bool UTF8ToUTF32(const std::string& utf8, std::u32string& outUtf32)
{
if (utf8.empty())
{
outUtf32.clear();
return true;
}
bool ret = false;
const size_t utf32Bytes = (utf8.length() + 1) * sizeof(char32_t);
char32_t* utf32 = (char32_t*)malloc(utf32Bytes);
memset(utf32, 0, utf32Bytes);
char* utf32ptr = reinterpret_cast<char*>(utf32);
const UTF8* error = NULL;
if (llvm::ConvertUTF8toWide(4, utf8, utf32ptr, error))
{
outUtf32 = utf32;
ret = true;
}
free(utf32);
return ret;
}
void utf8::decode(const char* str, size_t len, std::u32string& decoded) {
decoded.clear();
while (len)
decoded.push_back(decode(str, len));
}
void utf8::decode(const char* str, std::u32string& decoded) {
decoded.clear();
for (char32_t chr; (chr = decode(str)); )
decoded.push_back(chr);
}