1 /* 2 * cjpeg.c 3 * 4 * This file was part of the Independent JPEG Group's software: 5 * Copyright (C) 1991-1998, Thomas G. Lane. 6 * Modified 2003-2011 by Guido Vollbeding. 7 * libjpeg-turbo Modifications: 8 * Copyright (C) 2010, 2013, D. R. Commander. 9 * For conditions of distribution and use, see the accompanying README file. 10 * 11 * This file contains a command-line user interface for the JPEG compressor. 12 * It should work on any system with Unix- or MS-DOS-style command lines. 13 * 14 * Two different command line styles are permitted, depending on the 15 * compile-time switch TWO_FILE_COMMANDLINE: 16 * cjpeg [options] inputfile outputfile 17 * cjpeg [options] [inputfile] 18 * In the second style, output is always to standard output, which you'd 19 * normally redirect to a file or pipe to some other program. Input is 20 * either from a named file or from standard input (typically redirected). 21 * The second style is convenient on Unix but is unhelpful on systems that 22 * don't support pipes. Also, you MUST use the first style if your system 23 * doesn't do binary I/O to stdin/stdout. 24 * To simplify script writing, the "-outfile" switch is provided. The syntax 25 * cjpeg [options] -outfile outputfile inputfile 26 * works regardless of which command line style is used. 27 */ 28 29 #include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */ 30 #include "jversion.h" /* for version message */ 31 #include "config.h" 32 33 #ifdef USE_CCOMMAND /* command-line reader for Macintosh */ 34 #ifdef __MWERKS__ 35 #include <SIOUX.h> /* Metrowerks needs this */ 36 #include <console.h> /* ... and this */ 37 #endif 38 #ifdef THINK_C 39 #include <console.h> /* Think declares it here */ 40 #endif 41 #endif 42 43 44 /* Create the add-on message string table. */ 45 46 #define JMESSAGE(code,string) string , 47 48 static const char * const cdjpeg_message_table[] = { 49 #include "cderror.h" 50 NULL 51 }; 52 53 54 /* 55 * This routine determines what format the input file is, 56 * and selects the appropriate input-reading module. 57 * 58 * To determine which family of input formats the file belongs to, 59 * we may look only at the first byte of the file, since C does not 60 * guarantee that more than one character can be pushed back with ungetc. 61 * Looking at additional bytes would require one of these approaches: 62 * 1) assume we can fseek() the input file (fails for piped input); 63 * 2) assume we can push back more than one character (works in 64 * some C implementations, but unportable); 65 * 3) provide our own buffering (breaks input readers that want to use 66 * stdio directly, such as the RLE library); 67 * or 4) don't put back the data, and modify the input_init methods to assume 68 * they start reading after the start of file (also breaks RLE library). 69 * #1 is attractive for MS-DOS but is untenable on Unix. 70 * 71 * The most portable solution for file types that can't be identified by their 72 * first byte is to make the user tell us what they are. This is also the 73 * only approach for "raw" file types that contain only arbitrary values. 