Function countUTF8Chars

core/base/UTF8.cpp:408–430

}

size_t countUTF8Chars(std::string_view utf8)
{
    int count = 0;

    if (!utf8.empty())
    {
        const UTF8* source = (const UTF8*)utf8.data();
        const UTF8* sourceEnd   = (const UTF8*)utf8.data() + utf8.length();
        while (source != sourceEnd)
        {
            auto size = getUTF8SequenceSize(source, sourceEnd);
            if (size == 0)
            {
                // Invalid UTF-8 sequence found
                return 0;
            }
            source += size;
            ++count;
        }
    }
  
    return count;
}

size_t getUTF8ByteOffset(std::string_view utf8, size_t utf8CharOffset)
{