| 1 | /* $Header$ */ |
| 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 RISC OS specific Routines. |
| 29 | * Developed out of the Unix version. |
| 30 | * Peter Greenham, May 1995 |
| 31 | */ |
| 32 | #include "tiffiop.h" |
| 33 | #include <stdio.h> |
| 34 | #include <stdlib.h> |
| 35 | |
| 36 | /* |
| 37 | Low-level file handling |
| 38 | ~~~~~~~~~~~~~~~~~~~~~~~ |
| 39 | The functions in osfcn.h are unavailable when compiling under C, as it's a |
| 40 | C++ header. Therefore they have been implemented here. |
| 41 | |
| 42 | Now, why have I done it this way? |
| 43 | |
| 44 | The definitive API library for RISC OS is Jonathan Coxhead's OSLib, which |
| 45 | uses heavily optimised ARM assembler or even plain inline SWI calls for |
| 46 | maximum performance and minimum runtime size. However, I don't want to make |
| 47 | LIBTIFF need that to survive. Therefore I have also emulated the functions |
| 48 | using macros to _swi() and _swix() defined in the swis.h header, and |
| 49 | borrowing types from kernel.h, which is less efficient but doesn't need any |
| 50 | third-party libraries. |
| 51 | */ |
| 52 | |
| 53 | #ifdef INCLUDE_OSLIB |
| 54 | |
| 55 | #include "osfile.h" |
| 56 | #include "osgbpb.h" |
| 57 | #include "osargs.h" |
| 58 | #include "osfind.h" |
| 59 | |
| 60 | #else |
| 61 | |
| 62 | /* OSLIB EMULATION STARTS */ |
| 63 | |
| 64 | #include "kernel.h" |
| 65 | #include "swis.h" |
| 66 | |
| 67 | /* From oslib:types.h */ |
| 68 | typedef unsigned int bits; |
| 69 | typedef unsigned char byte; |
| 70 | #ifndef TRUE |
| 71 | #define TRUE 1 |
| 72 | #endif |
| 73 | #ifndef FALSE |
| 74 | #define FALSE 0 |
| 75 | #endif |
| 76 | #ifndef NULL |
| 77 | #define NULL 0 |
| 78 | #endif |
| 79 | #ifndef SKIP |
| 80 | #define SKIP 0 |
| 81 | #endif |
| 82 | |
| 83 | /* From oslib:os.h */ |
| 84 | typedef _kernel_oserror os_error; |
| 85 | typedef byte os_f; |
| 86 | |
| 87 | /* From oslib:osfile.h */ |
| 88 | #undef OS_File |
| 89 | #define OS_File 0x8 |
| 90 | |
| 91 | /* From oslib:osgbpb.h */ |
| 92 | #undef OS_GBPB |
| 93 | #define OS_GBPB 0xC |
| 94 | #undef OSGBPB_Write |
| 95 | #define OSGBPB_Write 0x2 |
| 96 | #undef OSGBPB_Read |
| 97 | #define OSGBPB_Read 0x4 |
| 98 | |
| 99 | extern os_error *xosgbpb_write (os_f file, |
| 100 | byte *data, |
| 101 | int size, |
| 102 | int *unwritten); |
| 103 | extern int osgbpb_write (os_f file, |
| 104 | byte *data, |
| 105 | int size); |
| 106 | |
| 107 | #define xosgbpb_write(file, data, size, unwritten) \ |
| 108 | (os_error*) _swix(OS_GBPB, _IN(0)|_IN(1)|_IN(2)|_IN(3)|_IN(4)|_OUT(3), \ |
| 109 | OSGBPB_WriteAt, \ |
| 110 | file, \ |
| 111 | data, \ |
| 112 | size, \ |
| 113 | unwritten) |
| 114 | |
| 115 | #define osgbpb_write(file, data, size) \ |
| 116 | _swi(OS_GBPB, _IN(0)|_IN(1)|_IN(2)|_IN(3)|_RETURN(3), \ |
| 117 | OSGBPB_Write, \ |
| 118 | file, \ |
| 119 | data, \ |
