1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 5 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2014 The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Author: Thies C. Arntzen <thies@thieso.net> |
16 +----------------------------------------------------------------------+
17 */
18
19 /* $Id$ */
20
21 /*
22 * Functions to parse & compse IPTC data.
23 * PhotoShop >= 3.0 can read and write textual data to JPEG files.
24 * ... more to come .....
25 *
26 * i know, parts of this is now duplicated in image.c
27 * but in this case i think it's okay!
28 */
29
30 /*
31 * TODO:
32 * - add IPTC translation table
33 */
34
35 #include "php.h"
36 #include "php_iptc.h"
37 #include "ext/standard/head.h"
38
39 #include <sys/stat.h>
40
41
42 /* some defines for the different JPEG block types */
43 #define M_SOF0 0xC0 /* Start Of Frame N */
44 #define M_SOF1 0xC1 /* N indicates which compression process */
45 #define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */
46 #define M_SOF3 0xC3
47 #define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */
48 #define M_SOF6 0xC6
49 #define M_SOF7 0xC7
50 #define M_SOF9 0xC9
51 #define M_SOF10 0xCA
52 #define M_SOF11 0xCB
53 #define M_SOF13 0xCD
54 #define M_SOF14 0xCE
55 #define M_SOF15 0xCF
56 #define M_SOI 0xD8
57 #define M_EOI 0xD9 /* End Of Image (end of datastream) */
58 #define M_SOS 0xDA /* Start Of Scan (begins compressed data) */
59 #define M_APP0 0xe0
60 #define M_APP1 0xe1
61 #define M_APP2 0xe2
62 #define M_APP3 0xe3
63 #define M_APP4 0xe4
64 #define M_APP5 0xe5
65 #define M_APP6 0xe6
66 #define M_APP7 0xe7
67 #define M_APP8 0xe8
68 #define M_APP9 0xe9
69 #define M_APP10 0xea
70 #define M_APP11 0xeb
71 #define M_APP12 0xec
72 #define M_APP13 0xed
73 #define M_APP14 0xee
74 #define M_APP15 0xef
75
76 /* {{{ php_iptc_put1
77 */
php_iptc_put1(FILE * fp,int spool,unsigned char c,unsigned char ** spoolbuf TSRMLS_DC)78 static int php_iptc_put1(FILE *fp, int spool, unsigned char c, unsigned char **spoolbuf TSRMLS_DC)
79 {
80 if (spool > 0)
81 PUTC(c);
82
83 if (spoolbuf) *(*spoolbuf)++ = c;
84
85 return c;
86 }
87 /* }}} */
88
89 /* {{{ php_iptc_get1
90 */
php_iptc_get1(FILE * fp,int spool,unsigned char ** spoolbuf TSRMLS_DC)91 static int php_iptc_get1(FILE *fp, int spool, unsigned char **spoolbuf TSRMLS_DC)
92 {
93 int c;
94 char cc;
95
96 c = getc(fp);
97
98 if (c == EOF) return EOF;
99
100 if (spool > 0) {
101 cc = c;
102 PUTC(cc);
103 }
104
105 if (spoolbuf) *(*spoolbuf)++ = c;
106
107 return c;
108 }
109 /* }}} */
110
111 /* {{{ php_iptc_read_remaining
112 */
php_iptc_read_remaining(FILE * fp,int spool,unsigned char ** spoolbuf TSRMLS_DC)113 static int php_iptc_read_remaining(FILE *fp, int spool, unsigned char **spoolbuf TSRMLS_DC)
114 {
115 while (php_iptc_get1(fp, spool, spoolbuf TSRMLS_CC) != EOF) continue;
116
117 return M_EOI;
118 }
119 /* }}} */
120
121 /* {{{ php_iptc_skip_variable
122 */
php_iptc_skip_variable(FILE * fp,int spool,unsigned char ** spoolbuf TSRMLS_DC)123 static int php_iptc_skip_variable(FILE *fp, int spool, unsigned char **spoolbuf TSRMLS_DC)
124 {
125 unsigned int length;
126 int c1, c2;
127
128 if ((c1 = php_iptc_get1(fp, spool, spoolbuf TSRMLS_CC)) == EOF) return M_EOI;
129
130 if ((c2 = php_iptc_get1(fp, spool, spoolbuf TSRMLS_CC)) == EOF) return M_EOI;
131