74 * We presently apply this method for Targa files. Most of the time Targa 75 * files start with 0x00, so we recognize that case. Potentially, however, 76 * a Targa file could start with any byte value (byte 0 is the length of the 77 * seldom-used ID field), so we provide a switch to force Targa input mode. 78 */ 79 80 static boolean is_targa; /* records user -targa switch */ 81 82 83 LOCAL(cjpeg_source_ptr) 84 select_file_type (j_compress_ptr cinfo, FILE * infile) 85 { 86 int c; 87 88 if (is_targa) { 89 #ifdef TARGA_SUPPORTED 90 return jinit_read_targa(cinfo); 91 #else 92 ERREXIT(cinfo, JERR_TGA_NOTCOMP); 93 #endif 94 } 95 96 if ((c = getc(infile)) == EOF) 97 ERREXIT(cinfo, JERR_INPUT_EMPTY); 98 if (ungetc(c, infile) == EOF) 99 ERREXIT(cinfo, JERR_UNGETC_FAILED); 100 101 switch (c) { 102 #ifdef BMP_SUPPORTED 103 case 'B': 104 return jinit_read_bmp(cinfo); 105 #endif 106 #ifdef GIF_SUPPORTED 107 case 'G': 108 return jinit_read_gif(cinfo); 109 #endif 110 #ifdef PPM_SUPPORTED 111 case 'P': 112 return jinit_read_ppm(cinfo); 113 #endif 114 #ifdef RLE_SUPPORTED 115 case 'R': 116 return jinit_read_rle(cinfo); 117 #endif 118 #ifdef TARGA_SUPPORTED 119 case 0x00: 120 return jinit_read_targa(cinfo); 121 #endif 122 default: 123 ERREXIT(cinfo, JERR_UNKNOWN_FORMAT); 124 break; 125 } 126 127 return NULL; /* suppress compiler warnings */ 128 } 129 130 131 /* 132 * Argument-parsing code. 133 * The switch parser is designed to be useful with DOS-style command line 134 * syntax, ie, intermixed switches and file names, where only the switches 135 * to the left of a given file name affect processing of that file. 136 * The main program in this file doesn't actually use this capability... 137 */ 138 139 140 static const char * progname; /* program name for error messages */ 141 static char * outfilename; /* for -outfile switch */ 142 boolean memdst; /* for -memdst switch */ 143 144 145 LOCAL(void) 146 usage (void) 147 /* complain about bad command line */ 148 { 149 fprintf(stderr, "usage: %s [switches] ", progname); 150 #ifdef TWO_FILE_COMMANDLINE 151 fprintf(stderr, "inputfile outputfile\n"); 152 #else 153 fprintf(stderr, "[inputfile]\n"); 154 #endif 155 156 fprintf(stderr, "Switches (names may be abbreviated):\n"); 157 fprintf(stderr, " -quality N[,...] Compression quality (0..100; 5-95 is useful range)\n"); 158 fprintf(stderr, " -grayscale Create monochrome JPEG file\n"); 159 fprintf(stderr, " -rgb Create RGB JPEG file\n"); 160 #ifdef ENTROPY_OPT_SUPPORTED 161 fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n"); 162 #endif 163 #ifdef C_PROGRESSIVE_SUPPORTED 164 fprintf(stderr, " -progressive Create progressive JPEG file\n"); 165 #endif 166 #ifdef TARGA_SUPPORTED 167 fprintf(stderr, " -targa Input file is Targa format (usually not needed)\n"); 168 #endif 169 fprintf(stderr, "Switches for advanced users:\n"); 170 #ifdef C_ARITH_CODING_SUPPORTED 171 fprintf(stderr, " -arithmetic Use arithmetic coding\n"); 172 #endif 173 #ifdef DCT_ISLOW_SUPPORTED 174 fprintf(stderr, " -dct int Use integer DCT method%s\n", 175 (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : "")); 176 #endif 177 #ifdef DCT_IFAST_SUPPORTED 178 fprintf(stderr, " -dct fast Use fast integer DCT (less accurate)%s\n", 179 (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : "")); 180 #endif 181 #ifdef DCT_FLOAT_SUPPORTED 182 fprintf(stderr, " -dct float Use floating-point DCT method%s\n", 183 (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : "")); 184 #endif 185 fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n"); 186 #ifdef INPUT_SMOOTHING_SUPPORTED 187 fprintf(stderr, " -smooth N Smooth dithered input (N=1..100 is strength)\n"); 188 #endif 189 fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n"); 190 fprintf(stderr, " -outfile name Specify name for output file\n"); 191 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED) 192 fprintf(stderr, " -memdst Compress to memory instead of file (useful for benchmarking)\n"); 193 #endif 194 fprintf(stderr, " -verbose or -debug Emit debug output\n"); 195 fprintf(stderr, "Switches for wizards:\n"); 