Seem to be some changes related to DLL version from string resource,
again (Mark Hammond is the cause of all this).
diff --git a/PC/import_nt.c b/PC/import_nt.c
index 1eef4d2..7530d2e 100644
--- a/PC/import_nt.c
+++ b/PC/import_nt.c
@@ -10,6 +10,9 @@
#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! */
@@ -29,13 +32,32 @@
FILE *PyWin_FindRegisteredModule( const char *moduleName, struct filedescr **ppFileDesc, char *pathBuf, int pathLen)
{
- char moduleKey[128];
+ char *moduleKey;
+ char *pos;
+ const char keyPrefix[] = "Software\\Python\\PythonCore\\";
+ const char keySuffix[] = "\\Modules\\";
struct filedescr *fdp = NULL;
FILE *fp;
int modNameSize = pathLen;
+ int versionLen, moduleLen;
HKEY keyBase = PyWin_IsWin32s() ? HKEY_CLASSES_ROOT : HKEY_LOCAL_MACHINE;
- strcpy(moduleKey, "Software\\Python\\PythonCore\\" MS_DLL_ID "\\Modules\\");
- strcat(moduleKey, moduleName);
+
+ // conceptually, this code is setting up:
+ // sprintf(buf, "Software\\Python\\PythonCore\\%s\\Modules\\%s", PyWin_DLLVersionString, moduleName);
+ // the sprintf would be clearer, but slower and less "length-safe"
+ versionLen = strlen(PyWin_DLLVersionString);
+ moduleLen = strlen(moduleName);
+ // alloca == no free required, but memory only local to fn, also no heap fragmentation!
+ moduleKey = alloca(sizeof(keyPrefix)-1 + versionLen + sizeof(keySuffix) + moduleLen); // chars only, plus 1 NULL.
+ pos = moduleKey;
+ memcpy(pos, keyPrefix, sizeof(keyPrefix)-1);
+ pos += sizeof(keyPrefix)-1;
+ memcpy(pos, PyWin_DLLVersionString, versionLen);
+ pos +=versionLen;
+ memcpy(pos, keySuffix, sizeof(keySuffix));
+ pos += sizeof(keySuffix)-1;
+ memcpy(pos, moduleName, moduleLen+1); // NULL comes with this one!
+
if (RegQueryValue(keyBase, moduleKey, pathBuf, &modNameSize)!=ERROR_SUCCESS)
return NULL;
// use the file extension to locate the type entry.