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authorDavid Walter Seikel2013-01-13 18:54:10 +1000
committerDavid Walter Seikel2013-01-13 18:54:10 +1000
commit959831f4ef5a3e797f576c3de08cd65032c997ad (patch)
treee7351908be5995f0b325b2ebeaa02d5a34b82583 /libraries/irrlicht-1.8/source/Irrlicht/jpeglib/rdjpgcom.c
parentAdd info about changes to Irrlicht. (diff)
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Remove damned ancient DOS line endings from Irrlicht. Hopefully I did not go overboard.
Diffstat (limited to 'libraries/irrlicht-1.8/source/Irrlicht/jpeglib/rdjpgcom.c')
-rw-r--r--libraries/irrlicht-1.8/source/Irrlicht/jpeglib/rdjpgcom.c1030
1 files changed, 515 insertions, 515 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/rdjpgcom.c b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/rdjpgcom.c
index ab09b44..3719154 100644
--- a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/rdjpgcom.c
+++ b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/rdjpgcom.c
@@ -1,515 +1,515 @@
1/* 1/*
2 * rdjpgcom.c 2 * rdjpgcom.c
3 * 3 *
4 * Copyright (C) 1994-1997, Thomas G. Lane. 4 * Copyright (C) 1994-1997, Thomas G. Lane.
5 * Modified 2009 by Bill Allombert, Guido Vollbeding. 5 * Modified 2009 by Bill Allombert, Guido Vollbeding.
6 * This file is part of the Independent JPEG Group's software. 6 * This file is part of the Independent JPEG Group's software.
7 * For conditions of distribution and use, see the accompanying README file. 7 * For conditions of distribution and use, see the accompanying README file.
8 * 8 *
9 * This file contains a very simple stand-alone application that displays 9 * This file contains a very simple stand-alone application that displays
10 * the text in COM (comment) markers in a JFIF file. 10 * the text in COM (comment) markers in a JFIF file.
11 * This may be useful as an example of the minimum logic needed to parse 11 * This may be useful as an example of the minimum logic needed to parse
12 * JPEG markers. 12 * JPEG markers.
13 */ 13 */
14 14
15#define JPEG_CJPEG_DJPEG /* to get the command-line config symbols */ 15#define JPEG_CJPEG_DJPEG /* to get the command-line config symbols */
16#include "jinclude.h" /* get auto-config symbols, <stdio.h> */ 16#include "jinclude.h" /* get auto-config symbols, <stdio.h> */
17 17
18#ifdef HAVE_LOCALE_H 18#ifdef HAVE_LOCALE_H
19#include <locale.h> /* Bill Allombert: use locale for isprint */ 19#include <locale.h> /* Bill Allombert: use locale for isprint */
20#endif 20#endif
21#include <ctype.h> /* to declare isupper(), tolower() */ 21#include <ctype.h> /* to declare isupper(), tolower() */
22#ifdef USE_SETMODE 22#ifdef USE_SETMODE
23#include <fcntl.h> /* to declare setmode()'s parameter macros */ 23#include <fcntl.h> /* to declare setmode()'s parameter macros */
24/* If you have setmode() but not <io.h>, just delete this line: */ 24/* If you have setmode() but not <io.h>, just delete this line: */
25#include <io.h> /* to declare setmode() */ 25#include <io.h> /* to declare setmode() */
26#endif 26#endif
27 27
28#ifdef USE_CCOMMAND /* command-line reader for Macintosh */ 28#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
29#ifdef __MWERKS__ 29#ifdef __MWERKS__
30#include <SIOUX.h> /* Metrowerks needs this */ 30#include <SIOUX.h> /* Metrowerks needs this */
31#include <console.h> /* ... and this */ 31#include <console.h> /* ... and this */
32#endif 32#endif
33#ifdef THINK_C 33#ifdef THINK_C
34#include <console.h> /* Think declares it here */ 34#include <console.h> /* Think declares it here */
35#endif 35#endif
36#endif 36#endif
37 37
38#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */ 38#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
39#define READ_BINARY "r" 39#define READ_BINARY "r"
40#else 40#else
41#ifdef VMS /* VMS is very nonstandard */ 41#ifdef VMS /* VMS is very nonstandard */
42#define READ_BINARY "rb", "ctx=stm" 42#define READ_BINARY "rb", "ctx=stm"
43#else /* standard ANSI-compliant case */ 43#else /* standard ANSI-compliant case */
44#define READ_BINARY "rb" 44#define READ_BINARY "rb"
45#endif 45#endif
46#endif 46#endif
47 47
48#ifndef EXIT_FAILURE /* define exit() codes if not provided */ 48#ifndef EXIT_FAILURE /* define exit() codes if not provided */
49#define EXIT_FAILURE 1 49#define EXIT_FAILURE 1
50#endif 50#endif
51#ifndef EXIT_SUCCESS 51#ifndef EXIT_SUCCESS
52#ifdef VMS 52#ifdef VMS
53#define EXIT_SUCCESS 1 /* VMS is very nonstandard */ 53#define EXIT_SUCCESS 1 /* VMS is very nonstandard */
54#else 54#else
55#define EXIT_SUCCESS 0 55#define EXIT_SUCCESS 0
56#endif 56#endif
57#endif 57#endif
58 58
59 59
60/* 60/*
61 * These macros are used to read the input file. 61 * These macros are used to read the input file.