196 fprintf(stderr, " -baseline Force baseline quantization tables\n"); 197 fprintf(stderr, " -qtables file Use quantization tables given in file\n"); 198 fprintf(stderr, " -qslots N[,...] Set component quantization tables\n"); 199 fprintf(stderr, " -sample HxV[,...] Set component sampling factors\n"); 200 #ifdef C_MULTISCAN_FILES_SUPPORTED 201 fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n"); 202 #endif 203 exit(EXIT_FAILURE); 204 } 205 206 207 LOCAL(int) 208 parse_switches (j_compress_ptr cinfo, int argc, char **argv, 209 int last_file_arg_seen, boolean for_real) 210 /* Parse optional switches. 211 * Returns argv[] index of first file-name argument (== argc if none). 212 * Any file names with indexes <= last_file_arg_seen are ignored; 213 * they have presumably been processed in a previous iteration. 214 * (Pass 0 for last_file_arg_seen on the first or only iteration.) 215 * for_real is FALSE on the first (dummy) pass; we may skip any expensive 216 * processing. 217 */ 218 { 219 int argn; 220 char * arg; 221 boolean force_baseline; 222 boolean simple_progressive; 223 char * qualityarg = NULL; /* saves -quality parm if any */ 224 char * qtablefile = NULL; /* saves -qtables filename if any */ 225 char * qslotsarg = NULL; /* saves -qslots parm if any */ 226 char * samplearg = NULL; /* saves -sample parm if any */ 227 char * scansarg = NULL; /* saves -scans parm if any */ 228 229 /* Set up default JPEG parameters. */ 230 231 force_baseline = FALSE; /* by default, allow 16-bit quantizers */ 232 simple_progressive = FALSE; 233 is_targa = FALSE; 234 outfilename = NULL; 235 memdst = FALSE; 236 cinfo->err->trace_level = 0; 237 238 /* Scan command line options, adjust parameters */ 239 240 for (argn = 1; argn < argc; argn++) { 241 arg = argv[argn]; 242 if (*arg != '-') { 243 /* Not a switch, must be a file name argument */ 244 if (argn <= last_file_arg_seen) { 245 outfilename = NULL; /* -outfile applies to just one input file */ 246 continue; /* ignore this name if previously processed */ 247 } 248 break; /* else done parsing switches */ 249 } 250 arg++; /* advance past switch marker character */ 251 252 if (keymatch(arg, "arithmetic", 1)) { 253 /* Use arithmetic coding. */ 254 #ifdef C_ARITH_CODING_SUPPORTED 255 cinfo->arith_code = TRUE; 256 #else 257 fprintf(stderr, "%s: sorry, arithmetic coding not supported\n", 258 progname); 259 exit(EXIT_FAILURE); 260 #endif 261 262 } else if (keymatch(arg, "baseline", 1)) { 263 /* Force baseline-compatible output (8-bit quantizer values). */ 264 force_baseline = TRUE; 265 266 } else if (keymatch(arg, "dct", 2)) { 267 /* Select DCT algorithm. */ 268 if (++argn >= argc) /* advance to next argument */ 269 usage(); 270 if (keymatch(argv[argn], "int", 1)) { 271 cinfo->dct_method = JDCT_ISLOW; 272 } else if (keymatch(argv[argn], "fast", 2)) { 273 cinfo->dct_method = JDCT_IFAST; 274 } else if (keymatch(argv[argn], "float", 2)) { 275 cinfo->dct_method = JDCT_FLOAT; 276 } else 277 usage(); 278 279 } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) { 280 /* Enable debug printouts. */ 281 /* On first -d, print version identification */ 282 static boolean printed_version = FALSE; 283 284 if (! printed_version) { 285 fprintf(stderr, "%s version %s (build %s)\n", 286 PACKAGE_NAME, VERSION, BUILD); 287 fprintf(stderr, "%s\n\n", JCOPYRIGHT); 288 fprintf(stderr, "Emulating The Independent JPEG Group's software, version %s\n\n", 289 JVERSION); 290 printed_version = TRUE; 291 } 292 cinfo->err->trace_level++; 293 294 } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) { 295 /* Force a monochrome