Function ImTextCountUtf8BytesFromStr

imgui_tiny_app/imgui/imgui.cpp:2804–2816

}

int ImTextCountUtf8BytesFromStr(const ImWchar* in_text, const ImWchar* in_text_end)
{
    int bytes_count = 0;
    while ((!in_text_end || in_text < in_text_end) && *in_text)
    {
        unsigned int c = (unsigned int)(*in_text++);
        if (c < 0x80)
            bytes_count++;
        else
            bytes_count += ImTextCountUtf8BytesFromChar(c);
    }
    return bytes_count;
}

const char* ImTextFindPreviousUtf8Codepoint(const char* in_text_start, const char* in_p)
{