132 length = (((unsigned char) c1) << 8) + ((unsigned char) c2);
133
134 length -= 2;
135
136 while (length--)
137 if (php_iptc_get1(fp, spool, spoolbuf TSRMLS_CC) == EOF) return M_EOI;
138
139 return 0;
140 }
141 /* }}} */
142
143 /* {{{ php_iptc_next_marker
144 */
php_iptc_next_marker(FILE * fp,int spool,unsigned char ** spoolbuf TSRMLS_DC)145 static int php_iptc_next_marker(FILE *fp, int spool, unsigned char **spoolbuf TSRMLS_DC)
146 {
147 int c;
148
149 /* skip unimportant stuff */
150
151 c = php_iptc_get1(fp, spool, spoolbuf TSRMLS_CC);
152
153 if (c == EOF) return M_EOI;
154
155 while (c != 0xff) {
156 if ((c = php_iptc_get1(fp, spool, spoolbuf TSRMLS_CC)) == EOF)
157 return M_EOI; /* we hit EOF */
158 }
159
160 /* get marker byte, swallowing possible padding */
161 do {
162 c = php_iptc_get1(fp, 0, 0 TSRMLS_CC);
163 if (c == EOF)
164 return M_EOI; /* we hit EOF */
165 else
166 if (c == 0xff)
167 php_iptc_put1(fp, spool, (unsigned char)c, spoolbuf TSRMLS_CC);
168 } while (c == 0xff);
169
170 return (unsigned int) c;
171 }
172 /* }}} */
173
174 static char psheader[] = "\xFF\xED\0\0Photoshop 3.0\08BIM\x04\x04\0\0\0\0";
175
176 /* {{{ proto array iptcembed(string iptcdata, string jpeg_file_name [, int spool])
177 Embed binary IPTC data into a JPEG image. */
PHP_FUNCTION(iptcembed)178 PHP_FUNCTION(iptcembed)
179 {
180 char *iptcdata, *jpeg_file;
181 int iptcdata_len, jpeg_file_len;
182 long spool = 0;
183 FILE *fp;
184 unsigned int marker, done = 0;
185 int inx;
186 unsigned char *spoolbuf = NULL, *poi = NULL;
187 struct stat sb;
188 zend_bool written = 0;
189
190 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sp|l", &iptcdata, &iptcdata_len, &jpeg_file, &jpeg_file_len, &spool) != SUCCESS) {
191 return;
192 }
193
194 if (php_check_open_basedir(jpeg_file TSRMLS_CC)) {
195 RETURN_FALSE;
196 }
197
198 if ((fp = VCWD_FOPEN(jpeg_file, "rb")) == 0) {
199 php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to open %s", jpeg_file);
200 RETURN_FALSE;
201 }
202
203 if (spool < 2) {
204 fstat(fileno(fp), &sb);
205
206 poi = spoolbuf = safe_emalloc(1, iptcdata_len + sizeof(psheader) + sb.st_size + 1024, 1);
207 memset(poi, 0, iptcdata_len + sizeof(psheader) + sb.st_size + 1024 + 1);
208 }
209
210 if (php_iptc_get1(fp, spool, poi?&poi:0 TSRMLS_CC) != 0xFF) {
211 fclose(fp);
212 if (spoolbuf) {
213 efree(spoolbuf);
214 }
215 RETURN_FALSE;
216 }
217
218 if (php_iptc_get1(fp, spool, poi?&poi:0 TSRMLS_CC) != 0xD8) {
219 fclose(fp);
220 if (spoolbuf) {
221 efree(spoolbuf);
222 }
223 RETURN_FALSE;
224 }
225
226 while (!done) {
227 marker = php_iptc_next_marker(fp, spool, poi?&poi:0 TSRMLS_CC);
228
229 if (marker == M_EOI) { /* EOF */
230 break;
231 } else if (marker != M_APP13) {
232 php_iptc_put1(fp, spool, (unsigned char)marker, poi?&poi:0 TSRMLS_CC);
233 }
234
235 switch (marker) {
236 case M_APP13:
237 /* we are going to write a new APP13 marker, so don't output the old one */
238 php_iptc_skip_variable(fp, 0, 0 TSRMLS_CC);
239 php_iptc_read_remaining(fp, spool, poi?&poi:0 TSRMLS_CC);
240 done = 1;
241 break;
242
243 case M_APP0:
244 /* APP0 is in each and every JPEG, so when we hit APP0 we insert our new APP13! */
245 case M_APP1:
246 if (written) {
247 /* don't try to write the data twice */
248 break;
249 }
250 written = 1;
251
252 php_iptc_skip_variable(fp, spool, poi?&poi:0 TSRMLS_CC);