62 * To reuse this code in another application, you might need to change these. 62 * To reuse this code in another application, you might need to change these.
63 */ 63 */
64 64
65static FILE * infile; /* input JPEG file */ 65static FILE * infile; /* input JPEG file */
66 66
67/* Return next input byte, or EOF if no more */ 67/* Return next input byte, or EOF if no more */
68#define NEXTBYTE() getc(infile) 68#define NEXTBYTE() getc(infile)
69 69
70 70
71/* Error exit handler */ 71/* Error exit handler */
72#define ERREXIT(msg) (fprintf(stderr, "%s\n", msg), exit(EXIT_FAILURE)) 72#define ERREXIT(msg) (fprintf(stderr, "%s\n", msg), exit(EXIT_FAILURE))
73 73
74 74
75/* Read one byte, testing for EOF */ 75/* Read one byte, testing for EOF */
76static int 76static int
77read_1_byte (void) 77read_1_byte (void)
78{ 78{
79 int c; 79 int c;
80 80
81 c = NEXTBYTE(); 81 c = NEXTBYTE();
82 if (c == EOF) 82 if (c == EOF)
83 ERREXIT("Premature EOF in JPEG file"); 83 ERREXIT("Premature EOF in JPEG file");
84 return c; 84 return c;
85} 85}
86 86
87/* Read 2 bytes, convert to unsigned int */ 87/* Read 2 bytes, convert to unsigned int */
88/* All 2-byte quantities in JPEG markers are MSB first */ 88/* All 2-byte quantities in JPEG markers are MSB first */
89static unsigned int 89static unsigned int
90read_2_bytes (void) 90read_2_bytes (void)
91{ 91{
92 int c1, c2; 92 int c1, c2;
93 93
94 c1 = NEXTBYTE(); 94 c1 = NEXTBYTE();
95 if (c1 == EOF) 95 if (c1 == EOF)
96 ERREXIT("Premature EOF in JPEG file"); 96 ERREXIT("Premature EOF in JPEG file");
97 c2 = NEXTBYTE(); 97 c2 = NEXTBYTE();
98 if (c2 == EOF) 98 if (c2 == EOF)
99 ERREXIT("Premature EOF in JPEG file"); 99 ERREXIT("Premature EOF in JPEG file");
100 return (((unsigned int) c1) << 8) + ((unsigned int) c2); 100 return (((unsigned int) c1) << 8) + ((unsigned int) c2);
101} 101}
102 102
103 103
104/* 104/*
105 * JPEG markers consist of one or more 0xFF bytes, followed by a marker 105 * JPEG markers consist of one or more 0xFF bytes, followed by a marker
106 * code byte (which is not an FF). Here are the marker codes of interest 106 * code byte (which is not an FF). Here are the marker codes of interest
107 * in this program. (See jdmarker.c for a more complete list.) 107 * in this program. (See jdmarker.c for a more complete list.)
