static unsigned zlib_decompress(unsigned char** out, size_t* outsize, const unsigned char* in,
                                size_t insize, const LodePNGDecompressSettings* settings)
{
  if (!settings->custom_zlib) return 87; /*no custom zlib function provided */
  return settings->custom_zlib(out, outsize, in, insize, settings);
}
Unknown