+        - BUILD_DIR=unix
+        - CFGOPT="--enable-symbols"
+    - name: "Linux/Clang/Mem-Debug"
+      os: linux
+      dist: focal
+      compiler: clang
+      env:
+        - BUILD_DIR=unix
+        - CFGOPT="--enable-symbols=mem"
+# Testing on Mac, various styles
+    - name: "macOS/Xcode 12/Shared"
+      os: osx
+      osx_image: xcode12.2
+      env:
+        - BUILD_DIR=macosx
+      install: []
+      script: &mactest
+        - make all
+        # The styles=develop avoids some weird problems on OSX
+        - make test styles=develop
+    - name: "macOS/Xcode 12/Shared/Unix-like"
+      os: osx
+      osx_image: xcode12.2
+      env:
+        - BUILD_DIR=unix
+        - CFGOPT="--enable-dtrace"
+# Newer MacOS versions
+    - name: "macOS/Xcode 12/Universal Apps/Shared"
+      os: osx
+      osx_image: xcode12u
+      env:
+        - BUILD_DIR=macosx
+      install: []
+      script: *mactest
+# Older MacOS versions
+    - name: "macOS/Xcode 11/Shared"
+      os: osx
+      osx_image: xcode11.7
+      env:
+        - BUILD_DIR=macosx
+      install: []
+      script: *mactest
+    - name: "macOS/Xcode 10/Shared"
+      os: osx
+      osx_image: xcode10.3
+      env:
+        - BUILD_DIR=macosx
+      install: []
+      script: *mactest
+    - name: "macOS/Xcode 9/Shared"
+      os: osx
+      osx_image: xcode9.4
+      env:
+        - BUILD_DIR=macosx
+      install: []
+      script: *mactest
+    - name: "macOS/Xcode 8/Shared"
+      os: osx
+      osx_image: xcode8.3
+      env:
+        - BUILD_DIR=macosx
+      install: []
+      script: *mactest
+# Test with mingw-w64 cross-compile
+# Doesn't run tests because wine is only an imperfect Windows emulation
+    - name: "Linux-cross-Windows/GCC/Shared/no test"
+      os: linux
+      dist: focal
+      compiler: x86_64-w64-mingw32-gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--host=x86_64-w64-mingw32 --enable-64bit"
+      script: &crosstest
+        - make all tcltest
+        # Include a high visibility marker that tests are skipped outright
+        - >
+          echo "`tput setaf 3`SKIPPED TEST: CROSS COMPILING`tput sgr0`"
+# Test with mingw-w64 (32 bit) cross-compile
+# Doesn't run tests because wine is only an imperfect Windows emulation
+    - name: "Linux-cross-Windows-32/GCC/Shared/no test"
+      os: linux
+      dist: focal
+      compiler: i686-w64-mingw32-gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT=--host=i686-w64-mingw32
+      script: *crosstest
+# Test on Windows with MSVC native
+    - name: "Windows/MSVC/Shared"
+      os: windows
+      compiler: cl
+      env: &vcenv
+        - BUILD_DIR=win
+        - VCDIR="/C/Program Files (x86)/Microsoft Visual Studio/2017/BuildTools/VC/Auxiliary/Build"
+      before_install: &vcpreinst
+        - touch generic/tclStubInit.c generic/tclOOStubInit.c
+        - PATH="$PATH:$VCDIR"
+        - cd ${BUILD_DIR}
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake '-f' makefile.vc test
+    - name: "Windows/MSVC/Shared: UTF_MAX=4"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=utfmax' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=utfmax' '-f' makefile.vc test
+    - name: "Windows/MSVC/Static"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=static,msvcrt' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=static,msvcrt' '-f' makefile.vc test
+    - name: "Windows/MSVC/StaticPackage"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=static,staticpkg,msvcrt' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=static,staticpkg,msvcrt' '-f' makefile.vc test
+    - name: "Windows/MSVC/Debug"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=symbols' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=symbols' '-f' makefile.vc test
+    - name: "Windows/MSVC/Mem-Debug"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'STATS=memdbg' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'STATS=memdbg' '-f' makefile.vc test
+# Test on Windows with MSVC native (32-bit)
+    - name: "Windows/MSVC-x86/Shared"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake '-f' makefile.vc test
+    - name: "Windows/MSVC-x86/Shared: UTF_MAX=4"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'OPTS=utfmax' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'OPTS=utfmax' '-f' makefile.vc test
+    - name: "Windows/MSVC-x86/Static"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'OPTS=static,msvcrt' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'OPTS=static,msvcrt' '-f' makefile.vc test
+    - name: "Windows/MSVC-x86/Debug"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'OPTS=symbols' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'OPTS=symbols' '-f' makefile.vc test
+    - name: "Windows/MSVC-x86/Mem-Debug"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'STATS=memdbg' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'STATS=memdbg' '-f' makefile.vc test
+# Test on Windows with GCC native
+    - name: "Windows/GCC/Shared"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-64bit"
+      before_install: &makepreinst
+        - touch generic/tclStubInit.c generic/tclOOStubInit.c
+        - choco install -y make
+        - cd ${BUILD_DIR}
+    - name: "Windows/GCC/Shared: UTF_MAX=4"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-64bit CFLAGS=-DTCL_UTF_MAX=4"
+      before_install: *makepreinst
+    - name: "Windows/GCC/Static"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-64bit --disable-shared"
+      before_install: *makepreinst
+    - name: "Windows/GCC/Debug"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-64bit --enable-symbols"
+      before_install: *makepreinst
+    - name: "Windows/GCC/Mem-Debug"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-64bit --enable-symbols=mem"
+      before_install: *makepreinst
+# Test on Windows with GCC native (32-bit)
+    - name: "Windows/GCC-x86/Shared"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+      before_install: *makepreinst
+    - name: "Windows/GCC-x86/Shared: UTF_MAX=4"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="CFLAGS=-DTCL_UTF_MAX=4"
+      before_install: *makepreinst
+    - name: "Windows/GCC-x86/Static"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--disable-shared"
+      before_install: *makepreinst
+    - name: "Windows/GCC-x86/Debug"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-symbols"
+      before_install: *makepreinst
+    - name: "Windows/GCC-x86/Mem-Debug"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-symbols=mem"
+      before_install: *makepreinst
+# "make dist" only
+    - name: "Linux: make dist"
+      os: linux
+      dist: focal
+      compiler: gcc
+      env:
+        - BUILD_DIR=unix
+      script:
+        - make dist
+before_install:
+  - touch generic/tclStubInit.c generic/tclOOStubInit.c
+  - cd ${BUILD_DIR}
+install:
+  - mkdir "$HOME/install dir"
+  - ./configure ${CFGOPT} "--prefix=$HOME/install dir" || (cat config.log && exit 1)
+before_script:
+  - export ERROR_ON_FAILURES=1
+script:
+  - make all tcltest || echo "Something wrong, maybe a hickup, let's try again"
+  - make test
+  - make install
--- a/6
+++ b/6
@@ -1,6 +1,6 @@
 A NOTE ON THE CHANGELOG:
 Starting in early 2011, Tcl source code has been under the management of
-fossil, hosted at http://core.tcl.tk/tcl/ .  Fossil presents a "Timeline"
+fossil, hosted at https://core.tcl-lang.org/tcl/ .  Fossil presents a "Timeline"
 view of changes made that is superior in every way to a hand edited log file.
 Because of this, many Tcl developers are now out of the habit of maintaining
 this log file.  You may still find useful things in it, but the Timeline is
@@ -1847,7 +1847,7 @@ a better first place to look now.

 	* tools/uniClass.tcl:    [FRQ 3473670]: Various Unicode-related
 	* tools/uniParse.tcl:    speedups/robustness. Enhanced tools to be
-	* generic/tclUniData.c:  able to handle characters > 0xffff. Done in
+	* generic/tclUniData.c:  able to handle characters > 0xFFFF. Done in
 	* generic/tclUtf.c:      all branches in order to simplify merges for
 	* generic/regc_locale.c: new Unicode versions (such as 6.1)

@@ -8096,7 +8096,7 @@ a better first place to look now.
 2009-03-25  Jan Nijtmans  <nijtmans@users.sf.net>

 	* doc/tclsh.1:		 Bring doc and tools in line with
-	* tools/installData.tcl: http://wiki.tcl.tk/812
+	* tools/installData.tcl: https://wiki.tcl-lang.org/page/exec+magic
 	* tools/str2c
 	* tools/tcltk-man2html.tcl

--- a/ChangeLog.2000
+++ b/ChangeLog.2000
@@ -414,7 +414,7 @@
 	Tcl_IsChannelExisting, and Tcl_ClearChannelHandlers to conform to the
 	new stacked channel implementation. Their stub slots were also moved
 	to give preference to the new 8.3.2 stub functions. This will cause an
-	incompatability with 8.4a1 only.
+	incompatibility with 8.4a1 only.
 	(StopCopy): fixed a bug introduced by a partial fix in 8.3.2 that
 	didn't set nonBlocking correctly when resetting the flags for the
 	write side. [Bug: 6261]
@@ -1779,7 +1779,7 @@
 	* generic/tclCmdMZ.c: Fixed infinite loop bug with [regexp -all]
 	[Bug: 4981].

-	* tests/*.test: Changed all occurances of "namespace import
+	* tests/*.test: Changed all occurrences of "namespace import
 	::tcltest" to "namespace import -force ::tcltest" [Bug: 3948].

 2000-04-09  Brent Welch <welch@scriptics.com>
--- a/ChangeLog.2001
+++ b/ChangeLog.2001
@@ -351,7 +351,7 @@

 	* mac/tclMacFile.c: fixed bug in permission checking code

-	* mac/tclMacLoad.c: corrected utf8 handling, comparison of package
+	* mac/tclMacLoad.c: corrected utf-8 handling, comparison of package
 	names to code fragment names changed to only match on the length of
 	package name, this allows for fragment names with version numbers
 	appended.
@@ -3525,7 +3525,7 @@
 	* generic/tclVar.c (Tcl_UnsetObjCmd): Rewrote argument parser to avoid
 	a read off the end of the argument array that could occur when
 	executing something like [unset -nocomplain] was executed. Improved
-	the error message given when too few arguments are given (-nocomplain
+	the error message given when not enough arguments are given (-nocomplain
 	should obviously be *before* --, not after it) and also modified the
 	test suite to take account of that and the documentation to use the
 	same improvement. [Bug 405769]
--- a/ChangeLog.2002
+++ b/ChangeLog.2002
@@ -847,7 +847,7 @@
 	exit.

 	* tests/exec.test: marked exec-18.1 unixOnly until the Windows
-	incompatability (in the test, not the core) can be resolved.
+	incompatibility (in the test, not the core) can be resolved.

 	* tests/http.test (http-3.11): added close $fp that was causing an
 	error on Windows because the file was not closed before deleting.
@@ -1753,7 +1753,7 @@

 2002-07-05  Reinhard Max  <max@suse.de>

-	* generic/tclClock.c (FormatClock): Convert the format string to UTF8
+	* generic/tclClock.c (FormatClock): Convert the format string to utf-8
 	before calling TclpStrftime, so that non-ASCII characters don't get
 	mangled when the result string is being converted back.
 	* tests/clock.test: Added a test for that.
@@ -3642,7 +3642,7 @@
 	* compat/strtoll.c (strtoll):
 	* compat/strtoull.c (strtoull):
 	* unix/tclUnixPort.h:
-	* win/tclWinPort.h: Const-ing 64-bit compatability declarations. Note
+	* win/tclWinPort.h: Const-ing 64-bit compatibility declarations. Note
 	that the return pointer is non-const because it is entirely legal for
 	the functions to be called from somewhere that owns the string being
 	passed. Fixes problem reported by Larry Virden.
@@ -3779,7 +3779,7 @@

 	There are a lot of changes from this TIP, so please see
 	http://purl.org/tcl/tip/72.html for discussion of
-	backward-compatability issues, but the main ones modifications are in:
+	backward-compatibility issues, but the main ones modifications are in:

 	* generic/tcl.h: New types.
 	* generic/tcl.decls: New public functions.
--- a/ChangeLog.2003
+++ b/ChangeLog.2003
@@ -947,7 +947,7 @@
 	declarations match and will end up using the declarations in the
 	public code from now on because of #include ordering. Keeping the old
 	declarations in tclInt.decls; there's no need to gratuitously break
-	compatability for those extensions which are already clients of the
+	compatibility for those extensions which are already clients of the
 	namespace code.

 2003-08-23  Zoran Vasiljevic  <zoran@archiwrae.com>
@@ -1278,7 +1278,7 @@

 	* generic/tclVar.c (Tcl_ArrayObjCmd, TclArraySet): Made [array get]
 	and [array set] work with dictionaries, producing them and consuming
-	them. Note that for compatability reasons, you will never get a dict
+	them. Note that for compatibility reasons, you will never get a dict
 	from feeding a string literal to [array set] since that alters the
 	trace behaviour of "multi-key" sets. [Bug 759935]

--- a/ChangeLog.2004
+++ b/ChangeLog.2004
@@ -345,7 +345,7 @@
 	* library/clock.tcl: Corrected the regular expressions that match a
 	time zone to allow for time zones specified as +HH or -HH.
 	* tests/clock.test: Added regression test case for the above issue.
-	Thanks to Rolf Ade for reporting this issue [http://wiki.tcl.tk/13094]
+	Thanks to Rolf Ade for reporting this issue [https://wiki.tcl-lang.org/page/Parsing+ISO8601+dates+and+times]
 	* win/tclWinDde.c (Tcl_DdeObjCmd): Corrected a typo that caused a
 	compilation failure on VC++.

@@ -1356,7 +1356,7 @@
 2004-10-07  Donal K. Fellows  <donal.k.fellows@man.ac.uk>

 	* *.3: Convert CONST to const and VOID to void so we document how
-	people should actually use the Tcl API and not the compatability hacks
+	people should actually use the Tcl API and not the compatibility hacks
 	that it has to have.

 	* doc/man.macros, *.3: Update .AS macro so it can know how wide to
@@ -2302,7 +2302,7 @@
 	934511].

 	* doc/CrtCommand.3: Added note that the arguments given to the command
-	proc of a Tcl_CreateCommand are in utf8 since Tcl 8.1. Closing [Patch
+	proc of a Tcl_CreateCommand are in utf-8 since Tcl 8.1. Closing [Patch
 	414778].

 	* doc/ChnlStack.3: Removed the declaration that the interp argument to
@@ -2873,7 +2873,7 @@
 2004-06-02  Jeff Hobbs	<jeffh@ActiveState.com>

 	* win/tclWinFile.c (TclpFindExecutable): when using GetModuleFileNameA
-	(Win9x), convert from CP_ACP to WCHAR then convert back to utf8.
+	(Win9x), convert from CP_ACP to WCHAR then convert back to utf-8.
 	Adjunct to 2004-04-07 fix.

 2004-06-02  David Gravereaux <davygrvy@pobox.com>
--- a/ChangeLog.2005
+++ b/ChangeLog.2005
@@ -2913,7 +2913,7 @@
 	* generic/tclCompCmds.c:	Updated callers to call new routine.
 	* generic/tclDictObj.c:	Updated callers to call new routine.
 	* tests/obj.test:	Corrected bad tests that actually expected
-	values like "47" and "0xac" to be accepted as booleans.
+	values like "47" and "0xAC" to be accepted as booleans.

 	* generic/tclLiteral.c: Disabled the code that forces some literals
 	into the "int" Tcl_ObjType during registration. We can re-enable it if
--- a/ChangeLog.2007
+++ b/ChangeLog.2007
@@ -5262,7 +5262,7 @@
 	* generic/tclStrToD.c: Added code to support the "middle endian"
 	floating point format used in the Nokia N770's software-based floating
 	point. Thanks to Bruce Johnson for reporting this bug, originally on
-	http://wiki.tcl.tk/15408.
+	https://wiki.tcl-lang.org/page/Nokia+770.
 	* library/clock.tcl: Fixed a bug with Daylight Saving Time and Posix
 	time zone specifiers reported by Martin Lemburg in
 	http://groups.google.com/group/comp.lang.tcl/browse_thread/thread/9a8b15a4dfc0b7a0
--- a/185
+++ b/185
@@ -1,185 +0,0 @@
-README:  Tcl
-    This is the Tcl 8.6.6 source distribution.
-	http://sourceforge.net/projects/tcl/files/Tcl/
-    You can get any source release of Tcl from the URL above.
-
-Contents
--------
-    1. Introduction
-    2. Documentation
-    3. Compiling and installing Tcl
-    4. Development tools
-    5. Tcl newsgroup
-    6. The Tcler's Wiki
-    7. Mailing lists
-    8. Support and Training
-    9. Tracking Development
-    10. Thank You
-
-1. Introduction
---------------
-Tcl provides a powerful platform for creating integration applications that
-tie together diverse applications, protocols, devices, and frameworks.
-When paired with the Tk toolkit, Tcl provides the fastest and most powerful
-way to create GUI applications that run on PCs, Unix, and Mac OS X.
-Tcl can also be used for a variety of web-related tasks and for creating
-powerful command languages for applications.
-
-Tcl is maintained, enhanced, and distributed freely by the Tcl community.
-Source code development and tracking of bug reports and feature requests
-takes place at:
-
-	http://core.tcl.tk/
-
-Tcl/Tk release and mailing list services are hosted by SourceForge:
-
-	http://sourceforge.net/projects/tcl/
-
-with the Tcl Developer Xchange hosted at:
-
-	http://www.tcl.tk/
-
-Tcl is a freely available open source package.  You can do virtually
-anything you like with it, such as modifying it, redistributing it,
-and selling it either in whole or in part.  See the file
-"license.terms" for complete information.
-
-2. Documentation
----------------
-
-Extensive documentation is available at our website.
-The home page for this release, including new features, is
-	http://www.tcl.tk/software/tcltk/8.6.html
-
-Detailed release notes can be found at the file distributions page
-by clicking on the relevant version.
-	http://sourceforge.net/projects/tcl/files/Tcl/
-
-Information about Tcl itself can be found at
-	http://www.tcl.tk/about/
-
-There have been many Tcl books on the market.  Many are mentioned in the Wiki:
-	http://wiki.tcl.tk/_/ref?N=25206
-
-To view the complete set of reference manual entries for Tcl 8.6 online,
-visit the URL:
-	http://www.tcl.tk/man/tcl8.6/
-
-2a. Unix Documentation
----------------------
-
-The "doc" subdirectory in this release contains a complete set of
-reference manual entries for Tcl.  Files with extension ".1" are for
-programs (for example, tclsh.1); files with extension ".3" are for C
-library procedures; and files with extension ".n" describe Tcl
-commands.  The file "doc/Tcl.n" gives a quick summary of the Tcl
-language syntax.  To print any of the man pages on Unix, cd to the
-"doc" directory and invoke your favorite variant of troff using the
-normal -man macros, for example
-
-		ditroff -man Tcl.n
-
-to print Tcl.n.  If Tcl has been installed correctly and your "man" program
-supports it, you should be able to access the Tcl manual entries using the
-normal "man" mechanisms, such as
-
-		man Tcl
-
-2b. Windows Documentation
-------------------------
-
-The "doc" subdirectory in this release contains a complete set of Windows
-help files for Tcl.  Once you install this Tcl release, a shortcut to the
-Windows help Tcl documentation will appear in the "Start" menu:
-
-	Start | Programs | Tcl | Tcl Help
-
-3. Compiling and installing Tcl
-------------------------------
-
-There are brief notes in the unix/README, win/README, and macosx/README about
-compiling on these different platforms.  There is additional information
-about building Tcl from sources at
-
-	http://www.tcl.tk/doc/howto/compile.html
-
-4. Development tools
---------------------------
-
-ActiveState produces a high quality set of commercial quality development
-tools that is available to accelerate your Tcl application development.
-Tcl Dev Kit builds on the earlier TclPro toolset and provides a debugger,
-static code checker, single-file wrapping utility, bytecode compiler and
-more.  More information can be found at
-
-	http://www.ActiveState.com/Tcl
-
-5. Tcl newsgroup
----------------
-
-There is a USENET news group, "comp.lang.tcl", intended for the exchange of
-information about Tcl, Tk, and related applications.  The newsgroup is a
-great place to ask general information questions.  For bug reports, please
-see the "Support and bug fixes" section below.
-
-6. Tcl'ers Wiki
---------------
-
-A Wiki-based open community site covering all aspects of Tcl/Tk is at:
-
-	http://wiki.tcl.tk/
-
-It is dedicated to the Tcl programming language and its extensions.  A
-wealth of useful information can be found there.  It contains code
-snippets, references to papers, books, and FAQs, as well as pointers to
-development tools, extensions, and applications.  You can also recommend
-additional URLs by editing the wiki yourself.
-
-7. Mailing lists
----------------
-
-Several mailing lists are hosted at SourceForge to discuss development or
-use issues (like Macintosh and Windows topics).  For more information and
-to subscribe, visit:
-
-	http://sourceforge.net/projects/tcl/
-
-and go to the Mailing Lists page.
-
-8. Support and Training
------------------------
-
-We are very interested in receiving bug reports, patches, and suggestions
-for improvements.  We prefer that you send this information to us as
-tickets entered into our tracker at:
-
-	http://core.tcl.tk/tcl/reportlist
-
-We will log and follow-up on each bug, although we cannot promise a
-specific turn-around time.  Enhancements may take longer and may not happen
-at all unless there is widespread support for them (we're trying to
-slow the rate at which Tcl/Tk turns into a kitchen sink).  It's very
-difficult to make incompatible changes to Tcl/Tk at this point, due to
-the size of the installed base.
-
-The Tcl community is too large for us to provide much individual support
-for users.  If you need help we suggest that you post questions to
-comp.lang.tcl.  We read the newsgroup and will attempt to answer esoteric
-questions for which no one else is likely to know the answer.  In addition,
-see the following Web site for links to other organizations that offer
-Tcl/Tk training:
-
-	http://wiki.tcl.tk/training
-
-9. Tracking Development
-----------------------
-
-Tcl is developed in public.  To keep an eye on how Tcl is changing, see
-	http://core.tcl.tk/
-
-10. Thank You
-------------
-
-We'd like to express our thanks to the Tcl community for all the
-helpful suggestions, bug reports, and patches we have received.
-Tcl/Tk has improved vastly and will continue to do so with your help.
--- a/README.md
+++ b/README.md
@@ -1,2 +1,150 @@
-# cpython-source-deps
-Source for packages that the cpython build process depends on
+# README:  Tcl
+
+This is the **Tcl 8.6.12** source distribution.
+
+You can get any source release of Tcl from [our distribution
+site](https://sourceforge.net/projects/tcl/files/Tcl/).
+
+[![Build Status](https://github.com/tcltk/tcl/workflows/Linux/badge.svg?branch=core-8-6-branch)](https://github.com/tcltk/tcl/actions?query=workflow%3A%22Linux%22+branch%3Acore-8-6-branch)
+[![Build Status](https://github.com/tcltk/tcl/workflows/Windows/badge.svg?branch=core-8-6-branch)](https://github.com/tcltk/tcl/actions?query=workflow%3A%22Windows%22+branch%3Acore-8-6-branch)
+[![Build Status](https://github.com/tcltk/tcl/workflows/macOS/badge.svg?branch=core-8-6-branch)](https://github.com/tcltk/tcl/actions?query=workflow%3A%22macOS%22+branch%3Acore-8-6-branch)
+
+## Contents
+ 1. [Introduction](#intro)
+ 2. [Documentation](#doc)
+ 3. [Compiling and installing Tcl](#build)
+ 4. [Development tools](#devtools)
+ 5. [Tcl newsgroup](#complangtcl)
+ 6. [The Tcler's Wiki](#wiki)
+ 7. [Mailing lists](#email)
+ 8. [Support and Training](#support)
+ 9. [Tracking Development](#watch)
+ 10. [Thank You](#thanks)
+
+## <a id="intro">1.</a> Introduction
+Tcl provides a powerful platform for creating integration applications that
+tie together diverse applications, protocols, devices, and frameworks.
+When paired with the Tk toolkit, Tcl provides the fastest and most powerful
+way to create GUI applications that run on PCs, Unix, and Mac OS X.
+Tcl can also be used for a variety of web-related tasks and for creating
+powerful command languages for applications.
+
+Tcl is maintained, enhanced, and distributed freely by the Tcl community.
+Source code development and tracking of bug reports and feature requests
+take place at [core.tcl-lang.org](https://core.tcl-lang.org/).
+Tcl/Tk release and mailing list services are [hosted by
+SourceForge](https://sourceforge.net/projects/tcl/)
+with the Tcl Developer Xchange hosted at
+[www.tcl-lang.org](https://www.tcl-lang.org).
+
+Tcl is a freely available open-source package.  You can do virtually
+anything you like with it, such as modifying it, redistributing it,
+and selling it either in whole or in part.  See the file
+`license.terms` for complete information.
+
+## <a id="doc">2.</a> Documentation
+Extensive documentation is available on our website.
+The home page for this release, including new features, is
+[here](https://www.tcl-lang.org/software/tcltk/8.6.html).
+Detailed release notes can be found at the
+[file distributions page](https://sourceforge.net/projects/tcl/files/Tcl/)
+by clicking on the relevant version.
+
+Information about Tcl itself can be found at the [Developer
+Xchange](https://www.tcl-lang.org/about/).
+There have been many Tcl books on the market.  Many are mentioned in
+[the Wiki](https://wiki.tcl-lang.org/_/ref?N=25206).
+
+The complete set of reference manual entries for Tcl 8.6 is [online,
+here](https://www.tcl-lang.org/man/tcl8.6/).
+
+### <a id="doc.unix">2a.</a> Unix Documentation
+The `doc` subdirectory in this release contains a complete set of
+reference manual entries for Tcl.  Files with extension "`.1`" are for
+programs (for example, `tclsh.1`); files with extension "`.3`" are for C
+library procedures; and files with extension "`.n`" describe Tcl
+commands.  The file "`doc/Tcl.n`" gives a quick summary of the Tcl
+language syntax.  To print any of the man pages on Unix, cd to the
+"doc" directory and invoke your favorite variant of troff using the
+normal -man macros, for example
+
+		groff -man -Tpdf Tcl.n >output.pdf
+
+to print Tcl.n to PDF.  If Tcl has been installed correctly and your "man" program
+supports it, you should be able to access the Tcl manual entries using the
+normal "man" mechanisms, such as
+
+		man Tcl
+
+### <a id="doc.win">2b.</a> Windows Documentation
+The "doc" subdirectory in this release contains a complete set of Windows
+help files for Tcl.  Once you install this Tcl release, a shortcut to the
+Windows help Tcl documentation will appear in the "Start" menu:
+
+		Start | Programs | Tcl | Tcl Help
+
+## <a id="build">3.</a> Compiling and installing Tcl
+There are brief notes in the `unix/README`, `win/README`, and `macosx/README`
+about compiling on these different platforms.  There is additional information
+about building Tcl from sources
+[online](https://www.tcl-lang.org/doc/howto/compile.html).
+
+## <a id="devtools">4.</a> Development tools
+ActiveState produces a high-quality set of commercial quality development
+tools that is available to accelerate your Tcl application development.
+Tcl Dev Kit builds on the earlier TclPro toolset and provides a debugger,
+static code checker, single-file wrapping utility, bytecode compiler, and
+more.  More information can be found at
+
+	https://www.activestate.com/products/tcl/
+
+## <a id="complangtcl">5.</a> Tcl newsgroup
+There is a USENET newsgroup, "`comp.lang.tcl`", intended for the exchange of
+information about Tcl, Tk, and related applications.  The newsgroup is a
+great place to ask general information questions.  For bug reports, please
+see the "Support and bug fixes" section below.
+
+## <a id="wiki">6.</a> Tcl'ers Wiki
+There is a [wiki-based open community site](https://wiki.tcl-lang.org/)
+covering all aspects of Tcl/Tk.
+
+It is dedicated to the Tcl programming language and its extensions.  A
+wealth of useful information can be found there.  It contains code
+snippets, references to papers, books, and FAQs, as well as pointers to
+development tools, extensions, and applications.  You can also recommend
+additional URLs by editing the wiki yourself.
+
+## <a id="email">7.</a> Mailing lists
+Several mailing lists are hosted at SourceForge to discuss development or use
+issues (like Macintosh and Windows topics).  For more information and to
+subscribe, visit [here](https://sourceforge.net/projects/tcl/) and go to the
+Mailing Lists page.
+
+## <a id="support">8.</a> Support and Training
+We are very interested in receiving bug reports, patches, and suggestions for
+improvements.  We prefer that you send this information to us as tickets
+entered into [our issue tracker](https://core.tcl-lang.org/tcl/reportlist).
+
+We will log and follow-up on each bug, although we cannot promise a
+specific turn-around time.  Enhancements may take longer and may not happen
+at all unless there is widespread support for them (we're trying to
+slow the rate at which Tcl/Tk turns into a kitchen sink).  It's very
+difficult to make incompatible changes to Tcl/Tk at this point, due to
+the size of the installed base.
+
+The Tcl community is too large for us to provide much individual support for
+users.  If you need help we suggest that you post questions to `comp.lang.tcl`
+or ask a question on [Stack
+Overflow](https://stackoverflow.com/questions/tagged/tcl).  We read the
+newsgroup and will attempt to answer esoteric questions for which no one else
+is likely to know the answer.  In addition, see the wiki for [links to other
+organizations](https://wiki.tcl-lang.org/training) that offer Tcl/Tk training.
+
+## <a id="watch">9.</a> Tracking Development
+Tcl is developed in public.  You can keep an eye on how Tcl is changing at
+[core.tcl-lang.org](https://core.tcl-lang.org/).
+
+## <a id="thanks">10.</a> Thank You
+We'd like to express our thanks to the Tcl community for all the
+helpful suggestions, bug reports, and patches we have received.
+Tcl/Tk has improved vastly and will continue to do so with your help.
--- a/432
+++ b/432
@@ -2307,7 +2307,7 @@ to the standard channel, do not increment the refcount. The channel can
 be NULL if there is for example no standard input. (JL)

 9/6/96 (portability improvement) Changed parsing of backslash sequences
-like \n to translate directly to absolute values like 0xa instead of
+like \n to translate directly to absolute values like 0xA instead of
 letting the compiler do the translation.  This guarantees that the
 translation is done the same everywhere. (JO)

@@ -8303,7 +8303,7 @@ reported usage of large expressions (porter)

 Many optmizations, improvements, and tightened stack management in bytecode.

--- Released 8.6.1, September 20, 2013 --- http://core.tcl.tk/tcl/ for details
+--- Released 8.6.1, September 20, 2013 --- https://core.tcl-lang.org/tcl/ for details

 2013-09-27 (enhancement) improved ::env synchronization (fellows)

@@ -8451,7 +8451,7 @@ include ::oo::class (fellows)

 2014-08-25 (TIP 429) New command [string cat] (leitgeb,ferrieux)

--- Released 8.6.2, August 27, 2014 --- http://core.tcl.tk/tcl/ for details
+--- Released 8.6.2, August 27, 2014 --- https://core.tcl-lang.org/tcl/ for details

 2014-08-28 (bug)[b9e1a3] Correct Method Search Order (nadkarni,fellows)
 => TclOO 1.0.3
@@ -8491,7 +8491,7 @@ include ::oo::class (fellows)

 2014-11-06 (bug)[5adc35] Stop forcing EOF to be permanent (porter)

--- Released 8.6.3, November 12, 2014 --- http://core.tcl.tk/tcl/ for details
+--- Released 8.6.3, November 12, 2014 --- https://core.tcl-lang.org/tcl/ for details

 2014-11-21 (bug)[743338] Win: socket error encoding (ladayaroslav,nijtmans)

@@ -8527,7 +8527,7 @@ include ::oo::class (fellows)
 2015-03-10 (enhancement) Revise OS X notifier for better Cocoa (walzer)
        *** POTENTIAL INCOMPATIBILITY ***

--- Released 8.6.4, March 12, 2015 --- http://core.tcl.tk/tcl/ for details
+--- Released 8.6.4, March 12, 2015 --- https://core.tcl-lang.org/tcl/ for details

 2015-03-19 (bug)[e66e44] Win: Ctrl-C/Ctrl-Break in console not EOF (nadkarni)

@@ -8623,7 +8623,7 @@ improvements to regexp engine from Postgres (lane,porter,fellows,seltenreich)

 2016-02-22 (bug)[9b4702] [info exists env(missing)] kills trace (nijtmans)

--- Released 8.6.5, February 29, 2016 --- http://core.tcl.tk/tcl/ for details
+--- Released 8.6.5, February 29, 2016 --- https://core.tcl-lang.org/tcl/ for details

 2016-03-01 (bug)[803042] mem leak due to reference cycle (porter)

@@ -8697,4 +8697,422 @@ improvements to regexp engine from Postgres (lane,porter,fellows,seltenreich)

 2016-07-20 tzdata updated to Olson's tzdata2016f (venkat)

--- Released 8.6.6, July 27, 2016 --- http://core.tcl.tk/tcl/ for details
+--- Released 8.6.6, July 27, 2016 --- https://core.tcl-lang.org/tcl/ for details
+
+2016-09-07 (bug)[c09edf] Bad caching with  custom resolver (neumann,nijtmans)
+
+2016-09-07 (bug)[4dbdd9] Memleak in test var-8.3 (mr_calvin,porter)
+
+2016-10-03 (bug)[2bf561] Allow empty command as alias target (yorick,nijtmans)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2016-10-04 (bug)[4d5ae7] Crash in async connects host no address (gahr,fellows)
+
+2016-10-08 (bug)[838e99] treat application/xml as text (gahr,fellows)
+=> http 2.8.10
+
+2016-10-11 (bug)[3cc1d9] Thread finalization crash in zippy (neumann)
+
+2016-10-12 (bug)[be003d] Fix [scan 0x1 %b], [scan 0x1 %o] (porter)
+
+2016-10-14 (bug)[eb6b68] Fix stringComp-14.5 (porter)
+
+2016-10-30 (bug)[b26e38] Fix zlib-7.8 (fellows)
+
+2016-10-30 (bug)[1ae129] Fix memleak in [history] destruction (fellows)
+
+2016-11-04 (feature) Provisional Tcl 9 support in msgcat and tcltest (nijtmans)
+=> msgcat 1.6.1
+=> tcltest 2.4.1
+
+2016-11-04 (bug)[824752] Crash in Tcl_ListObjReplace() (gahr,porter)
+
+2016-11-11 (bug)[79614f] invalidate VFS mounts on sytem encoding change (yorick)
+
+2016-11-14 OSX: End panic() as legacy support macro; system conflicts (nijtmans)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2016-11-15 (bug) TclOO fix stops crash mixing Itcl and snit (fellows)
+
+2016-11-17 (update) Reconcile libtommath updates; purge unused files (nijtmans)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2017-01-09 (bug)[b87ad7] Repair drifts in timer clock (sebres)
+
+2017-01-17 (update) => zlib 1.2.11 (nijtmans)
+
+2017-01-31 (bug)[39f630] Revise Tcl_LinkVar to tolerate some prefixes (nijtmans)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2017-02-01 (bug)[d0f7ba] Improper NAN optimization. expr-22.1[01] (aspect)
+
+2017-02-26 (bug)[25842c] zlib stream finalization (aspect)
+
+2017-03-07 (deprecate) Remove unmaintained makefile.bc file (nijtmans)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2017-03-14 (enhancement) [clock] and [encoding] are now ensembles (kenny)
+
+2017-03-15 (enhancement) several [clock] subcommands bytecoded (kenny)
+
+2017-03-23 tzdata updated to Olson's tzdata2017b (jima)
+
+2017-03-29 (bug)[900cb0] Fix OO unexport introspection (napier)
+
+2017-04-12 (bug)[42202b] Nesting imbalance in coro injection (nadkarni,sebres)
+
+2017-04-18 (bug)[bc4322] http package support for safe interps (nash,nijtmans)
+
+2017-04-28 (bug)[f34cf8] [file join a //b] => /b (neumann,porter)
+
+2017-05-01 (bug)[8bd13f] Windows threads and pipes (sebres,nijtmans)
+
+2017-05-01 (bug)[f9fe90] [file join //a b] EIAS violation (aspect,porter)
+
+2017-05-04 (bug) Make test filesystem-1.52 pass on Windows (nijtmans)
+
+2017-05-05 (bug)[601522] [binary] field spec overflow -> segfault (porter)
+
+2017-05-08 (bug)[6ca52a] http memleak handling keep-alive (aspect,nijtmans)
+=> http 2.8.11
+
+2017-05-29 (bug)[a3fb33] crash in [lsort] on long lists (sebres)
+
+2017-06-05 (bug)[67aa9a] Tcl_UtfToUniChar() revised handling invalid UTF-8 (nijtmans)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2017-06-08 (bug)[2738427] Tcl_NumUtfChars() corner case utf-4.9 (nijtmans)
+
+2017-06-22 (update) Update Unicode data to 10.0 (nijtmans)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2017-06-22 (TIP 473) Let [oo::copy] specify target namespace (fellows)
+
+2017-06-26 (bug)[46f801] Repair autoloader fragility (porter)
+
+2017-07-06 (bug)[adb198] Plug memleak in TclJoinPath (sebres,porter)
+
+2017-07-17 (bug)[fb2208] Repeatable tclIndex generation (wiedemann,nijtmans)
+
+--- Released 8.6.7, August 9, 2017 --- https://core.tcl-lang.org/tcl/ for details
+
+2017-08-10 [array names -regexp] supports backrefs (goth)
+
+2017-08-10 Fix gcc build failures due to #pragma placement (cassoff,fellows)
+
+2017-08-29 (bug)[b50fb2] exec redir append stdout and stderr to file (coulter)
+
+2017-08-31 (bug)[2a9465] http state 100 continue handling broken (oehlmann)
+=> http 2.8.12
+
+2017-09-02 (bug)[0e4d88] replace command, delete trace kills namespace (porter)
+
+2017-10-19 (bug)[1a5655] [info * methods] includes mixins (fellows)
+
+2017-10-23 tzdata updated to Olson's tzdata2017c (jima)
+
+2017-10-24 (bug)[fc1409] segfault in method cloning, oo-15.15 (coulter,fellows)
+
+2017-11-03 (bug)[6f2f83] More robust [load] for ReactOS (werner)
+
+2017-11-08 (bug)[3298012] Stop crash when hash tables overflow 32 bits (porter)
+
+2017-11-14 (bug)[5d6de6] Close failing case of [package prefer stable] (kupries)
+
+2017-11-17 (bug)[fab924] Fix misleading [load] message on Windows (oehlmann)
+
+2017-12-05 (bug)[4f6a1e] Crash when ensemble map and list are same (sebres)
+
+2017-12-06 (bug)[ce3a21] file normalize failure when tail is empty (porter)
+
+2017-12-08 (new)[TIP 477] nmake build system reform (nadkarni)
+
+2017-12-19 (bug)[586e71] EvalObjv exception handling at level #0 (sebres,porter)
+
+--- Released 8.6.8, December 22, 2017 --- https://core.tcl-lang.org/tcl/ for details
+
+2018-02-11 (enhance) stop blocking conversion of object to/from class (coulter)
+
+2018-02-12 (enhance) NR-enable [package require] (coulter)
+
+2018-02-14 (bug)[9fd5c6] crash in object deletion, test oo-11.5 (coulter)
+
+2018-02-14 (bug)[3c32a3] crash deleting object with class mixed in (coulter)
+
+2018-02-15 (platform) stop using -lieee, removed from glibc-2.27 (porter)
+***POTENTIAL INCOMPATIBILITY for math programs that embed Tcl***
+
+2018-02-23 (bug)[8e6a9a] bad binary [string match], test string-11.55 (porter)
+
+2018-03-05 (bug)[1873ea] repair multi-thread std channel init (sebres)
+
+2018-03-09 (bug)[db36fa] broken bytecode for index values (porter)
+
+2018-03-13 (bug) broken compiled [string replace], test string-14.19 (porter)
+
+2018-03-14 (bug) [string trim*] engine crashed on invalid UTF (sebres)
+
+2018-04-17 (bug) missing trace in compiled [array set], test var-20.11 (porter)
+
+2018-04-22 (bug)[46a241] crash in unset array with search, var-13.[23] (goth)
+
+2018-04-30 (bug)[27b682] race made [file delete] raise "no such file" (sebres)
+
+2018-06-04 (bug)[925643] 32/64 cleanup of filesystem DIR operations (sebres)
+
+2018-06-18 (bug) leaks in TclSetEnv and env cache (coulter)
+
+2018-06-24 (bug)[3592747] [yieldto] dying namespace, tailcall-14.1 (coulter)
+
+2018-07-09 (bug)[270f78] race in [file mkdir] (sebres)
+
+2018-07-12 (bug)[3f7af0] [file delete] raised "permission denied" (sebres)
+
+2018-07-26 (bug)[d051b7] overflow crash in [format] (sebres)
+
+2018-08-29 revised quoting of [exec] args in generated command line (sebres)
+***POTENTIAL INCOMPATIBILITY***
+
+2018-09-20 HTTP Keep-Alive with pipelined requests (nash)
+=> http 2.9.0
+
+2018-09-27 (new)[TIP 505] [lreplace] accepts all out of range indices (porter)
+
+2018-10-04 (bug) Prevent crash from NULL keyName (nijtmans)
+=> registry 1.3.3
+
+2018-10-26 (enhance) advance dde version (nijtmans)
+=> dde 1.4.1
+
+2018-10-27 tzdata updated to Olson's tzdata2018g (jima)
+
+2018-10-29 Update tcltest package for Travis support (fellows)
+=> tcltest 2.5.0
+
+2018-11-09 (bug)[35a8f1] overlong string length of some lists (owens)
+
+2018-11-16 (bug)[00d04c] Repair [binary encode base64] (sebres)
+
+- Released 8.6.9, November 16, 2018 - details at https://core.tcl-lang.org/tcl/ -
+
+2018-11-22 (bug)[7a9dc5] [file normalize ~/~foo] segfault (sebres)
+
+2018-12-30 (bug)[3cf3a9] variable 'timezone' deprecated in vc2017 (nijtmans)
+
+2019-01-09 (bug)[cc1e91] [list [list {*}[set a " "]]] regression (sebres)
+
+2019-02-01 (bug)[e3f481] tests var-1.2[01] (sebres)
+
+2019-03-01 (new) Update to Unicode 12.0 (nijtmans)
+
+2019-03-05 (new)[TIP 527] New command [timerate] (sebres)
+
+2019-03-08 (bug)[39fed4] [package require] memory validity (hume,porter)
+
+2019-04-23 (new) New command tcl::unsupported::corotype (fellows)
+
+2019-05-04 (bug) memlink when namespace deletion kills linked var (porter)
+
+2019-05-28 (new) README file converted to README.md in Markdown (nijtmans)
+
+2019-06-17 (bug)[8b9854] [info level 0] regression with ensembles (porter)
+
+2019-06-20 (bug)[6bdadf] crash multi-arg write-traced [lappend] (fellows,porter)
+
+2019-06-21 (bug)[f8a33c] crash Tcl_Exit before init (brooks,sebres)
+
+2019-08-27 (bug)[fa6bf3] Bytecode fails epoch recovery at numLevel=0 (sebres)
+
+2019-08-29 (bug)[fec0c1] C stack overflow compiling bytecode (ade,sebres)
+
+2019-09-12 tzdata updated to Olson's tzdata2019c (jima)
+
+2019-09-20 (new) registry/dde no longer need -DUNICODE (nijtmans)
+=> registry 1.3.4
+=> dde 1.4.2
+
+2019-10-02 (bug)[16768d] Fix [info hostname] on NetBSD (rytaro)
+
+2019-10-23 (new) libtommath updated to release 1.2.0 (nijtmans)
+
+2019-10-25 OSX: system Tcl deprecated. End default use of its packages. (walzer)
+
+2019-10-28 (bug)[bcd100] bad fs cache when system encoding changes (coulter)
+
+2019-11-15 (bug)[135804] segfault in [next] after destroy (coulter,sebres)
+
+2019-11-18 (bug)[13657a] application/json us text, not binary (noe,nijtmans)
+=> http 2.9.1
+
+- Released 8.6.10, Nov 21, 2019 - details at https://core.tcl-lang.org/tcl/ -
+
+2019-12-03 (bug)[3cd9be] Corner case in surrogate handling (nijtmans)
+
+2019-12-09 (new) Add tcltest::(Setup|Eval|Cleanup|)Test (coulter,sebres)
+=> tcltest 2.5.2
+
+2019-12-12 (new) Add 3 libtommath functions to stub table (nijtmans)
+
+2019-12-23 (bug)[ce3b9f] compilation errors with clang, windows msys2 (nijtmans)
+
+2019-12-27 (bug)[1de6b0] [expr 1e2147483648] => 0.0 (kbk)
+
+2020-01-04 (bug)[912886] tis-620 encoding fails to load (coulter)
+
+2020-01-13 (bug)[0b9332] Win: support system encoding init to utf-8 (jedlička)
+
+2020-01-17 (bug)[8cd2fe] [unload] corrupted list of loaded packages (berc)
+
+2020-01-17 (bug)[5d989f] segfault in lsort for large list length (sebres)
+
+2020-01-30 (bug) Reset WSAGetLastError()/errno in channel close (nijtmans)
+
+2020-02-17 (bug) Win: avoid create of legacy error-vars on init phase (sebres)
+
+2020-02-25 (bug) release refs when setting class's superclasses fails (dkf)
+
+2020-02-26 (bug) C++ compiler compatibility for registry and dde (nijtmans)
+=> registry 1.3.5
+=> dde 1.4.3
+
+2020-03-05 (new) Update to Unicode-13 (nijtmans)
+
+2020-03-16 (bug)[8f89e2] Win: env var encoding, env-2.5 (sebres, nijtmans)
+
+2020-03-27 (bug)[767e07] Tcl_Get(Range|UniChar) validate index inputs (nijtmans)
+
+2020-03-28 (bug)[8edfce] [binary encode base64] & multi-byte wrapchars (dgp)
+
+2020-03-28 (bug)[ffeb20] [binary decode base64] ignore invalid chars (dgp)
+See RFC 2045
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2020-03-31 (bug)[b8e82d] some -maxlen values break uuencode round trip (dgp)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2020-04-01 (bug)[f58371] Fileevent run in proper thread (bron,sebres)
+
+2020-04-13 (bug)[afa4b2] TclNeedSpace bug; tests util-8.5 .. util-8.11 (dgp)
+
+2020-04-13 (bug)[085913] Tcl_DStringAppendElement # quoting precision (dgp)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2020-04-13 (bug)[a7f685] test util-5.52 (dgp)
+
+2020-04-13 (bug)[c61818] Tcl_UtfPrev regression (dgp)
+
+2020-04-15 (bug)[8af92d] zlib transform issue, bad inflate (sebres)
+
+2020-04-16 (bug)[5e6346] Tcl_UtfPrev handling of overlong sequences (dgp)
+
+2020-04-27 (bug)[45ca23] [string tolower] inconsistency (dgp)
+
+2020-04-30 (bug)[da2352] init [info hostname] with DNS, not NetBIOS (nadkarni)
+
+2020-05-11 (bug)[d402ff] Win32 potential crash when using main() (werner)
+
+2020-05-13 (bug)[81242a] revised documentation for Tcl_UtfAtIndex() (nijtmans)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2020-05-13 (bug)[ed2980] Tcl_UtfToUniChar reads > TCL_UTF_MAX bytes (nijtmans)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2020-06-02 (bug) prevent segfault in parser (sebres)
+
+2020-06-21 (bug)[f81bec] http POST a binary file (alakendu,nash)
+=> http 2.9.2
+
+2020-06-23 (bug)[41c985] auto_path nonsense in Safe Base (nash)
+
+2020-06-24 (bug)[f70ce1] zlib multi-stream inflate acts only on first (sebres)
+
+2020-07-09 (bug)[a1bd37] [clock scan] new ISO format (clock-34.(19-24)) (sebres)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2020-07-10 (bug)[501974] [clock scan] +time zone (clock-34.(53-68)) (sebres)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2020-07-15 (bug)[3c6e47] compiled [lappend] performance, avoid copy (sebres)
+
+2020-07-16 (bug)[5bbd04] Fix index underflow (schwab)
+
+2020-07-27 (bug)[cb0373] http::geturl -keepalive fixes (nash)
+=> http 2.9.3
+
+2020-08-10 (bug)[29e884] cmd resolution cycle (namespace-57.0) (coulter,sebres)
+
+2020-08-12 (bug)[e87000] Tcl_BadChannelOption tolerate NULL (werner,nijtmans)
+
+2020-08-31 (TIP #581) disfavor Master/Slave terminology (nijtmans)
+=> opt 0.4.8
+
+2020-09-11 (bug)[3bc0f4] UBSan complains about body.chars[] usage (nijtmans)
+
+2020-09-17 (bug)[835c93] Support TIP 525 exit code for -singleproc 1 (nijtmans)
+=> tcltest 2.5.3
+
+2020-09-25 (new) force -eofchar \032 when evaluating library scripts (nijtmans)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2020-09-29 (bug)[0063cb] http::geturl -headers must be dict (oehlmann,nijtmans)
+
+2020-10-19 (bug)[cb4582] Update install-sh script (stu,nijtmans)
+
+2020-10-22 (bug)[c97593] Usage of gnu_printf in latest mingw-w64 (nijtmans)
+
+2020-10-26 (new)[48898a] improve error message consistency (stu)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2020-11-06 (new) revised case of module names (nijtmans)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2020-12-10 (bug)[ed5be7] Win: recognize "comx:" as serial port (oehlmann)
+
+2020-12-11 (new) support for msys2, Big Sur (nijtmans)
+=> platform 1.0.15
+
+2020-12-23 tzdata updated to Olson's tzdata2020e (jima)
+
+- Released 8.6.11, Dec 31, 2020 - details at https://core.tcl-lang.org/tcl/ -
+
+2021-02-02 (new) support for MacOS Big Sur updates (nijtmans)
+=> platform 1.0.17
+
+2021-02-15 (bug)[d43f96] [string trim*] broken for Emoji (werner)
+
+2021-02-16 (bug)[22324b] [string reverse] broken for Emoji (werner)
+
+2021-02-19 (bug)[1dab71,7c64aa] BRE broken by uninitialized value use (lane)
+
+2021-03-09 (bug)[8419c5] Unix tty channels tolerate EINTR (nijtmans)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2021-03-10 (bug)[4c591f] [string compare] EIAS violation (nijtmans)
+
+2021-04-08 (new) dde package installation compatible with Tcl 9 (nijtmans)
+=> dde 1.4.4
+
+2021-04-14 (bug)[266494] [concat foo [list #]] EIAS violation (porter)
+
+2021-05-03 (bug)[24b918] Save IO buffers from modern optimizers (rupprecht)
+
+2021-05-06 (new) support for POSIX error EILSEQ (nijtmans)
+
+2021-05-17 (bug)[688fcc] segfault during traced delete of alias (coulter)
+
+2021-06-22 (bug)[bad6cc] More secure build tool. CVE-2021-35331 (nijtmans)
+
+2021-07-17 (bug)[592a25] Win: segfault in Tcl_PutEnv() (danckaert,nijtmans)
+
+2021-09-02 (bug)[ccc448] segfault in ensemble rewrite machinery (coulter)
+
+2021-09-14 (new) Update to Unicode-14 (nijtmans)
+
+2021-10-08 (bug)[a8579d] failed proc argument spec processing (russell,coulter)
+
+2021-10-27 (new) support for MacOS Monterey (nijtmans)
+=> platform 1.0.18
+
+2021-10-27 tzdata updated to Olson's tzdata2021e (nijtmans)
+
+- Released 8.6.12, Nov 5, 2021 - details at https://core.tcl-lang.org/tcl/ -
--- a/compat/fake-rfc2553.c
+++ b/compat/fake-rfc2553.c
@@ -217,7 +217,7 @@ fake_getaddrinfo(const char *hostname, const char *servname,
 	}

 	if (!hostname) {
-		*res = malloc_ai(port, htonl(0x7f000001), hints);
+		*res = malloc_ai(port, htonl(0x7F000001), hints);
 		if (*res == NULL)
 			return (EAI_MEMORY);
 		return (0);
--- a/compat/fixstrtod.c
+++ b/compat/fixstrtod.c
@@ -1,36 +0,0 @@
-/*
- * fixstrtod.c --
- *
- *	Source code for the "fixstrtod" procedure.  This procedure is
- *	used in place of strtod under Solaris 2.4, in order to fix
- *	a bug where the "end" pointer gets set incorrectly.
- *
- * Copyright (c) 1995 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- */
-
-#include <stdio.h>
-
-#undef strtod
-
-/*
- * Declare strtod explicitly rather than including stdlib.h, since in
- * somes systems (e.g. SunOS 4.1.4) stdlib.h doesn't declare strtod.
- */
-
-extern double strtod(char *, char **);
-
-double
-fixstrtod(
-    char *string,
-    char **endPtr)
-{
-    double d;
-    d = strtod(string, endPtr);
-    if ((endPtr != NULL) && (*endPtr != string) && ((*endPtr)[-1] == 0)) {
-	*endPtr -= 1;
-    }
-    return d;
-}
--- a/compat/gettod.c
+++ b/compat/gettod.c
@@ -21,6 +21,7 @@ gettimeofday(
    struct timezone *tz)
 {
    struct timeb t;
+    (void)tz;

    ftime(&t);
    tp->tv_sec = t.time;
--- a/compat/mkstemp.c
+++ b/compat/mkstemp.c
@@ -36,7 +36,7 @@ mkstemp(
 {
    static const char alphanumerics[] =
 	"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
-    register char *a, *b;
+    char *a, *b;
    int fd, count, alphanumericsLen = strlen(alphanumerics); /* == 62 */

    a = template + strlen(template);
--- a/compat/opendir.c
+++ b/compat/opendir.c
@@ -20,9 +20,9 @@ DIR *
 opendir(
    char *name)
 {
-    register DIR *dirp;
-    register int fd;
-    char *myname;
+    DIR *dirp;
+    int fd;
+    const char *myname;

    myname = ((*name == '\0') ? "." : name);
    if ((fd = open(myname, 0, 0)) == -1) {
@@ -65,9 +65,9 @@ struct olddirect {

 struct dirent *
 readdir(
-    register DIR *dirp)
+    DIR *dirp)
 {
-    register struct olddirect *dp;
+    struct olddirect *dp;
    static struct dirent dir;

    for (;;) {
@@ -101,7 +101,7 @@ readdir(

 void
 closedir(
-    register DIR *dirp)
+    DIR *dirp)
 {
    close(dirp->dd_fd);
    dirp->dd_fd = -1;
--- a/compat/stdlib.h
+++ b/compat/stdlib.h
@@ -29,7 +29,6 @@ extern char *		malloc(unsigned int numBytes);
 extern void		qsort(void *base, int n, int size, int (*compar)(
 			    const void *element1, const void *element2));
 extern char *		realloc(char *ptr, unsigned int numBytes);
-extern double		strtod(const char *string, char **endPtr);
 extern long		strtol(const char *string, char **endPtr, int base);
 extern unsigned long	strtoul(const char *string, char **endPtr, int base);

