diff options
Diffstat (limited to 'libraries/irrlicht-1.8/source/Irrlicht/jpeglib/wrjpgcom.c')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/jpeglib/wrjpgcom.c | 1166 |
1 files changed, 583 insertions, 583 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/wrjpgcom.c b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/wrjpgcom.c index 7d10ee6..8c04b05 100644 --- a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/wrjpgcom.c +++ b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/wrjpgcom.c | |||
@@ -1,583 +1,583 @@ | |||
1 | /* | 1 | /* |
2 | * wrjpgcom.c | 2 | * wrjpgcom.c |
3 | * | 3 | * |
4 | * Copyright (C) 1994-1997, Thomas G. Lane. | 4 | * Copyright (C) 1994-1997, Thomas G. Lane. |
5 | * This file is part of the Independent JPEG Group's software. | 5 | * This file is part of the Independent JPEG Group's software. |
6 | * For conditions of distribution and use, see the accompanying README file. | 6 | * For conditions of distribution and use, see the accompanying README file. |
7 | * | 7 | * |
8 | * This file contains a very simple stand-alone application that inserts | 8 | * This file contains a very simple stand-alone application that inserts |
9 | * user-supplied text as a COM (comment) marker in a JFIF file. | 9 | * user-supplied text as a COM (comment) marker in a JFIF file. |
10 | * This may be useful as an example of the minimum logic needed to parse | 10 | * This may be useful as an example of the minimum logic needed to parse |
11 | * JPEG markers. | 11 | * JPEG markers. |
12 | */ | 12 | */ |
13 | 13 | ||
14 | #define JPEG_CJPEG_DJPEG /* to get the command-line config symbols */ | 14 | #define JPEG_CJPEG_DJPEG /* to get the command-line config symbols */ |
15 | #include "jinclude.h" /* get auto-config symbols, <stdio.h> */ | 15 | #include "jinclude.h" /* get auto-config symbols, <stdio.h> */ |
16 | 16 | ||
17 | #ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc() */ | 17 | #ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc() */ |
18 | extern void * malloc (); | 18 | extern void * malloc (); |
19 | #endif | 19 | #endif |
20 | #include <ctype.h> /* to declare isupper(), tolower() */ | 20 | #include <ctype.h> /* to declare isupper(), tolower() */ |
21 | #ifdef USE_SETMODE | 21 | #ifdef USE_SETMODE |
22 | #include <fcntl.h> /* to declare setmode()'s parameter macros */ | 22 | #include <fcntl.h> /* to declare setmode()'s parameter macros */ |
23 | /* If you have setmode() but not <io.h>, just delete this line: */ | 23 | /* If you have setmode() but not <io.h>, just delete this line: */ |
24 | #include <io.h> /* to declare setmode() */ | 24 | #include <io.h> /* to declare setmode() */ |
25 | #endif | 25 | #endif |
26 | 26 | ||
27 | #ifdef USE_CCOMMAND /* command-line reader for Macintosh */ | 27 | #ifdef USE_CCOMMAND /* command-line reader for Macintosh */ |
28 | #ifdef __MWERKS__ | 28 | #ifdef __MWERKS__ |
29 | #include <SIOUX.h> /* Metrowerks needs this */ | 29 | #include <SIOUX.h> /* Metrowerks needs this */ |
30 | #include <console.h> /* ... and this */ | 30 | #include <console.h> /* ... and this */ |
31 | #endif | 31 | #endif |
32 | #ifdef THINK_C | 32 | #ifdef THINK_C |
33 | #include <console.h> /* Think declares it here */ | 33 | #include <console.h> /* Think declares it here */ |
34 | #endif | 34 | #endif |
35 | #endif | 35 | #endif |
36 | 36 | ||
37 | #ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */ | 37 | #ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */ |
38 | #define READ_BINARY "r" | 38 | #define READ_BINARY "r" |
39 | #define WRITE_BINARY "w" | 39 | #define WRITE_BINARY "w" |
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 | #define WRITE_BINARY "wb", "ctx=stm" | 43 | #define WRITE_BINARY "wb", "ctx=stm" |
44 | #else /* standard ANSI-compliant case */ | 44 | #else /* standard ANSI-compliant case */ |
45 | #define READ_BINARY "rb" | 45 | #define READ_BINARY "rb" |
46 | #define WRITE_BINARY "wb" | 46 | #define WRITE_BINARY "wb" |
47 | #endif | 47 | #endif |
48 | #endif | 48 | #endif |
49 | 49 | ||
50 | #ifndef EXIT_FAILURE /* define exit() codes if not provided */ | 50 | #ifndef EXIT_FAILURE /* define exit() codes if not provided */ |
51 | #define EXIT_FAILURE 1 | 51 | #define EXIT_FAILURE 1 |
52 | #endif | 52 | #endif |
53 | #ifndef EXIT_SUCCESS | 53 | #ifndef EXIT_SUCCESS |
54 | #ifdef VMS | 54 | #ifdef VMS |
55 | #define EXIT_SUCCESS 1 /* VMS is very nonstandard */ | 55 | #define EXIT_SUCCESS 1 /* VMS is very nonstandard */ |
56 | #else | 56 | #else |
57 | #define EXIT_SUCCESS 0 | 57 | #define EXIT_SUCCESS 0 |
58 | #endif | 58 | #endif |
59 | #endif | 59 | #endif |
60 | 60 | ||
61 | /* Reduce this value if your malloc() can't allocate blocks up to 64K. | 61 | /* Reduce this value if your malloc() can't allocate blocks up to 64K. |
62 | * On DOS, compiling in large model is usually a better solution. | 62 | * On DOS, compiling in large model is usually a better solution. |
63 | */ | 63 | */ |
64 | 64 | ||
65 | #ifndef MAX_COM_LENGTH | 65 | #ifndef MAX_COM_LENGTH |
