Function inflateNoCompression

src/lodepng.cpp:1186–1214

}

static unsigned inflateNoCompression(ucvector* out, const unsigned char* in, size_t* bp, size_t* pos, size_t inlength)
{
  /*go to first boundary of byte*/
  size_t p;
  unsigned LEN, NLEN, n, error = 0;
  while(((*bp) & 0x7) != 0) (*bp)++;
  p = (*bp) / 8; /*byte position*/

  /*read LEN (2 bytes) and NLEN (2 bytes)*/
  if(p >= inlength - 4) return 52; /*error, bit pointer will jump past memory*/
  LEN = in[p] + 256 * in[p + 1]; p += 2;
  NLEN = in[p] + 256 * in[p + 1]; p += 2;

  /*check if 16-bit NLEN is really the one's complement of LEN*/
  if(LEN + NLEN != 65535) return 21; /*error: NLEN is not one's complement of LEN*/

  if((*pos) + LEN >= out->size)
  {
    if(!ucvector_resize(out, (*pos) + LEN)) return 83; /*alloc fail*/
  }

  /*read the literal data: LEN bytes are now stored in the out buffer*/
  if(p + LEN > inlength) return 23; /*error: reading outside of in buffer*/
  for(n = 0; n < LEN; n++) out->data[(*pos)++] = in[p++];

  (*bp) = p * 8;

  return error;
}

static unsigned lodepng_inflatev(ucvector* out,
                                 const unsigned char* in, size_t insize,