--- a/compat/strstr.c
+++ b/compat/strstr.c
@@ -36,10 +36,10 @@

 char *
 strstr(
-    register char *string,	/* String to search. */
-    char *substring)		/* Substring to try to find in string. */
+    const char *string,		/* String to search. */
+    const char *substring)		/* Substring to try to find in string. */
 {
-    register char *a, *b;
+    const char *a, *b;

    /*
     * First scan quickly through the two strings looking for a
@@ -49,7 +49,7 @@ strstr(

    b = substring;
    if (*b == 0) {
-	return string;
+	return (char *)string;
    }
    for ( ; *string != 0; string += 1) {
 	if (*string != *b) {
@@ -58,7 +58,7 @@ strstr(
 	a = string;
 	while (1) {
 	    if (*b == 0) {
-		return string;
+		return (char *)string;
 	    }
 	    if (*a++ != *b++) {
 		break;
--- a/compat/strtod.c
+++ b/compat/strtod.c
@@ -1,252 +0,0 @@
-/*
- * strtod.c --
- *
- *	Source code for the "strtod" library procedure.
- *
- * Copyright (c) 1988-1993 The Regents of the University of California.
- * Copyright (c) 1994 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- */
-
-#include "tclInt.h"
-
-#ifndef TRUE
-#define TRUE 1
-#define FALSE 0
-#endif
-#ifndef NULL
-#define NULL 0
-#endif
-
-static const int maxExponent = 511;	/* Largest possible base 10 exponent.  Any
-				 * exponent larger than this will already
-				 * produce underflow or overflow, so there's
-				 * no need to worry about additional digits.
-				 */
-static const double powersOf10[] = {	/* Table giving binary powers of 10.  Entry */
-    10.,			/* is 10^2^i.  Used to convert decimal */
-    100.,			/* exponents into floating-point numbers. */
-    1.0e4,
-    1.0e8,
-    1.0e16,
-    1.0e32,
-    1.0e64,
-    1.0e128,
-    1.0e256
-};
-
-/*
- *----------------------------------------------------------------------
- *
- * strtod --
- *
- *	This procedure converts a floating-point number from an ASCII
- *	decimal representation to internal double-precision format.
- *
- * Results:
- *	The return value is the double-precision floating-point
- *	representation of the characters in string.  If endPtr isn't
- *	NULL, then *endPtr is filled in with the address of the
- *	next character after the last one that was part of the
- *	floating-point number.
- *
- * Side effects:
- *	None.
- *
- *----------------------------------------------------------------------
- */
-
-double
-strtod(
-    const char *string,		/* A decimal ASCII floating-point number,
-				 * optionally preceded by white space. Must
-				 * have form "-I.FE-X", where I is the integer
-				 * part of the mantissa, F is the fractional
-				 * part of the mantissa, and X is the
-				 * exponent. Either of the signs may be "+",
-				 * "-", or omitted. Either I or F may be
-				 * omitted, or both. The decimal point isn't
-				 * necessary unless F is present. The "E" may
-				 * actually be an "e". E and X may both be
-				 * omitted (but not just one). */
-    char **endPtr)		/* If non-NULL, store terminating character's
-				 * address here. */
-{
-    int sign, expSign = FALSE;
-    double fraction, dblExp;
-    const double *d;
-    register const char *p;
-    register int c;
-    int exp = 0;		/* Exponent read from "EX" field. */
-    int fracExp = 0;		/* Exponent that derives from the fractional
-				 * part. Under normal circumstatnces, it is
-				 * the negative of the number of digits in F.
-				 * However, if I is very long, the last digits
-				 * of I get dropped (otherwise a long I with a
-				 * large negative exponent could cause an
-				 * unnecessary overflow on I alone). In this
-				 * case, fracExp is incremented one for each
-				 * dropped digit. */
-    int mantSize;		/* Number of digits in mantissa. */
-    int decPt;			/* Number of mantissa digits BEFORE decimal
-				 * point. */
-    const char *pExp;		/* Temporarily holds location of exponent in
-				 * string. */
-
-    /*
-     * Strip off leading blanks and check for a sign.
-     */
-
-    p = string;
-    while (isspace(UCHAR(*p))) {
-	p += 1;
-    }
-    if (*p == '-') {
-	sign = TRUE;
-	p += 1;
-    } else {
-	if (*p == '+') {
-	    p += 1;
-	}
-	sign = FALSE;
-    }
-
-    /*
-     * Count the number of digits in the mantissa (including the decimal
-     * point), and also locate the decimal point.
-     */
-
-    decPt = -1;
-    for (mantSize = 0; ; mantSize += 1)
-    {
-	c = *p;
-	if (!isdigit(c)) {
-	    if ((c != '.') || (decPt >= 0)) {
-		break;
-	    }
-	    decPt = mantSize;
-	}
-	p += 1;
-    }
-
-    /*
-     * Now suck up the digits in the mantissa. Use two integers to collect 9
-     * digits each (this is faster than using floating-point). If the mantissa
-     * has more than 18 digits, ignore the extras, since they can't affect the
-     * value anyway.
-     */
-
-    pExp  = p;
-    p -= mantSize;
-    if (decPt < 0) {
-	decPt = mantSize;
-    } else {
-	mantSize -= 1;		/* One of the digits was the point. */
-    }
-    if (mantSize > 18) {
-	fracExp = decPt - 18;
-	mantSize = 18;
-    } else {
-	fracExp = decPt - mantSize;
-    }
-    if (mantSize == 0) {
-	fraction = 0.0;
-	p = string;
-	goto done;
-    } else {
-	int frac1, frac2;
-
-	frac1 = 0;
-	for ( ; mantSize > 9; mantSize -= 1) {
-	    c = *p;
-	    p += 1;
-	    if (c == '.') {
-		c = *p;
-		p += 1;
-	    }
-	    frac1 = 10*frac1 + (c - '0');
-	}
-	frac2 = 0;
-	for (; mantSize > 0; mantSize -= 1) {
-	    c = *p;
-	    p += 1;
-	    if (c == '.') {
-		c = *p;
-		p += 1;
-	    }
-	    frac2 = 10*frac2 + (c - '0');
-	}
-	fraction = (1.0e9 * frac1) + frac2;
-    }
-
-    /*
-     * Skim off the exponent.
-     */
-
-    p = pExp;
-    if ((*p == 'E') || (*p == 'e')) {
-	p += 1;
-	if (*p == '-') {
-	    expSign = TRUE;
-	    p += 1;
-	} else {
-	    if (*p == '+') {
-		p += 1;
-	    }
-	    expSign = FALSE;
-	}
-	if (!isdigit(UCHAR(*p))) {
-	    p = pExp;
-	    goto done;
-	}
-	while (isdigit(UCHAR(*p))) {
-	    exp = exp * 10 + (*p - '0');
-	    p += 1;
-	}
-    }
-    if (expSign) {
-	exp = fracExp - exp;
-    } else {
-	exp = fracExp + exp;
-    }
-
-    /*
-     * Generate a floating-point number that represents the exponent. Do this
-     * by processing the exponent one bit at a time to combine many powers of
-     * 2 of 10. Then combine the exponent with the fraction.
-     */
-
-    if (exp < 0) {
-	expSign = TRUE;
-	exp = -exp;
-    } else {
-	expSign = FALSE;
-    }
-    if (exp > maxExponent) {
-	exp = maxExponent;
-	errno = ERANGE;
-    }
-    dblExp = 1.0;
-    for (d = powersOf10; exp != 0; exp >>= 1, ++d) {
-	if (exp & 01) {
-	    dblExp *= *d;
-	}
-    }
-    if (expSign) {
-	fraction /= dblExp;
-    } else {
-	fraction *= dblExp;
-    }
-
-  done:
-    if (endPtr != NULL) {
-	*endPtr = (char *) p;
-    }
-
-    if (sign) {
-	return -fraction;
-    }
-    return fraction;
-}
--- a/compat/strtol.c
+++ b/compat/strtol.c
@@ -45,7 +45,7 @@ strtol(
 				 * hex, "0" means octal, anything else means
 				 * decimal. */
 {
-    register const char *p;
+    const char *p;
    long result;

    /*
--- a/compat/strtoul.c
+++ b/compat/strtoul.c
@@ -62,9 +62,9 @@ strtoul(
 				 * hex, "0" means octal, anything else means
 				 * decimal. */
 {
-    register const char *p;
-    register unsigned long int result = 0;
-    register unsigned digit;
+    const char *p;
+    unsigned long int result = 0;
+    unsigned digit;
    int anyDigits = 0;
    int negative=0;
    int overflow=0;
--- a/compat/waitpid.c
+++ b/compat/waitpid.c
@@ -70,7 +70,7 @@ waitpid(
    int options)		/* OR'ed combination of WNOHANG and
 				 * WUNTRACED. */
 {
-    register WaitInfo *waitPtr, *prevPtr;
+    WaitInfo *waitPtr, *prevPtr;
    pid_t result;
    WAIT_STATUS_TYPE status;

--- a/compat/zlib/CMakeLists.txt
+++ b/compat/zlib/CMakeLists.txt
@@ -3,7 +3,7 @@ set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS ON)

 project(zlib C)

-set(VERSION "1.2.8")
+set(VERSION "1.2.11")

 option(ASM686 "Enable building i686 assembly implementation")
 option(AMD64 "Enable building amd64 assembly implementation")
--- a/compat/zlib/ChangeLog
+++ b/compat/zlib/ChangeLog
@@ -1,10 +1,53 @@

                ChangeLog file for zlib

+Changes in 1.2.11 (15 Jan 2017)
+- Fix deflate stored bug when pulling last block from window
+- Permit immediate deflateParams changes before any deflate input
+
+Changes in 1.2.10 (2 Jan 2017)
+- Avoid warnings on snprintf() return value
+- Fix bug in deflate_stored() for zero-length input
+- Fix bug in gzwrite.c that produced corrupt gzip files
+- Remove files to be installed before copying them in Makefile.in
+- Add warnings when compiling with assembler code
+
+Changes in 1.2.9 (31 Dec 2016)
+- Fix contrib/minizip to permit unzipping with desktop API [Zouzou]
+- Improve contrib/blast to return unused bytes
+- Assure that gzoffset() is correct when appending
+- Improve compress() and uncompress() to support large lengths
+- Fix bug in test/example.c where error code not saved
+- Remedy Coverity warning [Randers-Pehrson]
+- Improve speed of gzprintf() in transparent mode
+- Fix inflateInit2() bug when windowBits is 16 or 32
+- Change DEBUG macro to ZLIB_DEBUG
+- Avoid uninitialized access by gzclose_w()
+- Allow building zlib outside of the source directory
+- Fix bug that accepted invalid zlib header when windowBits is zero
+- Fix gzseek() problem on MinGW due to buggy _lseeki64 there
+- Loop on write() calls in gzwrite.c in case of non-blocking I/O
+- Add --warn (-w) option to ./configure for more compiler warnings
+- Reject a window size of 256 bytes if not using the zlib wrapper
+- Fix bug when level 0 used with Z_HUFFMAN or Z_RLE
+- Add --debug (-d) option to ./configure to define ZLIB_DEBUG
+- Fix bugs in creating a very large gzip header
+- Add uncompress2() function, which returns the input size used
+- Assure that deflateParams() will not switch functions mid-block
+- Dramatically speed up deflation for level 0 (storing)
+- Add gzfread(), duplicating the interface of fread()
+- Add gzfwrite(), duplicating the interface of fwrite()
+- Add deflateGetDictionary() function
+- Use snprintf() for later versions of Microsoft C
+- Fix *Init macros to use z_ prefix when requested
+- Replace as400 with os400 for OS/400 support [Monnerat]
+- Add crc32_z() and adler32_z() functions with size_t lengths
+- Update Visual Studio project files [AraHaan]
+
 Changes in 1.2.8 (28 Apr 2013)
 - Update contrib/minizip/iowin32.c for Windows RT [Vollant]
 - Do not force Z_CONST for C++
- Clean up contrib/vstudio [Ro<EFBFBD>]
+- Clean up contrib/vstudio [Roß]
 - Correct spelling error in zlib.h
 - Fix mixed line endings in contrib/vstudio

@@ -34,7 +77,7 @@ Changes in 1.2.7.1 (24 Mar 2013)
 - Clean up the usage of z_const and respect const usage within zlib
 - Clean up examples/gzlog.[ch] comparisons of different types
 - Avoid shift equal to bits in type (caused endless loop)
- Fix unintialized value bug in gzputc() introduced by const patches
+- Fix uninitialized value bug in gzputc() introduced by const patches
 - Fix memory allocation error in examples/zran.c [Nor]
 - Fix bug where gzopen(), gzclose() would write an empty file
 - Fix bug in gzclose() when gzwrite() runs out of memory
@@ -194,7 +237,7 @@ Changes in 1.2.5.2 (17 Dec 2011)
 - Add a transparent write mode to gzopen() when 'T' is in the mode
 - Update python link in zlib man page
 - Get inffixed.h and MAKEFIXED result to match
- Add a ./config --solo option to make zlib subset with no libary use
+- Add a ./config --solo option to make zlib subset with no library use
 - Add undocumented inflateResetKeep() function for CAB file decoding
 - Add --cover option to ./configure for gcc coverage testing
 - Add #define ZLIB_CONST option to use const in the z_stream interface
@@ -564,7 +607,7 @@ Changes in 1.2.3.1 (16 August 2006)
 - Update make_vms.com [Zinser]
 - Use -fPIC for shared build in configure [Teredesai, Nicholson]
 - Use only major version number for libz.so on IRIX and OSF1 [Reinholdtsen]
- Use fdopen() (not _fdopen()) for Interix in zutil.h [B<EFBFBD>ck]
+- Use fdopen() (not _fdopen()) for Interix in zutil.h [Bäck]
 - Add some FAQ entries about the contrib directory
 - Update the MVS question in the FAQ
 - Avoid extraneous reads after EOF in gzio.c [Brown]
@@ -1178,7 +1221,7 @@ Changes in 1.0.6 (19 Jan 1998)
        386 asm code replacing longest_match().
   contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
        A C++ I/O streams interface to the zlib gz* functions
-   contrib/iostream2/  by Tyge L<EFBFBD>vset <Tyge.Lovset@cmr.no>
+   contrib/iostream2/  by Tyge Løvset <Tyge.Lovset@cmr.no>
        Another C++ I/O streams interface
   contrib/untgz/  by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
        A very simple tar.gz file extractor using zlib
@@ -1267,7 +1310,7 @@ Changes in 1.0.1 (20 May 96) [1.0 skipped to avoid confusion]
 - fix array overlay in deflate.c which sometimes caused bad compressed data
 - fix inflate bug with empty stored block
 - fix MSDOS medium model which was broken in 0.99
- fix deflateParams() which could generated bad compressed data.
+- fix deflateParams() which could generate bad compressed data.
 - Bytef is define'd instead of typedef'ed (work around Borland bug)
 - added an INDEX file
 - new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
--- a/compat/zlib/Makefile.in
+++ b/compat/zlib/Makefile.in
@@ -1,5 +1,5 @@
 # Makefile for zlib
-# Copyright (C) 1995-2013 Jean-loup Gailly, Mark Adler
+# Copyright (C) 1995-2017 Jean-loup Gailly, Mark Adler
 # For conditions of distribution and use, see copyright notice in zlib.h

 # To compile and test, type:
@@ -20,7 +20,7 @@ CC=cc

 CFLAGS=-O
 #CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
-#CFLAGS=-g -DDEBUG
+#CFLAGS=-g -DZLIB_DEBUG
 #CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
 #           -Wstrict-prototypes -Wmissing-prototypes

@@ -32,7 +32,7 @@ CPP=$(CC) -E

 STATICLIB=libz.a
 SHAREDLIB=libz.so
-SHAREDLIBV=libz.so.1.2.8
+SHAREDLIBV=libz.so.1.2.11
 SHAREDLIBM=libz.so.1
 LIBS=$(STATICLIB) $(SHAREDLIBV)

@@ -53,6 +53,9 @@ includedir = ${prefix}/include
 mandir = ${prefix}/share/man
 man3dir = ${mandir}/man3
 pkgconfigdir = ${libdir}/pkgconfig
+SRCDIR=
+ZINC=
+ZINCOUT=-I.

 OBJZ = adler32.o crc32.o deflate.o infback.o inffast.o inflate.o inftrees.o trees.o zutil.o
 OBJG = compress.o uncompr.o gzclose.o gzlib.o gzread.o gzwrite.o
@@ -113,8 +116,8 @@ test64: all64
 	fi; \
 	rm -f $$TMP64

-infcover.o: test/infcover.c zlib.h zconf.h
-	$(CC) $(CFLAGS) -I. -c -o $@ test/infcover.c
+infcover.o: $(SRCDIR)test/infcover.c $(SRCDIR)zlib.h zconf.h
+	$(CC) $(CFLAGS) $(ZINCOUT) -c -o $@ $(SRCDIR)test/infcover.c

 infcover: infcover.o libz.a
 	$(CC) $(CFLAGS) -o $@ infcover.o libz.a
@@ -140,24 +143,140 @@ match.lo: match.S
 	mv _match.o match.lo
 	rm -f _match.s

-example.o: test/example.c zlib.h zconf.h
-	$(CC) $(CFLAGS) -I. -c -o $@ test/example.c
+example.o: $(SRCDIR)test/example.c $(SRCDIR)zlib.h zconf.h
+	$(CC) $(CFLAGS) $(ZINCOUT) -c -o $@ $(SRCDIR)test/example.c

-minigzip.o: test/minigzip.c zlib.h zconf.h
-	$(CC) $(CFLAGS) -I. -c -o $@ test/minigzip.c
+minigzip.o: $(SRCDIR)test/minigzip.c $(SRCDIR)zlib.h zconf.h
+	$(CC) $(CFLAGS) $(ZINCOUT) -c -o $@ $(SRCDIR)test/minigzip.c

-example64.o: test/example.c zlib.h zconf.h
-	$(CC) $(CFLAGS) -I. -D_FILE_OFFSET_BITS=64 -c -o $@ test/example.c
+example64.o: $(SRCDIR)test/example.c $(SRCDIR)zlib.h zconf.h
+	$(CC) $(CFLAGS) $(ZINCOUT) -D_FILE_OFFSET_BITS=64 -c -o $@ $(SRCDIR)test/example.c

-minigzip64.o: test/minigzip.c zlib.h zconf.h
-	$(CC) $(CFLAGS) -I. -D_FILE_OFFSET_BITS=64 -c -o $@ test/minigzip.c
+minigzip64.o: $(SRCDIR)test/minigzip.c $(SRCDIR)zlib.h zconf.h
+	$(CC) $(CFLAGS) $(ZINCOUT) -D_FILE_OFFSET_BITS=64 -c -o $@ $(SRCDIR)test/minigzip.c

-.SUFFIXES: .lo

-.c.lo:
+adler32.o: $(SRCDIR)adler32.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)adler32.c
+
+crc32.o: $(SRCDIR)crc32.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)crc32.c
+
+deflate.o: $(SRCDIR)deflate.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)deflate.c
+
+infback.o: $(SRCDIR)infback.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)infback.c
+
+inffast.o: $(SRCDIR)inffast.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)inffast.c
+
+inflate.o: $(SRCDIR)inflate.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)inflate.c
+
+inftrees.o: $(SRCDIR)inftrees.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)inftrees.c
+
+trees.o: $(SRCDIR)trees.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)trees.c
+
+zutil.o: $(SRCDIR)zutil.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)zutil.c
+
+compress.o: $(SRCDIR)compress.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)compress.c
+
+uncompr.o: $(SRCDIR)uncompr.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)uncompr.c
+
+gzclose.o: $(SRCDIR)gzclose.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)gzclose.c
+
+gzlib.o: $(SRCDIR)gzlib.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)gzlib.c
+
+gzread.o: $(SRCDIR)gzread.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)gzread.c
+
+gzwrite.o: $(SRCDIR)gzwrite.c
+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)gzwrite.c
+
+
+adler32.lo: $(SRCDIR)adler32.c
 	-@mkdir objs 2>/dev/null || test -d objs
-	$(CC) $(SFLAGS) -DPIC -c -o objs/$*.o $<
-	-@mv objs/$*.o $@
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/adler32.o $(SRCDIR)adler32.c
+	-@mv objs/adler32.o $@
+
+crc32.lo: $(SRCDIR)crc32.c
+	-@mkdir objs 2>/dev/null || test -d objs
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/crc32.o $(SRCDIR)crc32.c
+	-@mv objs/crc32.o $@
+
+deflate.lo: $(SRCDIR)deflate.c
+	-@mkdir objs 2>/dev/null || test -d objs
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/deflate.o $(SRCDIR)deflate.c
+	-@mv objs/deflate.o $@
+
+infback.lo: $(SRCDIR)infback.c
+	-@mkdir objs 2>/dev/null || test -d objs
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/infback.o $(SRCDIR)infback.c
+	-@mv objs/infback.o $@
+
+inffast.lo: $(SRCDIR)inffast.c
+	-@mkdir objs 2>/dev/null || test -d objs
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/inffast.o $(SRCDIR)inffast.c
+	-@mv objs/inffast.o $@
+
+inflate.lo: $(SRCDIR)inflate.c
+	-@mkdir objs 2>/dev/null || test -d objs
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/inflate.o $(SRCDIR)inflate.c
+	-@mv objs/inflate.o $@
+
+inftrees.lo: $(SRCDIR)inftrees.c
+	-@mkdir objs 2>/dev/null || test -d objs
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/inftrees.o $(SRCDIR)inftrees.c
+	-@mv objs/inftrees.o $@
+
+trees.lo: $(SRCDIR)trees.c
+	-@mkdir objs 2>/dev/null || test -d objs
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/trees.o $(SRCDIR)trees.c
+	-@mv objs/trees.o $@
+
+zutil.lo: $(SRCDIR)zutil.c
+	-@mkdir objs 2>/dev/null || test -d objs
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/zutil.o $(SRCDIR)zutil.c
+	-@mv objs/zutil.o $@
+
+compress.lo: $(SRCDIR)compress.c
+	-@mkdir objs 2>/dev/null || test -d objs
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/compress.o $(SRCDIR)compress.c
+	-@mv objs/compress.o $@
+
+uncompr.lo: $(SRCDIR)uncompr.c
+	-@mkdir objs 2>/dev/null || test -d objs
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/uncompr.o $(SRCDIR)uncompr.c
+	-@mv objs/uncompr.o $@
+
+gzclose.lo: $(SRCDIR)gzclose.c
+	-@mkdir objs 2>/dev/null || test -d objs
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/gzclose.o $(SRCDIR)gzclose.c
+	-@mv objs/gzclose.o $@
+
+gzlib.lo: $(SRCDIR)gzlib.c
+	-@mkdir objs 2>/dev/null || test -d objs
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/gzlib.o $(SRCDIR)gzlib.c
+	-@mv objs/gzlib.o $@
+
+gzread.lo: $(SRCDIR)gzread.c
+	-@mkdir objs 2>/dev/null || test -d objs
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/gzread.o $(SRCDIR)gzread.c
+	-@mv objs/gzread.o $@
+
+gzwrite.lo: $(SRCDIR)gzwrite.c
+	-@mkdir objs 2>/dev/null || test -d objs
+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/gzwrite.o $(SRCDIR)gzwrite.c
+	-@mv objs/gzwrite.o $@
+

 placebo $(SHAREDLIBV): $(PIC_OBJS) libz.a
 	$(LDSHARED) $(SFLAGS) -o $@ $(PIC_OBJS) $(LDSHAREDLIBC) $(LDFLAGS)
@@ -190,10 +309,12 @@ install-libs: $(LIBS)
 	-@if [ ! -d $(DESTDIR)$(sharedlibdir) ]; then mkdir -p $(DESTDIR)$(sharedlibdir); fi
 	-@if [ ! -d $(DESTDIR)$(man3dir)      ]; then mkdir -p $(DESTDIR)$(man3dir); fi
 	-@if [ ! -d $(DESTDIR)$(pkgconfigdir) ]; then mkdir -p $(DESTDIR)$(pkgconfigdir); fi
+	rm -f $(DESTDIR)$(libdir)/$(STATICLIB)
 	cp $(STATICLIB) $(DESTDIR)$(libdir)
 	chmod 644 $(DESTDIR)$(libdir)/$(STATICLIB)
 	-@($(RANLIB) $(DESTDIR)$(libdir)/libz.a || true) >/dev/null 2>&1
 	-@if test -n "$(SHAREDLIBV)"; then \
+	  rm -f $(DESTDIR)$(sharedlibdir)/$(SHAREDLIBV); \
 	  cp $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir); \
 	  echo "cp $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir)"; \
 	  chmod 755 $(DESTDIR)$(sharedlibdir)/$(SHAREDLIBV); \
@@ -203,8 +324,10 @@ install-libs: $(LIBS)
 	  ln -s $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir)/$(SHAREDLIBM); \
 	  ($(LDCONFIG) || true)  >/dev/null 2>&1; \
 	fi
-	cp zlib.3 $(DESTDIR)$(man3dir)
+	rm -f $(DESTDIR)$(man3dir)/zlib.3
+	cp $(SRCDIR)zlib.3 $(DESTDIR)$(man3dir)
 	chmod 644 $(DESTDIR)$(man3dir)/zlib.3
+	rm -f $(DESTDIR)$(pkgconfigdir)/zlib.pc
 	cp zlib.pc $(DESTDIR)$(pkgconfigdir)
 	chmod 644 $(DESTDIR)$(pkgconfigdir)/zlib.pc
 # The ranlib in install is needed on NeXTSTEP which checks file times
@@ -212,7 +335,8 @@ install-libs: $(LIBS)

 install: install-libs
 	-@if [ ! -d $(DESTDIR)$(includedir)   ]; then mkdir -p $(DESTDIR)$(includedir); fi
-	cp zlib.h zconf.h $(DESTDIR)$(includedir)
+	rm -f $(DESTDIR)$(includedir)/zlib.h $(DESTDIR)$(includedir)/zconf.h
+	cp $(SRCDIR)zlib.h zconf.h $(DESTDIR)$(includedir)
 	chmod 644 $(DESTDIR)$(includedir)/zlib.h $(DESTDIR)$(includedir)/zconf.h

 uninstall:
@@ -226,18 +350,18 @@ uninstall:

 docs: zlib.3.pdf

-zlib.3.pdf: zlib.3
-	groff -mandoc -f H -T ps zlib.3 | ps2pdf - zlib.3.pdf
+zlib.3.pdf: $(SRCDIR)zlib.3
+	groff -mandoc -f H -T ps $(SRCDIR)zlib.3 | ps2pdf - $@

-zconf.h.cmakein: zconf.h.in
+zconf.h.cmakein: $(SRCDIR)zconf.h.in
 	-@ TEMPFILE=zconfh_$$; \
 	echo "/#define ZCONF_H/ a\\\\\n#cmakedefine Z_PREFIX\\\\\n#cmakedefine Z_HAVE_UNISTD_H\n" >> $$TEMPFILE &&\
-	sed -f $$TEMPFILE zconf.h.in > zconf.h.cmakein &&\
-	touch -r zconf.h.in zconf.h.cmakein &&\
+	sed -f $$TEMPFILE $(SRCDIR)zconf.h.in > $@ &&\
+	touch -r $(SRCDIR)zconf.h.in $@ &&\
 	rm $$TEMPFILE

-zconf: zconf.h.in
-	cp -p zconf.h.in zconf.h
+zconf: $(SRCDIR)zconf.h.in
+	cp -p $(SRCDIR)zconf.h.in zconf.h

 mostlyclean: clean
 clean:
@@ -255,34 +379,32 @@ maintainer-clean: distclean
 distclean: clean zconf zconf.h.cmakein docs
 	rm -f Makefile zlib.pc configure.log
 	-@rm -f .DS_Store
-	-@printf 'all:\n\t-@echo "Please use ./configure first.  Thank you."\n' > Makefile
-	-@printf '\ndistclean:\n\tmake -f Makefile.in distclean\n' >> Makefile
-	-@touch -r Makefile.in Makefile
+	@if [ -f Makefile.in ]; then \
+	printf 'all:\n\t-@echo "Please use ./configure first.  Thank you."\n' > Makefile ; \
+	printf '\ndistclean:\n\tmake -f Makefile.in distclean\n' >> Makefile ; \
+	touch -r $(SRCDIR)Makefile.in Makefile ; fi
+	@if [ ! -f zconf.h.in ]; then rm -f zconf.h zconf.h.cmakein ; fi
+	@if [ ! -f zlib.3 ]; then rm -f zlib.3.pdf ; fi

 tags:
-	etags *.[ch]
+	etags $(SRCDIR)*.[ch]

-depend:
-	makedepend -- $(CFLAGS) -- *.[ch]
+adler32.o zutil.o: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h
+gzclose.o gzlib.o gzread.o gzwrite.o: $(SRCDIR)zlib.h zconf.h $(SRCDIR)gzguts.h
+compress.o example.o minigzip.o uncompr.o: $(SRCDIR)zlib.h zconf.h
+crc32.o: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)crc32.h
+deflate.o: $(SRCDIR)deflate.h $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h
+infback.o inflate.o: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)inftrees.h $(SRCDIR)inflate.h $(SRCDIR)inffast.h $(SRCDIR)inffixed.h
+inffast.o: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)inftrees.h $(SRCDIR)inflate.h $(SRCDIR)inffast.h
+inftrees.o: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)inftrees.h
+trees.o: $(SRCDIR)deflate.h $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)trees.h

-# DO NOT DELETE THIS LINE -- make depend depends on it.
-
-adler32.o zutil.o: zutil.h zlib.h zconf.h
-gzclose.o gzlib.o gzread.o gzwrite.o: zlib.h zconf.h gzguts.h
-compress.o example.o minigzip.o uncompr.o: zlib.h zconf.h
-crc32.o: zutil.h zlib.h zconf.h crc32.h
-deflate.o: deflate.h zutil.h zlib.h zconf.h
-infback.o inflate.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h inffixed.h
-inffast.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
-inftrees.o: zutil.h zlib.h zconf.h inftrees.h
-trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
-
-adler32.lo zutil.lo: zutil.h zlib.h zconf.h
-gzclose.lo gzlib.lo gzread.lo gzwrite.lo: zlib.h zconf.h gzguts.h
-compress.lo example.lo minigzip.lo uncompr.lo: zlib.h zconf.h
-crc32.lo: zutil.h zlib.h zconf.h crc32.h
-deflate.lo: deflate.h zutil.h zlib.h zconf.h
-infback.lo inflate.lo: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h inffixed.h
-inffast.lo: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
-inftrees.lo: zutil.h zlib.h zconf.h inftrees.h
-trees.lo: deflate.h zutil.h zlib.h zconf.h trees.h
+adler32.lo zutil.lo: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h
+gzclose.lo gzlib.lo gzread.lo gzwrite.lo: $(SRCDIR)zlib.h zconf.h $(SRCDIR)gzguts.h
+compress.lo example.lo minigzip.lo uncompr.lo: $(SRCDIR)zlib.h zconf.h
+crc32.lo: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)crc32.h
+deflate.lo: $(SRCDIR)deflate.h $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h
+infback.lo inflate.lo: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)inftrees.h $(SRCDIR)inflate.h $(SRCDIR)inffast.h $(SRCDIR)inffixed.h
+inffast.lo: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)inftrees.h $(SRCDIR)inflate.h $(SRCDIR)inffast.h
+inftrees.lo: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)inftrees.h
+trees.lo: $(SRCDIR)deflate.h $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)trees.h
--- a/compat/zlib/README
+++ b/compat/zlib/README
@@ -1,6 +1,6 @@
 ZLIB DATA COMPRESSION LIBRARY

-zlib 1.2.8 is a general purpose data compression library.  All the code is
+zlib 1.2.11 is a general purpose data compression library.  All the code is
 thread safe.  The data format used by the zlib library is described by RFCs
 (Request for Comments) 1950 to 1952 in the files
 http://tools.ietf.org/html/rfc1950 (zlib format), rfc1951 (deflate format) and
@@ -31,7 +31,7 @@ Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan.  1997
 issue of Dr.  Dobb's Journal; a copy of the article is available at
 http://marknelson.us/1997/01/01/zlib-engine/ .

-The changes made in version 1.2.8 are documented in the file ChangeLog.
+The changes made in version 1.2.11 are documented in the file ChangeLog.

 Unsupported third party contributions are provided in directory contrib/ .

@@ -84,7 +84,7 @@ Acknowledgments:

 Copyright notice:

- (C) 1995-2013 Jean-loup Gailly and Mark Adler
+ (C) 1995-2017 Jean-loup Gailly and Mark Adler

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
--- a/compat/zlib/adler32.c
+++ b/compat/zlib/adler32.c
@@ -1,5 +1,5 @@
 /* adler32.c -- compute the Adler-32 checksum of a data stream
- * Copyright (C) 1995-2011 Mark Adler
+ * Copyright (C) 1995-2011, 2016 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -7,11 +7,9 @@

 #include "zutil.h"

-#define local static
-
 local uLong adler32_combine_ OF((uLong adler1, uLong adler2, z_off64_t len2));

-#define BASE 65521      /* largest prime smaller than 65536 */
+#define BASE 65521U     /* largest prime smaller than 65536 */
 #define NMAX 5552
 /* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */

@@ -62,10 +60,10 @@ local uLong adler32_combine_ OF((uLong adler1, uLong adler2, z_off64_t len2));
 #endif

 /* ========================================================================= */
-uLong ZEXPORT adler32(adler, buf, len)
+uLong ZEXPORT adler32_z(adler, buf, len)
    uLong adler;
    const Bytef *buf;
-    uInt len;
+    z_size_t len;
 {
    unsigned long sum2;
    unsigned n;
@@ -132,6 +130,15 @@ uLong ZEXPORT adler32(adler, buf, len)
    return adler | (sum2 << 16);
 }

