Function read_hex

cups/testipp.c:1038–1073

 */

ssize_t					/* O - Number of bytes read */
read_hex(cups_file_t *fp,		/* I - File to read from */
         ipp_uchar_t *buffer,		/* I - Buffer to read */
         size_t      bytes)		/* I - Number of bytes to read */
{
  size_t	total = 0;		/* Total bytes read */
  static char	hex[256] = "";		/* Line from file */
  static char	*hexptr = NULL;		/* Pointer in line */


  while (total < bytes)
  {
    if (!hexptr || (isspace(hexptr[0] & 255) && isspace(hexptr[1] & 255)))
    {
      if (!cupsFileGets(fp, hex, sizeof(hex)))
        break;

      hexptr = hex;
      while (isxdigit(*hexptr & 255))
        hexptr ++;
      while (isspace(*hexptr & 255))
        hexptr ++;

      if (!isxdigit(*hexptr & 255))
      {
        hexptr = NULL;
        continue;
      }
    }

    *buffer++ = (ipp_uchar_t)strtol(hexptr, &hexptr, 16);
    total ++;
  }

  return (total == 0 ? -1 : (ssize_t)total);
}


/*