Guido van Rossum | 22a1d36 | 1999-12-20 21:18:49 +0000 | [diff] [blame] | 1 | |
| 2 | /* Support for dynamic loading of extension modules */ |
| 3 | |
| 4 | #include "Python.h" |
| 5 | #include "importdl.h" |
| 6 | |
| 7 | #include <Aliases.h> |
| 8 | #include <CodeFragments.h> |
Guido van Rossum | b33aa1a | 2000-04-24 15:08:18 +0000 | [diff] [blame] | 9 | #ifdef USE_GUSI1 |
Guido van Rossum | 22a1d36 | 1999-12-20 21:18:49 +0000 | [diff] [blame] | 10 | #include "TFileSpec.h" /* for Path2FSSpec() */ |
| 11 | #endif |
| 12 | #include <Files.h> |
Jack Jansen | fd0226b | 2000-12-12 22:36:57 +0000 | [diff] [blame^] | 13 | #include <TextUtils.h> |
Guido van Rossum | 22a1d36 | 1999-12-20 21:18:49 +0000 | [diff] [blame] | 14 | #include "macdefs.h" |
| 15 | #include "macglue.h" |
| 16 | |
| 17 | |
| 18 | const struct filedescr _PyImport_DynLoadFiletab[] = { |
| 19 | {".slb", "rb", C_EXTENSION}, |
| 20 | #ifdef __CFM68K__ |
| 21 | {".CFM68K.slb", "rb", C_EXTENSION}, |
| 22 | #else |
| 23 | {".ppc.slb", "rb", C_EXTENSION}, |
| 24 | #endif |
| 25 | {0, 0} |
| 26 | }; |
| 27 | |
| 28 | |
Guido van Rossum | 96a8fb7 | 1999-12-22 14:09:35 +0000 | [diff] [blame] | 29 | dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname, |
Guido van Rossum | 22a1d36 | 1999-12-20 21:18:49 +0000 | [diff] [blame] | 30 | const char *pathname, FILE *fp) |
| 31 | { |
| 32 | dl_funcptr p; |
Guido van Rossum | 96a8fb7 | 1999-12-22 14:09:35 +0000 | [diff] [blame] | 33 | char funcname[258]; |
Guido van Rossum | 22a1d36 | 1999-12-20 21:18:49 +0000 | [diff] [blame] | 34 | |
| 35 | /* |
| 36 | ** Dynamic loading of CFM shared libraries on the Mac. The |
| 37 | ** code has become more convoluted than it was, because we |
| 38 | ** want to be able to put multiple modules in a single |
| 39 | ** file. For this reason, we have to determine the fragment |
| 40 | ** name, and we cannot use the library entry point but we have |
| 41 | ** to locate the correct init routine "by hand". |
| 42 | */ |
| 43 | FSSpec libspec; |
| 44 | CFragConnectionID connID; |
| 45 | Ptr mainAddr; |
| 46 | Str255 errMessage; |
| 47 | OSErr err; |
Guido van Rossum | b33aa1a | 2000-04-24 15:08:18 +0000 | [diff] [blame] | 48 | #ifndef USE_GUSI1 |
Guido van Rossum | 22a1d36 | 1999-12-20 21:18:49 +0000 | [diff] [blame] | 49 | Boolean isfolder, didsomething; |
| 50 | #endif |
| 51 | char buf[512]; |
| 52 | Str63 fragname; |
| 53 | Ptr symAddr; |
| 54 | CFragSymbolClass class; |
| 55 | |
| 56 | /* First resolve any aliases to find the real file */ |
Guido van Rossum | b33aa1a | 2000-04-24 15:08:18 +0000 | [diff] [blame] | 57 | #ifdef USE_GUSI1 |
Guido van Rossum | 22a1d36 | 1999-12-20 21:18:49 +0000 | [diff] [blame] | 58 | err = Path2FSSpec(pathname, &libspec); |
| 59 | #else |