66 | #define MAX_COM_LENGTH 65000L /* must be <= 65533 in any case */ | 66 | #define MAX_COM_LENGTH 65000L /* must be <= 65533 in any case */ |
67 | #endif | 67 | #endif |
68 | 68 | ||
69 | 69 | ||
70 | /* | 70 | /* |
71 | * These macros are used to read the input file and write the output file. | 71 | * These macros are used to read the input file and write the output file. |
72 | * To reuse this code in another application, you might need to change these. | 72 | * To reuse this code in another application, you might need to change these. |
73 | */ | 73 | */ |
74 | 74 | ||
75 | static FILE * infile; /* input JPEG file */ | 75 | static FILE * infile; /* input JPEG file */ |
76 | 76 | ||
77 | /* Return next input byte, or EOF if no more */ | 77 | /* Return next input byte, or EOF if no more */ |
78 | #define NEXTBYTE() getc(infile) | 78 | #define NEXTBYTE() getc(infile) |
79 | 79 | ||
80 | static FILE * outfile; /* output JPEG file */ | 80 | static FILE * outfile; /* output JPEG file */ |
81 | 81 | ||
82 | /* Emit an output byte */ | 82 | /* Emit an output byte */ |
83 | #define PUTBYTE(x) putc((x), outfile) | 83 | #define PUTBYTE(x) putc((x), outfile) |
84 | 84 | ||
85 | 85 | ||
86 | /* Error exit handler */ | 86 | /* Error exit handler */ |
87 | #define ERREXIT(msg) (fprintf(stderr, "%s\n", msg), exit(EXIT_FAILURE)) | 87 | #define ERREXIT(msg) (fprintf(stderr, "%s\n", msg), exit(EXIT_FAILURE)) |
88 | 88 | ||
89 | 89 | ||
90 | /* Read one byte, testing for EOF */ | 90 | /* Read one byte, testing for EOF */ |
91 | static int | 91 | static int |
92 | read_1_byte (void) | 92 | read_1_byte (void) |
93 | { | 93 | { |
94 | int c; | 94 | int c; |
95 | 95 | ||
96 | c = NEXTBYTE(); | 96 | c = NEXTBYTE(); |
97 | if (c == EOF) | 97 | if (c == EOF) |
98 | ERREXIT("Premature EOF in JPEG file"); | 98 | ERREXIT("Premature EOF in JPEG file"); |
99 | return c; | 99 | return c; |
100 | } | 100 | } |
101 | 101 | ||
102 | /* Read 2 bytes, convert to unsigned int */ | 102 | /* Read 2 bytes, convert to unsigned int */ |
103 | /* All 2-byte quantities in JPEG markers are MSB first */ | 103 | /* All 2-byte quantities in JPEG markers are MSB first */ |
104 | static unsigned int | 104 | static unsigned int |
105 | read_2_bytes (void) | 105 | read_2_bytes (void) |
106 | { | 106 | { |
107 | int c1, c2; | 107 | int c1, c2; |
108 | 108 | ||
109 | c1 = NEXTBYTE(); | 109 | c1 = NEXTBYTE(); |
110 | if (c1 == EOF) | 110 | if (c1 == EOF) |
111 | ERREXIT("Premature EOF in JPEG file"); | 111 | ERREXIT("Premature EOF in JPEG file"); |
112 | c2 = NEXTBYTE(); | 112 | c2 = NEXTBYTE(); |
113 | if (c2 == EOF) | 113 | if (c2 == EOF) |
114 | ERREXIT("Premature EOF in JPEG file"); | 114 | ERREXIT("Premature EOF in JPEG file"); |
115 | return (((unsigned int) c1) << 8) + ((unsigned int) c2); | 115 | return (((unsigned int) c1) << 8) + ((unsigned int) c2); |
116 | } | 116 | } |
117 | 117 | ||
118 | 118 | ||
119 | /* Routines to write data to output file */ | 119 | /* Routines to write data to output file */ |
120 | 120 | ||
121 | static void | 121 | static void |
122 | write_1_byte (int c) | 122 | write_1_byte (int c) |
123 | { | 123 | { |
124 | PUTBYTE(c); | 124 | PUTBYTE(c); |
125 | } | 125 | } |
126 | 126 | ||
127 | static void | 127 | static void |
128 | write_2_bytes (unsigned int val) | 128 | write_2_bytes (unsigned int val) |
129 | { | 129 | { |
130 | PUTBYTE((val >> 8) & 0xFF); | 130 | PUTBYTE((val >> 8) & 0xFF); |
131 | PUTBYTE(val & 0xFF); | 131 | PUTBYTE(val & 0xFF); |
132 | } | 132 | } |
133 | 133 | ||
134 | static void | 134 | static void |
135 | write_marker (int marker) | 135 | write_marker (int marker) |
136 | { | 136 | { |
137 | PUTBYTE(0xFF); | 137 | PUTBYTE(0xFF); |
138 | PUTBYTE(marker); | 138 | PUTBYTE(marker); |
139 | } | 139 | } |
140 | 140 | ||
141 | static void | 141 | static void |
142 | copy_rest_of_file (void) | 142 | copy_rest_of_file (void) |
143 | { | 143 | { |
144 | int c; | 144 | int c; |
145 | 145 | ||
146 | while ((c = NEXTBYTE()) != EOF) | 146 | while ((c = NEXTBYTE()) != EOF) |
147 | PUTBYTE(c); | 147 | PUTBYTE(c); |
148 | } | 148 | } |
149 | 149 | ||
150 | 150 | ||
151 | /* | 151 | /* |
152 | * JPEG markers consist of one or more 0xFF bytes, followed by a marker | 152 | * JPEG markers consist of one or more 0xFF bytes, followed by a marker |
153 | * code byte (which is not an FF). Here are the marker codes of interest | 153 | * code byte (which is not an FF). Here are the marker codes of interest |
154 | * in this program. (See jdmarker.c for a more complete list.) | 154 | * in this program. (See jdmarker.c for a more complete list.) |
155 | */ | 155 | */ |
156 | 156 | ||
157 | #define M_SOF0 0xC0 /* Start Of Frame N */ | 157 | #define M_SOF0 0xC0 /* Start Of Frame N */ |
158 | #define M_SOF1 0xC1 /* N indicates which compression process */ | 158 | #define M_SOF1 0xC1 /* N indicates which compression process */ |
159 | #define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */ | 159 | #define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */ |
160 | #define M_SOF3 0xC3 | 160 | #define M_SOF3 0xC3 |
161 | #define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */ | 161 | #define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */ |
162 | #define M_SOF6 0xC6 | 162 | #define M_SOF6 0xC6 |
163 | #define M_SOF7 0xC7 | 163 | #define M_SOF7 0xC7 |
164 | #define M_SOF9 0xC9 | 164 | #define M_SOF9 0xC9 |
165 | #define M_SOF10 0xCA | 165 | #define M_SOF10 0xCA |
166 | #define M_SOF11 0xCB | 166 | #define M_SOF11 0xCB |
167 | #define M_SOF13 0xCD | 167 | #define M_SOF13 0xCD |
168 | #define M_SOF14 0xCE | 168 | #define M_SOF14 0xCE |
169 | #define M_SOF15 0xCF | 169 | #define M_SOF15 0xCF |
170 | #define M_SOI 0xD8 /* Start Of Image (beginning of datastream) */ | 170 | #define M_SOI 0xD8 /* Start Of Image (beginning of datastream) */ |
171 | #define M_EOI 0xD9 /* End Of Image (end of datastream) */ | 171 | #define M_EOI 0xD9 /* End Of Image (end of datastream) */ |
172 | #define M_SOS 0xDA /* Start Of Scan (begins compressed data) */ | 172 | #define M_SOS 0xDA /* Start Of Scan (begins compressed data) */ |
173 | #define M_COM 0xFE /* COMment */ | 173 | #define M_COM 0xFE /* COMment */ |
174 | 174 | ||
175 | 175 | ||
176 | /* | 176 | /* |
177 | * Find the next JPEG marker and return its marker code. | 177 | * Find the next JPEG marker and return its marker code. |
178 | * We expect at least one FF byte, possibly more if the compressor used FFs | 178 | * We expect at least one FF byte, possibly more if the compressor used FFs |
179 | * to pad the file. (Padding FFs will NOT be replicated in the output file.) | 179 | * to pad the file. (Padding FFs will NOT be replicated in the output file.) |
180 | * There could also be non-FF garbage between markers. The treatment of such | 180 | * There could also be non-FF garbage between markers. The treatment of such |
181 | * garbage is unspecified; we choose to skip over it but emit a warning msg. | 181 | * garbage is unspecified; we choose to skip over it but emit a warning msg. |
182 | * NB: this routine must not be used after seeing SOS marker, since it will | 182 | * NB: this routine must not be used after seeing SOS marker, since it will |
183 | * not deal correctly with FF/00 sequences in the compressed image data... | 183 | * not deal correctly with FF/00 sequences in the compressed image data... |
184 | */ | 184 | */ |
185 | 185 | ||
186 | static int | 186 | static int |
187 | next_marker (void) | 187 | next_marker (void) |
188 | { | 188 | { |
189 | int c; | 189 | int c; |
190 | int discarded_bytes = 0; | 190 | int discarded_bytes = 0; |
191 | 191 | ||
192 | /* Find 0xFF byte; count and skip any non-FFs. */ | 192 | /* Find 0xFF byte; count and skip any non-FFs. */ |
193 | c = read_1_byte(); | 193 | c = read_1_byte(); |
194 | while (c != 0xFF) { | 194 | while (c != 0xFF) { |
195 | discarded_bytes++; | 195 | discarded_bytes++; |
196 | c = read_1_byte(); | 196 | c = read_1_byte(); |
197 | } | 197 | } |
198 | /* Get marker code byte, swallowing any duplicate FF bytes. Extra FFs | 198 | /* Get marker code byte, swallowing any duplicate FF bytes. Extra FFs |
199 | * are legal as pad bytes, so don't count them in discarded_bytes. | 199 | * are legal as pad bytes, so don't count them in discarded_bytes. |
200 | */ | 200 | */ |
201 | do { | 201 | do { |
202 | c = read_1_byte(); | 202 | c = read_1_byte(); |
203 | } while (c == 0xFF); | 203 | } while (c == 0xFF); |
204 | 204 | ||
205 | if (discarded_bytes != 0) { | 205 | if (discarded_bytes != 0) { |
206 | fprintf(stderr, "Warning: garbage data found in JPEG file\n"); | 206 | fprintf(stderr, "Warning: garbage data found in JPEG file\n"); |
207 | } | 207 | } |
208 | 208 | ||
209 | return c; | 209 | return c; |
210 | } | 210 | } |
211 | 211 | ||
212 | 212 | ||
213 | /* | 213 | /* |
214 | * Read the initial marker, which should be SOI. | 214 | * Read the initial marker, which should be SOI. |
215 | * For a JFIF file, the first two bytes of the file should be literally | 215 | * For a JFIF file, the first two bytes of the file should be literally |
216 | * 0xFF M_SOI. To be more general, we could use next_marker, but if the | 216 | * 0xFF M_SOI. To be more general, we could use next_marker, but if the |
217 | * input file weren't actually JPEG at all, next_marker might read the whole | 217 | * input file weren't actually JPEG at all, next_marker might read the whole |
218 | * file and then return a misleading error message... | 218 | * file and then return a misleading error message... |
219 | */ | 219 | */ |
220 | 220 | ||
221 | static int | 221 | static int |
222 | first_marker (void) | 222 | first_marker (void) |
223 | { | 223 | { |
224 | int c1, c2; | 224 | int c1, c2; |
225 | 225 | ||
226 | c1 = NEXTBYTE(); | 226 | c1 = NEXTBYTE(); |
227 | c2 = NEXTBYTE(); | 227 | c2 = NEXTBYTE(); |
228 | if (c1 != 0xFF || c2 != M_SOI) | 228 | if (c1 != 0xFF || c2 != M_SOI) |
229 | ERREXIT("Not a JPEG file"); | 229 | ERREXIT("Not a JPEG file"); |
230 | return c2; | 230 | return c2; |
