ReactOS 0.4.15-dev-7887-g64a59a1
wrjpgcom.c File Reference
#include "jinclude.h"
#include <ctype.h>
Include dependency graph for wrjpgcom.c:

Go to the source code of this file.

Macros

#define JPEG_CJPEG_DJPEG   /* to get the command-line config symbols */
 
#define READ_BINARY   "rb"
 
#define WRITE_BINARY   "wb"
 
#define EXIT_FAILURE   1
 
#define EXIT_SUCCESS   0
 
#define MAX_COM_LENGTH   65000L /* must be <= 65533 in any case */
 
#define NEXTBYTE()   getc(infile)
 
#define PUTBYTE(x)   putc((x), outfile)
 
#define ERREXIT(msg)   (fprintf(stderr, "%s\n", msg), exit(EXIT_FAILURE))
 
#define M_SOF0   0xC0 /* Start Of Frame N */
 
#define M_SOF1   0xC1 /* N indicates which compression process */
 
#define M_SOF2   0xC2 /* Only SOF0-SOF2 are now in common use */
 
#define M_SOF3   0xC3
 
#define M_SOF5   0xC5 /* NB: codes C4 and CC are NOT SOF markers */
 
#define M_SOF6   0xC6
 
#define M_SOF7   0xC7
 
#define M_SOF9   0xC9
 
#define M_SOF10   0xCA
 
#define M_SOF11   0xCB
 
#define M_SOF13   0xCD
 
#define M_SOF14   0xCE
 
#define M_SOF15   0xCF
 
#define M_SOI   0xD8 /* Start Of Image (beginning of datastream) */
 
#define M_EOI   0xD9 /* End Of Image (end of datastream) */
 
#define M_SOS   0xDA /* Start Of Scan (begins compressed data) */
 
#define M_COM   0xFE /* COMment */
 

Functions

voidmalloc ()
 
static int read_1_byte (void)
 
static unsigned int read_2_bytes (void)
 
static void write_1_byte (int c)
 
static void write_2_bytes (unsigned int val)
 
static void write_marker (int marker)
 
static void copy_rest_of_file (void)
 
static int next_marker (void)
 
static int first_marker (void)
 
static void copy_variable (void)
 
static void skip_variable (void)
 
static int scan_JPEG_header (int keep_COM)
 
static void usage (void)
 
static int keymatch (char *arg, const char *keyword, int minchars)
 
int main (int argc, char **argv)
 

Variables

static FILEinfile
 
static FILEoutfile
 
static const charprogname
 

Macro Definition Documentation

◆ ERREXIT

#define ERREXIT (   msg)    (fprintf(stderr, "%s\n", msg), exit(EXIT_FAILURE))

Definition at line 88 of file wrjpgcom.c.

◆ EXIT_FAILURE

#define EXIT_FAILURE   1

Definition at line 52 of file wrjpgcom.c.

◆ EXIT_SUCCESS

#define EXIT_SUCCESS   0

Definition at line 58 of file wrjpgcom.c.

◆ JPEG_CJPEG_DJPEG

#define JPEG_CJPEG_DJPEG   /* to get the command-line config symbols */

Definition at line 15 of file wrjpgcom.c.

◆ M_COM

#define M_COM   0xFE /* COMment */

Definition at line 174 of file wrjpgcom.c.

◆ M_EOI

#define M_EOI   0xD9 /* End Of Image (end of datastream) */

Definition at line 172 of file wrjpgcom.c.

◆ M_SOF0

#define M_SOF0   0xC0 /* Start Of Frame N */

Definition at line 158 of file wrjpgcom.c.

◆ M_SOF1

#define M_SOF1   0xC1 /* N indicates which compression process */

Definition at line 159 of file wrjpgcom.c.

◆ M_SOF10

#define M_SOF10   0xCA

Definition at line 166 of file wrjpgcom.c.

◆ M_SOF11

#define M_SOF11   0xCB

Definition at line 167 of file wrjpgcom.c.

◆ M_SOF13

#define M_SOF13   0xCD

Definition at line 168 of file wrjpgcom.c.

◆ M_SOF14

#define M_SOF14   0xCE

Definition at line 169 of file wrjpgcom.c.

