Function _cupsRasterReadHeader

cups/raster-stream.c:592–748

 */

unsigned				/* O - 1 on success, 0 on fail */
_cupsRasterReadHeader(
    cups_raster_t *r)			/* I - Raster stream */
{
  size_t	len;			/* Length for read/swap */


  DEBUG_printf(("3_cupsRasterReadHeader(r=%p), r->mode=%s", (void *)r, r ? cups_modes[r->mode] : ""));

  if (r == NULL || r->mode != CUPS_RASTER_READ)
    return (0);

  DEBUG_printf(("4_cupsRasterReadHeader: r->iocount=" CUPS_LLFMT, CUPS_LLCAST r->iocount));

  memset(&(r->header), 0, sizeof(r->header));

 /*
  * Read the header...
  */

  switch (r->sync)
  {
    default :
       /*
	* Get the length of the raster header...
	*/

	if (r->sync == CUPS_RASTER_SYNCv1 || r->sync == CUPS_RASTER_REVSYNCv1)
	  len = sizeof(cups_page_header_t);
	else
	  len = sizeof(cups_page_header2_t);

	DEBUG_printf(("4_cupsRasterReadHeader: len=%d", (int)len));

       /*
        * Read it...
        */

	if (cups_raster_read(r, (unsigned char *)&(r->header), len) < (ssize_t)len)
	{
	  DEBUG_printf(("4_cupsRasterReadHeader: EOF, r->iocount=" CUPS_LLFMT, CUPS_LLCAST r->iocount));
	  return (0);
	}

       /*
	* Swap bytes as needed...
	*/

	if (r->swapped)
	{
	  unsigned	*s,		/* Current word */
			temp;		/* Temporary copy */


	  DEBUG_puts("4_cupsRasterReadHeader: Swapping header bytes.");

	  for (len = 81, s = &(r->header.AdvanceDistance);
	       len > 0;