108 */ 108 */
109 109
110#define M_SOF0 0xC0 /* Start Of Frame N */ 110#define M_SOF0 0xC0 /* Start Of Frame N */
111#define M_SOF1 0xC1 /* N indicates which compression process */ 111#define M_SOF1 0xC1 /* N indicates which compression process */
112#define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */ 112#define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */
113#define M_SOF3 0xC3 113#define M_SOF3 0xC3
114#define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */ 114#define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */
115#define M_SOF6 0xC6 115#define M_SOF6 0xC6
116#define M_SOF7 0xC7 116#define M_SOF7 0xC7
117#define M_SOF9 0xC9 117#define M_SOF9 0xC9
118#define M_SOF10 0xCA 118#define M_SOF10 0xCA
119#define M_SOF11 0xCB 119#define M_SOF11 0xCB
120#define M_SOF13 0xCD 120#define M_SOF13 0xCD
121#define M_SOF14 0xCE 121#define M_SOF14 0xCE
122#define M_SOF15 0xCF 122#define M_SOF15 0xCF
123#define M_SOI 0xD8 /* Start Of Image (beginning of datastream) */ 123#define M_SOI 0xD8 /* Start Of Image (beginning of datastream) */
124#define M_EOI 0xD9 /* End Of Image (end of datastream) */ 124#define M_EOI 0xD9 /* End Of Image (end of datastream) */
125#define M_SOS 0xDA /* Start Of Scan (begins compressed data) */ 125#define M_SOS 0xDA /* Start Of Scan (begins compressed data) */
126#define M_APP0 0xE0 /* Application-specific marker, type N */ 126#define M_APP0 0xE0 /* Application-specific marker, type N */
127#define M_APP12 0xEC /* (we don't bother to list all 16 APPn's) */ 127#define M_APP12 0xEC /* (we don't bother to list all 16 APPn's) */
128#define M_COM 0xFE /* COMment */ 128#define M_COM 0xFE /* COMment */
129 129
130 130
131/* 131/*
132 * Find the next JPEG marker and return its marker code. 132 * Find the next JPEG marker and return its marker code.
133 * We expect at least one FF byte, possibly more if the compressor used FFs 133 * We expect at least one FF byte, possibly more if the compressor used FFs
134 * to pad the file. 134 * to pad the file.
135 * There could also be non-FF garbage between markers. The treatment of such 135 * There could also be non-FF garbage between markers. The treatment of such
136 * garbage is unspecified; we choose to skip over it but emit a warning msg. 136 * garbage is unspecified; we choose to skip over it but emit a warning msg.
137 * NB: this routine must not be used after seeing SOS marker, since it will 137 * NB: this routine must not be used after seeing SOS marker, since it will
138 * not deal correctly with FF/00 sequences in the compressed image data... 138 * not deal correctly with FF/00 sequences in the compressed image data...
139 */ 139 */
140 140
141static int 141static int
142next_marker (void) 142next_marker (void)
143{ 143{
144 int c; 144 int c;
145 int discarded_bytes = 0; 145 int discarded_bytes = 0;
146 146
147 /* Find 0xFF byte; count and skip any non-FFs. */ 147 /* Find 0xFF byte; count and skip any non-FFs. */
148 c = read_1_byte(); 148 c = read_1_byte();
149 while (c != 0xFF) { 149 while (c != 0xFF) {
150 discarded_bytes++; 150 discarded_bytes++;
151 c = read_1_byte(); 151 c = read_1_byte();
152 } 152 }
153 /* Get marker code byte, swallowing any duplicate FF bytes. Extra FFs 153 /* Get marker code byte, swallowing any duplicate FF bytes. Extra FFs
154 * are legal as pad bytes, so don't count them in discarded_bytes. 154 * are legal as pad bytes, so don't count them in discarded_bytes.
155 */ 155 */
156 do { 156 do {
157 c = read_1_byte(); 157 c = read_1_byte();
158 } while (c == 0xFF); 158 } while (c == 0xFF);
159 159
160 if (discarded_bytes != 0) { 160 if (discarded_bytes != 0) {
161 fprintf(stderr, "Warning: garbage data found in JPEG file\n"); 161 fprintf(stderr, "Warning: garbage data found in JPEG file\n");
162 } 162 }
163 163
164 return c; 164 return c;
165} 165}
166 166
167 167
168/* 168/*
169 * Read the initial marker, which should be SOI. 169 * Read the initial marker, which should be SOI.
170 * For a JFIF file, the first two bytes of the file should be literally 170 * For a JFIF file, the first two bytes of the file should be literally
171 * 0xFF M_SOI. To be more general, we could use next_marker, but if the 171 * 0xFF M_SOI. To be more general, we could use next_marker, but if the
172 * input file weren't actually JPEG at all, next_marker might read the whole 172 * input file weren't actually JPEG at all, next_marker might read the whole
173 * file and then return a misleading error message... 173 * file and then return a misleading error message...
