#include "Python.h"#include "structmember.h"#include "osdefs.h"#include "marshal.h"#include <time.h>  #define IS_SOURCE   0x0#define IS_BYTECODE 0x1#define IS_PACKAGE  0x2 struct st_zip_searchorder {	char suffix[14];	int type;}; /* zip_searchorder defines how we search for a module in the Zip   archive: we first search for a package __init__, then for   non-package .pyc, .pyo and .py entries. The .pyc and .pyo entries   are swapped by initzipimport() if we run in optimized mode. Also,   '/' is replaced by SEP there. */static struct st_zip_searchorder zip_searchorder[] = {	{"/__init__.pyc", IS_PACKAGE | IS_BYTECODE},	{"/__init__.pyo", IS_PACKAGE | IS_BYTECODE},	{"/__init__.py", IS_PACKAGE | IS_SOURCE},	{".pyc", IS_BYTECODE},	{".pyo", IS_BYTECODE},	{".py", IS_SOURCE},	{"", 0}}; /* zipimporter object definition and support */ typedef struct _zipimporter ZipImporter; struct _zipimporter {	PyObject_HEAD	PyObject *archive;  /* pathname of the Zip archive */	PyObject *prefix;   /* file prefix: "a/sub/directory/" */	PyObject *files;    /* dict with file info {path: toc_entry} */}; static PyObject *ZipImportError;static PyObject *zip_directory_cache = NULL; /* forward decls */static PyObject *read_directory(char *archive);static PyObject *get_data(char *archive, PyObject *toc_entry);static PyObject *get_module_code(ZipImporter *self, char *fullname,				 int *p_ispackage, char **p_modpath);  #define ZipImporter_Check(op) PyObject_TypeCheck(op, &ZipImporter_Type)  /* zipimporter.__init__   Split the "subdirectory" from the Zip archive path, lookup a matching   entry in sys.path_importer_cache, fetch the file directory from there   if found, or else read it from the archive. */static intzipimporter_init(ZipImporter *self, PyObject *args, PyObject *kwds){	char *path, *p, *prefix, buf[MAXPATHLEN+2];	size_t len; 	if (!_PyArg_NoKeywords("zipimporter()", kwds))		return -1; 	if (!PyArg_ParseTuple(args, "s:zipimporter",			      &path))		return -1; 	len = strlen(path);	if (len == 0) {		PyErr_SetString(ZipImportError, "archive path is empty");		return -1;	}	if (len >= MAXPATHLEN) {		PyErr_SetString(ZipImportError,				"archive path too long");		return -1;	}	strcpy(buf, path); #ifdef ALTSEP	for (p = buf; *p; p++) {		if (*p == ALTSEP)			*p = SEP;	}#endif 	path = NULL;	prefix = NULL;	for (;;) {#ifndef RISCOS		struct stat statbuf;		int rv; 		rv = stat(buf, &statbuf);		if (rv == 0) {			/* it exists */			if (S_ISREG(statbuf.st_mode))				/* it's a file */				path = buf;			break;		}#else		if (object_exists(buf)) {			/* it exists */			if (isfile(buf))				/* it's a file */				path = buf;			break;		}#endif		/* back up one path element */		p = strrchr(buf, SEP);		if (prefix != NULL)			*prefix = SEP;		if (p == NULL)			break;		*p = '\0';		prefix = p;	}	if (path != NULL) {		PyObject *files;		files = PyDict_GetItemString(zip_directory_cache, path);		if (files == NULL) {			files = read_directory(buf);			if (files == NULL)				return -1;			if (PyDict_SetItemString(zip_directory_cache, path,						 files) != 0)				return -1;		}		else			Py_INCREF(files);		self->files = files;	}	else {		PyErr_SetString(ZipImportError, "not a Zip file");		return -1;	} 	if (prefix == NULL)		prefix = "";	else {		prefix++;		len = strlen(prefix);		if (prefix[len-1] != SEP) {			/* add trailing SEP */			prefix[len] = SEP;			prefix[len + 1] = '\0';		}	} 	self->archive = PyString_FromString(buf);	if (self->archive == NULL)		return -1; 	self->prefix = PyString_FromString(prefix);	if (self->prefix == NULL)		return -1; 	return 0;} /* GC support. */static intzipimporter_traverse(PyObject *obj, visitproc visit, void *arg){	ZipImporter *self = (ZipImporter *)obj;	Py_VISIT(self->files);	return 0;} static voidzipimporter_dealloc(ZipImporter *self){	PyObject_GC_UnTrack(self);	Py_XDECREF(self->archive);	Py_XDECREF(self->prefix);	Py_XDECREF(self->files);	self->ob_type->tp_free((PyObject *)self);} static PyObject *zipimporter_repr(ZipImporter *self){	char buf[500];	char *archive = "???";	char *prefix = ""; 	if (self->archive != NULL && PyString_Check(self->archive))		archive = PyString_AsString(self->archive);	if (self->prefix != NULL && PyString_Check(self->prefix))		prefix = PyString_AsString(self->prefix);	if (prefix != NULL && *prefix)		PyOS_snprintf(buf, sizeof(buf),			      "<zipimporter object \"%.300s%c%.150s\">",			      archive, SEP, prefix);	else		PyOS_snprintf(buf, sizeof(buf),			      "<zipimporter object \"%.300s\">",			      archive);	return PyString_FromString(buf);} /* return fullname.split(".")[-1] */static char *get_subname(char *fullname){	char *subname = strrchr(fullname, '.');	if (subname == NULL)		subname = fullname;	else		subname++;	return subname;} /* Given a (sub)modulename, write the potential file path in the   archive (without extension) to the path buffer. Return the   length of the resulting string. */static intmake_filename(char *prefix, char *name, char *path){	size_t len;	char *p; 	len = strlen(prefix); 	/* self.prefix + name [+ SEP + "__init__"] + ".py[co]" */	if (len + strlen(name) + 13 >= MAXPATHLEN) {		PyErr_SetString(ZipImportError, "path too long");		return -1;	} 	strcpy(path, prefix);	strcpy(path + len, name);	for (p = path + len; *p; p++) {		if (*p == '.')			*p = SEP;	}	len += strlen(name);	assert(len < INT_MAX);	return (int)len;} enum zi_module_info {	MI_ERROR,	MI_NOT_FOUND,	MI_MODULE,	MI_PACKAGE}; /* Return some information about a module. */static enum zi_module_infoget_module_info(ZipImporter *self, char *fullname){	char *subname, path[MAXPATHLEN + 1];	int len;	struct st_zip_searchorder *zso; 	subname = get_subname(fullname); 	len = make_filename(PyString_AsString(self->prefix), subname, path);	if (len < 0)		return MI_ERROR; 	for (zso = zip_searchorder; *zso->suffix; zso++) {		strcpy(path + len, zso->suffix);		if (PyDict_GetItemString(self->files, path) != NULL) {			if (zso->type & IS_PACKAGE)				return MI_PACKAGE;			else				return MI_MODULE;		}	}	return MI_NOT_FOUND;} /* Check whether we can satisfy the import of the module named by   'fullname'. Return self if we can, None if we can't. */static PyObject *zipimporter_find_module(PyObject *obj, PyObject *args){	ZipImporter *self = (ZipImporter *)obj;	PyObject *path = NULL;	char *fullname;	enum zi_module_info mi; 	if (!PyArg_ParseTuple(args, "s|O:zipimporter.find_module",			      &fullname, &path))		return NULL; 	mi = get_module_info(self, fullname);	if (mi == MI_ERROR)		return NULL;	if (mi == MI_NOT_FOUND) {		Py_INCREF(Py_None);		return Py_None;	}	Py_INCREF(self);	return (PyObject *)self;} /* Load and return the module named by 'fullname'. */static PyObject *zipimporter_load_module(PyObject *obj, PyObject *args){	ZipImporter *self = (ZipImporter *)obj;	PyObject *code, *mod, *dict;	char *fullname, *modpath;	int ispackage; 	if (!PyArg_ParseTuple(args, "s:zipimporter.load_module",			      &fullname))		return NULL; 	code = get_module_code(self, fullname, &ispackage, &modpath);	if (code == NULL)		return NULL; 	mod = PyImport_AddModule(fullname);	if (mod == NULL) {		Py_DECREF(code);		return NULL;	}	dict = PyModule_GetDict(mod); 	/* mod.