tests/framework/util/wide_char_handling.cpp

/*
 * Copyright (c) 2025 The Khronos Group Inc.
 * Copyright (c) 2025 Valve Corporation
 * Copyright (c) 2025 LunarG, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and/or associated documentation files (the "Materials"), to
 * deal in the Materials without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Materials, and to permit persons to whom the Materials are
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice(s) and this permission notice shall be included in
 * all copies or substantial portions of the Materials.
 *
 * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 *
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR THE
 * USE OR OTHER DEALINGS IN THE MATERIALS.
 *
 */

#include "wide_char_handling.h"

#if defined(_WIN32)

#include "Windows.h"

std::string narrow(const std::wstring& utf16) {
    if (utf16.empty()) {
        return {};
    }
    int size = WideCharToMultiByte(CP_UTF8, 0, utf16.data(), static_cast<int>(utf16.size()), nullptr, 0, nullptr, nullptr);
    if (size <= 0) {
        return {};
    }
    std::string utf8(size, '\0');
    if (WideCharToMultiByte(CP_UTF8, 0, utf16.data(), static_cast<int>(utf16.size()), &utf8[0], size, nullptr, nullptr) != size) {
        return {};
    }
    return utf8;
}

std::wstring widen(const std::string& utf8) {
    if (utf8.empty()) {
        return {};
    }
    int size = MultiByteToWideChar(CP_UTF8, 0, utf8.data(), static_cast<int>(utf8.size()), nullptr, 0);
    if (size <= 0) {
        return {};
    }
    std::wstring utf16(size, L'\0');
    if (MultiByteToWideChar(CP_UTF8, 0, utf8.data(), static_cast<int>(utf8.size()), &utf16[0], size) != size) {
        return {};
    }
    return utf16;
}
#else
std::string narrow(const std::string& utf16) { return utf16; }
std::string widen(const std::string& utf8) { return utf8; }
#endif