ReactOS 0.4.15-dev-8191-gbc6c731
wrjpgcom.c
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1/*
2 * wrjpgcom.c
3 *
4 * Copyright (C) 1994-1997, Thomas G. Lane.
5 * Modified 2015-2017 by Guido Vollbeding.
6 * This file is part of the Independent JPEG Group's software.
7 * For conditions of distribution and use, see the accompanying README file.
8 *
9 * This file contains a very simple stand-alone application that inserts
10 * user-supplied text as a COM (comment) marker in a JFIF file.
11 * This may be useful as an example of the minimum logic needed to parse
12 * JPEG markers.
13 */
14
15#define JPEG_CJPEG_DJPEG /* to get the command-line config symbols */
16#include "jinclude.h" /* get auto-config symbols, <stdio.h> */
17
18#ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc() */
19extern void * malloc ();
20#endif
21#include <ctype.h> /* to declare isupper(), tolower() */
22#ifdef USE_SETMODE
23#include <fcntl.h> /* to declare setmode()'s parameter macros */
24/* If you have setmode() but not <io.h>, just delete this line: */
25#include <io.h> /* to declare setmode() */
26#endif
27
28#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
29#ifdef __MWERKS__
30#include <SIOUX.h> /* Metrowerks needs this */
31#include <console.h> /* ... and this */
32#endif
33#ifdef THINK_C
34#include <console.h> /* Think declares it here */
35#endif
36#endif
37
38#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
39#define READ_BINARY "r"
40#define WRITE_BINARY "w"
41#else
42#ifdef VMS /* VMS is very nonstandard */
43#define READ_BINARY "rb", "ctx=stm"
44#define WRITE_BINARY "wb", "ctx=stm"
45#else /* standard ANSI-compliant case */
46#define READ_BINARY "rb"
47#define WRITE_BINARY "wb"
48#endif
49#endif
50
51#ifndef EXIT_FAILURE /* define exit() codes if not provided */
52#define EXIT_FAILURE 1
53#endif
54#ifndef EXIT_SUCCESS
55#ifdef VMS
56#define EXIT_SUCCESS 1 /* VMS is very nonstandard */
57#else
58#define EXIT_SUCCESS 0
59#endif
60#endif
61
62/* Reduce this value if your malloc() can't allocate blocks up to 64K.
63 * On DOS, compiling in large model is usually a better solution.
64 */
65
66#ifndef MAX_COM_LENGTH
67#define MAX_COM_LENGTH 65000L /* must be <= 65533 in any case */
68#endif
69
70
71/*
72 * These macros are used to read the input file and write the output file.
73 * To reuse this code in another application, you might need to change these.
74 */
75
76static FILE * infile; /* input JPEG file */
77
78/* Return next input byte, or EOF if no more */
79#define NEXTBYTE() getc(infile)
80
81static FILE * outfile; /* output JPEG file */
82
83/* Emit an output byte */
84#define PUTBYTE(x) putc((x), outfile)
85
86
87/* Error exit handler */
88#define ERREXIT(msg) (fprintf(stderr, "%s\n", msg), exit(EXIT_FAILURE))
89
90
91/* Read one byte, testing for EOF */
92static int
94{
95 int c;
96
97 c = NEXTBYTE();
98 if (c == EOF)
99 ERREXIT("Premature EOF in JPEG file");
100 return c;
101}
102
103/* Read 2 bytes, convert to unsigned int */
104/* All 2-byte quantities in JPEG markers are MSB first */
105static unsigned int
107{
108 int c1, c2;
109
110 c1 = NEXTBYTE();
111 if (c1 == EOF)
112 ERREXIT("Premature EOF in JPEG file");
113 c2 = NEXTBYTE();
114 if (c2 == EOF)
115 ERREXIT("Premature EOF in JPEG file");
116 return (((unsigned int) c1) << 8) + ((unsigned int) c2);
117}
118
119
120/* Routines to write data to output file */
121
122static void
124{
125 PUTBYTE(c);
126}
127
128static void
129write_2_bytes (unsigned int val)
130{
131 PUTBYTE((val >> 8) & 0xFF);
132 PUTBYTE(val & 0xFF);
133}
134
135static void
137{
138 PUTBYTE(0xFF);
140}
141
142static void
144{
145 int c;
146
147 while ((c = NEXTBYTE()) != EOF)
148 PUTBYTE(c);
149}
150
151
152/*
153 * JPEG markers consist of one or more 0xFF bytes, followed by a marker
154 * code byte (which is not an FF). Here are the marker codes of interest
155 * in this program. (See jdmarker.c for a more complete list.)
