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, 2013-2014, 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 "jconfigint.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)
select_file_type(j_compress_ptr cinfo,FILE * infile)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)
usage(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, " -version Print version information and exit\n");
196 fprintf(stderr, "Switches for wizards:\n");
197 fprintf(stderr, " -baseline Force baseline quantization tables\n");
198 fprintf(stderr, " -qtables file Use quantization tables given in file\n");
199 fprintf(stderr, " -qslots N[,...] Set component quantization tables\n");
200 fprintf(stderr, " -sample HxV[,...] Set component sampling factors\n");
201 #ifdef C_MULTISCAN_FILES_SUPPORTED
202 fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n");
203 #endif
204 exit(EXIT_FAILURE);
205 }
206
207
208 LOCAL(int)
parse_switches(j_compress_ptr cinfo,int argc,char ** argv,int last_file_arg_seen,boolean for_real)209 parse_switches (j_compress_ptr cinfo, int argc, char **argv,
210 int last_file_arg_seen, boolean for_real)
211 /* Parse optional switches.
212 * Returns argv[] index of first file-name argument (== argc if none).
213 * Any file names with indexes <= last_file_arg_seen are ignored;
214 * they have presumably been processed in a previous iteration.
215 * (Pass 0 for last_file_arg_seen on the first or only iteration.)
216 * for_real is FALSE on the first (dummy) pass; we may skip any expensive
217 * processing.
218 */
219 {
220 int argn;
221 char * arg;
222 boolean force_baseline;
223 boolean simple_progressive;
224 char * qualityarg = NULL; /* saves -quality parm if any */
225 char * qtablefile = NULL; /* saves -qtables filename if any */
226 char * qslotsarg = NULL; /* saves -qslots parm if any */
227 char * samplearg = NULL; /* saves -sample parm if any */
228 char * scansarg = NULL; /* saves -scans parm if any */
229
230 /* Set up default JPEG parameters. */
231
232 force_baseline = FALSE; /* by default, allow 16-bit quantizers */
233 simple_progressive = FALSE;
234 is_targa = FALSE;
235 outfilename = NULL;
236 memdst = FALSE;
237 cinfo->err->trace_level = 0;
238
239 /* Scan command line options, adjust parameters */
240
241 for (argn = 1; argn < argc; argn++) {
242 arg = argv[argn];
243 if (*arg != '-') {
244 /* Not a switch, must be a file name argument */
245 if (argn <= last_file_arg_seen) {
246 outfilename = NULL; /* -outfile applies to just one input file */
247 continue; /* ignore this name if previously processed */
248 }
249 break; /* else done parsing switches */
250 }
251 arg++; /* advance past switch marker character */
252
253 if (keymatch(arg, "arithmetic", 1)) {
254 /* Use arithmetic coding. */
255 #ifdef C_ARITH_CODING_SUPPORTED
256 cinfo->arith_code = TRUE;
257 #else
258 fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
259 progname);
260 exit(EXIT_FAILURE);
261 #endif
262
263 } else if (keymatch(arg, "baseline", 1)) {
264 /* Force baseline-compatible output (8-bit quantizer values). */
265 force_baseline = TRUE;
266
267 } else if (keymatch(arg, "dct", 2)) {
268 /* Select DCT algorithm. */
269 if (++argn >= argc) /* advance to next argument */
270 usage();
271 if (keymatch(argv[argn], "int", 1)) {
272 cinfo->dct_method = JDCT_ISLOW;
273 } else if (keymatch(argv[argn], "fast", 2)) {
274 cinfo->dct_method = JDCT_IFAST;
275 } else if (keymatch(argv[argn], "float", 2)) {
276 cinfo->dct_method = JDCT_FLOAT;
277 } else
278 usage();
279
280 } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
281 /* Enable debug printouts. */
282 /* On first -d, print version identification */
283 static boolean printed_version = FALSE;
284
285 if (! printed_version) {
286 fprintf(stderr, "%s version %s (build %s)\n",
287 PACKAGE_NAME, VERSION, BUILD);
288 fprintf(stderr, "%s\n\n", JCOPYRIGHT);
289 fprintf(stderr, "Emulating The Independent JPEG Group's software, version %s\n\n",
