Import Tk 8.5.15 (as of svn r89086)

generic/tkStubLib.c

@@ -0,0 +1,140 @@
+/*
+ * tkStubLib.c --
+ *
+ *	Stub object that will be statically linked into extensions that want
+ *	to access Tk.
+ *
+ * Copyright (c) 1998-1999 by Scriptics Corporation.
+ * Copyright (c) 1998 Paul Duffin.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tkInt.h"
+
+#ifdef __WIN32__
+#include "tkWinInt.h"
+#endif
+
+#ifdef MAC_OSX_TK
+#include "tkMacOSXInt.h"
+#endif
+
+#if !(defined(__WIN32__) || defined(MAC_OSX_TK))
+#include "tkUnixInt.h"
+#endif
+
+/* TODO: These ought to come in some other way */
+#include "tkPlatDecls.h"
+#include "tkIntXlibDecls.h"
+
+TkStubs *tkStubsPtr = NULL;
+TkPlatStubs *tkPlatStubsPtr = NULL;
+TkIntStubs *tkIntStubsPtr = NULL;
+TkIntPlatStubs *tkIntPlatStubsPtr = NULL;
+TkIntXlibStubs *tkIntXlibStubsPtr = NULL;
+
+/*
+ * Use our own isdigit to avoid linking to libc on windows
+ */
+
+static int
+isDigit(const int c)
+{
+    return (c >= '0' && c <= '9');
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tk_InitStubs --
+ *
+ *	Checks that the correct version of Tk is loaded and that it supports
+ *	stubs. It then initialises the stub table pointers.
+ *
+ * Results:
+ *	The actual version of Tk that satisfies the request, or NULL to
+ *	indicate that an error occurred.
+ *
+ * Side effects:
+ *	Sets the stub table pointers.
+ *
+ *----------------------------------------------------------------------
+ */
+#undef Tk_InitStubs
+CONST char *
+Tk_InitStubs(
+    Tcl_Interp *interp,
+    CONST char *version,
+    int exact)
+{
+    const char *packageName = "Tk";
+    const char *errMsg = NULL;
+    ClientData clientData = NULL;
+    CONST char *actualVersion = tclStubsPtr->tcl_PkgRequireEx(interp,
+	    packageName, version, 0, &clientData);
+    TkStubs *stubsPtr = (TkStubs *)clientData;
+
+    if (actualVersion == NULL) {
+	return NULL;
+    }
+
+    if (exact) {
+	CONST char *p = version;
+	int count = 0;
+
+	while (*p) {
+	    count += !isDigit(*p++);
+	}
+	if (count == 1) {
+	    CONST char *q = actualVersion;
+
+	    p = version;
+	    while (*p && (*p == *q)) {
+		p++; q++;
+	    }
+	    if (*p || isDigit(*q)) {
+		/* Construct error message */
+		tclStubsPtr->tcl_PkgRequireEx(interp, "Tk", version, 1, NULL);
+		return NULL;
+	    }
+	} else {
+	    actualVersion = tclStubsPtr->tcl_PkgRequireEx(interp, "Tk",
+		    version, 1, NULL);
+	    if (actualVersion == NULL) {
+		return NULL;
+	    }
+	}
+    }
+    if (stubsPtr == NULL) {
+	errMsg = "missing stub table pointer";
+    } else {
+	tkStubsPtr = stubsPtr;
+	if (stubsPtr->hooks) {
+	    tkPlatStubsPtr = stubsPtr->hooks->tkPlatStubs;
+	    tkIntStubsPtr = stubsPtr->hooks->tkIntStubs;
+	    tkIntPlatStubsPtr = stubsPtr->hooks->tkIntPlatStubs;
+	    tkIntXlibStubsPtr = stubsPtr->hooks->tkIntXlibStubs;
+	} else {
+	    tkPlatStubsPtr = NULL;
+	    tkIntStubsPtr = NULL;
+	    tkIntPlatStubsPtr = NULL;
+	    tkIntXlibStubsPtr = NULL;
+	}
+	return actualVersion;
+    }
+    tclStubsPtr->tcl_ResetResult(interp);
+    tclStubsPtr->tcl_AppendResult(interp, "Error loading ", packageName,
+	    " (requested version ", version, ", actual version ",
+	    actualVersion, "): ", errMsg, NULL);
+    return NULL;
+}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */