int CLASS nikon_e995()
{
  int i, histo[256];
  const uchar often[] = { 0x00, 0x55, 0xaa, 0xff };

  memset (histo, 0, sizeof histo);
  fseek (ifp, -2000, SEEK_END);
  for (i=0; i < 2000; i++)
    histo[fgetc(ifp)]++;
  for (i=0; i < 4; i++)
    if (histo[often[i]] < 200)
      return 0;
  return 1;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.