Function LCMapStringAuto

Src/Common/unicoder.cpp:1384–1419

using LCMapStringEx_t = int (WINAPI*)(LPCWSTR lpLocaleName, DWORD dwMapFlags, LPCWSTR lpSrcStr, int cchSrc, LPWSTR lpDestStr, int cchDest, LPNLSVERSIONINFO lpVersionInformation, LPVOID lpReserved, LPARAM sortHandle);

static String LCMapStringAuto(const String& input, unsigned mapFlags)
{
	if (input.empty())
		return input;

	static LCMapStringEx_t pLCMapStringEx = nullptr;
	static bool checked = false;

	if (!checked)
	{
		HMODULE hKernel32 = GetModuleHandleW(L"kernel32.dll");
		if (hKernel32)
			pLCMapStringEx = reinterpret_cast<LCMapStringEx_t>(GetProcAddress(hKernel32, "LCMapStringEx"));
		checked = true;
	}

	if (pLCMapStringEx)
	{
		int len = pLCMapStringEx(nullptr, mapFlags, input.c_str(), static_cast<int>(input.size()), nullptr, 0, nullptr, nullptr, 0);
		if (len <= 0)
			return input;
		std::wstring result(len, L'\0');
		pLCMapStringEx(nullptr, mapFlags, input.c_str(), static_cast<int>(input.size()), result.data(), len, nullptr, nullptr, 0);
		return result;
	}

	// XP fallback
	int len = LCMapStringW(LOCALE_USER_DEFAULT, mapFlags, input.c_str(), static_cast<int>(input.size()), nullptr, 0);
	if (len <= 0)
		return input;

	std::wstring result(len, L'\0');
	LCMapStringW(LOCALE_USER_DEFAULT, mapFlags, input.c_str(), static_cast<int>(input.size()), result.data(), len);

	return result;
}

String toUpper(const String& s)
{