Function cupsFileRewind

cups/file.c:1773–1837

 */

off_t					/* O - New file position or -1 on error */
cupsFileRewind(cups_file_t *fp)		/* I - CUPS file */
{
 /*
  * Range check input...
  */

  DEBUG_printf(("cupsFileRewind(fp=%p)", (void *)fp));

  if (!fp || fp->mode != 'r')
    return (-1);

  DEBUG_printf(("2cupsFileRewind: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos));

 /*
  * Handle special cases...
  */

  if (fp->bufpos == 0)
  {
   /*
    * No seeking necessary...
    */

    fp->pos = 0;

    if (fp->ptr)
    {
      fp->ptr = fp->buf;
      fp->eof = 0;
    }

    DEBUG_printf(("2cupsFileRewind: pos=" CUPS_LLFMT, CUPS_LLCAST fp->pos));

    return (0);
  }

 /*
  * Otherwise, seek in the file and cleanup any compression buffers...
  */

#ifdef HAVE_LIBZ
  if (fp->compressed)
  {
    inflateEnd(&fp->stream);
    fp->compressed = 0;
  }
#endif /* HAVE_LIBZ */

  if (lseek(fp->fd, 0, SEEK_SET))
  {
    DEBUG_printf(("1cupsFileRewind: lseek failed: %s", strerror(errno)));
    return (-1);
  }

  fp->bufpos = 0;
  fp->pos    = 0;
  fp->ptr    = NULL;