174 */ 174 */
175 175
176static int 176static int
177first_marker (void) 177first_marker (void)
178{ 178{
179 int c1, c2; 179 int c1, c2;
180 180
181 c1 = NEXTBYTE(); 181 c1 = NEXTBYTE();
182 c2 = NEXTBYTE(); 182 c2 = NEXTBYTE();
183 if (c1 != 0xFF || c2 != M_SOI) 183 if (c1 != 0xFF || c2 != M_SOI)
184 ERREXIT("Not a JPEG file"); 184 ERREXIT("Not a JPEG file");
185 return c2; 185 return c2;
186} 186}
187 187
188 188
189/* 189/*
190 * Most types of marker are followed by a variable-length parameter segment. 190 * Most types of marker are followed by a variable-length parameter segment.
191 * This routine skips over the parameters for any marker we don't otherwise 191 * This routine skips over the parameters for any marker we don't otherwise
192 * want to process. 192 * want to process.
193 * Note that we MUST skip the parameter segment explicitly in order not to 193 * Note that we MUST skip the parameter segment explicitly in order not to
194 * be fooled by 0xFF bytes that might appear within the parameter segment; 194 * be fooled by 0xFF bytes that might appear within the parameter segment;
195 * such bytes do NOT introduce new markers. 195 * such bytes do NOT introduce new markers.
196 */ 196 */
197 197
198static void 198static void
199skip_variable (void) 199skip_variable (void)
200/* Skip over an unknown or uninteresting variable-length marker */ 200/* Skip over an unknown or uninteresting variable-length marker */
201{ 201{
202 unsigned int length; 202 unsigned int length;
203 203
204 /* Get the marker parameter length count */ 204 /* Get the marker parameter length count */
205 length = read_2_bytes(); 205 length = read_2_bytes();
206 /* Length includes itself, so must be at least 2 */ 206 /* Length includes itself, so must be at least 2 */
207 if (length < 2) 207 if (length < 2)
208 ERREXIT("Erroneous JPEG marker length"); 208 ERREXIT("Erroneous JPEG marker length");
209 length -= 2; 209 length -= 2;
210 /* Skip over the remaining bytes */ 210 /* Skip over the remaining bytes */
211 while (length > 0) { 211 while (length > 0) {
212 (void) read_1_byte(); 212 (void) read_1_byte();
213 length--; 213 length--;
214 } 214 }
215} 215}
216 216
217 217
218/* 218/*
219 * Process a COM marker. 219 * Process a COM marker.
220 * We want to print out the marker contents as legible text; 220 * We want to print out the marker contents as legible text;
221 * we must guard against non-text junk and varying newline representations. 221 * we must guard against non-text junk and varying newline representations.
222 */ 222 */
223 223
224static void 224static void
225process_COM (int raw) 225process_COM (int raw)
226{ 226{
227 unsigned int length; 227 unsigned int length;
228 int ch; 228 int ch;
229 int lastch = 0; 229 int lastch = 0;
230 230
231 /* Bill Allombert: set locale properly for isprint */ 231 /* Bill Allombert: set locale properly for isprint */
232#ifdef HAVE_LOCALE_H 232#ifdef HAVE_LOCALE_H
233 setlocale(LC_CTYPE, ""); 233 setlocale(LC_CTYPE, "");
234#endif 234#endif
235 235
236 /* Get the marker parameter length count */ 236 /* Get the marker parameter length count */
237 length = read_2_bytes(); 237 length = read_2_bytes();
238 /* Length includes itself, so must be at least 2 */ 238 /* Length includes itself, so must be at least 2 */
239 if (length < 2) 239 if (length < 2)
240 ERREXIT("Erroneous JPEG marker length"); 240 ERREXIT("Erroneous JPEG marker length");
241 length -= 2; 241 length -= 2;
242 242
243 while (length > 0) { 243 while (length > 0) {
244 ch = read_1_byte(); 244 ch = read_1_byte();
245 if (raw) { 245 if (raw) {
246 putc(ch, stdout); 246 putc(ch, stdout);
247 /* Emit the character in a readable form. 247 /* Emit the character in a readable form.
248 * Nonprintables are converted to \nnn form, 248 * Nonprintables are converted to \nnn form,
249 * while \ is converted to \\. 249 * while \ is converted to \\.
250 * Newlines in CR, CR/LF, or LF form will be printed as one newline. 250 * Newlines in CR, CR/LF, or LF form will be printed as one newline.
