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 UNIX-specific Routines. These are should also work with the
27 * Windows Common RunTime Library.
28 */
29
30 #include "tif_config.h"
31
32 #ifdef HAVE_SYS_TYPES_H
33 # include <sys/types.h>
34 #endif
35
36 #include <errno.h>
37
38 #include <stdarg.h>
39 #include <stdlib.h>
40 #include <sys/stat.h>
41
42 #ifdef HAVE_UNISTD_H
43 # include <unistd.h>
44 #endif
45
46 #ifdef HAVE_FCNTL_H
47 # include <fcntl.h>
48 #endif
49
50 #ifdef HAVE_IO_H
51 # include <io.h>
52 #endif
53
54 #include "tiffiop.h"
55
56
57 #define TIFF_IO_MAX 2147483647U
58
59
60 typedef union fd_as_handle_union
61 {
62 int fd;
63 thandle_t h;
64 } fd_as_handle_union_t;
65
66 static tmsize_t
_tiffReadProc(thandle_t fd,void * buf,tmsize_t size)67 _tiffReadProc(thandle_t fd, void* buf, tmsize_t size)
68 {
69 fd_as_handle_union_t fdh;
70 const size_t bytes_total = (size_t) size;
71 size_t bytes_read;
72 tmsize_t count = -1;
73 if ((tmsize_t) bytes_total != size)
74 {
75 errno=EINVAL;
76 return (tmsize_t) -1;
77 }
78 fdh.h = fd;
79 for (bytes_read=0; bytes_read < bytes_total; bytes_read+=count)
80 {
81 char *buf_offset = (char *) buf+bytes_read;
82 size_t io_size = bytes_total-bytes_read;
83 if (io_size > TIFF_IO_MAX)
84 io_size = TIFF_IO_MAX;
85 count=read(fdh.fd, buf_offset, (TIFFIOSize_t) io_size);
86 if (count <= 0)
87 break;
88 }
89 if (count < 0)
90 return (tmsize_t)-1;
91 return (tmsize_t) bytes_read;
92 }
93
94 static tmsize_t
_tiffWriteProc(thandle_t fd,void * buf,tmsize_t size)95 _tiffWriteProc(thandle_t fd, void* buf, tmsize_t size)
96 {
97 fd_as_handle_union_t fdh;
98 const size_t bytes_total = (size_t) size;
99 size_t bytes_written;
100 tmsize_t count = -1;
101 if ((tmsize_t) bytes_total != size)
102 {
103 errno=EINVAL;
104 return (tmsize_t) -1;
105 }
106 fdh.h = fd;
107 for (bytes_written=0; bytes_written < bytes_total; bytes_written+=count)
108 {
109 const char *buf_offset = (char *) buf+bytes_written;
110 size_t io_size = bytes_total-bytes_written;
111 if (io_size > TIFF_IO_MAX)
112 io_size = TIFF_IO_MAX;
113 count=write(fdh.fd, buf_offset, (TIFFIOSize_t) io_size);
114 if (count <= 0)
115 break;
116 }
117 if (count < 0)
118 return (tmsize_t)-1;
119 return (tmsize_t) bytes_written;
120 /* return ((tmsize_t) write(fdh.fd, buf, bytes_total)); */
121 }
122
123 static uint64
_tiffSeekProc(thandle_t fd,uint64 off,int whence)124 _tiffSeekProc(thandle_t fd, uint64 off, int whence)
125 {
126 fd_as_handle_union_t fdh;
127 _TIFF_off_t off_io = (_TIFF_off_t) off;
128 if ((uint64) off_io != off)
129 {
130 errno=EINVAL;
131 return (uint64) -1; /* this is really gross */
132 }
133 fdh.h = fd;
134 return((uint64)_TIFF_lseek_f(fdh.fd,off_io,whence));
135 }
136
137 static int
_tiffCloseProc(thandle_t fd)138 _tiffCloseProc(thandle_t fd)
139 {
140 fd_as_handle_union_t fdh;
141 fdh.h = fd;