156 */
157
158#define M_SOF0 0xC0 /* Start Of Frame N */
159#define M_SOF1 0xC1 /* N indicates which compression process */
160#define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */
161#define M_SOF3 0xC3
162#define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */
163#define M_SOF6 0xC6
164#define M_SOF7 0xC7
165#define M_SOF9 0xC9
166#define M_SOF10 0xCA
167#define M_SOF11 0xCB
168#define M_SOF13 0xCD
169#define M_SOF14 0xCE
170#define M_SOF15 0xCF
171#define M_SOI 0xD8 /* Start Of Image (beginning of datastream) */
172#define M_EOI 0xD9 /* End Of Image (end of datastream) */
173#define M_SOS 0xDA /* Start Of Scan (begins compressed data) */
174#define M_COM 0xFE /* COMment */
175
176
177/*
178 * Find the next JPEG marker and return its marker code.
179 * We expect at least one FF byte, possibly more if the compressor used FFs
180 * to pad the file. (Padding FFs will NOT be replicated in the output file.)
181 * There could also be non-FF garbage between markers. The treatment of such
182 * garbage is unspecified; we choose to skip over it but emit a warning msg.
183 * NB: this routine must not be used after seeing SOS marker, since it will
184 * not deal correctly with FF/00 sequences in the compressed image data...
185 */
186
187static int
189{
190 int c;
191 int discarded_bytes = 0;
192
193 /* Find 0xFF byte; count and skip any non-FFs. */
194 c = read_1_byte();
195 while (c != 0xFF) {
196 discarded_bytes++;
197 c = read_1_byte();
198 }
199 /* Get marker code byte, swallowing any duplicate FF bytes. Extra FFs
200 * are legal as pad bytes, so don't count them in discarded_bytes.
201 */
202 do {
203 c = read_1_byte();
204 } while (c == 0xFF);
205
206 if (discarded_bytes != 0) {
207 fprintf(stderr, "Warning: garbage data found in JPEG file\n");
208 }
209
210 return c;
211}
212
213
214/*
215 * Read the initial marker, which should be SOI.
216 * For a JFIF file, the first two bytes of the file should be literally
217 * 0xFF M_SOI. To be more general, we could use next_marker, but if the
218 * input file weren't actually JPEG at all, next_marker might read the whole
219 * file and then return a misleading error message...
220 */
221
222static int
224{
225 int c1, c2;
226
227 c1 = NEXTBYTE();
228 c2 = NEXTBYTE();
229 if (c1 != 0xFF || c2 != M_SOI)
230 ERREXIT("Not a JPEG file");
231 return c2;
232}
233
234
235/*
236 * Most types of marker are followed by a variable-length parameter segment.
237 * This routine skips over the parameters for any marker we don't otherwise
238 * want to process.
239 * Note that we MUST skip the parameter segment explicitly in order not to
240 * be fooled by 0xFF bytes that might appear within the parameter segment;
241 * such bytes do NOT introduce new markers.
242 */
243
244static void
246/* Copy an unknown or uninteresting variable-length marker */
247{
248 unsigned int length;
249
250 /* Get the marker parameter length count */
253 /* Length includes itself, so must be at least 2 */
254 if (length < 2)
255 ERREXIT("Erroneous JPEG marker length");
256 length -= 2;
257 /* Copy the remaining bytes */
258 while (length > 0) {
260 length--;
261 }
262}
263
264static void
266/* Skip over an unknown or uninteresting variable-length marker */
267{
268 unsigned int length;
269
270 /* Get the marker parameter length count */
272 /* Length includes itself, so must be at least 2 */
273 if (length < 2)
274 ERREXIT("Erroneous JPEG marker length");
275 length -= 2;
276 /* Skip over the remaining bytes */
277 while (length > 0) {
278 (void) read_1_byte();
279 length--;
280 }
281}
282
283
284/*
285 * Parse the marker stream until SOFn or EOI is seen;
286 * copy data to output, but discard COM markers unless keep_COM is true.