| 120 | size) |
| 121 | |
| 122 | extern os_error *xosgbpb_read (os_f file, |
| 123 | byte *buffer, |
| 124 | int size, |
| 125 | int *unread); |
| 126 | extern int osgbpb_read (os_f file, |
| 127 | byte *buffer, |
| 128 | int size); |
| 129 | |
| 130 | #define xosgbpb_read(file, buffer, size, unread) \ |
| 131 | (os_error*) _swix(OS_GBPB, _IN(0)|_IN(1)|_IN(2)|_IN(3)|_OUT(3), \ |
| 132 | OSGBPB_Read, \ |
| 133 | file, \ |
| 134 | buffer, \ |
| 135 | size, \ |
| 136 | unread) |
| 137 | |
| 138 | #define osgbpb_read(file, buffer, size) \ |
| 139 | _swi(OS_GBPB, _IN(0)|_IN(1)|_IN(2)|_IN(3)|_RETURN(3), \ |
| 140 | OSGBPB_Read, \ |
| 141 | file, \ |
| 142 | buffer, \ |
| 143 | size) |
| 144 | |
| 145 | /* From oslib:osfind.h */ |
| 146 | #undef OS_Find |
| 147 | #define OS_Find 0xD |
| 148 | #undef OSFind_Openin |
| 149 | #define OSFind_Openin 0x40 |
| 150 | #undef OSFind_Openout |
| 151 | #define OSFind_Openout 0x80 |
| 152 | #undef OSFind_Openup |
| 153 | #define OSFind_Openup 0xC0 |
| 154 | #undef OSFind_Close |
| 155 | #define OSFind_Close 0x0 |
| 156 | |
| 157 | #define xosfind_open(reason, file_name, path, file) \ |
| 158 | (os_error*) _swix(OS_Find, _IN(0)|_IN(1)|_IN(2)|_OUT(0), \ |
| 159 | reason, file_name, path, file) |
| 160 | |
| 161 | #define osfind_open(reason, file_name, path) \ |
| 162 | (os_f) _swi(OS_Find, _IN(0)|_IN(1)|_IN(2)|_RETURN(0), \ |
| 163 | reason, file_name, path) |
| 164 | |
| 165 | extern os_error *xosfind_openin (bits flags, |
| 166 | char *file_name, |
| 167 | char *path, |
| 168 | os_f *file); |
| 169 | extern os_f osfind_openin (bits flags, |
| 170 | char *file_name, |
| 171 | char *path); |
| 172 | |
| 173 | #define xosfind_openin(flags, file_name, path, file) \ |
| 174 | xosfind_open(flags | OSFind_Openin, file_name, path, file) |
| 175 | |
| 176 | #define osfind_openin(flags, file_name, path) \ |
| 177 | osfind_open(flags | OSFind_Openin, file_name, path) |
| 178 | |
| 179 | extern os_error *xosfind_openout (bits flags, |
| 180 | char *file_name, |
| 181 | char *path, |
| 182 | os_f *file); |
| 183 | extern os_f osfind_openout (bits flags, |
| 184 | char *file_name, |
| 185 | char *path); |
| 186 | |
| 187 | #define xosfind_openout(flags, file_name, path, file) \ |
| 188 | xosfind_open(flags | OSFind_Openout, file_name, path, file) |
| 189 | |
| 190 | #define osfind_openout(flags, file_name, path) \ |
| 191 | osfind_open(flags | OSFind_Openout, file_name, path) |
| 192 | |
| 193 | extern os_error *xosfind_openup (bits flags, |
| 194 | char *file_name, |
| 195 | char *path, |
| 196 | os_f *file); |
| 197 | extern os_f osfind_openup (bits flags, |
| 198 | char *file_name, |
| 199 | char *path); |
| 200 | |
| 201 | #define xosfind_openup(flags, file_name, path, file) \ |
| 202 | xosfind_open(flags | OSFind_Openup, file_name, path, file) |
| 203 | |
| 204 | #define osfind_openup(flags, file_name, path) \ |
