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Import Tk 8.5.15 (as of svn r89086)

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Zachary Ware
2017-09-04 14:25:47 -05:00
parent 4b29e0458f
commit 27e7dfc7da
883 changed files with 499023 additions and 6 deletions
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411
generic/tkArgv.c Normal file
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/*
* tkArgv.c --
*
* This file contains a function that handles table-based argv-argc
* parsing.
*
* Copyright (c) 1990-1994 The Regents of the University of California.
* Copyright (c) 1994-1997 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 "tkInt.h"
/*
* Default table of argument descriptors. These are normally available in
* every application.
*/
static Tk_ArgvInfo defaultTable[] = {
{"-help", TK_ARGV_HELP, NULL, NULL,
"Print summary of command-line options and abort"},
{NULL, TK_ARGV_END, NULL, NULL, NULL}
};
/*
* Forward declarations for functions defined in this file:
*/
static void PrintUsage(Tcl_Interp *interp, Tk_ArgvInfo *argTable,
int flags);
/*
*----------------------------------------------------------------------
*
* Tk_ParseArgv --
*
* Process an argv array according to a table of expected command-line
* options. See the manual page for more details.
*
* Results:
* The return value is a standard Tcl return value. If an error occurs
* then an error message is left in the interp's result. Under normal
* conditions, both *argcPtr and *argv are modified to return the
* arguments that couldn't be processed here (they didn't match the
* option table, or followed an TK_ARGV_REST argument).
*
* Side effects:
* Variables may be modified, resources may be entered for tkwin, or
* functions may be called. It all depends on the arguments and their
* entries in argTable. See the user documentation for details.
*
*----------------------------------------------------------------------
*/
int
Tk_ParseArgv(
Tcl_Interp *interp, /* Place to store error message. */
Tk_Window tkwin, /* Window to use for setting Tk options. NULL
* means ignore Tk option specs. */
int *argcPtr, /* Number of arguments in argv. Modified to
* hold # args left in argv at end. */
CONST char **argv, /* Array of arguments. Modified to hold those
* that couldn't be processed here. */
Tk_ArgvInfo *argTable, /* Array of option descriptions */
int flags) /* Or'ed combination of various flag bits,
* such as TK_ARGV_NO_DEFAULTS. */
{
register Tk_ArgvInfo *infoPtr;
/* Pointer to the current entry in the table
* of argument descriptions. */
Tk_ArgvInfo *matchPtr; /* Descriptor that matches current argument. */
CONST char *curArg; /* Current argument */
register char c; /* Second character of current arg (used for
* quick check for matching; use 2nd char.
* because first char. will almost always be
* '-'). */
int srcIndex; /* Location from which to read next argument
* from argv. */
int dstIndex; /* Index into argv to which next unused
* argument should be copied (never greater
* than srcIndex). */
int argc; /* # arguments in argv still to process. */
size_t length; /* Number of characters in current argument. */
int i;
if (flags & TK_ARGV_DONT_SKIP_FIRST_ARG) {
srcIndex = dstIndex = 0;
argc = *argcPtr;
} else {
srcIndex = dstIndex = 1;
argc = *argcPtr-1;
}
while (argc > 0) {
curArg = argv[srcIndex];
srcIndex++;
argc--;
length = strlen(curArg);
if (length > 0) {
c = curArg[1];
} else {
c = 0;
}
/*
* Loop throught the argument descriptors searching for one with the
* matching key string. If found, leave a pointer to it in matchPtr.
