Method ValidateUTF8

lib/base/utility.cpp:1798–1810

const char l_Utf8Replacement[] = "\xEF\xBF\xBD";

String Utility::ValidateUTF8(const String& input)
{
	std::string output;
	output.reserve(input.GetLength());

	try {
		utf8::replace_invalid(input.Begin(), input.End(), std::back_inserter(output));
	} catch (const utf8::not_enough_room&) {
		output.insert(output.end(), (const char*)l_Utf8Replacement, (const char*)l_Utf8Replacement + 3);
	}

	return String(std::move(output));
}

#ifdef _WIN32
/* mkstemp extracted from libc/sysdeps/posix/tempname.c.  Copyright