251 */ 251 */
252 } else if (ch == '\r') { 252 } else if (ch == '\r') {
253 printf("\n"); 253 printf("\n");
254 } else if (ch == '\n') { 254 } else if (ch == '\n') {
255 if (lastch != '\r') 255 if (lastch != '\r')
256 printf("\n"); 256 printf("\n");
257 } else if (ch == '\\') { 257 } else if (ch == '\\') {
258 printf("\\\\"); 258 printf("\\\\");
259 } else if (isprint(ch)) { 259 } else if (isprint(ch)) {
260 putc(ch, stdout); 260 putc(ch, stdout);
261 } else { 261 } else {
262 printf("\\%03o", ch); 262 printf("\\%03o", ch);
263 } 263 }
264 lastch = ch; 264 lastch = ch;
265 length--; 265 length--;
266 } 266 }
267 printf("\n"); 267 printf("\n");
268 268
269 /* Bill Allombert: revert to C locale */ 269 /* Bill Allombert: revert to C locale */
270#ifdef HAVE_LOCALE_H 270#ifdef HAVE_LOCALE_H
271 setlocale(LC_CTYPE, "C"); 271 setlocale(LC_CTYPE, "C");
272#endif 272#endif
273} 273}
274 274
275 275
276/* 276/*
277 * Process a SOFn marker. 277 * Process a SOFn marker.
278 * This code is only needed if you want to know the image dimensions... 278 * This code is only needed if you want to know the image dimensions...
279 */ 279 */
280 280
281static void 281static void
282process_SOFn (int marker) 282process_SOFn (int marker)
283{ 283{
284 unsigned int length; 284 unsigned int length;
285 unsigned int image_height, image_width; 285 unsigned int image_height, image_width;
286 int data_precision, num_components; 286 int data_precision, num_components;
287 const char * process; 287 const char * process;
288 int ci; 288 int ci;
289 289
290 length = read_2_bytes(); /* usual parameter length count */ 290 length = read_2_bytes(); /* usual parameter length count */
291 291
292 data_precision = read_1_byte(); 292 data_precision = read_1_byte();
293 image_height = read_2_bytes(); 293 image_height = read_2_bytes();
294 image_width = read_2_bytes(); 294 image_width = read_2_bytes();
295 num_components = read_1_byte(); 295 num_components = read_1_byte();
296 296
297 switch (marker) { 297 switch (marker) {
298 case M_SOF0: process = "Baseline"; break; 298 case M_SOF0: process = "Baseline"; break;
299 case M_SOF1: process = "Extended sequential"; break; 299 case M_SOF1: process = "Extended sequential"; break;
300 case M_SOF2: process = "Progressive"; break; 300 case M_SOF2: process = "Progressive"; break;
301 case M_SOF3: process = "Lossless"; break; 301 case M_SOF3: process = "Lossless"; break;
302 case M_SOF5: process = "Differential sequential"; break; 302 case M_SOF5: process = "Differential sequential"; break;
303 case M_SOF6: process = "Differential progressive"; break; 303 case M_SOF6: process = "Differential progressive"; break;
304 case M_SOF7: process = "Differential lossless"; break; 304 case M_SOF7: process = "Differential lossless"; break;
305 case M_SOF9: process = "Extended sequential, arithmetic coding"; break; 305 case M_SOF9: process = "Extended sequential, arithmetic coding"; break;
306 case M_SOF10: process = "Progressive, arithmetic coding"; break; 306 case M_SOF10: process = "Progressive, arithmetic coding"; break;
307 case M_SOF11: process = "Lossless, arithmetic coding"; break; 307 case M_SOF11: process = "Lossless, arithmetic coding"; break;
308 case M_SOF13: process = "Differential sequential, arithmetic coding"; break; 308 case M_SOF13: process = "Differential sequential, arithmetic coding"; break;
309 case M_SOF14: process = "Differential progressive, arithmetic coding"; break; 309 case M_SOF14: process = "Differential progressive, arithmetic coding"; break;
310 case M_SOF15: process = "Differential lossless, arithmetic coding"; break; 310 case M_SOF15: process = "Differential lossless, arithmetic coding"; break;
311 default: process = "Unknown"; break; 311 default: process = "Unknown"; break;
312 } 312 }
313 313
314 printf("JPEG image is %uw * %uh, %d color components, %d bits per sample\n", 314 printf("JPEG image is %uw * %uh, %d color components, %d bits per sample\n",
315 image_width, image_height, num_components, data_precision); 315 image_width, image_height, num_components, data_precision);
316 printf("JPEG process: %s\n", process); 316 printf("JPEG process: %s\n", process);
317 317
318 if (length != (unsigned int) (8 + num_components * 3)) 318 if (length != (unsigned int) (8 + num_components * 3))
319 ERREXIT("Bogus SOF marker length"); 319 ERREXIT("Bogus SOF marker length");
320 320
321 for (ci = 0; ci < num_components; ci++) { 321 for (ci = 0; ci < num_components; ci++) {
322 (void) read_1_byte(); /* Component ID code */ 322 (void) read_1_byte(); /* Component ID code */
323 (void) read_1_byte(); /* H, V sampling factors */ 323 (void) read_1_byte(); /* H, V sampling factors */
324 (void) read_1_byte(); /* Quantization table number */ 324 (void) read_1_byte(); /* Quantization table number */
325 } 325 }
326} 326}
327 327
328 328
329/* 329/*
330 * Parse the marker stream until SOS or EOI is seen; 330 * Parse the marker stream until SOS or EOI is seen;
331 * display any COM markers. 331 * display any COM markers.
