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/*
* tkStubLib.c --
*
* Stub object that will be statically linked into extensions that wish
* to access Tk.
*
* Copyright (c) 1998 Paul Duffin.
* Copyright (c) 1998-1999 by Scriptics Corporation.
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tkStubLib.c,v 1.25 2008/04/27 22:38:58 dkf Exp $
*/
/*
* We need to ensure that we use the stub macros so that this file contains no
* references to any of the stub functions. This will make it possible to
* build an extension that references Tk_InitStubs but doesn't end up
* including the rest of the stub functions.
*/
#undef USE_TCL_STUBS
#define USE_TCL_STUBS
#define USE_TK_STUBS
#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"
MODULE_SCOPE const TkStubs *tkStubsPtr;
MODULE_SCOPE const TkPlatStubs *tkPlatStubsPtr;
MODULE_SCOPE const TkIntStubs *tkIntStubsPtr;
MODULE_SCOPE const TkIntPlatStubs *tkIntPlatStubsPtr;
MODULE_SCOPE const TkIntXlibStubs *tkIntXlibStubsPtr;
const TkStubs *tkStubsPtr = NULL;
const TkPlatStubs *tkPlatStubsPtr = NULL;
const TkIntStubs *tkIntStubsPtr = NULL;
const TkIntPlatStubs *tkIntPlatStubsPtr = NULL;
const 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.
*
*----------------------------------------------------------------------
*/
MODULE_SCOPE const char *
Tk_InitStubs(
Tcl_Interp *interp,
const char *version,
int exact)
{
const char *actualVersion;
const TkStubs **stubsPtrPtr = &tkStubsPtr; /* squelch warning */
actualVersion = Tcl_PkgRequireEx(interp, "Tk", version, 0,
(ClientData *) stubsPtrPtr);
if (!actualVersion) {
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) {
/* Construct error message */
Tcl_PkgRequireEx(interp, "Tk", version, 1, NULL);
return NULL;
}
} else {
actualVersion = Tcl_PkgRequireEx(interp, "Tk", version, 1, NULL);
if (actualVersion == NULL) {
return NULL;
}
}
}
if (!tkStubsPtr) {
Tcl_SetResult(interp,
"This implementation of Tk does not support stubs",
TCL_STATIC);
return NULL;
}
tkPlatStubsPtr = tkStubsPtr->hooks->tkPlatStubs;
tkIntStubsPtr = tkStubsPtr->hooks->tkIntStubs;
tkIntPlatStubsPtr = tkStubsPtr->hooks->tkIntPlatStubs;
tkIntXlibStubsPtr = tkStubsPtr->hooks->tkIntXlibStubs;
return actualVersion;
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/
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