Simple PNG writer function by Alex Evans, 2011. Released into the public domain: https://gist.github.com/908299, more context at http://altdevblogada

@brief Invert display colors * @param is_reverse 1, reverse color; 0, default */

@brief Partial panel update * @param x Update X coordinate, >>> Must be a multiple of 4 <<< * @param y Update Y coordinate * @param w width of g

converts from a unicode code point to the utf8 equivalent

deep sleep helper - persist any state to disk that may be needed on wake

work out the section index for a toc index

deep sleep helper - retrieve any state from disk after wake

Heap sort of lowercased filenames, used to help accelerate plain central directory searches by mz_zip_reader_locate_file(). (Could also use qsort(), b

handles numeric entities - e.g. &#1234; or &#x1234;

handles named entities - e.g. &amp;