2 /* Module definition and import implementation */
6 #include "Python-ast.h"
7 #undef Yield /* undefine macro conflicting with winbase.h */
26 /* for stat.st_mode */
27 typedef unsigned short mode_t
;
31 /* Magic word to reject .pyc files generated by other Python versions.
32 It should change for each incompatible change to the bytecode.
34 The value of CR and LF is incorporated so if you ever read or write
35 a .pyc file in text mode the magic number will be wrong; also, the
36 Apple MPW compiler swaps their values, botching string constants.
38 The magic numbers must be spaced apart atleast 2 values, as the
39 -U interpeter flag will cause MAGIC+1 being used. They have been
40 odd numbers for some time now.
42 There were a variety of old schemes for setting the magic number.
43 The current working scheme is to increment the previous value by
59 Python 2.3a0: 62011 (!)
64 Python 2.5a0: 62081 (ast-branch)
65 Python 2.5a0: 62091 (with)
66 Python 2.5a0: 62092 (changed WITH_CLEANUP opcode)
67 Python 2.5b3: 62101 (fix wrong code: for x, in ...)
68 Python 2.5b3: 62111 (fix wrong code: x += yield)
69 Python 2.5c1: 62121 (fix wrong lnotab with for loops and
70 storing constants that should have been removed)
71 Python 2.5c2: 62131 (fix wrong code: for x, in ... in listcomp/genexp)
72 Python 2.6a0: 62151 (peephole optimizations and STORE_MAP opcode)
73 Python 2.6a1: 62161 (WITH_CLEANUP optimization)
74 Python 2.7a0: 62171 (optimize list comprehensions/change LIST_APPEND)
75 Python 2.7a0: 62181 (optimize conditional branches:
76 introduce POP_JUMP_IF_FALSE and POP_JUMP_IF_TRUE)
77 Python 2.7a0 62191 (introduce SETUP_WITH)
78 Python 2.7a0 62201 (introduce BUILD_SET)
79 Python 2.7a0 62211 (introduce MAP_ADD and SET_ADD)
82 #define MAGIC (62211 | ((long)'\r'<<16) | ((long)'\n'<<24))
84 /* Magic word as global; note that _PyImport_Init() can change the
85 value of this global to accommodate for alterations of how the
86 compiler works which are enabled by command line switches. */
87 static long pyc_magic
= MAGIC
;
89 /* See _PyImport_FixupExtension() below */
90 static PyObject
*extensions
= NULL
;
92 /* This table is defined in config.c: */
93 extern struct _inittab _PyImport_Inittab
[];
95 struct _inittab
*PyImport_Inittab
= _PyImport_Inittab
;
97 /* these tables define the module suffixes that Python recognizes */
98 struct filedescr
* _PyImport_Filetab
= NULL
;
101 static const struct filedescr _PyImport_StandardFiletab
[] = {
102 {"/py", "U", PY_SOURCE
},
103 {"/pyc", "rb", PY_COMPILED
},
107 static const struct filedescr _PyImport_StandardFiletab
[] = {
108 {".py", "U", PY_SOURCE
},
110 {".pyw", "U", PY_SOURCE
},
112 {".pyc", "rb", PY_COMPILED
},
118 static int isdir(char *path
) {
120 /* see issue1293 and issue3677:
121 * stat() on Windows doesn't recognise paths like
122 * "e:\\shared\\" and "\\\\whiterab-c2znlh\\shared" as dirs.
123 * Also reference issue6727:
124 * stat() on Windows is broken and doesn't resolve symlinks properly.
126 rv
= GetFileAttributesA(path
);
127 return rv
!= INVALID_FILE_ATTRIBUTES
&& rv
& FILE_ATTRIBUTE_DIRECTORY
;
131 static int isdir(char *path
) {
133 return stat(path
, &statbuf
) == 0 && S_ISDIR(statbuf
.st_mode
);
137 /* with RISCOS, isdir is in unixstuff */
139 int isdir(char *path
) {
143 #endif /* HAVE_STAT */
144 #endif /* MS_WINDOWS */
146 /* Initialize things */
151 const struct filedescr
*scan
;
152 struct filedescr
*filetab
;
156 /* prepare _PyImport_Filetab: copy entries from
157 _PyImport_DynLoadFiletab and _PyImport_StandardFiletab.
159 #ifdef HAVE_DYNAMIC_LOADING
160 for (scan
= _PyImport_DynLoadFiletab
; scan
->suffix
!= NULL
; ++scan
)
163 for (scan
= _PyImport_StandardFiletab
; scan
->suffix
!= NULL
; ++scan
)
165 filetab
= PyMem_NEW(struct filedescr
, countD
+ countS
+ 1);
167 Py_FatalError("Can't initialize import file table.");
168 #ifdef HAVE_DYNAMIC_LOADING
169 memcpy(filetab
, _PyImport_DynLoadFiletab
,
170 countD
* sizeof(struct filedescr
));
172 memcpy(filetab
+ countD
, _PyImport_StandardFiletab
,
173 countS
* sizeof(struct filedescr
));
174 filetab
[countD
+ countS
].suffix
= NULL
;
176 _PyImport_Filetab
= filetab
;
178 if (Py_OptimizeFlag
) {
179 /* Replace ".pyc" with ".pyo" in _PyImport_Filetab */
180 for (; filetab
->suffix
!= NULL
; filetab
++) {
182 if (strcmp(filetab
->suffix
, ".pyc") == 0)
183 filetab
->suffix
= ".pyo";
185 if (strcmp(filetab
->suffix
, "/pyc") == 0)
186 filetab
->suffix
= "/pyo";
191 if (Py_UnicodeFlag
) {
192 /* Fix the pyc_magic so that byte compiled code created
193 using the all-Unicode method doesn't interfere with
194 code created in normal operation mode. */
195 pyc_magic
= MAGIC
+ 1;
200 _PyImportHooks_Init(void)
202 PyObject
*v
, *path_hooks
= NULL
, *zimpimport
;
205 /* adding sys.path_hooks and sys.path_importer_cache, setting up
207 if (PyType_Ready(&PyNullImporter_Type
) < 0)
211 PySys_WriteStderr("# installing zipimport hook\n");
216 err
= PySys_SetObject("meta_path", v
);
223 err
= PySys_SetObject("path_importer_cache", v
);
227 path_hooks
= PyList_New(0);
228 if (path_hooks
== NULL
)
230 err
= PySys_SetObject("path_hooks", path_hooks
);
234 Py_FatalError("initializing sys.meta_path, sys.path_hooks, "
235 "path_importer_cache, or NullImporter failed"
239 zimpimport
= PyImport_ImportModule("zipimport");
240 if (zimpimport
== NULL
) {
241 PyErr_Clear(); /* No zip import module -- okay */
243 PySys_WriteStderr("# can't import zipimport\n");
246 PyObject
*zipimporter
= PyObject_GetAttrString(zimpimport
,
248 Py_DECREF(zimpimport
);
249 if (zipimporter
== NULL
) {
250 PyErr_Clear(); /* No zipimporter object -- okay */
253 "# can't import zipimport.zipimporter\n");
256 /* sys.path_hooks.append(zipimporter) */
257 err
= PyList_Append(path_hooks
, zipimporter
);
258 Py_DECREF(zipimporter
);
263 "# installed zipimport hook\n");
266 Py_DECREF(path_hooks
);
272 Py_XDECREF(extensions
);
274 PyMem_DEL(_PyImport_Filetab
);
275 _PyImport_Filetab
= NULL
;
279 /* Locking primitives to prevent parallel imports of the same module
280 in different threads to return with a partially loaded module.
281 These calls are serialized by the global interpreter lock. */
285 #include "pythread.h"
287 static PyThread_type_lock import_lock
= 0;
288 static long import_lock_thread
= -1;
289 static int import_lock_level
= 0;
292 _PyImport_AcquireLock(void)
294 long me
= PyThread_get_thread_ident();
296 return; /* Too bad */
297 if (import_lock
== NULL
) {
298 import_lock
= PyThread_allocate_lock();
299 if (import_lock
== NULL
)
300 return; /* Nothing much we can do. */
302 if (import_lock_thread
== me
) {
306 if (import_lock_thread
!= -1 || !PyThread_acquire_lock(import_lock
, 0))
308 PyThreadState
*tstate
= PyEval_SaveThread();
309 PyThread_acquire_lock(import_lock
, 1);
310 PyEval_RestoreThread(tstate
);
312 import_lock_thread
= me
;
313 import_lock_level
= 1;
317 _PyImport_ReleaseLock(void)
319 long me
= PyThread_get_thread_ident();
320 if (me
== -1 || import_lock
== NULL
)
321 return 0; /* Too bad */
322 if (import_lock_thread
!= me
)
325 if (import_lock_level
== 0) {
326 import_lock_thread
= -1;
327 PyThread_release_lock(import_lock
);
332 /* This function is called from PyOS_AfterFork to ensure that newly
333 created child processes do not share locks with the parent.
334 We now acquire the import lock around fork() calls but on some platforms
335 (Solaris 9 and earlier? see isue7242) that still left us with problems. */
338 _PyImport_ReInitLock(void)
340 if (import_lock
!= NULL
) {
341 import_lock
= PyThread_allocate_lock();
342 if (import_lock
== NULL
) {
343 Py_FatalError("PyImport_ReInitLock failed to create a new lock");
346 import_lock_thread
= -1;
347 import_lock_level
= 0;
353 imp_lock_held(PyObject
*self
, PyObject
*noargs
)
356 return PyBool_FromLong(import_lock_thread
!= -1);
358 return PyBool_FromLong(0);
363 imp_acquire_lock(PyObject
*self
, PyObject
*noargs
)
366 _PyImport_AcquireLock();
373 imp_release_lock(PyObject
*self
, PyObject
*noargs
)
376 if (_PyImport_ReleaseLock() < 0) {
377 PyErr_SetString(PyExc_RuntimeError
,
378 "not holding the import lock");
387 imp_modules_reloading_clear(void)
389 PyInterpreterState
*interp
= PyThreadState_Get()->interp
;
390 if (interp
->modules_reloading
!= NULL
)
391 PyDict_Clear(interp
->modules_reloading
);
397 PyImport_GetModuleDict(void)
399 PyInterpreterState
*interp
= PyThreadState_GET()->interp
;
400 if (interp
->modules
== NULL
)
401 Py_FatalError("PyImport_GetModuleDict: no module dictionary!");
402 return interp
->modules
;
406 /* List of names to clear in sys */
407 static char* sys_deletes
[] = {
408 "path", "argv", "ps1", "ps2", "exitfunc",
409 "exc_type", "exc_value", "exc_traceback",
410 "last_type", "last_value", "last_traceback",
411 "path_hooks", "path_importer_cache", "meta_path",
413 "flags", "float_info",
417 static char* sys_files
[] = {
418 "stdin", "__stdin__",
419 "stdout", "__stdout__",
420 "stderr", "__stderr__",
425 /* Un-initialize things, as good as we can */
428 PyImport_Cleanup(void)
430 Py_ssize_t pos
, ndone
;
432 PyObject
*key
, *value
, *dict
;
433 PyInterpreterState
*interp
= PyThreadState_GET()->interp
;
434 PyObject
*modules
= interp
->modules
;
437 return; /* Already done */
439 /* Delete some special variables first. These are common
440 places where user values hide and people complain when their
441 destructors fail. Since the modules containing them are
442 deleted *last* of all, they would come too late in the normal
443 destruction order. Sigh. */
445 value
= PyDict_GetItemString(modules
, "__builtin__");
446 if (value
!= NULL
&& PyModule_Check(value
)) {
447 dict
= PyModule_GetDict(value
);
449 PySys_WriteStderr("# clear __builtin__._\n");
450 PyDict_SetItemString(dict
, "_", Py_None
);
452 value
= PyDict_GetItemString(modules
, "sys");
453 if (value
!= NULL
&& PyModule_Check(value
)) {
456 dict
= PyModule_GetDict(value
);
457 for (p
= sys_deletes
; *p
!= NULL
; p
++) {
459 PySys_WriteStderr("# clear sys.%s\n", *p
);
460 PyDict_SetItemString(dict
, *p
, Py_None
);
462 for (p
= sys_files
; *p
!= NULL
; p
+=2) {
464 PySys_WriteStderr("# restore sys.%s\n", *p
);
465 v
= PyDict_GetItemString(dict
, *(p
+1));
468 PyDict_SetItemString(dict
, *p
, v
);
472 /* First, delete __main__ */
473 value
= PyDict_GetItemString(modules
, "__main__");
474 if (value
!= NULL
&& PyModule_Check(value
)) {
476 PySys_WriteStderr("# cleanup __main__\n");
477 _PyModule_Clear(value
);
478 PyDict_SetItemString(modules
, "__main__", Py_None
);
481 /* The special treatment of __builtin__ here is because even
482 when it's not referenced as a module, its dictionary is
483 referenced by almost every module's __builtins__. Since
484 deleting a module clears its dictionary (even if there are
485 references left to it), we need to delete the __builtin__
486 module last. Likewise, we don't delete sys until the very
487 end because it is implicitly referenced (e.g. by print).