290 JVERSION);
291 printed_version = TRUE;
292 }
293 cinfo->err->trace_level++;
294
295 } else if (keymatch(arg, "version", 4)) {
296 fprintf(stderr, "%s version %s (build %s)\n",
297 PACKAGE_NAME, VERSION, BUILD);
298 exit(EXIT_SUCCESS);
299
300 } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
301 /* Force a monochrome JPEG file to be generated. */
302 jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
303
304 } else if (keymatch(arg, "rgb", 3)) {
305 /* Force an RGB JPEG file to be generated. */
306 jpeg_set_colorspace(cinfo, JCS_RGB);
307
308 } else if (keymatch(arg, "maxmemory", 3)) {
309 /* Maximum memory in Kb (or Mb with 'm'). */
310 long lval;
311 char ch = 'x';
312
313 if (++argn >= argc) /* advance to next argument */
314 usage();
315 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
316 usage();
317 if (ch == 'm' || ch == 'M')
318 lval *= 1000L;
319 cinfo->mem->max_memory_to_use = lval * 1000L;
320
321 } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
322 /* Enable entropy parm optimization. */
323 #ifdef ENTROPY_OPT_SUPPORTED
324 cinfo->optimize_coding = TRUE;
325 #else
326 fprintf(stderr, "%s: sorry, entropy optimization was not compiled in\n",
327 progname);
328 exit(EXIT_FAILURE);
329 #endif
330
331 } else if (keymatch(arg, "outfile", 4)) {
332 /* Set output file name. */
333 if (++argn >= argc) /* advance to next argument */
334 usage();
335 outfilename = argv[argn]; /* save it away for later use */
336
337 } else if (keymatch(arg, "progressive", 1)) {
338 /* Select simple progressive mode. */
339 #ifdef C_PROGRESSIVE_SUPPORTED
340 simple_progressive = TRUE;
341 /* We must postpone execution until num_components is known. */
342 #else
343 fprintf(stderr, "%s: sorry, progressive output was not compiled in\n",
344 progname);
345 exit(EXIT_FAILURE);
346 #endif
347
348 } else if (keymatch(arg, "memdst", 2)) {
349 /* Use in-memory destination manager */
350 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
351 memdst = TRUE;
352 #else
353 fprintf(stderr, "%s: sorry, in-memory destination manager was not compiled in\n",
354 progname);
355 exit(EXIT_FAILURE);
356 #endif
357
358 } else if (keymatch(arg, "quality", 1)) {
359 /* Quality ratings (quantization table scaling factors). */
360 if (++argn >= argc) /* advance to next argument */
361 usage();
362 qualityarg = argv[argn];
363
364 } else if (keymatch(arg, "qslots", 2)) {
365 /* Quantization table slot numbers. */
366 if (++argn >= argc) /* advance to next argument */
367 usage();
368 qslotsarg = argv[argn];
369 /* Must delay setting qslots until after we have processed any
370 * colorspace-determining switches, since jpeg_set_colorspace sets
371 * default quant table numbers.
372 */
373
374 } else if (keymatch(arg, "qtables", 2)) {
375 /* Quantization tables fetched from file. */
376 if (++argn >= argc) /* advance to next argument */
377 usage();
378 qtablefile = argv[argn];
379 /* We postpone actually reading the file in case -quality comes later. */
380
381 } else if (keymatch(arg, "restart", 1)) {
382 /* Restart interval in MCU rows (or in MCUs with 'b'). */
383 long lval;
384 char ch = 'x';
385
386 if (++argn >= argc) /* advance to next argument */
387 usage();
388 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
389 usage();
390 if (lval < 0 || lval > 65535L)
391 usage();
392 if (ch == 'b' || ch == 'B') {
393 cinfo->restart_interval = (unsigned int) lval;
394 cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
395 } else {
396 cinfo->restart_in_rows = (int) lval;
397 /* restart_interval will be computed during startup */
398 }
399
400 } else if (keymatch(arg, "sample", 2)) {
401 /* Set sampling factors. */
402 if (++argn >= argc) /* advance to next argument */
403 usage();
404 samplearg = argv[argn];
405 /* Must delay setting sample factors until after we have processed any
406 * colorspace-determining switches, since jpeg_set_colorspace sets
407 * default sampling factors.
