Function utf32ToUtf16

valdi_core/src/valdi_core/cpp/Text/UTF16Utils.cpp:222–232

}

std::pair<const char16_t*, size_t> utf32ToUtf16(const uint32_t* utf32String, size_t length) {
    thread_local static std::vector<char16_t> tBuffer;
    auto& buffer = tBuffer;

    auto utf16Size = countUtf32ToUtf16(utf32String, length);
    buffer.resize(utf16Size);

    utf32ToUtf16(utf32String, length, buffer.data(), buffer.size());

    return std::make_pair(buffer.data(), buffer.size());
}

size_t countUtf32ToUtf16(uint32_t utf32Character) {
    return utf32Character > 0xFFFF ? 2 : 1;