332 * While the companion program wrjpgcom will always insert COM markers before 332 * While the companion program wrjpgcom will always insert COM markers before
333 * SOFn, other implementations might not, so we scan to SOS before stopping. 333 * SOFn, other implementations might not, so we scan to SOS before stopping.
334 * If we were only interested in the image dimensions, we would stop at SOFn. 334 * If we were only interested in the image dimensions, we would stop at SOFn.
335 * (Conversely, if we only cared about COM markers, there would be no need 335 * (Conversely, if we only cared about COM markers, there would be no need
336 * for special code to handle SOFn; we could treat it like other markers.) 336 * for special code to handle SOFn; we could treat it like other markers.)
337 */ 337 */
338 338
339static int 339static int
340scan_JPEG_header (int verbose, int raw) 340scan_JPEG_header (int verbose, int raw)
341{ 341{
342 int marker; 342 int marker;
343 343
344 /* Expect SOI at start of file */ 344 /* Expect SOI at start of file */
345 if (first_marker() != M_SOI) 345 if (first_marker() != M_SOI)
346 ERREXIT("Expected SOI marker first"); 346 ERREXIT("Expected SOI marker first");
347 347
348 /* Scan miscellaneous markers until we reach SOS. */ 348 /* Scan miscellaneous markers until we reach SOS. */
349 for (;;) { 349 for (;;) {
350 marker = next_marker(); 350 marker = next_marker();
351 switch (marker) { 351 switch (marker) {
352 /* Note that marker codes 0xC4, 0xC8, 0xCC are not, and must not be, 352 /* Note that marker codes 0xC4, 0xC8, 0xCC are not, and must not be,
353 * treated as SOFn. C4 in particular is actually DHT. 353 * treated as SOFn. C4 in particular is actually DHT.
354 */ 354 */
355 case M_SOF0: /* Baseline */ 355 case M_SOF0: /* Baseline */
356 case M_SOF1: /* Extended sequential, Huffman */ 356 case M_SOF1: /* Extended sequential, Huffman */
357 case M_SOF2: /* Progressive, Huffman */ 357 case M_SOF2: /* Progressive, Huffman */
358 case M_SOF3: /* Lossless, Huffman */ 358 case M_SOF3: /* Lossless, Huffman */
359 case M_SOF5: /* Differential sequential, Huffman */ 359 case M_SOF5: /* Differential sequential, Huffman */
360 case M_SOF6: /* Differential progressive, Huffman */ 360 case M_SOF6: /* Differential progressive, Huffman */
361 case M_SOF7: /* Differential lossless, Huffman */ 361 case M_SOF7: /* Differential lossless, Huffman */
362 case M_SOF9: /* Extended sequential, arithmetic */ 362 case M_SOF9: /* Extended sequential, arithmetic */
363 case M_SOF10: /* Progressive, arithmetic */ 363 case M_SOF10: /* Progressive, arithmetic */
364 case M_SOF11: /* Lossless, arithmetic */ 364 case M_SOF11: /* Lossless, arithmetic */
365 case M_SOF13: /* Differential sequential, arithmetic */ 365 case M_SOF13: /* Differential sequential, arithmetic */
366 case M_SOF14: /* Differential progressive, arithmetic */ 366 case M_SOF14: /* Differential progressive, arithmetic */
367 case M_SOF15: /* Differential lossless, arithmetic */ 367 case M_SOF15: /* Differential lossless, arithmetic */
368 if (verbose) 368 if (verbose)
369 process_SOFn(marker); 369 process_SOFn(marker);
370 else 370 else
371 skip_variable(); 371 skip_variable();
372 break; 372 break;
373 373
374 case M_SOS: /* stop before hitting compressed data */ 374 case M_SOS: /* stop before hitting compressed data */
375 return marker; 375 return marker;
376 376
377 case M_EOI: /* in case it's a tables-only JPEG stream */ 377 case M_EOI: /* in case it's a tables-only JPEG stream */
378 return marker; 378 return marker;
379 379
380 case M_COM: 380 case M_COM:
381 process_COM(raw); 381 process_COM(raw);
382 break; 382 break;
383 383
384 case M_APP12: 384 case M_APP12:
385 /* Some digital camera makers put useful textual information into 385 /* Some digital camera makers put useful textual information into
386 * APP12 markers, so we print those out too when in -verbose mode. 386 * APP12 markers, so we print those out too when in -verbose mode.