*/
matchPtr = NULL;
for (i = 0; i < 2; i++) {
if (i == 0) {
infoPtr = argTable;
} else {
infoPtr = defaultTable;
}
for (; (infoPtr != NULL) && (infoPtr->type != TK_ARGV_END);
infoPtr++) {
if (infoPtr->key == NULL) {
continue;
}
if ((infoPtr->key[1] != c)
|| (strncmp(infoPtr->key, curArg, length) != 0)) {
continue;
}
if ((tkwin == NULL)
&& ((infoPtr->type == TK_ARGV_CONST_OPTION)
|| (infoPtr->type == TK_ARGV_OPTION_VALUE)
|| (infoPtr->type == TK_ARGV_OPTION_NAME_VALUE))) {
continue;
}
if (infoPtr->key[length] == 0) {
matchPtr = infoPtr;
goto gotMatch;
}
if (flags & TK_ARGV_NO_ABBREV) {
continue;
}
if (matchPtr != NULL) {
Tcl_AppendResult(interp, "ambiguous option \"", curArg,
"\"", NULL);
return TCL_ERROR;
}
matchPtr = infoPtr;
}
}
if (matchPtr == NULL) {
/*
* Unrecognized argument. Just copy it down, unless the caller
* prefers an error to be registered.
*/
if (flags & TK_ARGV_NO_LEFTOVERS) {
Tcl_AppendResult(interp, "unrecognized argument \"",
curArg, "\"", NULL);
return TCL_ERROR;
}
argv[dstIndex] = curArg;
dstIndex++;
continue;
}
/*
* Take the appropriate action based on the option type
*/
gotMatch:
infoPtr = matchPtr;
switch (infoPtr->type) {
case TK_ARGV_CONSTANT:
*((int *) infoPtr->dst) = PTR2INT(infoPtr->src);
break;
case TK_ARGV_INT:
if (argc == 0) {
goto missingArg;
} else {
char *endPtr;
*((int *) infoPtr->dst) = strtol(argv[srcIndex], &endPtr, 0);
if ((endPtr == argv[srcIndex]) || (*endPtr != 0)) {
Tcl_AppendResult(interp,"expected integer argument for \"",
infoPtr->key, "\" but got \"", argv[srcIndex],
"\"", NULL);
return TCL_ERROR;
}
srcIndex++;
argc--;
}
break;
case TK_ARGV_STRING:
if (argc == 0) {
goto missingArg;
}
*((CONST char **)infoPtr->dst) = argv[srcIndex];
srcIndex++;
argc--;
break;
case TK_ARGV_UID:
if (argc == 0) {
goto missingArg;
}
*((Tk_Uid *)infoPtr->dst) = Tk_GetUid(argv[srcIndex]);
srcIndex++;
argc--;
break;
case TK_ARGV_REST:
*((int *) infoPtr->dst) = dstIndex;
goto argsDone;
case TK_ARGV_FLOAT:
if (argc == 0) {
goto missingArg;
} else {
char *endPtr;
*((double *) infoPtr->dst) = strtod(argv[srcIndex], &endPtr);
if ((endPtr == argv[srcIndex]) || (*endPtr != 0)) {
Tcl_AppendResult(interp, "expected floating-point ",
"argument for \"", infoPtr->key, "\" but got \"",
argv[srcIndex], "\"", NULL);
return TCL_ERROR;
}
srcIndex++;
argc--;
}
break;
case TK_ARGV_FUNC: {
typedef int (ArgvFunc)(char *, char *, CONST char *);
ArgvFunc *handlerProc = (ArgvFunc *) infoPtr->src;
if ((*handlerProc)(infoPtr->dst, infoPtr->key, argv[srcIndex])) {
srcIndex++;
argc--;
}
break;
}
case TK_ARGV_GENFUNC: {
typedef int (ArgvGenFunc)(char *, Tcl_Interp *, char *, int,
CONST char **);
ArgvGenFunc *handlerProc = (ArgvGenFunc *) infoPtr->src;
argc = (*handlerProc)(infoPtr->dst, interp, infoPtr->key,
argc, argv+srcIndex);
if (argc < 0) {
return TCL_ERROR;
}
break;
}
case TK_ARGV_HELP:
PrintUsage(interp, argTable, flags);
return TCL_ERROR;
case TK_ARGV_CONST_OPTION:
Tk_AddOption(tkwin, infoPtr->dst, infoPtr->src,
TK_INTERACTIVE_PRIO);
break;
case TK_ARGV_OPTION_VALUE:
if (argc < 1) {
goto missingArg;
}
Tk_AddOption(tkwin, infoPtr->dst, argv[srcIndex],
TK_INTERACTIVE_PRIO);
srcIndex++;
argc--;
break;
case TK_ARGV_OPTION_NAME_VALUE:
if (argc < 2) {
Tcl_AppendResult(interp, "\"", curArg,
"\" option requires two following arguments", NULL);
return TCL_ERROR;
}
Tk_AddOption(tkwin, argv[srcIndex], argv[srcIndex+1],
TK_INTERACTIVE_PRIO);
srcIndex += 2;
argc -= 2;
break;
default: {
char buf[64 + TCL_INTEGER_SPACE];
sprintf(buf, "bad argument type %d in Tk_ArgvInfo", infoPtr->type);
Tcl_SetResult(interp, buf, TCL_VOLATILE);
return TCL_ERROR;
}
}
}
/*
* If we broke out of the loop because of an OPT_REST argument, copy the
* remaining arguments down.