408 */
409
410 } else if (keymatch(arg, "scans", 4)) {
411 /* Set scan script. */
412 #ifdef C_MULTISCAN_FILES_SUPPORTED
413 if (++argn >= argc) /* advance to next argument */
414 usage();
415 scansarg = argv[argn];
416 /* We must postpone reading the file in case -progressive appears. */
417 #else
418 fprintf(stderr, "%s: sorry, multi-scan output was not compiled in\n",
419 progname);
420 exit(EXIT_FAILURE);
421 #endif
422
423 } else if (keymatch(arg, "smooth", 2)) {
424 /* Set input smoothing factor. */
425 int val;
426
427 if (++argn >= argc) /* advance to next argument */
428 usage();
429 if (sscanf(argv[argn], "%d", &val) != 1)
430 usage();
431 if (val < 0 || val > 100)
432 usage();
433 cinfo->smoothing_factor = val;
434
435 } else if (keymatch(arg, "targa", 1)) {
436 /* Input file is Targa format. */
437 is_targa = TRUE;
438
439 } else {
440 usage(); /* bogus switch */
441 }
442 }
443
444 /* Post-switch-scanning cleanup */
445
446 if (for_real) {
447
448 /* Set quantization tables for selected quality. */
449 /* Some or all may be overridden if -qtables is present. */
450 if (qualityarg != NULL) /* process -quality if it was present */
451 if (! set_quality_ratings(cinfo, qualityarg, force_baseline))
452 usage();
453
454 if (qtablefile != NULL) /* process -qtables if it was present */
455 if (! read_quant_tables(cinfo, qtablefile, force_baseline))
456 usage();
457
458 if (qslotsarg != NULL) /* process -qslots if it was present */
459 if (! set_quant_slots(cinfo, qslotsarg))
460 usage();
461
462 if (samplearg != NULL) /* process -sample if it was present */
463 if (! set_sample_factors(cinfo, samplearg))
464 usage();
465
466 #ifdef C_PROGRESSIVE_SUPPORTED
467 if (simple_progressive) /* process -progressive; -scans can override */
468 jpeg_simple_progression(cinfo);
469 #endif
470
471 #ifdef C_MULTISCAN_FILES_SUPPORTED
472 if (scansarg != NULL) /* process -scans if it was present */
473 if (! read_scan_script(cinfo, scansarg))
474 usage();
475 #endif
476 }
477
478 return argn; /* return index of next arg (file name) */
479 }
480
481
482 /*
483 * The main program.
484 */
485
486 int
main(int argc,char ** argv)487 main (int argc, char **argv)
488 {
489 struct jpeg_compress_struct cinfo;
490 struct jpeg_error_mgr jerr;
491 #ifdef PROGRESS_REPORT
492 struct cdjpeg_progress_mgr progress;
493 #endif
494 int file_index;
495 cjpeg_source_ptr src_mgr;
496 FILE * input_file;
497 FILE * output_file = NULL;
498 unsigned char *outbuffer = NULL;
499 unsigned long outsize = 0;
500 JDIMENSION num_scanlines;
501
502 /* On Mac, fetch a command line. */
503 #ifdef USE_CCOMMAND
504 argc = ccommand(&argv);
505 #endif
506
507 progname = argv[0];
508 if (progname == NULL || progname[0] == 0)
509 progname = "cjpeg"; /* in case C library doesn't provide it */
510
511 /* Initialize the JPEG compression object with default error handling. */
512 cinfo.err = jpeg_std_error(&jerr);
513 jpeg_create_compress(&cinfo);
514 /* Add some application-specific error messages (from cderror.h) */
515 jerr.addon_message_table = cdjpeg_message_table;
516 jerr.first_addon_message = JMSG_FIRSTADDONCODE;
517 jerr.last_addon_message = JMSG_LASTADDONCODE;
518
519 /* Initialize JPEG parameters.