+/* ========================================================================= */
+uLong ZEXPORT adler32(adler, buf, len)
+    uLong adler;
+    const Bytef *buf;
+    uInt len;
+{
+    return adler32_z(adler, buf, len);
+}
+
 /* ========================================================================= */
 local uLong adler32_combine_(adler1, adler2, len2)
    uLong adler1;
@@ -156,7 +163,7 @@ local uLong adler32_combine_(adler1, adler2, len2)
    sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem;
    if (sum1 >= BASE) sum1 -= BASE;
    if (sum1 >= BASE) sum1 -= BASE;
-    if (sum2 >= (BASE << 1)) sum2 -= (BASE << 1);
+    if (sum2 >= ((unsigned long)BASE << 1)) sum2 -= ((unsigned long)BASE << 1);
    if (sum2 >= BASE) sum2 -= BASE;
    return sum1 | (sum2 << 16);
 }
--- a/compat/zlib/as400/bndsrc
+++ b/compat/zlib/as400/bndsrc
@@ -1,215 +0,0 @@
-STRPGMEXP PGMLVL(*CURRENT) SIGNATURE('ZLIB')
-
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-/*   Version 1.1.3 entry points.                                    */
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-
-/********************************************************************/
-/*   *MODULE      ADLER32      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("adler32")
-
-/********************************************************************/
-/*   *MODULE      COMPRESS     ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("compress")
-  EXPORT SYMBOL("compress2")
-
-/********************************************************************/
-/*   *MODULE      CRC32        ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("crc32")
-  EXPORT SYMBOL("get_crc_table")
-
-/********************************************************************/
-/*   *MODULE      DEFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("deflate")
-  EXPORT SYMBOL("deflateEnd")
-  EXPORT SYMBOL("deflateSetDictionary")
-  EXPORT SYMBOL("deflateCopy")
-  EXPORT SYMBOL("deflateReset")
-  EXPORT SYMBOL("deflateParams")
-  EXPORT SYMBOL("deflatePrime")
-  EXPORT SYMBOL("deflateInit_")
-  EXPORT SYMBOL("deflateInit2_")
-
-/********************************************************************/
-/*   *MODULE      GZIO         ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("gzopen")
-  EXPORT SYMBOL("gzdopen")
-  EXPORT SYMBOL("gzsetparams")
-  EXPORT SYMBOL("gzread")
-  EXPORT SYMBOL("gzwrite")
-  EXPORT SYMBOL("gzprintf")
-  EXPORT SYMBOL("gzputs")
-  EXPORT SYMBOL("gzgets")
-  EXPORT SYMBOL("gzputc")
-  EXPORT SYMBOL("gzgetc")
-  EXPORT SYMBOL("gzflush")
-  EXPORT SYMBOL("gzseek")
-  EXPORT SYMBOL("gzrewind")
-  EXPORT SYMBOL("gztell")
-  EXPORT SYMBOL("gzeof")
-  EXPORT SYMBOL("gzclose")
-  EXPORT SYMBOL("gzerror")
-
-/********************************************************************/
-/*   *MODULE      INFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("inflate")
-  EXPORT SYMBOL("inflateEnd")
-  EXPORT SYMBOL("inflateSetDictionary")
-  EXPORT SYMBOL("inflateSync")
-  EXPORT SYMBOL("inflateReset")
-  EXPORT SYMBOL("inflateInit_")
-  EXPORT SYMBOL("inflateInit2_")
-  EXPORT SYMBOL("inflateSyncPoint")
-
-/********************************************************************/
-/*   *MODULE      UNCOMPR      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("uncompress")
-
-/********************************************************************/
-/*   *MODULE      ZUTIL        ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("zlibVersion")
-  EXPORT SYMBOL("zError")
-
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-/*   Version 1.2.1 additional entry points.                         */
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-
-/********************************************************************/
-/*   *MODULE      COMPRESS     ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("compressBound")
-
-/********************************************************************/
-/*   *MODULE      DEFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("deflateBound")
-
-/********************************************************************/
-/*   *MODULE      GZIO         ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("gzungetc")
-  EXPORT SYMBOL("gzclearerr")
-
-/********************************************************************/
-/*   *MODULE      INFBACK      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("inflateBack")
-  EXPORT SYMBOL("inflateBackEnd")
-  EXPORT SYMBOL("inflateBackInit_")
-
-/********************************************************************/
-/*   *MODULE      INFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("inflateCopy")
-
-/********************************************************************/
-/*   *MODULE      ZUTIL        ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("zlibCompileFlags")
-
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-/*   Version 1.2.5 additional entry points.                         */
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-
-/********************************************************************/
-/*   *MODULE      ADLER32      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("adler32_combine")
-  EXPORT SYMBOL("adler32_combine64")
-
-/********************************************************************/
-/*   *MODULE      CRC32        ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("crc32_combine")
-  EXPORT SYMBOL("crc32_combine64")
-
-/********************************************************************/
-/*   *MODULE      GZLIB        ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("gzbuffer")
-  EXPORT SYMBOL("gzoffset")
-  EXPORT SYMBOL("gzoffset64")
-  EXPORT SYMBOL("gzopen64")
-  EXPORT SYMBOL("gzseek64")
-  EXPORT SYMBOL("gztell64")
-
-/********************************************************************/
-/*   *MODULE      GZREAD       ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("gzclose_r")
-
-/********************************************************************/
-/*   *MODULE      GZWRITE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("gzclose_w")
-
-/********************************************************************/
-/*   *MODULE      INFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("inflateMark")
-  EXPORT SYMBOL("inflatePrime")
-  EXPORT SYMBOL("inflateReset2")
-  EXPORT SYMBOL("inflateUndermine")
-
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-/*   Version 1.2.6 additional entry points.                         */
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-
-/********************************************************************/
-/*   *MODULE      DEFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("deflateResetKeep")
-  EXPORT SYMBOL("deflatePending")
-
-/********************************************************************/
-/*   *MODULE      GZWRITE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("gzgetc_")
-
-/********************************************************************/
-/*   *MODULE      INFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("inflateResetKeep")
-
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-/*   Version 1.2.8 additional entry points.                         */
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-
-/********************************************************************/
-/*   *MODULE      INFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("inflateGetDictionary")
-
-ENDPGMEXP
--- a/compat/zlib/as400/compile.clp
+++ b/compat/zlib/as400/compile.clp
@@ -1,110 +0,0 @@
-/******************************************************************************/
-/*                                                                            */
-/*  ZLIB                                                                      */
-/*                                                                            */
-/*    Compile sources into modules and link them into a service program.      */
-/*                                                                            */
-/******************************************************************************/
-
-             PGM
-
-/*      Configuration adjustable parameters.                                  */
-
-             DCL        VAR(&SRCLIB) TYPE(*CHAR) LEN(10) +
-                          VALUE('ZLIB')                         /* Source library. */
-             DCL        VAR(&SRCFILE) TYPE(*CHAR) LEN(10) +
-                          VALUE('SOURCES')                      /* Source member file. */
-             DCL        VAR(&CTLFILE) TYPE(*CHAR) LEN(10) +
-                          VALUE('TOOLS')                        /* Control member file. */
-
-             DCL        VAR(&MODLIB) TYPE(*CHAR) LEN(10) +
-                          VALUE('ZLIB')                         /* Module library. */
-
-             DCL        VAR(&SRVLIB) TYPE(*CHAR) LEN(10) +
-                          VALUE('LGPL')                         /* Service program library. */
-
-             DCL        VAR(&CFLAGS) TYPE(*CHAR) +
-                          VALUE('OPTIMIZE(40)')                 /* Compile options. */
-
-             DCL        VAR(&TGTRLS) TYPE(*CHAR) +
-                          VALUE('V5R3M0')                       /* Target release. */
-
-
-/*      Working storage.                                                      */
-
-             DCL        VAR(&CMDLEN) TYPE(*DEC) LEN(15 5) VALUE(300)    /* Command length. */
-             DCL        VAR(&CMD) TYPE(*CHAR) LEN(512)
-             DCL        VAR(&FIXDCMD) TYPE(*CHAR) LEN(512)
-
-
-/*      Compile sources into modules.                                         */
-
-             CHGVAR     VAR(&FIXDCMD) VALUE('CRTCMOD' *BCAT &CFLAGS *BCAT      +
-                        'SYSIFCOPT(*IFS64IO)' *BCAT                            +
-                        'DEFINE(''_LARGEFILE64_SOURCE''' *BCAT                 +
-                        '''_LFS64_LARGEFILE=1'') TGTRLS(' *TCAT &TGTRLS *TCAT  +
-                        ') SRCFILE(' *TCAT &SRCLIB *TCAT '/' *TCAT             +
-                        &SRCFILE *TCAT ') MODULE(' *TCAT &MODLIB *TCAT '/')
-
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'ADLER32)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'COMPRESS)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'CRC32)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'DEFLATE)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'GZCLOSE)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'GZLIB)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'GZREAD)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'GZWRITE)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'INFBACK)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'INFFAST)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'INFLATE)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'INFTREES)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'TREES)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'UNCOMPR)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'ZUTIL)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-
-/*      Link modules into a service program.                                  */
-
-             CRTSRVPGM  SRVPGM(&SRVLIB/ZLIB) +
-                          MODULE(&MODLIB/ADLER32     &MODLIB/COMPRESS    +
-                                 &MODLIB/CRC32       &MODLIB/DEFLATE     +
-                                 &MODLIB/GZCLOSE     &MODLIB/GZLIB       +
-                                 &MODLIB/GZREAD      &MODLIB/GZWRITE     +
-                                 &MODLIB/INFBACK     &MODLIB/INFFAST     +
-                                 &MODLIB/INFLATE     &MODLIB/INFTREES    +
-                                 &MODLIB/TREES       &MODLIB/UNCOMPR     +
-                                 &MODLIB/ZUTIL)                          +
-                          SRCFILE(&SRCLIB/&CTLFILE) SRCMBR(BNDSRC)       +
-                          TEXT('ZLIB 1.2.8') TGTRLS(&TGTRLS)
-
-             ENDPGM
--- a/compat/zlib/as400/readme.txt
+++ b/compat/zlib/as400/readme.txt
@@ -1,115 +0,0 @@
-        ZLIB version 1.2.8 for AS400 installation instructions
-
-I) From an AS400 *SAVF file:
-
-1)      Unpacking archive to an AS400 save file
-
-On the AS400:
-
-_       Create the ZLIB AS400 library:
-
-        CRTLIB LIB(ZLIB) TYPE(*PROD) TEXT('ZLIB compression API library')
-
-_       Create a work save file, for example:
-
-                CRTSAVF FILE(ZLIB/ZLIBSAVF)
-
-On a PC connected to the target AS400:
-
-_       Unpack the save file image to a PC file "ZLIBSAVF"
-_       Upload this file into the save file on the AS400, for example
-                using ftp in BINARY mode.
-
-
-2)      Populating the ZLIB AS400 source library
-
-On the AS400:
-
-_       Extract the saved objects into the ZLIB AS400 library using:
-
-RSTOBJ OBJ(*ALL) SAVLIB(ZLIB) DEV(*SAVF) SAVF(ZLIB/ZLIBSAVF) RSTLIB(ZLIB)
-
-
-3)      Customize installation:
-
-_       Edit CL member ZLIB/TOOLS(COMPILE) and change parameters if needed,
-                according to the comments.
-
-_       Compile this member with:
-
-        CRTCLPGM PGM(ZLIB/COMPILE) SRCFILE(ZLIB/TOOLS) SRCMBR(COMPILE)
-
-
-4)      Compile and generate the service program:
-
-_       This can now be done by executing:
-
-        CALL PGM(ZLIB/COMPILE)
-
-
-
-II) From the original source distribution:
-
-1)      On the AS400, create the source library:
-
-        CRTLIB LIB(ZLIB) TYPE(*PROD) TEXT('ZLIB compression API library')
-
-2)      Create the source files:
-
-        CRTSRCPF FILE(ZLIB/SOURCES) RCDLEN(112) TEXT('ZLIB library modules')
-        CRTSRCPF FILE(ZLIB/H)       RCDLEN(112) TEXT('ZLIB library includes')
-        CRTSRCPF FILE(ZLIB/TOOLS)   RCDLEN(112) TEXT('ZLIB library control utilities')
-
-3)      From the machine hosting the distribution files, upload them (with
-                FTP in text mode, for example) according to the following table:
-
-    Original    AS400   AS400    AS400 AS400
-    file        file    member   type  description
-                SOURCES                Original ZLIB C subprogram sources
-    adler32.c           ADLER32  C     ZLIB - Compute the Adler-32 checksum of a dta strm
-    compress.c          COMPRESS C     ZLIB - Compress a memory buffer
-    crc32.c             CRC32    C     ZLIB - Compute the CRC-32 of a data stream
-    deflate.c           DEFLATE  C     ZLIB - Compress data using the deflation algorithm
-    gzclose.c           GZCLOSE  C     ZLIB - Close .gz files
-    gzlib.c             GZLIB    C     ZLIB - Miscellaneous .gz files IO support
-    gzread.c            GZREAD   C     ZLIB - Read .gz files
-    gzwrite.c           GZWRITE  C     ZLIB - Write .gz files
-    infback.c           INFBACK  C     ZLIB - Inflate using a callback interface
-    inffast.c           INFFAST  C     ZLIB - Fast proc. literals & length/distance pairs
-    inflate.c           INFLATE  C     ZLIB - Interface to inflate modules
-    inftrees.c          INFTREES C     ZLIB - Generate Huffman trees for efficient decode
-    trees.c             TREES    C     ZLIB - Output deflated data using Huffman coding
-    uncompr.c           UNCOMPR  C     ZLIB - Decompress a memory buffer
-    zutil.c             ZUTIL    C     ZLIB - Target dependent utility functions
-                H                      Original ZLIB C and ILE/RPG include files
-    crc32.h             CRC32    C     ZLIB - CRC32 tables
-    deflate.h           DEFLATE  C     ZLIB - Internal compression state
-    gzguts.h            GZGUTS   C     ZLIB - Definitions for the gzclose module
-    inffast.h           INFFAST  C     ZLIB - Header to use inffast.c
-    inffixed.h          INFFIXED C     ZLIB - Table for decoding fixed codes
-    inflate.h           INFLATE  C     ZLIB - Internal inflate state definitions
-    inftrees.h          INFTREES C     ZLIB - Header to use inftrees.c
-    trees.h             TREES    C     ZLIB - Created automatically with -DGEN_TREES_H
-    zconf.h             ZCONF    C     ZLIB - Compression library configuration
-    zlib.h              ZLIB     C     ZLIB - Compression library C user interface
-    as400/zlib.inc      ZLIB.INC RPGLE ZLIB - Compression library ILE RPG user interface
-    zutil.h             ZUTIL    C     ZLIB - Internal interface and configuration
-                TOOLS                  Building source software & AS/400 README
-    as400/bndsrc        BNDSRC         Entry point exportation list
-    as400/compile.clp   COMPILE  CLP   Compile sources & generate service program
-    as400/readme.txt    README   TXT   Installation instructions
-
-4)      Continue as in I)3).
-
-
-
-
-Notes:  For AS400 ILE RPG programmers, a /copy member defining the ZLIB
-                API prototypes for ILE RPG can be found in ZLIB/H(ZLIB.INC).
-                Please read comments in this member for more information.
-
-        Remember that most foreign textual data are ASCII coded: this
-                implementation does not handle conversion from/to ASCII, so
-                text data code conversions must be done explicitely.
-
-        Mainly for the reason above, always open zipped files in binary mode.
--- a/compat/zlib/compress.c
+++ b/compat/zlib/compress.c
@@ -1,5 +1,5 @@
 /* compress.c -- compress a memory buffer
- * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * Copyright (C) 1995-2005, 2014, 2016 Jean-loup Gailly, Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -28,16 +28,11 @@ int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
 {
    z_stream stream;
    int err;
+    const uInt max = (uInt)-1;
+    uLong left;

-    stream.next_in = (z_const Bytef *)source;
-    stream.avail_in = (uInt)sourceLen;
-#ifdef MAXSEG_64K
-    /* Check for source > 64K on 16-bit machine: */
-    if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
-#endif
-    stream.next_out = dest;
-    stream.avail_out = (uInt)*destLen;
-    if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
+    left = *destLen;
+    *destLen = 0;

    stream.zalloc = (alloc_func)0;
    stream.zfree = (free_func)0;
@@ -46,15 +41,26 @@ int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
    err = deflateInit(&stream, level);
    if (err != Z_OK) return err;

-    err = deflate(&stream, Z_FINISH);
-    if (err != Z_STREAM_END) {
-        deflateEnd(&stream);
-        return err == Z_OK ? Z_BUF_ERROR : err;
-    }
-    *destLen = stream.total_out;
+    stream.next_out = dest;
+    stream.avail_out = 0;
+    stream.next_in = (z_const Bytef *)source;
+    stream.avail_in = 0;

-    err = deflateEnd(&stream);
-    return err;
+    do {
+        if (stream.avail_out == 0) {
+            stream.avail_out = left > (uLong)max ? max : (uInt)left;
+            left -= stream.avail_out;
+        }
+        if (stream.avail_in == 0) {
+            stream.avail_in = sourceLen > (uLong)max ? max : (uInt)sourceLen;
+            sourceLen -= stream.avail_in;
+        }
+        err = deflate(&stream, sourceLen ? Z_NO_FLUSH : Z_FINISH);
+    } while (err == Z_OK);
+
+    *destLen = stream.total_out;
+    deflateEnd(&stream);
+    return err == Z_STREAM_END ? Z_OK : err;
 }

 /* ===========================================================================
--- a/compat/zlib/configure
+++ b/compat/zlib/configure
@@ -18,6 +18,18 @@ echo -------------------- >> configure.log
 echo $0 $* >> configure.log
 date >> configure.log

+# get source directory
+SRCDIR=`dirname $0`
+if test $SRCDIR = "."; then
+    ZINC=""
+    ZINCOUT="-I."
+    SRCDIR=""
+else
+    ZINC='-include zconf.h'
+    ZINCOUT='-I. -I$(SRCDIR)'
+    SRCDIR="$SRCDIR/"
+fi
+
 # set command prefix for cross-compilation
 if [ -n "${CHOST}" ]; then
    uname="`echo "${CHOST}" | sed -e 's/^[^-]*-\([^-]*\)$/\1/' -e 's/^[^-]*-[^-]*-\([^-]*\)$/\1/' -e 's/^[^-]*-[^-]*-\([^-]*\)-.*$/\1/'`"
@@ -28,10 +40,10 @@ fi
 STATICLIB=libz.a

 # extract zlib version numbers from zlib.h
-VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`
-VER3=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\\.[0-9]*\).*/\1/p' < zlib.h`
-VER2=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < zlib.h`
-VER1=`sed -n -e '/VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < zlib.h`
+VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < ${SRCDIR}zlib.h`
+VER3=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\\.[0-9]*\).*/\1/p' < ${SRCDIR}zlib.h`
+VER2=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < ${SRCDIR}zlib.h`
+VER1=`sed -n -e '/VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < ${SRCDIR}zlib.h`

 # establish commands for library building
 if "${CROSS_PREFIX}ar" --version >/dev/null 2>/dev/null || test $? -lt 126; then
@@ -73,6 +85,8 @@ zprefix=0
 zconst=0
 build64=0
 gcc=0
+warn=0
+debug=0
 old_cc="$CC"
 old_cflags="$CFLAGS"
 OBJC='$(OBJZ) $(OBJG)'
@@ -121,6 +135,8 @@ case "$1" in
    --sysconfdir=*) echo "ignored option: --sysconfdir" | tee -a configure.log; shift ;;
    --localstatedir=*) echo "ignored option: --localstatedir" | tee -a configure.log; shift ;;
    -c* | --const) zconst=1; shift ;;
+    -w* | --warn) warn=1; shift ;;
+    -d* | --debug) debug=1; shift ;;
    *)
      echo "unknown option: $1" | tee -a configure.log
      echo "$0 --help for help" | tee -a configure.log
@@ -159,34 +175,42 @@ case "$cc" in
 esac
 case `$cc -v 2>&1` in
  *gcc*) gcc=1 ;;
+  *clang*) gcc=1 ;;
 esac

 show $cc -c $test.c
 if test "$gcc" -eq 1 && ($cc -c $test.c) >> configure.log 2>&1; then
  echo ... using gcc >> configure.log
  CC="$cc"
-  CFLAGS="${CFLAGS--O3} ${ARCHS}"
+  CFLAGS="${CFLAGS--O3}"
  SFLAGS="${CFLAGS--O3} -fPIC"
+  if test "$ARCHS"; then
+    CFLAGS="${CFLAGS} ${ARCHS}"
    LDFLAGS="${LDFLAGS} ${ARCHS}"
+  fi
  if test $build64 -eq 1; then
    CFLAGS="${CFLAGS} -m64"
    SFLAGS="${SFLAGS} -m64"
  fi
-  if test "${ZLIBGCCWARN}" = "YES"; then
+  if test "$warn" -eq 1; then
    if test "$zconst" -eq 1; then
      CFLAGS="${CFLAGS} -Wall -Wextra -Wcast-qual -pedantic -DZLIB_CONST"
    else
      CFLAGS="${CFLAGS} -Wall -Wextra -pedantic"
    fi
  fi
+  if test $debug -eq 1; then
+    CFLAGS="${CFLAGS} -DZLIB_DEBUG"
+    SFLAGS="${SFLAGS} -DZLIB_DEBUG"
+  fi
  if test -z "$uname"; then
    uname=`(uname -s || echo unknown) 2>/dev/null`
  fi
  case "$uname" in
  Linux* | linux* | GNU | GNU/* | solaris*)
-        LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,zlib.map"} ;;
+        LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,${SRCDIR}zlib.map"} ;;
  *BSD | *bsd* | DragonFly)
-        LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,zlib.map"}
+        LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1,--version-script,${SRCDIR}zlib.map"}
        LDCONFIG="ldconfig -m" ;;
  CYGWIN* | Cygwin* | cygwin* | OS/2*)
        EXE='.exe' ;;
@@ -287,6 +311,9 @@ else
                 esac
             fi
         fi
+         if test -n "$ZINC"; then
+             ZINC='-I- -I. -I$(SRCDIR)'
+         fi
         ;;
  SunOS\ 4*) SFLAGS=${CFLAGS-"-O2 -PIC"}
             CFLAGS=${CFLAGS-"-O2"}
@@ -422,6 +449,65 @@ esac

 echo >> configure.log

+# check for size_t
+cat > $test.c <<EOF
+#include <stdio.h>
+#include <stdlib.h>
+size_t dummy = 0;
+EOF
+if try $CC -c $CFLAGS $test.c; then
+  echo "Checking for size_t... Yes." | tee -a configure.log
+  need_sizet=0
+else
+  echo "Checking for size_t... No." | tee -a configure.log
+  need_sizet=1
+fi
+
+echo >> configure.log
+
+# find the size_t integer type, if needed
+if test $need_sizet -eq 1; then
+  cat > $test.c <<EOF
+long long dummy = 0;
+EOF
+  if try $CC -c $CFLAGS $test.c; then
+    echo "Checking for long long... Yes." | tee -a configure.log
+    cat > $test.c <<EOF
+#include <stdio.h>
+int main(void) {
+    if (sizeof(void *) <= sizeof(int)) puts("int");
+    else if (sizeof(void *) <= sizeof(long)) puts("long");
+    else puts("z_longlong");
+    return 0;
+}
+EOF
+  else
+    echo "Checking for long long... No." | tee -a configure.log
+    cat > $test.c <<EOF
+#include <stdio.h>
+int main(void) {
+    if (sizeof(void *) <= sizeof(int)) puts("int");
+    else puts("long");
+    return 0;
+}
+EOF
+  fi
+  if try $CC $CFLAGS -o $test $test.c; then
+    sizet=`./$test`
+    echo "Checking for a pointer-size integer type..." $sizet"." | tee -a configure.log
+  else
+    echo "Failed to find a pointer-size integer type." | tee -a configure.log
+    leave 1
+  fi
+fi
+
+if test $need_sizet -eq 1; then
+  CFLAGS="${CFLAGS} -DNO_SIZE_T=${sizet}"
+  SFLAGS="${SFLAGS} -DNO_SIZE_T=${sizet}"
+fi
+
+echo >> configure.log
+
 # check for large file support, and if none, check for fseeko()
 cat > $test.c <<EOF
 #include <sys/types.h>
@@ -470,7 +556,7 @@ else
 fi

 # copy clean zconf.h for subsequent edits
-cp -p zconf.h.in zconf.h
+cp -p ${SRCDIR}zconf.h.in zconf.h

 echo >> configure.log

@@ -764,6 +850,7 @@ echo STATICLIB = $STATICLIB >> configure.log
 echo TEST = $TEST >> configure.log
 echo VER = $VER >> configure.log
 echo Z_U4 = $Z_U4 >> configure.log
+echo SRCDIR = $SRCDIR >> configure.log
 echo exec_prefix = $exec_prefix >> configure.log
 echo includedir = $includedir >> configure.log
 echo libdir = $libdir >> configure.log
@@ -773,7 +860,7 @@ echo sharedlibdir = $sharedlibdir >> configure.log
 echo uname = $uname >> configure.log

 # udpate Makefile with the configure results
-sed < Makefile.in "
+sed < ${SRCDIR}Makefile.in "
 /^CC *=/s#=.*#=$CC#
 /^CFLAGS *=/s#=.*#=$CFLAGS#
 /^SFLAGS *=/s#=.*#=$SFLAGS#
@@ -790,6 +877,9 @@ sed < Makefile.in "
 /^LDCONFIG *=/s#=.*#=$LDCONFIG#
 /^LDSHAREDLIBC *=/s#=.*#=$LDSHAREDLIBC#
 /^EXE *=/s#=.*#=$EXE#
+/^SRCDIR *=/s#=.*#=$SRCDIR#
+/^ZINC *=/s#=.*#=$ZINC#
+/^ZINCOUT *=/s#=.*#=$ZINCOUT#
 /^prefix *=/s#=.*#=$prefix#
 /^exec_prefix *=/s#=.*#=$exec_prefix#
 /^libdir *=/s#=.*#=$libdir#
@@ -803,7 +893,7 @@ sed < Makefile.in "
 " > Makefile

 # create zlib.pc with the configure results
-sed < zlib.pc.in "
+sed < ${SRCDIR}zlib.pc.in "
 /^CC *=/s#=.*#=$CC#
 /^CFLAGS *=/s#=.*#=$CFLAGS#
 /^CPP *=/s#=.*#=$CPP#
--- a/compat/zlib/contrib/README.contrib
+++ b/compat/zlib/contrib/README.contrib
@@ -38,7 +38,7 @@ inflate86/  by Chris Anderson <christop@charm.net>
 iostream/   by Kevin Ruland <kevin@rodin.wustl.edu>
        A C++ I/O streams interface to the zlib gz* functions

-iostream2/  by Tyge L<EFBFBD>vset <Tyge.Lovset@cmr.no>
+iostream2/  by Tyge Løvset <Tyge.Lovset@cmr.no>
        Another C++ I/O streams interface

 iostream3/  by Ludwig Schwardt <schwardt@sun.ac.za>
@@ -58,7 +58,7 @@ masmx86/    by Gilles Vollant <info@winimage.com>
 minizip/    by Gilles Vollant <info@winimage.com>
        Mini zip and unzip based on zlib
        Includes Zip64 support by Mathias Svensson <mathias@result42.com>
-        See http://www.winimage.com/zLibDll/unzip.html
+        See http://www.winimage.com/zLibDll/minizip.html

 pascal/     by Bob Dellaca <bobdl@xtra.co.nz> et al.
        Support for Pascal
--- a/compat/zlib/contrib/ada/zlib-streams.ads
+++ b/compat/zlib/contrib/ada/zlib-streams.ads
@@ -31,7 +31,7 @@ package ZLib.Streams is
      Mode   : in     Flush_Mode := Sync_Flush);
   --  Flush the written data to the back stream,
   --  all data placed to the compressor is flushing to the Back stream.
-   --  Should not be used untill necessary, becouse it is decreasing
+   --  Should not be used until necessary, because it is decreasing
   --  compression.

   function Read_Total_In (Stream : in Stream_Type) return Count;
@@ -97,13 +97,13 @@ private
      Rest_Last  : Stream_Element_Offset;
      --  Buffer for Read operation.
      --  We need to have this buffer in the record
-      --  becouse not all read data from back stream
+      --  because not all read data from back stream
      --  could be processed during the read operation.

      Buffer_Size : Stream_Element_Offset;
      --  Buffer size for write operation.
      --  We do not need to have this buffer
-      --  in the record becouse all data could be
+      --  in the record because all data could be
      --  processed in the write operation.

      Back       : Stream_Access;
--- a/compat/zlib/contrib/ada/zlib-thin.ads
+++ b/compat/zlib/contrib/ada/zlib-thin.ads
@@ -436,7 +436,7 @@ private

   pragma Import (C, inflateBackInit, "inflateBackInit_");

-   --  I stopped binding the inflateBack routines, becouse realize that
+   --  I stopped binding the inflateBack routines, because realize that
   --  it does not support zlib and gzip headers for now, and have no
   --  symmetric deflateBack routines.
   --  ZLib-Ada is symmetric regarding deflate/inflate data transformation
--- a/compat/zlib/contrib/blast/blast.c
+++ b/compat/zlib/contrib/blast/blast.c
@@ -1,7 +1,7 @@
 /* blast.c
- * Copyright (C) 2003, 2012 Mark Adler
+ * Copyright (C) 2003, 2012, 2013 Mark Adler
 * For conditions of distribution and use, see copyright notice in blast.h
- * version 1.2, 24 Oct 2012
+ * version 1.3, 24 Aug 2013
 *
 * blast.c decompresses data compressed by the PKWare Compression Library.
 * This function provides functionality similar to the explode() function of
@@ -24,8 +24,12 @@
 * 1.1  16 Feb 2003     - Fixed distance check for > 4 GB uncompressed data
 * 1.2  24 Oct 2012     - Add note about using binary mode in stdio
 *                      - Fix comparisons of differently signed integers
+ * 1.3  24 Aug 2013     - Return unused input from blast()
+ *                      - Fix test code to correctly report unused input
+ *                      - Enable the provision of initial input to blast()
 */

+#include <stddef.h>             /* for NULL */
 #include <setjmp.h>             /* for setjmp(), longjmp(), and jmp_buf */
 #include "blast.h"              /* prototype for blast() */

@@ -256,7 +260,7 @@ local int construct(struct huffman *h, const unsigned char *rep, int n)
 *   next, 0 for literals, 1 for length/distance.
 *
 * - If literals are uncoded, then the next eight bits are the literal, in the
- *   normal bit order in th stream, i.e. no bit-reversal is needed. Similarly,
+ *   normal bit order in the stream, i.e. no bit-reversal is needed. Similarly,
 *   no bit reversal is needed for either the length extra bits or the distance
 *   extra bits.
 *
@@ -376,7 +380,8 @@ local int decomp(struct state *s)
 }

 /* See comments in blast.h */
-int blast(blast_in infun, void *inhow, blast_out outfun, void *outhow)
+int blast(blast_in infun, void *inhow, blast_out outfun, void *outhow,
+          unsigned *left, unsigned char **in)
 {
    struct state s;             /* input/output state */
    int err;                    /* return value */
@@ -384,6 +389,11 @@ int blast(blast_in infun, void *inhow, blast_out outfun, void *outhow)
    /* initialize input state */
    s.infun = infun;
    s.inhow = inhow;
+    if (left != NULL && *left) {
+        s.left = *left;
+        s.in = *in;
+    }
+    else
        s.left = 0;
    s.bitbuf = 0;
    s.bitcnt = 0;
@@ -400,6 +410,12 @@ int blast(blast_in infun, void *inhow, blast_out outfun, void *outhow)
    else
        err = decomp(&s);               /* decompress */

+    /* return unused input */
+    if (left != NULL)
+        *left = s.left;
+    if (in != NULL)
+        *in = s.left ? s.in : NULL;
+
    /* write any leftover output and update the error code if needed */
    if (err != 1 && s.next && s.outfun(s.outhow, s.out, s.next) && err == 0)
        err = 1;
@@ -429,16 +445,20 @@ local int outf(void *how, unsigned char *buf, unsigned len)
 /* Decompress a PKWare Compression Library stream from stdin to stdout */
 int main(void)
 {
-    int ret, n;
+    int ret;
+    unsigned left;

    /* decompress to stdout */
-    ret = blast(inf, stdin, outf, stdout);
-    if (ret != 0) fprintf(stderr, "blast error: %d\n", ret);
+    left = 0;
+    ret = blast(inf, stdin, outf, stdout, &left, NULL);
+    if (ret != 0)
+        fprintf(stderr, "blast error: %d\n", ret);

-    /* see if there are any leftover bytes */
-    n = 0;
-    while (getchar() != EOF) n++;
-    if (n) fprintf(stderr, "blast warning: %d unused bytes of input\n", n);
+    /* count any leftover bytes */
+    while (getchar() != EOF)
+        left++;
+    if (left)
+        fprintf(stderr, "blast warning: %u unused bytes of input\n", left);

    /* return blast() error code */
    return ret;
--- a/compat/zlib/contrib/blast/blast.h
+++ b/compat/zlib/contrib/blast/blast.h
@@ -1,6 +1,6 @@
 /* blast.h -- interface for blast.c
-  Copyright (C) 2003, 2012 Mark Adler
-  version 1.2, 24 Oct 2012
+  Copyright (C) 2003, 2012, 2013 Mark Adler
+  version 1.3, 24 Aug 2013

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the author be held liable for any damages
@@ -42,7 +42,8 @@ typedef int (*blast_out)(void *how, unsigned char *buf, unsigned len);
 */


-int blast(blast_in infun, void *inhow, blast_out outfun, void *outhow);
+int blast(blast_in infun, void *inhow, blast_out outfun, void *outhow,
+          unsigned *left, unsigned char **in);
 /* Decompress input to output using the provided infun() and outfun() calls.
 * On success, the return value of blast() is zero.  If there is an error in
 * the source data, i.e. it is not in the proper format, then a negative value
@@ -55,12 +56,19 @@ int blast(blast_in infun, void *inhow, blast_out outfun, void *outhow);
 * an input error.  (blast() only asks for input if it needs it.)  inhow is for
 * use by the application to pass an input descriptor to infun(), if desired.
 *
+ * If left and in are not NULL and *left is not zero when blast() is called,
+ * then the *left bytes are *in are consumed for input before infun() is used.
+ *
 * The output function is invoked: err = outfun(how, buf, len), where the bytes
 * to be written are buf[0..len-1].  If err is not zero, then blast() returns
 * with an output error.  outfun() is always called with len <= 4096.  outhow
 * is for use by the application to pass an output descriptor to outfun(), if
 * desired.
 *
+ * If there is any unused input, *left is set to the number of bytes that were
+ * read and *in points to them.  Otherwise *left is set to zero and *in is set
+ * to NULL.  If left or in are NULL, then they are not set.
+ *
 * The return codes are:
 *
 *   2:  ran out of input before completing decompression
--- a/compat/zlib/contrib/delphi/ZLib.pas
+++ b/compat/zlib/contrib/delphi/ZLib.pas
@@ -152,7 +152,7 @@ procedure DecompressToUserBuf(const InBuf: Pointer; InBytes: Integer;
  const OutBuf: Pointer; BufSize: Integer);

 const
-  zlib_version = '1.2.8';
+  zlib_version = '1.2.11';

 type
  EZlibError = class(Exception);
--- a/compat/zlib/contrib/dotzlib/DotZLib/UnitTests.cs
+++ b/compat/zlib/contrib/dotzlib/DotZLib/UnitTests.cs
@@ -156,7 +156,7 @@ namespace DotZLibTests
        public void Info_Version()
        {
            Info info = new Info();
-            Assert.AreEqual("1.2.8", Info.Version);
+            Assert.AreEqual("1.2.11", Info.Version);
            Assert.AreEqual(32, info.SizeOfUInt);
            Assert.AreEqual(32, info.SizeOfULong);
            Assert.AreEqual(32, info.SizeOfPointer);
--- a/compat/zlib/contrib/infback9/inftree9.c
+++ b/compat/zlib/contrib/infback9/inftree9.c
@@ -1,5 +1,5 @@
 /* inftree9.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2013 Mark Adler
+ * Copyright (C) 1995-2017 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -9,7 +9,7 @@
 #define MAXBITS 15

 const char inflate9_copyright[] =
-   " inflate9 1.2.8 Copyright 1995-2013 Mark Adler ";
+   " inflate9 1.2.11 Copyright 1995-2017 Mark Adler ";
 /*
  If you use the zlib library in a product, an acknowledgment is welcome
  in the documentation of your product. If for some reason you cannot
@@ -64,7 +64,7 @@ unsigned short FAR *work;
    static const unsigned short lext[31] = { /* Length codes 257..285 extra */
        128, 128, 128, 128, 128, 128, 128, 128, 129, 129, 129, 129,
        130, 130, 130, 130, 131, 131, 131, 131, 132, 132, 132, 132,
-        133, 133, 133, 133, 144, 72, 78};
+        133, 133, 133, 133, 144, 77, 202};
    static const unsigned short dbase[32] = { /* Distance codes 0..31 base */
        1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49,
        65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073,
--- a/compat/zlib/contrib/minizip/configure.ac
+++ b/compat/zlib/contrib/minizip/configure.ac
@@ -1,7 +1,7 @@
 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.

-AC_INIT([minizip], [1.2.8], [bugzilla.redhat.com])
+AC_INIT([minizip], [1.2.11], [bugzilla.redhat.com])
 AC_CONFIG_SRCDIR([minizip.c])
 AM_INIT_AUTOMAKE([foreign])
 LT_INIT
--- a/compat/zlib/contrib/minizip/crypt.h
+++ b/compat/zlib/contrib/minizip/crypt.h
@@ -37,6 +37,7 @@ static int decrypt_byte(unsigned long* pkeys, const z_crc_t* pcrc_32_tab)
    unsigned temp;  /* POTENTIAL BUG:  temp*(temp^1) may overflow in an
                     * unpredictable manner on 16-bit systems; not a problem
                     * with any known compiler so far, though */
+    (void)pcrc_32_tab;

    temp = ((unsigned)(*(pkeys+2)) & 0xffff) | 2;
    return (int)(((temp * (temp ^ 1)) >> 8) & 0xff);
@@ -51,7 +52,7 @@ static int update_keys(unsigned long* pkeys,const z_crc_t* pcrc_32_tab,int c)
    (*(pkeys+1)) += (*(pkeys+0)) & 0xff;
    (*(pkeys+1)) = (*(pkeys+1)) * 134775813L + 1;
    {
-      register int keyshift = (int)((*(pkeys+1)) >> 24);
+      int keyshift = (int)((*(pkeys+1)) >> 24);
      (*(pkeys+2)) = CRC32((*(pkeys+2)), keyshift);
    }
    return c;
--- a/compat/zlib/contrib/minizip/ioapi.c
+++ b/compat/zlib/contrib/minizip/ioapi.c
@@ -14,7 +14,11 @@
        #define _CRT_SECURE_NO_WARNINGS
 #endif

-#if defined(__APPLE__) || defined(IOAPI_NO_64)
+#if defined(_WIN32)
+#define FOPEN_FUNC(filename, mode) fopen(filename, mode)
+#define FTELLO_FUNC(stream) _ftelli64(stream)
+#define FSEEKO_FUNC(stream, offset, origin) _fseeki64(stream, offset, origin)
+#elif defined(__APPLE__) || defined(IOAPI_NO_64)
 // In darwin and perhaps other BSD variants off_t is a 64 bit value, hence no need for specific 64 bit functions
 #define FOPEN_FUNC(filename, mode) fopen(filename, mode)
 #define FTELLO_FUNC(stream) ftello(stream)
--- a/compat/zlib/contrib/minizip/iowin32.c
+++ b/compat/zlib/contrib/minizip/iowin32.c
@@ -26,8 +26,9 @@
 #endif


+// see Include/shared/winapifamily.h in the Windows Kit
 #if defined(WINAPI_FAMILY_PARTITION) && (!(defined(IOWIN32_USING_WINRT_API)))
-#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
+#if WINAPI_FAMILY_ONE_PARTITION(WINAPI_FAMILY, WINAPI_PARTITION_APP)
 #define IOWIN32_USING_WINRT_API 1
 #endif
 #endif
@@ -243,7 +244,7 @@ static BOOL MySetFilePointerEx(HANDLE hFile, LARGE_INTEGER pos, LARGE_INTEGER *n
    return SetFilePointerEx(hFile, pos, newPos, dwMoveMethod);
 #else
    LONG lHigh = pos.HighPart;
-    DWORD dwNewPos = SetFilePointer(hFile, pos.LowPart, &lHigh, FILE_CURRENT);
+    DWORD dwNewPos = SetFilePointer(hFile, pos.LowPart, &lHigh, dwMoveMethod);
    BOOL fOk = TRUE;
    if (dwNewPos == 0xFFFFFFFF)
        if (GetLastError() != NO_ERROR)
@@ -370,7 +371,7 @@ long ZCALLBACK win32_seek64_file_func (voidpf opaque, voidpf stream,ZPOS64_T off
    {
        LARGE_INTEGER pos;
        pos.QuadPart = offset;
-        if (!MySetFilePointerEx(hFile, pos, NULL, FILE_CURRENT))
+        if (!MySetFilePointerEx(hFile, pos, NULL, dwMoveMethod))
        {
            DWORD dwErr = GetLastError();
            ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr;
--- a/compat/zlib/contrib/minizip/miniunz.c
+++ b/compat/zlib/contrib/minizip/miniunz.c
@@ -97,7 +97,7 @@ void change_file_date(filename,dosdate,tmu_date)
  SetFileTime(hFile,&ftm,&ftLastAcc,&ftm);
  CloseHandle(hFile);
 #else
-#ifdef unix || __APPLE__
+#if defined(unix) || defined(__APPLE__)
  struct utimbuf ut;
  struct tm newdate;
  newdate.tm_sec = tmu_date.tm_sec;
--- a/compat/zlib/contrib/minizip/minizip.c
+++ b/compat/zlib/contrib/minizip/minizip.c
@@ -12,7 +12,6 @@
         Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )
 */

-
 #if (!defined(_WIN32)) && (!defined(WIN32)) && (!defined(__APPLE__))
        #ifndef __USE_FILE_OFFSET64
                #define __USE_FILE_OFFSET64
@@ -28,7 +27,11 @@
        #endif
 #endif

-#ifdef __APPLE__
+#if defined(_WIN32)
+#define FOPEN_FUNC(filename, mode) fopen(filename, mode)
+#define FTELLO_FUNC(stream) _ftelli64(stream)
+#define FSEEKO_FUNC(stream, offset, origin) _fseeki64(stream, offset, origin)
+#elif defined(__APPLE__) || defined(IOAPI_NO_64)
 // In darwin and perhaps other BSD variants off_t is a 64 bit value, hence no need for specific 64 bit functions
 #define FOPEN_FUNC(filename, mode) fopen(filename, mode)
 #define FTELLO_FUNC(stream) ftello(stream)
@@ -39,8 +42,7 @@
 #define FSEEKO_FUNC(stream, offset, origin) fseeko64(stream, offset, origin)
 #endif

-
-
+#include "tinydir.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -72,7 +74,7 @@

 #ifdef _WIN32
 uLong filetime(f, tmzip, dt)
-    char *f;                /* name of file to get info on */
+    const char *f;         /* name of file to get info on */
    tm_zip *tmzip;         /* return value: access, modific. and creation times */
    uLong *dt;             /* dostime */
 {
@@ -94,9 +96,9 @@ uLong filetime(f, tmzip, dt)
  return ret;
 }
 #else
-#ifdef unix || __APPLE__
+#if defined(unix) || defined(__APPLE__)
 uLong filetime(f, tmzip, dt)
-    char *f;               /* name of file to get info on */
+    const char *f;         /* name of file to get info on */
    tm_zip *tmzip;         /* return value: access, modific. and creation times */
    uLong *dt;             /* dostime */
 {
@@ -138,7 +140,7 @@ uLong filetime(f, tmzip, dt)
 }
 #else
 uLong filetime(f, tmzip, dt)
-    char *f;                /* name of file to get info on */
+    const char *f;         /* name of file to get info on */
    tm_zip *tmzip;         /* return value: access, modific. and creation times */
    uLong *dt;             /* dostime */
 {
@@ -172,6 +174,7 @@ void do_banner()
 void do_help()
 {
    printf("Usage : minizip [-o] [-a] [-0 to -9] [-p password] [-j] file.zip [files_to_add]\n\n" \
+           "  -r  Scan directories recursively\n" \
           "  -o  Overwrite existing file.zip\n" \
           "  -a  Append to existing file.zip\n" \
           "  -0  Store only\n" \
@@ -243,12 +246,153 @@ int isLargeFile(const char* filename)
 return largeFile;
 }

