Mercurial > cpython-lru_cache-weakref

annotate Python/dynload_mac.c @ 18065:889db6d55506 legacy-trunk

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SF bug 430991: wrong co_lnotab Armin Rigo pointed out that the way the line-# table got built didn't work for lines generating more than 255 bytes of bytecode. Fixed as he suggested, plus corresponding changes to pyassem.py, plus added some long overdue docs about this subtle table to compile.c. Bugfix candidate (line numbers may be off in tracebacks under -O).
author Tim Peters <tim.peters@gmail.com>
date Sat, 09 Jun 2001 09:26:21 +0000
parents 64fab0047a14
children 379fc66f4c96
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 /* Support for dynamic loading of extension modules */
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3
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4 #include "Python.h"
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5 #include "importdl.h"
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6
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7 #include <Aliases.h>
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8 #include <CodeFragments.h>
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9 #ifdef USE_GUSI1
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10 #include "TFileSpec.h" /* for Path2FSSpec() */
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11 #endif
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12 #include <Files.h>
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13 #include <TextUtils.h>
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14 #include "macdefs.h"
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15 #include "macglue.h"
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16
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17
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18 const struct filedescr _PyImport_DynLoadFiletab[] = {
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19 {".slb", "rb", C_EXTENSION},
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20 #ifdef __CFM68K__
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21 {".CFM68K.slb", "rb", C_EXTENSION},
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22 #else
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23 #if TARGET_API_MAC_CARBON
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24 {".carbon.slb", "rb", C_EXTENSION},
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25 #else
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26 {".ppc.slb", "rb", C_EXTENSION},
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27 #endif
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28 #endif
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29 {0, 0}
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30 };
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31
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32
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33 dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,
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34 const char *pathname, FILE *fp)
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35 {
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36 dl_funcptr p;
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37 char funcname[258];
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38
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39 /*
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40 ** Dynamic loading of CFM shared libraries on the Mac. The
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41 ** code has become more convoluted than it was, because we
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42 ** want to be able to put multiple modules in a single
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43 ** file. For this reason, we have to determine the fragment
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44 ** name, and we cannot use the library entry point but we have
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45 ** to locate the correct init routine "by hand".
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46 */
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47 FSSpec libspec;
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48 CFragConnectionID connID;
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49 Ptr mainAddr;
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50 Str255 errMessage;
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51 OSErr err;
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52 #ifndef USE_GUSI1
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53 Boolean isfolder, didsomething;
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54 #endif
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55 char buf[512];
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56 Str63 fragname;
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57 Ptr symAddr;
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58 CFragSymbolClass class;
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59
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60 /* First resolve any aliases to find the real file */
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61 #ifdef USE_GUSI1
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62 err = Path2FSSpec(pathname, &libspec);
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63 #else
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64 c2pstrcpy((unsigned char *)buf, pathname);
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65 (void)FSMakeFSSpec(0, 0, (unsigned char *)buf, &libspec);
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66 err = ResolveAliasFile(&libspec, 1, &isfolder, &didsomething);
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67 #endif
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68 if ( err ) {
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69 sprintf(buf, "%.200s: %.200s", pathname, PyMac_StrError(err));
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70 PyErr_SetString(PyExc_ImportError, buf);
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71 return NULL;
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72 }
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73 /* Next, determine the fragment name,
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74 by stripping '.slb' and 'module' */
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75 memcpy(fragname+1, libspec.name+1, libspec.name[0]);
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76 fragname[0] = libspec.name[0];
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77 if( strncmp((char *)(fragname+1+fragname[0]-4),
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78 ".slb", 4) == 0 )
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79 fragname[0] -= 4;
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80 if ( strncmp((char *)(fragname+1+fragname[0]-6),
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81 "module", 6) == 0 )
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82 fragname[0] -= 6;
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83 /* Load the fragment
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84 (or return the connID if it is already loaded */
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85 err = GetDiskFragment(&libspec, 0, 0, fragname,
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86 kLoadCFrag, &connID, &mainAddr,
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87 errMessage);
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88 if ( err == cfragImportTooOldErr || err == cfragImportTooNewErr ) {
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89 /*
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90 ** Special-case code: if PythonCore is too old or too new this means
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91 ** the dynamic module was meant for a different Python.
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92 */
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93 if (errMessage[0] == 10 && strncmp((char *)errMessage+1, "PythonCore", 10) == 0 ) {
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94 sprintf(buf, "Dynamic module was built for %s version of MacPython",
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95 (err == cfragImportTooOldErr ? "a newer" : "an older"));
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96 PyErr_SetString(PyExc_ImportError, buf);
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97 return NULL;
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98 }
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99 }
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100 if ( err ) {
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101 sprintf(buf, "%.*s: %.200s",
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102 errMessage[0], errMessage+1,
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103 PyMac_StrError(err));
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104 PyErr_SetString(PyExc_ImportError, buf);
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105 return NULL;
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106 }
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107 /* Locate the address of the correct init function */
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108 sprintf(funcname, "init%.200s", shortname);
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109 err = FindSymbol(connID, Pstring(funcname), &symAddr, &class);
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110 if ( err ) {
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111 sprintf(buf, "%s: %.200s",
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112 funcname, PyMac_StrError(err));
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113 PyErr_SetString(PyExc_ImportError, buf);
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114 return NULL;
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115 }
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116 p = (dl_funcptr)symAddr;
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117
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118 return p;
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119 }