| 205 | osfind_open(flags | OSFind_Openup, file_name, path) |
| 206 | |
| 207 | extern os_error *xosfind_close (os_f file); |
| 208 | extern void osfind_close (os_f file); |
| 209 | |
| 210 | #define xosfind_close(file) \ |
| 211 | (os_error*) _swix(OS_Find, _IN(0)|_IN(1), \ |
| 212 | OSFind_Close, \ |
| 213 | file) |
| 214 | |
| 215 | #define osfind_close(file) \ |
| 216 | (void) _swi(OS_Find, _IN(0)|_IN(1), \ |
| 217 | OSFind_Close, \ |
| 218 | file) |
| 219 | |
| 220 | /* From oslib:osargs.h */ |
| 221 | #undef OS_Args |
| 222 | #define OS_Args 0x9 |
| 223 | #undef OSArgs_ReadPtr |
| 224 | #define OSArgs_ReadPtr 0x0 |
| 225 | #undef OSArgs_SetPtr |
| 226 | #define OSArgs_SetPtr 0x1 |
| 227 | #undef OSArgs_ReadExt |
| 228 | #define OSArgs_ReadExt 0x2 |
| 229 | |
| 230 | extern os_error *xosargs_read_ptr (os_f file, |
| 231 | int *ptr); |
| 232 | extern int osargs_read_ptr (os_f file); |
| 233 | |
| 234 | #define xosargs_read_ptr(file, ptr) \ |
| 235 | (os_error*) _swix(OS_Args, _IN(0)|_IN(1)|_OUT(2), \ |
| 236 | OSArgs_ReadPtr, \ |
| 237 | file, \ |
| 238 | ptr) |
| 239 | |
| 240 | #define osargs_read_ptr(file) \ |
| 241 | _swi(OS_Args, _IN(0)|_IN(1)|_RETURN(2), \ |
| 242 | OSArgs_ReadPtr, \ |
| 243 | file) |
| 244 | |
| 245 | extern os_error *xosargs_set_ptr (os_f file, |
| 246 | int ptr); |
| 247 | extern void osargs_set_ptr (os_f file, |
| 248 | int ptr); |
| 249 | |
| 250 | #define xosargs_set_ptr(file, ptr) \ |
| 251 | (os_error*) _swix(OS_Args, _IN(0)|_IN(1)|_IN(2), \ |
| 252 | OSArgs_SetPtr, \ |
| 253 | file, \ |
| 254 | ptr) |
| 255 | |
| 256 | #define osargs_set_ptr(file, ptr) \ |
| 257 | (void) _swi(OS_Args, _IN(0)|_IN(1)|_IN(2), \ |
| 258 | OSArgs_SetPtr, \ |
| 259 | file, \ |
| 260 | ptr) |
| 261 | |
| 262 | extern os_error *xosargs_read_ext (os_f file, |
| 263 | int *ext); |
| 264 | extern int osargs_read_ext (os_f file); |
| 265 | |
| 266 | #define xosargs_read_ext(file, ext) \ |
| 267 | (os_error*) _swix(OS_Args, _IN(0)|_IN(1)|_OUT(2), \ |
| 268 | OSArgs_ReadExt, \ |
| 269 | file, \ |
| 270 | ext) |
| 271 | |
| 272 | #define osargs_read_ext(file) \ |
| 273 | _swi(OS_Args, _IN(0)|_IN(1)|_RETURN(2), \ |
| 274 | OSArgs_ReadExt, \ |
| 275 | file) |
| 276 | |
| 277 | /* OSLIB EMULATION ENDS */ |
| 278 | |
| 279 | #endif |
| 280 | |
| 281 | #ifndef __osfcn_h |
| 282 | /* Will be set or not during tiffcomp.h */ |
| 283 | /* You get this to compile under C++? Please say how! */ |
| 284 | |
| 285 | extern int open(const char* name, int flags, int mode) |
| 286 | { |
| 287 | /* From what I can tell, should return <0 for failure */ |
| 288 | os_error* e = (os_error*) 1; /* Cheeky way to use a pointer eh? :-) */ |
| 289 | os_f file = (os_f) -1; |
| 290 | |
| 291 | flags = flags; |
| 292 | |
| 293 | switch(mode) |
| 294 | { |
| 295 | case O_RDONLY: |
| 296 | { |
| 297 | e = xosfind_openin(SKIP, name, SKIP, &file); |