+void addFileToZip(zipFile zf, const char *filenameinzip, const char *password, int opt_exclude_path,int opt_compress_level) {
+    FILE * fin;
+    int size_read;
+    const char *savefilenameinzip;
+    zip_fileinfo zi;
+    unsigned long crcFile=0;
+    int zip64 = 0;
+    int err=0;
+    int size_buf=WRITEBUFFERSIZE;
+    unsigned char buf[WRITEBUFFERSIZE];
+    zi.tmz_date.tm_sec = zi.tmz_date.tm_min = zi.tmz_date.tm_hour =
+    zi.tmz_date.tm_mday = zi.tmz_date.tm_mon = zi.tmz_date.tm_year = 0;
+    zi.dosDate = 0;
+    zi.internal_fa = 0;
+    zi.external_fa = 0;
+    filetime(filenameinzip,&zi.tmz_date,&zi.dosDate);
+
+/*
+    err = zipOpenNewFileInZip(zf,filenameinzip,&zi,
+                     NULL,0,NULL,0,NULL / * comment * /,
+                     (opt_compress_level != 0) ? Z_DEFLATED : 0,
+                     opt_compress_level);
+*/
+    if ((password != NULL) && (err==ZIP_OK))
+        err = getFileCrc(filenameinzip,buf,size_buf,&crcFile);
+
+    zip64 = isLargeFile(filenameinzip);
+
+   /* The path name saved, should not include a leading slash. */
+   /*if it did, windows/xp and dynazip couldn't read the zip file. */
+     savefilenameinzip = filenameinzip;
+     while( savefilenameinzip[0] == '\\' || savefilenameinzip[0] == '/' )
+     {
+         savefilenameinzip++;
+     }
+
+     /*should the zip file contain any path at all?*/
+     if( opt_exclude_path )
+     {
+         const char *tmpptr;
+         const char *lastslash = 0;
+         for( tmpptr = savefilenameinzip; *tmpptr; tmpptr++)
+         {
+             if( *tmpptr == '\\' || *tmpptr == '/')
+             {
+                 lastslash = tmpptr;
+             }
+         }
+         if( lastslash != NULL )
+         {
+             savefilenameinzip = lastslash+1; // base filename follows last slash.
+         }
+     }
+
+     /**/
+    err = zipOpenNewFileInZip3_64(zf,savefilenameinzip,&zi,
+                     NULL,0,NULL,0,NULL /* comment*/,
+                     (opt_compress_level != 0) ? Z_DEFLATED : 0,
+                     opt_compress_level,0,
+                     /* -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY, */
+                     -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY,
+                     password,crcFile, zip64);
+
+    if (err != ZIP_OK)
+        printf("error in opening %s in zipfile\n",filenameinzip);
+    else
+    {
+        fin = FOPEN_FUNC(filenameinzip,"rb");
+        if (fin==NULL)
+        {
+            err=ZIP_ERRNO;
+            printf("error in opening %s for reading\n",filenameinzip);
+        }
+    }
+
+    if (err == ZIP_OK)
+        do
+        {
+            err = ZIP_OK;
+            size_read = (int)fread(buf,1,size_buf,fin);
+            if (size_read < size_buf)
+                if (feof(fin)==0)
+            {
+                printf("error in reading %s\n",filenameinzip);
+                err = ZIP_ERRNO;
+            }
+
+            if (size_read>0)
+            {
+                err = zipWriteInFileInZip (zf,buf,size_read);
+                if (err<0)
+                {
+                    printf("error in writing %s in the zipfile\n",
+                                     filenameinzip);
+                }
+
+            }
+        } while ((err == ZIP_OK) && (size_read>0));
+
+    if (fin)
+        fclose(fin);
+
+    if (err<0)
+        err=ZIP_ERRNO;
+    else
+    {
+        err = zipCloseFileInZip(zf);
+        if (err!=ZIP_OK)
+            printf("error in closing %s in the zipfile\n",
+                        filenameinzip);
+    }
+}
+
+
+void addPathToZip(zipFile zf, const char *filenameinzip, const char *password, int opt_exclude_path,int opt_compress_level) {
+    tinydir_dir dir;
+    int i;
+    char newname[512];
+
+    tinydir_open_sorted(&dir, filenameinzip);
+
+    for (i = 0; i < dir.n_files; i++)
+    {
+        tinydir_file file;
+        tinydir_readfile_n(&dir, &file, i);
+        if(strcmp(file.name,".")==0) continue;
+        if(strcmp(file.name,"..")==0) continue;
+        sprintf(newname,"%s/%s",dir.path,file.name);
+        if (file.is_dir)
+        {
+            addPathToZip(zf,newname,password,opt_exclude_path,opt_compress_level);
+        } else {
+            addFileToZip(zf,newname,password,opt_exclude_path,opt_compress_level);
+        }
+    }
+
+    tinydir_close(&dir);
+}
+
+
 int main(argc,argv)
    int argc;
    char *argv[];
 {
    int i;
-    int opt_overwrite=0;
+    int opt_recursive=0;
+    int opt_overwrite=1;
    int opt_compress_level=Z_DEFAULT_COMPRESSION;
    int opt_exclude_path=0;
    int zipfilenamearg = 0;
@@ -285,7 +429,8 @@ int main(argc,argv)
                        opt_compress_level = c-'0';
                    if ((c=='j') || (c=='J'))
                        opt_exclude_path = 1;
-
+                    if ((c=='r') || (c=='R'))
+                        opt_recursive = 1;
                    if (((c=='p') || (c=='P')) && (i+1<argc))
                    {
                        password=argv[i+1];
@@ -392,117 +537,14 @@ int main(argc,argv)
                  ((argv[i][1]=='o') || (argv[i][1]=='O') ||
                   (argv[i][1]=='a') || (argv[i][1]=='A') ||
                   (argv[i][1]=='p') || (argv[i][1]=='P') ||
+                   (argv[i][1]=='r') || (argv[i][1]=='R') ||
                   ((argv[i][1]>='0') || (argv[i][1]<='9'))) &&
                  (strlen(argv[i]) == 2)))
            {
-                FILE * fin;
-                int size_read;
-                const char* filenameinzip = argv[i];
-                const char *savefilenameinzip;
-                zip_fileinfo zi;
-                unsigned long crcFile=0;
-                int zip64 = 0;
-
-                zi.tmz_date.tm_sec = zi.tmz_date.tm_min = zi.tmz_date.tm_hour =
-                zi.tmz_date.tm_mday = zi.tmz_date.tm_mon = zi.tmz_date.tm_year = 0;
-                zi.dosDate = 0;
-                zi.internal_fa = 0;
-                zi.external_fa = 0;
-                filetime(filenameinzip,&zi.tmz_date,&zi.dosDate);
-
-/*
-                err = zipOpenNewFileInZip(zf,filenameinzip,&zi,
-                                 NULL,0,NULL,0,NULL / * comment * /,
-                                 (opt_compress_level != 0) ? Z_DEFLATED : 0,
-                                 opt_compress_level);
-*/
-                if ((password != NULL) && (err==ZIP_OK))
-                    err = getFileCrc(filenameinzip,buf,size_buf,&crcFile);
-
-                zip64 = isLargeFile(filenameinzip);
-
-                                                         /* The path name saved, should not include a leading slash. */
-               /*if it did, windows/xp and dynazip couldn't read the zip file. */
-                 savefilenameinzip = filenameinzip;
-                 while( savefilenameinzip[0] == '\\' || savefilenameinzip[0] == '/' )
-                 {
-                     savefilenameinzip++;
-                 }
-
-                 /*should the zip file contain any path at all?*/
-                 if( opt_exclude_path )
-                 {
-                     const char *tmpptr;
-                     const char *lastslash = 0;
-                     for( tmpptr = savefilenameinzip; *tmpptr; tmpptr++)
-                     {
-                         if( *tmpptr == '\\' || *tmpptr == '/')
-                         {
-                             lastslash = tmpptr;
-                         }
-                     }
-                     if( lastslash != NULL )
-                     {
-                         savefilenameinzip = lastslash+1; // base filename follows last slash.
-                     }
-                 }
-
-                 /**/
-                err = zipOpenNewFileInZip3_64(zf,savefilenameinzip,&zi,
-                                 NULL,0,NULL,0,NULL /* comment*/,
-                                 (opt_compress_level != 0) ? Z_DEFLATED : 0,
-                                 opt_compress_level,0,
-                                 /* -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY, */
-                                 -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY,
-                                 password,crcFile, zip64);
-
-                if (err != ZIP_OK)
-                    printf("error in opening %s in zipfile\n",filenameinzip);
-                else
-                {
-                    fin = FOPEN_FUNC(filenameinzip,"rb");
-                    if (fin==NULL)
-                    {
-                        err=ZIP_ERRNO;
-                        printf("error in opening %s for reading\n",filenameinzip);
-                    }
-                }
-
-                if (err == ZIP_OK)
-                    do
-                    {
-                        err = ZIP_OK;
-                        size_read = (int)fread(buf,1,size_buf,fin);
-                        if (size_read < size_buf)
-                            if (feof(fin)==0)
-                        {
-                            printf("error in reading %s\n",filenameinzip);
-                            err = ZIP_ERRNO;
-                        }
-
-                        if (size_read>0)
-                        {
-                            err = zipWriteInFileInZip (zf,buf,size_read);
-                            if (err<0)
-                            {
-                                printf("error in writing %s in the zipfile\n",
-                                                 filenameinzip);
-                            }
-
-                        }
-                    } while ((err == ZIP_OK) && (size_read>0));
-
-                if (fin)
-                    fclose(fin);
-
-                if (err<0)
-                    err=ZIP_ERRNO;
-                else
-                {
-                    err = zipCloseFileInZip(zf);
-                    if (err!=ZIP_OK)
-                        printf("error in closing %s in the zipfile\n",
-                                    filenameinzip);
+                if(opt_recursive) {
+                    addPathToZip(zf,argv[i],password,opt_exclude_path,opt_compress_level);
+                } else {
+                    addFileToZip(zf,argv[i],password,opt_exclude_path,opt_compress_level);
                }
            }
        }
--- a/compat/zlib/contrib/minizip/tinydir.h
+++ b/compat/zlib/contrib/minizip/tinydir.h
@@ -0,0 +1,816 @@
+/*
+Copyright (c) 2013-2017, tinydir authors:
+- Cong Xu
+- Lautis Sun
+- Baudouin Feildel
+- Andargor <andargor@yahoo.com>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+#ifndef TINYDIR_H
+#define TINYDIR_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if ((defined _UNICODE) && !(defined UNICODE))
+#define UNICODE
+#endif
+
+#if ((defined UNICODE) && !(defined _UNICODE))
+#define _UNICODE
+#endif
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef _MSC_VER
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+# include <tchar.h>
+# pragma warning(push)
+# pragma warning (disable : 4996)
+#else
+# include <dirent.h>
+# include <libgen.h>
+# include <sys/stat.h>
+# include <stddef.h>
+#endif
+#ifdef __MINGW32__
+# include <tchar.h>
+#endif
+
+
+/* types */
+
+/* Windows UNICODE wide character support */
+#if defined _MSC_VER || defined __MINGW32__
+# define _tinydir_char_t TCHAR
+# define TINYDIR_STRING(s) _TEXT(s)
+# define _tinydir_strlen _tcslen
+# define _tinydir_strcpy _tcscpy
+# define _tinydir_strcat _tcscat
+# define _tinydir_strcmp _tcscmp
+# define _tinydir_strrchr _tcsrchr
+# define _tinydir_strncmp _tcsncmp
+#else
+# define _tinydir_char_t char
+# define TINYDIR_STRING(s) s
+# define _tinydir_strlen strlen
+# define _tinydir_strcpy strcpy
+# define _tinydir_strcat strcat
+# define _tinydir_strcmp strcmp
+# define _tinydir_strrchr strrchr
+# define _tinydir_strncmp strncmp
+#endif
+
+#if (defined _MSC_VER || defined __MINGW32__)
+# include <windows.h>
+# define _TINYDIR_PATH_MAX MAX_PATH
+#elif defined  __linux__
+# include <limits.h>
+# define _TINYDIR_PATH_MAX PATH_MAX
+#elif defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
+# include <sys/param.h>
+# if defined(BSD)
+#  include <limits.h>
+#  define _TINYDIR_PATH_MAX PATH_MAX
+# endif
+#endif
+
+#ifndef _TINYDIR_PATH_MAX
+#define _TINYDIR_PATH_MAX 4096
+#endif
+
+#ifdef _MSC_VER
+/* extra chars for the "\\*" mask */
+# define _TINYDIR_PATH_EXTRA 2
+#else
+# define _TINYDIR_PATH_EXTRA 0
+#endif
+
+#define _TINYDIR_FILENAME_MAX 256
+
+#if (defined _MSC_VER || defined __MINGW32__)
+#define _TINYDIR_DRIVE_MAX 3
+#endif
+
+#ifdef _MSC_VER
+# define _TINYDIR_FUNC static __inline
+#elif !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L
+# define _TINYDIR_FUNC static __inline__
+#else
+# define _TINYDIR_FUNC static inline
+#endif
+
+/* readdir_r usage; define TINYDIR_USE_READDIR_R to use it (if supported) */
+#ifdef TINYDIR_USE_READDIR_R
+
+/* readdir_r is a POSIX-only function, and may not be available under various
+ * environments/settings, e.g. MinGW. Use readdir fallback */
+#if _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _BSD_SOURCE || _SVID_SOURCE ||\
+	_POSIX_SOURCE
+# define _TINYDIR_HAS_READDIR_R
+#endif
+#if _POSIX_C_SOURCE >= 200112L
+# define _TINYDIR_HAS_FPATHCONF
+# include <unistd.h>
+#endif
+#if _BSD_SOURCE || _SVID_SOURCE || \
+	(_POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700)
+# define _TINYDIR_HAS_DIRFD
+# include <sys/types.h>
+#endif
+#if defined _TINYDIR_HAS_FPATHCONF && defined _TINYDIR_HAS_DIRFD &&\
+	defined _PC_NAME_MAX
+# define _TINYDIR_USE_FPATHCONF
+#endif
+#if defined __MINGW32__ || !defined _TINYDIR_HAS_READDIR_R ||\
+	!(defined _TINYDIR_USE_FPATHCONF || defined NAME_MAX)
+# define _TINYDIR_USE_READDIR
+#endif
+
+/* Use readdir by default */
+#else
+# define _TINYDIR_USE_READDIR
+#endif
+
+/* MINGW32 has two versions of dirent, ASCII and UNICODE*/
+#ifndef _MSC_VER
+#if (defined __MINGW32__) && (defined _UNICODE)
+#define _TINYDIR_DIR _WDIR
+#define _tinydir_dirent _wdirent
+#define _tinydir_opendir _wopendir
+#define _tinydir_readdir _wreaddir
+#define _tinydir_closedir _wclosedir
+#else
+#define _TINYDIR_DIR DIR
+#define _tinydir_dirent dirent
+#define _tinydir_opendir opendir
+#define _tinydir_readdir readdir
+#define _tinydir_closedir closedir
+#endif
+#endif
+
+/* Allow user to use a custom allocator by defining _TINYDIR_MALLOC and _TINYDIR_FREE. */
+#if    defined(_TINYDIR_MALLOC) &&  defined(_TINYDIR_FREE)
+#elif !defined(_TINYDIR_MALLOC) && !defined(_TINYDIR_FREE)
+#else
+#error "Either define both alloc and free or none of them!"
+#endif
+
+#if !defined(_TINYDIR_MALLOC)
+	#define _TINYDIR_MALLOC(_size) malloc(_size)
+	#define _TINYDIR_FREE(_ptr)    free(_ptr)
+#endif /* !defined(_TINYDIR_MALLOC) */
+
+typedef struct tinydir_file
+{
+	_tinydir_char_t path[_TINYDIR_PATH_MAX];
+	_tinydir_char_t name[_TINYDIR_FILENAME_MAX];
+	_tinydir_char_t *extension;
+	int is_dir;
+	int is_reg;
+
+#ifndef _MSC_VER
+#ifdef __MINGW32__
+	struct _stat _s;
+#else
+	struct stat _s;
+#endif
+#endif
+} tinydir_file;
+
+typedef struct tinydir_dir
+{
+	_tinydir_char_t path[_TINYDIR_PATH_MAX];
+	int has_next;
+	size_t n_files;
+
+	tinydir_file *_files;
+#ifdef _MSC_VER
+	HANDLE _h;
+	WIN32_FIND_DATA _f;
+#else
+	_TINYDIR_DIR *_d;
+	struct _tinydir_dirent *_e;
+#ifndef _TINYDIR_USE_READDIR
+	struct _tinydir_dirent *_ep;
+#endif
+#endif
+} tinydir_dir;
+
+
+/* declarations */
+
+_TINYDIR_FUNC
+int tinydir_open(tinydir_dir *dir, const _tinydir_char_t *path);
+_TINYDIR_FUNC
+int tinydir_open_sorted(tinydir_dir *dir, const _tinydir_char_t *path);
+_TINYDIR_FUNC
+void tinydir_close(tinydir_dir *dir);
+
+_TINYDIR_FUNC
+int tinydir_next(tinydir_dir *dir);
+_TINYDIR_FUNC
+int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file);
+_TINYDIR_FUNC
+int tinydir_readfile_n(const tinydir_dir *dir, tinydir_file *file, size_t i);
+_TINYDIR_FUNC
+int tinydir_open_subdir_n(tinydir_dir *dir, size_t i);
+
+_TINYDIR_FUNC
+int tinydir_file_open(tinydir_file *file, const _tinydir_char_t *path);
+_TINYDIR_FUNC
+void _tinydir_get_ext(tinydir_file *file);
+_TINYDIR_FUNC
+int _tinydir_file_cmp(const void *a, const void *b);
+#ifndef _MSC_VER
+#ifndef _TINYDIR_USE_READDIR
+_TINYDIR_FUNC
+size_t _tinydir_dirent_buf_size(_TINYDIR_DIR *dirp);
+#endif
+#endif
+
+
+/* definitions*/
+
+_TINYDIR_FUNC
+int tinydir_open(tinydir_dir *dir, const _tinydir_char_t *path)
+{
+#ifndef _MSC_VER
+#ifndef _TINYDIR_USE_READDIR
+	int error;
+	int size;	/* using int size */
+#endif
+#else
+	_tinydir_char_t path_buf[_TINYDIR_PATH_MAX];
+#endif
+	_tinydir_char_t *pathp;
+
+	if (dir == NULL || path == NULL || _tinydir_strlen(path) == 0)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+	if (_tinydir_strlen(path) + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX)
+	{
+		errno = ENAMETOOLONG;
+		return -1;
+	}
+
+	/* initialise dir */
+	dir->_files = NULL;
+#ifdef _MSC_VER
+	dir->_h = INVALID_HANDLE_VALUE;
+#else
+	dir->_d = NULL;
+#ifndef _TINYDIR_USE_READDIR
+	dir->_ep = NULL;
+#endif
+#endif
+	tinydir_close(dir);
+
+	_tinydir_strcpy(dir->path, path);
+	/* Remove trailing slashes */
+	pathp = &dir->path[_tinydir_strlen(dir->path) - 1];
+	while (pathp != dir->path && (*pathp == TINYDIR_STRING('\\') || *pathp == TINYDIR_STRING('/')))
+	{
+		*pathp = TINYDIR_STRING('\0');
+		pathp++;
+	}
+#ifdef _MSC_VER
+	_tinydir_strcpy(path_buf, dir->path);
+	_tinydir_strcat(path_buf, TINYDIR_STRING("\\*"));
+#if (defined WINAPI_FAMILY) && (WINAPI_FAMILY != WINAPI_FAMILY_DESKTOP_APP)
+	dir->_h = FindFirstFileEx(path_buf, FindExInfoStandard, &dir->_f, FindExSearchNameMatch, NULL, 0);
+#else
+	dir->_h = FindFirstFile(path_buf, &dir->_f);
+#endif
+	if (dir->_h == INVALID_HANDLE_VALUE)
+	{
+		errno = ENOENT;
+#else
+	dir->_d = _tinydir_opendir(path);
+	if (dir->_d == NULL)
+	{
+#endif
+		goto bail;
+	}
+
+	/* read first file */
+	dir->has_next = 1;
+#ifndef _MSC_VER
+#ifdef _TINYDIR_USE_READDIR
+	dir->_e = _tinydir_readdir(dir->_d);
+#else
+	/* allocate dirent buffer for readdir_r */
+	size = _tinydir_dirent_buf_size(dir->_d); /* conversion to int */
+	if (size == -1) return -1;
+	dir->_ep = (struct _tinydir_dirent*)_TINYDIR_MALLOC(size);
+	if (dir->_ep == NULL) return -1;
+
+	error = readdir_r(dir->_d, dir->_ep, &dir->_e);
+	if (error != 0) return -1;
+#endif
+	if (dir->_e == NULL)
+	{
+		dir->has_next = 0;
+	}
+#endif
+
+	return 0;
+
+bail:
+	tinydir_close(dir);
+	return -1;
+}
+
+_TINYDIR_FUNC
+int tinydir_open_sorted(tinydir_dir *dir, const _tinydir_char_t *path)
+{
+	/* Count the number of files first, to pre-allocate the files array */
+	size_t n_files = 0;
+	if (tinydir_open(dir, path) == -1)
+	{
+		return -1;
+	}
+	while (dir->has_next)
+	{
+		n_files++;
+		if (tinydir_next(dir) == -1)
+		{
+			goto bail;
+		}
+	}
+	tinydir_close(dir);
+
+	if (tinydir_open(dir, path) == -1)
+	{
+		return -1;
+	}
+
+	dir->n_files = 0;
+	dir->_files = (tinydir_file *)_TINYDIR_MALLOC(sizeof *dir->_files * n_files);
+	if (dir->_files == NULL)
+	{
+		goto bail;
+	}
+	while (dir->has_next)
+	{
+		tinydir_file *p_file;
+		dir->n_files++;
+
+		p_file = &dir->_files[dir->n_files - 1];
+		if (tinydir_readfile(dir, p_file) == -1)
+		{
+			goto bail;
+		}
+
+		if (tinydir_next(dir) == -1)
+		{
+			goto bail;
+		}
+
+		/* Just in case the number of files has changed between the first and
+		second reads, terminate without writing into unallocated memory */
+		if (dir->n_files == n_files)
+		{
+			break;
+		}
+	}
+
+	qsort(dir->_files, dir->n_files, sizeof(tinydir_file), _tinydir_file_cmp);
+
+	return 0;
+
+bail:
+	tinydir_close(dir);
+	return -1;
+}
+
+_TINYDIR_FUNC
+void tinydir_close(tinydir_dir *dir)
+{
+	if (dir == NULL)
+	{
+		return;
+	}
+
+	memset(dir->path, 0, sizeof(dir->path));
+	dir->has_next = 0;
+	dir->n_files = 0;
+	_TINYDIR_FREE(dir->_files);
+	dir->_files = NULL;
+#ifdef _MSC_VER
+	if (dir->_h != INVALID_HANDLE_VALUE)
+	{
+		FindClose(dir->_h);
+	}
+	dir->_h = INVALID_HANDLE_VALUE;
+#else
+	if (dir->_d)
+	{
+		_tinydir_closedir(dir->_d);
+	}
+	dir->_d = NULL;
+	dir->_e = NULL;
+#ifndef _TINYDIR_USE_READDIR
+	_TINYDIR_FREE(dir->_ep);
+	dir->_ep = NULL;
+#endif
+#endif
+}
+
+_TINYDIR_FUNC
+int tinydir_next(tinydir_dir *dir)
+{
+	if (dir == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+	if (!dir->has_next)
+	{
+		errno = ENOENT;
+		return -1;
+	}
+
+#ifdef _MSC_VER
+	if (FindNextFile(dir->_h, &dir->_f) == 0)
+#else
+#ifdef _TINYDIR_USE_READDIR
+	dir->_e = _tinydir_readdir(dir->_d);
+#else
+	if (dir->_ep == NULL)
+	{
+		return -1;
+	}
+	if (readdir_r(dir->_d, dir->_ep, &dir->_e) != 0)
+	{
+		return -1;
+	}
+#endif
+	if (dir->_e == NULL)
+#endif
+	{
+		dir->has_next = 0;
+#ifdef _MSC_VER
+		if (GetLastError() != ERROR_SUCCESS &&
+			GetLastError() != ERROR_NO_MORE_FILES)
+		{
+			tinydir_close(dir);
+			errno = EIO;
+			return -1;
+		}
+#endif
+	}
+
+	return 0;
+}
+
+_TINYDIR_FUNC
+int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file)
+{
+	if (dir == NULL || file == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+#ifdef _MSC_VER
+	if (dir->_h == INVALID_HANDLE_VALUE)
+#else
+	if (dir->_e == NULL)
+#endif
+	{
+		errno = ENOENT;
+		return -1;
+	}
+	if (_tinydir_strlen(dir->path) +
+		_tinydir_strlen(
+#ifdef _MSC_VER
+			dir->_f.cFileName
+#else
+			dir->_e->d_name
+#endif
+		) + 1 + _TINYDIR_PATH_EXTRA >=
+		_TINYDIR_PATH_MAX)
+	{
+		/* the path for the file will be too long */
+		errno = ENAMETOOLONG;
+		return -1;
+	}
+	if (_tinydir_strlen(
+#ifdef _MSC_VER
+			dir->_f.cFileName
+#else
+			dir->_e->d_name
+#endif
+		) >= _TINYDIR_FILENAME_MAX)
+	{
+		errno = ENAMETOOLONG;
+		return -1;
+	}
+
+	_tinydir_strcpy(file->path, dir->path);
+	_tinydir_strcat(file->path, TINYDIR_STRING("/"));
+	_tinydir_strcpy(file->name,
+#ifdef _MSC_VER
+		dir->_f.cFileName
+#else
+		dir->_e->d_name
+#endif
+	);
+	_tinydir_strcat(file->path, file->name);
+#ifndef _MSC_VER
+#ifdef __MINGW32__
+	if (_tstat(
+#else
+	if (stat(
+#endif
+		file->path, &file->_s) == -1)
+	{
+		return -1;
+	}
+#endif
+	_tinydir_get_ext(file);
+
+	file->is_dir =
+#ifdef _MSC_VER
+		!!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);
+#else
+		S_ISDIR(file->_s.st_mode);
+#endif
+	file->is_reg =
+#ifdef _MSC_VER
+		!!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) ||
+		(
+			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DEVICE) &&
+			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) &&
+			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_ENCRYPTED) &&
+#ifdef FILE_ATTRIBUTE_INTEGRITY_STREAM
+			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_INTEGRITY_STREAM) &&
+#endif
+#ifdef FILE_ATTRIBUTE_NO_SCRUB_DATA
+			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_NO_SCRUB_DATA) &&
+#endif
+			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_OFFLINE) &&
+			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_TEMPORARY));
+#else
+		S_ISREG(file->_s.st_mode);
+#endif
+
+	return 0;
+}
+
+_TINYDIR_FUNC
+int tinydir_readfile_n(const tinydir_dir *dir, tinydir_file *file, size_t i)
+{
+	if (dir == NULL || file == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+	if (i >= dir->n_files)
+	{
+		errno = ENOENT;
+		return -1;
+	}
+
+	memcpy(file, &dir->_files[i], sizeof(tinydir_file));
+	_tinydir_get_ext(file);
+
+	return 0;
+}
+
+_TINYDIR_FUNC
+int tinydir_open_subdir_n(tinydir_dir *dir, size_t i)
+{
+	_tinydir_char_t path[_TINYDIR_PATH_MAX];
+	if (dir == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+	if (i >= dir->n_files || !dir->_files[i].is_dir)
+	{
+		errno = ENOENT;
+		return -1;
+	}
+
+	_tinydir_strcpy(path, dir->_files[i].path);
+	tinydir_close(dir);
+	if (tinydir_open_sorted(dir, path) == -1)
+	{
+		return -1;
+	}
+
+	return 0;
+}
+
+/* Open a single file given its path */
+_TINYDIR_FUNC
+int tinydir_file_open(tinydir_file *file, const _tinydir_char_t *path)
+{
+	tinydir_dir dir;
+	int result = 0;
+	int found = 0;
+	_tinydir_char_t dir_name_buf[_TINYDIR_PATH_MAX];
+	_tinydir_char_t file_name_buf[_TINYDIR_FILENAME_MAX];
+	_tinydir_char_t *dir_name;
+	_tinydir_char_t *base_name;
+#if (defined _MSC_VER || defined __MINGW32__)
+	_tinydir_char_t drive_buf[_TINYDIR_PATH_MAX];
+	_tinydir_char_t ext_buf[_TINYDIR_FILENAME_MAX];
+#endif
+
+	if (file == NULL || path == NULL || _tinydir_strlen(path) == 0)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+	if (_tinydir_strlen(path) + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX)
+	{
+		errno = ENAMETOOLONG;
+		return -1;
+	}
+
+	/* Get the parent path */
+#if (defined _MSC_VER || defined __MINGW32__)
+#if ((defined _MSC_VER) && (_MSC_VER >= 1400))
+		_tsplitpath_s(
+			path,
+			drive_buf, _TINYDIR_DRIVE_MAX,
+			dir_name_buf, _TINYDIR_FILENAME_MAX,
+			file_name_buf, _TINYDIR_FILENAME_MAX,
+			ext_buf, _TINYDIR_FILENAME_MAX);
+#else
+		_tsplitpath(
+			path,
+			drive_buf,
+			dir_name_buf,
+			file_name_buf,
+			ext_buf);
+#endif
+
+/* _splitpath_s not work fine with only filename and widechar support */
+#ifdef _UNICODE
+		if (drive_buf[0] == L'\xFEFE')
+			drive_buf[0] = '\0';
+		if (dir_name_buf[0] == L'\xFEFE')
+			dir_name_buf[0] = '\0';
+#endif
+
+	if (errno)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+	/* Emulate the behavior of dirname by returning "." for dir name if it's
+	empty */
+	if (drive_buf[0] == '\0' && dir_name_buf[0] == '\0')
+	{
+		_tinydir_strcpy(dir_name_buf, TINYDIR_STRING("."));
+	}
+	/* Concatenate the drive letter and dir name to form full dir name */
+	_tinydir_strcat(drive_buf, dir_name_buf);
+	dir_name = drive_buf;
+	/* Concatenate the file name and extension to form base name */
+	_tinydir_strcat(file_name_buf, ext_buf);
+	base_name = file_name_buf;
+#else
+	_tinydir_strcpy(dir_name_buf, path);
+	dir_name = dirname(dir_name_buf);
+	_tinydir_strcpy(file_name_buf, path);
+	base_name =basename(file_name_buf);
+#endif
+
+	/* Open the parent directory */
+	if (tinydir_open(&dir, dir_name) == -1)
+	{
+		return -1;
+	}
+
+	/* Read through the parent directory and look for the file */
+	while (dir.has_next)
+	{
+		if (tinydir_readfile(&dir, file) == -1)
+		{
+			result = -1;
+			goto bail;
+		}
+		if (_tinydir_strcmp(file->name, base_name) == 0)
+		{
+			/* File found */
+			found = 1;
+			break;
+		}
+		tinydir_next(&dir);
+	}
+	if (!found)
+	{
+		result = -1;
+		errno = ENOENT;
+	}
+
+bail:
+	tinydir_close(&dir);
+	return result;
+}
+
+_TINYDIR_FUNC
+void _tinydir_get_ext(tinydir_file *file)
+{
+	_tinydir_char_t *period = _tinydir_strrchr(file->name, TINYDIR_STRING('.'));
+	if (period == NULL)
+	{
+		file->extension = &(file->name[_tinydir_strlen(file->name)]);
+	}
+	else
+	{
+		file->extension = period + 1;
+	}
+}
+
+_TINYDIR_FUNC
+int _tinydir_file_cmp(const void *a, const void *b)
+{
+	const tinydir_file *fa = (const tinydir_file *)a;
+	const tinydir_file *fb = (const tinydir_file *)b;
+	if (fa->is_dir != fb->is_dir)
+	{
+		return -(fa->is_dir - fb->is_dir);
+	}
+	return _tinydir_strncmp(fa->name, fb->name, _TINYDIR_FILENAME_MAX);
+}
+
+#ifndef _MSC_VER
+#ifndef _TINYDIR_USE_READDIR
+/*
+The following authored by Ben Hutchings <ben@decadent.org.uk>
+from https://womble.decadent.org.uk/readdir_r-advisory.html
+*/
+/* Calculate the required buffer size (in bytes) for directory      *
+* entries read from the given directory handle.  Return -1 if this  *
+* this cannot be done.                                              *
+*                                                                   *
+* This code does not trust values of NAME_MAX that are less than    *
+* 255, since some systems (including at least HP-UX) incorrectly    *
+* define it to be a smaller value.                                  */
+_TINYDIR_FUNC
+size_t _tinydir_dirent_buf_size(_TINYDIR_DIR *dirp)
+{
+	long name_max;
+	size_t name_end;
+	/* parameter may be unused */
+	(void)dirp;
+
+#if defined _TINYDIR_USE_FPATHCONF
+	name_max = fpathconf(dirfd(dirp), _PC_NAME_MAX);
+	if (name_max == -1)
+#if defined(NAME_MAX)
+		name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
+#else
+		return (size_t)(-1);
+#endif
+#elif defined(NAME_MAX)
+ 	name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
+#else
+#error "buffer size for readdir_r cannot be determined"
+#endif
+	name_end = (size_t)offsetof(struct _tinydir_dirent, d_name) + name_max + 1;
+	return (name_end > sizeof(struct _tinydir_dirent) ?
+		name_end : sizeof(struct _tinydir_dirent));
+}
+#endif
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+# if defined (_MSC_VER)
+# pragma warning(pop)
+# endif
+
+#endif
--- a/compat/zlib/contrib/minizip/unzip.c
+++ b/compat/zlib/contrib/minizip/unzip.c
@@ -200,7 +200,7 @@ typedef struct
 /* ===========================================================================
     Read a byte from a gz_stream; update next_in and avail_in. Return EOF
   for end of file.
-   IN assertion: the stream s has been sucessfully opened for reading.
+   IN assertion: the stream s has been successfully opened for reading.
 */


--- a/compat/zlib/contrib/minizip/zip.c
+++ b/compat/zlib/contrib/minizip/zip.c
@@ -15,7 +15,7 @@
   Oct-2009 - Mathias Svensson - Did some code cleanup and refactoring to get better overview of some functions.
   Oct-2009 - Mathias Svensson - Added zipRemoveExtraInfoBlock to strip extra field data from its ZIP64 data
                                 It is used when recreting zip archive with RAW when deleting items from a zip.
-                                 ZIP64 data is automaticly added to items that needs it, and existing ZIP64 data need to be removed.
+                                 ZIP64 data is automatically added to items that needs it, and existing ZIP64 data need to be removed.
   Oct-2009 - Mathias Svensson - Added support for BZIP2 as compression mode (bzip2 lib is required)
   Jan-2010 - back to unzip and minizip 1.0 name scheme, with compatibility layer

@@ -116,7 +116,7 @@ typedef struct linkedlist_datablock_internal_s
  struct linkedlist_datablock_internal_s* next_datablock;
  uLong  avail_in_this_block;
  uLong  filled_in_this_block;
-  uLong  unused; /* for future use and alignement */
+  uLong  unused; /* for future use and alignment */
  unsigned char data[SIZEDATA_INDATABLOCK];
 } linkedlist_datablock_internal;

@@ -171,7 +171,7 @@ typedef struct
    curfile64_info ci;            /* info on the file curretly writing */

    ZPOS64_T begin_pos;            /* position of the beginning of the zipfile */
-    ZPOS64_T add_position_when_writting_offset;
+    ZPOS64_T add_position_when_writing_offset;
    ZPOS64_T number_entry;

 #ifndef NO_ADDFILEINEXISTINGZIP
@@ -807,7 +807,7 @@ int LoadCentralDirectoryRecord(zip64_internal* pziinit)
  }

  byte_before_the_zipfile = central_pos - (offset_central_dir+size_central_dir);
-  pziinit->add_position_when_writting_offset = byte_before_the_zipfile;
+  pziinit->add_position_when_writing_offset = byte_before_the_zipfile;

  {
    ZPOS64_T size_central_dir_to_read = size_central_dir;
@@ -875,7 +875,7 @@ extern zipFile ZEXPORT zipOpen3 (const void *pathname, int append, zipcharpc* gl
    ziinit.in_opened_file_inzip = 0;
    ziinit.ci.stream_initialised = 0;
    ziinit.number_entry = 0;
-    ziinit.add_position_when_writting_offset = 0;
+    ziinit.add_position_when_writing_offset = 0;
    init_linkedlist(&(ziinit.central_dir));


@@ -1164,7 +1164,7 @@ extern int ZEXPORT zipOpenNewFileInZip4_64 (zipFile file, const char* filename,
    if(zi->ci.pos_local_header >= 0xffffffff)
      zip64local_putValue_inmemory(zi->ci.central_header+42,(uLong)0xffffffff,4);
    else
-      zip64local_putValue_inmemory(zi->ci.central_header+42,(uLong)zi->ci.pos_local_header - zi->add_position_when_writting_offset,4);
+      zip64local_putValue_inmemory(zi->ci.central_header+42,(uLong)zi->ci.pos_local_header - zi->add_position_when_writing_offset,4);

    for (i=0;i<size_filename;i++)
        *(zi->ci.central_header+SIZECENTRALHEADER+i) = *(filename+i);
@@ -1755,7 +1755,7 @@ extern int ZEXPORT zipCloseFileInZip (zipFile file)
 int Write_Zip64EndOfCentralDirectoryLocator(zip64_internal* zi, ZPOS64_T zip64eocd_pos_inzip)
 {
  int err = ZIP_OK;
-  ZPOS64_T pos = zip64eocd_pos_inzip - zi->add_position_when_writting_offset;
+  ZPOS64_T pos = zip64eocd_pos_inzip - zi->add_position_when_writing_offset;

  err = zip64local_putValue(&zi->z_filefunc,zi->filestream,(uLong)ZIP64ENDLOCHEADERMAGIC,4);

@@ -1808,7 +1808,7 @@ int Write_Zip64EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centra

  if (err==ZIP_OK) /* offset of start of central directory with respect to the starting disk number */
  {
-    ZPOS64_T pos = centraldir_pos_inzip - zi->add_position_when_writting_offset;
+    ZPOS64_T pos = centraldir_pos_inzip - zi->add_position_when_writing_offset;
    err = zip64local_putValue(&zi->z_filefunc,zi->filestream, (ZPOS64_T)pos,8);
  }
  return err;
@@ -1849,13 +1849,13 @@ int Write_EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir,

  if (err==ZIP_OK) /* offset of start of central directory with respect to the starting disk number */
  {
-    ZPOS64_T pos = centraldir_pos_inzip - zi->add_position_when_writting_offset;
+    ZPOS64_T pos = centraldir_pos_inzip - zi->add_position_when_writing_offset;
    if(pos >= 0xffffffff)
    {
      err = zip64local_putValue(&zi->z_filefunc,zi->filestream, (uLong)0xffffffff,4);
    }
    else
-      err = zip64local_putValue(&zi->z_filefunc,zi->filestream, (uLong)(centraldir_pos_inzip - zi->add_position_when_writting_offset),4);
+      err = zip64local_putValue(&zi->z_filefunc,zi->filestream, (uLong)(centraldir_pos_inzip - zi->add_position_when_writing_offset),4);
  }

   return err;
@@ -1921,7 +1921,7 @@ extern int ZEXPORT zipClose (zipFile file, const char* global_comment)
    }
    free_linkedlist(&(zi->central_dir));

-    pos = centraldir_pos_inzip - zi->add_position_when_writting_offset;
+    pos = centraldir_pos_inzip - zi->add_position_when_writing_offset;
    if(pos >= 0xffffffff || zi->number_entry > 0xFFFF)
    {
      ZPOS64_T Zip64EOCDpos = ZTELL64(zi->z_filefunc,zi->filestream);
--- a/compat/zlib/contrib/pascal/zlibpas.pas
+++ b/compat/zlib/contrib/pascal/zlibpas.pas
@@ -10,8 +10,8 @@ unit zlibpas;
 interface

 const
-  ZLIB_VERSION = '1.2.8';
-  ZLIB_VERNUM  = $1280;
+  ZLIB_VERSION = '1.2.11';
+  ZLIB_VERNUM  = $12a0;

 type
  alloc_func = function(opaque: Pointer; items, size: Integer): Pointer;
--- a/compat/zlib/contrib/puff/puff.c
+++ b/compat/zlib/contrib/puff/puff.c
@@ -17,7 +17,7 @@
 * All dynamically allocated memory comes from the stack.  The stack required
 * is less than 2K bytes.  This code is compatible with 16-bit int's and
 * assumes that long's are at least 32 bits.  puff.c uses the short data type,
- * assumed to be 16 bits, for arrays in order to to conserve memory.  The code
+ * assumed to be 16 bits, for arrays in order to conserve memory.  The code
 * works whether integers are stored big endian or little endian.
 *
 * In the comments below are "Format notes" that describe the inflate process
--- a/compat/zlib/contrib/vstudio/readme.txt
+++ b/compat/zlib/contrib/vstudio/readme.txt
@@ -1,4 +1,4 @@
-Building instructions for the DLL versions of Zlib 1.2.8
+Building instructions for the DLL versions of Zlib 1.2.11
 ========================================================

 This directory contains projects that build zlib and minizip using
@@ -16,7 +16,7 @@ More information can be found at this site.

 Build instructions for Visual Studio 2008 (32 bits or 64 bits)
 --------------------------------------------------------------
- Uncompress current zlib, including all contrib/* files
+- Decompress current zlib, including all contrib/* files
 - Compile assembly code (with Visual Studio Command Prompt) by running:
   bld_ml64.bat (in contrib\masmx64)
   bld_ml32.bat (in contrib\masmx86)
@@ -25,14 +25,24 @@ Build instructions for Visual Studio 2008 (32 bits or 64 bits)

 Build instructions for Visual Studio 2010 (32 bits or 64 bits)
 --------------------------------------------------------------
- Uncompress current zlib, including all contrib/* files
+- Decompress current zlib, including all contrib/* files
 - Open contrib\vstudio\vc10\zlibvc.sln with Microsoft Visual C++ 2010

 Build instructions for Visual Studio 2012 (32 bits or 64 bits)
 --------------------------------------------------------------
- Uncompress current zlib, including all contrib/* files
+- Decompress current zlib, including all contrib/* files
 - Open contrib\vstudio\vc11\zlibvc.sln with Microsoft Visual C++ 2012

+Build instructions for Visual Studio 2013 (32 bits or 64 bits)
+--------------------------------------------------------------
+- Decompress current zlib, including all contrib/* files
+- Open contrib\vstudio\vc12\zlibvc.sln with Microsoft Visual C++ 2013
+
+Build instructions for Visual Studio 2015 (32 bits or 64 bits)
+--------------------------------------------------------------
+- Decompress current zlib, including all contrib/* files
+- Open contrib\vstudio\vc14\zlibvc.sln with Microsoft Visual C++ 2015
+

 Important
 ---------
@@ -63,3 +73,6 @@ Additional notes

 Gilles Vollant
 info@winimage.com
+
+Visual Studio 2013 and 2015 Projects from Sean Hunt
+seandhunt_7@yahoo.com
--- a/compat/zlib/contrib/vstudio/vc10/zlib.rc
+++ b/compat/zlib/contrib/vstudio/vc10/zlib.rc
@@ -2,8 +2,8 @@

 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1,2,8,0
-  PRODUCTVERSION 1,2,8,0
+  FILEVERSION	 1, 2, 11, 0
+  PRODUCTVERSION 1, 2, 11, 0
  FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
  FILEFLAGS	0
  FILEOS	VOS_DOS_WINDOWS32
@@ -17,12 +17,12 @@ BEGIN

    BEGIN
      VALUE "FileDescription", "zlib data compression and ZIP file I/O library\0"
-      VALUE "FileVersion",	"1.2.8\0"
+      VALUE "FileVersion",	"1.2.11\0"
      VALUE "InternalName",	"zlib\0"
      VALUE "OriginalFilename",	"zlibwapi.dll\0"
      VALUE "ProductName",	"ZLib.DLL\0"
      VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
-      VALUE "LegalCopyright", "(C) 1995-2013 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright", "(C) 1995-2017 Jean-loup Gailly & Mark Adler\0"
    END
  END
  BLOCK "VarFileInfo"
--- a/compat/zlib/contrib/vstudio/vc10/zlibvc.def
+++ b/compat/zlib/contrib/vstudio/vc10/zlibvc.def
@@ -1,7 +1,7 @@
 LIBRARY
 ; zlib data compression and ZIP file I/O library

-VERSION		1.2.8
+VERSION		1.2

 EXPORTS
        adler32                                  @1
@@ -141,3 +141,13 @@ EXPORTS
 ; zlib1 v1.2.8 added:
        inflateGetDictionary                    @166
        gzvprintf                               @167
+
+; zlib1 v1.2.9 added:
+        inflateCodesUsed                        @168
+        inflateValidate                         @169
+        uncompress2                             @170
+        gzfread                                 @171
+        gzfwrite                                @172
+        deflateGetDictionary                    @173
+        adler32_z                               @174
+        crc32_z                                 @175
--- a/compat/zlib/contrib/vstudio/vc10/zlibvc.sln
+++ b/compat/zlib/contrib/vstudio/vc10/zlibvc.sln
@@ -1,4 +1,4 @@
-
+
 Microsoft Visual Studio Solution File, Format Version 11.00
 # Visual Studio 2010
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "zlibvc", "zlibvc.vcxproj", "{8FD826F8-3739-44E6-8CC8-997122E53B8D}"
--- a/compat/zlib/contrib/vstudio/vc11/zlib.rc
+++ b/compat/zlib/contrib/vstudio/vc11/zlib.rc
@@ -2,8 +2,8 @@

 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1,2,8,0
-  PRODUCTVERSION 1,2,8,0
+  FILEVERSION	 1, 2, 11, 0
+  PRODUCTVERSION 1, 2, 11, 0
  FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
  FILEFLAGS	0
  FILEOS	VOS_DOS_WINDOWS32
@@ -17,12 +17,12 @@ BEGIN

    BEGIN
      VALUE "FileDescription", "zlib data compression and ZIP file I/O library\0"
-      VALUE "FileVersion",	"1.2.8\0"
+      VALUE "FileVersion",	"1.2.11\0"
      VALUE "InternalName",	"zlib\0"
      VALUE "OriginalFilename",	"zlibwapi.dll\0"
      VALUE "ProductName",	"ZLib.DLL\0"
      VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
-      VALUE "LegalCopyright", "(C) 1995-2013 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright", "(C) 1995-2017 Jean-loup Gailly & Mark Adler\0"
    END
  END
  BLOCK "VarFileInfo"
--- a/compat/zlib/contrib/vstudio/vc11/zlibvc.def
+++ b/compat/zlib/contrib/vstudio/vc11/zlibvc.def
@@ -1,7 +1,7 @@
 LIBRARY
 ; zlib data compression and ZIP file I/O library

