jpeg/cjpeg.c

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