◆ M_SOF15

#define M_SOF15   0xCF

Definition at line 170 of file wrjpgcom.c.

◆ M_SOF2

#define M_SOF2   0xC2 /* Only SOF0-SOF2 are now in common use */

Definition at line 160 of file wrjpgcom.c.

◆ M_SOF3

#define M_SOF3   0xC3

Definition at line 161 of file wrjpgcom.c.

◆ M_SOF5

#define M_SOF5   0xC5 /* NB: codes C4 and CC are NOT SOF markers */

Definition at line 162 of file wrjpgcom.c.

◆ M_SOF6

#define M_SOF6   0xC6

Definition at line 163 of file wrjpgcom.c.

◆ M_SOF7

#define M_SOF7   0xC7

Definition at line 164 of file wrjpgcom.c.

◆ M_SOF9

#define M_SOF9   0xC9

Definition at line 165 of file wrjpgcom.c.

◆ M_SOI

#define M_SOI   0xD8 /* Start Of Image (beginning of datastream) */

Definition at line 171 of file wrjpgcom.c.

◆ M_SOS

#define M_SOS   0xDA /* Start Of Scan (begins compressed data) */

Definition at line 173 of file wrjpgcom.c.

◆ MAX_COM_LENGTH

#define MAX_COM_LENGTH   65000L /* must be <= 65533 in any case */

Definition at line 67 of file wrjpgcom.c.

◆ NEXTBYTE

#define NEXTBYTE ( )    getc(infile)

Definition at line 79 of file wrjpgcom.c.

◆ PUTBYTE

#define PUTBYTE (   x)    putc((x), outfile)

Definition at line 84 of file wrjpgcom.c.

◆ READ_BINARY

#define READ_BINARY   "rb"

Definition at line 46 of file wrjpgcom.c.

◆ WRITE_BINARY

#define WRITE_BINARY   "wb"

Definition at line 47 of file wrjpgcom.c.

Function Documentation

◆ copy_rest_of_file()

static void copy_rest_of_file ( void  )
static

Definition at line 143 of file wrjpgcom.c.

144{
145 int c;
146
147 while ((c = NEXTBYTE()) != EOF)
148 PUTBYTE(c);
149}
const GLubyte * c
Definition: glext.h:8905
#define EOF
Definition: stdio.h:24
#define c
Definition: ke_i.h:80
#define PUTBYTE(x)
Definition: wrjpgcom.c:84
#define NEXTBYTE()
Definition: wrjpgcom.c:79

Referenced by main().

◆ copy_variable()

static void copy_variable ( void  )
static

Definition at line 245 of file wrjpgcom.c.

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}
GLuint GLsizei GLsizei * length
Definition: glext.h:6040
#define ERREXIT(msg)
Definition: wrjpgcom.c:88
static unsigned int read_2_bytes(void)
Definition: wrjpgcom.c:106
static void write_1_byte(int c)
Definition: wrjpgcom.c:123
static int read_1_byte(void)
Definition: wrjpgcom.c:93
static void write_2_bytes(unsigned int val)
Definition: wrjpgcom.c:129

Referenced by scan_JPEG_header().

◆ first_marker()

static int first_marker ( void  )
static

Definition at line 223 of file wrjpgcom.c.

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}
#define M_SOI
Definition: wrjpgcom.c:171

Referenced by scan_JPEG_header().

◆ keymatch()

static int keymatch ( char arg,
const char keyword,
int  minchars 
)
static

Definition at line 385 of file wrjpgcom.c.

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}
#define isupper(c)
Definition: acclib.h:71
int tolower(int c)
Definition: utclib.c:902
const char int minchars
Definition: cdjpeg.h:154
static const WCHAR ca[]
Definition: main.c:455

Referenced by main().

◆ main()

int main ( int argc  ,
char **  argv 
)

Definition at line 414 of file wrjpgcom.c.