489 Also note that we 'delete' modules by replacing their entry
490 in the modules dict with None, rather than really deleting
491 them; this avoids a rehash of the modules dictionary and
492 also marks them as "non existent" so they won't be
495 /* Next, repeatedly delete modules with a reference count of
496 one (skipping __builtin__ and sys) and delete them */
500 while (PyDict_Next(modules
, &pos
, &key
, &value
)) {
501 if (value
->ob_refcnt
!= 1)
503 if (PyString_Check(key
) && PyModule_Check(value
)) {
504 name
= PyString_AS_STRING(key
);
505 if (strcmp(name
, "__builtin__") == 0)
507 if (strcmp(name
, "sys") == 0)
511 "# cleanup[1] %s\n", name
);
512 _PyModule_Clear(value
);
513 PyDict_SetItem(modules
, key
, Py_None
);
519 /* Next, delete all modules (still skipping __builtin__ and sys) */
521 while (PyDict_Next(modules
, &pos
, &key
, &value
)) {
522 if (PyString_Check(key
) && PyModule_Check(value
)) {
523 name
= PyString_AS_STRING(key
);
524 if (strcmp(name
, "__builtin__") == 0)
526 if (strcmp(name
, "sys") == 0)
529 PySys_WriteStderr("# cleanup[2] %s\n", name
);
530 _PyModule_Clear(value
);
531 PyDict_SetItem(modules
, key
, Py_None
);
535 /* Next, delete sys and __builtin__ (in that order) */
536 value
= PyDict_GetItemString(modules
, "sys");
537 if (value
!= NULL
&& PyModule_Check(value
)) {
539 PySys_WriteStderr("# cleanup sys\n");
540 _PyModule_Clear(value
);
541 PyDict_SetItemString(modules
, "sys", Py_None
);
543 value
= PyDict_GetItemString(modules
, "__builtin__");
544 if (value
!= NULL
&& PyModule_Check(value
)) {
546 PySys_WriteStderr("# cleanup __builtin__\n");
547 _PyModule_Clear(value
);
548 PyDict_SetItemString(modules
, "__builtin__", Py_None
);
551 /* Finally, clear and delete the modules directory */
552 PyDict_Clear(modules
);
553 interp
->modules
= NULL
;
555 Py_CLEAR(interp
->modules_reloading
);
559 /* Helper for pythonrun.c -- return magic number */
562 PyImport_GetMagicNumber(void)
568 /* Magic for extension modules (built-in as well as dynamically
569 loaded). To prevent initializing an extension module more than
570 once, we keep a static dictionary 'extensions' keyed by module name
571 (for built-in modules) or by filename (for dynamically loaded
572 modules), containing these modules. A copy of the module's
573 dictionary is stored by calling _PyImport_FixupExtension()
574 immediately after the module initialization function succeeds. A
575 copy can be retrieved from there by calling
576 _PyImport_FindExtension(). */
579 _PyImport_FixupExtension(char *name
, char *filename
)
581 PyObject
*modules
, *mod
, *dict
, *copy
;
582 if (extensions
== NULL
) {
583 extensions
= PyDict_New();
584 if (extensions
== NULL
)
587 modules
= PyImport_GetModuleDict();
588 mod
= PyDict_GetItemString(modules
, name
);
589 if (mod
== NULL
|| !PyModule_Check(mod
)) {
590 PyErr_Format(PyExc_SystemError
,
591 "_PyImport_FixupExtension: module %.200s not loaded", name
);
594 dict
= PyModule_GetDict(mod
);
597 copy
= PyDict_Copy(dict
);
600 PyDict_SetItemString(extensions
, filename
, copy
);
606 _PyImport_FindExtension(char *name
, char *filename
)
608 PyObject
*dict
, *mod
, *mdict
;
609 if (extensions
== NULL
)
611 dict
= PyDict_GetItemString(extensions
, filename
);
614 mod
= PyImport_AddModule(name
);
617 mdict
= PyModule_GetDict(mod
);
620 if (PyDict_Update(mdict
, dict
))
623 PySys_WriteStderr("import %s # previously loaded (%s)\n",
629 /* Get the module object corresponding to a module name.
630 First check the modules dictionary if there's one there,
631 if not, create a new one and insert it in the modules dictionary.
632 Because the former action is most common, THIS DOES NOT RETURN A
636 PyImport_AddModule(const char *name
)
638 PyObject
*modules
= PyImport_GetModuleDict();
641 if ((m
= PyDict_GetItemString(modules
, name
)) != NULL
&&
644 m
= PyModule_New(name
);
647 if (PyDict_SetItemString(modules
, name
, m
) != 0) {
651 Py_DECREF(m
); /* Yes, it still exists, in modules! */
656 /* Remove name from sys.modules, if it's there. */
658 remove_module(const char *name
)
660 PyObject
*modules
= PyImport_GetModuleDict();
661 if (PyDict_GetItemString(modules
, name
) == NULL
)
663 if (PyDict_DelItemString(modules
, name
) < 0)
664 Py_FatalError("import: deleting existing key in"
665 "sys.modules failed");
668 /* Execute a code object in a module and return the module object
669 * WITH INCREMENTED REFERENCE COUNT. If an error occurs, name is
670 * removed from sys.modules, to avoid leaving damaged module objects
671 * in sys.modules. The caller may wish to restore the original
672 * module object (if any) in this case; PyImport_ReloadModule is an
676 PyImport_ExecCodeModule(char *name
, PyObject
*co
)
678 return PyImport_ExecCodeModuleEx(name
, co
, (char *)NULL
);
682 PyImport_ExecCodeModuleEx(char *name
, PyObject
*co
, char *pathname
)
684 PyObject
*modules
= PyImport_GetModuleDict();
687 m
= PyImport_AddModule(name
);
690 /* If the module is being reloaded, we get the old module back
691 and re-use its dict to exec the new code. */
692 d
= PyModule_GetDict(m
);
693 if (PyDict_GetItemString(d
, "__builtins__") == NULL
) {
694 if (PyDict_SetItemString(d
, "__builtins__",
695 PyEval_GetBuiltins()) != 0)
698 /* Remember the filename as the __file__ attribute */
700 if (pathname
!= NULL
) {
701 v
= PyString_FromString(pathname
);
706 v
= ((PyCodeObject
*)co
)->co_filename
;
709 if (PyDict_SetItemString(d
, "__file__", v
) != 0)
710 PyErr_Clear(); /* Not important enough to report */
713 v
= PyEval_EvalCode((PyCodeObject
*)co
, d
, d
);
718 if ((m
= PyDict_GetItemString(modules
, name
)) == NULL
) {
719 PyErr_Format(PyExc_ImportError
,
720 "Loaded module %.200s not found in sys.modules",
735 /* Given a pathname for a Python source file, fill a buffer with the
736 pathname for the corresponding compiled file. Return the pathname
737 for the compiled file, or NULL if there's no space in the buffer.
738 Doesn't set an exception. */
741 make_compiled_pathname(char *pathname
, char *buf
, size_t buflen
)
743 size_t len
= strlen(pathname
);
748 /* Treat .pyw as if it were .py. The case of ".pyw" must match
749 that used in _PyImport_StandardFiletab. */
750 if (len
>= 4 && strcmp(&pathname
[len
-4], ".pyw") == 0)
751 --len
; /* pretend 'w' isn't there */
753 memcpy(buf
, pathname
, len
);
754 buf
[len
] = Py_OptimizeFlag
? 'o' : 'c';
761 /* Given a pathname for a Python source file, its time of last
762 modification, and a pathname for a compiled file, check whether the
763 compiled file represents the same version of the source. If so,
764 return a FILE pointer for the compiled file, positioned just after
765 the header; if not, return NULL.
766 Doesn't set an exception. */
769 check_compiled_module(char *pathname
, time_t mtime
, char *cpathname
)
775 fp
= fopen(cpathname
, "rb");
778 magic
= PyMarshal_ReadLongFromFile(fp
);
779 if (magic
!= pyc_magic
) {
781 PySys_WriteStderr("# %s has bad magic\n", cpathname
);
785 pyc_mtime
= PyMarshal_ReadLongFromFile(fp
);
786 if (pyc_mtime
!= mtime
) {
788 PySys_WriteStderr("# %s has bad mtime\n", cpathname
);
793 PySys_WriteStderr("# %s matches %s\n", cpathname
, pathname
);
798 /* Read a code object from a file and check it for validity */
800 static PyCodeObject
*
801 read_compiled_module(char *cpathname
, FILE *fp
)
805 co
= PyMarshal_ReadLastObjectFromFile(fp
);
808 if (!PyCode_Check(co
)) {
809 PyErr_Format(PyExc_ImportError
,
810 "Non-code object in %.200s", cpathname
);
814 return (PyCodeObject
*)co
;
818 /* Load a module from a compiled file, execute it, and return its
819 module object WITH INCREMENTED REFERENCE COUNT */
822 load_compiled_module(char *name
, char *cpathname
, FILE *fp
)
828 magic
= PyMarshal_ReadLongFromFile(fp
);
829 if (magic
!= pyc_magic
) {
830 PyErr_Format(PyExc_ImportError
,
831 "Bad magic number in %.200s", cpathname
);
834 (void) PyMarshal_ReadLongFromFile(fp
);
835 co
= read_compiled_module(cpathname
, fp
);
839 PySys_WriteStderr("import %s # precompiled from %s\n",
841 m
= PyImport_ExecCodeModuleEx(name
, (PyObject
*)co
, cpathname
);
847 /* Parse a source file and return the corresponding code object */
849 static PyCodeObject
*
850 parse_source_module(const char *pathname
, FILE *fp
)
852 PyCodeObject
*co
= NULL
;
854 PyCompilerFlags flags
;
855 PyArena
*arena
= PyArena_New();
861 mod
= PyParser_ASTFromFile(fp
, pathname
, Py_file_input
, 0, 0, &flags
,
864 co
= PyAST_Compile(mod
, pathname
, NULL
, arena
);
871 /* Helper to open a bytecode file for writing in exclusive mode */
874 open_exclusive(char *filename
, mode_t mode
)
876 #if defined(O_EXCL)&&defined(O_CREAT)&&defined(O_WRONLY)&&defined(O_TRUNC)
877 /* Use O_EXCL to avoid a race condition when another process tries to
878 write the same file. When that happens, our open() call fails,
879 which is just fine (since it's only a cache).
