1 : /******************************************************************************
2 : * $Id: tifvsi.cpp 22639 2011-07-03 15:51:39Z rouault $
3 : *
4 : * Project: GeoTIFF Driver
5 : * Purpose: Implement system hook functions for libtiff on top of CPL/VSI,
6 : * including > 2GB support. Based on tif_unix.c from libtiff
7 : * distribution.
8 : * Author: Frank Warmerdam, warmerdam@pobox.com
9 : *
10 : ******************************************************************************
11 : * Copyright (c) 2005, Frank Warmerdam, warmerdam@pobox.com
12 : *
13 : * Permission is hereby granted, free of charge, to any person obtaining a
14 : * copy of this software and associated documentation files (the "Software"),
15 : * to deal in the Software without restriction, including without limitation
16 : * the rights to use, copy, modify, merge, publish, distribute, sublicense,
17 : * and/or sell copies of the Software, and to permit persons to whom the
18 : * Software is furnished to do so, subject to the following conditions:
19 : *
20 : * The above copyright notice and this permission notice shall be included
21 : * in all copies or substantial portions of the Software.
22 : *
23 : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
24 : * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
25 : * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
26 : * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
27 : * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
28 : * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
29 : * DEALINGS IN THE SOFTWARE.
30 : ****************************************************************************/
31 :
32 : /*
33 : * TIFF Library UNIX-specific Routines.
34 : */
35 : #include "cpl_vsi.h"
36 : #include "tifvsi.h"
37 :
38 : // We avoid including xtiffio.h since it drags in the libgeotiff version
39 : // of the VSI functions.
40 :
41 : #ifdef RENAME_INTERNAL_LIBGEOTIFF_SYMBOLS
42 : #include "gdal_libgeotiff_symbol_rename.h"
43 : #endif
44 :
45 : CPL_C_START
46 : extern TIFF CPL_DLL * XTIFFClientOpen(const char* name, const char* mode,
47 : thandle_t thehandle,
48 : TIFFReadWriteProc, TIFFReadWriteProc,
49 : TIFFSeekProc, TIFFCloseProc,
50 : TIFFSizeProc,
51 : TIFFMapFileProc, TIFFUnmapFileProc);
52 : CPL_C_END
53 :
54 : static tsize_t
55 181668 : _tiffReadProc(thandle_t fd, tdata_t buf, tsize_t size)
56 : {
57 181668 : return VSIFReadL( buf, 1, size, (VSILFILE *) fd );
58 : }
59 :
60 : static tsize_t
61 236876 : _tiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size)
62 : {
63 236876 : return VSIFWriteL( buf, 1, size, (VSILFILE *) fd );
64 : }
65 :
66 : static toff_t
67 341556 : _tiffSeekProc(thandle_t fd, toff_t off, int whence)
68 : {
69 341556 : if( VSIFSeekL( (VSILFILE *) fd, off, whence ) == 0 )
70 341556 : return (toff_t) VSIFTellL( (VSILFILE *) fd );
71 : else
72 0 : return (toff_t) -1;
73 : }
74 :
75 : static int
76 10230 : _tiffCloseProc(thandle_t fd)
77 : {
78 10230 : return VSIFCloseL( (VSILFILE *) fd );
79 : }
80 :
81 : static toff_t
82 13754 : _tiffSizeProc(thandle_t fd)
83 : {
84 : vsi_l_offset old_off;
85 : toff_t file_size;
86 :
87 13754 : old_off = VSIFTellL( (VSILFILE *) fd );
88 13754 : VSIFSeekL( (VSILFILE *) fd, 0, SEEK_END );
89 :
90 13754 : file_size = (toff_t) VSIFTellL( (VSILFILE *) fd );
91 13754 : VSIFSeekL( (VSILFILE *) fd, old_off, SEEK_SET );
92 :
93 13754 : return file_size;
94 : }
95 :
96 : static int
97 6808 : _tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
98 : {
99 : (void) fd; (void) pbase; (void) psize;
100 6808 : return (0);
101 : }
102 :
103 : static void
104 0 : _tiffUnmapProc(thandle_t fd, tdata_t base, toff_t size)
105 : {
106 : (void) fd; (void) base; (void) size;
107 0 : }
108 :
109 : /*
110 : * Open a TIFF file for read/writing.
111 : */
112 10236 : TIFF* VSI_TIFFOpen(const char* name, const char* mode)
113 : {
114 : static const char module[] = "TIFFOpen";
115 : int i, a_out;
116 : char access[32];
117 : VSILFILE *fp;
118 : TIFF *tif;
119 :
120 10236 : a_out = 0;
121 10236 : access[0] = '\0';
122 23934 : for( i = 0; mode[i] != '\0'; i++ )
123 : {
124 23264 : if( mode[i] == 'r'
125 6004 : || mode[i] == 'w'
126 3462 : || mode[i] == '+'
127 100 : || mode[i] == 'a' )
128 : {
129 13598 : access[a_out++] = mode[i];
130 13598 : access[a_out] = '\0';
131 : }
132 : }
133 :
134 10236 : strcat( access, "b" );
135 :
136 10236 : fp = VSIFOpenL( name, access );
137 10236 : if (fp == NULL) {
138 6 : if( errno >= 0 )
139 6 : TIFFError(module,"%s: %s", name, VSIStrerror( errno ) );
140 : else
141 0 : TIFFError(module, "%s: Cannot open", name);
142 6 : return ((TIFF *)0);
143 : }
144 :
145 : tif = XTIFFClientOpen(name, mode,
146 : (thandle_t) fp,
147 : _tiffReadProc, _tiffWriteProc,
148 : _tiffSeekProc, _tiffCloseProc, _tiffSizeProc,
149 10230 : _tiffMapProc, _tiffUnmapProc);
150 :
151 10230 : if( tif == NULL )
152 0 : VSIFCloseL( fp );
153 :
154 10230 : return tif;
155 : }
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