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dashley |
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/* $Header$ */ |
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/* |
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* tclStubLib.c -- |
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* |
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* Stub object that will be statically linked into extensions that wish |
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* to access Tcl. |
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* |
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* Copyright (c) 1998-1999 by Scriptics Corporation. |
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* Copyright (c) 1998 Paul Duffin. |
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* |
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* See the file "license.terms" for information on usage and redistribution |
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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* |
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* RCS: @(#) $Id: tclstublib.c,v 1.1.1.1 2001/06/13 04:46:23 dtashley Exp $ |
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*/ |
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/* |
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* We need to ensure that we use the stub macros so that this file contains |
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* no references to any of the stub functions. This will make it possible |
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* to build an extension that references Tcl_InitStubs but doesn't end up |
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* including the rest of the stub functions. |
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*/ |
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#ifndef USE_TCL_STUBS |
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#define USE_TCL_STUBS |
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#endif |
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#undef USE_TCL_STUB_PROCS |
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#include "tclInt.h" |
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#include "tclPort.h" |
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/* |
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* Ensure that Tcl_InitStubs is built as an exported symbol. The other stub |
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* functions should be built as non-exported symbols. |
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*/ |
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#undef TCL_STORAGE_CLASS |
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#define TCL_STORAGE_CLASS DLLEXPORT |
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TclStubs *tclStubsPtr; |
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TclPlatStubs *tclPlatStubsPtr; |
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TclIntStubs *tclIntStubsPtr; |
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TclIntPlatStubs *tclIntPlatStubsPtr; |
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static TclStubs * HasStubSupport _ANSI_ARGS_((Tcl_Interp *interp)); |
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static TclStubs * |
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HasStubSupport (interp) |
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Tcl_Interp *interp; |
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{ |
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Interp *iPtr = (Interp *) interp; |
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if (iPtr->stubTable && (iPtr->stubTable->magic == TCL_STUB_MAGIC)) { |
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return iPtr->stubTable; |
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} |
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interp->result = "This interpreter does not support stubs-enabled extensions."; |
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interp->freeProc = TCL_STATIC; |
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return NULL; |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tcl_InitStubs -- |
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* |
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* Tries to initialise the stub table pointers and ensures that |
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* the correct version of Tcl is loaded. |
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* |
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* Results: |
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* The actual version of Tcl that satisfies the request, or |
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* NULL to indicate that an error occurred. |
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* |
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* Side effects: |
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* Sets the stub table pointers. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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#ifdef Tcl_InitStubs |
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#undef Tcl_InitStubs |
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#endif |
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char * |
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Tcl_InitStubs (interp, version, exact) |
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Tcl_Interp *interp; |
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char *version; |
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int exact; |
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{ |
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char *actualVersion; |
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TclStubs *tmp; |
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if (!tclStubsPtr) { |
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tclStubsPtr = HasStubSupport(interp); |
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if (!tclStubsPtr) { |
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return NULL; |
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} |
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} |
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actualVersion = Tcl_PkgRequireEx(interp, "Tcl", version, exact, |
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(ClientData *) &tmp); |
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if (actualVersion == NULL) { |
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tclStubsPtr = NULL; |
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return NULL; |
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} |
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if (tclStubsPtr->hooks) { |
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tclPlatStubsPtr = tclStubsPtr->hooks->tclPlatStubs; |
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tclIntStubsPtr = tclStubsPtr->hooks->tclIntStubs; |
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tclIntPlatStubsPtr = tclStubsPtr->hooks->tclIntPlatStubs; |
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} else { |
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tclPlatStubsPtr = NULL; |
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tclIntStubsPtr = NULL; |
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tclIntPlatStubsPtr = NULL; |
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} |
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return actualVersion; |
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} |
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/* End of tclstublib.c */ |