880 XXX If the file exists and is writable but the directory is not
881 writable, the file will never be written. Oh well.
884 (void) unlink(filename
);
885 fd
= open(filename
, O_EXCL
|O_CREAT
|O_WRONLY
|O_TRUNC
887 |O_BINARY
/* necessary for Windows */
890 , mode
, "ctxt=bin", "shr=nil"
897 return fdopen(fd
, "wb");
899 /* Best we can do -- on Windows this can't happen anyway */
900 return fopen(filename
, "wb");
905 /* Write a compiled module to a file, placing the time of last
906 modification of its source into the header.
907 Errors are ignored, if a write error occurs an attempt is made to
911 write_compiled_module(PyCodeObject
*co
, char *cpathname
, struct stat
*srcstat
, time_t mtime
)
914 #ifdef MS_WINDOWS /* since Windows uses different permissions */
915 mode_t mode
= srcstat
->st_mode
& ~S_IEXEC
;
916 /* Issue #6074: We ensure user write access, so we can delete it later
917 * when the source file changes. (On POSIX, this only requires write
918 * access to the directory, on Windows, we need write access to the file
923 mode_t mode
= srcstat
->st_mode
& ~S_IXUSR
& ~S_IXGRP
& ~S_IXOTH
;
926 fp
= open_exclusive(cpathname
, mode
);
930 "# can't create %s\n", cpathname
);
933 PyMarshal_WriteLongToFile(pyc_magic
, fp
, Py_MARSHAL_VERSION
);
934 /* First write a 0 for mtime */
935 PyMarshal_WriteLongToFile(0L, fp
, Py_MARSHAL_VERSION
);
936 PyMarshal_WriteObjectToFile((PyObject
*)co
, fp
, Py_MARSHAL_VERSION
);
937 if (fflush(fp
) != 0 || ferror(fp
)) {
939 PySys_WriteStderr("# can't write %s\n", cpathname
);
940 /* Don't keep partial file */
942 (void) unlink(cpathname
);
945 /* Now write the true mtime (as a 32-bit field) */
947 assert(mtime
<= 0xFFFFFFFF);
948 PyMarshal_WriteLongToFile((long)mtime
, fp
, Py_MARSHAL_VERSION
);
952 PySys_WriteStderr("# wrote %s\n", cpathname
);
956 update_code_filenames(PyCodeObject
*co
, PyObject
*oldname
, PyObject
*newname
)
958 PyObject
*constants
, *tmp
;
961 if (!_PyString_Eq(co
->co_filename
, oldname
))
964 tmp
= co
->co_filename
;
965 co
->co_filename
= newname
;
966 Py_INCREF(co
->co_filename
);
969 constants
= co
->co_consts
;
970 n
= PyTuple_GET_SIZE(constants
);
971 for (i
= 0; i
< n
; i
++) {
972 tmp
= PyTuple_GET_ITEM(constants
, i
);
973 if (PyCode_Check(tmp
))
974 update_code_filenames((PyCodeObject
*)tmp
,
980 update_compiled_module(PyCodeObject
*co
, char *pathname
)
982 PyObject
*oldname
, *newname
;
984 if (strcmp(PyString_AsString(co
->co_filename
), pathname
) == 0)
987 newname
= PyString_FromString(pathname
);
991 oldname
= co
->co_filename
;
993 update_code_filenames(co
, oldname
, newname
);
1001 /* Seconds between 1.1.1601 and 1.1.1970 */
1002 static __int64 secs_between_epochs
= 11644473600;
1004 /* Get mtime from file pointer. */
1007 win32_mtime(FILE *fp
, char *pathname
)
1011 BY_HANDLE_FILE_INFORMATION file_information
;
1013 fh
= (HANDLE
)_get_osfhandle(fileno(fp
));
1014 if (fh
== INVALID_HANDLE_VALUE
||
1015 !GetFileInformationByHandle(fh
, &file_information
)) {
1016 PyErr_Format(PyExc_RuntimeError
,
1017 "unable to get file status from '%s'",
1021 /* filetime represents the number of 100ns intervals since
1022 1.1.1601 (UTC). Convert to seconds since 1.1.1970 (UTC). */
1023 filetime
= (__int64
)file_information
.ftLastWriteTime
.dwHighDateTime
<< 32 |
1024 file_information
.ftLastWriteTime
.dwLowDateTime
;
1025 return filetime
/ 10000000 - secs_between_epochs
;
1028 #endif /* #ifdef MS_WINDOWS */
1031 /* Load a source module from a given file and return its module
1032 object WITH INCREMENTED REFERENCE COUNT. If there's a matching
1033 byte-compiled file, use that instead. */
1036 load_source_module(char *name
, char *pathname
, FILE *fp
)
1042 PyCodeObject
*co
= NULL
;
1046 if (fstat(fileno(fp
), &st
) != 0) {
1047 PyErr_Format(PyExc_RuntimeError
,
1048 "unable to get file status from '%s'",
1054 mtime
= win32_mtime(fp
, pathname
);
1055 if (mtime
== (time_t)-1 && PyErr_Occurred())
1058 mtime
= st
.st_mtime
;
1060 if (sizeof mtime
> 4) {
1061 /* Python's .pyc timestamp handling presumes that the timestamp fits
1062 in 4 bytes. Since the code only does an equality comparison,
1063 ordering is not important and we can safely ignore the higher bits
1064 (collisions are extremely unlikely).
1066 mtime
&= 0xFFFFFFFF;
1068 buf
= PyMem_MALLOC(MAXPATHLEN
+1);
1070 return PyErr_NoMemory();
1072 cpathname
= make_compiled_pathname(pathname
, buf
,
1073 (size_t)MAXPATHLEN
+ 1);
1074 if (cpathname
!= NULL
&&
1075 (fpc
= check_compiled_module(pathname
, mtime
, cpathname
))) {
1076 co
= read_compiled_module(cpathname
, fpc
);
1080 if (update_compiled_module(co
, pathname
) < 0)
1083 PySys_WriteStderr("import %s # precompiled from %s\n",
1085 pathname
= cpathname
;
1088 co
= parse_source_module(pathname
, fp
);
1092 PySys_WriteStderr("import %s # from %s\n",
1095 PyObject
*ro
= PySys_GetObject("dont_write_bytecode");
1096 int b
= (ro
== NULL
) ? 0 : PyObject_IsTrue(ro
);
1100 write_compiled_module(co
, cpathname
, &st
, mtime
);
1103 m
= PyImport_ExecCodeModuleEx(name
, (PyObject
*)co
, pathname
);
1117 static PyObject
*load_module(char *, FILE *, char *, int, PyObject
*);
1118 static struct filedescr
*find_module(char *, char *, PyObject
*,
1119 char *, size_t, FILE **, PyObject
**);
1120 static struct _frozen
*find_frozen(char *name
);
1122 /* Load a package and return its module object WITH INCREMENTED
1126 load_package(char *name
, char *pathname
)
1129 PyObject
*file
= NULL
;
1130 PyObject
*path
= NULL
;
1134 struct filedescr
*fdp
;
1136 m
= PyImport_AddModule(name
);
1140 PySys_WriteStderr("import %s # directory %s\n",
1142 d
= PyModule_GetDict(m
);
1143 file
= PyString_FromString(pathname
);
1146 path
= Py_BuildValue("[O]", file
);
1149 err
= PyDict_SetItemString(d
, "__file__", file
);
1151 err
= PyDict_SetItemString(d
, "__path__", path
);
1154 buf
= PyMem_MALLOC(MAXPATHLEN
+1);
1160 fdp
= find_module(name
, "__init__", path
, buf
, MAXPATHLEN
+1, &fp
, NULL
);
1162 if (PyErr_ExceptionMatches(PyExc_ImportError
)) {
1170 m
= load_module(name
, fp
, buf
, fdp
->type
, NULL
);
1186 /* Helper to test for built-in module */
1189 is_builtin(char *name
)
1192 for (i
= 0; PyImport_Inittab
[i
].name
!= NULL
; i
++) {
1193 if (strcmp(name
, PyImport_Inittab
[i
].name
) == 0) {
1194 if (PyImport_Inittab
[i
].initfunc
== NULL
)
1204 /* Return an importer object for a sys.path/pkg.__path__ item 'p',
1205 possibly by fetching it from the path_importer_cache dict. If it
1206 wasn't yet cached, traverse path_hooks until a hook is found
1207 that can handle the path item. Return None if no hook could;
1208 this tells our caller it should fall back to the builtin
1209 import mechanism. Cache the result in path_importer_cache.
