src/tiff/libtiff/tif_flush.c


/*
 * 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:
 */
Commit	Line	Data
	1
	2	/*
	3	* Copyright (c) 1988-1997 Sam Leffler
	4	* Copyright (c) 1991-1997 Silicon Graphics, Inc.
	5	*
	6	* Permission to use, copy, modify, distribute, and sell this software and
	7	* its documentation for any purpose is hereby granted without fee, provided
	8	* that (i) the above copyright notices and this permission notice appear in
	9	* all copies of the software and related documentation, and (ii) the names of
	10	* Sam Leffler and Silicon Graphics may not be used in any advertising or
	11	* publicity relating to the software without the specific, prior written
	12	* permission of Sam Leffler and Silicon Graphics.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
	15	* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
	16	* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
	17	*
	18	* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
	19	* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
	20	* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
	21	* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
	22	* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
	23	* OF THIS SOFTWARE.
	24	*/
	25
	26	/*
	27	* TIFF Library.
	28	*/
	29	#include "tiffiop.h"
	30
	31	int
	32	TIFFFlush(TIFF* tif)
	33	{
	34	if( tif->tif_mode == O_RDONLY )
	35	return 1;
	36
	37	if (!TIFFFlushData(tif))
	38	return (0);
	39
	40	/* In update (r+) mode we try to detect the case where
	41	only the strip/tile map has been altered, and we try to
	42	rewrite only that portion of the directory without
	43	making any other changes */
	44
	45	if( (tif->tif_flags & TIFF_DIRTYSTRIP)
	46	&& !(tif->tif_flags & TIFF_DIRTYDIRECT)
	47	&& tif->tif_mode == O_RDWR )
	48	{
	49	uint64 offsets=NULL, sizes=NULL;
	50
	51	if( TIFFIsTiled(tif) )
	52	{
	53	if( TIFFGetField( tif, TIFFTAG_TILEOFFSETS, &offsets )
	54	&& TIFFGetField( tif, TIFFTAG_TILEBYTECOUNTS, &sizes )
	55	&& _TIFFRewriteField( tif, TIFFTAG_TILEOFFSETS, TIFF_LONG8,
	56	tif->tif_dir.td_nstrips, offsets )
	57	&& _TIFFRewriteField( tif, TIFFTAG_TILEBYTECOUNTS, TIFF_LONG8,
	58	tif->tif_dir.td_nstrips, sizes ) )
	59	{
	60	tif->tif_flags &= ~TIFF_DIRTYSTRIP;
	61	tif->tif_flags &= ~TIFF_BEENWRITING;
	62	return 1;
	63	}
	64	}
	65	else
	66	{
	67	if( TIFFGetField( tif, TIFFTAG_STRIPOFFSETS, &offsets )
	68	&& TIFFGetField( tif, TIFFTAG_STRIPBYTECOUNTS, &sizes )
	69	&& _TIFFRewriteField( tif, TIFFTAG_STRIPOFFSETS, TIFF_LONG8,
	70	tif->tif_dir.td_nstrips, offsets )
	71	&& _TIFFRewriteField( tif, TIFFTAG_STRIPBYTECOUNTS, TIFF_LONG8,
	72	tif->tif_dir.td_nstrips, sizes ) )
	73	{
	74	tif->tif_flags &= ~TIFF_DIRTYSTRIP;
	75	tif->tif_flags &= ~TIFF_BEENWRITING;
	76	return 1;
	77	}
	78	}
	79	}
	80
	81	if ((tif->tif_flags & (TIFF_DIRTYDIRECT\|TIFF_DIRTYSTRIP))
	82	&& !TIFFRewriteDirectory(tif))
	83	return (0);
	84
	85	return (1);
	86	}
	87
	88	/*
	89	* Flush buffered data to the file.
	90	*
	91	* Frank Warmerdam'2000: I modified this to return 1 if TIFF_BEENWRITING
	92	* is not set, so that TIFFFlush() will proceed to write out the directory.
	93	* The documentation says returning 1 is an error indicator, but not having
	94	* been writing isn't exactly a an error. Hopefully this doesn't cause
	95	* problems for other people.
	96	*/
	97	int
	98	TIFFFlushData(TIFF* tif)
	99	{
	100	if ((tif->tif_flags & TIFF_BEENWRITING) == 0)
	101	return (1);
	102	if (tif->tif_flags & TIFF_POSTENCODE) {
	103	tif->tif_flags &= ~TIFF_POSTENCODE;
	104	if (!(*tif->tif_postencode)(tif))
	105	return (0);
	106	}
	107	return (TIFFFlushData1(tif));
	108	}
	109
	110	/* vim: set ts=8 sts=8 sw=8 noet: */
	111	/*
	112	* Local Variables:
	113	* mode: c
	114	* c-basic-offset: 8
	115	* fill-column: 78
	116	* End:
	117	*/