1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/*
* 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)
{
TIFFErrorExtR(tif, tif->tif_name, "File opened in read-only mode");
return 0;
}
if (tif->tif_diroff == 0)
{
TIFFErrorExtR(tif, module, "Directory has not yet been written");
return 0;
}
if ((tif->tif_flags & TIFF_DIRTYDIRECT) != 0)
{
TIFFErrorExtR(tif, 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))
{
TIFFErrorExtR(tif, 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));
}
|