1210 Returns a borrowed reference. */
1213 get_path_importer(PyObject
*path_importer_cache
, PyObject
*path_hooks
,
1217 Py_ssize_t j
, nhooks
;
1219 /* These conditions are the caller's responsibility: */
1220 assert(PyList_Check(path_hooks
));
1221 assert(PyDict_Check(path_importer_cache
));
1223 nhooks
= PyList_Size(path_hooks
);
1225 return NULL
; /* Shouldn't happen */
1227 importer
= PyDict_GetItem(path_importer_cache
, p
);
1228 if (importer
!= NULL
)
1231 /* set path_importer_cache[p] to None to avoid recursion */
1232 if (PyDict_SetItem(path_importer_cache
, p
, Py_None
) != 0)
1235 for (j
= 0; j
< nhooks
; j
++) {
1236 PyObject
*hook
= PyList_GetItem(path_hooks
, j
);
1239 importer
= PyObject_CallFunctionObjArgs(hook
, p
, NULL
);
1240 if (importer
!= NULL
)
1243 if (!PyErr_ExceptionMatches(PyExc_ImportError
)) {
1248 if (importer
== NULL
) {
1249 importer
= PyObject_CallFunctionObjArgs(
1250 (PyObject
*)&PyNullImporter_Type
, p
, NULL
1252 if (importer
== NULL
) {
1253 if (PyErr_ExceptionMatches(PyExc_ImportError
)) {
1259 if (importer
!= NULL
) {
1260 int err
= PyDict_SetItem(path_importer_cache
, p
, importer
);
1261 Py_DECREF(importer
);
1268 PyAPI_FUNC(PyObject
*)
1269 PyImport_GetImporter(PyObject
*path
) {
1270 PyObject
*importer
=NULL
, *path_importer_cache
=NULL
, *path_hooks
=NULL
;
1272 if ((path_importer_cache
= PySys_GetObject("path_importer_cache"))) {
1273 if ((path_hooks
= PySys_GetObject("path_hooks"))) {
1274 importer
= get_path_importer(path_importer_cache
,
1278 Py_XINCREF(importer
); /* get_path_importer returns a borrowed reference */
1282 /* Search the path (default sys.path) for a module. Return the
1283 corresponding filedescr struct, and (via return arguments) the
1284 pathname and an open file. Return NULL if the module is not found. */
1287 extern FILE *PyWin_FindRegisteredModule(const char *, struct filedescr
**,
1288 char *, Py_ssize_t
);
1291 static int case_ok(char *, Py_ssize_t
, Py_ssize_t
, char *);
1292 static int find_init_module(char *); /* Forward */
1293 static struct filedescr importhookdescr
= {"", "", IMP_HOOK
};
1295 static struct filedescr
*
1296 find_module(char *fullname
, char *subname
, PyObject
*path
, char *buf
,
1297 size_t buflen
, FILE **p_fp
, PyObject
**p_loader
)
1299 Py_ssize_t i
, npath
;
1300 size_t len
, namelen
;
1301 struct filedescr
*fdp
= NULL
;
1304 PyObject
*path_hooks
, *path_importer_cache
;
1305 static struct filedescr fd_frozen
= {"", "", PY_FROZEN
};
1306 static struct filedescr fd_builtin
= {"", "", C_BUILTIN
};
1307 static struct filedescr fd_package
= {"", "", PKG_DIRECTORY
};
1309 #if defined(PYOS_OS2)
1311 size_t saved_namelen
;
1312 char *saved_buf
= NULL
;
1314 if (p_loader
!= NULL
)
1317 if (strlen(subname
) > MAXPATHLEN
) {
1318 PyErr_SetString(PyExc_OverflowError
,
1319 "module name is too long");
1322 name
= PyMem_MALLOC(MAXPATHLEN
+1);
1327 strcpy(name
, subname
);
1329 /* sys.meta_path import hook */
1330 if (p_loader
!= NULL
) {
1331 PyObject
*meta_path
;
1333 meta_path
= PySys_GetObject("meta_path");
1334 if (meta_path
== NULL
|| !PyList_Check(meta_path
)) {
1335 PyErr_SetString(PyExc_RuntimeError
,
1336 "sys.meta_path must be a list of "
1340 Py_INCREF(meta_path
); /* zap guard */
1341 npath
= PyList_Size(meta_path
);
1342 for (i
= 0; i
< npath
; i
++) {
1344 PyObject
*hook
= PyList_GetItem(meta_path
, i
);
1345 loader
= PyObject_CallMethod(hook
, "find_module",
1349 if (loader
== NULL
) {
1350 Py_DECREF(meta_path
);
1351 goto error_exit
; /* true error */
1353 if (loader
!= Py_None
) {
1354 /* a loader was found */
1356 Py_DECREF(meta_path
);
1358 return &importhookdescr
;
1362 Py_DECREF(meta_path
);
1365 if (path
!= NULL
&& PyString_Check(path
)) {
1366 /* The only type of submodule allowed inside a "frozen"
1367 package are other frozen modules or packages. */
1368 if (PyString_Size(path
) + 1 + strlen(name
) >= (size_t)buflen
) {
1369 PyErr_SetString(PyExc_ImportError
,
1370 "full frozen module name too long");
1373 strcpy(buf
, PyString_AsString(path
));
1377 if (find_frozen(name
) != NULL
) {
1382 PyErr_Format(PyExc_ImportError
,
1383 "No frozen submodule named %.200s", name
);
1387 if (is_builtin(name
)) {
1392 if ((find_frozen(name
)) != NULL
) {
1399 fp
= PyWin_FindRegisteredModule(name
, &fdp
, buf
, buflen
);
1406 path
= PySys_GetObject("path");
1408 if (path
== NULL
|| !PyList_Check(path
)) {
1409 PyErr_SetString(PyExc_RuntimeError
,
1410 "sys.path must be a list of directory names");
1414 path_hooks
= PySys_GetObject("path_hooks");
1415 if (path_hooks
== NULL
|| !PyList_Check(path_hooks
)) {
1416 PyErr_SetString(PyExc_RuntimeError
,
1417 "sys.path_hooks must be a list of "
1421 path_importer_cache
= PySys_GetObject("path_importer_cache");
1422 if (path_importer_cache
== NULL
||
1423 !PyDict_Check(path_importer_cache
)) {
1424 PyErr_SetString(PyExc_RuntimeError
,
1425 "sys.path_importer_cache must be a dict");
1429 npath
= PyList_Size(path
);
1430 namelen
= strlen(name
);
1431 for (i
= 0; i
< npath
; i
++) {
1432 PyObject
*copy
= NULL
;
1433 PyObject
*v
= PyList_GetItem(path
, i
);
1436 #ifdef Py_USING_UNICODE
1437 if (PyUnicode_Check(v
)) {
1438 copy
= PyUnicode_Encode(PyUnicode_AS_UNICODE(v
),
1439 PyUnicode_GET_SIZE(v
), Py_FileSystemDefaultEncoding
, NULL
);
1446 if (!PyString_Check(v
))
1448 len
= PyString_GET_SIZE(v
);
1449 if (len
+ 2 + namelen
+ MAXSUFFIXSIZE
>= buflen
) {
1451 continue; /* Too long */
1453 strcpy(buf
, PyString_AS_STRING(v
));
1454 if (strlen(buf
) != len
) {
1456 continue; /* v contains '\0' */
1459 /* sys.path_hooks import hook */
1460 if (p_loader
!= NULL
) {
1463 importer
= get_path_importer(path_importer_cache
,
1465 if (importer
== NULL
) {
1469 /* Note: importer is a borrowed reference */
1470 if (importer
!= Py_None
) {
1472 loader
= PyObject_CallMethod(importer
,
1477 goto error_exit
; /* error */
1478 if (loader
!= Py_None
) {
1479 /* a loader was found */
1482 return &importhookdescr
;
1488 /* no hook was found, use builtin import */
1490 if (len
> 0 && buf
[len
-1] != SEP
1492 && buf
[len
-1] != ALTSEP
1496 strcpy(buf
+len
, name
);
1499 /* Check for package import (buf holds a directory name,
1500 and there's an __init__ module in that directory */
1501 if (isdir(buf
) && /* it's an existing directory */
1502 case_ok(buf
, len
, namelen
, name
)) { /* case matches */
1503 if (find_init_module(buf
)) { /* and has __init__.py */
1509 char warnstr
[MAXPATHLEN
+80];
1510 sprintf(warnstr
, "Not importing directory "
1511 "'%.*s': missing __init__.py",
1513 if (PyErr_Warn(PyExc_ImportWarning
,
1520 #if defined(PYOS_OS2)
1521 /* take a snapshot of the module spec for restoration
1522 * after the 8 character DLL hackery
1524 saved_buf
= strdup(buf
);
1526 saved_namelen
= namelen
;
1527 #endif /* PYOS_OS2 */
1528 for (fdp
= _PyImport_Filetab
; fdp
->suffix
!= NULL
; fdp
++) {
1529 #if defined(PYOS_OS2) && defined(HAVE_DYNAMIC_LOADING)
1530 /* OS/2 limits DLLs to 8 character names (w/o
1532 * so if the name is longer than that and its a
1533 * dynamically loaded module we're going to try,
1534 * truncate the name before trying
1536 if (strlen(subname
) > 8) {
1537 /* is this an attempt to load a C extension? */
1538 const struct filedescr
*scan
;
1539 scan
= _PyImport_DynLoadFiletab
;
1540 while (scan
->suffix
!= NULL
) {
1541 if (!strcmp(scan
->suffix
, fdp
->suffix
))
1546 if (scan
->suffix
!= NULL
) {
1547 /* yes, so truncate the name */
1549 len
-= strlen(subname
) - namelen
;
1553 #endif /* PYOS_OS2 */
1554 strcpy(buf
+len
, fdp
->suffix
);
1555 if (Py_VerboseFlag
> 1)
1556 PySys_WriteStderr("# trying %s\n", buf
);
1557 filemode
= fdp
->mode
;
1558 if (filemode
[0] == 'U')
1559 filemode
= "r" PY_STDIOTEXTMODE
;
1560 fp
= fopen(buf
, filemode
);
1562 if (case_ok(buf
, len
, namelen
, name
))
1564 else { /* continue search */
1569 #if defined(PYOS_OS2)
1570 /* restore the saved snapshot */
1571 strcpy(buf
, saved_buf
);
1573 namelen
= saved_namelen
;
1576 #if defined(PYOS_OS2)
1577 /* don't need/want the module name snapshot anymore */
1589 PyErr_Format(PyExc_ImportError
,
1590 "No module named %.200s", name
);
1602 /* Helpers for main.c
1603 * Find the source file corresponding to a named module
1606 _PyImport_FindModule(const char *name
, PyObject
*path
, char *buf
,
1607 size_t buflen
, FILE **p_fp
, PyObject
**p_loader
)
1609 return find_module((char *) name
, (char *) name
, path
,
1610 buf
, buflen
, p_fp
, p_loader
);
1613 PyAPI_FUNC(int) _PyImport_IsScript(struct filedescr
* fd
)
1615 return fd
->type
== PY_SOURCE
|| fd
->type
== PY_COMPILED
;
1618 /* case_ok(char* buf, Py_ssize_t len, Py_ssize_t namelen, char* name)
1619 * The arguments here are tricky, best shown by example:
1620 * /a/b/c/d/e/f/g/h/i/j/k/some_long_module_name.py\0
1622 * |--------------------- buf ---------------------|
1623 * |------------------- len ------------------|
1624 * |------ name -------|
1625 * |----- namelen -----|
1626 * buf is the full path, but len only counts up to (& exclusive of) the
1627 * extension. name is the module name, also exclusive of extension.
1629 * We've already done a successful stat() or fopen() on buf, so know that
1630 * there's some match, possibly case-insensitive.
1632 * case_ok() is to return 1 if there's a case-sensitive match for
1633 * name, else 0. case_ok() is also to return 1 if envar PYTHONCASEOK
1636 * case_ok() is used to implement case-sensitive import semantics even
1637 * on platforms with case-insensitive filesystems. It's trivial to implement
1638 * for case-sensitive filesystems. It's pretty much a cross-platform
1639 * nightmare for systems with case-insensitive filesystems.
1642 /* First we may need a pile of platform-specific header files; the sequence
1643 * of #if's here should match the sequence in the body of case_ok().
1645 #if defined(MS_WINDOWS)
1646 #include <windows.h>
1648 #elif defined(DJGPP)
1651 #elif (defined(__MACH__) && defined(__APPLE__) || defined(__CYGWIN__)) && defined(HAVE_DIRENT_H)
1652 #include <sys/types.h>
1655 #elif defined(PYOS_OS2)
1657 #define INCL_DOSERRORS
1658 #define INCL_NOPMAPI
1661 #elif defined(RISCOS)
1662 #include "oslib/osfscontrol.h"
1666 case_ok(char *buf
, Py_ssize_t len
, Py_ssize_t namelen
, char *name
)
1668 /* Pick a platform-specific implementation; the sequence of #if's here should
1669 * match the sequence just above.
