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