- /*
- * tclStubLib.c --
- *
- * Stub object that will be statically linked into extensions that wish
- * to access Tcl.
- *
- * 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.
- *
- * RCS: @(#) $Id: tclStubLib.c,v 1.6.2.1 2005/11/20 18:23:03 jenglish 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 Tcl_InitStubs but doesn't end up
- * including the rest of the stub functions.
- */
- #ifndef USE_TCL_STUBS
- #define USE_TCL_STUBS
- #endif
- #undef USE_TCL_STUB_PROCS
- #include "tclInt.h"
- #include "tclPort.h"
- /*
- * Ensure that Tcl_InitStubs is built as an exported symbol. The other stub
- * functions should be built as non-exported symbols.
- */
- TclStubs *tclStubsPtr = NULL;
- TclPlatStubs *tclPlatStubsPtr = NULL;
- TclIntStubs *tclIntStubsPtr = NULL;
- TclIntPlatStubs *tclIntPlatStubsPtr = NULL;
- static TclStubs * HasStubSupport _ANSI_ARGS_((Tcl_Interp *interp));
- static TclStubs *
- HasStubSupport (interp)
- Tcl_Interp *interp;
- {
- Interp *iPtr = (Interp *) interp;
- if (iPtr->stubTable && (iPtr->stubTable->magic == TCL_STUB_MAGIC)) {
- return iPtr->stubTable;
- }
- interp->result = "This interpreter does not support stubs-enabled extensions.";
- interp->freeProc = TCL_STATIC;
- return NULL;
- }
- /*
- *----------------------------------------------------------------------
- *
- * Tcl_InitStubs --
- *
- * Tries to initialise the stub table pointers and ensures that
- * the correct version of Tcl is loaded.
- *
- * Results:
- * The actual version of Tcl that satisfies the request, or
- * NULL to indicate that an error occurred.
- *
- * Side effects:
- * Sets the stub table pointers.
- *
- *----------------------------------------------------------------------
- */
- #ifdef Tcl_InitStubs
- #undef Tcl_InitStubs
- #endif
- CONST char *
- Tcl_InitStubs (interp, version, exact)
- Tcl_Interp *interp;
- CONST char *version;
- int exact;
- {
- CONST char *actualVersion = NULL;
- ClientData pkgData = NULL;
- /*
- * We can't optimize this check by caching tclStubsPtr because
- * that prevents apps from being able to load/unload Tcl dynamically
- * multiple times. [Bug 615304]
- */
- tclStubsPtr = HasStubSupport(interp);
- if (!tclStubsPtr) {
- return NULL;
- }
- actualVersion = Tcl_PkgRequireEx(interp, "Tcl", version, exact, &pkgData);
- if (actualVersion == NULL) {
- return NULL;
- }
- tclStubsPtr = (TclStubs*)pkgData;
- if (tclStubsPtr->hooks) {
- tclPlatStubsPtr = tclStubsPtr->hooks->tclPlatStubs;
- tclIntStubsPtr = tclStubsPtr->hooks->tclIntStubs;
- tclIntPlatStubsPtr = tclStubsPtr->hooks->tclIntPlatStubs;
- } else {
- tclPlatStubsPtr = NULL;
- tclIntStubsPtr = NULL;
- tclIntPlatStubsPtr = NULL;
- }
- return actualVersion;
- }