unsigned lodepng_load_file(unsigned char** out, size_t* outsize, const char* filename) {
  long size = lodepng_filesize(filename);
  if(size < 0) return 78;
  *outsize = (size_t)size;

  *out = (unsigned char*)lodepng_malloc((size_t)size);
  if(!(*out) && size > 0) return 83; /*the above malloc failed*/

  return lodepng_buffer_file(*out, (size_t)size, filename);
}

unsigned lodepng_decode_file(unsigned char** out, unsigned* w, unsigned* h, const char* filename,
                             LodePNGColorType colortype, unsigned bitdepth) {
  unsigned char* buffer = 0;
  size_t buffersize;
  unsigned error;
  /* safe output values in case error happens */
  *out = 0;
  *w = *h = 0;
  error = lodepng_load_file(&buffer, &buffersize, filename);
  if(!error) error = lodepng_decode_memory(out, w, h, buffer, buffersize, colortype, bitdepth);
  lodepng_free(buffer);
  return error;
}