| 298 | break; |
| 299 | } |
| 300 | case O_WRONLY: |
| 301 | case O_RDWR|O_CREAT: |
| 302 | case O_RDWR|O_CREAT|O_TRUNC: |
| 303 | { |
| 304 | e = xosfind_openout(SKIP, name, SKIP, &file); |
| 305 | break; |
| 306 | } |
| 307 | case O_RDWR: |
| 308 | { |
| 309 | e = xosfind_openup(SKIP, name, SKIP, &file); |
| 310 | break; |
| 311 | } |
| 312 | } |
| 313 | if (e) |
| 314 | { |
| 315 | file = (os_f) -1; |
| 316 | } |
| 317 | return (file); |
| 318 | } |
| 319 | |
| 320 | extern int close(int fd) |
| 321 | { |
| 322 | return ((int) xosfind_close((os_f) fd)); |
| 323 | } |
| 324 | |
| 325 | extern int write(int fd, const char *buf, int nbytes) |
| 326 | { |
| 327 | /* Returns number of bytes written */ |
| 328 | return (nbytes - osgbpb_write((os_f) fd, (const byte*) buf, nbytes)); |
| 329 | } |
| 330 | |
| 331 | extern int read(int fd, char *buf, int nbytes) |
| 332 | { |
| 333 | /* Returns number of bytes read */ |
| 334 | return (nbytes - osgbpb_read((os_f) fd, (byte*) buf, nbytes)); |
| 335 | } |
| 336 | |
| 337 | extern off_t lseek(int fd, off_t offset, int whence) |
| 338 | { |
| 339 | int absolute = 0; |
| 340 | |
| 341 | switch (whence) |
| 342 | { |
| 343 | case SEEK_SET: |
| 344 | { |
| 345 | absolute = (int) offset; |
| 346 | break; |
| 347 | } |
| 348 | case SEEK_CUR: |
| 349 | { |
| 350 | absolute = osargs_read_ptr((os_f) fd) + (int) offset; |
| 351 | break; |
| 352 | } |
| 353 | case SEEK_END: |
| 354 | { |
| 355 | absolute = osargs_read_ext((os_f) fd) + (int) offset; |
| 356 | break; |
| 357 | } |
| 358 | } |
| 359 | |
| 360 | osargs_set_ptr((os_f) fd, absolute); |
| 361 | |
| 362 | return ((off_t) osargs_read_ptr((os_f) fd)); |
| 363 | } |
| 364 | #endif |
| 365 | |
| 366 | static tsize_t |
| 367 | _tiffReadProc(thandle_t fd, tdata_t buf, tsize_t size) |
| 368 | { |
| 369 | return ((tsize_t) read((int) fd, buf, (size_t) size)); |
| 370 | } |
| 371 | |
| 372 | static tsize_t |
| 373 | _tiffWriteProc(thandle_t fd, tdata_t buf, tsize_t size) |
| 374 | { |
| 375 | return ((tsize_t) write((int) fd, buf, (size_t) size)); |
| 376 | } |
| 377 | |
| 378 | static toff_t |
| 379 | _tiffSeekProc(thandle_t fd, toff_t off, int whence) |
| 380 | { |
| 381 | return ((toff_t) lseek((int) fd, (off_t) off, whence)); |
| 382 | } |
| 383 | |
| 384 | static int |
| 385 | _tiffCloseProc(thandle_t fd) |
| 386 | { |
| 387 | return (close((int) fd)); |
| 388 | } |
| 389 | |
| 390 | static toff_t |
| 391 | _tiffSizeProc(thandle_t fd) |
| 392 | { |
| 393 | return (lseek((int) fd, SEEK_END, SEEK_SET)); |
| 394 | } |
| 395 | |
| 396 | #ifdef HAVE_MMAP |
| 397 | #error "I didn't know Acorn had that!" |
| 398 | #endif |
| 399 | |
| 400 | /* !HAVE_MMAP */ |
| 401 | static int |
| 402 | _tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize) |
| 403 | { |
| 404 | (void) fd; (void) pbase; (void) psize; |
| 405 | return (0); |
| 406 | } |
| 407 | |
