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/*
* 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 )
{
if( TIFFForceStrileArrayWriting(tif) )
return 1;
}
if ((tif->tif_flags & (TIFF_DIRTYDIRECT|TIFF_DIRTYSTRIP))
&& !TIFFRewriteDirectory(tif))
return (0);
return (1);
}
/*
* This is an advanced writing function that must be used in a particular
* sequence, and together with TIFFDeferStrileArrayWriting(),
* to make its intended effect. Its aim is to force the writing of
* the [Strip/Tile][Offsets/ByteCounts] arrays at the end of the file, when
* they have not yet been rewritten.
*
* The typical sequence of calls is:
* TIFFOpen()
* [ TIFFCreateDirectory(tif) ]
* Set fields with calls to TIFFSetField(tif, ...)
* TIFFDeferStrileArrayWriting(tif)
* TIFFWriteCheck(tif, ...)
* TIFFWriteDirectory(tif)
* ... potentially create other directories and come back to the above directory
* TIFFForceStrileArrayWriting(tif)
*
* Returns 1 in case of success, 0 otherwise.
*/
int TIFFForceStrileArrayWriting(TIFF* tif)
{
static const char module[] = "TIFFForceStrileArrayWriting";
const int isTiled = TIFFIsTiled(tif);
if (tif->tif_mode == O_RDONLY)
{
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"File opened in read-only mode");
return 0;
}
if( tif->tif_diroff == 0 )
{
TIFFErrorExt(tif->tif_clientdata, module,
"Directory has not yet been written");
return 0;
}
if( (tif->tif_flags & TIFF_DIRTYDIRECT) != 0 )
{
TIFFErrorExt(tif->tif_clientdata, module,
"Directory has changes other than the strile arrays. "
"TIFFRewriteDirectory() should be called instead");
return 0;
}
if( !(tif->tif_flags & TIFF_DIRTYSTRIP) )
{
if( !(tif->tif_dir.td_stripoffset_entry.tdir_tag != 0 &&
tif->tif_dir.td_stripoffset_entry.tdir_count == 0 &&
tif->tif_dir.td_stripoffset_entry.tdir_type == 0 &&
tif->tif_dir.td_stripoffset_entry.tdir_offset.toff_long8 == 0 &&
tif->tif_dir.td_stripbytecount_entry.tdir_tag != 0 &&
tif->tif_dir.td_stripbytecount_entry.tdir_count == 0 &&
tif->tif_dir.td_stripbytecount_entry.tdir_type == 0 &&
tif->tif_dir.td_stripbytecount_entry.tdir_offset.toff_long8 == 0) )
{
TIFFErrorExt(tif->tif_clientdata, module,
"Function not called together with "
"TIFFDeferStrileArrayWriting()");
return 0;
}
if (tif->tif_dir.td_stripoffset_p == NULL && !TIFFSetupStrips(tif))
return 0;
}
if( _TIFFRewriteField( tif,
isTiled ? TIFFTAG_TILEOFFSETS :
TIFFTAG_STRIPOFFSETS,
TIFF_LONG8,
tif->tif_dir.td_nstrips,
tif->tif_dir.td_stripoffset_p )
&& _TIFFRewriteField( tif,
isTiled ? TIFFTAG_TILEBYTECOUNTS :
TIFFTAG_STRIPBYTECOUNTS,
TIFF_LONG8,
tif->tif_dir.td_nstrips,
tif->tif_dir.td_stripbytecount_p ) )
{
tif->tif_flags &= ~TIFF_DIRTYSTRIP;
tif->tif_flags &= ~TIFF_BEENWRITING;
return 1;
}
return 0;
}
/*
* 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:
*/
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