src/tiff/libtiff/tif_flush.c

   1 /* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_flush.c,v 1.3 2000/09/15 20:52:42 warmerda Exp $ */
   2
   3 /*
   4  * Copyright (c) 1988-1997 Sam Leffler
   5  * Copyright (c) 1991-1997 Silicon Graphics, Inc.
   6  *
   7  * Permission to use, copy, modify, distribute, and sell this software and
   8  * its documentation for any purpose is hereby granted without fee, provided
   9  * that (i) the above copyright notices and this permission notice appear in
  10  * all copies of the software and related documentation, and (ii) the names of
  11  * Sam Leffler and Silicon Graphics may not be used in any advertising or
  12  * publicity relating to the software without the specific, prior written
  13  * permission of Sam Leffler and Silicon Graphics.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
  17  * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
  18  *
  19  * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
  20  * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
  21  * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  22  * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
  23  * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  24  * OF THIS SOFTWARE.
  25  */
  26
  27 /*
  28  * TIFF Library.
  29  */
  30 #include "tiffiop.h"
  31
  32 int
  33 TIFFFlush(TIFF* tif)
  34 {
  35
  36         if (tif->tif_mode != O_RDONLY) {
  37                 if (!TIFFFlushData(tif))
  38                         return (0);
  39                 if ((tif->tif_flags & TIFF_DIRTYDIRECT) &&
  40                     !TIFFWriteDirectory(tif))
  41                         return (0);
  42         }
  43         return (1);
  44 }
  45
  46 /*
  47  * Flush buffered data to the file.
  48  *
  49  * Frank Warmerdam'2000: I modified this to return 1 if TIFF_BEENWRITING
  50  * is not set, so that TIFFFlush() will proceed to write out the directory.
  51  * The documentation says returning 1 is an error indicator, but not having
  52  * been writing isn't exactly a an error.  Hopefully this doesn't cause
  53  * problems for other people.
  54  */
  55 int
  56 TIFFFlushData(TIFF* tif)
  57 {
  58         if ((tif->tif_flags & TIFF_BEENWRITING) == 0)
  59                 return (0);
  60         if (tif->tif_flags & TIFF_POSTENCODE) {
  61                 tif->tif_flags &= ~TIFF_POSTENCODE;
  62                 if (!(*tif->tif_postencode)(tif))
  63                         return (0);
  64         }
  65         return (TIFFFlushData1(tif));
  66 }
  67