1 /* $Id: tif_unix.c,v 1.28 2017-01-11 19:02:49 erouault 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 UNIX-specific Routines. These are should also work with the
29 * Windows Common RunTime Library.
30 */
31
32 #include "tif_config.h"
33
34 #ifdef HAVE_SYS_TYPES_H
35 # include <sys/types.h>
36 #endif
37
38 #include <errno.h>
39
40 #include <stdarg.h>
41 #include <stdlib.h>
42 #include <sys/stat.h>
43
44 #ifdef HAVE_UNISTD_H
45 # include <unistd.h>
46 #endif
47
48 #ifdef HAVE_FCNTL_H
49 # include <fcntl.h>
50 #endif
51
52 #ifdef HAVE_IO_H
53 # include <io.h>
54 #endif
55
56 #include "tiffiop.h"
57
58
59 #define TIFF_IO_MAX 2147483647U
60
61
62 typedef union fd_as_handle_union
63 {
64 int fd;
65 thandle_t h;
66 } fd_as_handle_union_t;
67
68 static tmsize_t
_tiffReadProc(thandle_t fd,void * buf,tmsize_t size)69 _tiffReadProc(thandle_t fd, void* buf, tmsize_t size)
70 {
71 fd_as_handle_union_t fdh;
72 const size_t bytes_total = (size_t) size;
73 size_t bytes_read;
74 tmsize_t count = -1;
75 if ((tmsize_t) bytes_total != size)
76 {
77 errno=EINVAL;
78 return (tmsize_t) -1;
79 }
80 fdh.h = fd;
81 for (bytes_read=0; bytes_read < bytes_total; bytes_read+=count)
82 {
83 char *buf_offset = (char *) buf+bytes_read;
84 size_t io_size = bytes_total-bytes_read;
85 if (io_size > TIFF_IO_MAX)
86 io_size = TIFF_IO_MAX;
87 count=read(fdh.fd, buf_offset, (TIFFIOSize_t) io_size);
88 if (count <= 0)
89 break;
90 }
91 if (count < 0)
92 return (tmsize_t)-1;
93 return (tmsize_t) bytes_read;
94 }
95
96 static tmsize_t
_tiffWriteProc(thandle_t fd,void * buf,tmsize_t size)97 _tiffWriteProc(thandle_t fd, void* buf, tmsize_t size)
98 {
99 fd_as_handle_union_t fdh;
100 const size_t bytes_total = (size_t) size;
101 size_t bytes_written;
102 tmsize_t count = -1;
103 if ((tmsize_t) bytes_total != size)
104 {
105 errno=EINVAL;
106 return (tmsize_t) -1;
107 }
108 fdh.h = fd;
109 for (bytes_written=0; bytes_written < bytes_total; bytes_written+=count)
110 {
111 const char *buf_offset = (char *) buf+bytes_written;
112 size_t io_size = bytes_total-bytes_written;
113 if (io_size > TIFF_IO_MAX)
114 io_size = TIFF_IO_MAX;
115 count=write(fdh.fd, buf_offset, (TIFFIOSize_t) io_size);
116 if (count <= 0)
117 break;
118 }
119 if (count < 0)
120 return (tmsize_t)-1;
121 return (tmsize_t) bytes_written;
122 /* return ((tmsize_t) write(fdh.fd, buf, bytes_total)); */
123 }
124
125 static uint64
_tiffSeekProc(thandle_t fd,uint64 off,int whence)126 _tiffSeekProc(thandle_t fd, uint64 off, int whence)
127 {
128 fd_as_handle_union_t fdh;
129 _TIFF_off_t off_io = (_TIFF_off_t) off;
130 if ((uint64) off_io != off)
131 {
132 errno=EINVAL;
133 return (uint64) -1; /* this is really gross */
134 }
135 fdh.h = fd;
136 return((uint64)_TIFF_lseek_f(fdh.fd,off_io,whence));
137 }
138
139 static int
_tiffCloseProc(thandle_t fd)140 _tiffCloseProc(thandle_t fd)
141 {
142 fd_as_handle_union_t fdh;