JPEG file to be generated. */ 296 jpeg_set_colorspace(cinfo, JCS_GRAYSCALE); 297 298 } else if (keymatch(arg, "rgb", 3)) { 299 /* Force an RGB JPEG file to be generated. */ 300 jpeg_set_colorspace(cinfo, JCS_RGB); 301 302 } else if (keymatch(arg, "maxmemory", 3)) { 303 /* Maximum memory in Kb (or Mb with 'm'). */ 304 long lval; 305 char ch = 'x'; 306 307 if (++argn >= argc) /* advance to next argument */ 308 usage(); 309 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1) 310 usage(); 311 if (ch == 'm' || ch == 'M') 312 lval *= 1000L; 313 cinfo->mem->max_memory_to_use = lval * 1000L; 314 315 } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) { 316 /* Enable entropy parm optimization. */ 317 #ifdef ENTROPY_OPT_SUPPORTED 318 cinfo->optimize_coding = TRUE; 319 #else 320 fprintf(stderr, "%s: sorry, entropy optimization was not compiled in\n", 321 progname); 322 exit(EXIT_FAILURE); 323 #endif 324 325 } else if (keymatch(arg, "outfile", 4)) { 326 /* Set output file name. */ 327 if (++argn >= argc) /* advance to next argument */ 328 usage(); 329 outfilename = argv[argn]; /* save it away for later use */ 330 331 } else if (keymatch(arg, "progressive", 1)) { 332 /* Select simple progressive mode. */ 333 #ifdef C_PROGRESSIVE_SUPPORTED 334 simple_progressive = TRUE; 335 /* We must postpone execution until num_components is known. */ 336 #else 337 fprintf(stderr, "%s: sorry, progressive output was not compiled in\n", 338 progname); 339 exit(EXIT_FAILURE); 340 #endif 341 342 } else if (keymatch(arg, "memdst", 2)) { 343 /* Use in-memory destination manager */ 344 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED) 345 memdst = TRUE; 346 #else 347 fprintf(stderr, "%s: sorry, in-memory destination manager was not compiled in\n", 348 progname); 349 exit(EXIT_FAILURE); 350 #endif 351 352 } else if (keymatch(arg, "quality", 1)) { 353 /* Quality ratings (quantization table scaling factors). */ 354 if (++argn >= argc) /* advance to next argument */ 355 usage(); 356 qualityarg = argv[argn]; 357 358 } else if (keymatch(arg, "qslots", 2)) { 359 /* Quantization table slot numbers. */ 360 if (++argn >= argc) /* advance to next argument */ 361 usage(); 362 qslotsarg = argv[argn]; 363 /* Must delay setting qslots until after we have processed any 364 * colorspace-determining switches, since jpeg_set_colorspace sets 365 * default quant table numbers. 366 */ 367 368 } else if (keymatch(arg, "qtables", 2)) { 369 /* Quantization tables fetched from file. */ 370 if (++argn >= argc) /* advance to next argument */ 371 usage(); 372 qtablefile = argv[argn]; 373 /* We postpone actually reading the file in case -quality comes later. */ 374 375 } else if (keymatch(arg, "restart", 1)) { 376 /* Restart interval in MCU rows (or in MCUs with 'b'). */ 377 long lval; 378 char ch = 'x'; 379 380 if (++argn >= argc) /* advance to next argument */ 381 usage(); 382 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1) 383 usage(); 384 if (lval < 0 || lval > 65535L) 385 usage(); 386 if (ch == 'b' || ch == 'B') { 387 cinfo->restart_interval = (unsigned int) lval; 388 cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */ 389 } else { 390 cinfo->restart_in_rows = (int) lval; 391 /* restart_interval will be computed during startup */ 392 } 393 394 } else if (keymatch(arg, "sample", 2)) { 395 /* Set sampling factors. */ 396 if (++argn >= argc) /* advance to next argument */ 397 usage(); 398 samplearg = argv[argn]; 399 /* Must delay setting sample factors until after we have processed any 400 * colorspace-determining switches, since jpeg_set_colorspace sets 401 * default sampling factors. 