Rooba
/
cpython
mirror of https://github.com/python/cpython.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Mark Hammond writes: 

Also, here is a new version of import_nt.c, which allows you to register a
Debug module in the registry.  While I was there I removed some of the
ugliness - what was I thinking :-)
This commit is contained in:
Guido van Rossum 1998-05-26 13:53:23 +00:00
parent 0f1e1fc3fa
commit 1c096b7289
1 changed files with 13 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
PC/import_nt.c
View File

@ -33,30 +33,25 @@ BOOL PyWin_IsWin32s()
FILE *PyWin_FindRegisteredModule( const char *moduleName, struct filedescr **ppFileDesc, char *pathBuf, int pathLen) FILE *PyWin_FindRegisteredModule( const char *moduleName, struct filedescr **ppFileDesc, char *pathBuf, int pathLen)
{ {
char *moduleKey; char *moduleKey;
char *pos;
const char keyPrefix[] = "Software\\Python\\PythonCore\\"; const char keyPrefix[] = "Software\\Python\\PythonCore\\";
const char keySuffix[] = "\\Modules\\"; 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; struct filedescr *fdp = NULL;
FILE *fp; FILE *fp;
int modNameSize = pathLen;
int versionLen, moduleLen;
HKEY keyBase = PyWin_IsWin32s() ? HKEY_CLASSES_ROOT : HKEY_LOCAL_MACHINE; HKEY keyBase = PyWin_IsWin32s() ? HKEY_CLASSES_ROOT : HKEY_LOCAL_MACHINE;
int modNameSize;
// conceptually, this code is setting up: // Calculate the size for the sprintf buffer.
// sprintf(buf, "Software\\Python\\PythonCore\\%s\\Modules\\%s", PyWin_DLLVersionString, moduleName); // Get the size of the chars only, plus 1 NULL.
// the sprintf would be clearer, but slower and less "length-safe" int bufSize = sizeof(keyPrefix)-1 + strlen(PyWin_DLLVersionString) + sizeof(keySuffix) + strlen(moduleName) + sizeof(debugString) - 1;
versionLen = strlen(PyWin_DLLVersionString);
moduleLen = strlen(moduleName);
// alloca == no free required, but memory only local to fn, also no heap fragmentation! // 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. moduleKey = alloca(bufSize);
pos = moduleKey; sprintf(moduleKey, "Software\\Python\\PythonCore\\%s\\Modules\\%s%s", PyWin_DLLVersionString, moduleName, debugString);
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) if (RegQueryValue(keyBase, moduleKey, pathBuf, &modNameSize)!=ERROR_SUCCESS)
return NULL; return NULL;
@ -73,3 +68,4 @@ FILE *PyWin_FindRegisteredModule( const char *moduleName, struct filedescr **ppF
*ppFileDesc = fdp; *ppFileDesc = fdp;
return fp; return fp;
} }