-VERSION		1.2.8
+VERSION		1.2

 EXPORTS
        adler32                                  @1
@@ -141,3 +141,13 @@ EXPORTS
 ; zlib1 v1.2.8 added:
        inflateGetDictionary                    @166
        gzvprintf                               @167
+
+; zlib1 v1.2.9 added:
+        inflateCodesUsed                        @168
+        inflateValidate                         @169
+        uncompress2                             @170
+        gzfread                                 @171
+        gzfwrite                                @172
+        deflateGetDictionary                    @173
+        adler32_z                               @174
+        crc32_z                                 @175
--- a/compat/zlib/contrib/vstudio/vc11/zlibvc.sln
+++ b/compat/zlib/contrib/vstudio/vc11/zlibvc.sln
@@ -1,4 +1,4 @@
-
+
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 2012
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "zlibvc", "zlibvc.vcxproj", "{8FD826F8-3739-44E6-8CC8-997122E53B8D}"
--- a/compat/zlib/contrib/vstudio/vc12/miniunz.vcxproj
+++ b/compat/zlib/contrib/vstudio/vc12/miniunz.vcxproj
@@ -0,0 +1,316 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Itanium">
+      <Configuration>Debug</Configuration>
+      <Platform>Itanium</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Itanium">
+      <Configuration>Release</Configuration>
+      <Platform>Itanium</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{C52F9E7B-498A-42BE-8DB4-85A15694382A}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <CharacterSet>MultiByte</CharacterSet>
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <CharacterSet>MultiByte</CharacterSet>
+    <PlatformToolset>v120</PlatformToolset>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Itanium'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <CharacterSet>MultiByte</CharacterSet>
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <CharacterSet>MultiByte</CharacterSet>
+    <PlatformToolset>v120</PlatformToolset>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <CharacterSet>MultiByte</CharacterSet>
+    <PlatformToolset>v120</PlatformToolset>
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+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
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+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
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+  <PropertyGroup Label="UserMacros" />
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+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</LinkIncremental>
+    <GenerateManifest Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">false</GenerateManifest>
+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">x86\MiniUnzip$(Configuration)\</OutDir>
+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">x86\MiniUnzip$(Configuration)\Tmp\</IntDir>
+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">false</LinkIncremental>
+    <GenerateManifest Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">false</GenerateManifest>
+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">x64\MiniUnzip$(Configuration)\</OutDir>
+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">x64\MiniUnzip$(Configuration)\Tmp\</IntDir>
+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</LinkIncremental>
+    <GenerateManifest Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">false</GenerateManifest>
+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Debug|Itanium'">ia64\MiniUnzip$(Configuration)\</OutDir>
+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Debug|Itanium'">ia64\MiniUnzip$(Configuration)\Tmp\</IntDir>
+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Debug|Itanium'">true</LinkIncremental>
+    <GenerateManifest Condition="'$(Configuration)|$(Platform)'=='Debug|Itanium'">false</GenerateManifest>
+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Release|x64'">x64\MiniUnzip$(Configuration)\</OutDir>
+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Release|x64'">x64\MiniUnzip$(Configuration)\Tmp\</IntDir>
+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</LinkIncremental>
+    <GenerateManifest Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</GenerateManifest>
+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">ia64\MiniUnzip$(Configuration)\</OutDir>
+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">ia64\MiniUnzip$(Configuration)\Tmp\</IntDir>
+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">false</LinkIncremental>
+    <GenerateManifest Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">false</GenerateManifest>
+    <CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Debug|Itanium'">AllRules.ruleset</CodeAnalysisRuleSet>
+    <CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Debug|Itanium'" />
+    <CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Debug|Itanium'" />
+    <CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">AllRules.ruleset</CodeAnalysisRuleSet>
+    <CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" />
+    <CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" />
+    <CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">AllRules.ruleset</CodeAnalysisRuleSet>
+    <CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" />
+    <CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" />
+    <CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">AllRules.ruleset</CodeAnalysisRuleSet>
+    <CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'" />
+    <CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'" />
+    <CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">AllRules.ruleset</CodeAnalysisRuleSet>
+    <CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" />
+    <CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" />
+    <CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Release|x64'">AllRules.ruleset</CodeAnalysisRuleSet>
+    <CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Release|x64'" />
+    <CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Release|x64'" />
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <Optimization>Disabled</Optimization>
+      <AdditionalIncludeDirectories>..\..\..;..\..\minizip;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_DEPRECATE;ZLIB_WINAPI;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <MinimalRebuild>true</MinimalRebuild>
+      <BasicRuntimeChecks>Default</BasicRuntimeChecks>
+      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
+      <WarningLevel>Level3</WarningLevel>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+    </ClCompile>
+    <Link>
+      <AdditionalDependencies>x86\ZlibDllDebug\zlibwapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <OutputFile>$(OutDir)miniunz.exe</OutputFile>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <ProgramDatabaseFile>$(OutDir)miniunz.pdb</ProgramDatabaseFile>
+      <SubSystem>Console</SubSystem>
+      <RandomizedBaseAddress>false</RandomizedBaseAddress>
+      <DataExecutionPrevention>
+      </DataExecutionPrevention>
+      <TargetMachine>MachineX86</TargetMachine>
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+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <Optimization>MaxSpeed</Optimization>
+      <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
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+      <PreprocessorDefinitions>WIN32;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_DEPRECATE;ZLIB_WINAPI;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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+      <BasicRuntimeChecks>Default</BasicRuntimeChecks>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
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+      <AdditionalDependencies>x86\ZlibDllRelease\zlibwapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <OutputFile>$(OutDir)miniunz.exe</OutputFile>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
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+      <BasicRuntimeChecks>Default</BasicRuntimeChecks>
+      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
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+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
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+    <Link>
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+      <OutputFile>$(OutDir)miniunz.exe</OutputFile>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
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+    <Link>
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+      <OutputFile>$(OutDir)miniunz.exe</OutputFile>
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+      <ProgramDatabaseFile>$(OutDir)miniunz.pdb</ProgramDatabaseFile>
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+      <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
+      <OmitFramePointers>true</OmitFramePointers>
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+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
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+      <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
+      <OmitFramePointers>true</OmitFramePointers>
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+      <PreprocessorDefinitions>_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_DEPRECATE;ZLIB_WINAPI;NDEBUG;_CONSOLE;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <StringPooling>true</StringPooling>
+      <BasicRuntimeChecks>Default</BasicRuntimeChecks>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
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+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
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+    <Link>
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+      <OutputFile>$(OutDir)miniunz.exe</OutputFile>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <SubSystem>Console</SubSystem>
+      <OptimizeReferences>true</OptimizeReferences>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <TargetMachine>MachineIA64</TargetMachine>
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+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\minizip\miniunz.c" />
+  </ItemGroup>
+  <ItemGroup>
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+      <Project>{8fd826f8-3739-44e6-8cc8-997122e53b8d}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
--- a/compat/zlib/contrib/vstudio/vc12/minizip.vcxproj
+++ b/compat/zlib/contrib/vstudio/vc12/minizip.vcxproj
@@ -0,0 +1,313 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Itanium">
+      <Configuration>Debug</Configuration>
+      <Platform>Itanium</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
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+      <OutputFile>$(OutDir)testzlibdll.exe</OutputFile>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <ProgramDatabaseFile>$(OutDir)testzlib.pdb</ProgramDatabaseFile>
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+      <OutputFile>$(OutDir)testzlibdll.exe</OutputFile>
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+      <FunctionLevelLinking>true</FunctionLevelLinking>
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+      <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
+      <OmitFramePointers>true</OmitFramePointers>
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+      <PreprocessorDefinitions>_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_DEPRECATE;ZLIB_WINAPI;NDEBUG;_CONSOLE;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <StringPooling>true</StringPooling>
+      <BasicRuntimeChecks>Default</BasicRuntimeChecks>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
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+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
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+    <Link>
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+      <OutputFile>$(OutDir)testzlibdll.exe</OutputFile>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <SubSystem>Console</SubSystem>
+      <OptimizeReferences>true</OptimizeReferences>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <TargetMachine>MachineIA64</TargetMachine>
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+  <ItemGroup>
+    <ClCompile Include="..\..\testzlib\testzlib.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="zlibvc.vcxproj">
+      <Project>{8fd826f8-3739-44e6-8cc8-997122e53b8d}</Project>
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+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
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+</Project>
--- a/compat/zlib/contrib/vstudio/vc12/zlib.rc
+++ b/compat/zlib/contrib/vstudio/vc12/zlib.rc
@@ -0,0 +1,32 @@
+#include <windows.h>
+
+#define IDR_VERSION1  1
+IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
+  FILEVERSION	 1, 2, 11, 0
+  PRODUCTVERSION 1, 2, 11, 0
+  FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
+  FILEFLAGS	0
+  FILEOS	VOS_DOS_WINDOWS32
+  FILETYPE	VFT_DLL
+  FILESUBTYPE	0	// not used
+BEGIN
+  BLOCK "StringFileInfo"
+  BEGIN
+    BLOCK "040904E4"
+    //language ID = U.S. English, char set = Windows, Multilingual
+
+    BEGIN
+      VALUE "FileDescription", "zlib data compression and ZIP file I/O library\0"
+      VALUE "FileVersion",	"1.2.11\0"
+      VALUE "InternalName",	"zlib\0"
+      VALUE "OriginalFilename",	"zlibwapi.dll\0"
+      VALUE "ProductName",	"ZLib.DLL\0"
+      VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
+      VALUE "LegalCopyright", "(C) 1995-2017 Jean-loup Gailly & Mark Adler\0"
+    END
+  END
+  BLOCK "VarFileInfo"
+  BEGIN
+    VALUE "Translation", 0x0409, 1252
+  END
+END
--- a/compat/zlib/contrib/vstudio/vc12/zlibstat.vcxproj
+++ b/compat/zlib/contrib/vstudio/vc12/zlibstat.vcxproj
@@ -0,0 +1,467 @@
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+    <ProjectConfiguration Include="Debug|x64">
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+      <Platform>x64</Platform>
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+      <Platform>Itanium</Platform>
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+      <Configuration>ReleaseWithoutAsm</Configuration>
+      <Platform>Win32</Platform>
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+      <Configuration>ReleaseWithoutAsm</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Itanium">
+      <Configuration>Release</Configuration>
+      <Platform>Itanium</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
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+  </ItemGroup>
+  <PropertyGroup Label="Globals">
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+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|Win32'">
+    <ClCompile>
+      <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
+      <AdditionalIncludeDirectories>..\..\..;..\..\masmx86;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;ZLIB_WINAPI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <StringPooling>true</StringPooling>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeaderOutputFile>$(IntDir)zlibstat.pch</PrecompiledHeaderOutputFile>
+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
+      <ObjectFileName>$(IntDir)</ObjectFileName>
+      <ProgramDataBaseFileName>$(OutDir)</ProgramDataBaseFileName>
+      <WarningLevel>Level3</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </ClCompile>
+    <ResourceCompile>
+      <Culture>0x040c</Culture>
+    </ResourceCompile>
+    <Lib>
+      <AdditionalOptions>/MACHINE:X86 /NODEFAULTLIB %(AdditionalOptions)</AdditionalOptions>
+      <OutputFile>$(OutDir)zlibstat.lib</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </Lib>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Midl>
+      <TargetEnvironment>X64</TargetEnvironment>
+    </Midl>
+    <ClCompile>
+      <Optimization>Disabled</Optimization>
+      <AdditionalIncludeDirectories>..\..\..;..\..\masmx86;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>ZLIB_WINAPI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_WARNINGS;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <PrecompiledHeaderOutputFile>$(IntDir)zlibstat.pch</PrecompiledHeaderOutputFile>
+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
+      <ObjectFileName>$(IntDir)</ObjectFileName>
+      <ProgramDataBaseFileName>$(OutDir)</ProgramDataBaseFileName>
+      <WarningLevel>Level3</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <DebugInformationFormat>OldStyle</DebugInformationFormat>
+    </ClCompile>
+    <ResourceCompile>
+      <Culture>0x040c</Culture>
+    </ResourceCompile>
+    <Lib>
+      <AdditionalOptions>/MACHINE:AMD64 /NODEFAULTLIB %(AdditionalOptions)</AdditionalOptions>
+      <OutputFile>$(OutDir)zlibstat.lib</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </Lib>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Itanium'">
+    <Midl>
+      <TargetEnvironment>Itanium</TargetEnvironment>
+    </Midl>
+    <ClCompile>
+      <Optimization>Disabled</Optimization>
+      <AdditionalIncludeDirectories>..\..\..;..\..\masmx86;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>ZLIB_WINAPI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_WARNINGS;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <PrecompiledHeaderOutputFile>$(IntDir)zlibstat.pch</PrecompiledHeaderOutputFile>
+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
+      <ObjectFileName>$(IntDir)</ObjectFileName>
+      <ProgramDataBaseFileName>$(OutDir)</ProgramDataBaseFileName>
+      <WarningLevel>Level3</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <DebugInformationFormat>OldStyle</DebugInformationFormat>
+    </ClCompile>
+    <ResourceCompile>
+      <Culture>0x040c</Culture>
+    </ResourceCompile>
+    <Lib>
+      <AdditionalOptions>/MACHINE:IA64 /NODEFAULTLIB %(AdditionalOptions)</AdditionalOptions>
+      <OutputFile>$(OutDir)zlibstat.lib</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </Lib>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Midl>
+      <TargetEnvironment>X64</TargetEnvironment>
+    </Midl>
+    <ClCompile>
+      <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
+      <AdditionalIncludeDirectories>..\..\..;..\..\masmx86;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>ZLIB_WINAPI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_WARNINGS;ASMV;ASMINF;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <StringPooling>true</StringPooling>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeaderOutputFile>$(IntDir)zlibstat.pch</PrecompiledHeaderOutputFile>
+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
+      <ObjectFileName>$(IntDir)</ObjectFileName>
+      <ProgramDataBaseFileName>$(OutDir)</ProgramDataBaseFileName>
+      <WarningLevel>Level3</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </ClCompile>
+    <ResourceCompile>
+      <Culture>0x040c</Culture>
+    </ResourceCompile>
+    <Lib>
+      <AdditionalOptions>/MACHINE:AMD64 /NODEFAULTLIB %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalDependencies>..\..\masmx64\gvmat64.obj;..\..\masmx64\inffasx64.obj;%(AdditionalDependencies)</AdditionalDependencies>
+      <OutputFile>$(OutDir)zlibstat.lib</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </Lib>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">
+    <Midl>
+      <TargetEnvironment>Itanium</TargetEnvironment>
+    </Midl>
+    <ClCompile>
+      <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
+      <AdditionalIncludeDirectories>..\..\..;..\..\masmx86;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>ZLIB_WINAPI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_WARNINGS;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <StringPooling>true</StringPooling>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeaderOutputFile>$(IntDir)zlibstat.pch</PrecompiledHeaderOutputFile>
+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
+      <ObjectFileName>$(IntDir)</ObjectFileName>
+      <ProgramDataBaseFileName>$(OutDir)</ProgramDataBaseFileName>
+      <WarningLevel>Level3</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </ClCompile>
+    <ResourceCompile>
+      <Culture>0x040c</Culture>
+    </ResourceCompile>
+    <Lib>
+      <AdditionalOptions>/MACHINE:IA64 /NODEFAULTLIB %(AdditionalOptions)</AdditionalOptions>
+      <OutputFile>$(OutDir)zlibstat.lib</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </Lib>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|x64'">
+    <Midl>
+      <TargetEnvironment>X64</TargetEnvironment>
+    </Midl>
+    <ClCompile>
+      <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
+      <AdditionalIncludeDirectories>..\..\..;..\..\masmx86;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>ZLIB_WINAPI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_WARNINGS;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <StringPooling>true</StringPooling>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeaderOutputFile>$(IntDir)zlibstat.pch</PrecompiledHeaderOutputFile>
+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
+      <ObjectFileName>$(IntDir)</ObjectFileName>
+      <ProgramDataBaseFileName>$(OutDir)</ProgramDataBaseFileName>
+      <WarningLevel>Level3</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </ClCompile>
+    <ResourceCompile>
+      <Culture>0x040c</Culture>
+    </ResourceCompile>
+    <Lib>
+      <AdditionalOptions>/MACHINE:AMD64 /NODEFAULTLIB %(AdditionalOptions)</AdditionalOptions>
+      <OutputFile>$(OutDir)zlibstat.lib</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </Lib>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|Itanium'">
+    <Midl>
+      <TargetEnvironment>Itanium</TargetEnvironment>
+    </Midl>
+    <ClCompile>
+      <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
+      <AdditionalIncludeDirectories>..\..\..;..\..\masmx86;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>ZLIB_WINAPI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_WARNINGS;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <StringPooling>true</StringPooling>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeaderOutputFile>$(IntDir)zlibstat.pch</PrecompiledHeaderOutputFile>
+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
+      <ObjectFileName>$(IntDir)</ObjectFileName>
+      <ProgramDataBaseFileName>$(OutDir)</ProgramDataBaseFileName>
+      <WarningLevel>Level3</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </ClCompile>
+    <ResourceCompile>
+      <Culture>0x040c</Culture>
+    </ResourceCompile>
+    <Lib>
+      <AdditionalOptions>/MACHINE:IA64 /NODEFAULTLIB %(AdditionalOptions)</AdditionalOptions>
+      <OutputFile>$(OutDir)zlibstat.lib</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </Lib>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\..\adler32.c" />
+    <ClCompile Include="..\..\..\compress.c" />
+    <ClCompile Include="..\..\..\crc32.c" />
+    <ClCompile Include="..\..\..\deflate.c" />
+    <ClCompile Include="..\..\..\gzclose.c" />
+    <ClCompile Include="..\..\..\gzlib.c" />
+    <ClCompile Include="..\..\..\gzread.c" />
+    <ClCompile Include="..\..\..\gzwrite.c" />
+    <ClCompile Include="..\..\..\infback.c" />
+    <ClCompile Include="..\..\masmx64\inffas8664.c">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Itanium'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|Itanium'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\inffast.c" />
+    <ClCompile Include="..\..\..\inflate.c" />
+    <ClCompile Include="..\..\..\inftrees.c" />
+    <ClCompile Include="..\..\minizip\ioapi.c" />
+    <ClCompile Include="..\..\..\trees.c" />
+    <ClCompile Include="..\..\..\uncompr.c" />
+    <ClCompile Include="..\..\minizip\unzip.c" />
+    <ClCompile Include="..\..\minizip\zip.c" />
+    <ClCompile Include="..\..\..\zutil.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="zlib.rc" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="zlibvc.def" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
--- a/compat/zlib/contrib/vstudio/vc12/zlibvc.def
+++ b/compat/zlib/contrib/vstudio/vc12/zlibvc.def
@@ -0,0 +1,153 @@
+LIBRARY
+; zlib data compression and ZIP file I/O library
+
+VERSION		1.2
+
+EXPORTS
+        adler32                                  @1
+        compress                                 @2
+        crc32                                    @3
+        deflate                                  @4
+        deflateCopy                              @5
+        deflateEnd                               @6
+        deflateInit2_                            @7
+        deflateInit_                             @8
+        deflateParams                            @9
+        deflateReset                             @10
+        deflateSetDictionary                     @11
+        gzclose                                  @12
+        gzdopen                                  @13
+        gzerror                                  @14
+        gzflush                                  @15
+        gzopen                                   @16
+        gzread                                   @17
+        gzwrite                                  @18
+        inflate                                  @19
+        inflateEnd                               @20
+        inflateInit2_                            @21
+        inflateInit_                             @22
+        inflateReset                             @23
+        inflateSetDictionary                     @24
+        inflateSync                              @25
+        uncompress                               @26
+        zlibVersion                              @27
+        gzprintf                                 @28
+        gzputc                                   @29
+        gzgetc                                   @30
+        gzseek                                   @31
+        gzrewind                                 @32
+        gztell                                   @33
+        gzeof                                    @34
+        gzsetparams                              @35
+        zError                                   @36
+        inflateSyncPoint                         @37
+        get_crc_table                            @38
+        compress2                                @39
+        gzputs                                   @40
+        gzgets                                   @41
+        inflateCopy                              @42
+        inflateBackInit_                         @43
+        inflateBack                              @44
+        inflateBackEnd                           @45
+        compressBound                            @46
+        deflateBound                             @47
+        gzclearerr                               @48
+        gzungetc                                 @49
+        zlibCompileFlags                         @50
+        deflatePrime                             @51
+        deflatePending                           @52
+
+        unzOpen                                  @61
+        unzClose                                 @62
+        unzGetGlobalInfo                         @63
+        unzGetCurrentFileInfo                    @64
+        unzGoToFirstFile                         @65
+        unzGoToNextFile                          @66
+        unzOpenCurrentFile                       @67
+        unzReadCurrentFile                       @68
+        unzOpenCurrentFile3                      @69
+        unztell                                  @70
+        unzeof                                   @71
+        unzCloseCurrentFile                      @72
+        unzGetGlobalComment                      @73
+        unzStringFileNameCompare                 @74
+        unzLocateFile                            @75
+        unzGetLocalExtrafield                    @76
+        unzOpen2                                 @77
+        unzOpenCurrentFile2                      @78
+        unzOpenCurrentFilePassword               @79
+
+        zipOpen                                  @80
+        zipOpenNewFileInZip                      @81
+        zipWriteInFileInZip                      @82
+        zipCloseFileInZip                        @83
+        zipClose                                 @84
+        zipOpenNewFileInZip2                     @86
+        zipCloseFileInZipRaw                     @87
+        zipOpen2                                 @88
+        zipOpenNewFileInZip3                     @89
+
+        unzGetFilePos                            @100
+        unzGoToFilePos                           @101
+
+        fill_win32_filefunc                      @110
+
+; zlibwapi v1.2.4 added:
+        fill_win32_filefunc64                   @111
+        fill_win32_filefunc64A                  @112
+        fill_win32_filefunc64W                  @113
+
+        unzOpen64                               @120
+        unzOpen2_64                             @121
+        unzGetGlobalInfo64                      @122
+        unzGetCurrentFileInfo64                 @124
+        unzGetCurrentFileZStreamPos64           @125
+        unztell64                               @126
+        unzGetFilePos64                         @127
+        unzGoToFilePos64                        @128
+
+        zipOpen64                               @130
+        zipOpen2_64                             @131
+        zipOpenNewFileInZip64                   @132
+        zipOpenNewFileInZip2_64                 @133
+        zipOpenNewFileInZip3_64                 @134
+        zipOpenNewFileInZip4_64                 @135
+        zipCloseFileInZipRaw64                  @136
+
+; zlib1 v1.2.4 added:
+        adler32_combine                         @140
+        crc32_combine                           @142
+        deflateSetHeader                        @144
+        deflateTune                             @145
+        gzbuffer                                @146
+        gzclose_r                               @147
+        gzclose_w                               @148
+        gzdirect                                @149
+        gzoffset                                @150
+        inflateGetHeader                        @156
+        inflateMark                             @157
+        inflatePrime                            @158
+        inflateReset2                           @159
+        inflateUndermine                        @160
+
+; zlib1 v1.2.6 added:
+        gzgetc_                                 @161
+        inflateResetKeep                        @163
+        deflateResetKeep                        @164
+
+; zlib1 v1.2.7 added:
+        gzopen_w                                @165
+
+; zlib1 v1.2.8 added:
+        inflateGetDictionary                    @166
+        gzvprintf                               @167
+
+; zlib1 v1.2.9 added:
+        inflateCodesUsed                        @168
+        inflateValidate                         @169
+        uncompress2                             @170
+        gzfread                                 @171
+        gzfwrite                                @172
+        deflateGetDictionary                    @173
+        adler32_z                               @174
+        crc32_z                                 @175
--- a/compat/zlib/contrib/vstudio/vc12/zlibvc.sln
+++ b/compat/zlib/contrib/vstudio/vc12/zlibvc.sln
@@ -0,0 +1,119 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 2013
+VisualStudioVersion = 12.0.40629.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "zlibvc", "zlibvc.vcxproj", "{8FD826F8-3739-44E6-8CC8-997122E53B8D}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "zlibstat", "zlibstat.vcxproj", "{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "testzlib", "testzlib.vcxproj", "{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "testzlibdll", "testzlibdll.vcxproj", "{C52F9E7B-498A-42BE-8DB4-85A15694366A}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "minizip", "minizip.vcxproj", "{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "miniunz", "miniunz.vcxproj", "{C52F9E7B-498A-42BE-8DB4-85A15694382A}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Itanium = Debug|Itanium
+		Debug|Win32 = Debug|Win32
+		Debug|x64 = Debug|x64
+		Release|Itanium = Release|Itanium
+		Release|Win32 = Release|Win32
+		Release|x64 = Release|x64
+		ReleaseWithoutAsm|Itanium = ReleaseWithoutAsm|Itanium
+		ReleaseWithoutAsm|Win32 = ReleaseWithoutAsm|Win32
+		ReleaseWithoutAsm|x64 = ReleaseWithoutAsm|x64
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Debug|Itanium.ActiveCfg = Debug|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Debug|Win32.ActiveCfg = Debug|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Debug|Win32.Build.0 = Debug|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Debug|x64.ActiveCfg = Debug|x64
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Debug|x64.Build.0 = Debug|x64
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Release|Itanium.ActiveCfg = Release|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Release|Win32.ActiveCfg = Release|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Release|Win32.Build.0 = Release|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Release|x64.ActiveCfg = Release|x64
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Release|x64.Build.0 = Release|x64
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.ReleaseWithoutAsm|Itanium.ActiveCfg = ReleaseWithoutAsm|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.ReleaseWithoutAsm|Win32.ActiveCfg = ReleaseWithoutAsm|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.ReleaseWithoutAsm|Win32.Build.0 = ReleaseWithoutAsm|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.ReleaseWithoutAsm|x64.ActiveCfg = ReleaseWithoutAsm|x64
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.ReleaseWithoutAsm|x64.Build.0 = ReleaseWithoutAsm|x64
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Debug|Itanium.ActiveCfg = Debug|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Debug|Win32.ActiveCfg = Debug|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Debug|Win32.Build.0 = Debug|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Debug|x64.ActiveCfg = Debug|x64
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Debug|x64.Build.0 = Debug|x64
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Release|Itanium.ActiveCfg = Release|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Release|Win32.ActiveCfg = Release|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Release|Win32.Build.0 = Release|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Release|x64.ActiveCfg = Release|x64
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Release|x64.Build.0 = Release|x64
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.ReleaseWithoutAsm|Itanium.ActiveCfg = ReleaseWithoutAsm|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.ReleaseWithoutAsm|Win32.ActiveCfg = ReleaseWithoutAsm|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.ReleaseWithoutAsm|Win32.Build.0 = ReleaseWithoutAsm|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.ReleaseWithoutAsm|x64.ActiveCfg = ReleaseWithoutAsm|x64
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.ReleaseWithoutAsm|x64.Build.0 = ReleaseWithoutAsm|x64
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.Debug|Itanium.ActiveCfg = Debug|Win32
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.Debug|Win32.ActiveCfg = Debug|Win32
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--- a/compat/zlib/contrib/vstudio/vc12/zlibvc.vcxproj
+++ b/compat/zlib/contrib/vstudio/vc12/zlibvc.vcxproj
@@ -0,0 +1,692 @@
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--- a/compat/zlib/contrib/vstudio/vc14/miniunz.vcxproj
+++ b/compat/zlib/contrib/vstudio/vc14/miniunz.vcxproj
@@ -0,0 +1,316 @@
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--- a/compat/zlib/contrib/vstudio/vc14/zlib.rc
+++ b/compat/zlib/contrib/vstudio/vc14/zlib.rc
@@ -0,0 +1,32 @@
+#include <windows.h>
+
+#define IDR_VERSION1  1
+IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
+  FILEVERSION	 1, 2, 11, 0
+  PRODUCTVERSION 1, 2, 11, 0
+  FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
+  FILEFLAGS	0
+  FILEOS	VOS_DOS_WINDOWS32
+  FILETYPE	VFT_DLL
+  FILESUBTYPE	0	// not used
+BEGIN
+  BLOCK "StringFileInfo"
+  BEGIN
+    BLOCK "040904E4"
+    //language ID = U.S. English, char set = Windows, Multilingual
+
+    BEGIN
+      VALUE "FileDescription", "zlib data compression and ZIP file I/O library\0"
+      VALUE "FileVersion",	"1.2.11\0"
+      VALUE "InternalName",	"zlib\0"
+      VALUE "OriginalFilename",	"zlibwapi.dll\0"
+      VALUE "ProductName",	"ZLib.DLL\0"
+      VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
+      VALUE "LegalCopyright", "(C) 1995-2017 Jean-loup Gailly & Mark Adler\0"
+    END
+  END
+  BLOCK "VarFileInfo"
+  BEGIN
+    VALUE "Translation", 0x0409, 1252
+  END
+END
--- a/compat/zlib/contrib/vstudio/vc14/zlibstat.vcxproj
+++ b/compat/zlib/contrib/vstudio/vc14/zlibstat.vcxproj
@@ -0,0 +1,467 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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+    <ProjectConfiguration Include="Debug|Itanium">
+      <Configuration>Debug</Configuration>
+      <Platform>Itanium</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="ReleaseWithoutAsm|Itanium">
+      <Configuration>ReleaseWithoutAsm</Configuration>
+      <Platform>Itanium</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="ReleaseWithoutAsm|Win32">
+      <Configuration>ReleaseWithoutAsm</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="ReleaseWithoutAsm|x64">
+      <Configuration>ReleaseWithoutAsm</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Itanium">
+      <Configuration>Release</Configuration>
+      <Platform>Itanium</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}</ProjectGuid>
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+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|Win32'" Label="Configuration">
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+    <UseOfMfc>false</UseOfMfc>
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+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseOfMfc>false</UseOfMfc>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
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+    <UseOfMfc>false</UseOfMfc>
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+    <UseOfMfc>false</UseOfMfc>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'" Label="Configuration">
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+    <UseOfMfc>false</UseOfMfc>
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+  <ImportGroup Label="ExtensionSettings">
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+      <StringPooling>true</StringPooling>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeaderOutputFile>$(IntDir)zlibstat.pch</PrecompiledHeaderOutputFile>
+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
+      <ObjectFileName>$(IntDir)</ObjectFileName>
+      <ProgramDataBaseFileName>$(OutDir)</ProgramDataBaseFileName>
+      <WarningLevel>Level3</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </ClCompile>
+    <ResourceCompile>
+      <Culture>0x040c</Culture>
+    </ResourceCompile>
+    <Lib>
+      <AdditionalOptions>/MACHINE:IA64 /NODEFAULTLIB %(AdditionalOptions)</AdditionalOptions>
+      <OutputFile>$(OutDir)zlibstat.lib</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </Lib>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\..\adler32.c" />
+    <ClCompile Include="..\..\..\compress.c" />
+    <ClCompile Include="..\..\..\crc32.c" />
+    <ClCompile Include="..\..\..\deflate.c" />
+    <ClCompile Include="..\..\..\gzclose.c" />
+    <ClCompile Include="..\..\..\gzlib.c" />
+    <ClCompile Include="..\..\..\gzread.c" />
+    <ClCompile Include="..\..\..\gzwrite.c" />
+    <ClCompile Include="..\..\..\infback.c" />
+    <ClCompile Include="..\..\masmx64\inffas8664.c">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Itanium'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|Itanium'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\inffast.c" />
+    <ClCompile Include="..\..\..\inflate.c" />
+    <ClCompile Include="..\..\..\inftrees.c" />
+    <ClCompile Include="..\..\minizip\ioapi.c" />
+    <ClCompile Include="..\..\..\trees.c" />
+    <ClCompile Include="..\..\..\uncompr.c" />
+    <ClCompile Include="..\..\minizip\unzip.c" />
+    <ClCompile Include="..\..\minizip\zip.c" />
+    <ClCompile Include="..\..\..\zutil.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="zlib.rc" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="zlibvc.def" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
--- a/compat/zlib/contrib/vstudio/vc14/zlibvc.def
+++ b/compat/zlib/contrib/vstudio/vc14/zlibvc.def
@@ -0,0 +1,153 @@
+LIBRARY
+; zlib data compression and ZIP file I/O library
+
+VERSION		1.2
+
+EXPORTS
+        adler32                                  @1
+        compress                                 @2
+        crc32                                    @3
+        deflate                                  @4
+        deflateCopy                              @5
+        deflateEnd                               @6
+        deflateInit2_                            @7
+        deflateInit_                             @8
+        deflateParams                            @9
+        deflateReset                             @10
+        deflateSetDictionary                     @11
+        gzclose                                  @12
+        gzdopen                                  @13
+        gzerror                                  @14
+        gzflush                                  @15
+        gzopen                                   @16
+        gzread                                   @17
+        gzwrite                                  @18
+        inflate                                  @19
+        inflateEnd                               @20
+        inflateInit2_                            @21
+        inflateInit_                             @22
+        inflateReset                             @23
+        inflateSetDictionary                     @24
+        inflateSync                              @25
+        uncompress                               @26
+        zlibVersion                              @27
+        gzprintf                                 @28
+        gzputc                                   @29
+        gzgetc                                   @30
+        gzseek                                   @31
+        gzrewind                                 @32
+        gztell                                   @33
+        gzeof                                    @34
+        gzsetparams                              @35
+        zError                                   @36
+        inflateSyncPoint                         @37
+        get_crc_table                            @38
+        compress2                                @39
+        gzputs                                   @40
+        gzgets                                   @41
+        inflateCopy                              @42
+        inflateBackInit_                         @43
+        inflateBack                              @44
+        inflateBackEnd                           @45
+        compressBound                            @46
+        deflateBound                             @47
+        gzclearerr                               @48
+        gzungetc                                 @49
+        zlibCompileFlags                         @50
+        deflatePrime                             @51
+        deflatePending                           @52
+
+        unzOpen                                  @61
+        unzClose                                 @62
+        unzGetGlobalInfo                         @63
+        unzGetCurrentFileInfo                    @64
+        unzGoToFirstFile                         @65
+        unzGoToNextFile                          @66
+        unzOpenCurrentFile                       @67
+        unzReadCurrentFile                       @68
+        unzOpenCurrentFile3                      @69
+        unztell                                  @70
+        unzeof                                   @71
+        unzCloseCurrentFile                      @72
+        unzGetGlobalComment                      @73
+        unzStringFileNameCompare                 @74
+        unzLocateFile                            @75
+        unzGetLocalExtrafield                    @76
+        unzOpen2                                 @77
+        unzOpenCurrentFile2                      @78
+        unzOpenCurrentFilePassword               @79
+
+        zipOpen                                  @80
+        zipOpenNewFileInZip                      @81
+        zipWriteInFileInZip                      @82
+        zipCloseFileInZip                        @83
+        zipClose                                 @84
+        zipOpenNewFileInZip2                     @86
+        zipCloseFileInZipRaw                     @87
+        zipOpen2                                 @88
+        zipOpenNewFileInZip3                     @89
+
+        unzGetFilePos                            @100
+        unzGoToFilePos                           @101
+
+        fill_win32_filefunc                      @110
+
+; zlibwapi v1.2.4 added:
+        fill_win32_filefunc64                   @111
+        fill_win32_filefunc64A                  @112
+        fill_win32_filefunc64W                  @113
+
+        unzOpen64                               @120
+        unzOpen2_64                             @121
+        unzGetGlobalInfo64                      @122
+        unzGetCurrentFileInfo64                 @124
+        unzGetCurrentFileZStreamPos64           @125
+        unztell64                               @126
+        unzGetFilePos64                         @127
+        unzGoToFilePos64                        @128
+
+        zipOpen64                               @130
+        zipOpen2_64                             @131
+        zipOpenNewFileInZip64                   @132
+        zipOpenNewFileInZip2_64                 @133
+        zipOpenNewFileInZip3_64                 @134
+        zipOpenNewFileInZip4_64                 @135
+        zipCloseFileInZipRaw64                  @136
+
+; zlib1 v1.2.4 added:
+        adler32_combine                         @140
+        crc32_combine                           @142
+        deflateSetHeader                        @144
+        deflateTune                             @145
+        gzbuffer                                @146
+        gzclose_r                               @147
+        gzclose_w                               @148
+        gzdirect                                @149
+        gzoffset                                @150
+        inflateGetHeader                        @156
+        inflateMark                             @157
+        inflatePrime                            @158
+        inflateReset2                           @159
+        inflateUndermine                        @160
+
+; zlib1 v1.2.6 added:
+        gzgetc_                                 @161
+        inflateResetKeep                        @163
+        deflateResetKeep                        @164
+
+; zlib1 v1.2.7 added:
+        gzopen_w                                @165
+
+; zlib1 v1.2.8 added:
+        inflateGetDictionary                    @166
+        gzvprintf                               @167
+
+; zlib1 v1.2.9 added:
+        inflateCodesUsed                        @168
+        inflateValidate                         @169
+        uncompress2                             @170
+        gzfread                                 @171
+        gzfwrite                                @172
+        deflateGetDictionary                    @173
+        adler32_z                               @174
+        crc32_z                                 @175
--- a/compat/zlib/contrib/vstudio/vc14/zlibvc.sln
+++ b/compat/zlib/contrib/vstudio/vc14/zlibvc.sln
@@ -0,0 +1,119 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 14
+VisualStudioVersion = 14.0.25420.1
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "zlibvc", "zlibvc.vcxproj", "{8FD826F8-3739-44E6-8CC8-997122E53B8D}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "zlibstat", "zlibstat.vcxproj", "{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "testzlib", "testzlib.vcxproj", "{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "testzlibdll", "testzlibdll.vcxproj", "{C52F9E7B-498A-42BE-8DB4-85A15694366A}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "minizip", "minizip.vcxproj", "{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "miniunz", "miniunz.vcxproj", "{C52F9E7B-498A-42BE-8DB4-85A15694382A}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Itanium = Debug|Itanium
+		Debug|Win32 = Debug|Win32
+		Debug|x64 = Debug|x64
+		Release|Itanium = Release|Itanium
+		Release|Win32 = Release|Win32
+		Release|x64 = Release|x64
+		ReleaseWithoutAsm|Itanium = ReleaseWithoutAsm|Itanium
+		ReleaseWithoutAsm|Win32 = ReleaseWithoutAsm|Win32
+		ReleaseWithoutAsm|x64 = ReleaseWithoutAsm|x64
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Debug|Itanium.ActiveCfg = Debug|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Debug|Win32.ActiveCfg = Debug|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Debug|Win32.Build.0 = Debug|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Debug|x64.ActiveCfg = Debug|x64
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Debug|x64.Build.0 = Debug|x64
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Release|Itanium.ActiveCfg = Release|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Release|Win32.ActiveCfg = Release|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Release|Win32.Build.0 = Release|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Release|x64.ActiveCfg = Release|x64
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.Release|x64.Build.0 = Release|x64
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.ReleaseWithoutAsm|Itanium.ActiveCfg = ReleaseWithoutAsm|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.ReleaseWithoutAsm|Win32.ActiveCfg = ReleaseWithoutAsm|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.ReleaseWithoutAsm|Win32.Build.0 = ReleaseWithoutAsm|Win32
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.ReleaseWithoutAsm|x64.ActiveCfg = ReleaseWithoutAsm|x64
+		{8FD826F8-3739-44E6-8CC8-997122E53B8D}.ReleaseWithoutAsm|x64.Build.0 = ReleaseWithoutAsm|x64
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Debug|Itanium.ActiveCfg = Debug|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Debug|Win32.ActiveCfg = Debug|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Debug|Win32.Build.0 = Debug|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Debug|x64.ActiveCfg = Debug|x64
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Debug|x64.Build.0 = Debug|x64
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Release|Itanium.ActiveCfg = Release|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Release|Win32.ActiveCfg = Release|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Release|Win32.Build.0 = Release|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Release|x64.ActiveCfg = Release|x64
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.Release|x64.Build.0 = Release|x64
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.ReleaseWithoutAsm|Itanium.ActiveCfg = ReleaseWithoutAsm|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.ReleaseWithoutAsm|Win32.ActiveCfg = ReleaseWithoutAsm|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.ReleaseWithoutAsm|Win32.Build.0 = ReleaseWithoutAsm|Win32
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.ReleaseWithoutAsm|x64.ActiveCfg = ReleaseWithoutAsm|x64
+		{745DEC58-EBB3-47A9-A9B8-4C6627C01BF8}.ReleaseWithoutAsm|x64.Build.0 = ReleaseWithoutAsm|x64
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.Debug|Itanium.ActiveCfg = Debug|Win32
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.Debug|Win32.ActiveCfg = Debug|Win32
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.Debug|Win32.Build.0 = Debug|Win32
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.Debug|x64.ActiveCfg = Debug|x64
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.Debug|x64.Build.0 = Debug|x64
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.Release|Itanium.ActiveCfg = Release|Win32
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.Release|Win32.ActiveCfg = Release|Win32
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.Release|Win32.Build.0 = Release|Win32
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.Release|x64.ActiveCfg = Release|x64
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.Release|x64.Build.0 = Release|x64
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.ReleaseWithoutAsm|Itanium.ActiveCfg = ReleaseWithoutAsm|Win32
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.ReleaseWithoutAsm|Win32.ActiveCfg = ReleaseWithoutAsm|Win32
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.ReleaseWithoutAsm|Win32.Build.0 = ReleaseWithoutAsm|Win32
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.ReleaseWithoutAsm|x64.ActiveCfg = ReleaseWithoutAsm|x64
+		{AA6666AA-E09F-4135-9C0C-4FE50C3C654B}.ReleaseWithoutAsm|x64.Build.0 = ReleaseWithoutAsm|x64
+		{C52F9E7B-498A-42BE-8DB4-85A15694366A}.Debug|Itanium.ActiveCfg = Debug|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694366A}.Debug|Win32.ActiveCfg = Debug|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694366A}.Debug|Win32.Build.0 = Debug|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694366A}.Debug|x64.ActiveCfg = Debug|x64
+		{C52F9E7B-498A-42BE-8DB4-85A15694366A}.Debug|x64.Build.0 = Debug|x64
+		{C52F9E7B-498A-42BE-8DB4-85A15694366A}.Release|Itanium.ActiveCfg = Release|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694366A}.Release|Win32.ActiveCfg = Release|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694366A}.Release|Win32.Build.0 = Release|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694366A}.Release|x64.ActiveCfg = Release|x64
+		{C52F9E7B-498A-42BE-8DB4-85A15694366A}.Release|x64.Build.0 = Release|x64
+		{C52F9E7B-498A-42BE-8DB4-85A15694366A}.ReleaseWithoutAsm|Itanium.ActiveCfg = Release|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694366A}.ReleaseWithoutAsm|Win32.ActiveCfg = Release|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694366A}.ReleaseWithoutAsm|x64.ActiveCfg = Release|x64
+		{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}.Debug|Itanium.ActiveCfg = Debug|Win32
+		{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}.Debug|Win32.ActiveCfg = Debug|Win32
+		{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}.Debug|Win32.Build.0 = Debug|Win32
+		{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}.Debug|x64.ActiveCfg = Debug|x64
+		{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}.Debug|x64.Build.0 = Debug|x64
+		{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}.Release|Itanium.ActiveCfg = Release|Win32
+		{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}.Release|Win32.ActiveCfg = Release|Win32
+		{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}.Release|Win32.Build.0 = Release|Win32
+		{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}.Release|x64.ActiveCfg = Release|x64
+		{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}.Release|x64.Build.0 = Release|x64
+		{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}.ReleaseWithoutAsm|Itanium.ActiveCfg = Release|Win32
+		{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}.ReleaseWithoutAsm|Win32.ActiveCfg = Release|Win32
+		{48CDD9DC-E09F-4135-9C0C-4FE50C3C654B}.ReleaseWithoutAsm|x64.ActiveCfg = Release|x64
+		{C52F9E7B-498A-42BE-8DB4-85A15694382A}.Debug|Itanium.ActiveCfg = Debug|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694382A}.Debug|Win32.ActiveCfg = Debug|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694382A}.Debug|Win32.Build.0 = Debug|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694382A}.Debug|x64.ActiveCfg = Debug|x64
+		{C52F9E7B-498A-42BE-8DB4-85A15694382A}.Debug|x64.Build.0 = Debug|x64
+		{C52F9E7B-498A-42BE-8DB4-85A15694382A}.Release|Itanium.ActiveCfg = Release|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694382A}.Release|Win32.ActiveCfg = Release|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694382A}.Release|Win32.Build.0 = Release|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694382A}.Release|x64.ActiveCfg = Release|x64
+		{C52F9E7B-498A-42BE-8DB4-85A15694382A}.Release|x64.Build.0 = Release|x64
+		{C52F9E7B-498A-42BE-8DB4-85A15694382A}.ReleaseWithoutAsm|Itanium.ActiveCfg = Release|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694382A}.ReleaseWithoutAsm|Win32.ActiveCfg = Release|Win32
+		{C52F9E7B-498A-42BE-8DB4-85A15694382A}.ReleaseWithoutAsm|x64.ActiveCfg = Release|x64
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal
--- a/compat/zlib/contrib/vstudio/vc14/zlibvc.vcxproj
+++ b/compat/zlib/contrib/vstudio/vc14/zlibvc.vcxproj
@@ -0,0 +1,692 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Itanium">
+      <Configuration>Debug</Configuration>
+      <Platform>Itanium</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="ReleaseWithoutAsm|Itanium">
+      <Configuration>ReleaseWithoutAsm</Configuration>
+      <Platform>Itanium</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="ReleaseWithoutAsm|Win32">
+      <Configuration>ReleaseWithoutAsm</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="ReleaseWithoutAsm|x64">
+      <Configuration>ReleaseWithoutAsm</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Itanium">
+      <Configuration>Release</Configuration>
+      <Platform>Itanium</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{8FD826F8-3739-44E6-8CC8-997122E53B8D}</ProjectGuid>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseOfMfc>false</UseOfMfc>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>v140</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|Win32'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
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+      <BrowseInformation>
+      </BrowseInformation>
+      <WarningLevel>Level3</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </ClCompile>
+    <ResourceCompile>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <Culture>0x040c</Culture>
+    </ResourceCompile>
+    <Link>
+      <OutputFile>$(OutDir)zlibwapi.dll</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <IgnoreAllDefaultLibraries>false</IgnoreAllDefaultLibraries>
+      <ModuleDefinitionFile>.\zlibvc.def</ModuleDefinitionFile>
+      <ProgramDatabaseFile>$(OutDir)zlibwapi.pdb</ProgramDatabaseFile>
+      <GenerateMapFile>true</GenerateMapFile>
+      <MapFileName>$(OutDir)zlibwapi.map</MapFileName>
+      <SubSystem>Windows</SubSystem>
+      <ImportLibrary>$(OutDir)zlibwapi.lib</ImportLibrary>
+      <TargetMachine>MachineX64</TargetMachine>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|Itanium'">
+    <Midl>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <MkTypLibCompatible>true</MkTypLibCompatible>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <TargetEnvironment>Itanium</TargetEnvironment>
+      <TypeLibraryName>$(OutDir)zlibvc.tlb</TypeLibraryName>
+    </Midl>
+    <ClCompile>
+      <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
+      <AdditionalIncludeDirectories>..\..\..;..\..\masmx86;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_WARNINGS;ZLIB_WINAPI;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <StringPooling>true</StringPooling>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeaderOutputFile>$(IntDir)zlibvc.pch</PrecompiledHeaderOutputFile>
+      <AssemblerOutput>All</AssemblerOutput>
+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
+      <ObjectFileName>$(IntDir)</ObjectFileName>
+      <ProgramDataBaseFileName>$(OutDir)</ProgramDataBaseFileName>
+      <BrowseInformation>
+      </BrowseInformation>
+      <WarningLevel>Level3</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </ClCompile>
+    <ResourceCompile>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <Culture>0x040c</Culture>
+    </ResourceCompile>
+    <Link>
+      <OutputFile>$(OutDir)zlibwapi.dll</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <IgnoreAllDefaultLibraries>false</IgnoreAllDefaultLibraries>
+      <ModuleDefinitionFile>.\zlibvc.def</ModuleDefinitionFile>
+      <ProgramDatabaseFile>$(OutDir)zlibwapi.pdb</ProgramDatabaseFile>
+      <GenerateMapFile>true</GenerateMapFile>
+      <MapFileName>$(OutDir)zlibwapi.map</MapFileName>
+      <SubSystem>Windows</SubSystem>
+      <ImportLibrary>$(OutDir)zlibwapi.lib</ImportLibrary>
+      <TargetMachine>MachineIA64</TargetMachine>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Midl>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <MkTypLibCompatible>true</MkTypLibCompatible>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <TargetEnvironment>X64</TargetEnvironment>
+      <TypeLibraryName>$(OutDir)zlibvc.tlb</TypeLibraryName>
+    </Midl>
+    <ClCompile>
+      <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
+      <AdditionalIncludeDirectories>..\..\..;..\..\masmx86;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_WARNINGS;ZLIB_WINAPI;ASMV;ASMINF;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <StringPooling>true</StringPooling>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeaderOutputFile>$(IntDir)zlibvc.pch</PrecompiledHeaderOutputFile>
+      <AssemblerOutput>All</AssemblerOutput>
+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
+      <ObjectFileName>$(IntDir)</ObjectFileName>
+      <ProgramDataBaseFileName>$(OutDir)</ProgramDataBaseFileName>
+      <BrowseInformation>
+      </BrowseInformation>
+      <WarningLevel>Level3</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </ClCompile>
+    <ResourceCompile>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <Culture>0x040c</Culture>
+    </ResourceCompile>
+    <Link>
+      <AdditionalDependencies>..\..\masmx64\gvmat64.obj;..\..\masmx64\inffasx64.obj;%(AdditionalDependencies)</AdditionalDependencies>
+      <OutputFile>$(OutDir)zlibwapi.dll</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <IgnoreAllDefaultLibraries>false</IgnoreAllDefaultLibraries>
+      <ModuleDefinitionFile>.\zlibvc.def</ModuleDefinitionFile>
+      <ProgramDatabaseFile>$(OutDir)zlibwapi.pdb</ProgramDatabaseFile>
+      <GenerateMapFile>true</GenerateMapFile>
+      <MapFileName>$(OutDir)zlibwapi.map</MapFileName>
+      <SubSystem>Windows</SubSystem>
+      <ImportLibrary>$(OutDir)zlibwapi.lib</ImportLibrary>
+      <TargetMachine>MachineX64</TargetMachine>
+    </Link>
+    <PreBuildEvent>
+      <Command>cd ..\..\masmx64
+bld_ml64.bat</Command>
+    </PreBuildEvent>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">
+    <Midl>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <MkTypLibCompatible>true</MkTypLibCompatible>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <TargetEnvironment>Itanium</TargetEnvironment>
+      <TypeLibraryName>$(OutDir)zlibvc.tlb</TypeLibraryName>
+    </Midl>
+    <ClCompile>
+      <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
+      <AdditionalIncludeDirectories>..\..\..;..\..\masmx86;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_WARNINGS;ZLIB_WINAPI;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <StringPooling>true</StringPooling>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeaderOutputFile>$(IntDir)zlibvc.pch</PrecompiledHeaderOutputFile>
+      <AssemblerOutput>All</AssemblerOutput>
+      <AssemblerListingLocation>$(IntDir)</AssemblerListingLocation>
+      <ObjectFileName>$(IntDir)</ObjectFileName>
+      <ProgramDataBaseFileName>$(OutDir)</ProgramDataBaseFileName>
+      <BrowseInformation>
+      </BrowseInformation>
+      <WarningLevel>Level3</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+    </ClCompile>
+    <ResourceCompile>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <Culture>0x040c</Culture>
+    </ResourceCompile>
+    <Link>
+      <OutputFile>$(OutDir)zlibwapi.dll</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <IgnoreAllDefaultLibraries>false</IgnoreAllDefaultLibraries>
+      <ModuleDefinitionFile>.\zlibvc.def</ModuleDefinitionFile>
+      <ProgramDatabaseFile>$(OutDir)zlibwapi.pdb</ProgramDatabaseFile>
+      <GenerateMapFile>true</GenerateMapFile>
+      <MapFileName>$(OutDir)zlibwapi.map</MapFileName>
+      <SubSystem>Windows</SubSystem>
+      <ImportLibrary>$(OutDir)zlibwapi.lib</ImportLibrary>
+      <TargetMachine>MachineIA64</TargetMachine>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\..\adler32.c" />
+    <ClCompile Include="..\..\..\compress.c" />
+    <ClCompile Include="..\..\..\crc32.c" />
+    <ClCompile Include="..\..\..\deflate.c" />
+    <ClCompile Include="..\..\..\gzclose.c" />
+    <ClCompile Include="..\..\..\gzlib.c" />
+    <ClCompile Include="..\..\..\gzread.c" />
+    <ClCompile Include="..\..\..\gzwrite.c" />
+    <ClCompile Include="..\..\..\infback.c" />
+    <ClCompile Include="..\..\masmx64\inffas8664.c">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Itanium'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|Itanium'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='ReleaseWithoutAsm|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\inffast.c" />
+    <ClCompile Include="..\..\..\inflate.c" />
+    <ClCompile Include="..\..\..\inftrees.c" />
+    <ClCompile Include="..\..\minizip\ioapi.c" />
+    <ClCompile Include="..\..\minizip\iowin32.c" />
+    <ClCompile Include="..\..\..\trees.c" />
+    <ClCompile Include="..\..\..\uncompr.c" />
+    <ClCompile Include="..\..\minizip\unzip.c">
+      <AdditionalIncludeDirectories Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">ZLIB_INTERNAL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">ZLIB_INTERNAL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories Condition="'$(Configuration)|$(Platform)'=='Release|x64'">%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|x64'">ZLIB_INTERNAL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <ClCompile Include="..\..\minizip\zip.c">
+      <AdditionalIncludeDirectories Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|Itanium'">ZLIB_INTERNAL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">ZLIB_INTERNAL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories Condition="'$(Configuration)|$(Platform)'=='Release|x64'">%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|x64'">ZLIB_INTERNAL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <ClCompile Include="..\..\..\zutil.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="zlib.rc" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="zlibvc.def" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="..\..\..\deflate.h" />
+    <ClInclude Include="..\..\..\infblock.h" />
+    <ClInclude Include="..\..\..\infcodes.h" />
+    <ClInclude Include="..\..\..\inffast.h" />
+    <ClInclude Include="..\..\..\inftrees.h" />
+    <ClInclude Include="..\..\..\infutil.h" />
+    <ClInclude Include="..\..\..\zconf.h" />
+    <ClInclude Include="..\..\..\zlib.h" />
+    <ClInclude Include="..\..\..\zutil.h" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
--- a/compat/zlib/contrib/vstudio/vc9/zlib.rc
+++ b/compat/zlib/contrib/vstudio/vc9/zlib.rc
@@ -2,8 +2,8 @@

 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1,2,8,0
-  PRODUCTVERSION 1,2,8,0
+  FILEVERSION	 1, 2, 11, 0
+  PRODUCTVERSION 1, 2, 11, 0
  FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
  FILEFLAGS	0
  FILEOS	VOS_DOS_WINDOWS32
@@ -17,12 +17,12 @@ BEGIN

    BEGIN
      VALUE "FileDescription", "zlib data compression and ZIP file I/O library\0"
-      VALUE "FileVersion",	"1.2.8\0"
+      VALUE "FileVersion",	"1.2.11\0"
      VALUE "InternalName",	"zlib\0"
      VALUE "OriginalFilename",	"zlibwapi.dll\0"
      VALUE "ProductName",	"ZLib.DLL\0"
      VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
-      VALUE "LegalCopyright", "(C) 1995-2013 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright", "(C) 1995-2017 Jean-loup Gailly & Mark Adler\0"
    END
  END
  BLOCK "VarFileInfo"
--- a/compat/zlib/contrib/vstudio/vc9/zlibvc.def
+++ b/compat/zlib/contrib/vstudio/vc9/zlibvc.def
@@ -1,7 +1,7 @@
 LIBRARY
 ; zlib data compression and ZIP file I/O library

-VERSION		1.2.8
+VERSION		1.2

 EXPORTS
        adler32                                  @1
@@ -141,3 +141,13 @@ EXPORTS
 ; zlib1 v1.2.8 added:
        inflateGetDictionary                    @166
        gzvprintf                               @167
+
+; zlib1 v1.2.9 added:
+        inflateCodesUsed                        @168
+        inflateValidate                         @169
+        uncompress2                             @170
+        gzfread                                 @171
+        gzfwrite                                @172
+        deflateGetDictionary                    @173
+        adler32_z                               @174
+        crc32_z                                 @175
--- a/compat/zlib/contrib/vstudio/vc9/zlibvc.sln
+++ b/compat/zlib/contrib/vstudio/vc9/zlibvc.sln
@@ -1,4 +1,4 @@
-
+
 Microsoft Visual Studio Solution File, Format Version 10.00
 # Visual Studio 2008
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "zlibvc", "zlibvc.vcproj", "{8FD826F8-3739-44E6-8CC8-997122E53B8D}"
--- a/compat/zlib/crc32.c
+++ b/compat/zlib/crc32.c
@@ -1,5 +1,5 @@
 /* crc32.c -- compute the CRC-32 of a data stream
- * Copyright (C) 1995-2006, 2010, 2011, 2012 Mark Adler
+ * Copyright (C) 1995-2006, 2010, 2011, 2012, 2016 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 *
 * Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
@@ -30,17 +30,15 @@

 #include "zutil.h"      /* for STDC and FAR definitions */

-#define local static
-
 /* Definitions for doing the crc four data bytes at a time. */
 #if !defined(NOBYFOUR) && defined(Z_U4)
 #  define BYFOUR
 #endif
 #ifdef BYFOUR
   local unsigned long crc32_little OF((unsigned long,
-                        const unsigned char FAR *, unsigned));
+                        const unsigned char FAR *, z_size_t));
   local unsigned long crc32_big OF((unsigned long,
-                        const unsigned char FAR *, unsigned));
+                        const unsigned char FAR *, z_size_t));
 #  define TBLS 8
 #else
 #  define TBLS 1
@@ -201,10 +199,10 @@ const z_crc_t FAR * ZEXPORT get_crc_table()
 #define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1

 /* ========================================================================= */
-unsigned long ZEXPORT crc32(crc, buf, len)
+unsigned long ZEXPORT crc32_z(crc, buf, len)
    unsigned long crc;
    const unsigned char FAR *buf;
-    uInt len;
+    z_size_t len;
 {
    if (buf == Z_NULL) return 0UL;

@@ -235,8 +233,29 @@ unsigned long ZEXPORT crc32(crc, buf, len)
    return crc ^ 0xffffffffUL;
 }

+/* ========================================================================= */
+unsigned long ZEXPORT crc32(crc, buf, len)
+    unsigned long crc;
+    const unsigned char FAR *buf;
+    uInt len;
+{
+    return crc32_z(crc, buf, len);
+}
+
 #ifdef BYFOUR

+/*
+   This BYFOUR code accesses the passed unsigned char * buffer with a 32-bit
+   integer pointer type. This violates the strict aliasing rule, where a
+   compiler can assume, for optimization purposes, that two pointers to
+   fundamentally different types won't ever point to the same memory. This can
+   manifest as a problem only if one of the pointers is written to. This code
+   only reads from those pointers. So long as this code remains isolated in
+   this compilation unit, there won't be a problem. For this reason, this code
+   should not be copied and pasted into a compilation unit in which other code
+   writes to the buffer that is passed to these routines.
+ */
+
 /* ========================================================================= */
 #define DOLIT4 c ^= *buf4++; \
        c = crc_table[3][c & 0xff] ^ crc_table[2][(c >> 8) & 0xff] ^ \
@@ -247,7 +266,7 @@ unsigned long ZEXPORT crc32(crc, buf, len)
 local unsigned long crc32_little(crc, buf, len)
    unsigned long crc;
    const unsigned char FAR *buf;
-    unsigned len;
+    z_size_t len;
 {
    register z_crc_t c;
    register const z_crc_t FAR *buf4;
@@ -278,7 +297,7 @@ local unsigned long crc32_little(crc, buf, len)
 }

