1 files changed, 118 insertions, 0 deletions
diff --git a/tiff/libtiff/tif_flush.c b/tiff/libtiff/tif_flush.c
new file mode 100755
index 0000000..fd14e4c
--- /dev/null
+++ b/tiff/libtiff/tif_flush.c
@@ -0,0 +1,118 @@
+/* $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:
+ */