Mercurial > cpython-lru_cache-weakref

annotate Python/dynload_mac.c @ 14103:f657dc8ff25e legacy-trunk

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Thomas reminds me to bump the MAGIC number for the extended print opcode additions.
author Barry Warsaw <barry@python.org>
date Mon, 21 Aug 2000 16:35:06 +0000
parents a032101ed926
children 6f6f965c5e2d
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1 /***********************************************************
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2 Copyright (c) 2000, BeOpen.com.
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3 Copyright (c) 1995-2000, Corporation for National Research Initiatives.
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4 Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
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5 All rights reserved.
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6
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7 See the file "Misc/COPYRIGHT" for information on usage and
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8 redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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9 ******************************************************************/
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10
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11 /* Support for dynamic loading of extension modules */
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12
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13 #include "Python.h"
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14 #include "importdl.h"
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15
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16 #include <Aliases.h>
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17 #include <CodeFragments.h>
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18 #ifdef USE_GUSI1
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19 #include "TFileSpec.h" /* for Path2FSSpec() */
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20 #endif
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21 #include <Files.h>
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22 #include "macdefs.h"
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23 #include "macglue.h"
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24
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25
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26 const struct filedescr _PyImport_DynLoadFiletab[] = {
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27 {".slb", "rb", C_EXTENSION},
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28 #ifdef __CFM68K__
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29 {".CFM68K.slb", "rb", C_EXTENSION},
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30 #else
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31 {".ppc.slb", "rb", C_EXTENSION},
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32 #endif
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33 {0, 0}
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34 };
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35
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36
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37 dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,
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38 const char *pathname, FILE *fp)
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39 {
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40 dl_funcptr p;
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41 char funcname[258];
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42
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43 /*
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44 ** Dynamic loading of CFM shared libraries on the Mac. The
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45 ** code has become more convoluted than it was, because we
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46 ** want to be able to put multiple modules in a single
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47 ** file. For this reason, we have to determine the fragment
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48 ** name, and we cannot use the library entry point but we have
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49 ** to locate the correct init routine "by hand".
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50 */
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51 FSSpec libspec;
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52 CFragConnectionID connID;
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53 Ptr mainAddr;
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54 Str255 errMessage;
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55 OSErr err;
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56 #ifndef USE_GUSI1
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57 Boolean isfolder, didsomething;
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58 #endif
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59 char buf[512];
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60 Str63 fragname;
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61 Ptr symAddr;
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62 CFragSymbolClass class;
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63
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64 /* First resolve any aliases to find the real file */
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65 #ifdef USE_GUSI1
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66 err = Path2FSSpec(pathname, &libspec);
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67 #else
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68 (void)FSMakeFSSpec(0, 0, Pstring(pathname), &libspec);
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69 err = ResolveAliasFile(&libspec, 1, &isfolder, &didsomething);
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70 #endif
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71 if ( err ) {
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72 sprintf(buf, "%.255s: %.200s",
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73 pathname, PyMac_StrError(err));
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74 PyErr_SetString(PyExc_ImportError, buf);
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75 return NULL;
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76 }
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77 /* Next, determine the fragment name,
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78 by stripping '.slb' and 'module' */
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79 memcpy(fragname+1, libspec.name+1, libspec.name[0]);
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80 fragname[0] = libspec.name[0];
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81 if( strncmp((char *)(fragname+1+fragname[0]-4),
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82 ".slb", 4) == 0 )
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83 fragname[0] -= 4;
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84 if ( strncmp((char *)(fragname+1+fragname[0]-6),
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85 "module", 6) == 0 )
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86 fragname[0] -= 6;
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87 /* Load the fragment
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88 (or return the connID if it is already loaded */
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89 err = GetDiskFragment(&libspec, 0, 0, fragname,
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90 kLoadCFrag, &connID, &mainAddr,
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91 errMessage);
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92 if ( err == cfragImportTooOldErr || err == cfragImportTooNewErr ) {
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93 /*
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94 ** Special-case code: if PythonCore is too old or too new this means
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95 ** the dynamic module was meant for a different Python.
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96 */
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97 if (errMessage[0] == 10 && strncmp((char *)errMessage+1, "PythonCore", 10) == 0 ) {
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98 sprintf(buf, "Dynamic module was built for %s version of MacPython",
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99 (err == cfragImportTooOldErr ? "a newer" : "an older"));
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100 PyErr_SetString(PyExc_ImportError, buf);
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101 return NULL;
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102 }
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103 }
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104 if ( err ) {
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105 sprintf(buf, "%.*s: %.200s",
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106 errMessage[0], errMessage+1,
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107 PyMac_StrError(err));
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108 PyErr_SetString(PyExc_ImportError, buf);
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109 return NULL;
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110 }
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111 /* Locate the address of the correct init function */
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112 sprintf(funcname, "init%.200s", shortname);
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113 err = FindSymbol(connID, Pstring(funcname), &symAddr, &class);
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114 if ( err ) {
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115 sprintf(buf, "%s: %.200s",
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116 funcname, PyMac_StrError(err));
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117 PyErr_SetString(PyExc_ImportError, buf);
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118 return NULL;
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119 }
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120 p = (dl_funcptr)symAddr;
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121
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122 return p;
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123 }