1673 #if defined(MS_WINDOWS)
1674 WIN32_FIND_DATA data
;
1677 if (Py_GETENV("PYTHONCASEOK") != NULL
)
1680 h
= FindFirstFile(buf
, &data
);
1681 if (h
== INVALID_HANDLE_VALUE
) {
1682 PyErr_Format(PyExc_NameError
,
1683 "Can't find file for module %.100s\n(filename %.300s)",
1688 return strncmp(data
.cFileName
, name
, namelen
) == 0;
1691 #elif defined(DJGPP)
1695 if (Py_GETENV("PYTHONCASEOK") != NULL
)
1698 done
= findfirst(buf
, &ffblk
, FA_ARCH
|FA_RDONLY
|FA_HIDDEN
|FA_DIREC
);
1700 PyErr_Format(PyExc_NameError
,
1701 "Can't find file for module %.100s\n(filename %.300s)",
1705 return strncmp(ffblk
.ff_name
, name
, namelen
) == 0;
1707 /* new-fangled macintosh (macosx) or Cygwin */
1708 #elif (defined(__MACH__) && defined(__APPLE__) || defined(__CYGWIN__)) && defined(HAVE_DIRENT_H)
1711 char dirname
[MAXPATHLEN
+ 1];
1712 const int dirlen
= len
- namelen
- 1; /* don't want trailing SEP */
1714 if (Py_GETENV("PYTHONCASEOK") != NULL
)
1717 /* Copy the dir component into dirname; substitute "." if empty */
1723 assert(dirlen
<= MAXPATHLEN
);
1724 memcpy(dirname
, buf
, dirlen
);
1725 dirname
[dirlen
] = '\0';
1727 /* Open the directory and search the entries for an exact match. */
1728 dirp
= opendir(dirname
);
1730 char *nameWithExt
= buf
+ len
- namelen
;
1731 while ((dp
= readdir(dirp
)) != NULL
) {
1733 #ifdef _DIRENT_HAVE_D_NAMELEN
1738 if (thislen
>= namelen
&&
1739 strcmp(dp
->d_name
, nameWithExt
) == 0) {
1740 (void)closedir(dirp
);
1741 return 1; /* Found */
1744 (void)closedir(dirp
);
1746 return 0 ; /* Not found */
1749 #elif defined(RISCOS)
1750 char canon
[MAXPATHLEN
+1]; /* buffer for the canonical form of the path */
1751 char buf2
[MAXPATHLEN
+2];
1752 char *nameWithExt
= buf
+len
-namelen
;
1756 if (Py_GETENV("PYTHONCASEOK") != NULL
)
1760 append wildcard, otherwise case of filename wouldn't be touched */
1764 e
= xosfscontrol_canonicalise_path(buf2
,canon
,0,0,MAXPATHLEN
+1,&canonlen
);
1765 canonlen
= MAXPATHLEN
+1-canonlen
;
1766 if (e
|| canonlen
<=0 || canonlen
>(MAXPATHLEN
+1) )
1768 if (strcmp(nameWithExt
, canon
+canonlen
-strlen(nameWithExt
))==0)
1769 return 1; /* match */
1774 #elif defined(PYOS_OS2)
1780 if (Py_GETENV("PYTHONCASEOK") != NULL
)
1783 rc
= DosFindFirst(buf
,
1785 FILE_READONLY
| FILE_HIDDEN
| FILE_SYSTEM
| FILE_DIRECTORY
,
1786 &ffbuf
, sizeof(ffbuf
),
1791 return strncmp(ffbuf
.achName
, name
, namelen
) == 0;
1793 /* assuming it's a case-sensitive filesystem, so there's nothing to do! */
1802 /* Helper to look for __init__.py or __init__.py[co] in potential package */
1804 find_init_module(char *buf
)
1806 const size_t save_len
= strlen(buf
);
1807 size_t i
= save_len
;
1808 char *pname
; /* pointer to start of __init__ */
1809 struct stat statbuf
;
1811 /* For calling case_ok(buf, len, namelen, name):
1812 * /a/b/c/d/e/f/g/h/i/j/k/some_long_module_name.py\0
1814 * |--------------------- buf ---------------------|
1815 * |------------------- len ------------------|
1816 * |------ name -------|
1817 * |----- namelen -----|
1819 if (save_len
+ 13 >= MAXPATHLEN
)
1823 strcpy(pname
, "__init__.py");
1824 if (stat(buf
, &statbuf
) == 0) {
1826 save_len
+ 9, /* len("/__init__") */
1827 8, /* len("__init__") */
1829 buf
[save_len
] = '\0';
1834 strcpy(buf
+i
, Py_OptimizeFlag
? "o" : "c");
1835 if (stat(buf
, &statbuf
) == 0) {
1837 save_len
+ 9, /* len("/__init__") */
1838 8, /* len("__init__") */
1840 buf
[save_len
] = '\0';
1844 buf
[save_len
] = '\0';
1852 find_init_module(buf
)
1855 int save_len
= strlen(buf
);
1858 if (save_len
+ 13 >= MAXPATHLEN
)
1861 strcpy(buf
+i
, "__init__/py");
1863 buf
[save_len
] = '\0';
1867 if (Py_OptimizeFlag
)
1872 buf
[save_len
] = '\0';
1875 buf
[save_len
] = '\0';
1880 #endif /* HAVE_STAT */
1883 static int init_builtin(char *); /* Forward */
1885 /* Load an external module using the default search path and return
1886 its module object WITH INCREMENTED REFERENCE COUNT */
1889 load_module(char *name
, FILE *fp
, char *pathname
, int type
, PyObject
*loader
)
1895 /* First check that there's an open file (if we need one) */
1900 PyErr_Format(PyExc_ValueError
,
1901 "file object required for import (type code %d)",
1910 m
= load_source_module(name
, pathname
, fp
);
1914 m
= load_compiled_module(name
, pathname
, fp
);
1917 #ifdef HAVE_DYNAMIC_LOADING
1919 m
= _PyImport_LoadDynamicModule(name
, pathname
, fp
);
1924 m
= load_package(name
, pathname
);
1929 if (pathname
!= NULL
&& pathname
[0] != '\0')
1931 if (type
== C_BUILTIN
)
1932 err
= init_builtin(name
);
1934 err
= PyImport_ImportFrozenModule(name
);
1938 PyErr_Format(PyExc_ImportError
,
1939 "Purported %s module %.200s not found",
1941 "builtin" : "frozen",
1945 modules
= PyImport_GetModuleDict();
1946 m
= PyDict_GetItemString(modules
, name
);
1950 "%s module %.200s not properly initialized",
1952 "builtin" : "frozen",
1960 if (loader
== NULL
) {
1961 PyErr_SetString(PyExc_ImportError
,
1962 "import hook without loader");
1965 m
= PyObject_CallMethod(loader
, "load_module", "s", name
);
1970 PyErr_Format(PyExc_ImportError
,
1971 "Don't know how to import %.200s (type code %d)",
1981 /* Initialize a built-in module.
1982 Return 1 for success, 0 if the module is not found, and -1 with
1983 an exception set if the initialization failed. */
1986 init_builtin(char *name
)
1990 if (_PyImport_FindExtension(name
, name
) != NULL
)
1993 for (p
= PyImport_Inittab
; p
->name
!= NULL
; p
++) {
1994 if (strcmp(name
, p
->name
) == 0) {
1995 if (p
->initfunc
== NULL
) {
1996 PyErr_Format(PyExc_ImportError
,
1997 "Cannot re-init internal module %.200s",
2002 PySys_WriteStderr("import %s # builtin\n", name
);
2004 if (PyErr_Occurred())
2006 if (_PyImport_FixupExtension(name
, name
) == NULL
)
2015 /* Frozen modules */
2017 static struct _frozen
*
2018 find_frozen(char *name
)
2022 for (p
= PyImport_FrozenModules
; ; p
++) {
2023 if (p
->name
== NULL
)
2025 if (strcmp(p
->name
, name
) == 0)
2032 get_frozen_object(char *name
)
2034 struct _frozen
*p
= find_frozen(name
);
2038 PyErr_Format(PyExc_ImportError
,
2039 "No such frozen object named %.200s",
2043 if (p
->code
== NULL
) {
2044 PyErr_Format(PyExc_ImportError
,
2045 "Excluded frozen object named %.200s",
2052 return PyMarshal_ReadObjectFromString((char *)p
->code
, size
);
2055 /* Initialize a frozen module.
2056 Return 1 for succes, 0 if the module is not found, and -1 with
2057 an exception set if the initialization failed.
2058 This function is also used from frozenmain.c */
2061 PyImport_ImportFrozenModule(char *name
)
2063 struct _frozen
*p
= find_frozen(name
);
2071 if (p
->code
== NULL
) {
2072 PyErr_Format(PyExc_ImportError
,
2073 "Excluded frozen object named %.200s",
2078 ispackage
= (size
< 0);
2082 PySys_WriteStderr("import %s # frozen%s\n",
2083 name
, ispackage
? " package" : "");
2084 co
= PyMarshal_ReadObjectFromString((char *)p
->code
, size
);
2087 if (!PyCode_Check(co
)) {
2088 PyErr_Format(PyExc_TypeError
,
2089 "frozen object %.200s is not a code object",
2094 /* Set __path__ to the package name */
2097 m
= PyImport_AddModule(name
);
2100 d
= PyModule_GetDict(m
);
2101 s
= PyString_InternFromString(name
);
2104 err
= PyDict_SetItemString(d
, "__path__", s
);
2109 m
= PyImport_ExecCodeModuleEx(name
, co
, "<frozen>");
2121 /* Import a module, either built-in, frozen, or external, and return
2122 its module object WITH INCREMENTED REFERENCE COUNT */
2125 PyImport_ImportModule(const char *name
)
2130 pname
= PyString_FromString(name
);
2133 result
= PyImport_Import(pname
);
2138 /* Import a module without blocking
2140 * At first it tries to fetch the module from sys.modules. If the module was
2141 * never loaded before it loads it with PyImport_ImportModule() unless another
2142 * thread holds the import lock. In the latter case the function raises an
2143 * ImportError instead of blocking.
2145 * Returns the module object with incremented ref count.