387 */ 387 */
388 if (verbose) { 388 if (verbose) {
389 printf("APP12 contains:\n"); 389 printf("APP12 contains:\n");
390 process_COM(raw); 390 process_COM(raw);
391 } else 391 } else
392 skip_variable(); 392 skip_variable();
393 break; 393 break;
394 394
395 default: /* Anything else just gets skipped */ 395 default: /* Anything else just gets skipped */
396 skip_variable(); /* we assume it has a parameter count... */ 396 skip_variable(); /* we assume it has a parameter count... */
397 break; 397 break;
398 } 398 }
399 } /* end loop */ 399 } /* end loop */
400} 400}
401 401
402 402
403/* Command line parsing code */ 403/* Command line parsing code */
404 404
405static const char * progname; /* program name for error messages */ 405static const char * progname; /* program name for error messages */
406 406
407 407
408static void 408static void
409usage (void) 409usage (void)
410/* complain about bad command line */ 410/* complain about bad command line */
411{ 411{
412 fprintf(stderr, "rdjpgcom displays any textual comments in a JPEG file.\n"); 412 fprintf(stderr, "rdjpgcom displays any textual comments in a JPEG file.\n");
413 413
414 fprintf(stderr, "Usage: %s [switches] [inputfile]\n", progname); 414 fprintf(stderr, "Usage: %s [switches] [inputfile]\n", progname);
415 415
416 fprintf(stderr, "Switches (names may be abbreviated):\n"); 416 fprintf(stderr, "Switches (names may be abbreviated):\n");
417 fprintf(stderr, " -raw Display non-printable characters in comments (unsafe)\n"); 417 fprintf(stderr, " -raw Display non-printable characters in comments (unsafe)\n");
418 fprintf(stderr, " -verbose Also display dimensions of JPEG image\n"); 418 fprintf(stderr, " -verbose Also display dimensions of JPEG image\n");
419 419
420 exit(EXIT_FAILURE); 420 exit(EXIT_FAILURE);
421} 421}
422 422
423 423
424static int 424static int
425keymatch (char * arg, const char * keyword, int minchars) 425keymatch (char * arg, const char * keyword, int minchars)
426/* Case-insensitive matching of (possibly abbreviated) keyword switches. */ 426/* Case-insensitive matching of (possibly abbreviated) keyword switches. */
427/* keyword is the constant keyword (must be lower case already), */ 427/* keyword is the constant keyword (must be lower case already), */
428/* minchars is length of minimum legal abbreviation. */ 428/* minchars is length of minimum legal abbreviation. */
429{ 429{
430 register int ca, ck; 430 register int ca, ck;
431 register int nmatched = 0; 431 register int nmatched = 0;
432 432
433 while ((ca = *arg++) != '\0') { 433 while ((ca = *arg++) != '\0') {
434 if ((ck = *keyword++) == '\0') 434 if ((ck = *keyword++) == '\0')
435 return 0; /* arg longer than keyword, no good */ 435 return 0; /* arg longer than keyword, no good */
436 if (isupper(ca)) /* force arg to lcase (assume ck is already) */ 436 if (isupper(ca)) /* force arg to lcase (assume ck is already) */
437 ca = tolower(ca); 437 ca = tolower(ca);
438 if (ca != ck) 438 if (ca != ck)
439 return 0; /* no good */ 439 return 0; /* no good */
440 nmatched++; /* count matched characters */ 440 nmatched++; /* count matched characters */
441 } 441 }
442 /* reached end of argument; fail if it's too short for unique abbrev */ 442 /* reached end of argument; fail if it's too short for unique abbrev */
443 if (nmatched < minchars) 443 if (nmatched < minchars)
444 return 0; 444 return 0;
445 return 1; /* A-OK */ 445 return 1; /* A-OK */
446} 446}
447 447
448 448
449/* 449/*
450 * The main program. 450 * The main program.