231 | } | 231 | } |
232 | 232 | ||
233 | 233 | ||
234 | /* | 234 | /* |
235 | * Most types of marker are followed by a variable-length parameter segment. | 235 | * Most types of marker are followed by a variable-length parameter segment. |
236 | * This routine skips over the parameters for any marker we don't otherwise | 236 | * This routine skips over the parameters for any marker we don't otherwise |
237 | * want to process. | 237 | * want to process. |
238 | * Note that we MUST skip the parameter segment explicitly in order not to | 238 | * Note that we MUST skip the parameter segment explicitly in order not to |
239 | * be fooled by 0xFF bytes that might appear within the parameter segment; | 239 | * be fooled by 0xFF bytes that might appear within the parameter segment; |
240 | * such bytes do NOT introduce new markers. | 240 | * such bytes do NOT introduce new markers. |
241 | */ | 241 | */ |
242 | 242 | ||
243 | static void | 243 | static void |
244 | copy_variable (void) | 244 | copy_variable (void) |
245 | /* Copy an unknown or uninteresting variable-length marker */ | 245 | /* Copy an unknown or uninteresting variable-length marker */ |
246 | { | 246 | { |
247 | unsigned int length; | 247 | unsigned int length; |
248 | 248 | ||
249 | /* Get the marker parameter length count */ | 249 | /* Get the marker parameter length count */ |
250 | length = read_2_bytes(); | 250 | length = read_2_bytes(); |
251 | write_2_bytes(length); | 251 | write_2_bytes(length); |
252 | /* Length includes itself, so must be at least 2 */ | 252 | /* Length includes itself, so must be at least 2 */ |
253 | if (length < 2) | 253 | if (length < 2) |
254 | ERREXIT("Erroneous JPEG marker length"); | 254 | ERREXIT("Erroneous JPEG marker length"); |
255 | length -= 2; | 255 | length -= 2; |
256 | /* Skip over the remaining bytes */ | 256 | /* Skip over the remaining bytes */ |
257 | while (length > 0) { | 257 | while (length > 0) { |
258 | write_1_byte(read_1_byte()); | 258 | write_1_byte(read_1_byte()); |
259 | length--; | 259 | length--; |
260 | } | 260 | } |
261 | } | 261 | } |
262 | 262 | ||
263 | static void | 263 | static void |
264 | skip_variable (void) | 264 | skip_variable (void) |
265 | /* Skip over an unknown or uninteresting variable-length marker */ | 265 | /* Skip over an unknown or uninteresting variable-length marker */ |
266 | { | 266 | { |
267 | unsigned int length; | 267 | unsigned int length; |
268 | 268 | ||
269 | /* Get the marker parameter length count */ | 269 | /* Get the marker parameter length count */ |
270 | length = read_2_bytes(); | 270 | length = read_2_bytes(); |
271 | /* Length includes itself, so must be at least 2 */ | 271 | /* Length includes itself, so must be at least 2 */ |
272 | if (length < 2) | 272 | if (length < 2) |
273 | ERREXIT("Erroneous JPEG marker length"); | 273 | ERREXIT("Erroneous JPEG marker length"); |
274 | length -= 2; | 274 | length -= 2; |
275 | /* Skip over the remaining bytes */ | 275 | /* Skip over the remaining bytes */ |
276 | while (length > 0) { | 276 | while (length > 0) { |
277 | (void) read_1_byte(); | 277 | (void) read_1_byte(); |
278 | length--; | 278 | length--; |
279 | } | 279 | } |
280 | } | 280 | } |
281 | 281 | ||
282 | 282 | ||
283 | /* | 283 | /* |
284 | * Parse the marker stream until SOFn or EOI is seen; | 284 | * Parse the marker stream until SOFn or EOI is seen; |
285 | * copy data to output, but discard COM markers unless keep_COM is true. | 285 | * copy data to output, but discard COM markers unless keep_COM is true. |
286 | */ | 286 | */ |
287 | 287 | ||
288 | static int | 288 | static int |
289 | scan_JPEG_header (int keep_COM) | 289 | scan_JPEG_header (int keep_COM) |
290 | { | 290 | { |
291 | int marker; | 291 | int marker; |
292 | 292 | ||
293 | /* Expect SOI at start of file */ | 293 | /* Expect SOI at start of file */ |
294 | if (first_marker() != M_SOI) | 294 | if (first_marker() != M_SOI) |
295 | ERREXIT("Expected SOI marker first"); | 295 | ERREXIT("Expected SOI marker first"); |
296 | write_marker(M_SOI); | 296 | write_marker(M_SOI); |
297 | 297 | ||
298 | /* Scan miscellaneous markers until we reach SOFn. */ | 298 | /* Scan miscellaneous markers until we reach SOFn. */ |
299 | for (;;) { | 299 | for (;;) { |
300 | marker = next_marker(); | 300 | marker = next_marker(); |
301 | switch (marker) { | 301 | switch (marker) { |
302 | /* Note that marker codes 0xC4, 0xC8, 0xCC are not, and must not be, | 302 | /* Note that marker codes 0xC4, 0xC8, 0xCC are not, and must not be, |
303 | * treated as SOFn. C4 in particular is actually DHT. | 303 | * treated as SOFn. C4 in particular is actually DHT. |
304 | */ | 304 | */ |
305 | case M_SOF0: /* Baseline */ | 305 | case M_SOF0: /* Baseline */ |
306 | case M_SOF1: /* Extended sequential, Huffman */ | 306 | case M_SOF1: /* Extended sequential, Huffman */ |
307 | case M_SOF2: /* Progressive, Huffman */ | 307 | case M_SOF2: /* Progressive, Huffman */ |
308 | case M_SOF3: /* Lossless, Huffman */ | 308 | case M_SOF3: /* Lossless, Huffman */ |
