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◆ main openmsx / src / utils / utf8_checked.cc
1.6 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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#ifdef _WIN32
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#include "utf8_checked.hh"
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#include "MSXException.hh"
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#include <windows.h>
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namespace utf8 {
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[[nodiscard]] static std::wstring multiByteToUtf16(std::string_view multiByte, UINT cp, DWORD dwFlags)
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{
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	if (multiByte.empty()) return {};
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	// Get required size for UTF-16 buffer
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	const char* in = multiByte.data();
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	auto inSize = static_cast<int>(multiByte.size());
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	int outSize = MultiByteToWideChar(cp, dwFlags, in, inSize, nullptr, 0);
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	if (outSize == 0) {
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		throw openmsx::FatalError(
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			"MultiByteToWideChar failed: ", GetLastError());
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	}
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	std::wstring utf16;
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	utf16.resize_and_overwrite(outSize, [&](wchar_t* out, size_t) -> size_t {
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		return MultiByteToWideChar(cp, dwFlags, in, inSize, out, outSize);
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	});
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	return utf16;
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}
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[[nodiscard]] static std::string utf16ToMultiByte(std::wstring_view utf16, UINT cp)
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{
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	if (utf16.empty()) return {};
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	// Get required size for multiByte buffer
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	const wchar_t* in = utf16.data();
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	auto inSize = static_cast<int>(utf16.size());
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	int outSize = WideCharToMultiByte(cp, 0, in, inSize, nullptr, 0, nullptr, nullptr);
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	if (outSize == 0) {
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		throw openmsx::FatalError(
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			"WideCharToMultiByte failed: ", GetLastError());
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	}
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	std::string multiByte;
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	multiByte.resize_and_overwrite(outSize, [&](char* out, size_t) -> size_t {
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		return WideCharToMultiByte(cp, 0, in, inSize, out, outSize, nullptr, nullptr);
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	});
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	return multiByte;
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}
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std::wstring utf8to16(std::string_view utf8)
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{
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	return multiByteToUtf16(utf8, CP_UTF8, MB_ERR_INVALID_CHARS);
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}
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std::string utf16to8(std::wstring_view utf16)
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{
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	return utf16ToMultiByte(utf16, CP_UTF8);
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}
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} // namespace utf8
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#endif // _WIN32