253
254 if (iptcdata_len & 1) {
255 iptcdata_len++; /* make the length even */
256 }
257
258 psheader[ 2 ] = (iptcdata_len+28)>>8;
259 psheader[ 3 ] = (iptcdata_len+28)&0xff;
260
261 for (inx = 0; inx < 28; inx++) {
262 php_iptc_put1(fp, spool, psheader[inx], poi?&poi:0 TSRMLS_CC);
263 }
264
265 php_iptc_put1(fp, spool, (unsigned char)(iptcdata_len>>8), poi?&poi:0 TSRMLS_CC);
266 php_iptc_put1(fp, spool, (unsigned char)(iptcdata_len&0xff), poi?&poi:0 TSRMLS_CC);
267
268 for (inx = 0; inx < iptcdata_len; inx++) {
269 php_iptc_put1(fp, spool, iptcdata[inx], poi?&poi:0 TSRMLS_CC);
270 }
271 break;
272
273 case M_SOS:
274 /* we hit data, no more marker-inserting can be done! */
275 php_iptc_read_remaining(fp, spool, poi?&poi:0 TSRMLS_CC);
276 done = 1;
277 break;
278
279 default:
280 php_iptc_skip_variable(fp, spool, poi?&poi:0 TSRMLS_CC);
281 break;
282 }
283 }
284
285 fclose(fp);
286
287 if (spool < 2) {
288 RETVAL_STRINGL(spoolbuf, poi - spoolbuf, 0);
289 } else {
290 RETURN_TRUE;
291 }
292 }
293 /* }}} */
294
295 /* {{{ proto array iptcparse(string iptcdata)
296 Parse binary IPTC-data into associative array */
PHP_FUNCTION(iptcparse)297 PHP_FUNCTION(iptcparse)
298 {
299 int inx = 0, len;
300 unsigned int tagsfound = 0;
301 unsigned char *buffer, recnum, dataset, key[ 16 ];
302 char *str;
303 int str_len;
304 zval *values, **element;
305
306 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &str, &str_len) != SUCCESS) {
307 return;
308 }
309
310 buffer = (unsigned char *)str;
311
312 while (inx < str_len) { /* find 1st tag */
313 if ((buffer[inx] == 0x1c) && ((buffer[inx+1] == 0x01) || (buffer[inx+1] == 0x02))){
314 break;
315 } else {
316 inx++;
317 }
318 }
319
320 while (inx < str_len) {
321 if (buffer[ inx++ ] != 0x1c) {
322 break; /* we ran against some data which does not conform to IPTC - stop parsing! */
323 }
324
325 if ((inx + 4) >= str_len)
326 break;
327
328 dataset = buffer[ inx++ ];
329 recnum = buffer[ inx++ ];
330
331 if (buffer[ inx ] & (unsigned char) 0x80) { /* long tag */
332 if((inx+6) >= str_len) {
333 break;
334 }
335 len = (((long) buffer[ inx + 2 ]) << 24) + (((long) buffer[ inx + 3 ]) << 16) +
336 (((long) buffer[ inx + 4 ]) << 8) + (((long) buffer[ inx + 5 ]));
337 inx += 6;
338 } else { /* short tag */
339 len = (((unsigned short) buffer[ inx ])<<8) | (unsigned short)buffer[ inx+1 ];
340 inx += 2;
341 }
342
343 if ((len < 0) || (len > str_len) || (inx + len) > str_len) {
344 break;
345 }
346
347 snprintf(key, sizeof(key), "%d#%03d", (unsigned int) dataset, (unsigned int) recnum);
348
349 if (tagsfound == 0) { /* found the 1st tag - initialize the return array */
350 array_init(return_value);
351 }
352
353 if (zend_hash_find(Z_ARRVAL_P(return_value), key, strlen(key) + 1, (void **) &element) == FAILURE) {
354 MAKE_STD_ZVAL(values);
355 array_init(values);
356
357 zend_hash_update(Z_ARRVAL_P(return_value), key, strlen(key) + 1, (void *) &values, sizeof(zval*), (void **) &element);
358 }
359
360 add_next_index_stringl(*element, buffer+inx, len, 1);
361 inx += len;
362 tagsfound++;
363 }
364
365 if (! tagsfound) {
366 RETURN_FALSE;
367 }
368 }
369 /* }}} */
370
371 /*
372 * Local variables:
373 * tab-width: 4
374 * c-basic-offset: 4
375 * End:
376 * vim600: sw=4 ts=4 fdm=marker
377 * vim<600: sw=4 ts=4
378 */
379
