Function Convert

LuaSTGPlus/UnicodeStringEncoding.cpp:228–273

template<typename decoder_t, typename encoder_t, typename char_t = char, typename orgchar_t>
void Convert(const orgchar_t* nullTerminatedString, std::basic_string<char_t>& ret)
{
	decoder_t decoder;
	encoder_t encoder;

	ret.clear();
	char32_t ucs4;
	bool de_finished = true;
	uint8_t* buf;
	size_t size = 0;
	bool en_finished = true;

	const char* p = (const char*)nullTerminatedString;
	while (*nullTerminatedString != 0)
	{
		if (decoder(*p, ucs4))
		{
			de_finished = true;
			if (encoder(ucs4, buf, size))
			{
				en_finished = true;

				if (buf)
				{
					if (size % sizeof(char_t) != 0)
						ret.push_back((char_t)'?');
					else
						ret.append(reinterpret_cast<char_t*>(buf), size / sizeof(char_t));
				}
			}
			else
				en_finished = false;
		}
		else
			de_finished = false;

		++p;
		if ((size_t)p - (size_t)nullTerminatedString == sizeof(orgchar_t))
			++nullTerminatedString;
	}

	if (!de_finished)
		ret.push_back((char_t)'?');
	else if (!en_finished)
		ret.push_back((char_t)'?');
}

std::wstring LuaSTGPlus::Utf8ToUtf16(const char* p)
{