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
char * strcpy(char *DstString, const char *SrcString)
Definition: utclib.c:388
#define fileno
Definition: acwin.h:102
#define O_BINARY
Definition: acwin.h:109
#define NULL
Definition: types.h:112
unsigned int(__cdecl typeof(jpeg_read_scanlines))(struct jpeg_decompress_struct *
Definition: typeof.h:31
unsigned char
Definition: typeof.h:29
#define stdout
Definition: stdio.h:99
_Check_return_ _CRTIMP int __cdecl getc(_Inout_ FILE *_File)
#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 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 EXIT_SUCCESS
Definition: wrjpgcom.c:58
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 WRITE_BINARY
Definition: wrjpgcom.c:47
static int scan_JPEG_header(int keep_COM)
Definition: wrjpgcom.c:290
static int keymatch(char *arg, const char *keyword, int minchars)
Definition: wrjpgcom.c:385
static const char * progname
Definition: wrjpgcom.c:348
static void usage(void)
Definition: wrjpgcom.c:352
static FILE * outfile
Definition: wrjpgcom.c:81
void * malloc()
#define M_COM
Definition: wrjpgcom.c:174
static FILE * infile
Definition: wrjpgcom.c:76

◆ malloc()

void * malloc ( )

Referenced by main().

◆ next_marker()

static int next_marker ( void  )
static

Definition at line 188 of file wrjpgcom.c.

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}

Referenced by scan_JPEG_header().

◆ read_1_byte()

static int read_1_byte ( void  )
static

Definition at line 93 of file wrjpgcom.c.

94{
95 int c;
96
97 c = NEXTBYTE();
98 if (c == EOF)
99 ERREXIT("Premature EOF in JPEG file");
100 return c;
101}

Referenced by copy_variable(), next_marker(), and skip_variable().

◆ read_2_bytes()

static unsigned int read_2_bytes ( void  )
static

Definition at line 106 of file wrjpgcom.c.

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}

Referenced by copy_variable(), and skip_variable().

◆ scan_JPEG_header()

static int scan_JPEG_header ( int  keep_COM)
static

Definition at line 290 of file wrjpgcom.c.

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}
#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
static void skip_variable(void)
Definition: wrjpgcom.c:265
#define M_SOF15
Definition: wrjpgcom.c:170
static void copy_variable(void)
Definition: wrjpgcom.c:245
#define M_SOF3
Definition: wrjpgcom.c:161
#define M_SOF13
Definition: wrjpgcom.c:168
#define M_SOF10
Definition: wrjpgcom.c:166
#define M_SOF1
Definition: wrjpgcom.c:159
#define M_SOF5
Definition: wrjpgcom.c:162
#define M_SOF14
Definition: wrjpgcom.c:169
#define M_SOF0
Definition: wrjpgcom.c:158
static int first_marker(void)
Definition: wrjpgcom.c:223
static int next_marker(void)
Definition: wrjpgcom.c:188
#define M_SOF2
Definition: wrjpgcom.c:160
#define M_SOS
Definition: wrjpgcom.c:173

Referenced by main().

◆ skip_variable()

static void skip_variable ( void  )
static

Definition at line 265 of file wrjpgcom.c.

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}

Referenced by scan_JPEG_header().

◆ usage()

static void usage ( void  )
static

Definition at line 352 of file wrjpgcom.c.

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}

Referenced by main().

◆ write_1_byte()

static void write_1_byte ( int  c)
static

Definition at line 123 of file wrjpgcom.c.

124{
125 PUTBYTE(c);
126}

Referenced by copy_variable(), and main().

◆ write_2_bytes()

static void write_2_bytes ( unsigned int  val)
static

Definition at line 129 of file wrjpgcom.c.

130{
131 PUTBYTE((val >> 8) & 0xFF);
132 PUTBYTE(val & 0xFF);
133}
GLuint GLfloat * val
Definition: glext.h:7180

Referenced by copy_variable(), and main().

◆ write_marker()

static void write_marker ( int  marker)
static

Definition at line 136 of file wrjpgcom.c.

137{
138 PUTBYTE(0xFF);
140}

Referenced by main(), and scan_JPEG_header().

Variable Documentation

◆ infile

FILE* infile
static

Definition at line 76 of file wrjpgcom.c.

Referenced by main().

◆ outfile

◆ progname

const char* progname
static

Definition at line 348 of file wrjpgcom.c.

Referenced by main(), and usage().