142 return(close(fdh.fd));
143 }
144
145 static uint64
_tiffSizeProc(thandle_t fd)146 _tiffSizeProc(thandle_t fd)
147 {
148 _TIFF_stat_s sb;
149 fd_as_handle_union_t fdh;
150 fdh.h = fd;
151 if (_TIFF_fstat_f(fdh.fd,&sb)<0)
152 return(0);
153 else
154 return((uint64)sb.st_size);
155 }
156
157 #ifdef HAVE_MMAP
158 #include <sys/mman.h>
159
160 static int
_tiffMapProc(thandle_t fd,void ** pbase,toff_t * psize)161 _tiffMapProc(thandle_t fd, void** pbase, toff_t* psize)
162 {
163 uint64 size64 = _tiffSizeProc(fd);
164 tmsize_t sizem = (tmsize_t)size64;
165 if (size64 && (uint64)sizem==size64) {
166 fd_as_handle_union_t fdh;
167 fdh.h = fd;
168 *pbase = (void*)
169 mmap(0, (size_t)sizem, PROT_READ, MAP_SHARED, fdh.fd, 0);
170 if (*pbase != (void*) -1) {
171 *psize = (tmsize_t)sizem;
172 return (1);
173 }
174 }
175 return (0);
176 }
177
178 static void
_tiffUnmapProc(thandle_t fd,void * base,toff_t size)179 _tiffUnmapProc(thandle_t fd, void* base, toff_t size)
180 {
181 (void) fd;
182 (void) munmap(base, (off_t) size);
183 }
184 #else /* !HAVE_MMAP */
185 static int
_tiffMapProc(thandle_t fd,void ** pbase,toff_t * psize)186 _tiffMapProc(thandle_t fd, void** pbase, toff_t* psize)
187 {
188 (void) fd; (void) pbase; (void) psize;
189 return (0);
190 }
191
192 static void
_tiffUnmapProc(thandle_t fd,void * base,toff_t size)193 _tiffUnmapProc(thandle_t fd, void* base, toff_t size)
194 {
195 (void) fd; (void) base; (void) size;
196 }
197 #endif /* !HAVE_MMAP */
198
199 /*
200 * Open a TIFF file descriptor for read/writing.
201 */
202 TIFF*
TIFFFdOpen(int fd,const char * name,const char * mode)203 TIFFFdOpen(int fd, const char* name, const char* mode)
204 {
205 TIFF* tif;
206
207 fd_as_handle_union_t fdh;
208 fdh.fd = fd;
209 tif = TIFFClientOpen(name, mode,
210 fdh.h,
211 _tiffReadProc, _tiffWriteProc,
212 _tiffSeekProc, _tiffCloseProc, _tiffSizeProc,
213 _tiffMapProc, _tiffUnmapProc);
214 if (tif)
215 tif->tif_fd = fd;
216 return (tif);
217 }
218
219 /*
220 * Open a TIFF file for read/writing.
221 */
222 TIFF*
TIFFOpen(const char * name,const char * mode)223 TIFFOpen(const char* name, const char* mode)
224 {
225 static const char module[] = "TIFFOpen";
226 int m, fd;
227 TIFF* tif;
228
229 m = _TIFFgetMode(mode, module);
230 if (m == -1)
231 return ((TIFF*)0);
232
233 /* for cygwin and mingw */
234 #ifdef O_BINARY
235 m |= O_BINARY;
236 #endif
237
238 fd = open(name, m, 0666);
239 if (fd < 0) {
240 if (errno > 0 && strerror(errno) != NULL ) {
241 TIFFErrorExt(0, module, "%s: %s", name, strerror(errno) );
242 } else {
243 TIFFErrorExt(0, module, "%s: Cannot open", name);
244 }
245 return ((TIFF *)0);
246 }
247
248 tif = TIFFFdOpen((int)fd, name, mode);
249 if(!tif)
250 close(fd);
251 return tif;
252 }
253
254 #ifdef __WIN32__
255 #include <windows.h>
256 /*
257 * Open a TIFF file with a Unicode filename, for read/writing.
