| Bsoft 1.9 Bernard's software package

- Main Page
- Namespaces
- Classes
- Files

- File List
- File Members

tif_extension.c
Go to the documentation of this file.
1 /* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_extension.c,v 1.4.2.1 2010-06-08 18:50:42 bfriesen Exp $ */
2
3 /*
4 * Copyright (c) 1988-1997 Sam Leffler
5 * Copyright (c) 1991-1997 Silicon Graphics, Inc.
6 *
7 * Permission to use, copy, modify, distribute, and sell this software and
8 * its documentation for any purpose is hereby granted without fee, provided
9 * that (i) the above copyright notices and this permission notice appear in
10 * all copies of the software and related documentation, and (ii) the names of
11 * Sam Leffler and Silicon Graphics may not be used in any advertising or
12 * publicity relating to the software without the specific, prior written
13 * permission of Sam Leffler and Silicon Graphics.
14 *
15 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
17 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
18 *
19 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
20 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
21 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
22 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
23 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24 * OF THIS SOFTWARE.
25 */
26
27 /*
28 * TIFF Library.
29 *
30 * Various routines support external extension of the tag set, and other
31 * application extension capabilities.
32 */
33
34 #include "tiffiop.h"
35
36 int TIFFGetTagListCount( TIFF *tif )
37
38 {
39 TIFFDirectory* td = &tif->tif_dir;
40
41 return td->td_customValueCount;
42 }
43
44 ttag_t TIFFGetTagListEntry( TIFF *tif, int tag_index )
45
46 {
47 TIFFDirectory* td = &tif->tif_dir;
48
49 if( tag_index < 0 || tag_index >= td->td_customValueCount )
50 return (ttag_t) -1;
51 else
52 return td->td_customValues[tag_index].info->field_tag;
53 }
54
55 /*
56 ** This provides read/write access to the TIFFTagMethods within the TIFF
57 ** structure to application code without giving access to the private
58 ** TIFF structure.
59 */
60 TIFFTagMethods *TIFFAccessTagMethods( TIFF *tif )
61
62 {
63 return &(tif->tif_tagmethods);
64 }
65
66 void *TIFFGetClientInfo( TIFF *tif, const char *name )
67
68 {
69 TIFFClientInfoLink *link = tif->tif_clientinfo;
70
71 while( link != NULL && strcmp(link->name,name) != 0 )
72 link = link->next;
73
74 if( link != NULL )
75 return link->data;
76 else
77 return NULL;
78 }
79
80 void TIFFSetClientInfo( TIFF *tif, void *data, const char *name )
81
82 {
83 TIFFClientInfoLink *link = tif->tif_clientinfo;
84
85 /*
86 ** Do we have an existing link with this name? If so, just
87 ** set it.
88 */
89 while( link != NULL && strcmp(link->name,name) != 0 )
90 link = link->next;
91
92 if( link != NULL )
93 {
94 link->data = data;
95 return;
96 }
97
98 /*
99 ** Create a new link.
100 */
101
102 link = (TIFFClientInfoLink *) _TIFFmalloc(sizeof(TIFFClientInfoLink));
103 assert (link != NULL);
104 link->next = tif->tif_clientinfo;
105 link->name = (char *) _TIFFmalloc(strlen(name)+1);
106 assert (link->name != NULL);
107 strcpy(link->name, name);
108 link->data = data;
109
110 tif->tif_clientinfo = link;
111 }
112 /*
113 * Local Variables:
114 * mode: c
115 * c-basic-offset: 8
116 * fill-column: 78
117 * End:
118 */
ttag_t
uint32 ttag_t
Definition: tiffio.h:61
tiff::tif_tagmethods
TIFFTagMethods tif_tagmethods
Definition: tiffiop.h:197
client_info::data
void * data
Definition: tiffiop.h:83
tiff::tif_clientinfo
TIFFClientInfoLink * tif_clientinfo
Definition: tiffiop.h:198
TIFFDirectory::td_customValues
TIFFTagValue * td_customValues
Definition: tif_dir.h:85
client_info
Definition: tiffiop.h:81
tiffiop.h
tiff
Definition: tiffiop.h:102
client_info::name
char * name
Definition: tiffiop.h:84
TIFFDirectory::td_customValueCount
int td_customValueCount
Definition: tif_dir.h:84
_TIFFTagValue::info
const TIFFFieldInfo * info
Definition: tiffio.h:315
TIFFTagMethods
Definition: tiffio.h:331
TIFFAccessTagMethods
TIFFTagMethods * TIFFAccessTagMethods(TIFF *tif)
Definition: tif_extension.c:60
TIFFSetClientInfo
void TIFFSetClientInfo(TIFF *tif, void *data, const char *name)
Definition: tif_extension.c:80
client_info::next
struct client_info * next
Definition: tiffiop.h:82
TIFFDirectory
Definition: tif_dir.h:36
TIFFGetTagListEntry
ttag_t TIFFGetTagListEntry(TIFF *tif, int tag_index)
Definition: tif_extension.c:44
TIFFGetTagListCount
int TIFFGetTagListCount(TIFF *tif)
Definition: tif_extension.c:36
tiff::tif_dir
TIFFDirectory tif_dir
Definition: tiffiop.h:133
TIFFFieldInfo::field_tag
ttag_t field_tag
Definition: tiffio.h:304
_TIFFmalloc
void * _TIFFmalloc(tsize_t s)
Definition: tif_acorn.c:461
data
JSAMPIMAGE data
Definition: jpeglib.h:945
TIFFGetClientInfo
void * TIFFGetClientInfo(TIFF *tif, const char *name)
Definition: tif_extension.c:66