402 */ 403 404 } else if (keymatch(arg, "scans", 4)) { 405 /* Set scan script. */ 406 #ifdef C_MULTISCAN_FILES_SUPPORTED 407 if (++argn >= argc) /* advance to next argument */ 408 usage(); 409 scansarg = argv[argn]; 410 /* We must postpone reading the file in case -progressive appears. */ 411 #else 412 fprintf(stderr, "%s: sorry, multi-scan output was not compiled in\n", 413 progname); 414 exit(EXIT_FAILURE); 415 #endif 416 417 } else if (keymatch(arg, "smooth", 2)) { 418 /* Set input smoothing factor. */ 419 int val; 420 421 if (++argn >= argc) /* advance to next argument */ 422 usage(); 423 if (sscanf(argv[argn], "%d", &val) != 1) 424 usage(); 425 if (val < 0 || val > 100) 426 usage(); 427 cinfo->smoothing_factor = val; 428 429 } else if (keymatch(arg, "targa", 1)) { 430 /* Input file is Targa format. */ 431 is_targa = TRUE; 432 433 } else { 434 usage(); /* bogus switch */ 435 } 436 } 437 438 /* Post-switch-scanning cleanup */ 439 440 if (for_real) { 441 442 /* Set quantization tables for selected quality. */ 443 /* Some or all may be overridden if -qtables is present. */ 444 if (qualityarg != NULL) /* process -quality if it was present */ 445 if (! set_quality_ratings(cinfo, qualityarg, force_baseline)) 446 usage(); 447 448 if (qtablefile != NULL) /* process -qtables if it was present */ 449 if (! read_quant_tables(cinfo, qtablefile, force_baseline)) 450 usage(); 451 452 if (qslotsarg != NULL) /* process -qslots if it was present */ 453 if (! set_quant_slots(cinfo, qslotsarg)) 454 usage(); 455 456 if (samplearg != NULL) /* process -sample if it was present */ 457 if (! set_sample_factors(cinfo, samplearg)) 458 usage(); 459 460 #ifdef C_PROGRESSIVE_SUPPORTED 461 if (simple_progressive) /* process -progressive; -scans can override */ 462 jpeg_simple_progression(cinfo); 463 #endif 464 465 #ifdef C_MULTISCAN_FILES_SUPPORTED 466 if (scansarg != NULL) /* process -scans if it was present */ 467 if (! read_scan_script(cinfo, scansarg)) 468 usage(); 469 #endif 470 } 471 472 return argn; /* return index of next arg (file name) */ 473 } 474 475 476 /* 477 * The main program. 478 */ 479 480 int 481 main (int argc, char **argv) 482 { 483 struct jpeg_compress_struct cinfo; 484 struct jpeg_error_mgr jerr; 485 #ifdef PROGRESS_REPORT 486 struct cdjpeg_progress_mgr progress; 487 #endif 488 int file_index; 489 cjpeg_source_ptr src_mgr; 490 FILE * input_file; 491 FILE * output_file = NULL; 492 unsigned char *outbuffer = NULL; 493 unsigned long outsize = 0; 494 JDIMENSION num_scanlines; 495 496 /* On Mac, fetch a command line. */ 497 #ifdef USE_CCOMMAND 498 argc = ccommand(&argv); 499 #endif 500 501 progname = argv[0]; 502 if (progname == NULL || progname[0] == 0) 503 progname = "cjpeg"; /* in case C library doesn't provide it */ 504 505 /* Initialize the JPEG compression object with default error handling. */ 506 cinfo.err = jpeg_std_error(&jerr); 507 jpeg_create_compress(&cinfo); 508 /* Add some application-specific error messages (from cderror.h) */ 509 jerr.addon_message_table = cdjpeg_message_table; 510 jerr.first_addon_message = JMSG_FIRSTADDONCODE; 511 jerr.last_addon_message = JMSG_LASTADDONCODE; 512 513 /* Now safe to enable signal catcher. */ 514 #ifdef NEED_SIGNAL_CATCHER 515 enable_signal_catcher((j_common_ptr) &cinfo); 516 #endif 517 518 /* Initialize JPEG parameters. 519 * Much of this may be overridden later. 520 * In particular, we don't yet know the input file's color space, 521 * but we need to provide some value for jpeg_set_defaults() to work. 522 */ 523 524 cinfo.in_color_space = JCS_RGB; /* arbitrary guess */ 525 jpeg_set_defaults(&cinfo); 526 527 /* Scan command line to find file names. 