Jack Jansen | fd0226b | 2000-12-12 22:36:57 +0000 | [diff] [blame^] | 60 | c2pstrcpy((unsigned char *)buf, pathname); |
| 61 | (void)FSMakeFSSpec(0, 0, (unsigned char *)buf, &libspec); |
Guido van Rossum | 22a1d36 | 1999-12-20 21:18:49 +0000 | [diff] [blame] | 62 | err = ResolveAliasFile(&libspec, 1, &isfolder, &didsomething); |
| 63 | #endif |
| 64 | if ( err ) { |
Jack Jansen | fd0226b | 2000-12-12 22:36:57 +0000 | [diff] [blame^] | 65 | sprintf(buf, "%.200s: %.200s", pathname, PyMac_StrError(err)); |
Guido van Rossum | 22a1d36 | 1999-12-20 21:18:49 +0000 | [diff] [blame] | 66 | PyErr_SetString(PyExc_ImportError, buf); |
| 67 | return NULL; |
| 68 | } |
| 69 | /* Next, determine the fragment name, |
| 70 | by stripping '.slb' and 'module' */ |
| 71 | memcpy(fragname+1, libspec.name+1, libspec.name[0]); |
| 72 | fragname[0] = libspec.name[0]; |
| 73 | if( strncmp((char *)(fragname+1+fragname[0]-4), |
| 74 | ".slb", 4) == 0 ) |
| 75 | fragname[0] -= 4; |
| 76 | if ( strncmp((char *)(fragname+1+fragname[0]-6), |
| 77 | "module", 6) == 0 ) |
| 78 | fragname[0] -= 6; |
| 79 | /* Load the fragment |
| 80 | (or return the connID if it is already loaded */ |
| 81 | err = GetDiskFragment(&libspec, 0, 0, fragname, |
| 82 | kLoadCFrag, &connID, &mainAddr, |
| 83 | errMessage); |
Guido van Rossum | e817acd | 2000-02-14 17:58:25 +0000 | [diff] [blame] | 84 | if ( err == cfragImportTooOldErr || err == cfragImportTooNewErr ) { |
| 85 | /* |
| 86 | ** Special-case code: if PythonCore is too old or too new this means |
| 87 | ** the dynamic module was meant for a different Python. |
| 88 | */ |
| 89 | if (errMessage[0] == 10 && strncmp((char *)errMessage+1, "PythonCore", 10) == 0 ) { |
| 90 | sprintf(buf, "Dynamic module was built for %s version of MacPython", |
| 91 | (err == cfragImportTooOldErr ? "a newer" : "an older")); |
| 92 | PyErr_SetString(PyExc_ImportError, buf); |
| 93 | return NULL; |
| 94 | } |
| 95 | } |
Guido van Rossum | 22a1d36 | 1999-12-20 21:18:49 +0000 | [diff] [blame] | 96 | if ( err ) { |
| 97 | sprintf(buf, "%.*s: %.200s", |
| 98 | errMessage[0], errMessage+1, |
| 99 | PyMac_StrError(err)); |
| 100 | PyErr_SetString(PyExc_ImportError, buf); |
| 101 | return NULL; |
| 102 | } |
| 103 | /* Locate the address of the correct init function */ |
Guido van Rossum | 96a8fb7 | 1999-12-22 14:09:35 +0000 | [diff] [blame] | 104 | sprintf(funcname, "init%.200s", shortname); |
Guido van Rossum | 22a1d36 | 1999-12-20 21:18:49 +0000 | [diff] [blame] | 105 | err = FindSymbol(connID, Pstring(funcname), &symAddr, &class); |
| 106 | if ( err ) { |
| 107 | sprintf(buf, "%s: %.200s", |
| 108 | funcname, PyMac_StrError(err)); |
| 109 | PyErr_SetString(PyExc_ImportError, buf); |
| 110 | return NULL; |
| 111 | } |
| 112 | p = (dl_funcptr)symAddr; |
| 113 | |
| 114 | return p; |
| 115 | } |