143 fdh.h = fd;
144 return(close(fdh.fd));
145 }
146
147 static uint64
_tiffSizeProc(thandle_t fd)148 _tiffSizeProc(thandle_t fd)
149 {
150 _TIFF_stat_s sb;
151 fd_as_handle_union_t fdh;
152 fdh.h = fd;
153 if (_TIFF_fstat_f(fdh.fd,&sb)<0)
154 return(0);
155 else
156 return((uint64)sb.st_size);
157 }
158
159 #ifdef HAVE_MMAP
160 #include <sys/mman.h>
161
162 static int
_tiffMapProc(thandle_t fd,void ** pbase,toff_t * psize)163 _tiffMapProc(thandle_t fd, void** pbase, toff_t* psize)
164 {
165 uint64 size64 = _tiffSizeProc(fd);
166 tmsize_t sizem = (tmsize_t)size64;
167 if ((uint64)sizem==size64) {
168 fd_as_handle_union_t fdh;
169 fdh.h = fd;
170 *pbase = (void*)
171 mmap(0, (size_t)sizem, PROT_READ, MAP_SHARED, fdh.fd, 0);
172 if (*pbase != (void*) -1) {
173 *psize = (tmsize_t)sizem;
174 return (1);
175 }
176 }
177 return (0);
178 }
179
180 static void
_tiffUnmapProc(thandle_t fd,void * base,toff_t size)181 _tiffUnmapProc(thandle_t fd, void* base, toff_t size)
182 {
183 (void) fd;
184 (void) munmap(base, (off_t) size);
185 }
186 #else /* !HAVE_MMAP */
187 static int
_tiffMapProc(thandle_t fd,void ** pbase,toff_t * psize)188 _tiffMapProc(thandle_t fd, void** pbase, toff_t* psize)
189 {
190 (void) fd; (void) pbase; (void) psize;
191 return (0);
192 }
193
194 static void
_tiffUnmapProc(thandle_t fd,void * base,toff_t size)195 _tiffUnmapProc(thandle_t fd, void* base, toff_t size)
196 {
197 (void) fd; (void) base; (void) size;
198 }
199 #endif /* !HAVE_MMAP */
200
201 /*
202 * Open a TIFF file descriptor for read/writing.
203 */
204 TIFF*
TIFFFdOpen(int fd,const char * name,const char * mode)205 TIFFFdOpen(int fd, const char* name, const char* mode)
206 {
207 TIFF* tif;
208
209 fd_as_handle_union_t fdh;
210 fdh.fd = fd;
211 tif = TIFFClientOpen(name, mode,
212 fdh.h,
213 _tiffReadProc, _tiffWriteProc,
214 _tiffSeekProc, _tiffCloseProc, _tiffSizeProc,
215 _tiffMapProc, _tiffUnmapProc);
216 if (tif)
217 tif->tif_fd = fd;
218 return (tif);
219 }
220
221 /*
222 * Open a TIFF file for read/writing.
223 */
224 TIFF*
TIFFOpen(const char * name,const char * mode)225 TIFFOpen(const char* name, const char* mode)
226 {
227 static const char module[] = "TIFFOpen";
228 int m, fd;
229 TIFF* tif;
230
231 m = _TIFFgetMode(mode, module);
232 if (m == -1)
233 return ((TIFF*)0);
234
235 /* for cygwin and mingw */
236 #ifdef O_BINARY
237 m |= O_BINARY;
238 #endif
239
240 fd = open(name, m, 0666);
241 if (fd < 0) {
242 if (errno > 0 && strerror(errno) != NULL ) {
243 TIFFErrorExt(0, module, "%s: %s", name, strerror(errno) );
244 } else {
245 TIFFErrorExt(0, module, "%s: Cannot open", name);
246 }
247 return ((TIFF *)0);
248 }
249
250 tif = TIFFFdOpen((int)fd, name, mode);
251 if(!tif)
252 close(fd);
253 return tif;
254 }
255
256 #ifdef __WIN32__
257 #include <windows.h>
258 /*
259 * Open a TIFF file with a Unicode filename, for read/writing.