309 | case M_SOF5: /* Differential sequential, Huffman */ | 309 | case M_SOF5: /* Differential sequential, Huffman */ |
310 | case M_SOF6: /* Differential progressive, Huffman */ | 310 | case M_SOF6: /* Differential progressive, Huffman */ |
311 | case M_SOF7: /* Differential lossless, Huffman */ | 311 | case M_SOF7: /* Differential lossless, Huffman */ |
312 | case M_SOF9: /* Extended sequential, arithmetic */ | 312 | case M_SOF9: /* Extended sequential, arithmetic */ |
313 | case M_SOF10: /* Progressive, arithmetic */ | 313 | case M_SOF10: /* Progressive, arithmetic */ |
314 | case M_SOF11: /* Lossless, arithmetic */ | 314 | case M_SOF11: /* Lossless, arithmetic */ |
315 | case M_SOF13: /* Differential sequential, arithmetic */ | 315 | case M_SOF13: /* Differential sequential, arithmetic */ |
316 | case M_SOF14: /* Differential progressive, arithmetic */ | 316 | case M_SOF14: /* Differential progressive, arithmetic */ |
317 | case M_SOF15: /* Differential lossless, arithmetic */ | 317 | case M_SOF15: /* Differential lossless, arithmetic */ |
318 | return marker; | 318 | return marker; |
319 | 319 | ||
320 | case M_SOS: /* should not see compressed data before SOF */ | 320 | case M_SOS: /* should not see compressed data before SOF */ |
321 | ERREXIT("SOS without prior SOFn"); | 321 | ERREXIT("SOS without prior SOFn"); |
322 | break; | 322 | break; |
323 | 323 | ||
324 | case M_EOI: /* in case it's a tables-only JPEG stream */ | 324 | case M_EOI: /* in case it's a tables-only JPEG stream */ |
325 | return marker; | 325 | return marker; |
326 | 326 | ||
327 | case M_COM: /* Existing COM: conditionally discard */ | 327 | case M_COM: /* Existing COM: conditionally discard */ |
328 | if (keep_COM) { | 328 | if (keep_COM) { |
329 | write_marker(marker); | 329 | write_marker(marker); |
330 | copy_variable(); | 330 | copy_variable(); |
331 | } else { | 331 | } else { |
332 | skip_variable(); | 332 | skip_variable(); |
333 | } | 333 | } |
334 | break; | 334 | break; |
335 | 335 | ||
336 | default: /* Anything else just gets copied */ | 336 | default: /* Anything else just gets copied */ |
337 | write_marker(marker); | 337 | write_marker(marker); |
338 | copy_variable(); /* we assume it has a parameter count... */ | 338 | copy_variable(); /* we assume it has a parameter count... */ |
339 | break; | 339 | break; |
340 | } | 340 | } |
341 | } /* end loop */ | 341 | } /* end loop */ |
342 | } | 342 | } |
343 | 343 | ||
344 | 344 | ||
345 | /* Command line parsing code */ | 345 | /* Command line parsing code */ |
346 | 346 | ||
347 | static const char * progname; /* program name for error messages */ | 347 | static const char * progname; /* program name for error messages */ |
348 | 348 | ||
349 | 349 | ||
350 | static void | 350 | static void |
351 | usage (void) | 351 | usage (void) |
352 | /* complain about bad command line */ | 352 | /* complain about bad command line */ |
353 | { | 353 | { |
354 | fprintf(stderr, "wrjpgcom inserts a textual comment in a JPEG file.\n"); | 354 | fprintf(stderr, "wrjpgcom inserts a textual comment in a JPEG file.\n"); |
355 | fprintf(stderr, "You can add to or replace any existing comment(s).\n"); | 355 | fprintf(stderr, "You can add to or replace any existing comment(s).\n"); |
356 | 356 | ||
357 | fprintf(stderr, "Usage: %s [switches] ", progname); | 357 | fprintf(stderr, "Usage: %s [switches] ", progname); |
358 | #ifdef TWO_FILE_COMMANDLINE | 358 | #ifdef TWO_FILE_COMMANDLINE |
359 | fprintf(stderr, "inputfile outputfile\n"); | 359 | fprintf(stderr, "inputfile outputfile\n"); |
360 | #else | 360 | #else |
361 | fprintf(stderr, "[inputfile]\n"); | 361 | fprintf(stderr, "[inputfile]\n"); |
362 | #endif | 362 | #endif |
363 | 363 | ||
364 | fprintf(stderr, "Switches (names may be abbreviated):\n"); | 364 | fprintf(stderr, "Switches (names may be abbreviated):\n"); |
365 | fprintf(stderr, " -replace Delete any existing comments\n"); | 365 | fprintf(stderr, " -replace Delete any existing comments\n"); |
366 | fprintf(stderr, " -comment \"text\" Insert comment with given text\n"); | 366 | fprintf(stderr, " -comment \"text\" Insert comment with given text\n"); |
367 | fprintf(stderr, " -cfile name Read comment from named file\n"); | 367 | fprintf(stderr, " -cfile name Read comment from named file\n"); |
368 | fprintf(stderr, "Notice that you must put quotes around the comment text\n"); | 368 | fprintf(stderr, "Notice that you must put quotes around the comment text\n"); |
369 | fprintf(stderr, "when you use -comment.\n"); | 369 | fprintf(stderr, "when you use -comment.\n"); |
370 | fprintf(stderr, "If you do not give either -comment or -cfile on the command line,\n"); | 370 | fprintf(stderr, "If you do not give either -comment or -cfile on the command line,\n"); |
371 | fprintf(stderr, "then the comment text is read from standard input.\n"); | 371 | fprintf(stderr, "then the comment text is read from standard input.\n"); |
