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128 lines
4.2 KiB
C
128 lines
4.2 KiB
C
/***********************************************************
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Copyright 1991-1997 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI or Corporation for National Research Initiatives or
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CNRI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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While CWI is the initial source for this software, a modified version
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is made available by the Corporation for National Research Initiatives
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(CNRI) at the Internet address ftp://ftp.python.org.
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STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/*
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** Shared library initialization code.
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**
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** This code calls the MetroWerks shared-library initialization code
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** and performs one extra step: it remembers the FSSpec of the file
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** we are loaded from, so we can later call PyMac_AddLibResources to
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** add the file to our resource file chain.
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**
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** This file is needed for PythonCore and for any dynamically loaded
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** module that has interesting resources in its .slb file.
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** Use by replacing __initialize in the "CFM preferences" init field
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** by __initialize_with_resources.
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*/
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#include <Types.h>
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#include <Quickdraw.h>
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#include <SegLoad.h>
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#include <CodeFragments.h>
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#include <Files.h>
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#include <Resources.h>
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/* Defined in the MSL runtime: */
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extern void __initialize(void);
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/* Defined either in macglue.c or in a MPW library: */
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extern pascal int PLstrcmp(unsigned char *, unsigned char *);
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/*
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** Variables passed from shared lib initialization to PyMac_AddLibResources.
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*/
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static int library_fss_valid;
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static FSSpec library_fss;
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/*
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** Routine called upon fragment load. We attempt to save the FSSpec from which we're
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** loaded. We always return noErr (we just continue without the resources).
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*/
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OSErr pascal
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__initialize_with_resources(CFragInitBlockPtr data)
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{
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/* Call the MW runtime's initialization routine */
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__initialize();
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if ( data == nil ) return noErr;
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if ( data->fragLocator.where == kDataForkCFragLocator ) {
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library_fss = *data->fragLocator.u.onDisk.fileSpec;
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library_fss_valid = 1;
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} else if ( data->fragLocator.where == kResourceCFragLocator ) {
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library_fss = *data->fragLocator.u.inSegs.fileSpec;
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library_fss_valid = 1;
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}
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return noErr;
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}
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/*
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** compare two FSSpecs, return true if equal, false if different
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** XXX where could this function live? (jvr)
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*/
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static int
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FSpCompare(FSSpec *fss1, FSSpec *fss2) {
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if (fss1->vRefNum != fss2->vRefNum)
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return 0;
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if (fss1->parID != fss2->parID)
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return 0;
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return !PLstrcmp(fss1->name, fss2->name);
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}
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/* XXX can't include "macglue.h" somehow (jvr) */
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extern FSSpec PyMac_ApplicationFSSpec; /* Application location (from macargv.c) */
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/*
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** Insert the library resources into the search path. Put them after
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** the resources from the application (which we assume is the current
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** resource file). Again, we ignore errors.
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*/
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void
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PyMac_AddLibResources()
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{
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if ( !library_fss_valid || FSpCompare(&library_fss, &PyMac_ApplicationFSSpec))
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return;
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(void)FSpOpenResFile(&library_fss, fsRdPerm);
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}
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/*
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** Dummy main() program to keep linker happy: we want to
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** use the MW AppRuntime in our shared library (better than building
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** custom runtime libraries as we did before) but AppRuntime
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** expects a main program. Note that it
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*/
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#pragma export off
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int
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main(int argc, char **argv) {
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DebugStr("\pCannot happen: PythonCore dummy main called!");
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}
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#pragma export reset
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