 /* ========================================================================= */
-#define DOBIG4 c ^= *++buf4; \
+#define DOBIG4 c ^= *buf4++; \
        c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \
            crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24]
 #define DOBIG32 DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4
@@ -287,7 +306,7 @@ local unsigned long crc32_little(crc, buf, len)
 local unsigned long crc32_big(crc, buf, len)
    unsigned long crc;
    const unsigned char FAR *buf;
-    unsigned len;
+    z_size_t len;
 {
    register z_crc_t c;
    register const z_crc_t FAR *buf4;
@@ -300,7 +319,6 @@ local unsigned long crc32_big(crc, buf, len)
    }

    buf4 = (const z_crc_t FAR *)(const void FAR *)buf;
-    buf4--;
    while (len >= 32) {
        DOBIG32;
        len -= 32;
@@ -309,7 +327,6 @@ local unsigned long crc32_big(crc, buf, len)
        DOBIG4;
        len -= 4;
    }
-    buf4++;
    buf = (const unsigned char FAR *)buf4;

    if (len) do {
--- a/compat/zlib/deflate.c
+++ b/compat/zlib/deflate.c
--- a/compat/zlib/deflate.h
+++ b/compat/zlib/deflate.h
@@ -1,5 +1,5 @@
 /* deflate.h -- internal compression state
- * Copyright (C) 1995-2012 Jean-loup Gailly
+ * Copyright (C) 1995-2016 Jean-loup Gailly
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -51,13 +51,16 @@
 #define Buf_size 16
 /* size of bit buffer in bi_buf */

-#define INIT_STATE    42
-#define EXTRA_STATE   69
-#define NAME_STATE    73
-#define COMMENT_STATE 91
-#define HCRC_STATE   103
-#define BUSY_STATE   113
-#define FINISH_STATE 666
+#define INIT_STATE    42    /* zlib header -> BUSY_STATE */
+#ifdef GZIP
+#  define GZIP_STATE  57    /* gzip header -> BUSY_STATE | EXTRA_STATE */
+#endif
+#define EXTRA_STATE   69    /* gzip extra block -> NAME_STATE */
+#define NAME_STATE    73    /* gzip file name -> COMMENT_STATE */
+#define COMMENT_STATE 91    /* gzip comment -> HCRC_STATE */
+#define HCRC_STATE   103    /* gzip header CRC -> BUSY_STATE */
+#define BUSY_STATE   113    /* deflate -> FINISH_STATE */
+#define FINISH_STATE 666    /* stream complete */
 /* Stream status */


@@ -83,7 +86,7 @@ typedef struct static_tree_desc_s  static_tree_desc;
 typedef struct tree_desc_s {
    ct_data *dyn_tree;           /* the dynamic tree */
    int     max_code;            /* largest code with non zero frequency */
-    static_tree_desc *stat_desc; /* the corresponding static tree */
+    const static_tree_desc *stat_desc;  /* the corresponding static tree */
 } FAR tree_desc;

 typedef ush Pos;
@@ -100,10 +103,10 @@ typedef struct internal_state {
    Bytef *pending_buf;  /* output still pending */
    ulg   pending_buf_size; /* size of pending_buf */
    Bytef *pending_out;  /* next pending byte to output to the stream */
-    uInt   pending;      /* nb of bytes in the pending buffer */
+    ulg   pending;       /* nb of bytes in the pending buffer */
    int   wrap;          /* bit 0 true for zlib, bit 1 true for gzip */
    gz_headerp  gzhead;  /* gzip header information to write */
-    uInt   gzindex;      /* where in extra, name, or comment */
+    ulg   gzindex;       /* where in extra, name, or comment */
    Byte  method;        /* can only be DEFLATED */
    int   last_flush;    /* value of flush param for previous deflate call */

@@ -249,7 +252,7 @@ typedef struct internal_state {
    uInt matches;       /* number of string matches in current block */
    uInt insert;        /* bytes at end of window left to insert */

-#ifdef DEBUG
+#ifdef ZLIB_DEBUG
    ulg compressed_len; /* total bit length of compressed file mod 2^32 */
    ulg bits_sent;      /* bit length of compressed data sent mod 2^32 */
 #endif
@@ -275,7 +278,7 @@ typedef struct internal_state {
 /* Output a byte on the stream.
 * IN assertion: there is enough room in pending_buf.
 */
-#define put_byte(s, c) {s->pending_buf[s->pending++] = (c);}
+#define put_byte(s, c) {s->pending_buf[s->pending++] = (Bytef)(c);}


 #define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
@@ -309,7 +312,7 @@ void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf,
 * used.
 */

-#ifndef DEBUG
+#ifndef ZLIB_DEBUG
 /* Inline versions of _tr_tally for speed: */

 #if defined(GEN_TREES_H) || !defined(STDC)
@@ -328,8 +331,8 @@ void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf,
    flush = (s->last_lit == s->lit_bufsize-1); \
   }
 # define _tr_tally_dist(s, distance, length, flush) \
-  { uch len = (length); \
-    ush dist = (distance); \
+  { uch len = (uch)(length); \
+    ush dist = (ush)(distance); \
    s->d_buf[s->last_lit] = dist; \
    s->l_buf[s->last_lit++] = len; \
    dist--; \
--- a/compat/zlib/doc/algorithm.txt
+++ b/compat/zlib/doc/algorithm.txt
@@ -1,209 +0,0 @@
-1. Compression algorithm (deflate)
-
-The deflation algorithm used by gzip (also zip and zlib) is a variation of
-LZ77 (Lempel-Ziv 1977, see reference below). It finds duplicated strings in
-the input data.  The second occurrence of a string is replaced by a
-pointer to the previous string, in the form of a pair (distance,
-length).  Distances are limited to 32K bytes, and lengths are limited
-to 258 bytes. When a string does not occur anywhere in the previous
-32K bytes, it is emitted as a sequence of literal bytes.  (In this
-description, `string' must be taken as an arbitrary sequence of bytes,
-and is not restricted to printable characters.)
-
-Literals or match lengths are compressed with one Huffman tree, and
-match distances are compressed with another tree. The trees are stored
-in a compact form at the start of each block. The blocks can have any
-size (except that the compressed data for one block must fit in
-available memory). A block is terminated when deflate() determines that
-it would be useful to start another block with fresh trees. (This is
-somewhat similar to the behavior of LZW-based _compress_.)
-
-Duplicated strings are found using a hash table. All input strings of
-length 3 are inserted in the hash table. A hash index is computed for
-the next 3 bytes. If the hash chain for this index is not empty, all
-strings in the chain are compared with the current input string, and
-the longest match is selected.
-
-The hash chains are searched starting with the most recent strings, to
-favor small distances and thus take advantage of the Huffman encoding.
-The hash chains are singly linked. There are no deletions from the
-hash chains, the algorithm simply discards matches that are too old.
-
-To avoid a worst-case situation, very long hash chains are arbitrarily
-truncated at a certain length, determined by a runtime option (level
-parameter of deflateInit). So deflate() does not always find the longest
-possible match but generally finds a match which is long enough.
-
-deflate() also defers the selection of matches with a lazy evaluation
-mechanism. After a match of length N has been found, deflate() searches for
-a longer match at the next input byte. If a longer match is found, the
-previous match is truncated to a length of one (thus producing a single
-literal byte) and the process of lazy evaluation begins again. Otherwise,
-the original match is kept, and the next match search is attempted only N
-steps later.
-
-The lazy match evaluation is also subject to a runtime parameter. If
-the current match is long enough, deflate() reduces the search for a longer
-match, thus speeding up the whole process. If compression ratio is more
-important than speed, deflate() attempts a complete second search even if
-the first match is already long enough.
-
-The lazy match evaluation is not performed for the fastest compression
-modes (level parameter 1 to 3). For these fast modes, new strings
-are inserted in the hash table only when no match was found, or
-when the match is not too long. This degrades the compression ratio
-but saves time since there are both fewer insertions and fewer searches.
-
-
-2. Decompression algorithm (inflate)
-
-2.1 Introduction
-
-The key question is how to represent a Huffman code (or any prefix code) so
-that you can decode fast.  The most important characteristic is that shorter
-codes are much more common than longer codes, so pay attention to decoding the
-short codes fast, and let the long codes take longer to decode.
-
-inflate() sets up a first level table that covers some number of bits of
-input less than the length of longest code.  It gets that many bits from the
-stream, and looks it up in the table.  The table will tell if the next
-code is that many bits or less and how many, and if it is, it will tell
-the value, else it will point to the next level table for which inflate()
-grabs more bits and tries to decode a longer code.
-
-How many bits to make the first lookup is a tradeoff between the time it
-takes to decode and the time it takes to build the table.  If building the
-table took no time (and if you had infinite memory), then there would only
-be a first level table to cover all the way to the longest code.  However,
-building the table ends up taking a lot longer for more bits since short
-codes are replicated many times in such a table.  What inflate() does is
-simply to make the number of bits in the first table a variable, and  then
-to set that variable for the maximum speed.
-
-For inflate, which has 286 possible codes for the literal/length tree, the size
-of the first table is nine bits.  Also the distance trees have 30 possible
-values, and the size of the first table is six bits.  Note that for each of
-those cases, the table ended up one bit longer than the ``average'' code
-length, i.e. the code length of an approximately flat code which would be a
-little more than eight bits for 286 symbols and a little less than five bits
-for 30 symbols.
-
-
-2.2 More details on the inflate table lookup
-
-Ok, you want to know what this cleverly obfuscated inflate tree actually
-looks like.  You are correct that it's not a Huffman tree.  It is simply a
-lookup table for the first, let's say, nine bits of a Huffman symbol.  The
-symbol could be as short as one bit or as long as 15 bits.  If a particular
-symbol is shorter than nine bits, then that symbol's translation is duplicated
-in all those entries that start with that symbol's bits.  For example, if the
-symbol is four bits, then it's duplicated 32 times in a nine-bit table.  If a
-symbol is nine bits long, it appears in the table once.
-
-If the symbol is longer than nine bits, then that entry in the table points
-to another similar table for the remaining bits.  Again, there are duplicated
-entries as needed.  The idea is that most of the time the symbol will be short
-and there will only be one table look up.  (That's whole idea behind data
-compression in the first place.)  For the less frequent long symbols, there
-will be two lookups.  If you had a compression method with really long
-symbols, you could have as many levels of lookups as is efficient.  For
-inflate, two is enough.
-
-So a table entry either points to another table (in which case nine bits in
-the above example are gobbled), or it contains the translation for the symbol
-and the number of bits to gobble.  Then you start again with the next
-ungobbled bit.
-
-You may wonder: why not just have one lookup table for how ever many bits the
-longest symbol is?  The reason is that if you do that, you end up spending
-more time filling in duplicate symbol entries than you do actually decoding.
-At least for deflate's output that generates new trees every several 10's of
-kbytes.  You can imagine that filling in a 2^15 entry table for a 15-bit code
-would take too long if you're only decoding several thousand symbols.  At the
-other extreme, you could make a new table for every bit in the code.  In fact,
-that's essentially a Huffman tree.  But then you spend too much time
-traversing the tree while decoding, even for short symbols.
-
-So the number of bits for the first lookup table is a trade of the time to
-fill out the table vs. the time spent looking at the second level and above of
-the table.
-
-Here is an example, scaled down:
-
-The code being decoded, with 10 symbols, from 1 to 6 bits long:
-
-A: 0
-B: 10
-C: 1100
-D: 11010
-E: 11011
-F: 11100
-G: 11101
-H: 11110
-I: 111110
-J: 111111
-
-Let's make the first table three bits long (eight entries):
-
-000: A,1
-001: A,1
-010: A,1
-011: A,1
-100: B,2
-101: B,2
-110: -> table X (gobble 3 bits)
-111: -> table Y (gobble 3 bits)
-
-Each entry is what the bits decode as and how many bits that is, i.e. how
-many bits to gobble.  Or the entry points to another table, with the number of
-bits to gobble implicit in the size of the table.
-
-Table X is two bits long since the longest code starting with 110 is five bits
-long:
-
-00: C,1
-01: C,1
-10: D,2
-11: E,2
-
-Table Y is three bits long since the longest code starting with 111 is six
-bits long:
-
-000: F,2
-001: F,2
-010: G,2
-011: G,2
-100: H,2
-101: H,2
-110: I,3
-111: J,3
-
-So what we have here are three tables with a total of 20 entries that had to
-be constructed.  That's compared to 64 entries for a single table.  Or
-compared to 16 entries for a Huffman tree (six two entry tables and one four
-entry table).  Assuming that the code ideally represents the probability of
-the symbols, it takes on the average 1.25 lookups per symbol.  That's compared
-to one lookup for the single table, or 1.66 lookups per symbol for the
-Huffman tree.
-
-There, I think that gives you a picture of what's going on.  For inflate, the
-meaning of a particular symbol is often more than just a letter.  It can be a
-byte (a "literal"), or it can be either a length or a distance which
-indicates a base value and a number of bits to fetch after the code that is
-added to the base value.  Or it might be the special end-of-block code.  The
-data structures created in inftrees.c try to encode all that information
-compactly in the tables.
-
-
-Jean-loup Gailly        Mark Adler
-jloup@gzip.org          madler@alumni.caltech.edu
-
-
-References:
-
-[LZ77] Ziv J., Lempel A., ``A Universal Algorithm for Sequential Data
-Compression,'' IEEE Transactions on Information Theory, Vol. 23, No. 3,
-pp. 337-343.
-
-``DEFLATE Compressed Data Format Specification'' available in
-http://tools.ietf.org/html/rfc1951
--- a/compat/zlib/doc/rfc1950.txt
+++ b/compat/zlib/doc/rfc1950.txt
@@ -1,619 +0,0 @@
-
-
-
-
-
-
-Network Working Group                                         P. Deutsch
-Request for Comments: 1950                           Aladdin Enterprises
-Category: Informational                                      J-L. Gailly
-                                                                Info-ZIP
-                                                                May 1996
-
-
-         ZLIB Compressed Data Format Specification version 3.3
-
-Status of This Memo
-
-   This memo provides information for the Internet community.  This memo
-   does not specify an Internet standard of any kind.  Distribution of
-   this memo is unlimited.
-
-IESG Note:
-
-   The IESG takes no position on the validity of any Intellectual
-   Property Rights statements contained in this document.
-
-Notices
-
-   Copyright (c) 1996 L. Peter Deutsch and Jean-Loup Gailly
-
-   Permission is granted to copy and distribute this document for any
-   purpose and without charge, including translations into other
-   languages and incorporation into compilations, provided that the
-   copyright notice and this notice are preserved, and that any
-   substantive changes or deletions from the original are clearly
-   marked.
-
-   A pointer to the latest version of this and related documentation in
-   HTML format can be found at the URL
-   <ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html>.
-
-Abstract
-
-   This specification defines a lossless compressed data format.  The
-   data can be produced or consumed, even for an arbitrarily long
-   sequentially presented input data stream, using only an a priori
-   bounded amount of intermediate storage.  The format presently uses
-   the DEFLATE compression method but can be easily extended to use
-   other compression methods.  It can be implemented readily in a manner
-   not covered by patents.  This specification also defines the ADLER-32
-   checksum (an extension and improvement of the Fletcher checksum),
-   used for detection of data corruption, and provides an algorithm for
-   computing it.
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 1]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-Table of Contents
-
-   1. Introduction ................................................... 2
-      1.1. Purpose ................................................... 2
-      1.2. Intended audience ......................................... 3
-      1.3. Scope ..................................................... 3
-      1.4. Compliance ................................................ 3
-      1.5.  Definitions of terms and conventions used ................ 3
-      1.6. Changes from previous versions ............................ 3
-   2. Detailed specification ......................................... 3
-      2.1. Overall conventions ....................................... 3
-      2.2. Data format ............................................... 4
-      2.3. Compliance ................................................ 7
-   3. References ..................................................... 7
-   4. Source code .................................................... 8
-   5. Security Considerations ........................................ 8
-   6. Acknowledgements ............................................... 8
-   7. Authors' Addresses ............................................. 8
-   8. Appendix: Rationale ............................................ 9
-   9. Appendix: Sample code ..........................................10
-
-1. Introduction
-
-   1.1. Purpose
-
-      The purpose of this specification is to define a lossless
-      compressed data format that:
-
-          * Is independent of CPU type, operating system, file system,
-            and character set, and hence can be used for interchange;
-
-          * Can be produced or consumed, even for an arbitrarily long
-            sequentially presented input data stream, using only an a
-            priori bounded amount of intermediate storage, and hence can
-            be used in data communications or similar structures such as
-            Unix filters;
-
-          * Can use a number of different compression methods;
-
-          * Can be implemented readily in a manner not covered by
-            patents, and hence can be practiced freely.
-
-      The data format defined by this specification does not attempt to
-      allow random access to compressed data.
-
-
-
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 2]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-   1.2. Intended audience
-
-      This specification is intended for use by implementors of software
-      to compress data into zlib format and/or decompress data from zlib
-      format.
-
-      The text of the specification assumes a basic background in
-      programming at the level of bits and other primitive data
-      representations.
-
-   1.3. Scope
-
-      The specification specifies a compressed data format that can be
-      used for in-memory compression of a sequence of arbitrary bytes.
-
-   1.4. Compliance
-
-      Unless otherwise indicated below, a compliant decompressor must be
-      able to accept and decompress any data set that conforms to all
-      the specifications presented here; a compliant compressor must
-      produce data sets that conform to all the specifications presented
-      here.
-
-   1.5.  Definitions of terms and conventions used
-
-      byte: 8 bits stored or transmitted as a unit (same as an octet).
-      (For this specification, a byte is exactly 8 bits, even on
-      machines which store a character on a number of bits different
-      from 8.) See below, for the numbering of bits within a byte.
-
-   1.6. Changes from previous versions
-
-      Version 3.1 was the first public release of this specification.
-      In version 3.2, some terminology was changed and the Adler-32
-      sample code was rewritten for clarity.  In version 3.3, the
-      support for a preset dictionary was introduced, and the
-      specification was converted to RFC style.
-
-2. Detailed specification
-
-   2.1. Overall conventions
-
-      In the diagrams below, a box like this:
-
-         +---+
-         |   | <-- the vertical bars might be missing
-         +---+
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 3]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-      represents one byte; a box like this:
-
-         +==============+
-         |              |
-         +==============+
-
-      represents a variable number of bytes.
-
-      Bytes stored within a computer do not have a "bit order", since
-      they are always treated as a unit.  However, a byte considered as
-      an integer between 0 and 255 does have a most- and least-
-      significant bit, and since we write numbers with the most-
-      significant digit on the left, we also write bytes with the most-
-      significant bit on the left.  In the diagrams below, we number the
-      bits of a byte so that bit 0 is the least-significant bit, i.e.,
-      the bits are numbered:
-
-         +--------+
-         |76543210|
-         +--------+
-
-      Within a computer, a number may occupy multiple bytes.  All
-      multi-byte numbers in the format described here are stored with
-      the MOST-significant byte first (at the lower memory address).
-      For example, the decimal number 520 is stored as:
-
-             0     1
-         +--------+--------+
-         |00000010|00001000|
-         +--------+--------+
-          ^        ^
-          |        |
-          |        + less significant byte = 8
-          + more significant byte = 2 x 256
-
-   2.2. Data format
-
-      A zlib stream has the following structure:
-
-           0   1
-         +---+---+
-         |CMF|FLG|   (more-->)
-         +---+---+
-
-
-
-
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 4]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-      (if FLG.FDICT set)
-
-           0   1   2   3
-         +---+---+---+---+
-         |     DICTID    |   (more-->)
-         +---+---+---+---+
-
-         +=====================+---+---+---+---+
-         |...compressed data...|    ADLER32    |
-         +=====================+---+---+---+---+
-
-      Any data which may appear after ADLER32 are not part of the zlib
-      stream.
-
-      CMF (Compression Method and flags)
-         This byte is divided into a 4-bit compression method and a 4-
-         bit information field depending on the compression method.
-
-            bits 0 to 3  CM     Compression method
-            bits 4 to 7  CINFO  Compression info
-
-      CM (Compression method)
-         This identifies the compression method used in the file. CM = 8
-         denotes the "deflate" compression method with a window size up
-         to 32K.  This is the method used by gzip and PNG (see
-         references [1] and [2] in Chapter 3, below, for the reference
-         documents).  CM = 15 is reserved.  It might be used in a future
-         version of this specification to indicate the presence of an
-         extra field before the compressed data.
-
-      CINFO (Compression info)
-         For CM = 8, CINFO is the base-2 logarithm of the LZ77 window
-         size, minus eight (CINFO=7 indicates a 32K window size). Values
-         of CINFO above 7 are not allowed in this version of the
-         specification.  CINFO is not defined in this specification for
-         CM not equal to 8.
-
-      FLG (FLaGs)
-         This flag byte is divided as follows:
-
-            bits 0 to 4  FCHECK  (check bits for CMF and FLG)
-            bit  5       FDICT   (preset dictionary)
-            bits 6 to 7  FLEVEL  (compression level)
-
-         The FCHECK value must be such that CMF and FLG, when viewed as
-         a 16-bit unsigned integer stored in MSB order (CMF*256 + FLG),
-         is a multiple of 31.
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 5]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-      FDICT (Preset dictionary)
-         If FDICT is set, a DICT dictionary identifier is present
-         immediately after the FLG byte. The dictionary is a sequence of
-         bytes which are initially fed to the compressor without
-         producing any compressed output. DICT is the Adler-32 checksum
-         of this sequence of bytes (see the definition of ADLER32
-         below).  The decompressor can use this identifier to determine
-         which dictionary has been used by the compressor.
-
-      FLEVEL (Compression level)
-         These flags are available for use by specific compression
-         methods.  The "deflate" method (CM = 8) sets these flags as
-         follows:
-
-            0 - compressor used fastest algorithm
-            1 - compressor used fast algorithm
-            2 - compressor used default algorithm
-            3 - compressor used maximum compression, slowest algorithm
-
-         The information in FLEVEL is not needed for decompression; it
-         is there to indicate if recompression might be worthwhile.
-
-      compressed data
-         For compression method 8, the compressed data is stored in the
-         deflate compressed data format as described in the document
-         "DEFLATE Compressed Data Format Specification" by L. Peter
-         Deutsch. (See reference [3] in Chapter 3, below)
-
-         Other compressed data formats are not specified in this version
-         of the zlib specification.
-
-      ADLER32 (Adler-32 checksum)
-         This contains a checksum value of the uncompressed data
-         (excluding any dictionary data) computed according to Adler-32
-         algorithm. This algorithm is a 32-bit extension and improvement
-         of the Fletcher algorithm, used in the ITU-T X.224 / ISO 8073
-         standard. See references [4] and [5] in Chapter 3, below)
-
-         Adler-32 is composed of two sums accumulated per byte: s1 is
-         the sum of all bytes, s2 is the sum of all s1 values. Both sums
-         are done modulo 65521. s1 is initialized to 1, s2 to zero.  The
-         Adler-32 checksum is stored as s2*65536 + s1 in most-
-         significant-byte first (network) order.
-
-
-
-
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 6]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-   2.3. Compliance
-
-      A compliant compressor must produce streams with correct CMF, FLG
-      and ADLER32, but need not support preset dictionaries.  When the
-      zlib data format is used as part of another standard data format,
-      the compressor may use only preset dictionaries that are specified
-      by this other data format.  If this other format does not use the
-      preset dictionary feature, the compressor must not set the FDICT
-      flag.
-
-      A compliant decompressor must check CMF, FLG, and ADLER32, and
-      provide an error indication if any of these have incorrect values.
-      A compliant decompressor must give an error indication if CM is
-      not one of the values defined in this specification (only the
-      value 8 is permitted in this version), since another value could
-      indicate the presence of new features that would cause subsequent
-      data to be interpreted incorrectly.  A compliant decompressor must
-      give an error indication if FDICT is set and DICTID is not the
-      identifier of a known preset dictionary.  A decompressor may
-      ignore FLEVEL and still be compliant.  When the zlib data format
-      is being used as a part of another standard format, a compliant
-      decompressor must support all the preset dictionaries specified by
-      the other format. When the other format does not use the preset
-      dictionary feature, a compliant decompressor must reject any
-      stream in which the FDICT flag is set.
-
-3. References
-
-   [1] Deutsch, L.P.,"GZIP Compressed Data Format Specification",
-       available in ftp://ftp.uu.net/pub/archiving/zip/doc/
-
-   [2] Thomas Boutell, "PNG (Portable Network Graphics) specification",
-       available in ftp://ftp.uu.net/graphics/png/documents/
-
-   [3] Deutsch, L.P.,"DEFLATE Compressed Data Format Specification",
-       available in ftp://ftp.uu.net/pub/archiving/zip/doc/
-
-   [4] Fletcher, J. G., "An Arithmetic Checksum for Serial
-       Transmissions," IEEE Transactions on Communications, Vol. COM-30,
-       No. 1, January 1982, pp. 247-252.
-
-   [5] ITU-T Recommendation X.224, Annex D, "Checksum Algorithms,"
-       November, 1993, pp. 144, 145. (Available from
-       gopher://info.itu.ch). ITU-T X.244 is also the same as ISO 8073.
-
-
-
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 7]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-4. Source code
-
-   Source code for a C language implementation of a "zlib" compliant
-   library is available at ftp://ftp.uu.net/pub/archiving/zip/zlib/.
-
-5. Security Considerations
-
-   A decoder that fails to check the ADLER32 checksum value may be
-   subject to undetected data corruption.
-
-6. Acknowledgements
-
-   Trademarks cited in this document are the property of their
-   respective owners.
-
-   Jean-Loup Gailly and Mark Adler designed the zlib format and wrote
-   the related software described in this specification.  Glenn
-   Randers-Pehrson converted this document to RFC and HTML format.
-
-7. Authors' Addresses
-
-   L. Peter Deutsch
-   Aladdin Enterprises
-   203 Santa Margarita Ave.
-   Menlo Park, CA 94025
-
-   Phone: (415) 322-0103 (AM only)
-   FAX:   (415) 322-1734
-   EMail: <ghost@aladdin.com>
-
-
-   Jean-Loup Gailly
-
-   EMail: <gzip@prep.ai.mit.edu>
-
-   Questions about the technical content of this specification can be
-   sent by email to
-
-   Jean-Loup Gailly <gzip@prep.ai.mit.edu> and
-   Mark Adler <madler@alumni.caltech.edu>
-
-   Editorial comments on this specification can be sent by email to
-
-   L. Peter Deutsch <ghost@aladdin.com> and
-   Glenn Randers-Pehrson <randeg@alumni.rpi.edu>
-
-
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 8]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-8. Appendix: Rationale
-
-   8.1. Preset dictionaries
-
-      A preset dictionary is specially useful to compress short input
-      sequences. The compressor can take advantage of the dictionary
-      context to encode the input in a more compact manner. The
-      decompressor can be initialized with the appropriate context by
-      virtually decompressing a compressed version of the dictionary
-      without producing any output. However for certain compression
-      algorithms such as the deflate algorithm this operation can be
-      achieved without actually performing any decompression.
-
-      The compressor and the decompressor must use exactly the same
-      dictionary. The dictionary may be fixed or may be chosen among a
-      certain number of predefined dictionaries, according to the kind
-      of input data. The decompressor can determine which dictionary has
-      been chosen by the compressor by checking the dictionary
-      identifier. This document does not specify the contents of
-      predefined dictionaries, since the optimal dictionaries are
-      application specific. Standard data formats using this feature of
-      the zlib specification must precisely define the allowed
-      dictionaries.
-
-   8.2. The Adler-32 algorithm
-
-      The Adler-32 algorithm is much faster than the CRC32 algorithm yet
-      still provides an extremely low probability of undetected errors.
-
-      The modulo on unsigned long accumulators can be delayed for 5552
-      bytes, so the modulo operation time is negligible.  If the bytes
-      are a, b, c, the second sum is 3a + 2b + c + 3, and so is position
-      and order sensitive, unlike the first sum, which is just a
-      checksum.  That 65521 is prime is important to avoid a possible
-      large class of two-byte errors that leave the check unchanged.
-      (The Fletcher checksum uses 255, which is not prime and which also
-      makes the Fletcher check insensitive to single byte changes 0 <->
-      255.)
-
-      The sum s1 is initialized to 1 instead of zero to make the length
-      of the sequence part of s2, so that the length does not have to be
-      checked separately. (Any sequence of zeroes has a Fletcher
-      checksum of zero.)
-
-
-
-
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 9]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-9. Appendix: Sample code
-
-   The following C code computes the Adler-32 checksum of a data buffer.
-   It is written for clarity, not for speed.  The sample code is in the
-   ANSI C programming language. Non C users may find it easier to read
-   with these hints:
-
-      &      Bitwise AND operator.
-      >>     Bitwise right shift operator. When applied to an
-             unsigned quantity, as here, right shift inserts zero bit(s)
-             at the left.
-      <<     Bitwise left shift operator. Left shift inserts zero
-             bit(s) at the right.
-      ++     "n++" increments the variable n.
-      %      modulo operator: a % b is the remainder of a divided by b.
-
-      #define BASE 65521 /* largest prime smaller than 65536 */
-
-      /*
-         Update a running Adler-32 checksum with the bytes buf[0..len-1]
-       and return the updated checksum. The Adler-32 checksum should be
-       initialized to 1.
-
-       Usage example:
-
-         unsigned long adler = 1L;
-
-         while (read_buffer(buffer, length) != EOF) {
-           adler = update_adler32(adler, buffer, length);
-         }
-         if (adler != original_adler) error();
-      */
-      unsigned long update_adler32(unsigned long adler,
-         unsigned char *buf, int len)
-      {
-        unsigned long s1 = adler & 0xffff;
-        unsigned long s2 = (adler >> 16) & 0xffff;
-        int n;
-
-        for (n = 0; n < len; n++) {
-          s1 = (s1 + buf[n]) % BASE;
-          s2 = (s2 + s1)     % BASE;
-        }
-        return (s2 << 16) + s1;
-      }
-
-      /* Return the adler32 of the bytes buf[0..len-1] */
-
-
-
-
-Deutsch & Gailly             Informational                     [Page 10]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-      unsigned long adler32(unsigned char *buf, int len)
-      {
-        return update_adler32(1L, buf, len);
-      }
-
-
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-Deutsch & Gailly             Informational                     [Page 11]
-
--- a/compat/zlib/doc/rfc1951.txt
+++ b/compat/zlib/doc/rfc1951.txt
@@ -1,955 +0,0 @@
-
-
-
-
-
-
-Network Working Group                                         P. Deutsch
-Request for Comments: 1951                           Aladdin Enterprises
-Category: Informational                                         May 1996
-
-
-        DEFLATE Compressed Data Format Specification version 1.3
-
-Status of This Memo
-
-   This memo provides information for the Internet community.  This memo
-   does not specify an Internet standard of any kind.  Distribution of
-   this memo is unlimited.
-
-IESG Note:
-
-   The IESG takes no position on the validity of any Intellectual
-   Property Rights statements contained in this document.
-
-Notices
-
-   Copyright (c) 1996 L. Peter Deutsch
-
-   Permission is granted to copy and distribute this document for any
-   purpose and without charge, including translations into other
-   languages and incorporation into compilations, provided that the
-   copyright notice and this notice are preserved, and that any
-   substantive changes or deletions from the original are clearly
-   marked.
-
-   A pointer to the latest version of this and related documentation in
-   HTML format can be found at the URL
-   <ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html>.
-
-Abstract
-
-   This specification defines a lossless compressed data format that
-   compresses data using a combination of the LZ77 algorithm and Huffman
-   coding, with efficiency comparable to the best currently available
-   general-purpose compression methods.  The data can be produced or
-   consumed, even for an arbitrarily long sequentially presented input
-   data stream, using only an a priori bounded amount of intermediate
-   storage.  The format can be implemented readily in a manner not
-   covered by patents.
-
-
-
-
-
-
-
-
-Deutsch                      Informational                      [Page 1]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-Table of Contents
-
-   1. Introduction ................................................... 2
-      1.1. Purpose ................................................... 2
-      1.2. Intended audience ......................................... 3
-      1.3. Scope ..................................................... 3
-      1.4. Compliance ................................................ 3
-      1.5.  Definitions of terms and conventions used ................ 3
-      1.6. Changes from previous versions ............................ 4
-   2. Compressed representation overview ............................. 4
-   3. Detailed specification ......................................... 5
-      3.1. Overall conventions ....................................... 5
-          3.1.1. Packing into bytes .................................. 5
-      3.2. Compressed block format ................................... 6
-          3.2.1. Synopsis of prefix and Huffman coding ............... 6
-          3.2.2. Use of Huffman coding in the "deflate" format ....... 7
-          3.2.3. Details of block format ............................. 9
-          3.2.4. Non-compressed blocks (BTYPE=00) ................... 11
-          3.2.5. Compressed blocks (length and distance codes) ...... 11
-          3.2.6. Compression with fixed Huffman codes (BTYPE=01) .... 12
-          3.2.7. Compression with dynamic Huffman codes (BTYPE=10) .. 13
-      3.3. Compliance ............................................... 14
-   4. Compression algorithm details ................................. 14
-   5. References .................................................... 16
-   6. Security Considerations ....................................... 16
-   7. Source code ................................................... 16
-   8. Acknowledgements .............................................. 16
-   9. Author's Address .............................................. 17
-
-1. Introduction
-
-   1.1. Purpose
-
-      The purpose of this specification is to define a lossless
-      compressed data format that:
-          * Is independent of CPU type, operating system, file system,
-            and character set, and hence can be used for interchange;
-          * Can be produced or consumed, even for an arbitrarily long
-            sequentially presented input data stream, using only an a
-            priori bounded amount of intermediate storage, and hence
-            can be used in data communications or similar structures
-            such as Unix filters;
-          * Compresses data with efficiency comparable to the best
-            currently available general-purpose compression methods,
-            and in particular considerably better than the "compress"
-            program;
-          * Can be implemented readily in a manner not covered by
-            patents, and hence can be practiced freely;
-
-
-
-Deutsch                      Informational                      [Page 2]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-          * Is compatible with the file format produced by the current
-            widely used gzip utility, in that conforming decompressors
-            will be able to read data produced by the existing gzip
-            compressor.
-
-      The data format defined by this specification does not attempt to:
-
-          * Allow random access to compressed data;
-          * Compress specialized data (e.g., raster graphics) as well
-            as the best currently available specialized algorithms.
-
-      A simple counting argument shows that no lossless compression
-      algorithm can compress every possible input data set.  For the
-      format defined here, the worst case expansion is 5 bytes per 32K-
-      byte block, i.e., a size increase of 0.015% for large data sets.
-      English text usually compresses by a factor of 2.5 to 3;
-      executable files usually compress somewhat less; graphical data
-      such as raster images may compress much more.
-
-   1.2. Intended audience
-
-      This specification is intended for use by implementors of software
-      to compress data into "deflate" format and/or decompress data from
-      "deflate" format.
-
-      The text of the specification assumes a basic background in
-      programming at the level of bits and other primitive data
-      representations.  Familiarity with the technique of Huffman coding
-      is helpful but not required.
-
-   1.3. Scope
-
-      The specification specifies a method for representing a sequence
-      of bytes as a (usually shorter) sequence of bits, and a method for
-      packing the latter bit sequence into bytes.
-
-   1.4. Compliance
-
-      Unless otherwise indicated below, a compliant decompressor must be
-      able to accept and decompress any data set that conforms to all
-      the specifications presented here; a compliant compressor must
-      produce data sets that conform to all the specifications presented
-      here.
-
-   1.5.  Definitions of terms and conventions used
-
-      Byte: 8 bits stored or transmitted as a unit (same as an octet).
-      For this specification, a byte is exactly 8 bits, even on machines
-
-
-
-Deutsch                      Informational                      [Page 3]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-      which store a character on a number of bits different from eight.
-      See below, for the numbering of bits within a byte.
-
-      String: a sequence of arbitrary bytes.
-
-   1.6. Changes from previous versions
-
-      There have been no technical changes to the deflate format since
-      version 1.1 of this specification.  In version 1.2, some
-      terminology was changed.  Version 1.3 is a conversion of the
-      specification to RFC style.
-
-2. Compressed representation overview
-
-   A compressed data set consists of a series of blocks, corresponding
-   to successive blocks of input data.  The block sizes are arbitrary,
-   except that non-compressible blocks are limited to 65,535 bytes.
-
-   Each block is compressed using a combination of the LZ77 algorithm
-   and Huffman coding. The Huffman trees for each block are independent
-   of those for previous or subsequent blocks; the LZ77 algorithm may
-   use a reference to a duplicated string occurring in a previous block,
-   up to 32K input bytes before.
-
-   Each block consists of two parts: a pair of Huffman code trees that
-   describe the representation of the compressed data part, and a
-   compressed data part.  (The Huffman trees themselves are compressed
-   using Huffman encoding.)  The compressed data consists of a series of
-   elements of two types: literal bytes (of strings that have not been
-   detected as duplicated within the previous 32K input bytes), and
-   pointers to duplicated strings, where a pointer is represented as a
-   pair <length, backward distance>.  The representation used in the
-   "deflate" format limits distances to 32K bytes and lengths to 258
-   bytes, but does not limit the size of a block, except for
-   uncompressible blocks, which are limited as noted above.
-
-   Each type of value (literals, distances, and lengths) in the
-   compressed data is represented using a Huffman code, using one code
-   tree for literals and lengths and a separate code tree for distances.
-   The code trees for each block appear in a compact form just before
-   the compressed data for that block.
-
-
-
-
-
-
-
-
-
-
-Deutsch                      Informational                      [Page 4]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-3. Detailed specification
-
-   3.1. Overall conventions In the diagrams below, a box like this:
-
-         +---+
-         |   | <-- the vertical bars might be missing
-         +---+
-
-      represents one byte; a box like this:
-
-         +==============+
-         |              |
-         +==============+
-
-      represents a variable number of bytes.
-
-      Bytes stored within a computer do not have a "bit order", since
-      they are always treated as a unit.  However, a byte considered as
-      an integer between 0 and 255 does have a most- and least-
-      significant bit, and since we write numbers with the most-
-      significant digit on the left, we also write bytes with the most-
-      significant bit on the left.  In the diagrams below, we number the
-      bits of a byte so that bit 0 is the least-significant bit, i.e.,
-      the bits are numbered:
-
-         +--------+
-         |76543210|
-         +--------+
-
-      Within a computer, a number may occupy multiple bytes.  All
-      multi-byte numbers in the format described here are stored with
-      the least-significant byte first (at the lower memory address).
-      For example, the decimal number 520 is stored as:
-
-             0        1
-         +--------+--------+
-         |00001000|00000010|
-         +--------+--------+
-          ^        ^
-          |        |
-          |        + more significant byte = 2 x 256
-          + less significant byte = 8
-
-      3.1.1. Packing into bytes
-
-         This document does not address the issue of the order in which
-         bits of a byte are transmitted on a bit-sequential medium,
-         since the final data format described here is byte- rather than
-
-
-
-Deutsch                      Informational                      [Page 5]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-         bit-oriented.  However, we describe the compressed block format
-         in below, as a sequence of data elements of various bit
-         lengths, not a sequence of bytes.  We must therefore specify
-         how to pack these data elements into bytes to form the final
-         compressed byte sequence:
-
-             * Data elements are packed into bytes in order of
-               increasing bit number within the byte, i.e., starting
-               with the least-significant bit of the byte.
-             * Data elements other than Huffman codes are packed
-               starting with the least-significant bit of the data
-               element.
-             * Huffman codes are packed starting with the most-
-               significant bit of the code.
-
-         In other words, if one were to print out the compressed data as
-         a sequence of bytes, starting with the first byte at the
-         *right* margin and proceeding to the *left*, with the most-
-         significant bit of each byte on the left as usual, one would be
-         able to parse the result from right to left, with fixed-width
-         elements in the correct MSB-to-LSB order and Huffman codes in
-         bit-reversed order (i.e., with the first bit of the code in the
-         relative LSB position).
-
-   3.2. Compressed block format
-
-      3.2.1. Synopsis of prefix and Huffman coding
-
-         Prefix coding represents symbols from an a priori known
-         alphabet by bit sequences (codes), one code for each symbol, in
-         a manner such that different symbols may be represented by bit
-         sequences of different lengths, but a parser can always parse
-         an encoded string unambiguously symbol-by-symbol.
-
-         We define a prefix code in terms of a binary tree in which the
-         two edges descending from each non-leaf node are labeled 0 and
-         1 and in which the leaf nodes correspond one-for-one with (are
-         labeled with) the symbols of the alphabet; then the code for a
-         symbol is the sequence of 0's and 1's on the edges leading from
-         the root to the leaf labeled with that symbol.  For example:
-
-
-
-
-
-
-
-
-
-
-
-Deutsch                      Informational                      [Page 6]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-                          /\              Symbol    Code
-                         0  1             ------    ----
-                        /    \                A      00
-                       /\     B               B       1
-                      0  1                    C     011
-                     /    \                   D     010
-                    A     /\
-                         0  1
-                        /    \
-                       D      C
-
-         A parser can decode the next symbol from an encoded input
-         stream by walking down the tree from the root, at each step
-         choosing the edge corresponding to the next input bit.
-
-         Given an alphabet with known symbol frequencies, the Huffman
-         algorithm allows the construction of an optimal prefix code
-         (one which represents strings with those symbol frequencies
-         using the fewest bits of any possible prefix codes for that
-         alphabet).  Such a code is called a Huffman code.  (See
-         reference [1] in Chapter 5, references for additional
-         information on Huffman codes.)
-
-         Note that in the "deflate" format, the Huffman codes for the
-         various alphabets must not exceed certain maximum code lengths.
-         This constraint complicates the algorithm for computing code
-         lengths from symbol frequencies.  Again, see Chapter 5,
-         references for details.
-
-      3.2.2. Use of Huffman coding in the "deflate" format
-
-         The Huffman codes used for each alphabet in the "deflate"
-         format have two additional rules:
-
-             * All codes of a given bit length have lexicographically
-               consecutive values, in the same order as the symbols
-               they represent;
-
-             * Shorter codes lexicographically precede longer codes.
-
-
-
-
-
-
-
-
-
-
-
-
-Deutsch                      Informational                      [Page 7]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-         We could recode the example above to follow this rule as
-         follows, assuming that the order of the alphabet is ABCD:
-
-            Symbol  Code
-            ------  ----
-            A       10
-            B       0
-            C       110
-            D       111
-
-         I.e., 0 precedes 10 which precedes 11x, and 110 and 111 are
-         lexicographically consecutive.
-
-         Given this rule, we can define the Huffman code for an alphabet
-         just by giving the bit lengths of the codes for each symbol of
-         the alphabet in order; this is sufficient to determine the
-         actual codes.  In our example, the code is completely defined
-         by the sequence of bit lengths (2, 1, 3, 3).  The following
-         algorithm generates the codes as integers, intended to be read
-         from most- to least-significant bit.  The code lengths are
-         initially in tree[I].Len; the codes are produced in
-         tree[I].Code.
-
-         1)  Count the number of codes for each code length.  Let
-             bl_count[N] be the number of codes of length N, N >= 1.
-
-         2)  Find the numerical value of the smallest code for each
-             code length:
-
-                code = 0;
-                bl_count[0] = 0;
-                for (bits = 1; bits <= MAX_BITS; bits++) {
-                    code = (code + bl_count[bits-1]) << 1;
-                    next_code[bits] = code;
-                }
-
-         3)  Assign numerical values to all codes, using consecutive
-             values for all codes of the same length with the base
-             values determined at step 2. Codes that are never used
-             (which have a bit length of zero) must not be assigned a
-             value.
-
-                for (n = 0;  n <= max_code; n++) {
-                    len = tree[n].Len;
-                    if (len != 0) {
-                        tree[n].Code = next_code[len];
-                        next_code[len]++;
-                    }
-
-
-
-Deutsch                      Informational                      [Page 8]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-                }
-
-         Example:
-
-         Consider the alphabet ABCDEFGH, with bit lengths (3, 3, 3, 3,
-         3, 2, 4, 4).  After step 1, we have:
-
-            N      bl_count[N]
-            -      -----------
-            2      1
-            3      5
-            4      2
-
-         Step 2 computes the following next_code values:
-
-            N      next_code[N]
-            -      ------------
-            1      0
-            2      0
-            3      2
-            4      14
-
-         Step 3 produces the following code values:
-
-            Symbol Length   Code
-            ------ ------   ----
-            A       3        010
-            B       3        011
-            C       3        100
-            D       3        101
-            E       3        110
-            F       2         00
-            G       4       1110
-            H       4       1111
-
-      3.2.3. Details of block format
-
-         Each block of compressed data begins with 3 header bits
-         containing the following data:
-
-            first bit       BFINAL
-            next 2 bits     BTYPE
-
-         Note that the header bits do not necessarily begin on a byte
-         boundary, since a block does not necessarily occupy an integral
-         number of bytes.
-
-
-
-
-
-Deutsch                      Informational                      [Page 9]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-         BFINAL is set if and only if this is the last block of the data
-         set.
-
-         BTYPE specifies how the data are compressed, as follows:
-
-            00 - no compression
-            01 - compressed with fixed Huffman codes
-            10 - compressed with dynamic Huffman codes
-            11 - reserved (error)
-
-         The only difference between the two compressed cases is how the
-         Huffman codes for the literal/length and distance alphabets are
-         defined.
-
-         In all cases, the decoding algorithm for the actual data is as
-         follows:
-
-            do
-               read block header from input stream.
-               if stored with no compression
-                  skip any remaining bits in current partially
-                     processed byte
-                  read LEN and NLEN (see next section)
-                  copy LEN bytes of data to output
-               otherwise
-                  if compressed with dynamic Huffman codes
-                     read representation of code trees (see
-                        subsection below)
-                  loop (until end of block code recognized)
-                     decode literal/length value from input stream
-                     if value < 256
-                        copy value (literal byte) to output stream
-                     otherwise
-                        if value = end of block (256)
-                           break from loop
-                        otherwise (value = 257..285)
-                           decode distance from input stream
-
-                           move backwards distance bytes in the output
-                           stream, and copy length bytes from this
-                           position to the output stream.
-                  end loop
-            while not last block
-
-         Note that a duplicated string reference may refer to a string
-         in a previous block; i.e., the backward distance may cross one
-         or more block boundaries.  However a distance cannot refer past
-         the beginning of the output stream.  (An application using a
-
-
-
-Deutsch                      Informational                     [Page 10]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-         preset dictionary might discard part of the output stream; a
-         distance can refer to that part of the output stream anyway)
-         Note also that the referenced string may overlap the current
-         position; for example, if the last 2 bytes decoded have values
-         X and Y, a string reference with <length = 5, distance = 2>
-         adds X,Y,X,Y,X to the output stream.
-
-         We now specify each compression method in turn.
-
-      3.2.4. Non-compressed blocks (BTYPE=00)
-
-         Any bits of input up to the next byte boundary are ignored.
-         The rest of the block consists of the following information:
-
-              0   1   2   3   4...
-            +---+---+---+---+================================+
-            |  LEN  | NLEN  |... LEN bytes of literal data...|
-            +---+---+---+---+================================+
-
-         LEN is the number of data bytes in the block.  NLEN is the
-         one's complement of LEN.
-
-      3.2.5. Compressed blocks (length and distance codes)
-
-         As noted above, encoded data blocks in the "deflate" format
-         consist of sequences of symbols drawn from three conceptually
-         distinct alphabets: either literal bytes, from the alphabet of
-         byte values (0..255), or <length, backward distance> pairs,
-         where the length is drawn from (3..258) and the distance is
-         drawn from (1..32,768).  In fact, the literal and length
-         alphabets are merged into a single alphabet (0..285), where
-         values 0..255 represent literal bytes, the value 256 indicates
-         end-of-block, and values 257..285 represent length codes
-         (possibly in conjunction with extra bits following the symbol
-         code) as follows:
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-Deutsch                      Informational                     [Page 11]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-                 Extra               Extra               Extra
-            Code Bits Length(s) Code Bits Lengths   Code Bits Length(s)
-            ---- ---- ------     ---- ---- -------   ---- ---- -------
-             257   0     3       267   1   15,16     277   4   67-82
-             258   0     4       268   1   17,18     278   4   83-98
-             259   0     5       269   2   19-22     279   4   99-114
-             260   0     6       270   2   23-26     280   4  115-130
-             261   0     7       271   2   27-30     281   5  131-162
-             262   0     8       272   2   31-34     282   5  163-194
-             263   0     9       273   3   35-42     283   5  195-226
-             264   0    10       274   3   43-50     284   5  227-257
-             265   1  11,12      275   3   51-58     285   0    258
-             266   1  13,14      276   3   59-66
-
-         The extra bits should be interpreted as a machine integer
-         stored with the most-significant bit first, e.g., bits 1110
-         represent the value 14.
-
-                  Extra           Extra               Extra
-             Code Bits Dist  Code Bits   Dist     Code Bits Distance
-             ---- ---- ----  ---- ----  ------    ---- ---- --------
-               0   0    1     10   4     33-48    20    9   1025-1536
-               1   0    2     11   4     49-64    21    9   1537-2048
-               2   0    3     12   5     65-96    22   10   2049-3072
-               3   0    4     13   5     97-128   23   10   3073-4096
-               4   1   5,6    14   6    129-192   24   11   4097-6144
-               5   1   7,8    15   6    193-256   25   11   6145-8192
-               6   2   9-12   16   7    257-384   26   12  8193-12288
-               7   2  13-16   17   7    385-512   27   12 12289-16384
-               8   3  17-24   18   8    513-768   28   13 16385-24576
-               9   3  25-32   19   8   769-1024   29   13 24577-32768
-
-      3.2.6. Compression with fixed Huffman codes (BTYPE=01)
-
-         The Huffman codes for the two alphabets are fixed, and are not
-         represented explicitly in the data.  The Huffman code lengths
-         for the literal/length alphabet are:
-
-                   Lit Value    Bits        Codes
-                   ---------    ----        -----
-                     0 - 143     8          00110000 through
-                                            10111111
-                   144 - 255     9          110010000 through
-                                            111111111
-                   256 - 279     7          0000000 through
-                                            0010111
-                   280 - 287     8          11000000 through
-                                            11000111
-
-
-
-Deutsch                      Informational                     [Page 12]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-         The code lengths are sufficient to generate the actual codes,
-         as described above; we show the codes in the table for added
-         clarity.  Literal/length values 286-287 will never actually
-         occur in the compressed data, but participate in the code
-         construction.
-
-         Distance codes 0-31 are represented by (fixed-length) 5-bit
-         codes, with possible additional bits as shown in the table
-         shown in Paragraph 3.2.5, above.  Note that distance codes 30-
-         31 will never actually occur in the compressed data.
-
-      3.2.7. Compression with dynamic Huffman codes (BTYPE=10)
-
-         The Huffman codes for the two alphabets appear in the block
-         immediately after the header bits and before the actual
-         compressed data, first the literal/length code and then the
-         distance code.  Each code is defined by a sequence of code
-         lengths, as discussed in Paragraph 3.2.2, above.  For even
-         greater compactness, the code length sequences themselves are
-         compressed using a Huffman code.  The alphabet for code lengths
-         is as follows:
-
-               0 - 15: Represent code lengths of 0 - 15
-                   16: Copy the previous code length 3 - 6 times.
-                       The next 2 bits indicate repeat length
-                             (0 = 3, ... , 3 = 6)
-                          Example:  Codes 8, 16 (+2 bits 11),
-                                    16 (+2 bits 10) will expand to
-                                    12 code lengths of 8 (1 + 6 + 5)
-                   17: Repeat a code length of 0 for 3 - 10 times.
-                       (3 bits of length)
-                   18: Repeat a code length of 0 for 11 - 138 times
-                       (7 bits of length)
-
-         A code length of 0 indicates that the corresponding symbol in
-         the literal/length or distance alphabet will not occur in the
-         block, and should not participate in the Huffman code
-         construction algorithm given earlier.  If only one distance
-         code is used, it is encoded using one bit, not zero bits; in
-         this case there is a single code length of one, with one unused
-         code.  One distance code of zero bits means that there are no
-         distance codes used at all (the data is all literals).
-
-         We can now define the format of the block:
-
-               5 Bits: HLIT, # of Literal/Length codes - 257 (257 - 286)
-               5 Bits: HDIST, # of Distance codes - 1        (1 - 32)
-               4 Bits: HCLEN, # of Code Length codes - 4     (4 - 19)
-
-
-
-Deutsch                      Informational                     [Page 13]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-               (HCLEN + 4) x 3 bits: code lengths for the code length
-                  alphabet given just above, in the order: 16, 17, 18,
-                  0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
-
-                  These code lengths are interpreted as 3-bit integers
-                  (0-7); as above, a code length of 0 means the
-                  corresponding symbol (literal/length or distance code
-                  length) is not used.
-
-               HLIT + 257 code lengths for the literal/length alphabet,
-                  encoded using the code length Huffman code
-
-               HDIST + 1 code lengths for the distance alphabet,
-                  encoded using the code length Huffman code
-
-               The actual compressed data of the block,
-                  encoded using the literal/length and distance Huffman
-                  codes
-
-               The literal/length symbol 256 (end of data),
-                  encoded using the literal/length Huffman code
-
-         The code length repeat codes can cross from HLIT + 257 to the
-         HDIST + 1 code lengths.  In other words, all code lengths form
-         a single sequence of HLIT + HDIST + 258 values.
-
-   3.3. Compliance
-
-      A compressor may limit further the ranges of values specified in
-      the previous section and still be compliant; for example, it may
-      limit the range of backward pointers to some value smaller than
-      32K.  Similarly, a compressor may limit the size of blocks so that
-      a compressible block fits in memory.
-
-      A compliant decompressor must accept the full range of possible
-      values defined in the previous section, and must accept blocks of
-      arbitrary size.
-
-4. Compression algorithm details
-
-   While it is the intent of this document to define the "deflate"
-   compressed data format without reference to any particular
-   compression algorithm, the format is related to the compressed
-   formats produced by LZ77 (Lempel-Ziv 1977, see reference [2] below);
-   since many variations of LZ77 are patented, it is strongly
-   recommended that the implementor of a compressor follow the general
-   algorithm presented here, which is known not to be patented per se.
-   The material in this section is not part of the definition of the
-
-
-
-Deutsch                      Informational                     [Page 14]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-   specification per se, and a compressor need not follow it in order to
-   be compliant.
-
-   The compressor terminates a block when it determines that starting a
-   new block with fresh trees would be useful, or when the block size
-   fills up the compressor's block buffer.
-
-   The compressor uses a chained hash table to find duplicated strings,
-   using a hash function that operates on 3-byte sequences.  At any
-   given point during compression, let XYZ be the next 3 input bytes to
-   be examined (not necessarily all different, of course).  First, the
-   compressor examines the hash chain for XYZ.  If the chain is empty,
-   the compressor simply writes out X as a literal byte and advances one
-   byte in the input.  If the hash chain is not empty, indicating that
-   the sequence XYZ (or, if we are unlucky, some other 3 bytes with the
-   same hash function value) has occurred recently, the compressor
-   compares all strings on the XYZ hash chain with the actual input data
-   sequence starting at the current point, and selects the longest
-   match.
-
-   The compressor searches the hash chains starting with the most recent
-   strings, to favor small distances and thus take advantage of the
-   Huffman encoding.  The hash chains are singly linked. There are no
-   deletions from the hash chains; the algorithm simply discards matches
-   that are too old.  To avoid a worst-case situation, very long hash
-   chains are arbitrarily truncated at a certain length, determined by a
-   run-time parameter.
-
-   To improve overall compression, the compressor optionally defers the
-   selection of matches ("lazy matching"): after a match of length N has
-   been found, the compressor searches for a longer match starting at
-   the next input byte.  If it finds a longer match, it truncates the
-   previous match to a length of one (thus producing a single literal
-   byte) and then emits the longer match.  Otherwise, it emits the
-   original match, and, as described above, advances N bytes before
-   continuing.
-
-   Run-time parameters also control this "lazy match" procedure.  If
-   compression ratio is most important, the compressor attempts a
-   complete second search regardless of the length of the first match.
-   In the normal case, if the current match is "long enough", the
-   compressor reduces the search for a longer match, thus speeding up
-   the process.  If speed is most important, the compressor inserts new
-   strings in the hash table only when no match was found, or when the
-   match is not "too long".  This degrades the compression ratio but
-   saves time since there are both fewer insertions and fewer searches.
-
-
-
-
-
-Deutsch                      Informational                     [Page 15]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-5. References
-
-   [1] Huffman, D. A., "A Method for the Construction of Minimum
-       Redundancy Codes", Proceedings of the Institute of Radio
-       Engineers, September 1952, Volume 40, Number 9, pp. 1098-1101.
-
-   [2] Ziv J., Lempel A., "A Universal Algorithm for Sequential Data
-       Compression", IEEE Transactions on Information Theory, Vol. 23,
-       No. 3, pp. 337-343.
-
-   [3] Gailly, J.-L., and Adler, M., ZLIB documentation and sources,
-       available in ftp://ftp.uu.net/pub/archiving/zip/doc/
-
-   [4] Gailly, J.-L., and Adler, M., GZIP documentation and sources,
-       available as gzip-*.tar in ftp://prep.ai.mit.edu/pub/gnu/
-
-   [5] Schwartz, E. S., and Kallick, B. "Generating a canonical prefix
-       encoding." Comm. ACM, 7,3 (Mar. 1964), pp. 166-169.
-
-   [6] Hirschberg and Lelewer, "Efficient decoding of prefix codes,"
-       Comm. ACM, 33,4, April 1990, pp. 449-459.
-
-6. Security Considerations
-
-   Any data compression method involves the reduction of redundancy in
-   the data.  Consequently, any corruption of the data is likely to have
-   severe effects and be difficult to correct.  Uncompressed text, on
-   the other hand, will probably still be readable despite the presence
-   of some corrupted bytes.
-
-   It is recommended that systems using this data format provide some
-   means of validating the integrity of the compressed data.  See
-   reference [3], for example.
-
-7. Source code
-
-   Source code for a C language implementation of a "deflate" compliant
-   compressor and decompressor is available within the zlib package at
-   ftp://ftp.uu.net/pub/archiving/zip/zlib/.
-
-8. Acknowledgements
-
-   Trademarks cited in this document are the property of their
-   respective owners.
-
-   Phil Katz designed the deflate format.  Jean-Loup Gailly and Mark
-   Adler wrote the related software described in this specification.
-   Glenn Randers-Pehrson converted this document to RFC and HTML format.
-
-
-
-Deutsch                      Informational                     [Page 16]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-9. Author's Address
-
-   L. Peter Deutsch
-   Aladdin Enterprises
-   203 Santa Margarita Ave.
-   Menlo Park, CA 94025
-
-   Phone: (415) 322-0103 (AM only)
-   FAX:   (415) 322-1734
-   EMail: <ghost@aladdin.com>
-
-   Questions about the technical content of this specification can be
-   sent by email to:
-
-   Jean-Loup Gailly <gzip@prep.ai.mit.edu> and
-   Mark Adler <madler@alumni.caltech.edu>
-
-   Editorial comments on this specification can be sent by email to:
-
-   L. Peter Deutsch <ghost@aladdin.com> and
-   Glenn Randers-Pehrson <randeg@alumni.rpi.edu>
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-Deutsch                      Informational                     [Page 17]
-
--- a/compat/zlib/doc/rfc1952.txt
+++ b/compat/zlib/doc/rfc1952.txt
@@ -1,675 +0,0 @@
-
-
-
-
-
-
-Network Working Group                                         P. Deutsch
-Request for Comments: 1952                           Aladdin Enterprises
-Category: Informational                                         May 1996
-
-
-               GZIP file format specification version 4.3
-
-Status of This Memo
-
-   This memo provides information for the Internet community.  This memo
-   does not specify an Internet standard of any kind.  Distribution of
-   this memo is unlimited.
-
-IESG Note:
-
-   The IESG takes no position on the validity of any Intellectual
-   Property Rights statements contained in this document.
-
-Notices
-
-   Copyright (c) 1996 L. Peter Deutsch
-
-   Permission is granted to copy and distribute this document for any
-   purpose and without charge, including translations into other
-   languages and incorporation into compilations, provided that the
-   copyright notice and this notice are preserved, and that any
-   substantive changes or deletions from the original are clearly
-   marked.
-
-   A pointer to the latest version of this and related documentation in
-   HTML format can be found at the URL
-   <ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html>.
-
-Abstract
-
-   This specification defines a lossless compressed data format that is
-   compatible with the widely used GZIP utility.  The format includes a
-   cyclic redundancy check value for detecting data corruption.  The
-   format presently uses the DEFLATE method of compression but can be
-   easily extended to use other compression methods.  The format can be
-   implemented readily in a manner not covered by patents.
-
-
-
-
-
-
-
-
-
-
-Deutsch                      Informational                      [Page 1]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-Table of Contents
-
-   1. Introduction ................................................... 2
-      1.1. Purpose ................................................... 2
-      1.2. Intended audience ......................................... 3
-      1.3. Scope ..................................................... 3
-      1.4. Compliance ................................................ 3
-      1.5. Definitions of terms and conventions used ................. 3
-      1.6. Changes from previous versions ............................ 3
-   2. Detailed specification ......................................... 4
-      2.1. Overall conventions ....................................... 4
-      2.2. File format ............................................... 5
-      2.3. Member format ............................................. 5
-          2.3.1. Member header and trailer ........................... 6
-              2.3.1.1. Extra field ................................... 8
-              2.3.1.2. Compliance .................................... 9
-      3. References .................................................. 9
-      4. Security Considerations .................................... 10
-      5. Acknowledgements ........................................... 10
-      6. Author's Address ........................................... 10
-      7. Appendix: Jean-Loup Gailly's gzip utility .................. 11
-      8. Appendix: Sample CRC Code .................................. 11
-
-1. Introduction
-
-   1.1. Purpose
-
-      The purpose of this specification is to define a lossless
-      compressed data format that:
-
-          * Is independent of CPU type, operating system, file system,
-            and character set, and hence can be used for interchange;
-          * Can compress or decompress a data stream (as opposed to a
-            randomly accessible file) to produce another data stream,
-            using only an a priori bounded amount of intermediate
-            storage, and hence can be used in data communications or
-            similar structures such as Unix filters;
-          * Compresses data with efficiency comparable to the best
-            currently available general-purpose compression methods,
-            and in particular considerably better than the "compress"
-            program;
-          * Can be implemented readily in a manner not covered by
-            patents, and hence can be practiced freely;
-          * Is compatible with the file format produced by the current
-            widely used gzip utility, in that conforming decompressors
-            will be able to read data produced by the existing gzip
-            compressor.
-
-
-
-
-Deutsch                      Informational                      [Page 2]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-      The data format defined by this specification does not attempt to:
-
-          * Provide random access to compressed data;
-          * Compress specialized data (e.g., raster graphics) as well as
-            the best currently available specialized algorithms.
-
-   1.2. Intended audience
-
-      This specification is intended for use by implementors of software
-      to compress data into gzip format and/or decompress data from gzip
-      format.
-
-      The text of the specification assumes a basic background in
-      programming at the level of bits and other primitive data
-      representations.
-
-   1.3. Scope
-
-      The specification specifies a compression method and a file format
-      (the latter assuming only that a file can store a sequence of
-      arbitrary bytes).  It does not specify any particular interface to
-      a file system or anything about character sets or encodings
-      (except for file names and comments, which are optional).
-
-   1.4. Compliance
-
-      Unless otherwise indicated below, a compliant decompressor must be
-      able to accept and decompress any file that conforms to all the
-      specifications presented here; a compliant compressor must produce
-      files that conform to all the specifications presented here.  The
-      material in the appendices is not part of the specification per se
-      and is not relevant to compliance.
-
-   1.5. Definitions of terms and conventions used
-
-      byte: 8 bits stored or transmitted as a unit (same as an octet).
-      (For this specification, a byte is exactly 8 bits, even on
-      machines which store a character on a number of bits different
-      from 8.)  See below for the numbering of bits within a byte.
-
-   1.6. Changes from previous versions
-
-      There have been no technical changes to the gzip format since
-      version 4.1 of this specification.  In version 4.2, some
-      terminology was changed, and the sample CRC code was rewritten for
-      clarity and to eliminate the requirement for the caller to do pre-
-      and post-conditioning.  Version 4.3 is a conversion of the
-      specification to RFC style.
-
-
-
-Deutsch                      Informational                      [Page 3]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-2. Detailed specification
-
-   2.1. Overall conventions
-
-      In the diagrams below, a box like this:
-
-         +---+
-         |   | <-- the vertical bars might be missing
-         +---+
-
-      represents one byte; a box like this:
-
-         +==============+
-         |              |
-         +==============+
-
-      represents a variable number of bytes.
-
-      Bytes stored within a computer do not have a "bit order", since
-      they are always treated as a unit.  However, a byte considered as
-      an integer between 0 and 255 does have a most- and least-
-      significant bit, and since we write numbers with the most-
-      significant digit on the left, we also write bytes with the most-
-      significant bit on the left.  In the diagrams below, we number the
-      bits of a byte so that bit 0 is the least-significant bit, i.e.,
-      the bits are numbered:
-
-         +--------+
-         |76543210|
-         +--------+
-
-      This document does not address the issue of the order in which
-      bits of a byte are transmitted on a bit-sequential medium, since
-      the data format described here is byte- rather than bit-oriented.
-
-      Within a computer, a number may occupy multiple bytes.  All
-      multi-byte numbers in the format described here are stored with
-      the least-significant byte first (at the lower memory address).
-      For example, the decimal number 520 is stored as:
-
-             0        1
-         +--------+--------+
-         |00001000|00000010|
-         +--------+--------+
-          ^        ^
-          |        |
-          |        + more significant byte = 2 x 256
-          + less significant byte = 8
-
-
-
-Deutsch                      Informational                      [Page 4]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-   2.2. File format
-
-      A gzip file consists of a series of "members" (compressed data
-      sets).  The format of each member is specified in the following
-      section.  The members simply appear one after another in the file,
-      with no additional information before, between, or after them.
-
-   2.3. Member format
-
-      Each member has the following structure:
-
-         +---+---+---+---+---+---+---+---+---+---+
-         |ID1|ID2|CM |FLG|     MTIME     |XFL|OS | (more-->)
-         +---+---+---+---+---+---+---+---+---+---+
-
-      (if FLG.FEXTRA set)
-
-         +---+---+=================================+
-         | XLEN  |...XLEN bytes of "extra field"...| (more-->)
-         +---+---+=================================+
-
-      (if FLG.FNAME set)
-
-         +=========================================+
-         |...original file name, zero-terminated...| (more-->)
-         +=========================================+
-
-      (if FLG.FCOMMENT set)
-
-         +===================================+
-         |...file comment, zero-terminated...| (more-->)
-         +===================================+
-
-      (if FLG.FHCRC set)
-
-         +---+---+
-         | CRC16 |
-         +---+---+
-
-         +=======================+
-         |...compressed blocks...| (more-->)
-         +=======================+
-
-           0   1   2   3   4   5   6   7
-         +---+---+---+---+---+---+---+---+
-         |     CRC32     |     ISIZE     |
-         +---+---+---+---+---+---+---+---+
-
-
-
-
-Deutsch                      Informational                      [Page 5]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-      2.3.1. Member header and trailer
-
-         ID1 (IDentification 1)
-         ID2 (IDentification 2)
-            These have the fixed values ID1 = 31 (0x1f, \037), ID2 = 139
-            (0x8b, \213), to identify the file as being in gzip format.
-
-         CM (Compression Method)
-            This identifies the compression method used in the file.  CM
-            = 0-7 are reserved.  CM = 8 denotes the "deflate"
-            compression method, which is the one customarily used by
-            gzip and which is documented elsewhere.
-
-         FLG (FLaGs)
-            This flag byte is divided into individual bits as follows:
-
-               bit 0   FTEXT
-               bit 1   FHCRC
-               bit 2   FEXTRA
-               bit 3   FNAME
-               bit 4   FCOMMENT
-               bit 5   reserved
-               bit 6   reserved
-               bit 7   reserved
-
-            If FTEXT is set, the file is probably ASCII text.  This is
-            an optional indication, which the compressor may set by
-            checking a small amount of the input data to see whether any
-            non-ASCII characters are present.  In case of doubt, FTEXT
-            is cleared, indicating binary data. For systems which have
-            different file formats for ascii text and binary data, the
-            decompressor can use FTEXT to choose the appropriate format.
-            We deliberately do not specify the algorithm used to set
-            this bit, since a compressor always has the option of
-            leaving it cleared and a decompressor always has the option
-            of ignoring it and letting some other program handle issues
-            of data conversion.
-
-            If FHCRC is set, a CRC16 for the gzip header is present,
-            immediately before the compressed data. The CRC16 consists
-            of the two least significant bytes of the CRC32 for all
-            bytes of the gzip header up to and not including the CRC16.
-            [The FHCRC bit was never set by versions of gzip up to
-            1.2.4, even though it was documented with a different
-            meaning in gzip 1.2.4.]
-
-            If FEXTRA is set, optional extra fields are present, as
-            described in a following section.
-
-
-
-Deutsch                      Informational                      [Page 6]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-            If FNAME is set, an original file name is present,
-            terminated by a zero byte.  The name must consist of ISO
-            8859-1 (LATIN-1) characters; on operating systems using
-            EBCDIC or any other character set for file names, the name
-            must be translated to the ISO LATIN-1 character set.  This
-            is the original name of the file being compressed, with any
-            directory components removed, and, if the file being
-            compressed is on a file system with case insensitive names,
-            forced to lower case. There is no original file name if the
-            data was compressed from a source other than a named file;
-            for example, if the source was stdin on a Unix system, there
-            is no file name.
-
-            If FCOMMENT is set, a zero-terminated file comment is
-            present.  This comment is not interpreted; it is only
-            intended for human consumption.  The comment must consist of
-            ISO 8859-1 (LATIN-1) characters.  Line breaks should be
-            denoted by a single line feed character (10 decimal).
-
-            Reserved FLG bits must be zero.
-
-         MTIME (Modification TIME)
-            This gives the most recent modification time of the original
-            file being compressed.  The time is in Unix format, i.e.,
-            seconds since 00:00:00 GMT, Jan.  1, 1970.  (Note that this
-            may cause problems for MS-DOS and other systems that use
-            local rather than Universal time.)  If the compressed data
-            did not come from a file, MTIME is set to the time at which
-            compression started.  MTIME = 0 means no time stamp is
-            available.
-
-         XFL (eXtra FLags)
-            These flags are available for use by specific compression
-            methods.  The "deflate" method (CM = 8) sets these flags as
-            follows:
-
-               XFL = 2 - compressor used maximum compression,
-                         slowest algorithm
-               XFL = 4 - compressor used fastest algorithm
-
-         OS (Operating System)
-            This identifies the type of file system on which compression
-            took place.  This may be useful in determining end-of-line
-            convention for text files.  The currently defined values are
-            as follows:
-
-
-
-
-
-
-Deutsch                      Informational                      [Page 7]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-                 0 - FAT filesystem (MS-DOS, OS/2, NT/Win32)
-                 1 - Amiga
-                 2 - VMS (or OpenVMS)
-                 3 - Unix
-                 4 - VM/CMS
-                 5 - Atari TOS
-                 6 - HPFS filesystem (OS/2, NT)
-                 7 - Macintosh
-                 8 - Z-System
-                 9 - CP/M
-                10 - TOPS-20
-                11 - NTFS filesystem (NT)
-                12 - QDOS
-                13 - Acorn RISCOS
-               255 - unknown
-
-         XLEN (eXtra LENgth)
-            If FLG.FEXTRA is set, this gives the length of the optional
-            extra field.  See below for details.
-
-         CRC32 (CRC-32)
-            This contains a Cyclic Redundancy Check value of the
-            uncompressed data computed according to CRC-32 algorithm
-            used in the ISO 3309 standard and in section 8.1.1.6.2 of
-            ITU-T recommendation V.42.  (See http://www.iso.ch for
-            ordering ISO documents. See gopher://info.itu.ch for an
-            online version of ITU-T V.42.)
-
-         ISIZE (Input SIZE)
-            This contains the size of the original (uncompressed) input
-            data modulo 2^32.
-
-      2.3.1.1. Extra field
-
-         If the FLG.FEXTRA bit is set, an "extra field" is present in
-         the header, with total length XLEN bytes.  It consists of a
-         series of subfields, each of the form:
-
-            +---+---+---+---+==================================+
-            |SI1|SI2|  LEN  |... LEN bytes of subfield data ...|
-            +---+---+---+---+==================================+
-
-         SI1 and SI2 provide a subfield ID, typically two ASCII letters
-         with some mnemonic value.  Jean-Loup Gailly
-         <gzip@prep.ai.mit.edu> is maintaining a registry of subfield
-         IDs; please send him any subfield ID you wish to use.  Subfield
-         IDs with SI2 = 0 are reserved for future use.  The following
-         IDs are currently defined:
-
-
-
-Deutsch                      Informational                      [Page 8]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-            SI1         SI2         Data
-            ----------  ----------  ----
-            0x41 ('A')  0x70 ('P')  Apollo file type information
-
-         LEN gives the length of the subfield data, excluding the 4
-         initial bytes.
-
-      2.3.1.2. Compliance
-
-         A compliant compressor must produce files with correct ID1,
-         ID2, CM, CRC32, and ISIZE, but may set all the other fields in
-         the fixed-length part of the header to default values (255 for
-         OS, 0 for all others).  The compressor must set all reserved
-         bits to zero.
-
-         A compliant decompressor must check ID1, ID2, and CM, and
-         provide an error indication if any of these have incorrect
-         values.  It must examine FEXTRA/XLEN, FNAME, FCOMMENT and FHCRC
-         at least so it can skip over the optional fields if they are
-         present.  It need not examine any other part of the header or
-         trailer; in particular, a decompressor may ignore FTEXT and OS
-         and always produce binary output, and still be compliant.  A
-         compliant decompressor must give an error indication if any
-         reserved bit is non-zero, since such a bit could indicate the
-         presence of a new field that would cause subsequent data to be
-         interpreted incorrectly.
-
-3. References
-
-   [1] "Information Processing - 8-bit single-byte coded graphic
-       character sets - Part 1: Latin alphabet No.1" (ISO 8859-1:1987).
-       The ISO 8859-1 (Latin-1) character set is a superset of 7-bit
-       ASCII. Files defining this character set are available as
-       iso_8859-1.* in ftp://ftp.uu.net/graphics/png/documents/
-
-   [2] ISO 3309
-
-   [3] ITU-T recommendation V.42
-
-   [4] Deutsch, L.P.,"DEFLATE Compressed Data Format Specification",
-       available in ftp://ftp.uu.net/pub/archiving/zip/doc/
-
-   [5] Gailly, J.-L., GZIP documentation, available as gzip-*.tar in
-       ftp://prep.ai.mit.edu/pub/gnu/
-
-   [6] Sarwate, D.V., "Computation of Cyclic Redundancy Checks via Table
-       Look-Up", Communications of the ACM, 31(8), pp.1008-1013.
-
-
-
-
-Deutsch                      Informational                      [Page 9]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-   [7] Schwaderer, W.D., "CRC Calculation", April 85 PC Tech Journal,
-       pp.118-133.
-
-   [8] ftp://ftp.adelaide.edu.au/pub/rocksoft/papers/crc_v3.txt,
-       describing the CRC concept.
-
-4. Security Considerations
-
-   Any data compression method involves the reduction of redundancy in
-   the data.  Consequently, any corruption of the data is likely to have
-   severe effects and be difficult to correct.  Uncompressed text, on
-   the other hand, will probably still be readable despite the presence
-   of some corrupted bytes.
-
-   It is recommended that systems using this data format provide some
-   means of validating the integrity of the compressed data, such as by
-   setting and checking the CRC-32 check value.
-
-5. Acknowledgements
-
-   Trademarks cited in this document are the property of their
-   respective owners.
-
-   Jean-Loup Gailly designed the gzip format and wrote, with Mark Adler,
-   the related software described in this specification.  Glenn
-   Randers-Pehrson converted this document to RFC and HTML format.
-
-6. Author's Address
-
-   L. Peter Deutsch
-   Aladdin Enterprises
-   203 Santa Margarita Ave.
-   Menlo Park, CA 94025
-
-   Phone: (415) 322-0103 (AM only)
-   FAX:   (415) 322-1734
-   EMail: <ghost@aladdin.com>
-
-   Questions about the technical content of this specification can be
-   sent by email to:
-
-   Jean-Loup Gailly <gzip@prep.ai.mit.edu> and
-   Mark Adler <madler@alumni.caltech.edu>
-
-   Editorial comments on this specification can be sent by email to:
-
-   L. Peter Deutsch <ghost@aladdin.com> and
-   Glenn Randers-Pehrson <randeg@alumni.rpi.edu>
-
-
-
-Deutsch                      Informational                     [Page 10]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-7. Appendix: Jean-Loup Gailly's gzip utility
-
-   The most widely used implementation of gzip compression, and the
-   original documentation on which this specification is based, were
-   created by Jean-Loup Gailly <gzip@prep.ai.mit.edu>.  Since this
-   implementation is a de facto standard, we mention some more of its
-   features here.  Again, the material in this section is not part of
-   the specification per se, and implementations need not follow it to
-   be compliant.
-
-   When compressing or decompressing a file, gzip preserves the
-   protection, ownership, and modification time attributes on the local
-   file system, since there is no provision for representing protection
-   attributes in the gzip file format itself.  Since the file format
-   includes a modification time, the gzip decompressor provides a
-   command line switch that assigns the modification time from the file,
-   rather than the local modification time of the compressed input, to
-   the decompressed output.
-
-8. Appendix: Sample CRC Code
-
-   The following sample code represents a practical implementation of
-   the CRC (Cyclic Redundancy Check). (See also ISO 3309 and ITU-T V.42
-   for a formal specification.)
-
-   The sample code is in the ANSI C programming language. Non C users
-   may find it easier to read with these hints:
-
-      &      Bitwise AND operator.
-      ^      Bitwise exclusive-OR operator.
-      >>     Bitwise right shift operator. When applied to an
-             unsigned quantity, as here, right shift inserts zero
-             bit(s) at the left.
-      !      Logical NOT operator.
-      ++     "n++" increments the variable n.
-      0xNNN  0x introduces a hexadecimal (base 16) constant.
-             Suffix L indicates a long value (at least 32 bits).
-
-      /* Table of CRCs of all 8-bit messages. */
-      unsigned long crc_table[256];
-
-      /* Flag: has the table been computed? Initially false. */
-      int crc_table_computed = 0;
-
-      /* Make the table for a fast CRC. */
-      void make_crc_table(void)
-      {
-        unsigned long c;
-
-
-
-Deutsch                      Informational                     [Page 11]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-        int n, k;
-        for (n = 0; n < 256; n++) {
-          c = (unsigned long) n;
-          for (k = 0; k < 8; k++) {
-            if (c & 1) {
-              c = 0xedb88320L ^ (c >> 1);
-            } else {
-              c = c >> 1;
-            }
-          }
-          crc_table[n] = c;
-        }
-        crc_table_computed = 1;
-      }
-
-      /*
-         Update a running crc with the bytes buf[0..len-1] and return
-       the updated crc. The crc should be initialized to zero. Pre- and
-       post-conditioning (one's complement) is performed within this
-       function so it shouldn't be done by the caller. Usage example:
-
-         unsigned long crc = 0L;
-
-         while (read_buffer(buffer, length) != EOF) {
-           crc = update_crc(crc, buffer, length);
-         }
-         if (crc != original_crc) error();
-      */
-      unsigned long update_crc(unsigned long crc,
-                      unsigned char *buf, int len)
-      {
-        unsigned long c = crc ^ 0xffffffffL;
-        int n;
-
-        if (!crc_table_computed)
-          make_crc_table();
-        for (n = 0; n < len; n++) {
-          c = crc_table[(c ^ buf[n]) & 0xff] ^ (c >> 8);
-        }
-        return c ^ 0xffffffffL;
-      }
-
-      /* Return the CRC of the bytes buf[0..len-1]. */
-      unsigned long crc(unsigned char *buf, int len)
-      {
-        return update_crc(0L, buf, len);
-      }
-
-
-
-
-Deutsch                      Informational                     [Page 12]
-
--- a/compat/zlib/doc/txtvsbin.txt
+++ b/compat/zlib/doc/txtvsbin.txt
@@ -1,107 +0,0 @@
-A Fast Method for Identifying Plain Text Files
-==============================================
-
-
-Introduction
------------
-
-Given a file coming from an unknown source, it is sometimes desirable
-to find out whether the format of that file is plain text.  Although
-this may appear like a simple task, a fully accurate detection of the
-file type requires heavy-duty semantic analysis on the file contents.
-It is, however, possible to obtain satisfactory results by employing
-various heuristics.
-
-Previous versions of PKZip and other zip-compatible compression tools
-were using a crude detection scheme: if more than 80% (4/5) of the bytes
-found in a certain buffer are within the range [7..127], the file is
-labeled as plain text, otherwise it is labeled as binary.  A prominent
-limitation of this scheme is the restriction to Latin-based alphabets.
-Other alphabets, like Greek, Cyrillic or Asian, make extensive use of
-the bytes within the range [128..255], and texts using these alphabets
-are most often misidentified by this scheme; in other words, the rate
-of false negatives is sometimes too high, which means that the recall
-is low.  Another weakness of this scheme is a reduced precision, due to
-the false positives that may occur when binary files containing large
-amounts of textual characters are misidentified as plain text.
-
-In this article we propose a new, simple detection scheme that features
-a much increased precision and a near-100% recall.  This scheme is
-designed to work on ASCII, Unicode and other ASCII-derived alphabets,
-and it handles single-byte encodings (ISO-8859, MacRoman, KOI8, etc.)
-and variable-sized encodings (ISO-2022, UTF-8, etc.).  Wider encodings
-(UCS-2/UTF-16 and UCS-4/UTF-32) are not handled, however.
-
-
-The Algorithm
-------------
-
-The algorithm works by dividing the set of bytecodes [0..255] into three
-categories:
- The white list of textual bytecodes:
-  9 (TAB), 10 (LF), 13 (CR), 32 (SPACE) to 255.
- The gray list of tolerated bytecodes:
-  7 (BEL), 8 (BS), 11 (VT), 12 (FF), 26 (SUB), 27 (ESC).
- The black list of undesired, non-textual bytecodes:
-  0 (NUL) to 6, 14 to 31.
-
-If a file contains at least one byte that belongs to the white list and
-no byte that belongs to the black list, then the file is categorized as
-plain text; otherwise, it is categorized as binary.  (The boundary case,
-when the file is empty, automatically falls into the latter category.)
-
-
-Rationale
---------
-
-The idea behind this algorithm relies on two observations.
-
-The first observation is that, although the full range of 7-bit codes
-[0..127] is properly specified by the ASCII standard, most control
-characters in the range [0..31] are not used in practice.  The only
-widely-used, almost universally-portable control codes are 9 (TAB),
-10 (LF) and 13 (CR).  There are a few more control codes that are
-recognized on a reduced range of platforms and text viewers/editors:
-7 (BEL), 8 (BS), 11 (VT), 12 (FF), 26 (SUB) and 27 (ESC); but these
-codes are rarely (if ever) used alone, without being accompanied by
-some printable text.  Even the newer, portable text formats such as
-XML avoid using control characters outside the list mentioned here.
-
-The second observation is that most of the binary files tend to contain
-control characters, especially 0 (NUL).  Even though the older text
-detection schemes observe the presence of non-ASCII codes from the range
-[128..255], the precision rarely has to suffer if this upper range is
-labeled as textual, because the files that are genuinely binary tend to
-contain both control characters and codes from the upper range.  On the
-other hand, the upper range needs to be labeled as textual, because it
-is used by virtually all ASCII extensions.  In particular, this range is
-used for encoding non-Latin scripts.
-
-Since there is no counting involved, other than simply observing the
-presence or the absence of some byte values, the algorithm produces
-consistent results, regardless what alphabet encoding is being used.
-(If counting were involved, it could be possible to obtain different
-results on a text encoded, say, using ISO-8859-16 versus UTF-8.)
-
-There is an extra category of plain text files that are "polluted" with
-one or more black-listed codes, either by mistake or by peculiar design
-considerations.  In such cases, a scheme that tolerates a small fraction
-of black-listed codes would provide an increased recall (i.e. more true
-positives).  This, however, incurs a reduced precision overall, since
-false positives are more likely to appear in binary files that contain
-large chunks of textual data.  Furthermore, "polluted" plain text should
-be regarded as binary by general-purpose text detection schemes, because
-general-purpose text processing algorithms might not be applicable.
-Under this premise, it is safe to say that our detection method provides
-a near-100% recall.
-
-Experiments have been run on many files coming from various platforms
-and applications.  We tried plain text files, system logs, source code,
-formatted office documents, compiled object code, etc.  The results
-confirm the optimistic assumptions about the capabilities of this
-algorithm.
-
-
--
-Cosmin Truta
-Last updated: 2006-May-28
--- a/compat/zlib/examples/gun.c
+++ b/compat/zlib/examples/gun.c
@@ -46,7 +46,7 @@
   end-of-file, they cannot be concantenated.  If a Unix compress stream is
   encountered in an input file, it is the last stream in that file.