451 */ 451 */
452 452
453int 453int
454main (int argc, char **argv) 454main (int argc, char **argv)
455{ 455{
456 int argn; 456 int argn;
457 char * arg; 457 char * arg;
458 int verbose = 0, raw = 0; 458 int verbose = 0, raw = 0;
459 459
460 /* On Mac, fetch a command line. */ 460 /* On Mac, fetch a command line. */
461#ifdef USE_CCOMMAND 461#ifdef USE_CCOMMAND
462 argc = ccommand(&argv); 462 argc = ccommand(&argv);
463#endif 463#endif
464 464
465 progname = argv[0]; 465 progname = argv[0];
466 if (progname == NULL || progname[0] == 0) 466 if (progname == NULL || progname[0] == 0)
467 progname = "rdjpgcom"; /* in case C library doesn't provide it */ 467 progname = "rdjpgcom"; /* in case C library doesn't provide it */
468 468
469 /* Parse switches, if any */ 469 /* Parse switches, if any */
470 for (argn = 1; argn < argc; argn++) { 470 for (argn = 1; argn < argc; argn++) {
471 arg = argv[argn]; 471 arg = argv[argn];
472 if (arg[0] != '-') 472 if (arg[0] != '-')
473 break; /* not switch, must be file name */ 473 break; /* not switch, must be file name */
474 arg++; /* advance over '-' */ 474 arg++; /* advance over '-' */
475 if (keymatch(arg, "verbose", 1)) { 475 if (keymatch(arg, "verbose", 1)) {
476 verbose++; 476 verbose++;
477 } else if (keymatch(arg, "raw", 1)) { 477 } else if (keymatch(arg, "raw", 1)) {
478 raw = 1; 478 raw = 1;
479 } else 479 } else
480 usage(); 480 usage();
481 } 481 }
482 482
483 /* Open the input file. */ 483 /* Open the input file. */
484 /* Unix style: expect zero or one file name */ 484 /* Unix style: expect zero or one file name */
485 if (argn < argc-1) { 485 if (argn < argc-1) {
486 fprintf(stderr, "%s: only one input file\n", progname); 486 fprintf(stderr, "%s: only one input file\n", progname);
487 usage(); 487 usage();
488 } 488 }
489 if (argn < argc) { 489 if (argn < argc) {
490 if ((infile = fopen(argv[argn], READ_BINARY)) == NULL) { 490 if ((infile = fopen(argv[argn], READ_BINARY)) == NULL) {
491 fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]); 491 fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
492 exit(EXIT_FAILURE); 492 exit(EXIT_FAILURE);
493 } 493 }
494 } else { 494 } else {
495 /* default input file is stdin */ 495 /* default input file is stdin */
496#ifdef USE_SETMODE /* need to hack file mode? */ 496#ifdef USE_SETMODE /* need to hack file mode? */
497 setmode(fileno(stdin), O_BINARY); 497 setmode(fileno(stdin), O_BINARY);
498#endif 498#endif
499#ifdef USE_FDOPEN /* need to re-open in binary mode? */ 499#ifdef USE_FDOPEN /* need to re-open in binary mode? */
500 if ((infile = fdopen(fileno(stdin), READ_BINARY)) == NULL) { 500 if ((infile = fdopen(fileno(stdin), READ_BINARY)) == NULL) {
501 fprintf(stderr, "%s: can't open stdin\n", progname); 501 fprintf(stderr, "%s: can't open stdin\n", progname);
502 exit(EXIT_FAILURE); 502 exit(EXIT_FAILURE);
503 } 503 }
504#else 504#else
505 infile = stdin; 505 infile = stdin;
506#endif 506#endif
507 } 507 }
508 508
509 /* Scan the JPEG headers. */ 509 /* Scan the JPEG headers. */
510 (void) scan_JPEG_header(verbose, raw); 510 (void) scan_JPEG_header(verbose, raw);
511 511
512 /* All done. */ 512 /* All done. */
513 exit(EXIT_SUCCESS); 513 exit(EXIT_SUCCESS);
514 return 0; /* suppress no-return-value warnings */ 514 return 0; /* suppress no-return-value warnings */
515} 515}
generated by cgit v1.1 at 2024-08-31 11:45:05 +0000