287 */
288
289static int
290scan_JPEG_header (int keep_COM)
291{
292 int marker;
293
294 /* Expect SOI at start of file */
295 if (first_marker() != M_SOI)
296 ERREXIT("Expected SOI marker first");
298
299 /* Scan miscellaneous markers until we reach SOFn. */
300 for (;;) {
302 switch (marker) {
303 /* Note that marker codes 0xC4, 0xC8, 0xCC are not, and must not be,
304 * treated as SOFn. C4 in particular is actually DHT.
305 */
306 case M_SOF0: /* Baseline */
307 case M_SOF1: /* Extended sequential, Huffman */
308 case M_SOF2: /* Progressive, Huffman */
309 case M_SOF3: /* Lossless, Huffman */
310 case M_SOF5: /* Differential sequential, Huffman */
311 case M_SOF6: /* Differential progressive, Huffman */
312 case M_SOF7: /* Differential lossless, Huffman */
313 case M_SOF9: /* Extended sequential, arithmetic */
314 case M_SOF10: /* Progressive, arithmetic */
315 case M_SOF11: /* Lossless, arithmetic */
316 case M_SOF13: /* Differential sequential, arithmetic */
317 case M_SOF14: /* Differential progressive, arithmetic */
318 case M_SOF15: /* Differential lossless, arithmetic */
319 return marker;
320
321 case M_SOS: /* should not see compressed data before SOF */
322 ERREXIT("SOS without prior SOFn");
323 break;
324
325 case M_EOI: /* in case it's a tables-only JPEG stream */
326 return marker;
327
328 case M_COM: /* Existing COM: conditionally discard */
329 if (keep_COM) {
332 } else {
334 }
335 break;
336
337 default: /* Anything else just gets copied */
339 copy_variable(); /* we assume it has a parameter count... */
340 break;
341 }
342 } /* end loop */
343}
344
345
346/* Command line parsing code */
347
348static const char * progname; /* program name for error messages */
349
350
351static void
352usage (void)
353/* complain about bad command line */
354{
355 fprintf(stderr, "wrjpgcom inserts a textual comment in a JPEG file.\n");
356 fprintf(stderr, "You can add to or replace any existing comment(s).\n");
357
358 fprintf(stderr, "Usage: %s [switches] ", progname);
359#ifdef TWO_FILE_COMMANDLINE
360 fprintf(stderr, "inputfile outputfile\n");
361#else
362 fprintf(stderr, "[inputfile]\n");
363#endif
364
365 fprintf(stderr, "Switches (names may be abbreviated):\n");
366 fprintf(stderr, " -replace Delete any existing comments\n");
367 fprintf(stderr, " -comment \"text\" Insert comment with given text\n");
368 fprintf(stderr, " -cfile name Read comment from named file\n");
369 fprintf(stderr, "Notice that you must put quotes around the comment text\n");
370 fprintf(stderr, "when you use -comment.\n");
371 fprintf(stderr, "If you do not give either -comment or -cfile on the command line,\n");
372 fprintf(stderr, "then the comment text is read from standard input.\n");
373 fprintf(stderr, "It can be multiple lines, up to %u characters total.\n",
374 (unsigned int) MAX_COM_LENGTH);
375#ifndef TWO_FILE_COMMANDLINE
376 fprintf(stderr, "You must specify an input JPEG file name when supplying\n");
377 fprintf(stderr, "comment text from standard input.\n");
378#endif
379
381}
382
383
384static int
385keymatch (char * arg, const char * keyword, int minchars)
386/* Case-insensitive matching of (possibly abbreviated) keyword switches. */
387/* keyword is the constant keyword (must be lower case already), */
388/* minchars is length of minimum legal abbreviation. */
389{
390 register int ca, ck;
391 register int nmatched = 0;
392
393 while ((ca = *arg++) != '\0') {
394 if ((ck = *keyword++) == '\0')
395 return 0; /* arg longer than keyword, no good */
396 if (isupper(ca)) /* force arg to lcase (assume ck is already) */
397 ca = tolower(ca);
398 if (ca != ck)
399 return 0; /* no good */
400 nmatched++; /* count matched characters */
401 }
402 /* reached end of argument; fail if it's too short for unique abbrev */
403 if (nmatched < minchars)
404 return 0;
405 return 1; /* A-OK */
406}
407
408
409/*
410 * The main program.
