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75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/********************************************************************
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import_nt.c
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Win32 specific import code.
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*/
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#include "Python.h"
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#include "osdefs.h"
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#include <windows.h>
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#include "importdl.h"
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#include "malloc.h" // for alloca
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extern const char *PyWin_DLLVersionString; // a string loaded from the DLL at startup.
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/* Return whether this is Win32s, i.e., Win32 API on Win 3.1(1).
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This function is exported! */
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BOOL PyWin_IsWin32s()
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{
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static BOOL bIsWin32s = -1; /* flag as "not yet looked" */
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if (bIsWin32s == -1) {
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OSVERSIONINFO ver;
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ver.dwOSVersionInfoSize = sizeof(ver);
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GetVersionEx(&ver);
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bIsWin32s = ver.dwPlatformId == VER_PLATFORM_WIN32s;
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}
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return bIsWin32s;
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}
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FILE *PyWin_FindRegisteredModule( const char *moduleName, struct filedescr **ppFileDesc, char *pathBuf, int pathLen)
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{
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char *moduleKey;
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const char keyPrefix[] = "Software\\Python\\PythonCore\\";
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const char keySuffix[] = "\\Modules\\";
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#ifdef _DEBUG
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// In debugging builds, we _must_ have the debug version registered.
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const char debugString[] = "\\Debug";
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#else
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const char debugString[] = "";
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#endif
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struct filedescr *fdp = NULL;
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FILE *fp;
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HKEY keyBase = PyWin_IsWin32s() ? HKEY_CLASSES_ROOT : HKEY_LOCAL_MACHINE;
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int modNameSize;
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long regStat;
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// Calculate the size for the sprintf buffer.
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// Get the size of the chars only, plus 1 NULL.
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int bufSize = sizeof(keyPrefix)-1 + strlen(PyWin_DLLVersionString) + sizeof(keySuffix) + strlen(moduleName) + sizeof(debugString) - 1;
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// alloca == no free required, but memory only local to fn, also no heap fragmentation!
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moduleKey = alloca(bufSize);
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sprintf(moduleKey, "Software\\Python\\PythonCore\\%s\\Modules\\%s%s", PyWin_DLLVersionString, moduleName, debugString);
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modNameSize = pathLen;
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regStat = RegQueryValue(keyBase, moduleKey, pathBuf, &modNameSize);
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if (regStat!=ERROR_SUCCESS)
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return NULL;
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// use the file extension to locate the type entry.
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for (fdp = _PyImport_Filetab; fdp->suffix != NULL; fdp++) {
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int extLen=strlen(fdp->suffix);
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if (modNameSize>extLen && strnicmp(pathBuf+(modNameSize-extLen-1),fdp->suffix,extLen)==0)
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break;
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}
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if (fdp->suffix==NULL)
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return NULL;
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fp = fopen(pathBuf, fdp->mode);
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if (fp != NULL)
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*ppFileDesc = fdp;
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return fp;
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}
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