Function advance_input_offset

src/dd.c:1769–1774

   necessary.  */

static void
advance_input_offset (intmax_t offset)
{
  if (0 <= input_offset && ckd_add (&input_offset, input_offset, offset))
    input_offset = -1;
}

/* Throw away RECORDS blocks of BLOCKSIZE bytes plus BYTES bytes on
   file descriptor FDESC, which is open with read permission for FILE.