372 | fprintf(stderr, "It can be multiple lines, up to %u characters total.\n", | 372 | fprintf(stderr, "It can be multiple lines, up to %u characters total.\n", |
373 | (unsigned int) MAX_COM_LENGTH); | 373 | (unsigned int) MAX_COM_LENGTH); |
374 | #ifndef TWO_FILE_COMMANDLINE | 374 | #ifndef TWO_FILE_COMMANDLINE |
375 | fprintf(stderr, "You must specify an input JPEG file name when supplying\n"); | 375 | fprintf(stderr, "You must specify an input JPEG file name when supplying\n"); |
376 | fprintf(stderr, "comment text from standard input.\n"); | 376 | fprintf(stderr, "comment text from standard input.\n"); |
377 | #endif | 377 | #endif |
378 | 378 | ||
379 | exit(EXIT_FAILURE); | 379 | exit(EXIT_FAILURE); |
380 | } | 380 | } |
381 | 381 | ||
382 | 382 | ||
383 | static int | 383 | static int |
384 | keymatch (char * arg, const char * keyword, int minchars) | 384 | keymatch (char * arg, const char * keyword, int minchars) |
385 | /* Case-insensitive matching of (possibly abbreviated) keyword switches. */ | 385 | /* Case-insensitive matching of (possibly abbreviated) keyword switches. */ |
386 | /* keyword is the constant keyword (must be lower case already), */ | 386 | /* keyword is the constant keyword (must be lower case already), */ |
387 | /* minchars is length of minimum legal abbreviation. */ | 387 | /* minchars is length of minimum legal abbreviation. */ |
388 | { | 388 | { |
389 | register int ca, ck; | 389 | register int ca, ck; |
390 | register int nmatched = 0; | 390 | register int nmatched = 0; |
391 | 391 | ||
392 | while ((ca = *arg++) != '\0') { | 392 | while ((ca = *arg++) != '\0') { |
393 | if ((ck = *keyword++) == '\0') | 393 | if ((ck = *keyword++) == '\0') |
394 | return 0; /* arg longer than keyword, no good */ | 394 | return 0; /* arg longer than keyword, no good */ |
395 | if (isupper(ca)) /* force arg to lcase (assume ck is already) */ | 395 | if (isupper(ca)) /* force arg to lcase (assume ck is already) */ |
396 | ca = tolower(ca); | 396 | ca = tolower(ca); |
397 | if (ca != ck) | 397 | if (ca != ck) |
398 | return 0; /* no good */ | 398 | return 0; /* no good */ |
399 | nmatched++; /* count matched characters */ | 399 | nmatched++; /* count matched characters */ |
400 | } | 400 | } |
401 | /* reached end of argument; fail if it's too short for unique abbrev */ | 401 | /* reached end of argument; fail if it's too short for unique abbrev */ |
402 | if (nmatched < minchars) | 402 | if (nmatched < minchars) |
403 | return 0; | 403 | return 0; |
404 | return 1; /* A-OK */ | 404 | return 1; /* A-OK */ |
405 | } | 405 | } |
406 | 406 | ||
407 | 407 | ||
408 | /* | 408 | /* |
409 | * The main program. | 409 | * The main program. |
410 | */ | 410 | */ |
411 | 411 | ||
412 | int | 412 | int |
413 | main (int argc, char **argv) | 413 | main (int argc, char **argv) |
414 | { | 414 | { |
415 | int argn; | 415 | int argn; |
416 | char * arg; | 416 | char * arg; |
417 | int keep_COM = 1; | 417 | int keep_COM = 1; |
418 | char * comment_arg = NULL; | 418 | char * comment_arg = NULL; |
419 | FILE * comment_file = NULL; | 419 | FILE * comment_file = NULL; |
420 | unsigned int comment_length = 0; | 420 | unsigned int comment_length = 0; |
421 | int marker; | 421 | int marker; |
422 | 422 | ||
423 | /* On Mac, fetch a command line. */ | 423 | /* On Mac, fetch a command line. */ |
424 | #ifdef USE_CCOMMAND | 424 | #ifdef USE_CCOMMAND |
425 | argc = ccommand(&argv); | 425 | argc = ccommand(&argv); |
426 | #endif | 426 | #endif |
427 | 427 | ||
428 | progname = argv[0]; | 428 | progname = argv[0]; |
429 | if (progname == NULL || progname[0] == 0) | 429 | if (progname == NULL || progname[0] == 0) |
430 | progname = "wrjpgcom"; /* in case C library doesn't provide it */ | 430 | progname = "wrjpgcom"; /* in case C library doesn't provide it */ |
431 | 431 | ||
432 | /* Parse switches, if any */ | 432 | /* Parse switches, if any */ |
433 | for (argn = 1; argn < argc; argn++) { | 433 | for (argn = 1; argn < argc; argn++) { |
434 | arg = argv[argn]; | 434 | arg = argv[argn]; |
435 | if (arg[0] != '-') | 435 | if (arg[0] != '-') |
436 | break; /* not switch, must be file name */ | 436 | break; /* not switch, must be file name */ |
437 | arg++; /* advance over '-' */ | 437 | arg++; /* advance over '-' */ |
438 | if (keymatch(arg, "replace", 1)) { | 438 | if (keymatch(arg, "replace", 1)) { |
439 | keep_COM = 0; | 439 | keep_COM = 0; |
440 | } else if (keymatch(arg, "cfile", 2)) { | 440 | } else if (keymatch(arg, "cfile", 2)) { |
441 | if (++argn >= argc) usage(); | 441 | if (++argn >= argc) usage(); |
442 | if ((comment_file = fopen(argv[argn], "r")) == NULL) { | 442 | if ((comment_file = fopen(argv[argn], "r")) == NULL) { |
443 | fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]); | 443 | fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]); |
444 | exit(EXIT_FAILURE); | 444 | exit(EXIT_FAILURE); |
445 | } | 445 | } |
446 | } else if (keymatch(arg, "comment", 1)) { | 446 | } else if (keymatch(arg, "comment", 1)) { |
447 | if (++argn >= argc) usage(); | 447 | if (++argn >= argc) usage(); |