__loader__ = self */	if (PyDict_SetItemString(dict, "__loader__", (PyObject *)self) != 0)		goto error; 	if (ispackage) {		/* add __path__ to the module *before* the code gets		   executed */		PyObject *pkgpath, *fullpath;		char *prefix = PyString_AsString(self->prefix);		char *subname = get_subname(fullname);		int err; 		fullpath = PyString_FromFormat("%s%c%s%s",					PyString_AsString(self->archive),					SEP,					*prefix ? prefix : "",					subname);		if (fullpath == NULL)			goto error; 		pkgpath = Py_BuildValue("[O]", fullpath);		Py_DECREF(fullpath);		if (pkgpath == NULL)			goto error;		err = PyDict_SetItemString(dict, "__path__", pkgpath);		Py_DECREF(pkgpath);		if (err != 0)			goto error;	}	mod = PyImport_ExecCodeModuleEx(fullname, code, modpath);	Py_DECREF(code);	if (Py_VerboseFlag)		PySys_WriteStderr("import %s # loaded from Zip %s\n",				  fullname, modpath);	return mod;error:	Py_DECREF(code);	Py_DECREF(mod);	return NULL;} /* Return a bool signifying whether the module is a package or not. */static PyObject *zipimporter_is_package(PyObject *obj, PyObject *args){	ZipImporter *self = (ZipImporter *)obj;	char *fullname;	enum zi_module_info mi; 	if (!PyArg_ParseTuple(args, "s:zipimporter.is_package",			      &fullname))		return NULL; 	mi = get_module_info(self, fullname);	if (mi == MI_ERROR)		return NULL;	if (mi == MI_NOT_FOUND) {		PyErr_Format(ZipImportError, "can't find module '%.200s'",			     fullname);		return NULL;	}	return PyBool_FromLong(mi == MI_PACKAGE);} static PyObject *zipimporter_get_data(PyObject *obj, PyObject *args){	ZipImporter *self = (ZipImporter *)obj;	char *path;#ifdef ALTSEP	char *p, buf[MAXPATHLEN + 1];#endif	PyObject *toc_entry;	Py_ssize_t len; 	if (!PyArg_ParseTuple(args, "s:zipimporter.get_data", &path))		return NULL; #ifdef ALTSEP	if (strlen(path) >= MAXPATHLEN) {		PyErr_SetString(ZipImportError, "path too long");		return NULL;	}	strcpy(buf, path);	for (p = buf; *p; p++) {		if (*p == ALTSEP)			*p = SEP;	}	path = buf;#endif	len = PyString_Size(self->archive);	if ((size_t)len < strlen(path) &&	    strncmp(path, PyString_AsString(self->archive), len) == 0 &&	    path[len] == SEP) {		path = path + len + 1;	} 	toc_entry = PyDict_GetItemString(self->files, path);	if (toc_entry == NULL) {		PyErr_SetFromErrnoWithFilename(PyExc_IOError, path);		return NULL;	}	return get_data(PyString_AsString(self->archive), toc_entry);} static PyObject *zipimporter_get_code(PyObject *obj, PyObject *args){	ZipImporter *self = (ZipImporter *)obj;	char *fullname; 	if (!PyArg_ParseTuple(args, "s:zipimporter.get_code", &fullname))		return NULL; 	return get_module_code(self, fullname, NULL, NULL);} static PyObject *zipimporter_get_source(PyObject *obj, PyObject *args){	ZipImporter *self = (ZipImporter *)obj;	PyObject *toc_entry;	char *fullname, *subname, path[MAXPATHLEN+1];	int len;	enum zi_module_info mi; 	if (!PyArg_ParseTuple(args, "s:zipimporter.get_source", &fullname))		return NULL; 	mi = get_module_info(self, fullname);	if (mi == MI_ERROR)		return NULL;	if (mi == MI_NOT_FOUND) {		PyErr_Format(ZipImportError, "can't find module '%.200s'",			     fullname);		return NULL;	}	subname = get_subname(fullname); 	len = make_filename(PyString_AsString(self->prefix), subname, path);	if (len < 0)		return NULL; 	if (mi == MI_PACKAGE) {		path[len] = SEP;		strcpy(path + len + 1, "__init__.py");	}	else		strcpy(path + len, ".py"); 	toc_entry = PyDict_GetItemString(self->files, path);	if (toc_entry != NULL)		return get_data(PyString_AsString(self->archive), toc_entry); 	/* we have the module, but no source */	Py_INCREF(Py_None);	return Py_None;} PyDoc_STRVAR(doc_find_module,"find_module(fullname, path=None) -> self or None.\n\\n\Search for a module specified by 'fullname'. 'fullname' must be the\n\fully qualified (dotted) module name. It returns the zipimporter\n\instance itself if the module was found, or None if it wasn't.\n\The optional 'path' argument is ignored -- it's there for compatibility\n\with the importer protocol."); PyDoc_STRVAR(doc_load_module,"load_module(fullname) -> module.\n\

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