// Copyright 2021 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "dawn/common/WindowsUtils.h"

#include <memory>

#include "dawn/common/windows_with_undefs.h"

namespace dawn {

std::string WCharToUTF8(const wchar_t* input) {
    // The -1 argument asks WideCharToMultiByte to use the null terminator to know the size of
    // input. It will return a size that includes the null terminator.
    int requiredSize = WideCharToMultiByte(CP_UTF8, 0, input, -1, nullptr, 0, nullptr, nullptr);

    std::string result;
    result.resize(requiredSize - 1);
    WideCharToMultiByte(CP_UTF8, 0, input, -1, result.data(), requiredSize, nullptr, nullptr);

    return result;
}

std::wstring UTF8ToWStr(const char* input) {
    // The -1 argument asks MultiByteToWideChar to use the null terminator to know the size of
    // input. It will return a size that includes the null terminator.
    int requiredSize = MultiByteToWideChar(CP_UTF8, 0, input, -1, nullptr, 0);

    std::wstring result;
    result.resize(requiredSize - 1);
    MultiByteToWideChar(CP_UTF8, 0, input, -1, result.data(), requiredSize);

    return result;
}

}  // namespace dawn