448 | comment_arg = argv[argn]; | 448 | comment_arg = argv[argn]; |
449 | /* If the comment text starts with '"', then we are probably running | 449 | /* If the comment text starts with '"', then we are probably running |
450 | * under MS-DOG and must parse out the quoted string ourselves. Sigh. | 450 | * under MS-DOG and must parse out the quoted string ourselves. Sigh. |
451 | */ | 451 | */ |
452 | if (comment_arg[0] == '"') { | 452 | if (comment_arg[0] == '"') { |
453 | comment_arg = (char *) malloc((size_t) MAX_COM_LENGTH); | 453 | comment_arg = (char *) malloc((size_t) MAX_COM_LENGTH); |
454 | if (comment_arg == NULL) | 454 | if (comment_arg == NULL) |
455 | ERREXIT("Insufficient memory"); | 455 | ERREXIT("Insufficient memory"); |
456 | strcpy(comment_arg, argv[argn]+1); | 456 | strcpy(comment_arg, argv[argn]+1); |
457 | for (;;) { | 457 | for (;;) { |
458 | comment_length = (unsigned int) strlen(comment_arg); | 458 | comment_length = (unsigned int) strlen(comment_arg); |
459 | if (comment_length > 0 && comment_arg[comment_length-1] == '"') { | 459 | if (comment_length > 0 && comment_arg[comment_length-1] == '"') { |
460 | comment_arg[comment_length-1] = '\0'; /* zap terminating quote */ | 460 | comment_arg[comment_length-1] = '\0'; /* zap terminating quote */ |
461 | break; | 461 | break; |
462 | } | 462 | } |
463 | if (++argn >= argc) | 463 | if (++argn >= argc) |
464 | ERREXIT("Missing ending quote mark"); | 464 | ERREXIT("Missing ending quote mark"); |
465 | strcat(comment_arg, " "); | 465 | strcat(comment_arg, " "); |
466 | strcat(comment_arg, argv[argn]); | 466 | strcat(comment_arg, argv[argn]); |
467 | } | 467 | } |
468 | } | 468 | } |
469 | comment_length = (unsigned int) strlen(comment_arg); | 469 | comment_length = (unsigned int) strlen(comment_arg); |
470 | } else | 470 | } else |
471 | usage(); | 471 | usage(); |
472 | } | 472 | } |
473 | 473 | ||
474 | /* Cannot use both -comment and -cfile. */ | 474 | /* Cannot use both -comment and -cfile. */ |
475 | if (comment_arg != NULL && comment_file != NULL) | 475 | if (comment_arg != NULL && comment_file != NULL) |
476 | usage(); | 476 | usage(); |
477 | /* If there is neither -comment nor -cfile, we will read the comment text | 477 | /* If there is neither -comment nor -cfile, we will read the comment text |
478 | * from stdin; in this case there MUST be an input JPEG file name. | 478 | * from stdin; in this case there MUST be an input JPEG file name. |
479 | */ | 479 | */ |
480 | if (comment_arg == NULL && comment_file == NULL && argn >= argc) | 480 | if (comment_arg == NULL && comment_file == NULL && argn >= argc) |
481 | usage(); | 481 | usage(); |
482 | 482 | ||
483 | /* Open the input file. */ | 483 | /* Open the input file. */ |
484 | if (argn < argc) { | 484 | if (argn < argc) { |
485 | if ((infile = fopen(argv[argn], READ_BINARY)) == NULL) { | 485 | if ((infile = fopen(argv[argn], READ_BINARY)) == NULL) { |
486 | fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]); | 486 | fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]); |
487 | exit(EXIT_FAILURE); | 487 | exit(EXIT_FAILURE); |
488 | } | 488 | } |
489 | } else { | 489 | } else { |
490 | /* default input file is stdin */ | 490 | /* default input file is stdin */ |
491 | #ifdef USE_SETMODE /* need to hack file mode? */ | 491 | #ifdef USE_SETMODE /* need to hack file mode? */ |
492 | setmode(fileno(stdin), O_BINARY); | 492 | setmode(fileno(stdin), O_BINARY); |
493 | #endif | 493 | #endif |
494 | #ifdef USE_FDOPEN /* need to re-open in binary mode? */ | 494 | #ifdef USE_FDOPEN /* need to re-open in binary mode? */ |
495 | if ((infile = fdopen(fileno(stdin), READ_BINARY)) == NULL) { | 495 | if ((infile = fdopen(fileno(stdin), READ_BINARY)) == NULL) { |
496 | fprintf(stderr, "%s: can't open stdin\n", progname); | 496 | fprintf(stderr, "%s: can't open stdin\n", progname); |
497 | exit(EXIT_FAILURE); | 497 | exit(EXIT_FAILURE); |
498 | } | 498 | } |
499 | #else | 499 | #else |
500 | infile = stdin; | 500 | infile = stdin; |
501 | #endif | 501 | #endif |
502 | } | 502 | } |
503 | 503 | ||
504 | /* Open the output file. */ | 504 | /* Open the output file. */ |
505 | #ifdef TWO_FILE_COMMANDLINE | 505 | #ifdef TWO_FILE_COMMANDLINE |
506 | /* Must have explicit output file name */ | 506 | /* Must have explicit output file name */ |
507 | if (argn != argc-2) { | 507 | if (argn != argc-2) { |
508 | fprintf(stderr, "%s: must name one input and one output file\n", | 508 | fprintf(stderr, "%s: must name one input and one output file\n", |
509 | progname); | 509 | progname); |
510 | usage(); | 510 | usage(); |
511 | } | 511 | } |
512 | if ((outfile = fopen(argv[argn+1], WRITE_BINARY)) == NULL) { | 512 | if ((outfile = fopen(argv[argn+1], WRITE_BINARY)) == NULL) { |
513 | fprintf(stderr, "%s: can't open %s\n", progname, argv[argn+1]); | 513 | fprintf(stderr, "%s: can't open %s\n", progname, argv[argn+1]); |
514 | exit(EXIT_FAILURE); | 514 | exit(EXIT_FAILURE); |
515 | } | 515 | } |
