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114 lines
3.2 KiB
114 lines
3.2 KiB
4 years ago
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/* Support for dynamic loading of extension modules */
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#include "Python.h"
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#include "importdl.h"
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#include <Aliases.h>
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#include <CodeFragments.h>
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#ifdef USE_GUSI1
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#include "TFileSpec.h" /* for Path2FSSpec() */
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#endif
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#include <Files.h>
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#include <TextUtils.h>
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#include "macdefs.h"
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#include "macglue.h"
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const struct filedescr _PyImport_DynLoadFiletab[] = {
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{".slb", "rb", C_EXTENSION},
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{".carbon.slb", "rb", C_EXTENSION},
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{0, 0}
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};
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dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,
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const char *pathname, FILE *fp)
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{
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dl_funcptr p;
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char funcname[258];
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/*
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** Dynamic loading of CFM shared libraries on the Mac. The
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** code has become more convoluted than it was, because we
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** want to be able to put multiple modules in a single
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** file. For this reason, we have to determine the fragment
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** name, and we cannot use the library entry point but we have
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** to locate the correct init routine "by hand".
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*/
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FSSpec libspec;
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CFragConnectionID connID;
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Ptr mainAddr;
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Str255 errMessage;
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OSErr err;
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#ifndef USE_GUSI1
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Boolean isfolder, didsomething;
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#endif
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char buf[512];
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Str63 fragname;
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Ptr symAddr;
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CFragSymbolClass class;
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/* First resolve any aliases to find the real file */
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#ifdef USE_GUSI1
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err = Path2FSSpec(pathname, &libspec);
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#else
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c2pstrcpy((unsigned char *)buf, pathname);
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(void)FSMakeFSSpec(0, 0, (unsigned char *)buf, &libspec);
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err = ResolveAliasFile(&libspec, 1, &isfolder, &didsomething);
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#endif
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if ( err ) {
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PyOS_snprintf(buf, sizeof(buf),
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"%.200s: %.200s", pathname, PyMac_StrError(err));
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PyErr_SetString(PyExc_ImportError, buf);
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return NULL;
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}
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/* Next, determine the fragment name,
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by stripping '.slb' and 'module' */
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memcpy(fragname+1, libspec.name+1, libspec.name[0]);
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fragname[0] = libspec.name[0];
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if( strncmp((char *)(fragname+1+fragname[0]-4),
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".slb", 4) == 0 )
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fragname[0] -= 4;
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if ( strncmp((char *)(fragname+1+fragname[0]-6),
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"module", 6) == 0 )
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fragname[0] -= 6;
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/* Load the fragment
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(or return the connID if it is already loaded */
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err = GetDiskFragment(&libspec, 0, 0, fragname,
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kLoadCFrag, &connID, &mainAddr,
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errMessage);
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if ( err == cfragImportTooOldErr || err == cfragImportTooNewErr ) {
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/*
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** Special-case code: if PythonCore is too old or too new this means
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** the dynamic module was meant for a different Python.
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*/
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if (errMessage[0] == 10 && strncmp((char *)errMessage+1, "PythonCore", 10) == 0 ) {
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PyOS_snprintf(buf, sizeof(buf),
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"Dynamic module was built for %s version of MacPython",
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(err == cfragImportTooOldErr ? "a newer" : "an older"));
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PyErr_SetString(PyExc_ImportError, buf);
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return NULL;
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}
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}
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if ( err ) {
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PyOS_snprintf(buf, sizeof(buf), "%.*s: %.200s",
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errMessage[0], errMessage+1,
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PyMac_StrError(err));
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PyErr_SetString(PyExc_ImportError, buf);
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return NULL;
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}
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/* Locate the address of the correct init function */
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PyOS_snprintf(funcname, sizeof(funcname), "init%.200s", shortname);
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err = FindSymbol(connID, Pstring(funcname), &symAddr, &class);
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if ( err ) {
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PyOS_snprintf(buf, sizeof(buf), "%s: %.200s",
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funcname, PyMac_StrError(err));
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PyErr_SetString(PyExc_ImportError, buf);
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return NULL;
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}
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p = (dl_funcptr)symAddr;
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return p;
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}
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