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properly implement GetModuleFileNameW

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This commit is contained in:
pixel-stuck 2025-08-04 17:10:52 -04:00
parent 5d7a1a7685
commit 0320efcda2
1 changed files with 29 additions and 3 deletions
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32
dll/kernel32.cpp
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@ -1533,11 +1533,37 @@ namespace kernel32 {
DWORD WIN_FUNC GetModuleFileNameW(HMODULE hModule, LPWSTR lpFilename, DWORD nSize) {
DEBUG_LOG("GetModuleFileNameW (hModule=%p, nSize=%i)\n", hModule, nSize);
if (lpFilename == nullptr) {
wibo::lastError = ERROR_INVALID_PARAMETER;
return 0;
}
*lpFilename = 0; // just NUL terminate
std::string path;
if (wibo::isMainModule(hModule)) {
const auto exePath = files::pathFromWindows(wibo::argv[0]);
const auto absPath = std::filesystem::absolute(exePath);
path = files::pathToWindows(absPath);
} else {
path = static_cast<wibo::ModuleInfo *>(hModule)->name;
}
const size_t len = path.size();
if (nSize == 0) {
wibo::lastError = ERROR_INSUFFICIENT_BUFFER;
return 0;
}
wibo::lastError = 0;
return 0;
const size_t copyLen = std::min(len, nSize - 1);
memcpy(lpFilename, stringToWideString(path.c_str()).data(), copyLen);
if (copyLen < nSize) {
lpFilename[copyLen] = 0;
}
if (copyLen < len) {
wibo::lastError = ERROR_INSUFFICIENT_BUFFER;
return nSize;
}
wibo::lastError = ERROR_SUCCESS;
return copyLen;
}
void* WIN_FUNC FindResourceA(void* hModule, const char* lpName, const char* lpType) {