mirror of
https://github.com/python/cpython.git
synced 2025-11-03 03:22:27 +00:00
107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/********************************************************************
|
|
|
|
import_nt.c
|
|
|
|
Win32 specific import code.
|
|
|
|
*/
|
|
|
|
#include "Python.h"
|
|
#include "osdefs.h"
|
|
#include <windows.h>
|
|
#include "importdl.h"
|
|
#include "malloc.h" /* for alloca */
|
|
|
|
/* a string loaded from the DLL at startup */
|
|
extern const char *PyWin_DLLVersionString;
|
|
|
|
/* Find a module on Windows.
|
|
|
|
Read the registry Software\Python\PythonCore\<version>\Modules\<name> (or
|
|
Software\Python\PythonCore\<version>\Modules\<name>\Debug in debug mode)
|
|
from HKEY_CURRENT_USER, or HKEY_LOCAL_MACHINE. Find the file descriptor using
|
|
the file extension. Open the file.
|
|
|
|
On success, write the file descriptor into *ppFileDesc, the module path
|
|
(Unicode object) into *pPath, and return the opened file object. If the
|
|
module cannot be found (e.g. no registry key or the file doesn't exist),
|
|
return NULL. On error, raise a Python exception and return NULL.
|
|
*/
|
|
FILE *
|
|
_PyWin_FindRegisteredModule(PyObject *moduleName,
|
|
struct filedescr **ppFileDesc,
|
|
PyObject **pPath)
|
|
{
|
|
wchar_t pathBuf[MAXPATHLEN+1];
|
|
int pathLen = MAXPATHLEN+1;
|
|
PyObject *path, *moduleKey, *suffix;
|
|
struct filedescr *fdp;
|
|
HKEY keyBase;
|
|
int modNameSize;
|
|
long regStat;
|
|
Py_ssize_t extLen;
|
|
FILE *fp;
|
|
|
|
moduleKey = PyUnicode_FromFormat(
|
|
#ifdef _DEBUG
|
|
/* In debugging builds, we _must_ have the debug version registered */
|
|
"Software\\Python\\PythonCore\\%s\\Modules\\%U\\Debug",
|
|
#else
|
|
"Software\\Python\\PythonCore\\%s\\Modules\\%U",
|
|
#endif
|
|
PyWin_DLLVersionString, moduleName);
|
|
if (moduleKey == NULL)
|
|
return NULL;
|
|
|
|
keyBase = HKEY_CURRENT_USER;
|
|
modNameSize = pathLen;
|
|
regStat = RegQueryValueW(keyBase, PyUnicode_AS_UNICODE(moduleKey),
|
|
pathBuf, &modNameSize);
|
|
if (regStat != ERROR_SUCCESS) {
|
|
/* No user setting - lookup in machine settings */
|
|
keyBase = HKEY_LOCAL_MACHINE;
|
|
/* be anal - failure may have reset size param */
|
|
modNameSize = pathLen;
|
|
regStat = RegQueryValueW(keyBase, PyUnicode_AS_UNICODE(moduleKey),
|
|
pathBuf, &modNameSize);
|
|
if (regStat != ERROR_SUCCESS) {
|
|
Py_DECREF(moduleKey);
|
|
return NULL;
|
|
}
|
|
}
|
|
Py_DECREF(moduleKey);
|
|
if (modNameSize < 3) {
|
|
/* path shorter than "a.o" or negative length (cast to
|
|
size_t is wrong) */
|
|
return NULL;
|
|
}
|
|
/* use the file extension to locate the type entry. */
|
|
for (fdp = _PyImport_Filetab; fdp->suffix != NULL; fdp++) {
|
|
suffix = PyUnicode_FromString(fdp->suffix);
|
|
if (suffix == NULL)
|
|
return NULL;
|
|
extLen = PyUnicode_GET_SIZE(suffix);
|
|
if ((Py_ssize_t)modNameSize > extLen &&
|
|
_wcsnicmp(pathBuf + ((Py_ssize_t)modNameSize-extLen-1),
|
|
PyUnicode_AS_UNICODE(suffix),
|
|
extLen) == 0)
|
|
{
|
|
Py_DECREF(suffix);
|
|
break;
|
|
}
|
|
Py_DECREF(suffix);
|
|
}
|
|
if (fdp->suffix == NULL)
|
|
return NULL;
|
|
path = PyUnicode_FromWideChar(pathBuf, wcslen(pathBuf));
|
|
if (path == NULL)
|
|
return NULL;
|
|
fp = _Py_fopen(path, fdp->mode);
|
|
if (fp == NULL) {
|
|
Py_DECREF(path);
|
|
return NULL;
|
|
}
|
|
*pPath = path;
|
|
*ppFileDesc = fdp;
|
|
return fp;
|
|
}
|