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/*
* 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"
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.
*
*----------------------------------------------------------------------
*/
#undef Tk_InitStubs
MODULE_SCOPE 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);
const TkStubs *stubsPtr = 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, packageName, version, 1, NULL);
return NULL;
}
} else {
actualVersion = tclStubsPtr->tcl_PkgRequireEx(interp, packageName,
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:
*/
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