2148 PyImport_ImportModuleNoBlock(const char *name
)
2156 /* Try to get the module from sys.modules[name] */
2157 modules
= PyImport_GetModuleDict();
2158 if (modules
== NULL
)
2161 result
= PyDict_GetItemString(modules
, name
);
2162 if (result
!= NULL
) {
2170 /* check the import lock
2171 * me might be -1 but I ignore the error here, the lock function
2172 * takes care of the problem */
2173 me
= PyThread_get_thread_ident();
2174 if (import_lock_thread
== -1 || import_lock_thread
== me
) {
2175 /* no thread or me is holding the lock */
2176 return PyImport_ImportModule(name
);
2179 PyErr_Format(PyExc_ImportError
,
2180 "Failed to import %.200s because the import lock"
2181 "is held by another thread.",
2186 return PyImport_ImportModule(name
);
2190 /* Forward declarations for helper routines */
2191 static PyObject
*get_parent(PyObject
*globals
, char *buf
,
2192 Py_ssize_t
*p_buflen
, int level
);
2193 static PyObject
*load_next(PyObject
*mod
, PyObject
*altmod
,
2194 char **p_name
, char *buf
, Py_ssize_t
*p_buflen
);
2195 static int mark_miss(char *name
);
2196 static int ensure_fromlist(PyObject
*mod
, PyObject
*fromlist
,
2197 char *buf
, Py_ssize_t buflen
, int recursive
);
2198 static PyObject
* import_submodule(PyObject
*mod
, char *name
, char *fullname
);
2200 /* The Magnum Opus of dotted-name import :-) */
2203 import_module_level(char *name
, PyObject
*globals
, PyObject
*locals
,
2204 PyObject
*fromlist
, int level
)
2207 Py_ssize_t buflen
= 0;
2208 PyObject
*parent
, *head
, *next
, *tail
;
2210 if (strchr(name
, '/') != NULL
2212 || strchr(name
, '\\') != NULL
2215 PyErr_SetString(PyExc_ImportError
,
2216 "Import by filename is not supported.");
2220 buf
= PyMem_MALLOC(MAXPATHLEN
+1);
2222 return PyErr_NoMemory();
2224 parent
= get_parent(globals
, buf
, &buflen
, level
);
2228 head
= load_next(parent
, level
< 0 ? Py_None
: parent
, &name
, buf
,
2236 next
= load_next(tail
, tail
, &name
, buf
, &buflen
);
2244 if (tail
== Py_None
) {
2245 /* If tail is Py_None, both get_parent and load_next found
2246 an empty module name: someone called __import__("") or
2247 doctored faulty bytecode */
2250 PyErr_SetString(PyExc_ValueError
,
2251 "Empty module name");
2255 if (fromlist
!= NULL
) {
2256 int b
= (fromlist
== Py_None
) ? 0 : PyObject_IsTrue(fromlist
);
2266 if (fromlist
== NULL
) {
2273 if (!ensure_fromlist(tail
, fromlist
, buf
, buflen
, 0)) {
2287 PyImport_ImportModuleLevel(char *name
, PyObject
*globals
, PyObject
*locals
,
2288 PyObject
*fromlist
, int level
)
2291 _PyImport_AcquireLock();
2292 result
= import_module_level(name
, globals
, locals
, fromlist
, level
);
2293 if (_PyImport_ReleaseLock() < 0) {
2295 PyErr_SetString(PyExc_RuntimeError
,
2296 "not holding the import lock");
2302 /* Return the package that an import is being performed in. If globals comes
2303 from the module foo.bar.bat (not itself a package), this returns the
2304 sys.modules entry for foo.bar. If globals is from a package's __init__.py,
2305 the package's entry in sys.modules is returned, as a borrowed reference.
2307 The *name* of the returned package is returned in buf, with the length of
2308 the name in *p_buflen.
2310 If globals doesn't come from a package or a module in a package, or a
2311 corresponding entry is not found in sys.modules, Py_None is returned.
2314 get_parent(PyObject
*globals
, char *buf
, Py_ssize_t
*p_buflen
, int level
)
2316 static PyObject
*namestr
= NULL
;
2317 static PyObject
*pathstr
= NULL
;
2318 static PyObject
*pkgstr
= NULL
;
2319 PyObject
*pkgname
, *modname
, *modpath
, *modules
, *parent
;
2320 int orig_level
= level
;
2322 if (globals
== NULL
|| !PyDict_Check(globals
) || !level
)
2325 if (namestr
== NULL
) {
2326 namestr
= PyString_InternFromString("__name__");
2327 if (namestr
== NULL
)
2330 if (pathstr
== NULL
) {
2331 pathstr
= PyString_InternFromString("__path__");
2332 if (pathstr
== NULL
)
2335 if (pkgstr
== NULL
) {
2336 pkgstr
= PyString_InternFromString("__package__");
2343 pkgname
= PyDict_GetItem(globals
, pkgstr
);
2345 if ((pkgname
!= NULL
) && (pkgname
!= Py_None
)) {
2346 /* __package__ is set, so use it */
2348 if (!PyString_Check(pkgname
)) {
2349 PyErr_SetString(PyExc_ValueError
,
2350 "__package__ set to non-string");
2353 len
= PyString_GET_SIZE(pkgname
);
2356 PyErr_SetString(PyExc_ValueError
,
2357 "Attempted relative import in non-package");
2362 if (len
> MAXPATHLEN
) {
2363 PyErr_SetString(PyExc_ValueError
,
2364 "Package name too long");
2367 strcpy(buf
, PyString_AS_STRING(pkgname
));
2369 /* __package__ not set, so figure it out and set it */
2370 modname
= PyDict_GetItem(globals
, namestr
);
2371 if (modname
== NULL
|| !PyString_Check(modname
))
2374 modpath
= PyDict_GetItem(globals
, pathstr
);
2375 if (modpath
!= NULL
) {
2376 /* __path__ is set, so modname is already the package name */
2377 Py_ssize_t len
= PyString_GET_SIZE(modname
);
2379 if (len
> MAXPATHLEN
) {
2380 PyErr_SetString(PyExc_ValueError
,
2381 "Module name too long");
2384 strcpy(buf
, PyString_AS_STRING(modname
));
2385 error
= PyDict_SetItem(globals
, pkgstr
, modname
);
2387 PyErr_SetString(PyExc_ValueError
,
2388 "Could not set __package__");
2392 /* Normal module, so work out the package name if any */
2393 char *start
= PyString_AS_STRING(modname
);
2394 char *lastdot
= strrchr(start
, '.');
2397 if (lastdot
== NULL
&& level
> 0) {
2398 PyErr_SetString(PyExc_ValueError
,
2399 "Attempted relative import in non-package");
2402 if (lastdot
== NULL
) {
2403 error
= PyDict_SetItem(globals
, pkgstr
, Py_None
);
2405 PyErr_SetString(PyExc_ValueError
,
2406 "Could not set __package__");
2411 len
= lastdot
- start
;
2412 if (len
>= MAXPATHLEN
) {
2413 PyErr_SetString(PyExc_ValueError
,
2414 "Module name too long");
2417 strncpy(buf
, start
, len
);
2419 pkgname
= PyString_FromString(buf
);
2420 if (pkgname
== NULL
) {
2423 error
= PyDict_SetItem(globals
, pkgstr
, pkgname
);
2426 PyErr_SetString(PyExc_ValueError
,
2427 "Could not set __package__");
2432 while (--level
> 0) {
2433 char *dot
= strrchr(buf
, '.');
2435 PyErr_SetString(PyExc_ValueError
,
2436 "Attempted relative import beyond "
2437 "toplevel package");
2442 *p_buflen
= strlen(buf
);
2444 modules
= PyImport_GetModuleDict();
2445 parent
= PyDict_GetItemString(modules
, buf
);
2446 if (parent
== NULL
) {
2447 if (orig_level
< 1) {
2448 PyObject
*err_msg
= PyString_FromFormat(
2449 "Parent module '%.200s' not found "
2450 "while handling absolute import", buf
);
2451 if (err_msg
== NULL
) {
2454 if (!PyErr_WarnEx(PyExc_RuntimeWarning
,
2455 PyString_AsString(err_msg
), 1)) {
2462 PyErr_Format(PyExc_SystemError
,
2463 "Parent module '%.200s' not loaded, "
2464 "cannot perform relative import", buf
);
2468 /* We expect, but can't guarantee, if parent != None, that:
2469 - parent.__name__ == buf
2470 - parent.__dict__ is globals
2471 If this is violated... Who cares? */
2474 /* altmod is either None or same as mod */
2476 load_next(PyObject
*mod
, PyObject
*altmod
, char **p_name
, char *buf
,
2477 Py_ssize_t
*p_buflen
)
2479 char *name
= *p_name
;
2480 char *dot
= strchr(name
, '.');
2485 if (strlen(name
) == 0) {
2486 /* completely empty module name should only happen in
2487 'from . import' (or '__import__("")')*/
2502 PyErr_SetString(PyExc_ValueError
,
2503 "Empty module name");
2507 p
= buf
+ *p_buflen
;
2510 if (p
+len
-buf
>= MAXPATHLEN
) {
2511 PyErr_SetString(PyExc_ValueError
,
2512 "Module name too long");
2515 strncpy(p
, name
, len
);
2517 *p_buflen
= p
+len
-buf
;
2519 result
= import_submodule(mod
, p
, buf
);
2520 if (result
== Py_None
&& altmod
!= mod
) {
2522 /* Here, altmod must be None and mod must not be None */
2523 result
= import_submodule(altmod
, p
, p
);
2524 if (result
!= NULL
&& result
!= Py_None
) {
2525 if (mark_miss(buf
) != 0) {
2529 strncpy(buf
, name
, len
);
2537 if (result
== Py_None
) {
2539 PyErr_Format(PyExc_ImportError
,
2540 "No module named %.200s", name
);
2548 mark_miss(char *name
)
2550 PyObject
*modules
= PyImport_GetModuleDict();
2551 return PyDict_SetItemString(modules
, name
, Py_None
);
2555 ensure_fromlist(PyObject
*mod
, PyObject
*fromlist
, char *buf
, Py_ssize_t buflen
,
2560 if (!PyObject_HasAttrString(mod
, "__path__"))
2563 for (i
= 0; ; i
++) {
2564 PyObject
*item
= PySequence_GetItem(fromlist
, i
);
2567 if (PyErr_ExceptionMatches(PyExc_IndexError
)) {
2573 if (!PyString_Check(item
)) {
2574 PyErr_SetString(PyExc_TypeError
,
2575 "Item in ``from list'' not a string");
2579 if (PyString_AS_STRING(item
)[0] == '*') {
2582 /* See if the package defines __all__ */
2584 continue; /* Avoid endless recursion */
2585 all
= PyObject_GetAttrString(mod
, "__all__");
2589 int ret
= ensure_fromlist(mod
, all
, buf
, buflen
, 1);
2596 hasit
= PyObject_HasAttr(mod
, item
);
2598 char *subname
= PyString_AS_STRING(item
);
2601 if (buflen
+ strlen(subname
) >= MAXPATHLEN
) {
2602 PyErr_SetString(PyExc_ValueError
,
2603 "Module name too long");
2610 submod
= import_submodule(mod
, subname
, buf
);
2612 if (submod
== NULL
) {
2624 add_submodule(PyObject
*mod
, PyObject
*submod
, char *fullname
, char *subname
,
2629 /* Irrespective of the success of this load, make a
2630 reference to it in the parent package module. A copy gets
2631 saved in the modules dictionary under the full name, so get a
2632 reference from there, if need be. (The exception is when the
2633 load failed with a SyntaxError -- then there's no trace in
2634 sys.modules. In that case, of course, do nothing extra.) */