-   Like gunzip and uncompress, the file attributes of the orignal compressed
+   Like gunzip and uncompress, the file attributes of the original compressed
   file are maintained in the final uncompressed file, to the extent that the
   user permissions allow it.

--- a/compat/zlib/examples/gzlog.c
+++ b/compat/zlib/examples/gzlog.c
@@ -1,6 +1,6 @@
 /*
 * gzlog.c
- * Copyright (C) 2004, 2008, 2012 Mark Adler, all rights reserved
+ * Copyright (C) 2004, 2008, 2012, 2016 Mark Adler, all rights reserved
 * For conditions of distribution and use, see copyright notice in gzlog.h
 * version 2.2, 14 Aug 2012
 */
@@ -243,7 +243,7 @@ typedef unsigned int uint;
 typedef unsigned long ulong;

 /* Macro for debugging to deterministically force recovery operations */
-#ifdef DEBUG
+#ifdef GZLOG_DEBUG
    #include <setjmp.h>         /* longjmp */
    jmp_buf gzlog_jump;         /* where to go back to */
    int gzlog_bail = 0;         /* which point to bail at (1..8) */
--- a/compat/zlib/examples/zran.c
+++ b/compat/zlib/examples/zran.c
@@ -27,7 +27,7 @@
   grows as needed to accommodate the points.

   To use the index, an offset in the uncompressed data is provided, for which
-   the latest accees point at or preceding that offset is located in the index.
+   the latest access point at or preceding that offset is located in the index.
   The input file is positioned to the specified location in the index, and if
   necessary the first few bits of the compressed data is read from the file.
   inflate is initialized with those bits and the 32K of uncompressed data, and
--- a/compat/zlib/gzguts.h
+++ b/compat/zlib/gzguts.h
@@ -1,5 +1,5 @@
 /* gzguts.h -- zlib internal header definitions for gz* operations
- * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
+ * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013, 2016 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -25,6 +25,10 @@
 #  include <stdlib.h>
 #  include <limits.h>
 #endif
+
+#ifndef _POSIX_SOURCE
+#  define _POSIX_SOURCE
+#endif
 #include <fcntl.h>

 #ifdef _WIN32
@@ -35,6 +39,10 @@
 #  include <io.h>
 #endif

+#if defined(_WIN32) || defined(__CYGWIN__)
+#  define WIDECHAR
+#endif
+
 #ifdef WINAPI_FAMILY
 #  define open _open
 #  define read _read
@@ -95,18 +103,19 @@
 #  endif
 #endif

-/* unlike snprintf (which is required in C99, yet still not supported by
-   Microsoft more than a decade later!), _snprintf does not guarantee null
-   termination of the result -- however this is only used in gzlib.c where
+/* unlike snprintf (which is required in C99), _snprintf does not guarantee
+   null termination of the result -- however this is only used in gzlib.c where
   the result is assured to fit in the space provided */
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && _MSC_VER < 1900
 #  define snprintf _snprintf
 #endif

 #ifndef local
 #  define local static
 #endif
-/* compile with -Dlocal if your debugger can't find static symbols */
+/* since "static" is used to mean two completely different things in C, we
+   define "local" for the non-static meaning of "static", for readability
+   (compile with -Dlocal if your debugger can't find static symbols) */

 /* gz* functions always use library allocation functions */
 #ifndef STDC
@@ -170,7 +179,7 @@ typedef struct {
    char *path;             /* path or fd for error messages */
    unsigned size;          /* buffer size, zero if not allocated yet */
    unsigned want;          /* requested buffer size, default is GZBUFSIZE */
-    unsigned char *in;      /* input buffer */
+    unsigned char *in;      /* input buffer (double-sized when writing) */
    unsigned char *out;     /* output buffer (double-sized when reading) */
    int direct;             /* 0 if processing gzip, 1 if transparent */
        /* just for reading */
--- a/compat/zlib/gzlib.c
+++ b/compat/zlib/gzlib.c
@@ -1,11 +1,11 @@
 /* gzlib.c -- zlib functions common to reading and writing gzip files
- * Copyright (C) 2004, 2010, 2011, 2012, 2013 Mark Adler
+ * Copyright (C) 2004-2017 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

 #include "gzguts.h"

-#if defined(_WIN32) && !defined(__BORLANDC__)
+#if defined(_WIN32) && !defined(__BORLANDC__) && !defined(__MINGW32__)
 #  define LSEEK _lseeki64
 #else
 #if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0
@@ -94,7 +94,7 @@ local gzFile gz_open(path, fd, mode)
    const char *mode;
 {
    gz_statep state;
-    size_t len;
+    z_size_t len;
    int oflag;
 #ifdef O_CLOEXEC
    int cloexec = 0;
@@ -188,10 +188,10 @@ local gzFile gz_open(path, fd, mode)
    }

    /* save the path name for error messages */
-#ifdef _WIN32
+#ifdef WIDECHAR
    if (fd == -2) {
        len = wcstombs(NULL, path, 0);
-        if (len == (size_t)-1)
+        if (len == (z_size_t)-1)
            len = 0;
    }
    else
@@ -202,7 +202,7 @@ local gzFile gz_open(path, fd, mode)
        free(state);
        return NULL;
    }
-#ifdef _WIN32
+#ifdef WIDECHAR
    if (fd == -2)
        if (len)
            wcstombs(state->path, path, len + 1);
@@ -211,7 +211,7 @@ local gzFile gz_open(path, fd, mode)
    else
 #endif
 #if !defined(NO_snprintf) && !defined(NO_vsnprintf)
-        snprintf(state->path, len + 1, "%s", (const char *)path);
+        (void)snprintf(state->path, len + 1, "%s", (const char *)path);
 #else
        strcpy(state->path, path);
 #endif
@@ -239,7 +239,7 @@ local gzFile gz_open(path, fd, mode)

    /* open the file with the appropriate flags (or just use fd) */
    state->fd = fd > -1 ? fd : (
-#ifdef _WIN32
+#ifdef WIDECHAR
        fd == -2 ? _wopen(path, oflag, 0666) :
 #endif
        open((const char *)path, oflag, 0666));
@@ -248,8 +248,10 @@ local gzFile gz_open(path, fd, mode)
        free(state);
        return NULL;
    }
-    if (state->mode == GZ_APPEND)
+    if (state->mode == GZ_APPEND) {
+        LSEEK(state->fd, 0, SEEK_END);  /* so gzoffset() is correct */
        state->mode = GZ_WRITE;         /* simplify later checks */
+    }

    /* save the current position for rewinding (only if reading) */
    if (state->mode == GZ_READ) {
@@ -291,7 +293,7 @@ gzFile ZEXPORT gzdopen(fd, mode)
    if (fd == -1 || (path = (char *)malloc(7 + 3 * sizeof(int))) == NULL)
        return NULL;
 #if !defined(NO_snprintf) && !defined(NO_vsnprintf)
-    snprintf(path, 7 + 3 * sizeof(int), "<fd:%d>", fd); /* for debugging */
+    (void)snprintf(path, 7 + 3 * sizeof(int), "<fd:%d>", fd);
 #else
    sprintf(path, "<fd:%d>", fd);   /* for debugging */
 #endif
@@ -301,7 +303,7 @@ gzFile ZEXPORT gzdopen(fd, mode)
 }

 /* -- see zlib.h -- */
-#ifdef _WIN32
+#ifdef WIDECHAR
 gzFile ZEXPORT gzopen_w(path, mode)
    const wchar_t *path;
    const char *mode;
@@ -329,6 +331,8 @@ int ZEXPORT gzbuffer(file, size)
        return -1;

    /* check and set requested size */
+    if ((size << 1) < size)
+        return -1;              /* need to be able to double it */
    if (size < 2)
        size = 2;               /* need two bytes to check magic header */
    state->want = size;
@@ -604,14 +608,13 @@ void ZLIB_INTERNAL gz_error(state, err, msg)
        return;
    }
 #if !defined(NO_snprintf) && !defined(NO_vsnprintf)
-    snprintf(state->msg, strlen(state->path) + strlen(msg) + 3,
+    (void)snprintf(state->msg, strlen(state->path) + strlen(msg) + 3,
                   "%s%s%s", state->path, ": ", msg);
 #else
    strcpy(state->msg, state->path);
    strcat(state->msg, ": ");
    strcat(state->msg, msg);
 #endif
-    return;
 }

 #ifndef INT_MAX
--- a/compat/zlib/gzread.c
+++ b/compat/zlib/gzread.c
@@ -1,5 +1,5 @@
 /* gzread.c -- zlib functions for reading gzip files
- * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
+ * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013, 2016 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -12,6 +12,7 @@ local int gz_look OF((gz_statep));
 local int gz_decomp OF((gz_statep));
 local int gz_fetch OF((gz_statep));
 local int gz_skip OF((gz_statep, z_off64_t));
+local z_size_t gz_read OF((gz_statep, voidp, z_size_t));

 /* Use read() to load a buffer -- return -1 on error, otherwise 0.  Read from
   state->fd, and update state->eof, state->err, and state->msg as appropriate.
@@ -24,13 +25,17 @@ local int gz_load(state, buf, len, have)
    unsigned *have;
 {
    int ret;
+    unsigned get, max = ((unsigned)-1 >> 2) + 1;

    *have = 0;
    do {
-        ret = read(state->fd, buf + *have, len - *have);
+        get = len - *have;
+        if (get > max)
+            get = max;
+        ret = read(state->fd, buf + *have, get);
        if (ret <= 0)
            break;
-        *have += ret;
+        *have += (unsigned)ret;
    } while (*have < len);
    if (ret < 0) {
        gz_error(state, Z_ERRNO, zstrerror());
@@ -94,9 +99,7 @@ local int gz_look(state)
        state->in = (unsigned char *)malloc(state->want);
        state->out = (unsigned char *)malloc(state->want << 1);
        if (state->in == NULL || state->out == NULL) {
-            if (state->out != NULL)
            free(state->out);
-            if (state->in != NULL)
            free(state->in);
            gz_error(state, Z_MEM_ERROR, "out of memory");
            return -1;
@@ -284,33 +287,17 @@ local int gz_skip(state, len)
    return 0;
 }

-/* -- see zlib.h -- */
-int ZEXPORT gzread(file, buf, len)
-    gzFile file;
-    voidp buf;
-    unsigned len;
-{
-    unsigned got, n;
+/* Read len bytes into buf from file, or less than len up to the end of the
+   input.  Return the number of bytes read.  If zero is returned, either the
+   end of file was reached, or there was an error.  state->err must be
+   consulted in that case to determine which. */
+local z_size_t gz_read(state, buf, len)
    gz_statep state;
-    z_streamp strm;
-
-    /* get internal structure */
-    if (file == NULL)
-        return -1;
-    state = (gz_statep)file;
-    strm = &(state->strm);
-
-    /* check that we're reading and that there's no (serious) error */
-    if (state->mode != GZ_READ ||
-            (state->err != Z_OK && state->err != Z_BUF_ERROR))
-        return -1;
-
-    /* since an int is returned, make sure len fits in one, otherwise return
-       with an error (this avoids the flaw in the interface) */
-    if ((int)len < 0) {
-        gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
-        return -1;
-    }
+    voidp buf;
+    z_size_t len;
+{
+    z_size_t got;
+    unsigned n;

    /* if len is zero, avoid unnecessary operations */
    if (len == 0)
@@ -320,32 +307,38 @@ int ZEXPORT gzread(file, buf, len)
    if (state->seek) {
        state->seek = 0;
        if (gz_skip(state, state->skip) == -1)
-            return -1;
+            return 0;
    }