260 */
261 TIFF*
TIFFOpenW(const wchar_t * name,const char * mode)262 TIFFOpenW(const wchar_t* name, const char* mode)
263 {
264 static const char module[] = "TIFFOpenW";
265 int m, fd;
266 int mbsize;
267 char *mbname;
268 TIFF* tif;
269
270 m = _TIFFgetMode(mode, module);
271 if (m == -1)
272 return ((TIFF*)0);
273
274 /* for cygwin and mingw */
275 #ifdef O_BINARY
276 m |= O_BINARY;
277 #endif
278
279 fd = _wopen(name, m, 0666);
280 if (fd < 0) {
281 TIFFErrorExt(0, module, "%ls: Cannot open", name);
282 return ((TIFF *)0);
283 }
284
285 mbname = NULL;
286 mbsize = WideCharToMultiByte(CP_ACP, 0, name, -1, NULL, 0, NULL, NULL);
287 if (mbsize > 0) {
288 mbname = _TIFFmalloc(mbsize);
289 if (!mbname) {
290 TIFFErrorExt(0, module,
291 "Can't allocate space for filename conversion buffer");
292 return ((TIFF*)0);
293 }
294
295 WideCharToMultiByte(CP_ACP, 0, name, -1, mbname, mbsize,
296 NULL, NULL);
297 }
298
299 tif = TIFFFdOpen((int)fd, (mbname != NULL) ? mbname : "<unknown>",
300 mode);
301
302 _TIFFfree(mbname);
303
304 if(!tif)
305 close(fd);
306 return tif;
307 }
308 #endif
309
310 void*
_TIFFmalloc(tmsize_t s)311 _TIFFmalloc(tmsize_t s)
312 {
313 if (s == 0)
314 return ((void *) NULL);
315
316 return (malloc((size_t) s));
317 }
318
_TIFFcalloc(tmsize_t nmemb,tmsize_t siz)319 void* _TIFFcalloc(tmsize_t nmemb, tmsize_t siz)
320 {
321 if( nmemb == 0 || siz == 0 )
322 return ((void *) NULL);
323
324 return calloc((size_t) nmemb, (size_t)siz);
325 }
326
327 void
_TIFFfree(void * p)328 _TIFFfree(void* p)
329 {
330 free(p);
331 }
332
333 void*
_TIFFrealloc(void * p,tmsize_t s)334 _TIFFrealloc(void* p, tmsize_t s)
335 {
336 return (realloc(p, (size_t) s));
337 }
338
339 void
_TIFFmemset(void * p,int v,tmsize_t c)340 _TIFFmemset(void* p, int v, tmsize_t c)
341 {
342 memset(p, v, (size_t) c);
343 }
344
345 void
_TIFFmemcpy(void * d,const void * s,tmsize_t c)346 _TIFFmemcpy(void* d, const void* s, tmsize_t c)
347 {
348 memcpy(d, s, (size_t) c);
349 }
350
351 int
_TIFFmemcmp(const void * p1,const void * p2,tmsize_t c)352 _TIFFmemcmp(const void* p1, const void* p2, tmsize_t c)
353 {
354 return (memcmp(p1, p2, (size_t) c));
355 }
356
357 static void
unixWarningHandler(const char * module,const char * fmt,va_list ap)358 unixWarningHandler(const char* module, const char* fmt, va_list ap)
359 {
360 if (module != NULL)
361 fprintf(stderr, "%s: ", module);
362 fprintf(stderr, "Warning, ");
363 vfprintf(stderr, fmt, ap);
364 fprintf(stderr, ".\n");
365 }
366 TIFFErrorHandler _TIFFwarningHandler = unixWarningHandler;
367
368 static void
unixErrorHandler(const char * module,const char * fmt,va_list ap)369 unixErrorHandler(const char* module, const char* fmt, va_list ap)
370 {
371 if (module != NULL)
372 fprintf(stderr, "%s: ", module);
373 vfprintf(stderr, fmt, ap);
374 fprintf(stderr, ".\n");
375 }
376 TIFFErrorHandler _TIFFerrorHandler = unixErrorHandler;
377
378 /* vim: set ts=8 sts=8 sw=8 noet: */
379
380 /*
381 * Local Variables:
382 * mode: c
383 * c-basic-offset: 8
384 * fill-column: 78
385 * End:
386 */
387