411 */
412
413int
414main (int argc, char **argv)
415{
416 int argn;
417 char * arg;
418 int keep_COM = 1;
419 char * comment_arg = NULL;
420 FILE * comment_file = NULL;
421 unsigned int comment_length = 0;
422 int marker;
423
424 /* On Mac, fetch a command line. */
425#ifdef USE_CCOMMAND
426 argc = ccommand(&argv);
427#endif
428
429 progname = argv[0];
430 if (progname == NULL || progname[0] == 0)
431 progname = "wrjpgcom"; /* in case C library doesn't provide it */
432
433 /* Parse switches, if any */
434 for (argn = 1; argn < argc; argn++) {
435 arg = argv[argn];
436 if (arg[0] != '-')
437 break; /* not switch, must be file name */
438 arg++; /* advance over '-' */
439 if (keymatch(arg, "replace", 1)) {
440 keep_COM = 0;
441 } else if (keymatch(arg, "cfile", 2)) {
442 if (++argn >= argc) usage();
443 if ((comment_file = fopen(argv[argn], "r")) == NULL) {
444 fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
446 }
447 } else if (keymatch(arg, "comment", 1)) {
448 if (++argn >= argc) usage();
449 comment_arg = argv[argn];
450 /* If the comment text starts with '"', then we are probably running
451 * under MS-DOG and must parse out the quoted string ourselves. Sigh.
452 */
453 if (comment_arg[0] == '"') {
454 comment_arg = (char *) malloc((size_t) MAX_COM_LENGTH);
455 if (comment_arg == NULL)
456 ERREXIT("Insufficient memory");
457 if (strlen(argv[argn]+1) >= (size_t) MAX_COM_LENGTH) {
458 fprintf(stderr, "Comment text may not exceed %u bytes\n",
459 (unsigned int) MAX_COM_LENGTH);
461 }
462 strcpy(comment_arg, argv[argn]+1);
463 for (;;) {
464 comment_length = (unsigned int) strlen(comment_arg);
465 if (comment_length > 0 && comment_arg[comment_length-1] == '"') {
466 comment_arg[comment_length-1] = '\0'; /* zap terminating quote */
467 break;
468 }
469 if (++argn >= argc)
470 ERREXIT("Missing ending quote mark");
471 if (strlen(comment_arg) + 1 + strlen(argv[argn]) >=
472 (size_t) MAX_COM_LENGTH) {
473 fprintf(stderr, "Comment text may not exceed %u bytes\n",
474 (unsigned int) MAX_COM_LENGTH);
476 }
477 strcat(comment_arg, " ");
478 strcat(comment_arg, argv[argn]);
479 }
480 } else if (strlen(comment_arg) >= (size_t) MAX_COM_LENGTH) {
481 fprintf(stderr, "Comment text may not exceed %u bytes\n",
482 (unsigned int) MAX_COM_LENGTH);
484 }
485 comment_length = (unsigned int) strlen(comment_arg);
486 } else
487 usage();
488 }
489
490 /* Cannot use both -comment and -cfile. */
491 if (comment_arg != NULL && comment_file != NULL)
492 usage();
493 /* If there is neither -comment nor -cfile, we will read the comment text
494 * from stdin; in this case there MUST be an input JPEG file name.