258 */
259 TIFF*
TIFFOpenW(const wchar_t * name,const char * mode)260 TIFFOpenW(const wchar_t* name, const char* mode)
261 {
262 static const char module[] = "TIFFOpenW";
263 int m, fd;
264 int mbsize;
265 char *mbname;
266 TIFF* tif;
267
268 m = _TIFFgetMode(mode, module);
269 if (m == -1)
270 return ((TIFF*)0);
271
272 /* for cygwin and mingw */
273 #ifdef O_BINARY
274 m |= O_BINARY;
275 #endif
276
277 fd = _wopen(name, m, 0666);
278 if (fd < 0) {
279 TIFFErrorExt(0, module, "%ls: Cannot open", name);
280 return ((TIFF *)0);
281 }
282
283 mbname = NULL;
284 mbsize = WideCharToMultiByte(CP_ACP, 0, name, -1, NULL, 0, NULL, NULL);
285 if (mbsize > 0) {
286 mbname = _TIFFmalloc(mbsize);
287 if (!mbname) {
288 TIFFErrorExt(0, module,
289 "Can't allocate space for filename conversion buffer");
290 return ((TIFF*)0);
291 }
292
293 WideCharToMultiByte(CP_ACP, 0, name, -1, mbname, mbsize,
294 NULL, NULL);
295 }
296
297 tif = TIFFFdOpen((int)fd, (mbname != NULL) ? mbname : "<unknown>",
298 mode);
299
300 _TIFFfree(mbname);
301
302 if(!tif)
303 close(fd);
304 return tif;
305 }
306 #endif
307
308 void*
_TIFFmalloc(tmsize_t s)309 _TIFFmalloc(tmsize_t s)
310 {
311 if (s == 0)
312 return ((void *) NULL);
313
314 return (malloc((size_t) s));
315 }
316
_TIFFcalloc(tmsize_t nmemb,tmsize_t siz)317 void* _TIFFcalloc(tmsize_t nmemb, tmsize_t siz)
318 {
319 if( nmemb == 0 || siz == 0 )
320 return ((void *) NULL);
321
322 return calloc((size_t) nmemb, (size_t)siz);
323 }
324
325 void
_TIFFfree(void * p)326 _TIFFfree(void* p)
327 {
328 free(p);
329 }
330
331 void*
_TIFFrealloc(void * p,tmsize_t s)332 _TIFFrealloc(void* p, tmsize_t s)
333 {
334 return (realloc(p, (size_t) s));
335 }
336
337 void
_TIFFmemset(void * p,int v,tmsize_t c)338 _TIFFmemset(void* p, int v, tmsize_t c)
339 {
340 memset(p, v, (size_t) c);
341 }
342
343 void
_TIFFmemcpy(void * d,const void * s,tmsize_t c)344 _TIFFmemcpy(void* d, const void* s, tmsize_t c)
345 {
346 memcpy(d, s, (size_t) c);
347 }
348
349 int
_TIFFmemcmp(const void * p1,const void * p2,tmsize_t c)350 _TIFFmemcmp(const void* p1, const void* p2, tmsize_t c)
351 {
352 return (memcmp(p1, p2, (size_t) c));
353 }
354
355 static void
unixWarningHandler(const char * module,const char * fmt,va_list ap)356 unixWarningHandler(const char* module, const char* fmt, va_list ap)
357 {
358 if (module != NULL)
359 fprintf(stderr, "%s: ", module);
360 fprintf(stderr, "Warning, ");
361 vfprintf(stderr, fmt, ap);
362 fprintf(stderr, ".\n");
363 }
364 TIFFErrorHandler _TIFFwarningHandler = unixWarningHandler;
365
366 static void
unixErrorHandler(const char * module,const char * fmt,va_list ap)367 unixErrorHandler(const char* module, const char* fmt, va_list ap)
368 {
369 if (module != NULL)
370 fprintf(stderr, "%s: ", module);
371 vfprintf(stderr, fmt, ap);
372 fprintf(stderr, ".\n");
373 }
374 TIFFErrorHandler _TIFFerrorHandler = unixErrorHandler;
375
376 /* vim: set ts=8 sts=8 sw=8 noet: */
377
378 /*
379 * Local Variables:
380 * mode: c
381 * c-basic-offset: 8
382 * fill-column: 78
383 * End:
384 */
385