    /* get len bytes to buf, or less than len if at the end */
    got = 0;
    do {
+        /* set n to the maximum amount of len that fits in an unsigned int */
+        n = -1;
+        if (n > len)
+            n = len;
+
        /* first just try copying data from the output buffer */
        if (state->x.have) {
-            n = state->x.have > len ? len : state->x.have;
+            if (state->x.have < n)
+                n = state->x.have;
            memcpy(buf, state->x.next, n);
            state->x.next += n;
            state->x.have -= n;
        }

        /* output buffer empty -- return if we're at the end of the input */
-        else if (state->eof && strm->avail_in == 0) {
+        else if (state->eof && state->strm.avail_in == 0) {
            state->past = 1;        /* tried to read past end */
            break;
        }

        /* need output data -- for small len or new stream load up our output
           buffer */
-        else if (state->how == LOOK || len < (state->size << 1)) {
+        else if (state->how == LOOK || n < (state->size << 1)) {
            /* get more output, looking for header if required */
            if (gz_fetch(state) == -1)
-                return -1;
+                return 0;
            continue;       /* no progress yet -- go back to copy above */
            /* the copy above assures that we will leave with space in the
               output buffer, allowing at least one gzungetc() to succeed */
@@ -353,16 +346,16 @@ int ZEXPORT gzread(file, buf, len)

        /* large len -- read directly into user buffer */
        else if (state->how == COPY) {      /* read directly */
-            if (gz_load(state, (unsigned char *)buf, len, &n) == -1)
-                return -1;
+            if (gz_load(state, (unsigned char *)buf, n, &n) == -1)
+                return 0;
        }

        /* large len -- decompress directly into user buffer */
        else {  /* state->how == GZIP */
-            strm->avail_out = len;
-            strm->next_out = (unsigned char *)buf;
+            state->strm.avail_out = n;
+            state->strm.next_out = (unsigned char *)buf;
            if (gz_decomp(state) == -1)
-                return -1;
+                return 0;
            n = state->x.have;
            state->x.have = 0;
        }
@@ -374,8 +367,75 @@ int ZEXPORT gzread(file, buf, len)
        state->x.pos += n;
    } while (len);

-    /* return number of bytes read into user buffer (will fit in int) */
-    return (int)got;
+    /* return number of bytes read into user buffer */
+    return got;
+}
+
+/* -- see zlib.h -- */
+int ZEXPORT gzread(file, buf, len)
+    gzFile file;
+    voidp buf;
+    unsigned len;
+{
+    gz_statep state;
+
+    /* get internal structure */
+    if (file == NULL)
+        return -1;
+    state = (gz_statep)file;
+
+    /* check that we're reading and that there's no (serious) error */
+    if (state->mode != GZ_READ ||
+            (state->err != Z_OK && state->err != Z_BUF_ERROR))
+        return -1;
+
+    /* since an int is returned, make sure len fits in one, otherwise return
+       with an error (this avoids a flaw in the interface) */
+    if ((int)len < 0) {
+        gz_error(state, Z_STREAM_ERROR, "request does not fit in an int");
+        return -1;
+    }
+
+    /* read len or fewer bytes to buf */
+    len = gz_read(state, buf, len);
+
+    /* check for an error */
+    if (len == 0 && state->err != Z_OK && state->err != Z_BUF_ERROR)
+        return -1;
+
+    /* return the number of bytes read (this is assured to fit in an int) */
+    return (int)len;
+}
+
+/* -- see zlib.h -- */
+z_size_t ZEXPORT gzfread(buf, size, nitems, file)
+    voidp buf;
+    z_size_t size;
+    z_size_t nitems;
+    gzFile file;
+{
+    z_size_t len;
+    gz_statep state;
+
+    /* get internal structure */
+    if (file == NULL)
+        return 0;
+    state = (gz_statep)file;
+
+    /* check that we're reading and that there's no (serious) error */
+    if (state->mode != GZ_READ ||
+            (state->err != Z_OK && state->err != Z_BUF_ERROR))
+        return 0;
+
+    /* compute bytes to read -- error on overflow */
+    len = nitems * size;
+    if (size && len / size != nitems) {
+        gz_error(state, Z_STREAM_ERROR, "request does not fit in a size_t");
+        return 0;
+    }
+
+    /* read len or fewer bytes to buf, return the number of full items read */
+    return len ? gz_read(state, buf, len) / size : 0;
 }

 /* -- see zlib.h -- */
@@ -408,8 +468,8 @@ int ZEXPORT gzgetc(file)
        return *(state->x.next)++;
    }

-    /* nothing there -- try gzread() */
-    ret = gzread(file, buf, 1);
+    /* nothing there -- try gz_read() */
+    ret = gz_read(state, buf, 1);
    return ret < 1 ? -1 : buf[0];
 }

@@ -451,7 +511,7 @@ int ZEXPORT gzungetc(c, file)
    if (state->x.have == 0) {
        state->x.have = 1;
        state->x.next = state->out + (state->size << 1) - 1;
-        state->x.next[0] = c;
+        state->x.next[0] = (unsigned char)c;
        state->x.pos--;
        state->past = 0;
        return c;
@@ -473,7 +533,7 @@ int ZEXPORT gzungetc(c, file)
    }
    state->x.have++;
    state->x.next--;
-    state->x.next[0] = c;
+    state->x.next[0] = (unsigned char)c;
    state->x.pos--;
    state->past = 0;
    return c;
--- a/compat/zlib/gzwrite.c
+++ b/compat/zlib/gzwrite.c
@@ -1,5 +1,5 @@
 /* gzwrite.c -- zlib functions for writing gzip files
- * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
+ * Copyright (C) 2004-2017 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -9,17 +9,19 @@
 local int gz_init OF((gz_statep));
 local int gz_comp OF((gz_statep, int));
 local int gz_zero OF((gz_statep, z_off64_t));
+local z_size_t gz_write OF((gz_statep, voidpc, z_size_t));

 /* Initialize state for writing a gzip file.  Mark initialization by setting
-   state->size to non-zero.  Return -1 on failure or 0 on success. */
+   state->size to non-zero.  Return -1 on a memory allocation failure, or 0 on
+   success. */
 local int gz_init(state)
    gz_statep state;
 {
    int ret;
    z_streamp strm = &(state->strm);

-    /* allocate input buffer */
-    state->in = (unsigned char *)malloc(state->want);
+    /* allocate input buffer (double size for gzprintf) */
+    state->in = (unsigned char *)malloc(state->want << 1);
    if (state->in == NULL) {
        gz_error(state, Z_MEM_ERROR, "out of memory");
        return -1;
@@ -47,6 +49,7 @@ local int gz_init(state)
            gz_error(state, Z_MEM_ERROR, "out of memory");
            return -1;
        }
+        strm->next_in = NULL;
    }

    /* mark state as initialized */
@@ -62,17 +65,17 @@ local int gz_init(state)
 }

 /* Compress whatever is at avail_in and next_in and write to the output file.
-   Return -1 if there is an error writing to the output file, otherwise 0.
-   flush is assumed to be a valid deflate() flush value.  If flush is Z_FINISH,
-   then the deflate() state is reset to start a new gzip stream.  If gz->direct
-   is true, then simply write to the output file without compressing, and
-   ignore flush. */
+   Return -1 if there is an error writing to the output file or if gz_init()
+   fails to allocate memory, otherwise 0.  flush is assumed to be a valid
+   deflate() flush value.  If flush is Z_FINISH, then the deflate() state is
+   reset to start a new gzip stream.  If gz->direct is true, then simply write
+   to the output file without compressing, and ignore flush. */
 local int gz_comp(state, flush)
    gz_statep state;
    int flush;
 {
-    int ret, got;
-    unsigned have;
+    int ret, writ;
+    unsigned have, put, max = ((unsigned)-1 >> 2) + 1;
    z_streamp strm = &(state->strm);

    /* allocate memory if this is the first time through */
@@ -81,12 +84,16 @@ local int gz_comp(state, flush)

    /* write directly if requested */
    if (state->direct) {
-        got = write(state->fd, strm->next_in, strm->avail_in);
-        if (got < 0 || (unsigned)got != strm->avail_in) {
+        while (strm->avail_in) {
+            put = strm->avail_in > max ? max : strm->avail_in;
+            writ = write(state->fd, strm->next_in, put);
+            if (writ < 0) {
                gz_error(state, Z_ERRNO, zstrerror());
                return -1;
            }
-        strm->avail_in = 0;
+            strm->avail_in -= (unsigned)writ;
+            strm->next_in += writ;
+        }
        return 0;
    }

@@ -97,17 +104,21 @@ local int gz_comp(state, flush)
           doing Z_FINISH then don't write until we get to Z_STREAM_END */
        if (strm->avail_out == 0 || (flush != Z_NO_FLUSH &&
            (flush != Z_FINISH || ret == Z_STREAM_END))) {
-            have = (unsigned)(strm->next_out - state->x.next);
-            if (have && ((got = write(state->fd, state->x.next, have)) < 0 ||
-                         (unsigned)got != have)) {
+            while (strm->next_out > state->x.next) {
+                put = strm->next_out - state->x.next > (int)max ? max :
+                      (unsigned)(strm->next_out - state->x.next);
+                writ = write(state->fd, state->x.next, put);
+                if (writ < 0) {
                    gz_error(state, Z_ERRNO, zstrerror());
                    return -1;
                }
+                state->x.next += writ;
+            }
            if (strm->avail_out == 0) {
                strm->avail_out = state->size;
                strm->next_out = state->out;
+                state->x.next = state->out;
            }
-            state->x.next = strm->next_out;
        }

        /* compress */
@@ -129,7 +140,8 @@ local int gz_comp(state, flush)
    return 0;
 }

-/* Compress len zeros to output.  Return -1 on error, 0 on success. */
+/* Compress len zeros to output.  Return -1 on a write error or memory
+   allocation failure by gz_comp(), or 0 on success. */
 local int gz_zero(state, len)
    gz_statep state;
    z_off64_t len;
@@ -161,32 +173,14 @@ local int gz_zero(state, len)
    return 0;
 }

-/* -- see zlib.h -- */
-int ZEXPORT gzwrite(file, buf, len)
-    gzFile file;
-    voidpc buf;
-    unsigned len;
-{
-    unsigned put = len;
+/* Write len bytes from buf to file.  Return the number of bytes written.  If
+   the returned value is less than len, then there was an error. */
+local z_size_t gz_write(state, buf, len)
    gz_statep state;
-    z_streamp strm;
-
-    /* get internal structure */
-    if (file == NULL)
-        return 0;
-    state = (gz_statep)file;
-    strm = &(state->strm);
-
-    /* check that we're writing and that there's no error */
-    if (state->mode != GZ_WRITE || state->err != Z_OK)
-        return 0;
-
-    /* since an int is returned, make sure len fits in one, otherwise return
-       with an error (this avoids the flaw in the interface) */
-    if ((int)len < 0) {
-        gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
-        return 0;
-    }
+    voidpc buf;
+    z_size_t len;
+{
+    z_size_t put = len;

    /* if len is zero, avoid unnecessary operations */
    if (len == 0)
@@ -209,14 +203,15 @@ int ZEXPORT gzwrite(file, buf, len)
        do {
            unsigned have, copy;

-            if (strm->avail_in == 0)
-                strm->next_in = state->in;
-            have = (unsigned)((strm->next_in + strm->avail_in) - state->in);
+            if (state->strm.avail_in == 0)
+                state->strm.next_in = state->in;
+            have = (unsigned)((state->strm.next_in + state->strm.avail_in) -
+                              state->in);
            copy = state->size - have;
            if (copy > len)
                copy = len;
            memcpy(state->in + have, buf, copy);
-            strm->avail_in += copy;
+            state->strm.avail_in += copy;
            state->x.pos += copy;
            buf = (const char *)buf + copy;
            len -= copy;
@@ -226,19 +221,83 @@ int ZEXPORT gzwrite(file, buf, len)
    }
    else {
        /* consume whatever's left in the input buffer */
-        if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
+        if (state->strm.avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
            return 0;

        /* directly compress user buffer to file */
-        strm->avail_in = len;
-        strm->next_in = (z_const Bytef *)buf;
-        state->x.pos += len;
+        state->strm.next_in = (z_const Bytef *)buf;
+        do {
+            unsigned n = (unsigned)-1;
+            if (n > len)
+                n = len;
+            state->strm.avail_in = n;
+            state->x.pos += n;
            if (gz_comp(state, Z_NO_FLUSH) == -1)
                return 0;
+            len -= n;
+        } while (len);
+    }
+
+    /* input was all buffered or compressed */
+    return put;
+}
+
+/* -- see zlib.h -- */
+int ZEXPORT gzwrite(file, buf, len)
+    gzFile file;
+    voidpc buf;
+    unsigned len;
+{
+    gz_statep state;
+
+    /* get internal structure */
+    if (file == NULL)
+        return 0;
+    state = (gz_statep)file;
+
+    /* check that we're writing and that there's no error */
+    if (state->mode != GZ_WRITE || state->err != Z_OK)
+        return 0;
+
+    /* since an int is returned, make sure len fits in one, otherwise return
+       with an error (this avoids a flaw in the interface) */
+    if ((int)len < 0) {
+        gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
+        return 0;
    }

-    /* input was all buffered or compressed (put will fit in int) */
-    return (int)put;
+    /* write len bytes from buf (the return value will fit in an int) */
+    return (int)gz_write(state, buf, len);
+}
+
+/* -- see zlib.h -- */
+z_size_t ZEXPORT gzfwrite(buf, size, nitems, file)
+    voidpc buf;
+    z_size_t size;
+    z_size_t nitems;
+    gzFile file;
+{
+    z_size_t len;
+    gz_statep state;
+
+    /* get internal structure */
+    if (file == NULL)
+        return 0;
+    state = (gz_statep)file;
+
+    /* check that we're writing and that there's no error */
+    if (state->mode != GZ_WRITE || state->err != Z_OK)
+        return 0;
+
+    /* compute bytes to read -- error on overflow */
+    len = nitems * size;
+    if (size && len / size != nitems) {
+        gz_error(state, Z_STREAM_ERROR, "request does not fit in a size_t");
+        return 0;
+    }
+
+    /* write len bytes to buf, return the number of full items written */
+    return len ? gz_write(state, buf, len) / size : 0;
 }

 /* -- see zlib.h -- */
@@ -275,7 +334,7 @@ int ZEXPORT gzputc(file, c)
            strm->next_in = state->in;
        have = (unsigned)((strm->next_in + strm->avail_in) - state->in);
        if (have < state->size) {
-            state->in[have] = c;
+            state->in[have] = (unsigned char)c;
            strm->avail_in++;
            state->x.pos++;
            return c & 0xff;
@@ -283,8 +342,8 @@ int ZEXPORT gzputc(file, c)
    }

    /* no room in buffer or not initialized, use gz_write() */
-    buf[0] = c;
-    if (gzwrite(file, buf, 1) != 1)
+    buf[0] = (unsigned char)c;
+    if (gz_write(state, buf, 1) != 1)
        return -1;
    return c & 0xff;
 }
@@ -295,11 +354,21 @@ int ZEXPORT gzputs(file, str)
    const char *str;
 {
    int ret;
-    unsigned len;
+    z_size_t len;
+    gz_statep state;
+
+    /* get internal structure */
+    if (file == NULL)
+        return -1;
+    state = (gz_statep)file;
+
+    /* check that we're writing and that there's no error */
+    if (state->mode != GZ_WRITE || state->err != Z_OK)
+        return -1;

    /* write string */
-    len = (unsigned)strlen(str);
-    ret = gzwrite(file, str, len);
+    len = strlen(str);
+    ret = gz_write(state, str, len);
    return ret == 0 && len != 0 ? -1 : ret;
 }

@@ -309,63 +378,73 @@ int ZEXPORT gzputs(file, str)
 /* -- see zlib.h -- */
 int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va)
 {
-    int size, len;
+    int len;
+    unsigned left;
+    char *next;
    gz_statep state;
    z_streamp strm;

    /* get internal structure */
    if (file == NULL)
-        return -1;
+        return Z_STREAM_ERROR;
    state = (gz_statep)file;
    strm = &(state->strm);

    /* check that we're writing and that there's no error */
    if (state->mode != GZ_WRITE || state->err != Z_OK)
-        return 0;
+        return Z_STREAM_ERROR;

    /* make sure we have some buffer space */
    if (state->size == 0 && gz_init(state) == -1)
-        return 0;
+        return state->err;

    /* check for seek request */
    if (state->seek) {
        state->seek = 0;
        if (gz_zero(state, state->skip) == -1)
-            return 0;
+            return state->err;
    }

-    /* consume whatever's left in the input buffer */
-    if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
-        return 0;
-
-    /* do the printf() into the input buffer, put length in len */
-    size = (int)(state->size);
-    state->in[size - 1] = 0;
+    /* do the printf() into the input buffer, put length in len -- the input
+       buffer is double-sized just for this function, so there is guaranteed to
+       be state->size bytes available after the current contents */
+    if (strm->avail_in == 0)
+        strm->next_in = state->in;
+    next = (char *)(state->in + (strm->next_in - state->in) + strm->avail_in);
+    next[state->size - 1] = 0;
 #ifdef NO_vsnprintf
 #  ifdef HAS_vsprintf_void
-    (void)vsprintf((char *)(state->in), format, va);
-    for (len = 0; len < size; len++)
-        if (state->in[len] == 0) break;
+    (void)vsprintf(next, format, va);
+    for (len = 0; len < state->size; len++)
+        if (next[len] == 0) break;
 #  else
-    len = vsprintf((char *)(state->in), format, va);
+    len = vsprintf(next, format, va);
 #  endif
 #else
 #  ifdef HAS_vsnprintf_void
-    (void)vsnprintf((char *)(state->in), size, format, va);
-    len = strlen((char *)(state->in));
+    (void)vsnprintf(next, state->size, format, va);
+    len = strlen(next);
 #  else
-    len = vsnprintf((char *)(state->in), size, format, va);
+    len = vsnprintf(next, state->size, format, va);
 #  endif
 #endif

    /* check that printf() results fit in buffer */
-    if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)
+    if (len == 0 || (unsigned)len >= state->size || next[state->size - 1] != 0)
        return 0;

-    /* update buffer and position, defer compression until needed */
-    strm->avail_in = (unsigned)len;
-    strm->next_in = state->in;
+    /* update buffer and position, compress first half if past that */
+    strm->avail_in += (unsigned)len;
    state->x.pos += len;
+    if (strm->avail_in >= state->size) {
+        left = strm->avail_in - state->size;
+        strm->avail_in = state->size;
+        if (gz_comp(state, Z_NO_FLUSH) == -1)
+            return state->err;
+        memcpy(state->in, state->in + state->size, left);
+        strm->next_in = state->in;
+        strm->avail_in = left;
+    }
    return len;
 }

@@ -390,73 +469,82 @@ int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
    int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
        a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
 {
-    int size, len;
+    unsigned len, left;
+    char *next;
    gz_statep state;
    z_streamp strm;

    /* get internal structure */
    if (file == NULL)
-        return -1;
+        return Z_STREAM_ERROR;
    state = (gz_statep)file;
    strm = &(state->strm);

    /* check that can really pass pointer in ints */
    if (sizeof(int) != sizeof(void *))
-        return 0;
+        return Z_STREAM_ERROR;

    /* check that we're writing and that there's no error */
    if (state->mode != GZ_WRITE || state->err != Z_OK)
-        return 0;
+        return Z_STREAM_ERROR;

    /* make sure we have some buffer space */
    if (state->size == 0 && gz_init(state) == -1)
-        return 0;
+        return state->error;

    /* check for seek request */
    if (state->seek) {
        state->seek = 0;
        if (gz_zero(state, state->skip) == -1)
-            return 0;
+            return state->error;
    }

-    /* consume whatever's left in the input buffer */
-    if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
-        return 0;
-
-    /* do the printf() into the input buffer, put length in len */
-    size = (int)(state->size);
-    state->in[size - 1] = 0;
+    /* do the printf() into the input buffer, put length in len -- the input
+       buffer is double-sized just for this function, so there is guaranteed to
+       be state->size bytes available after the current contents */
+    if (strm->avail_in == 0)
+        strm->next_in = state->in;
+    next = (char *)(strm->next_in + strm->avail_in);
+    next[state->size - 1] = 0;
 #ifdef NO_snprintf
 #  ifdef HAS_sprintf_void
-    sprintf((char *)(state->in), format, a1, a2, a3, a4, a5, a6, a7, a8,
-            a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+    sprintf(next, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12,
+            a13, a14, a15, a16, a17, a18, a19, a20);
    for (len = 0; len < size; len++)
-        if (state->in[len] == 0) break;
+        if (next[len] == 0)
+            break;
 #  else
-    len = sprintf((char *)(state->in), format, a1, a2, a3, a4, a5, a6, a7, a8,
-                  a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+    len = sprintf(next, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11,
+                  a12, a13, a14, a15, a16, a17, a18, a19, a20);
 #  endif
 #else
 #  ifdef HAS_snprintf_void
-    snprintf((char *)(state->in), size, format, a1, a2, a3, a4, a5, a6, a7, a8,
-             a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
-    len = strlen((char *)(state->in));
+    snprintf(next, state->size, format, a1, a2, a3, a4, a5, a6, a7, a8, a9,
+             a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+    len = strlen(next);
 #  else
-    len = snprintf((char *)(state->in), size, format, a1, a2, a3, a4, a5, a6,
-                   a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18,
-                   a19, a20);
+    len = snprintf(next, state->size, format, a1, a2, a3, a4, a5, a6, a7, a8,
+                   a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
 #  endif
 #endif

    /* check that printf() results fit in buffer */
-    if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)
+    if (len == 0 || len >= state->size || next[state->size - 1] != 0)
        return 0;

-    /* update buffer and position, defer compression until needed */
-    strm->avail_in = (unsigned)len;
-    strm->next_in = state->in;
+    /* update buffer and position, compress first half if past that */
+    strm->avail_in += len;
    state->x.pos += len;
-    return len;
+    if (strm->avail_in >= state->size) {
+        left = strm->avail_in - state->size;
+        strm->avail_in = state->size;
+        if (gz_comp(state, Z_NO_FLUSH) == -1)
+            return state->err;
+        memcpy(state->in, state->in + state->size, left);
+        strm->next_in = state->in;
+        strm->avail_in = left;
+    }
+    return (int)len;
 }

 #endif
@@ -470,7 +558,7 @@ int ZEXPORT gzflush(file, flush)

    /* get internal structure */
    if (file == NULL)
-        return -1;
+        return Z_STREAM_ERROR;
    state = (gz_statep)file;

    /* check that we're writing and that there's no error */
@@ -485,11 +573,11 @@ int ZEXPORT gzflush(file, flush)
    if (state->seek) {
        state->seek = 0;
        if (gz_zero(state, state->skip) == -1)
-            return -1;
+            return state->err;
    }

    /* compress remaining data with requested flush */
-    gz_comp(state, flush);
+    (void)gz_comp(state, flush);
    return state->err;
 }

@@ -520,13 +608,13 @@ int ZEXPORT gzsetparams(file, level, strategy)
    if (state->seek) {
        state->seek = 0;
        if (gz_zero(state, state->skip) == -1)
-            return -1;
+            return state->err;
    }

    /* change compression parameters for subsequent input */
    if (state->size) {
        /* flush previous input with previous parameters before changing */
-        if (strm->avail_in && gz_comp(state, Z_PARTIAL_FLUSH) == -1)
+        if (strm->avail_in && gz_comp(state, Z_BLOCK) == -1)
            return state->err;
        deflateParams(strm, level, strategy);
    }
--- a/compat/zlib/infback.c
+++ b/compat/zlib/infback.c
@@ -1,5 +1,5 @@
 /* infback.c -- inflate using a call-back interface
- * Copyright (C) 1995-2011 Mark Adler
+ * Copyright (C) 1995-2016 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -61,7 +61,7 @@ int stream_size;
    Tracev((stderr, "inflate: allocated\n"));
    strm->state = (struct internal_state FAR *)state;
    state->dmax = 32768U;
-    state->wbits = windowBits;
+    state->wbits = (uInt)windowBits;
    state->wsize = 1U << windowBits;
    state->window = window;
    state->wnext = 0;
--- a/compat/zlib/inffast.c
+++ b/compat/zlib/inffast.c
@@ -1,5 +1,5 @@
 /* inffast.c -- fast decoding
- * Copyright (C) 1995-2008, 2010, 2013 Mark Adler
+ * Copyright (C) 1995-2017 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -8,26 +8,9 @@
 #include "inflate.h"
 #include "inffast.h"

-#ifndef ASMINF
-
-/* Allow machine dependent optimization for post-increment or pre-increment.
-   Based on testing to date,
-   Pre-increment preferred for:
-   - PowerPC G3 (Adler)
-   - MIPS R5000 (Randers-Pehrson)
-   Post-increment preferred for:
-   - none
-   No measurable difference:
-   - Pentium III (Anderson)
-   - M68060 (Nikl)
- */
-#ifdef POSTINC
-#  define OFF 0
-#  define PUP(a) *(a)++
+#ifdef ASMINF
+#  pragma message("Assembler code may have bugs -- use at your own risk")
 #else
-#  define OFF 1
-#  define PUP(a) *++(a)
-#endif

 /*
   Decode literal, length, and distance codes and write out the resulting
@@ -96,9 +79,9 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */

    /* copy state to local variables */
    state = (struct inflate_state FAR *)strm->state;
-    in = strm->next_in - OFF;
+    in = strm->next_in;
    last = in + (strm->avail_in - 5);
-    out = strm->next_out - OFF;
+    out = strm->next_out;
    beg = out - (start - strm->avail_out);
    end = out + (strm->avail_out - 257);
 #ifdef INFLATE_STRICT
@@ -119,9 +102,9 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
       input data or output space */
    do {
        if (bits < 15) {
-            hold += (unsigned long)(PUP(in)) << bits;
+            hold += (unsigned long)(*in++) << bits;
            bits += 8;
-            hold += (unsigned long)(PUP(in)) << bits;
+            hold += (unsigned long)(*in++) << bits;
            bits += 8;
        }
        here = lcode[hold & lmask];
@@ -134,14 +117,14 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
            Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
                    "inflate:         literal '%c'\n" :
                    "inflate:         literal 0x%02x\n", here.val));
-            PUP(out) = (unsigned char)(here.val);
+            *out++ = (unsigned char)(here.val);
        }
        else if (op & 16) {                     /* length base */
            len = (unsigned)(here.val);
            op &= 15;                           /* number of extra bits */
            if (op) {
                if (bits < op) {
-                    hold += (unsigned long)(PUP(in)) << bits;
+                    hold += (unsigned long)(*in++) << bits;
                    bits += 8;
                }
                len += (unsigned)hold & ((1U << op) - 1);
@@ -150,9 +133,9 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
            }
            Tracevv((stderr, "inflate:         length %u\n", len));
            if (bits < 15) {
-                hold += (unsigned long)(PUP(in)) << bits;
+                hold += (unsigned long)(*in++) << bits;
                bits += 8;
-                hold += (unsigned long)(PUP(in)) << bits;
+                hold += (unsigned long)(*in++) << bits;
                bits += 8;
            }
            here = dcode[hold & dmask];
@@ -165,10 +148,10 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
                dist = (unsigned)(here.val);
                op &= 15;                       /* number of extra bits */
                if (bits < op) {
-                    hold += (unsigned long)(PUP(in)) << bits;
+                    hold += (unsigned long)(*in++) << bits;
                    bits += 8;
                    if (bits < op) {
-                        hold += (unsigned long)(PUP(in)) << bits;
+                        hold += (unsigned long)(*in++) << bits;
                        bits += 8;
                    }
                }
@@ -196,30 +179,30 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
 #ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
                        if (len <= op - whave) {
                            do {
-                                PUP(out) = 0;
+                                *out++ = 0;
                            } while (--len);
                            continue;
                        }
                        len -= op - whave;
                        do {
-                            PUP(out) = 0;
+                            *out++ = 0;
                        } while (--op > whave);
                        if (op == 0) {
                            from = out - dist;
                            do {
-                                PUP(out) = PUP(from);
+                                *out++ = *from++;
                            } while (--len);
                            continue;
                        }
 #endif
                    }
-                    from = window - OFF;
+                    from = window;
                    if (wnext == 0) {           /* very common case */
                        from += wsize - op;
                        if (op < len) {         /* some from window */
                            len -= op;
                            do {
-                                PUP(out) = PUP(from);
+                                *out++ = *from++;
                            } while (--op);
                            from = out - dist;  /* rest from output */
                        }
@@ -230,14 +213,14 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
                        if (op < len) {         /* some from end of window */
                            len -= op;
                            do {
-                                PUP(out) = PUP(from);
+                                *out++ = *from++;
                            } while (--op);
-                            from = window - OFF;
+                            from = window;
                            if (wnext < len) {  /* some from start of window */
                                op = wnext;
                                len -= op;
                                do {
-                                    PUP(out) = PUP(from);
+                                    *out++ = *from++;
                                } while (--op);
                                from = out - dist;      /* rest from output */
                            }
@@ -248,35 +231,35 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
                        if (op < len) {         /* some from window */
                            len -= op;
                            do {
-                                PUP(out) = PUP(from);
+                                *out++ = *from++;
                            } while (--op);
                            from = out - dist;  /* rest from output */
                        }
                    }
                    while (len > 2) {
-                        PUP(out) = PUP(from);
-                        PUP(out) = PUP(from);
-                        PUP(out) = PUP(from);
+                        *out++ = *from++;
+                        *out++ = *from++;
+                        *out++ = *from++;
                        len -= 3;
                    }
                    if (len) {
-                        PUP(out) = PUP(from);
+                        *out++ = *from++;
                        if (len > 1)
-                            PUP(out) = PUP(from);
+                            *out++ = *from++;
                    }
                }
                else {
                    from = out - dist;          /* copy direct from output */
                    do {                        /* minimum length is three */
-                        PUP(out) = PUP(from);
-                        PUP(out) = PUP(from);
-                        PUP(out) = PUP(from);
+                        *out++ = *from++;
+                        *out++ = *from++;
+                        *out++ = *from++;
                        len -= 3;
                    } while (len > 2);
                    if (len) {
-                        PUP(out) = PUP(from);
+                        *out++ = *from++;
                        if (len > 1)
-                            PUP(out) = PUP(from);
+                            *out++ = *from++;
                    }
                }
            }
@@ -313,8 +296,8 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
    hold &= (1U << bits) - 1;

    /* update state and return */
-    strm->next_in = in + OFF;
-    strm->next_out = out + OFF;
+    strm->next_in = in;
+    strm->next_out = out;
    strm->avail_in = (unsigned)(in < last ? 5 + (last - in) : 5 - (in - last));
    strm->avail_out = (unsigned)(out < end ?
                                 257 + (end - out) : 257 - (out - end));
--- a/compat/zlib/inflate.c
+++ b/compat/zlib/inflate.c
@@ -1,5 +1,5 @@
 /* inflate.c -- zlib decompression
- * Copyright (C) 1995-2012 Mark Adler
+ * Copyright (C) 1995-2016 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -92,6 +92,7 @@
 #endif

 /* function prototypes */
+local int inflateStateCheck OF((z_streamp strm));
 local void fixedtables OF((struct inflate_state FAR *state));
 local int updatewindow OF((z_streamp strm, const unsigned char FAR *end,
                           unsigned copy));
@@ -101,12 +102,26 @@ local int updatewindow OF((z_streamp strm, const unsigned char FAR *end,
 local unsigned syncsearch OF((unsigned FAR *have, const unsigned char FAR *buf,
                              unsigned len));

+local int inflateStateCheck(strm)
+z_streamp strm;
+{
+    struct inflate_state FAR *state;
+    if (strm == Z_NULL ||
+        strm->zalloc == (alloc_func)0 || strm->zfree == (free_func)0)
+        return 1;
+    state = (struct inflate_state FAR *)strm->state;
+    if (state == Z_NULL || state->strm != strm ||
+        state->mode < HEAD || state->mode > SYNC)
+        return 1;
+    return 0;
+}
+
 int ZEXPORT inflateResetKeep(strm)
 z_streamp strm;
 {
    struct inflate_state FAR *state;

-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
    state = (struct inflate_state FAR *)strm->state;
    strm->total_in = strm->total_out = state->total = 0;
    strm->msg = Z_NULL;
@@ -131,7 +146,7 @@ z_streamp strm;
 {
    struct inflate_state FAR *state;

-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
    state = (struct inflate_state FAR *)strm->state;
    state->wsize = 0;
    state->whave = 0;
@@ -147,7 +162,7 @@ int windowBits;
    struct inflate_state FAR *state;

    /* get the state */
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
    state = (struct inflate_state FAR *)strm->state;

    /* extract wrap request from windowBits parameter */
@@ -156,7 +171,7 @@ int windowBits;
        windowBits = -windowBits;
    }
    else {
-        wrap = (windowBits >> 4) + 1;
+        wrap = (windowBits >> 4) + 5;
 #ifdef GUNZIP
        if (windowBits < 48)
            windowBits &= 15;
@@ -210,7 +225,9 @@ int stream_size;
    if (state == Z_NULL) return Z_MEM_ERROR;
    Tracev((stderr, "inflate: allocated\n"));
    strm->state = (struct internal_state FAR *)state;
+    state->strm = strm;
    state->window = Z_NULL;
+    state->mode = HEAD;     /* to pass state test in inflateReset2() */
    ret = inflateReset2(strm, windowBits);
    if (ret != Z_OK) {
        ZFREE(strm, state);
@@ -234,17 +251,17 @@ int value;
 {
    struct inflate_state FAR *state;

-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
    state = (struct inflate_state FAR *)strm->state;
    if (bits < 0) {
        state->hold = 0;
        state->bits = 0;
        return Z_OK;
    }
-    if (bits > 16 || state->bits + bits > 32) return Z_STREAM_ERROR;
+    if (bits > 16 || state->bits + (uInt)bits > 32) return Z_STREAM_ERROR;
    value &= (1L << bits) - 1;
-    state->hold += value << state->bits;
-    state->bits += bits;
+    state->hold += (unsigned)value << state->bits;
+    state->bits += (uInt)bits;
    return Z_OK;
 }

@@ -625,7 +642,7 @@ int flush;
    static const unsigned short order[19] = /* permutation of code lengths */
        {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};

-    if (strm == Z_NULL || strm->state == Z_NULL || strm->next_out == Z_NULL ||
+    if (inflateStateCheck(strm) || strm->next_out == Z_NULL ||
        (strm->next_in == Z_NULL && strm->avail_in != 0))
        return Z_STREAM_ERROR;

@@ -645,6 +662,8 @@ int flush;
            NEEDBITS(16);
 #ifdef GUNZIP
            if ((state->wrap & 2) && hold == 0x8b1f) {  /* gzip header */
+                if (state->wbits == 0)
+                    state->wbits = 15;
                state->check = crc32(0L, Z_NULL, 0);
                CRC2(state->check, hold);
                INITBITS();
@@ -672,7 +691,7 @@ int flush;
            len = BITS(4) + 8;
            if (state->wbits == 0)
                state->wbits = len;
-            else if (len > state->wbits) {
+            if (len > 15 || len > state->wbits) {
                strm->msg = (char *)"invalid window size";
                state->mode = BAD;
                break;
@@ -699,14 +718,16 @@ int flush;
            }
            if (state->head != Z_NULL)
                state->head->text = (int)((hold >> 8) & 1);
-            if (state->flags & 0x0200) CRC2(state->check, hold);
+            if ((state->flags & 0x0200) && (state->wrap & 4))
+                CRC2(state->check, hold);
            INITBITS();
            state->mode = TIME;
        case TIME:
            NEEDBITS(32);
            if (state->head != Z_NULL)
                state->head->time = hold;
-            if (state->flags & 0x0200) CRC4(state->check, hold);
+            if ((state->flags & 0x0200) && (state->wrap & 4))
+                CRC4(state->check, hold);
            INITBITS();
            state->mode = OS;
        case OS:
@@ -715,7 +736,8 @@ int flush;
                state->head->xflags = (int)(hold & 0xff);
                state->head->os = (int)(hold >> 8);
            }
-            if (state->flags & 0x0200) CRC2(state->check, hold);
+            if ((state->flags & 0x0200) && (state->wrap & 4))
+                CRC2(state->check, hold);
            INITBITS();
            state->mode = EXLEN;
        case EXLEN:
@@ -724,7 +746,8 @@ int flush;
                state->length = (unsigned)(hold);
                if (state->head != Z_NULL)
                    state->head->extra_len = (unsigned)hold;
-                if (state->flags & 0x0200) CRC2(state->check, hold);
+                if ((state->flags & 0x0200) && (state->wrap & 4))
+                    CRC2(state->check, hold);
                INITBITS();
            }
            else if (state->head != Z_NULL)
@@ -742,7 +765,7 @@ int flush;
                                len + copy > state->head->extra_max ?
                                state->head->extra_max - len : copy);
                    }
-                    if (state->flags & 0x0200)
+                    if ((state->flags & 0x0200) && (state->wrap & 4))
                        state->check = crc32(state->check, next, copy);
                    have -= copy;
                    next += copy;
@@ -761,9 +784,9 @@ int flush;
                    if (state->head != Z_NULL &&
                            state->head->name != Z_NULL &&
                            state->length < state->head->name_max)
-                        state->head->name[state->length++] = len;
+                        state->head->name[state->length++] = (Bytef)len;
                } while (len && copy < have);
-                if (state->flags & 0x0200)
+                if ((state->flags & 0x0200) && (state->wrap & 4))
                    state->check = crc32(state->check, next, copy);
                have -= copy;
                next += copy;
@@ -782,9 +805,9 @@ int flush;
                    if (state->head != Z_NULL &&
                            state->head->comment != Z_NULL &&
                            state->length < state->head->comm_max)
-                        state->head->comment[state->length++] = len;
+                        state->head->comment[state->length++] = (Bytef)len;
                } while (len && copy < have);
-                if (state->flags & 0x0200)
+                if ((state->flags & 0x0200) && (state->wrap & 4))
                    state->check = crc32(state->check, next, copy);
                have -= copy;
                next += copy;
@@ -796,7 +819,7 @@ int flush;
        case HCRC:
            if (state->flags & 0x0200) {
                NEEDBITS(16);
-                if (hold != (state->check & 0xffff)) {
+                if ((state->wrap & 4) && hold != (state->check & 0xffff)) {
                    strm->msg = (char *)"header crc mismatch";
                    state->mode = BAD;
                    break;
@@ -1177,11 +1200,11 @@ int flush;
                out -= left;
                strm->total_out += out;
                state->total += out;
-                if (out)
+                if ((state->wrap & 4) && out)
                    strm->adler = state->check =
                        UPDATE(state->check, put - out, out);
                out = left;
-                if ((
+                if ((state->wrap & 4) && (
 #ifdef GUNZIP
                     state->flags ? hold :
 #endif
@@ -1240,10 +1263,10 @@ int flush;
    strm->total_in += in;
    strm->total_out += out;
    state->total += out;
-    if (state->wrap && out)
+    if ((state->wrap & 4) && out)
        strm->adler = state->check =
            UPDATE(state->check, strm->next_out - out, out);
-    strm->data_type = state->bits + (state->last ? 64 : 0) +
+    strm->data_type = (int)state->bits + (state->last ? 64 : 0) +
                      (state->mode == TYPE ? 128 : 0) +
                      (state->mode == LEN_ || state->mode == COPY_ ? 256 : 0);
    if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
@@ -1255,7 +1278,7 @@ int ZEXPORT inflateEnd(strm)
 z_streamp strm;
 {
    struct inflate_state FAR *state;
-    if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
+    if (inflateStateCheck(strm))
        return Z_STREAM_ERROR;
    state = (struct inflate_state FAR *)strm->state;
    if (state->window != Z_NULL) ZFREE(strm, state->window);
@@ -1273,7 +1296,7 @@ uInt *dictLength;
    struct inflate_state FAR *state;

    /* check state */
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
    state = (struct inflate_state FAR *)strm->state;

    /* copy dictionary */
@@ -1298,7 +1321,7 @@ uInt dictLength;
    int ret;

    /* check state */
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
    state = (struct inflate_state FAR *)strm->state;
    if (state->wrap != 0 && state->mode != DICT)
        return Z_STREAM_ERROR;
@@ -1330,7 +1353,7 @@ gz_headerp head;
    struct inflate_state FAR *state;

    /* check state */
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
    state = (struct inflate_state FAR *)strm->state;
    if ((state->wrap & 2) == 0) return Z_STREAM_ERROR;

@@ -1383,7 +1406,7 @@ z_streamp strm;
    struct inflate_state FAR *state;

    /* check parameters */
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
    state = (struct inflate_state FAR *)strm->state;
    if (strm->avail_in == 0 && state->bits < 8) return Z_BUF_ERROR;

@@ -1430,7 +1453,7 @@ z_streamp strm;
 {
    struct inflate_state FAR *state;

-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
    state = (struct inflate_state FAR *)strm->state;
    return state->mode == STORED && state->bits == 0;
 }
@@ -1445,8 +1468,7 @@ z_streamp source;
    unsigned wsize;

    /* check input */
-    if (dest == Z_NULL || source == Z_NULL || source->state == Z_NULL ||
-        source->zalloc == (alloc_func)0 || source->zfree == (free_func)0)
+    if (inflateStateCheck(source) || dest == Z_NULL)
        return Z_STREAM_ERROR;
    state = (struct inflate_state FAR *)source->state;

@@ -1467,6 +1489,7 @@ z_streamp source;
    /* copy state */
    zmemcpy((voidpf)dest, (voidpf)source, sizeof(z_stream));
    zmemcpy((voidpf)copy, (voidpf)state, sizeof(struct inflate_state));
+    copy->strm = dest;
    if (state->lencode >= state->codes &&
        state->lencode <= state->codes + ENOUGH - 1) {
        copy->lencode = copy->codes + (state->lencode - state->codes);
@@ -1488,25 +1511,51 @@ int subvert;
 {
    struct inflate_state FAR *state;

-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
    state = (struct inflate_state FAR *)strm->state;
-    state->sane = !subvert;
 #ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
+    state->sane = !subvert;
    return Z_OK;
 #else
+    (void)subvert;
    state->sane = 1;
    return Z_DATA_ERROR;
 #endif
 }

+int ZEXPORT inflateValidate(strm, check)
+z_streamp strm;
+int check;
+{
+    struct inflate_state FAR *state;
+
+    if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
+    state = (struct inflate_state FAR *)strm->state;
+    if (check)
+        state->wrap |= 4;
+    else
+        state->wrap &= ~4;
+    return Z_OK;
+}
+
 long ZEXPORT inflateMark(strm)
 z_streamp strm;
 {
    struct inflate_state FAR *state;

-    if (strm == Z_NULL || strm->state == Z_NULL) return -1L << 16;
+    if (inflateStateCheck(strm))
+        return -(1L << 16);
    state = (struct inflate_state FAR *)strm->state;
-    return ((long)(state->back) << 16) +
+    return (long)(((unsigned long)((long)state->back)) << 16) +
        (state->mode == COPY ? state->length :
            (state->mode == MATCH ? state->was - state->length : 0));
 }
+
+unsigned long ZEXPORT inflateCodesUsed(strm)
+z_streamp strm;
+{
+    struct inflate_state FAR *state;
+    if (inflateStateCheck(strm)) return (unsigned long)-1;
+    state = (struct inflate_state FAR *)strm->state;
+    return (unsigned long)(state->next - state->codes);
+}
--- a/compat/zlib/inflate.h
+++ b/compat/zlib/inflate.h
@@ -1,5 +1,5 @@
 /* inflate.h -- internal inflate state definition
- * Copyright (C) 1995-2009 Mark Adler
+ * Copyright (C) 1995-2016 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -18,7 +18,7 @@

 /* Possible inflate modes between inflate() calls */
 typedef enum {
-    HEAD,       /* i: waiting for magic header */
+    HEAD = 16180,   /* i: waiting for magic header */
    FLAGS,      /* i: waiting for method and flags (gzip) */
    TIME,       /* i: waiting for modification time (gzip) */
    OS,         /* i: waiting for extra flags and operating system (gzip) */
@@ -77,11 +77,14 @@ typedef enum {
        CHECK -> LENGTH -> DONE
 */

-/* state maintained between inflate() calls.  Approximately 10K bytes. */
+/* State maintained between inflate() calls -- approximately 7K bytes, not
+   including the allocated sliding window, which is up to 32K bytes. */
 struct inflate_state {
+    z_streamp strm;             /* pointer back to this zlib stream */
    inflate_mode mode;          /* current inflate mode */
    int last;                   /* true if processing last block */
-    int wrap;                   /* bit 0 true for zlib, bit 1 true for gzip */
+    int wrap;                   /* bit 0 true for zlib, bit 1 true for gzip,
+                                   bit 2 true to validate check value */
    int havedict;               /* true if dictionary provided */
    int flags;                  /* gzip header method and flags (0 if zlib) */
    unsigned dmax;              /* zlib header max distance (INFLATE_STRICT) */
--- a/compat/zlib/inftrees.c
+++ b/compat/zlib/inftrees.c
@@ -1,5 +1,5 @@
 /* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2013 Mark Adler
+ * Copyright (C) 1995-2017 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -9,7 +9,7 @@
 #define MAXBITS 15

 const char inflate_copyright[] =
-   " inflate 1.2.8 Copyright 1995-2013 Mark Adler ";
+   " inflate 1.2.11 Copyright 1995-2017 Mark Adler ";
 /*
  If you use the zlib library in a product, an acknowledgment is welcome
  in the documentation of your product. If for some reason you cannot
@@ -54,7 +54,7 @@ unsigned short FAR *work;
    code FAR *next;             /* next available space in table */
    const unsigned short FAR *base;     /* base value table to use */
    const unsigned short FAR *extra;    /* extra bits table to use */
-    int end;                    /* use base and extra for symbol > end */
+    unsigned match;             /* use base and extra for symbol >= match */
    unsigned short count[MAXBITS+1];    /* number of codes of each length */
    unsigned short offs[MAXBITS+1];     /* offsets in table for each length */
    static const unsigned short lbase[31] = { /* Length codes 257..285 base */
@@ -62,7 +62,7 @@ unsigned short FAR *work;
        35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
    static const unsigned short lext[31] = { /* Length codes 257..285 extra */
        16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
-        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 72, 78};
+        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 77, 202};
    static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
        1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
        257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
@@ -181,19 +181,17 @@ unsigned short FAR *work;
    switch (type) {
    case CODES:
        base = extra = work;    /* dummy value--not used */
-        end = 19;
+        match = 20;
        break;
    case LENS:
        base = lbase;
-        base -= 257;
        extra = lext;
-        extra -= 257;
-        end = 256;
+        match = 257;
        break;
    default:    /* DISTS */
        base = dbase;
        extra = dext;
-        end = -1;
+        match = 0;
    }

    /* initialize state for loop */
@@ -216,13 +214,13 @@ unsigned short FAR *work;
    for (;;) {
        /* create table entry */
        here.bits = (unsigned char)(len - drop);
-        if ((int)(work[sym]) < end) {
+        if (work[sym] + 1U < match) {
            here.op = (unsigned char)0;
            here.val = work[sym];
        }
-        else if ((int)(work[sym]) > end) {
-            here.op = (unsigned char)(extra[work[sym]]);
-            here.val = base[work[sym]];
+        else if (work[sym] >= match) {
+            here.op = (unsigned char)(extra[work[sym] - match]);
+            here.val = base[work[sym] - match];
        }
        else {
            here.op = (unsigned char)(32 + 64);         /* end of block */
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Steve Dower	674867e7e6	Import Tcl 8.6.12	2021-11-08 17:30:58 +00:00
Steve Dower	1aadb2455c	Import Tcl 8.6.11	2021-03-30 00:51:39 +01:00
Steve Dower	3bb8e3e086	Import Tcl 8.6.10	2020-09-24 22:53:56 +01:00
Steve Dower	0343d03b22	Merge pull request #4 from csabella/8.6.8-tcl Import Tcl-code 8.6.8	2018-02-23 08:20:05 -08:00
Cheryl Sabella	cc7c413b4f	Import Tcl-code 8.6.8	2018-02-22 14:28:00 -05:00