void FDesktopPlatformWindows::EnumerateEngineInstallations(TMap<FString, FString> &OutInstallations)
{
// Enumerate the binary installations
EnumerateLauncherEngineInstallations(OutInstallations);
// Enumerate the per-user installations
HKEY hKey;
if (RegOpenKeyEx(HKEY_CURRENT_USER, InstallationsSubKey, 0, KEY_ALL_ACCESS, &hKey) == ERROR_SUCCESS)
{
// Get a list of all the directories
TArray<FString> UniqueDirectories;
OutInstallations.GenerateValueArray(UniqueDirectories);
// Enumerate all the installations
TArray<FString> InvalidKeys;
for (::DWORD Index = 0;; Index++)
{
TCHAR ValueName[256];
TCHAR ValueData[MAX_PATH];
::DWORD ValueType = 0;
::DWORD ValueNameLength = sizeof(ValueName) / sizeof(ValueName[0]);
::DWORD ValueDataSize = sizeof(ValueData);
LRESULT Result = RegEnumValue(hKey, Index, ValueName, &ValueNameLength, NULL, &ValueType, (BYTE*)&ValueData[0], &ValueDataSize);
if(Result == ERROR_SUCCESS)
{
int32 ValueDataLength = ValueDataSize / sizeof(TCHAR);
if(ValueDataLength > 0 && ValueData[ValueDataLength - 1] == 0) ValueDataLength--;
FString NormalizedInstalledDirectory(ValueDataLength, ValueData);
FPaths::NormalizeDirectoryName(NormalizedInstalledDirectory);
FPaths::CollapseRelativeDirectories(NormalizedInstalledDirectory);
if(IsValidRootDirectory(NormalizedInstalledDirectory) && !UniqueDirectories.Contains(NormalizedInstalledDirectory))
{
OutInstallations.Add(ValueName, NormalizedInstalledDirectory);
UniqueDirectories.Add(NormalizedInstalledDirectory);
}
else
{
InvalidKeys.Add(ValueName);
}
}
else if(Result == ERROR_NO_MORE_ITEMS)
{
break;
}
}
// Remove all the keys which weren't valid
for(const FString InvalidKey: InvalidKeys)
{
RegDeleteValue(hKey, *InvalidKey);
}
RegCloseKey(hKey);
}
}
void FDesktopPlatformWindows::EnumerateEngineInstallations(TMap<FString, FString> &OutInstallations)
{
// Enumerate the binary installations
EnumerateLauncherEngineInstallations(OutInstallations);
// Enumerate the per-user installations
HKEY hKey;
if (RegOpenKeyEx(HKEY_CURRENT_USER, InstallationsSubKey, 0, KEY_ALL_ACCESS, &hKey) == ERROR_SUCCESS)
{
// Enumerate all the installations
for (::DWORD Index = 0;; Index++)
{
TCHAR ValueName[256];
TCHAR ValueData[MAX_PATH];
::DWORD ValueType = 0;
::DWORD ValueNameLength = sizeof(ValueName) / sizeof(ValueName[0]);
::DWORD ValueDataSize = sizeof(ValueData);
LRESULT Result = RegEnumValue(hKey, Index, ValueName, &ValueNameLength, NULL, &ValueType, (BYTE*)&ValueData[0], &ValueDataSize);
if(Result == ERROR_SUCCESS)
{
int32 ValueDataLength = ValueDataSize / sizeof(TCHAR);
if(ValueDataLength > 0 && ValueData[ValueDataLength - 1] == 0) ValueDataLength--;
FString NormalizedInstalledDirectory(ValueDataLength, ValueData);
FPaths::NormalizeDirectoryName(NormalizedInstalledDirectory);
OutInstallations.Add(ValueName, NormalizedInstalledDirectory);
}
else if(Result == ERROR_NO_MORE_ITEMS)
{
break;
}
}
// Trim the list to everything that's valid
for(TMap<FString, FString>::TIterator Iter(OutInstallations); Iter; ++Iter)
{
if (!IsValidRootDirectory(Iter.Value()))
{
RegDeleteValue(hKey, *Iter.Key());
Iter.RemoveCurrent();
}
}
RegCloseKey(hKey);
}
}