520 * Much of this may be overridden later.
521 * In particular, we don't yet know the input file's color space,
522 * but we need to provide some value for jpeg_set_defaults() to work.
523 */
524
525 cinfo.in_color_space = JCS_RGB; /* arbitrary guess */
526 jpeg_set_defaults(&cinfo);
527
528 /* Scan command line to find file names.
529 * It is convenient to use just one switch-parsing routine, but the switch
530 * values read here are ignored; we will rescan the switches after opening
531 * the input file.
532 */
533
534 file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
535
536 #ifdef TWO_FILE_COMMANDLINE
537 if (!memdst) {
538 /* Must have either -outfile switch or explicit output file name */
539 if (outfilename == NULL) {
540 if (file_index != argc-2) {
541 fprintf(stderr, "%s: must name one input and one output file\n",
542 progname);
543 usage();
544 }
545 outfilename = argv[file_index+1];
546 } else {
547 if (file_index != argc-1) {
548 fprintf(stderr, "%s: must name one input and one output file\n",
549 progname);
550 usage();
551 }
552 }
553 }
554 #else
555 /* Unix style: expect zero or one file name */
556 if (file_index < argc-1) {
557 fprintf(stderr, "%s: only one input file\n", progname);
558 usage();
559 }
560 #endif /* TWO_FILE_COMMANDLINE */
561
562 /* Open the input file. */
563 if (file_index < argc) {
564 if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
565 fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
566 exit(EXIT_FAILURE);
567 }
568 } else {
569 /* default input file is stdin */
570 input_file = read_stdin();
571 }
572
573 /* Open the output file. */
574 if (outfilename != NULL) {
575 if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
576 fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
577 exit(EXIT_FAILURE);
578 }
579 } else if (!memdst) {
580 /* default output file is stdout */
581 output_file = write_stdout();
582 }
583
584 #ifdef PROGRESS_REPORT
585 start_progress_monitor((j_common_ptr) &cinfo, &progress);
586 #endif
587
588 /* Figure out the input file format, and set up to read it. */
589 src_mgr = select_file_type(&cinfo, input_file);
590 src_mgr->input_file = input_file;
591
592 /* Read the input file header to obtain file size & colorspace. */
593 (*src_mgr->start_input) (&cinfo, src_mgr);
594
595 /* Now that we know input colorspace, fix colorspace-dependent defaults */
596 jpeg_default_colorspace(&cinfo);
597
598 /* Adjust default compression parameters by re-parsing the options */
599 file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
600
601 /* Specify data destination for compression */
602 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
603 if (memdst)
604 jpeg_mem_dest(&cinfo, &outbuffer, &outsize);
605 else
606 #endif
607 jpeg_stdio_dest(&cinfo, output_file);
608
609 /* Start compressor */
610 jpeg_start_compress(&cinfo, TRUE);
611
612 /* Process data */
613 while (cinfo.next_scanline < cinfo.image_height) {
614 num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr);
615 (void) jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines);
616 }
617
618 /* Finish compression and release memory */
619 (*src_mgr->finish_input) (&cinfo, src_mgr);
620 jpeg_finish_compress(&cinfo);
621 jpeg_destroy_compress(&cinfo);
622
623 /* Close files, if we opened them */
624 if (input_file != stdin)
625 fclose(input_file);
626 if (output_file != stdout && output_file != NULL)
627 fclose(output_file);
628
629 #ifdef PROGRESS_REPORT
630 end_progress_monitor((j_common_ptr) &cinfo);
631 #endif
632
633 if (memdst) {
634 fprintf(stderr, "Compressed size: %lu bytes\n", outsize);
635 if (outbuffer != NULL)
636 free(outbuffer);
637 }
638
639 /* All done. */
640 exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
641 return 0; /* suppress no-return-value warnings */
642 }
643