Function ImParseFormatTrimDecorations

tutorials/common/imgui/imgui_widgets.cpp:3206–3216

Extract the format out of a format string with leading or trailing decorations fmt = "blah blah" -> return fmt fmt = "%.3f" -> return fmt fmt = "hello %.3f" -> return fmt + 6 fmt = "%.3f hello" -> return buf written with "%.3f"

//  fmt = "hello %.3f" -> return fmt + 6
//  fmt = "%.3f hello" -> return buf written with "%.3f"
const char* ImParseFormatTrimDecorations(const char* fmt, char* buf, size_t buf_size)
{
    const char* fmt_start = ImParseFormatFindStart(fmt);
    if (fmt_start[0] != '%')
        return fmt;
    const char* fmt_end = ImParseFormatFindEnd(fmt_start);
    if (fmt_end[0] == 0) // If we only have leading decoration, we don't need to copy the data.
        return fmt_start;
    ImStrncpy(buf, fmt_start, ImMin((size_t)(fmt_end - fmt_start) + 1, buf_size));
    return buf;
}

// Sanitize format
// - Zero terminate so extra characters after format (e.g. "%f123") don't confuse atof/atoi