516 | #else | 516 | #else |
517 | /* Unix style: expect zero or one file name */ | 517 | /* Unix style: expect zero or one file name */ |
518 | if (argn < argc-1) { | 518 | if (argn < argc-1) { |
519 | fprintf(stderr, "%s: only one input file\n", progname); | 519 | fprintf(stderr, "%s: only one input file\n", progname); |
520 | usage(); | 520 | usage(); |
521 | } | 521 | } |
522 | /* default output file is stdout */ | 522 | /* default output file is stdout */ |
523 | #ifdef USE_SETMODE /* need to hack file mode? */ | 523 | #ifdef USE_SETMODE /* need to hack file mode? */ |
524 | setmode(fileno(stdout), O_BINARY); | 524 | setmode(fileno(stdout), O_BINARY); |
525 | #endif | 525 | #endif |
526 | #ifdef USE_FDOPEN /* need to re-open in binary mode? */ | 526 | #ifdef USE_FDOPEN /* need to re-open in binary mode? */ |
527 | if ((outfile = fdopen(fileno(stdout), WRITE_BINARY)) == NULL) { | 527 | if ((outfile = fdopen(fileno(stdout), WRITE_BINARY)) == NULL) { |
528 | fprintf(stderr, "%s: can't open stdout\n", progname); | 528 | fprintf(stderr, "%s: can't open stdout\n", progname); |
529 | exit(EXIT_FAILURE); | 529 | exit(EXIT_FAILURE); |
530 | } | 530 | } |
531 | #else | 531 | #else |
532 | outfile = stdout; | 532 | outfile = stdout; |
533 | #endif | 533 | #endif |
534 | #endif /* TWO_FILE_COMMANDLINE */ | 534 | #endif /* TWO_FILE_COMMANDLINE */ |
535 | 535 | ||
536 | /* Collect comment text from comment_file or stdin, if necessary */ | 536 | /* Collect comment text from comment_file or stdin, if necessary */ |
537 | if (comment_arg == NULL) { | 537 | if (comment_arg == NULL) { |
538 | FILE * src_file; | 538 | FILE * src_file; |
539 | int c; | 539 | int c; |
540 | 540 | ||
541 | comment_arg = (char *) malloc((size_t) MAX_COM_LENGTH); | 541 | comment_arg = (char *) malloc((size_t) MAX_COM_LENGTH); |
542 | if (comment_arg == NULL) | 542 | if (comment_arg == NULL) |
543 | ERREXIT("Insufficient memory"); | 543 | ERREXIT("Insufficient memory"); |
544 | comment_length = 0; | 544 | comment_length = 0; |
545 | src_file = (comment_file != NULL ? comment_file : stdin); | 545 | src_file = (comment_file != NULL ? comment_file : stdin); |
546 | while ((c = getc(src_file)) != EOF) { | 546 | while ((c = getc(src_file)) != EOF) { |
547 | if (comment_length >= (unsigned int) MAX_COM_LENGTH) { | 547 | if (comment_length >= (unsigned int) MAX_COM_LENGTH) { |
548 | fprintf(stderr, "Comment text may not exceed %u bytes\n", | 548 | fprintf(stderr, "Comment text may not exceed %u bytes\n", |
549 | (unsigned int) MAX_COM_LENGTH); | 549 | (unsigned int) MAX_COM_LENGTH); |
550 | exit(EXIT_FAILURE); | 550 | exit(EXIT_FAILURE); |
551 | } | 551 | } |
552 | comment_arg[comment_length++] = (char) c; | 552 | comment_arg[comment_length++] = (char) c; |
553 | } | 553 | } |
554 | if (comment_file != NULL) | 554 | if (comment_file != NULL) |
555 | fclose(comment_file); | 555 | fclose(comment_file); |
556 | } | 556 | } |
557 | 557 | ||
558 | /* Copy JPEG headers until SOFn marker; | 558 | /* Copy JPEG headers until SOFn marker; |
559 | * we will insert the new comment marker just before SOFn. | 559 | * we will insert the new comment marker just before SOFn. |
560 | * This (a) causes the new comment to appear after, rather than before, | 560 | * This (a) causes the new comment to appear after, rather than before, |
561 | * existing comments; and (b) ensures that comments come after any JFIF | 561 | * existing comments; and (b) ensures that comments come after any JFIF |
562 | * or JFXX markers, as required by the JFIF specification. | 562 | * or JFXX markers, as required by the JFIF specification. |
563 | */ | 563 | */ |
564 | marker = scan_JPEG_header(keep_COM); | 564 | marker = scan_JPEG_header(keep_COM); |
565 | /* Insert the new COM marker, but only if nonempty text has been supplied */ | 565 | /* Insert the new COM marker, but only if nonempty text has been supplied */ |
566 | if (comment_length > 0) { | 566 | if (comment_length > 0) { |
567 | write_marker(M_COM); | 567 | write_marker(M_COM); |
568 | write_2_bytes(comment_length + 2); | 568 | write_2_bytes(comment_length + 2); |
569 | while (comment_length > 0) { | 569 | while (comment_length > 0) { |
570 | write_1_byte(*comment_arg++); | 570 | write_1_byte(*comment_arg++); |
571 | comment_length--; | 571 | comment_length--; |
572 | } | 572 | } |
573 | } | 573 | } |
574 | /* Duplicate the remainder of the source file. | 574 | /* Duplicate the remainder of the source file. |
575 | * Note that any COM markers occuring after SOF will not be touched. | 575 | * Note that any COM markers occuring after SOF will not be touched. |
576 | */ | 576 | */ |
577 | write_marker(marker); | 577 | write_marker(marker); |
578 | copy_rest_of_file(); | 578 | copy_rest_of_file(); |
579 | 579 | ||
580 | /* All done. */ | 580 | /* All done. */ |
581 | exit(EXIT_SUCCESS); | 581 | exit(EXIT_SUCCESS); |
582 | return 0; /* suppress no-return-value warnings */ | 582 | return 0; /* suppress no-return-value warnings */ |
583 | } | 583 | } |