528 * It is convenient to use just one switch-parsing routine, but the switch 529 * values read here are ignored; we will rescan the switches after opening 530 * the input file. 531 */ 532 533 file_index = parse_switches(&cinfo, argc, argv, 0, FALSE); 534 535 #ifdef TWO_FILE_COMMANDLINE 536 if (!memdst) { 537 /* Must have either -outfile switch or explicit output file name */ 538 if (outfilename == NULL) { 539 if (file_index != argc-2) { 540 fprintf(stderr, "%s: must name one input and one output file\n", 541 progname); 542 usage(); 543 } 544 outfilename = argv[file_index+1]; 545 } else { 546 if (file_index != argc-1) { 547 fprintf(stderr, "%s: must name one input and one output file\n", 548 progname); 549 usage(); 550 } 551 } 552 } 553 #else 554 /* Unix style: expect zero or one file name */ 555 if (file_index < argc-1) { 556 fprintf(stderr, "%s: only one input file\n", progname); 557 usage(); 558 } 559 #endif /* TWO_FILE_COMMANDLINE */ 560 561 /* Open the input file. */ 562 if (file_index < argc) { 563 if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) { 564 fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]); 565 exit(EXIT_FAILURE); 566 } 567 } else { 568 /* default input file is stdin */ 569 input_file = read_stdin(); 570 } 571 572 /* Open the output file. */ 573 if (outfilename != NULL) { 574 if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) { 575 fprintf(stderr, "%s: can't open %s\n", progname, outfilename); 576 exit(EXIT_FAILURE); 577 } 578 } else if (!memdst) { 579 /* default output file is stdout */ 580 output_file = write_stdout(); 581 } 582 583 #ifdef PROGRESS_REPORT 584 start_progress_monitor((j_common_ptr) &cinfo, &progress); 585 #endif 586 587 /* Figure out the input file format, and set up to read it. */ 588 src_mgr = select_file_type(&cinfo, input_file); 589 src_mgr->input_file = input_file; 590 591 /* Read the input file header to obtain file size & colorspace. */ 592 (*src_mgr->start_input) (&cinfo, src_mgr); 593 594 /* Now that we know input colorspace, fix colorspace-dependent defaults */ 595 jpeg_default_colorspace(&cinfo); 596 597 /* Adjust default compression parameters by re-parsing the options */ 598 file_index = parse_switches(&cinfo, argc, argv, 0, TRUE); 599 600 /* Specify data destination for compression */ 601 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED) 602 if (memdst) 603 jpeg_mem_dest(&cinfo, &outbuffer, &outsize); 604 else 605 #endif 606 jpeg_stdio_dest(&cinfo, output_file); 607 608 /* Start compressor */ 609 jpeg_start_compress(&cinfo, TRUE); 610 611 /* Process data */ 612 while (cinfo.next_scanline < cinfo.image_height) { 613 num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr); 614 (void) jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines); 615 } 616 617 /* Finish compression and release memory */ 618 (*src_mgr->finish_input) (&cinfo, src_mgr); 619 jpeg_finish_compress(&cinfo); 620 jpeg_destroy_compress(&cinfo); 621 622 /* Close files, if we opened them */ 623 if (input_file != stdin) 624 fclose(input_file); 625 if (output_file != stdout && output_file != NULL) 626 fclose(output_file); 627 628 #ifdef PROGRESS_REPORT 629 end_progress_monitor((j_common_ptr) &cinfo); 630 #endif 631 632 if (memdst) { 633 fprintf(stderr, "Compressed size: %lu bytes\n", outsize); 634 if (outbuffer != NULL) 635 free(outbuffer); 636 } 637 638 /* All done. */ 639 exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS); 640 return 0; /* suppress no-return-value warnings */ 641 } 642