495 */
496 if (comment_arg == NULL && comment_file == NULL && argn >= argc)
497 usage();
498
499 /* Open the input file. */
500 if (argn < argc) {
501 if ((infile = fopen(argv[argn], READ_BINARY)) == NULL) {
502 fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
504 }
505 } else {
506 /* default input file is stdin */
507#ifdef USE_SETMODE /* need to hack file mode? */
509#endif
510#ifdef USE_FDOPEN /* need to re-open in binary mode? */
511 if ((infile = fdopen(fileno(stdin), READ_BINARY)) == NULL) {
512 fprintf(stderr, "%s: can't open stdin\n", progname);
514 }
515#else
516 infile = stdin;
517#endif
518 }
519
520 /* Open the output file. */
521#ifdef TWO_FILE_COMMANDLINE
522 /* Must have explicit output file name */
523 if (argn != argc-2) {
524 fprintf(stderr, "%s: must name one input and one output file\n",
525 progname);
526 usage();
527 }
528 if ((outfile = fopen(argv[argn+1], WRITE_BINARY)) == NULL) {
529 fprintf(stderr, "%s: can't open %s\n", progname, argv[argn+1]);
531 }
532#else
533 /* Unix style: expect zero or one file name */
534 if (argn < argc-1) {
535 fprintf(stderr, "%s: only one input file\n", progname);
536 usage();
537 }
538 /* default output file is stdout */
539#ifdef USE_SETMODE /* need to hack file mode? */
541#endif
542#ifdef USE_FDOPEN /* need to re-open in binary mode? */
544 fprintf(stderr, "%s: can't open stdout\n", progname);
546 }
547#else
548 outfile = stdout;
549#endif
550#endif /* TWO_FILE_COMMANDLINE */
551
552 /* Collect comment text from comment_file or stdin, if necessary */
553 if (comment_arg == NULL) {
554 FILE * src_file;
555 int c;
556
557 comment_arg = (char *) malloc((size_t) MAX_COM_LENGTH);
558 if (comment_arg == NULL)
559 ERREXIT("Insufficient memory");
560 comment_length = 0;
561 src_file = (comment_file != NULL ? comment_file : stdin);
562 while ((c = getc(src_file)) != EOF) {
563 if (comment_length >= (unsigned int) MAX_COM_LENGTH) {
564 fprintf(stderr, "Comment text may not exceed %u bytes\n",
565 (unsigned int) MAX_COM_LENGTH);
567 }
568 comment_arg[comment_length++] = (char) c;
569 }
570 if (comment_file != NULL)
571 fclose(comment_file);
572 }
573
574 /* Copy JPEG headers until SOFn marker;
575 * we will insert the new comment marker just before SOFn.
576 * This (a) causes the new comment to appear after, rather than before,
577 * existing comments; and (b) ensures that comments come after any JFIF
578 * or JFXX markers, as required by the JFIF specification.
579 */
580 marker = scan_JPEG_header(keep_COM);
581 /* Insert the new COM marker, but only if nonempty text has been supplied */
582 if (comment_length > 0) {
584 write_2_bytes(comment_length + 2);
585 while (comment_length > 0) {
586 write_1_byte(*comment_arg++);
587 comment_length--;
588 }
589 }
590 /* Duplicate the remainder of the source file.
591 * Note that any COM markers occuring after SOF will not be touched.
592 */
595
596 /* All done. */
598 return 0; /* suppress no-return-value warnings */
599}
static int argc
Definition: ServiceArgs.c:12
char * strcat(char *DstString, const char *SrcString)
Definition: utclib.c:568
ACPI_SIZE strlen(const char *String)
Definition: utclib.c:269
#define isupper(c)
Definition: acclib.h:71
int tolower(int c)
Definition: utclib.c:902
char * strcpy(char *DstString, const char *SrcString)
Definition: utclib.c:388
#define fileno
Definition: acwin.h:102
#define O_BINARY
Definition: acwin.h:109
const char int minchars
Definition: cdjpeg.h:154
#define NULL
Definition: types.h:112
static const WCHAR ca[]
Definition: main.c:455
unsigned int(__cdecl typeof(jpeg_read_scanlines))(struct jpeg_decompress_struct *
Definition: typeof.h:31
unsigned char
Definition: typeof.h:29
int main()
Definition: test.c:6
const GLubyte * c
Definition: glext.h:8905
GLuint GLsizei GLsizei * length
Definition: glext.h:6040
GLuint GLfloat * val
Definition: glext.h:7180
#define stdout
Definition: stdio.h:99
_Check_return_ _CRTIMP int __cdecl getc(_Inout_ FILE *_File)
#define EOF
Definition: stdio.h:24
#define stderr
Definition: stdio.h:100
_Check_return_opt_ _CRTIMP int __cdecl fprintf(_Inout_ FILE *_File, _In_z_ _Printf_format_string_ const char *_Format,...)