| 408 | static void |
| 409 | _tiffUnmapProc(thandle_t fd, tdata_t base, toff_t size) |
| 410 | { |
| 411 | (void) fd; (void) base; (void) size; |
| 412 | } |
| 413 | |
| 414 | /* |
| 415 | * Open a TIFF file descriptor for read/writing. |
| 416 | */ |
| 417 | TIFF* |
| 418 | TIFFFdOpen(int fd, const char* name, const char* mode) |
| 419 | { |
| 420 | TIFF* tif; |
| 421 | |
| 422 | tif = TIFFClientOpen(name, mode, |
| 423 | (thandle_t) fd, |
| 424 | _tiffReadProc, _tiffWriteProc, |
| 425 | _tiffSeekProc, _tiffCloseProc, _tiffSizeProc, |
| 426 | _tiffMapProc, _tiffUnmapProc); |
| 427 | if (tif) |
| 428 | { |
| 429 | tif->tif_fd = fd; |
| 430 | } |
| 431 | return (tif); |
| 432 | } |
| 433 | |
| 434 | /* |
| 435 | * Open a TIFF file for read/writing. |
| 436 | */ |
| 437 | TIFF* |
| 438 | TIFFOpen(const char* name, const char* mode) |
| 439 | { |
| 440 | static const char module[] = "TIFFOpen"; |
| 441 | int m, fd; |
| 442 | |
| 443 | m = _TIFFgetMode(mode, module); |
| 444 | |
| 445 | if (m == -1) |
| 446 | { |
| 447 | return ((TIFF*) 0); |
| 448 | } |
| 449 | |
| 450 | fd = open(name, 0, m); |
| 451 | |
| 452 | if (fd < 0) |
| 453 | { |
| 454 | TIFFError(module, "%s: Cannot open", name); |
| 455 | return ((TIFF *)0); |
| 456 | } |
| 457 | return (TIFFFdOpen(fd, name, mode)); |
| 458 | } |
| 459 | |
| 460 | void* |
| 461 | _TIFFmalloc(tsize_t s) |
| 462 | { |
| 463 | return (malloc((size_t) s)); |
| 464 | } |
| 465 | |
| 466 | void |
| 467 | _TIFFfree(tdata_t p) |
| 468 | { |
| 469 | free(p); |
| 470 | } |
| 471 | |
| 472 | void* |
| 473 | _TIFFrealloc(tdata_t p, tsize_t s) |
| 474 | { |
| 475 | return (realloc(p, (size_t) s)); |
| 476 | } |
| 477 | |
| 478 | void |
| 479 | _TIFFmemset(tdata_t p, int v, tsize_t c) |
| 480 | { |
| 481 | memset(p, v, (size_t) c); |
| 482 | } |
| 483 | |
| 484 | void |
| 485 | _TIFFmemcpy(tdata_t d, const tdata_t s, tsize_t c) |
| 486 | { |
| 487 | memcpy(d, s, (size_t) c); |
| 488 | } |
| 489 | |
| 490 | int |
| 491 | _TIFFmemcmp(const tdata_t p1, const tdata_t p2, tsize_t c) |
| 492 | { |
| 493 | return (memcmp(p1, p2, (size_t) c)); |
| 494 | } |
| 495 | |
| 496 | static void |
| 497 | acornWarningHandler(const char* module, const char* fmt, va_list ap) |
| 498 | { |
| 499 | if (module != NULL) |
| 500 | { |
| 501 | fprintf(stderr, "%s: ", module); |
| 502 | } |
| 503 | fprintf(stderr, "Warning, "); |
| 504 | vfprintf(stderr, fmt, ap); |
| 505 | fprintf(stderr, ".\n"); |
| 506 | } |
| 507 | TIFFErrorHandler _TIFFwarningHandler = acornWarningHandler; |
| 508 | |
| 509 | static void |
| 510 | acornErrorHandler(const char* module, const char* fmt, va_list ap) |
| 511 | { |
| 512 | if (module != NULL) |
| 513 | { |
| 514 | fprintf(stderr, "%s: ", module); |
| 515 | } |
| 516 | vfprintf(stderr, fmt, ap); |
| 517 | fprintf(stderr, ".\n"); |
| 518 | } |
| 519 | TIFFErrorHandler _TIFFerrorHandler = acornErrorHandler; |