*/
argsDone:
while (argc) {
argv[dstIndex] = argv[srcIndex];
srcIndex++;
dstIndex++;
argc--;
}
argv[dstIndex] = NULL;
*argcPtr = dstIndex;
return TCL_OK;
missingArg:
Tcl_AppendResult(interp, "\"", curArg,
"\" option requires an additional argument", NULL);
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
* PrintUsage --
*
* Generate a help string describing command-line options.
*
* Results:
* The interp's result will be modified to hold a help string describing
* all the options in argTable, plus all those in the default table
* unless TK_ARGV_NO_DEFAULTS is specified in flags.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static void
PrintUsage(
Tcl_Interp *interp, /* Place information in this interp's result
* area. */
Tk_ArgvInfo *argTable, /* Array of command-specific argument
* descriptions. */
int flags) /* If the TK_ARGV_NO_DEFAULTS bit is set in
* this word, then don't generate information
* for default options. */
{
register Tk_ArgvInfo *infoPtr;
size_t width, i, numSpaces;
char tmp[TCL_DOUBLE_SPACE];
/*
* First, compute the width of the widest option key, so that we can make
* everything line up.
*/
width = 4;
for (i = 0; i < 2; i++) {
for (infoPtr = i ? defaultTable : argTable;
infoPtr->type != TK_ARGV_END; infoPtr++) {
size_t length;
if (infoPtr->key == NULL) {
continue;
}
length = strlen(infoPtr->key);
if (length > width) {
width = length;
}
}
}
Tcl_AppendResult(interp, "Command-specific options:", NULL);
for (i = 0; ; i++) {
for (infoPtr = i ? defaultTable : argTable;
infoPtr->type != TK_ARGV_END; infoPtr++) {
if ((infoPtr->type == TK_ARGV_HELP) && (infoPtr->key == NULL)) {
Tcl_AppendResult(interp, "\n", infoPtr->help, NULL);
continue;
}
Tcl_AppendResult(interp, "\n ", infoPtr->key, ":", NULL);
numSpaces = width + 1 - strlen(infoPtr->key);
while (numSpaces-- > 0) {
Tcl_AppendResult(interp, " ", NULL);
}
Tcl_AppendResult(interp, infoPtr->help, NULL);
switch (infoPtr->type) {
case TK_ARGV_INT:
sprintf(tmp, "%d", *((int *) infoPtr->dst));
Tcl_AppendResult(interp, "\n\t\tDefault value: ", tmp, NULL);
break;
case TK_ARGV_FLOAT:
Tcl_PrintDouble(NULL, *((double *) infoPtr->dst), tmp);
Tcl_AppendResult(interp, "\n\t\tDefault value: ", tmp, NULL);
break;
case TK_ARGV_STRING: {
char *string = *((char **) infoPtr->dst);
if (string != NULL) {
Tcl_AppendResult(interp, "\n\t\tDefault value: \"", string,
"\"", NULL);
}
break;
}
default:
break;
}
}
if ((flags & TK_ARGV_NO_DEFAULTS) || (i > 0)) {
break;
}
Tcl_AppendResult(interp, "\nGeneric options for all commands:", NULL);
}
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/