2635 if (submod
== NULL
) {
2636 submod
= PyDict_GetItemString(modules
, fullname
);
2640 if (PyModule_Check(mod
)) {
2641 /* We can't use setattr here since it can give a
2642 * spurious warning if the submodule name shadows a
2644 PyObject
*dict
= PyModule_GetDict(mod
);
2647 if (PyDict_SetItemString(dict
, subname
, submod
) < 0)
2651 if (PyObject_SetAttrString(mod
, subname
, submod
) < 0)
2658 import_submodule(PyObject
*mod
, char *subname
, char *fullname
)
2660 PyObject
*modules
= PyImport_GetModuleDict();
2664 if mod == None: subname == fullname
2665 else: mod.__name__ + "." + subname == fullname
2668 if ((m
= PyDict_GetItemString(modules
, fullname
)) != NULL
) {
2672 PyObject
*path
, *loader
= NULL
;
2674 struct filedescr
*fdp
;
2680 path
= PyObject_GetAttrString(mod
, "__path__");
2688 buf
= PyMem_MALLOC(MAXPATHLEN
+1);
2690 return PyErr_NoMemory();
2693 fdp
= find_module(fullname
, subname
, path
, buf
, MAXPATHLEN
+1,
2698 if (!PyErr_ExceptionMatches(PyExc_ImportError
))
2704 m
= load_module(fullname
, fp
, buf
, fdp
->type
, loader
);
2708 if (!add_submodule(mod
, m
, fullname
, subname
, modules
)) {
2719 /* Re-import a module of any kind and return its module object, WITH
2720 INCREMENTED REFERENCE COUNT */
2723 PyImport_ReloadModule(PyObject
*m
)
2725 PyInterpreterState
*interp
= PyThreadState_Get()->interp
;
2726 PyObject
*modules_reloading
= interp
->modules_reloading
;
2727 PyObject
*modules
= PyImport_GetModuleDict();
2728 PyObject
*path
= NULL
, *loader
= NULL
, *existing_m
= NULL
;
2729 char *name
, *subname
;
2731 struct filedescr
*fdp
;
2735 if (modules_reloading
== NULL
) {
2736 Py_FatalError("PyImport_ReloadModule: "
2737 "no modules_reloading dictionary!");
2741 if (m
== NULL
|| !PyModule_Check(m
)) {
2742 PyErr_SetString(PyExc_TypeError
,
2743 "reload() argument must be module");
2746 name
= PyModule_GetName(m
);
2749 if (m
!= PyDict_GetItemString(modules
, name
)) {
2750 PyErr_Format(PyExc_ImportError
,
2751 "reload(): module %.200s not in sys.modules",
2755 existing_m
= PyDict_GetItemString(modules_reloading
, name
);
2756 if (existing_m
!= NULL
) {
2757 /* Due to a recursive reload, this module is already
2759 Py_INCREF(existing_m
);
2762 if (PyDict_SetItemString(modules_reloading
, name
, m
) < 0)
2765 subname
= strrchr(name
, '.');
2766 if (subname
== NULL
)
2769 PyObject
*parentname
, *parent
;
2770 parentname
= PyString_FromStringAndSize(name
, (subname
-name
));
2771 if (parentname
== NULL
) {
2772 imp_modules_reloading_clear();
2775 parent
= PyDict_GetItem(modules
, parentname
);
2776 if (parent
== NULL
) {
2777 PyErr_Format(PyExc_ImportError
,
2778 "reload(): parent %.200s not in sys.modules",
2779 PyString_AS_STRING(parentname
));
2780 Py_DECREF(parentname
);
2781 imp_modules_reloading_clear();
2784 Py_DECREF(parentname
);
2786 path
= PyObject_GetAttrString(parent
, "__path__");
2790 buf
= PyMem_MALLOC(MAXPATHLEN
+1);
2793 return PyErr_NoMemory();
2796 fdp
= find_module(name
, subname
, path
, buf
, MAXPATHLEN
+1, &fp
, &loader
);
2801 imp_modules_reloading_clear();
2806 newm
= load_module(name
, fp
, buf
, fdp
->type
, loader
);
2812 /* load_module probably removed name from modules because of
2813 * the error. Put back the original module object. We're
2814 * going to return NULL in this case regardless of whether
2815 * replacing name succeeds, so the return value is ignored.
2817 PyDict_SetItemString(modules
, name
, m
);
2819 imp_modules_reloading_clear();
2825 /* Higher-level import emulator which emulates the "import" statement
2826 more accurately -- it invokes the __import__() function from the
2827 builtins of the current globals. This means that the import is
2828 done using whatever import hooks are installed in the current
2829 environment, e.g. by "rexec".
2830 A dummy list ["__doc__"] is passed as the 4th argument so that
2831 e.g. PyImport_Import(PyString_FromString("win32com.client.gencache"))
2832 will return <module "gencache"> instead of <module "win32com">. */
2835 PyImport_Import(PyObject
*module_name
)
2837 static PyObject
*silly_list
= NULL
;
2838 static PyObject
*builtins_str
= NULL
;
2839 static PyObject
*import_str
= NULL
;
2840 PyObject
*globals
= NULL
;
2841 PyObject
*import
= NULL
;
2842 PyObject
*builtins
= NULL
;
2845 /* Initialize constant string objects */
2846 if (silly_list
== NULL
) {
2847 import_str
= PyString_InternFromString("__import__");
2848 if (import_str
== NULL
)
2850 builtins_str
= PyString_InternFromString("__builtins__");
2851 if (builtins_str
== NULL
)
2853 silly_list
= Py_BuildValue("[s]", "__doc__");
2854 if (silly_list
== NULL
)
2858 /* Get the builtins from current globals */
2859 globals
= PyEval_GetGlobals();
2860 if (globals
!= NULL
) {
2862 builtins
= PyObject_GetItem(globals
, builtins_str
);
2863 if (builtins
== NULL
)
2867 /* No globals -- use standard builtins, and fake globals */
2868 builtins
= PyImport_ImportModuleLevel("__builtin__",
2869 NULL
, NULL
, NULL
, 0);
2870 if (builtins
== NULL
)
2872 globals
= Py_BuildValue("{OO}", builtins_str
, builtins
);
2873 if (globals
== NULL
)
2877 /* Get the __import__ function from the builtins */
2878 if (PyDict_Check(builtins
)) {
2879 import
= PyObject_GetItem(builtins
, import_str
);
2881 PyErr_SetObject(PyExc_KeyError
, import_str
);
2884 import
= PyObject_GetAttr(builtins
, import_str
);
2888 /* Call the __import__ function with the proper argument list
2889 * Always use absolute import here. */
2890 r
= PyObject_CallFunction(import
, "OOOOi", module_name
, globals
,
2891 globals
, silly_list
, 0, NULL
);
2894 Py_XDECREF(globals
);
2895 Py_XDECREF(builtins
);
2902 /* Module 'imp' provides Python access to the primitives used for
2907 imp_get_magic(PyObject
*self
, PyObject
*noargs
)
2911 buf
[0] = (char) ((pyc_magic
>> 0) & 0xff);
2912 buf
[1] = (char) ((pyc_magic
>> 8) & 0xff);
2913 buf
[2] = (char) ((pyc_magic
>> 16) & 0xff);
2914 buf
[3] = (char) ((pyc_magic
>> 24) & 0xff);
2916 return PyString_FromStringAndSize(buf
, 4);
2920 imp_get_suffixes(PyObject
*self
, PyObject
*noargs
)
2923 struct filedescr
*fdp
;
2925 list
= PyList_New(0);
2928 for (fdp
= _PyImport_Filetab
; fdp
->suffix
!= NULL
; fdp
++) {
2929 PyObject
*item
= Py_BuildValue("ssi",
2930 fdp
->suffix
, fdp
->mode
, fdp
->type
);
2935 if (PyList_Append(list
, item
) < 0) {
2946 call_find_module(char *name
, PyObject
*path
)
2948 extern int fclose(FILE *);
2949 PyObject
*fob
, *ret
;
2950 struct filedescr
*fdp
;
2954 pathname
= PyMem_MALLOC(MAXPATHLEN
+1);
2955 if (pathname
== NULL
) {
2956 return PyErr_NoMemory();
2959 if (path
== Py_None
)
2961 fdp
= find_module(NULL
, name
, path
, pathname
, MAXPATHLEN
+1, &fp
, NULL
);
2963 PyMem_FREE(pathname
);
2967 fob
= PyFile_FromFile(fp
, pathname
, fdp
->mode
, fclose
);
2969 PyMem_FREE(pathname
);
2977 ret
= Py_BuildValue("Os(ssi)",
2978 fob
, pathname
, fdp
->suffix
, fdp
->mode
, fdp
->type
);
2980 PyMem_FREE(pathname
);
2985 imp_find_module(PyObject
*self
, PyObject
*args
)
2988 PyObject
*path
= NULL
;
2989 if (!PyArg_ParseTuple(args
, "s|O:find_module", &name
, &path
))
2991 return call_find_module(name
, path
);
2995 imp_init_builtin(PyObject
*self
, PyObject
*args
)
3000 if (!PyArg_ParseTuple(args
, "s:init_builtin", &name
))
3002 ret
= init_builtin(name
);
3009 m
= PyImport_AddModule(name
);
3015 imp_init_frozen(PyObject
*self
, PyObject
*args
)
3020 if (!PyArg_ParseTuple(args
, "s:init_frozen", &name
))
3022 ret
= PyImport_ImportFrozenModule(name
);
3029 m
= PyImport_AddModule(name
);
3035 imp_get_frozen_object(PyObject
*self
, PyObject
*args
)
3039 if (!PyArg_ParseTuple(args
, "s:get_frozen_object", &name
))
3041 return get_frozen_object(name
);
3045 imp_is_builtin(PyObject
*self
, PyObject
*args
)
3048 if (!PyArg_ParseTuple(args
, "s:is_builtin", &name
))
3050 return PyInt_FromLong(is_builtin(name
));
3054 imp_is_frozen(PyObject
*self
, PyObject
*args
)
3058 if (!PyArg_ParseTuple(args
, "s:is_frozen", &name
))
3060 p
= find_frozen(name
);
3061 return PyBool_FromLong((long) (p
== NULL
? 0 : p
->size
));
3065 get_file(char *pathname
, PyObject
*fob
, char *mode
)
3070 mode
= "r" PY_STDIOTEXTMODE
;
3071 fp
= fopen(pathname
, mode
);
3073 PyErr_SetFromErrno(PyExc_IOError
);
3076 fp
= PyFile_AsFile(fob
);
3078 PyErr_SetString(PyExc_ValueError
,
3079 "bad/closed file object");
3085 imp_load_compiled(PyObject
*self
, PyObject
*args
)
3089 PyObject
*fob
= NULL
;
3092 if (!PyArg_ParseTuple(args
, "ss|O!:load_compiled", &name
, &pathname
,
3093 &PyFile_Type
, &fob
))
3095 fp
= get_file(pathname
, fob
, "rb");
3098 m
= load_compiled_module(name
, pathname
, fp
);
3104 #ifdef HAVE_DYNAMIC_LOADING
3107 imp_load_dynamic(PyObject
*self
, PyObject
*args
)
3111 PyObject
*fob
= NULL
;
3114 if (!PyArg_ParseTuple(args
, "ss|O!:load_dynamic", &name
, &pathname
,
3115 &PyFile_Type
, &fob
))
3118 fp
= get_file(pathname
, fob
, "r");
3122 m
= _PyImport_LoadDynamicModule(name
, pathname
, fp
);
3126 #endif /* HAVE_DYNAMIC_LOADING */
3129 imp_load_source(PyObject
*self
, PyObject
*args
)
3133 PyObject
*fob
= NULL
;
3136 if (!PyArg_ParseTuple(args
, "ss|O!:load_source", &name
, &pathname
,
3137 &PyFile_Type
, &fob
))
3139 fp
= get_file(pathname
, fob
, "r");
3142 m
= load_source_module(name
, pathname
, fp
);
3149 imp_load_module(PyObject
*self
, PyObject
*args
)
3154 char *suffix
; /* Unused */
3159 if (!PyArg_ParseTuple(args
, "sOs(ssi):load_module",
3160 &name
, &fob
, &pathname
,
3161 &suffix
, &mode
, &type
))
3164 /* Mode must start with 'r' or 'U' and must not contain '+'.