_Check_return_ _CRTIMP FILE *__cdecl fdopen(_In_ int _FileHandle, _In_z_ const char *_Format)
_Check_return_ _CRTIMP FILE *__cdecl fopen(_In_z_ const char *_Filename, _In_z_ const char *_Mode)
#define stdin
Definition: stdio.h:98
_Check_return_opt_ _CRTIMP int __cdecl fclose(_Inout_ FILE *_File)
int marker
Definition: jpeglib.h:1030
#define c
Definition: ke_i.h:80
#define argv
Definition: mplay32.c:18
#define exit(n)
Definition: config.h:202
#define setmode(f, m)
Definition: io.h:42
void * arg
Definition: msvc.h:10
#define ERREXIT(msg)
Definition: wrjpgcom.c:88
#define M_SOF7
Definition: wrjpgcom.c:164
#define M_SOF6
Definition: wrjpgcom.c:163
#define M_EOI
Definition: wrjpgcom.c:172
#define M_SOF11
Definition: wrjpgcom.c:167
#define M_SOF9
Definition: wrjpgcom.c:165
#define PUTBYTE(x)
Definition: wrjpgcom.c:84
static void skip_variable(void)
Definition: wrjpgcom.c:265
#define EXIT_SUCCESS
Definition: wrjpgcom.c:58
#define M_SOF15
Definition: wrjpgcom.c:170
static void write_marker(int marker)
Definition: wrjpgcom.c:136
#define READ_BINARY
Definition: wrjpgcom.c:46
static void copy_rest_of_file(void)
Definition: wrjpgcom.c:143
#define EXIT_FAILURE
Definition: wrjpgcom.c:52
#define MAX_COM_LENGTH
Definition: wrjpgcom.c:67
#define NEXTBYTE()
Definition: wrjpgcom.c:79
static void copy_variable(void)
Definition: wrjpgcom.c:245
#define M_SOF3
Definition: wrjpgcom.c:161
#define WRITE_BINARY
Definition: wrjpgcom.c:47
#define M_SOF13
Definition: wrjpgcom.c:168
static unsigned int read_2_bytes(void)
Definition: wrjpgcom.c:106
#define M_SOF10
Definition: wrjpgcom.c:166
static int scan_JPEG_header(int keep_COM)
Definition: wrjpgcom.c:290
#define M_SOF1
Definition: wrjpgcom.c:159
static void write_1_byte(int c)
Definition: wrjpgcom.c:123
static int keymatch(char *arg, const char *keyword, int minchars)
Definition: wrjpgcom.c:385
#define M_SOI
Definition: wrjpgcom.c:171
#define M_SOF5
Definition: wrjpgcom.c:162
static const char * progname
Definition: wrjpgcom.c:348
static void usage(void)
Definition: wrjpgcom.c:352
static int read_1_byte(void)
Definition: wrjpgcom.c:93
#define M_SOF14
Definition: wrjpgcom.c:169
static FILE * outfile
Definition: wrjpgcom.c:81
#define M_SOF0
Definition: wrjpgcom.c:158
static int first_marker(void)
Definition: wrjpgcom.c:223
void * malloc()
static void write_2_bytes(unsigned int val)
Definition: wrjpgcom.c:129
static int next_marker(void)
Definition: wrjpgcom.c:188
#define M_COM
Definition: wrjpgcom.c:174
#define M_SOF2
Definition: wrjpgcom.c:160
static FILE * infile
Definition: wrjpgcom.c:76
#define M_SOS
Definition: wrjpgcom.c:173