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: iptc.c,v 1.1.1.4 2014/06/15 20:03:57 misho Exp $ */
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: */
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: */
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: */
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: */
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: */
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. */
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 */
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: */
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