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Diffstat (limited to 'third_party/libtiff/tif_flush.c')
-rw-r--r--third_party/libtiff/tif_flush.c118
1 files changed, 118 insertions, 0 deletions
diff --git a/third_party/libtiff/tif_flush.c b/third_party/libtiff/tif_flush.c
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+++ b/third_party/libtiff/tif_flush.c
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+/* $Id: tif_flush.c,v 1.9 2010-03-31 06:40:10 fwarmerdam Exp $ */
+
+/*
+ * Copyright (c) 1988-1997 Sam Leffler
+ * Copyright (c) 1991-1997 Silicon Graphics, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that (i) the above copyright notices and this permission notice appear in
+ * all copies of the software and related documentation, and (ii) the names of
+ * Sam Leffler and Silicon Graphics may not be used in any advertising or
+ * publicity relating to the software without the specific, prior written
+ * permission of Sam Leffler and Silicon Graphics.
+ *
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
+ * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
+ * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
+ * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+/*
+ * TIFF Library.
+ */
+#include "tiffiop.h"
+
+int
+TIFFFlush(TIFF* tif)
+{
+ if( tif->tif_mode == O_RDONLY )
+ return 1;
+
+ if (!TIFFFlushData(tif))
+ return (0);
+
+ /* In update (r+) mode we try to detect the case where
+ only the strip/tile map has been altered, and we try to
+ rewrite only that portion of the directory without
+ making any other changes */
+
+ if( (tif->tif_flags & TIFF_DIRTYSTRIP)
+ && !(tif->tif_flags & TIFF_DIRTYDIRECT)
+ && tif->tif_mode == O_RDWR )
+ {
+ uint64 *offsets=NULL, *sizes=NULL;
+
+ if( TIFFIsTiled(tif) )
+ {
+ if( TIFFGetField( tif, TIFFTAG_TILEOFFSETS, &offsets )
+ && TIFFGetField( tif, TIFFTAG_TILEBYTECOUNTS, &sizes )
+ && _TIFFRewriteField( tif, TIFFTAG_TILEOFFSETS, TIFF_LONG8,
+ tif->tif_dir.td_nstrips, offsets )
+ && _TIFFRewriteField( tif, TIFFTAG_TILEBYTECOUNTS, TIFF_LONG8,
+ tif->tif_dir.td_nstrips, sizes ) )
+ {
+ tif->tif_flags &= ~TIFF_DIRTYSTRIP;
+ tif->tif_flags &= ~TIFF_BEENWRITING;
+ return 1;
+ }
+ }
+ else
+ {
+ if( TIFFGetField( tif, TIFFTAG_STRIPOFFSETS, &offsets )
+ && TIFFGetField( tif, TIFFTAG_STRIPBYTECOUNTS, &sizes )
+ && _TIFFRewriteField( tif, TIFFTAG_STRIPOFFSETS, TIFF_LONG8,
+ tif->tif_dir.td_nstrips, offsets )
+ && _TIFFRewriteField( tif, TIFFTAG_STRIPBYTECOUNTS, TIFF_LONG8,
+ tif->tif_dir.td_nstrips, sizes ) )
+ {
+ tif->tif_flags &= ~TIFF_DIRTYSTRIP;
+ tif->tif_flags &= ~TIFF_BEENWRITING;
+ return 1;
+ }
+ }
+ }
+
+ if ((tif->tif_flags & (TIFF_DIRTYDIRECT|TIFF_DIRTYSTRIP))
+ && !TIFFRewriteDirectory(tif))
+ return (0);
+
+ return (1);
+}
+
+/*
+ * Flush buffered data to the file.
+ *
+ * Frank Warmerdam'2000: I modified this to return 1 if TIFF_BEENWRITING
+ * is not set, so that TIFFFlush() will proceed to write out the directory.
+ * The documentation says returning 1 is an error indicator, but not having
+ * been writing isn't exactly a an error. Hopefully this doesn't cause
+ * problems for other people.
+ */
+int
+TIFFFlushData(TIFF* tif)
+{
+ if ((tif->tif_flags & TIFF_BEENWRITING) == 0)
+ return (1);
+ if (tif->tif_flags & TIFF_POSTENCODE) {
+ tif->tif_flags &= ~TIFF_POSTENCODE;
+ if (!(*tif->tif_postencode)(tif))
+ return (0);
+ }
+ return (TIFFFlushData1(tif));
+}
+
+/* vim: set ts=8 sts=8 sw=8 noet: */
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 8
+ * fill-column: 78
+ * End:
+ */