3165 Implicit in this test is the assumption that the mode
3166 may contain other modifiers like 'b' or 't'. */
3168 if (!(*mode
== 'r' || *mode
== 'U') || strchr(mode
, '+')) {
3169 PyErr_Format(PyExc_ValueError
,
3170 "invalid file open mode %.200s", mode
);
3177 if (!PyFile_Check(fob
)) {
3178 PyErr_SetString(PyExc_ValueError
,
3179 "load_module arg#2 should be a file or None");
3182 fp
= get_file(pathname
, fob
, mode
);
3186 return load_module(name
, fp
, pathname
, type
, NULL
);
3190 imp_load_package(PyObject
*self
, PyObject
*args
)
3194 if (!PyArg_ParseTuple(args
, "ss:load_package", &name
, &pathname
))
3196 return load_package(name
, pathname
);
3200 imp_new_module(PyObject
*self
, PyObject
*args
)
3203 if (!PyArg_ParseTuple(args
, "s:new_module", &name
))
3205 return PyModule_New(name
);
3209 imp_reload(PyObject
*self
, PyObject
*v
)
3211 return PyImport_ReloadModule(v
);
3217 PyDoc_STRVAR(doc_imp
,
3218 "This module provides the components needed to build your own\n\
3219 __import__ function. Undocumented functions are obsolete.");
3221 PyDoc_STRVAR(doc_reload
,
3222 "reload(module) -> module\n\
3224 Reload the module. The module must have been successfully imported before.");
3226 PyDoc_STRVAR(doc_find_module
,
3227 "find_module(name, [path]) -> (file, filename, (suffix, mode, type))\n\
3228 Search for a module. If path is omitted or None, search for a\n\
3229 built-in, frozen or special module and continue search in sys.path.\n\
3230 The module name cannot contain '.'; to search for a submodule of a\n\
3231 package, pass the submodule name and the package's __path__.");
3233 PyDoc_STRVAR(doc_load_module
,
3234 "load_module(name, file, filename, (suffix, mode, type)) -> module\n\
3235 Load a module, given information returned by find_module().\n\
3236 The module name must include the full package name, if any.");
3238 PyDoc_STRVAR(doc_get_magic
,
3239 "get_magic() -> string\n\
3240 Return the magic number for .pyc or .pyo files.");
3242 PyDoc_STRVAR(doc_get_suffixes
,
3243 "get_suffixes() -> [(suffix, mode, type), ...]\n\
3244 Return a list of (suffix, mode, type) tuples describing the files\n\
3245 that find_module() looks for.");
3247 PyDoc_STRVAR(doc_new_module
,
3248 "new_module(name) -> module\n\
3249 Create a new module. Do not enter it in sys.modules.\n\
3250 The module name must include the full package name, if any.");
3252 PyDoc_STRVAR(doc_lock_held
,
3253 "lock_held() -> boolean\n\
3254 Return True if the import lock is currently held, else False.\n\
3255 On platforms without threads, return False.");
3257 PyDoc_STRVAR(doc_acquire_lock
,
3258 "acquire_lock() -> None\n\
3259 Acquires the interpreter's import lock for the current thread.\n\
3260 This lock should be used by import hooks to ensure thread-safety\n\
3261 when importing modules.\n\
3262 On platforms without threads, this function does nothing.");
3264 PyDoc_STRVAR(doc_release_lock
,
3265 "release_lock() -> None\n\
3266 Release the interpreter's import lock.\n\
3267 On platforms without threads, this function does nothing.");
3269 static PyMethodDef imp_methods
[] = {
3270 {"reload", imp_reload
, METH_O
, doc_reload
},
3271 {"find_module", imp_find_module
, METH_VARARGS
, doc_find_module
},
3272 {"get_magic", imp_get_magic
, METH_NOARGS
, doc_get_magic
},
3273 {"get_suffixes", imp_get_suffixes
, METH_NOARGS
, doc_get_suffixes
},
3274 {"load_module", imp_load_module
, METH_VARARGS
, doc_load_module
},
3275 {"new_module", imp_new_module
, METH_VARARGS
, doc_new_module
},
3276 {"lock_held", imp_lock_held
, METH_NOARGS
, doc_lock_held
},
3277 {"acquire_lock", imp_acquire_lock
, METH_NOARGS
, doc_acquire_lock
},
3278 {"release_lock", imp_release_lock
, METH_NOARGS
, doc_release_lock
},
3279 /* The rest are obsolete */
3280 {"get_frozen_object", imp_get_frozen_object
, METH_VARARGS
},
3281 {"init_builtin", imp_init_builtin
, METH_VARARGS
},
3282 {"init_frozen", imp_init_frozen
, METH_VARARGS
},
3283 {"is_builtin", imp_is_builtin
, METH_VARARGS
},
3284 {"is_frozen", imp_is_frozen
, METH_VARARGS
},
3285 {"load_compiled", imp_load_compiled
, METH_VARARGS
},
3286 #ifdef HAVE_DYNAMIC_LOADING
3287 {"load_dynamic", imp_load_dynamic
, METH_VARARGS
},
3289 {"load_package", imp_load_package
, METH_VARARGS
},
3290 {"load_source", imp_load_source
, METH_VARARGS
},
3291 {NULL
, NULL
} /* sentinel */
3295 setint(PyObject
*d
, char *name
, int value
)
3300 v
= PyInt_FromLong((long)value
);
3301 err
= PyDict_SetItemString(d
, name
, v
);
3311 NullImporter_init(NullImporter
*self
, PyObject
*args
, PyObject
*kwds
)
3316 if (!_PyArg_NoKeywords("NullImporter()", kwds
))
3319 if (!PyArg_ParseTuple(args
, "s:NullImporter",
3323 pathlen
= strlen(path
);
3325 PyErr_SetString(PyExc_ImportError
, "empty pathname");
3329 PyErr_SetString(PyExc_ImportError
,
3330 "existing directory");
3338 NullImporter_find_module(NullImporter
*self
, PyObject
*args
)
3343 static PyMethodDef NullImporter_methods
[] = {
3344 {"find_module", (PyCFunction
)NullImporter_find_module
, METH_VARARGS
,
3345 "Always return None"
3347 {NULL
} /* Sentinel */
3351 PyTypeObject PyNullImporter_Type
= {
3352 PyVarObject_HEAD_INIT(NULL
, 0)
3353 "imp.NullImporter", /*tp_name*/
3354 sizeof(NullImporter
), /*tp_basicsize*/
3363 0, /*tp_as_sequence*/
3364 0, /*tp_as_mapping*/
3371 Py_TPFLAGS_DEFAULT
, /*tp_flags*/
3372 "Null importer object", /* tp_doc */
3373 0, /* tp_traverse */
3375 0, /* tp_richcompare */
3376 0, /* tp_weaklistoffset */
3378 0, /* tp_iternext */
3379 NullImporter_methods
, /* tp_methods */
3384 0, /* tp_descr_get */
3385 0, /* tp_descr_set */
3386 0, /* tp_dictoffset */
3387 (initproc
)NullImporter_init
, /* tp_init */
3389 PyType_GenericNew
/* tp_new */
3398 if (PyType_Ready(&PyNullImporter_Type
) < 0)
3401 m
= Py_InitModule4("imp", imp_methods
, doc_imp
,
3402 NULL
, PYTHON_API_VERSION
);
3405 d
= PyModule_GetDict(m
);
3409 if (setint(d
, "SEARCH_ERROR", SEARCH_ERROR
) < 0) goto failure
;
3410 if (setint(d
, "PY_SOURCE", PY_SOURCE
) < 0) goto failure
;
3411 if (setint(d
, "PY_COMPILED", PY_COMPILED
) < 0) goto failure
;
3412 if (setint(d
, "C_EXTENSION", C_EXTENSION
) < 0) goto failure
;
3413 if (setint(d
, "PY_RESOURCE", PY_RESOURCE
) < 0) goto failure
;
3414 if (setint(d
, "PKG_DIRECTORY", PKG_DIRECTORY
) < 0) goto failure
;
3415 if (setint(d
, "C_BUILTIN", C_BUILTIN
) < 0) goto failure
;
3416 if (setint(d
, "PY_FROZEN", PY_FROZEN
) < 0) goto failure
;
3417 if (setint(d
, "PY_CODERESOURCE", PY_CODERESOURCE
) < 0) goto failure
;
3418 if (setint(d
, "IMP_HOOK", IMP_HOOK
) < 0) goto failure
;
3420 Py_INCREF(&PyNullImporter_Type
);
3421 PyModule_AddObject(m
, "NullImporter", (PyObject
*)&PyNullImporter_Type
);
3427 /* API for embedding applications that want to add their own entries
3428 to the table of built-in modules. This should normally be called
3429 *before* Py_Initialize(). When the table resize fails, -1 is
3430 returned and the existing table is unchanged.
3432 After a similar function by Just van Rossum. */
3435 PyImport_ExtendInittab(struct _inittab
*newtab
)
3437 static struct _inittab
*our_copy
= NULL
;
3441 /* Count the number of entries in both tables */
3442 for (n
= 0; newtab
[n
].name
!= NULL
; n
++)
3445 return 0; /* Nothing to do */
3446 for (i
= 0; PyImport_Inittab
[i
].name
!= NULL
; i
++)
3449 /* Allocate new memory for the combined table */
3451 PyMem_RESIZE(p
, struct _inittab
, i
+n
+1);
3455 /* Copy the tables into the new memory */
3456 if (our_copy
!= PyImport_Inittab
)
3457 memcpy(p
, PyImport_Inittab
, (i
+1) * sizeof(struct _inittab
));
3458 PyImport_Inittab
= our_copy
= p
;
3459 memcpy(p
+i
, newtab
, (n
+1) * sizeof(struct _inittab
));
3464 /* Shorthand to add a single entry given a name and a function */
3467 PyImport_AppendInittab(const char *name
, void (*initfunc
)(void))
3469 struct _inittab newtab
[2];
3471 memset(newtab
, '\0', sizeof newtab
);
3473 newtab
[0].name
= (char *)name
;
3474 newtab
[0].initfunc
= initfunc
;
3476 return PyImport_ExtendInittab(newtab
);