/src/freeimage-svn/FreeImage/trunk/Source/LibTIFF4/tif_extension.c
Line | Count | Source |
1 | | /* |
2 | | * Copyright (c) 1988-1997 Sam Leffler |
3 | | * Copyright (c) 1991-1997 Silicon Graphics, Inc. |
4 | | * |
5 | | * Permission to use, copy, modify, distribute, and sell this software and |
6 | | * its documentation for any purpose is hereby granted without fee, provided |
7 | | * that (i) the above copyright notices and this permission notice appear in |
8 | | * all copies of the software and related documentation, and (ii) the names of |
9 | | * Sam Leffler and Silicon Graphics may not be used in any advertising or |
10 | | * publicity relating to the software without the specific, prior written |
11 | | * permission of Sam Leffler and Silicon Graphics. |
12 | | * |
13 | | * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, |
14 | | * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY |
15 | | * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. |
16 | | * |
17 | | * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR |
18 | | * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, |
19 | | * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
20 | | * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF |
21 | | * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
22 | | * OF THIS SOFTWARE. |
23 | | */ |
24 | | |
25 | | /* |
26 | | * TIFF Library. |
27 | | * |
28 | | * Various routines support external extension of the tag set, and other |
29 | | * application extension capabilities. |
30 | | */ |
31 | | |
32 | | #include "tiffiop.h" |
33 | | |
34 | | int TIFFGetTagListCount(TIFF *tif) |
35 | | |
36 | 0 | { |
37 | 0 | TIFFDirectory *td = &tif->tif_dir; |
38 | |
|
39 | 0 | return td->td_customValueCount; |
40 | 0 | } |
41 | | |
42 | | uint32_t TIFFGetTagListEntry(TIFF *tif, int tag_index) |
43 | | |
44 | 0 | { |
45 | 0 | TIFFDirectory *td = &tif->tif_dir; |
46 | |
|
47 | 0 | if (tag_index < 0 || tag_index >= td->td_customValueCount) |
48 | 0 | return (uint32_t)(-1); |
49 | 0 | else |
50 | 0 | return td->td_customValues[tag_index].info->field_tag; |
51 | 0 | } |
52 | | |
53 | | /* |
54 | | ** This provides read/write access to the TIFFTagMethods within the TIFF |
55 | | ** structure to application code without giving access to the private |
56 | | ** TIFF structure. |
57 | | */ |
58 | | TIFFTagMethods *TIFFAccessTagMethods(TIFF *tif) |
59 | | |
60 | 0 | { |
61 | 0 | return &(tif->tif_tagmethods); |
62 | 0 | } |
63 | | |
64 | | void *TIFFGetClientInfo(TIFF *tif, const char *name) |
65 | | |
66 | 0 | { |
67 | 0 | TIFFClientInfoLink *psLink = tif->tif_clientinfo; |
68 | |
|
69 | 0 | while (psLink != NULL && strcmp(psLink->name, name) != 0) |
70 | 0 | psLink = psLink->next; |
71 | |
|
72 | 0 | if (psLink != NULL) |
73 | 0 | return psLink->data; |
74 | 0 | else |
75 | 0 | return NULL; |
76 | 0 | } |
77 | | |
78 | | void TIFFSetClientInfo(TIFF *tif, void *data, const char *name) |
79 | | |
80 | 0 | { |
81 | 0 | TIFFClientInfoLink *psLink = tif->tif_clientinfo; |
82 | | |
83 | | /* |
84 | | ** Do we have an existing link with this name? If so, just |
85 | | ** set it. |
86 | | */ |
87 | 0 | while (psLink != NULL && strcmp(psLink->name, name) != 0) |
88 | 0 | psLink = psLink->next; |
89 | |
|
90 | 0 | if (psLink != NULL) |
91 | 0 | { |
92 | 0 | psLink->data = data; |
93 | 0 | return; |
94 | 0 | } |
95 | | |
96 | | /* |
97 | | ** Create a new link. |
98 | | */ |
99 | | |
100 | 0 | psLink = |
101 | 0 | (TIFFClientInfoLink *)_TIFFmallocExt(tif, sizeof(TIFFClientInfoLink)); |
102 | 0 | assert(psLink != NULL); |
103 | 0 | psLink->next = tif->tif_clientinfo; |
104 | 0 | psLink->name = (char *)_TIFFmallocExt(tif, (tmsize_t)(strlen(name) + 1)); |
105 | 0 | assert(psLink->name != NULL); |
106 | 0 | strcpy(psLink->name, name); |
107 | 0 | psLink->data = data; |
108 | |
|
109 | 0 | tif->tif_clientinfo = psLink; |
110 | 0 | } |