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// Copyright 2021 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "common/WindowsUtils.h"
#include "common/windows_with_undefs.h"
#include <memory>
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);
// When we can use C++17 this can be changed to use string.data() instead.
std::unique_ptr<char[]> result = std::make_unique<char[]>(requiredSize);
WideCharToMultiByte(CP_UTF8, 0, input, -1, result.get(), requiredSize, nullptr, nullptr);
// This will allocate the returned std::string and then destroy result.
return std::string(result.get(), result.get() + (requiredSize - 1));
}