/src/php-src/ext/standard/iptc.c

Source
/*
   +----------------------------------------------------------------------+
   | Copyright © The PHP Group and Contributors.                          |
   +----------------------------------------------------------------------+
   | This source file is subject to the Modified BSD License that is      |
   | bundled with this package in the file LICENSE, and is available      |
   | through the World Wide Web at <https://www.php.net/license/>.        |
   |                                                                      |
   | SPDX-License-Identifier: BSD-3-Clause                                |
   +----------------------------------------------------------------------+
   | Author: Thies C. Arntzen <thies@thieso.net>                          |
   +----------------------------------------------------------------------+
 */

/*
 * Functions to parse & compse IPTC data.
 * PhotoShop >= 3.0 can read and write textual data to JPEG files.
 * ... more to come .....
 *
 * i know, parts of this is now duplicated in image.c
 * but in this case i think it's okay!
 */

/*
 * TODO:
 *  - add IPTC translation table
 */

#include "php.h"
#include "ext/standard/head.h"

#include <sys/stat.h>

#include <stdint.h>
#ifndef PHP_WIN32
# include <inttypes.h>
#endif

/* some defines for the different JPEG block types */
#define M_SOF0  0xC0            /* Start Of Frame N */
#define M_SOF1  0xC1            /* N indicates which compression process */
#define M_SOF2  0xC2            /* Only SOF0-SOF2 are now in common use */
#define M_SOF3  0xC3
#define M_SOF5  0xC5            /* NB: codes C4 and CC are NOT SOF markers */
#define M_SOF6  0xC6
#define M_SOF7  0xC7
#define M_SOF9  0xC9
#define M_SOF10 0xCA
#define M_SOF11 0xCB
#define M_SOF13 0xCD
#define M_SOF14 0xCE
#define M_SOF15 0xCF
#define M_SOI   0xD8
#define M_EOI   0xD9            /* End Of Image (end of datastream) */
#define M_SOS   0xDA            /* Start Of Scan (begins compressed data) */
#define M_APP0  0xe0
#define M_APP1  0xe1
#define M_APP2  0xe2
#define M_APP3  0xe3
#define M_APP4  0xe4
#define M_APP5  0xe5
#define M_APP6  0xe6
#define M_APP7  0xe7
#define M_APP8  0xe8
#define M_APP9  0xe9
#define M_APP10 0xea
#define M_APP11 0xeb
#define M_APP12 0xec
#define M_APP13 0xed
#define M_APP14 0xee
#define M_APP15 0xef

/* {{{ php_iptc_put1 */
static int php_iptc_put1(FILE *fp, int spool, unsigned char c, unsigned char **spoolbuf, const unsigned char *spoolbuf_end)
{
  if (spool > 0)
    PUTC(c);

  if (spoolbuf) {
    if (UNEXPECTED(*spoolbuf >= spoolbuf_end)) {
      return EOF;
    }
    *(*spoolbuf)++ = c;
  }

  return c;
}
/* }}} */

/* {{{ php_iptc_get1 */
static int php_iptc_get1(FILE *fp, int spool, unsigned char **spoolbuf, const unsigned char *spoolbuf_end)
{
  int c;
  char cc;

  c = getc(fp);

  if (c == EOF) return EOF;

  if (spool > 0) {
    cc = c;
    PUTC(cc);
  }

  if (spoolbuf) {
    if (UNEXPECTED(*spoolbuf >= spoolbuf_end)) {
      return EOF;
    }
    *(*spoolbuf)++ = c;
  }

  return c;
}
/* }}} */

/* {{{ php_iptc_read_remaining */
static int php_iptc_read_remaining(FILE *fp, int spool, unsigned char **spoolbuf, const unsigned char *spoolbuf_end)
{
  while (php_iptc_get1(fp, spool, spoolbuf, spoolbuf_end) != EOF) continue;

  return M_EOI;
}
/* }}} */

/* {{{ php_iptc_skip_variable */
static int php_iptc_skip_variable(FILE *fp, int spool, unsigned char **spoolbuf, const unsigned char *spoolbuf_end)
{
  unsigned int  length;
  int c1, c2;

  if ((c1 = php_iptc_get1(fp, spool, spoolbuf, spoolbuf_end)) == EOF) return M_EOI;

  if ((c2 = php_iptc_get1(fp, spool, spoolbuf, spoolbuf_end)) == EOF) return M_EOI;

  length = (((unsigned char) c1) << 8) + ((unsigned char) c2);

  length -= 2;

  while (length--)
    if (php_iptc_get1(fp, spool, spoolbuf, spoolbuf_end) == EOF) return M_EOI;

  return 0;
}
/* }}} */

/* {{{ php_iptc_next_marker */
static int php_iptc_next_marker(FILE *fp, int spool, unsigned char **spoolbuf, const unsigned char *spoolbuf_end)
{
  int c;

  /* skip unimportant stuff */

  c = php_iptc_get1(fp, spool, spoolbuf, spoolbuf_end);

  if (c == EOF) return M_EOI;

  while (c != 0xff) {
    if ((c = php_iptc_get1(fp, spool, spoolbuf, spoolbuf_end)) == EOF)
      return M_EOI; /* we hit EOF */
  }

  /* get marker byte, swallowing possible padding */
  do {
    c = php_iptc_get1(fp, 0, 0, NULL);
    if (c == EOF)
      return M_EOI;       /* we hit EOF */
    else
    if (c == 0xff)
      php_iptc_put1(fp, spool, (unsigned char)c, spoolbuf, spoolbuf_end);
  } while (c == 0xff);

  return (unsigned int) c;
}
/* }}} */

static char psheader[] = "\xFF\xED\0\0Photoshop 3.0\08BIM\x04\x04\0\0\0\0";

/* {{{ Embed binary IPTC data into a JPEG image. */
PHP_FUNCTION(iptcembed)
{
  char *iptcdata, *jpeg_file;
  size_t iptcdata_len, jpeg_file_len;
  zend_long spool = 0;
  FILE *fp;
  unsigned int marker, done = 0;
  size_t inx;
  zend_string *spoolbuf = NULL;
  unsigned char *poi = NULL;
  unsigned char *spoolbuf_end = NULL;
  zend_stat_t sb = {0};
  bool written = 0;

  ZEND_PARSE_PARAMETERS_START(2, 3)
    Z_PARAM_STRING(iptcdata, iptcdata_len)
    Z_PARAM_PATH(jpeg_file, jpeg_file_len)
    Z_PARAM_OPTIONAL
    Z_PARAM_LONG(spool)
  ZEND_PARSE_PARAMETERS_END();

  if (php_check_open_basedir(jpeg_file)) {
    RETURN_FALSE;
  }

  if (iptcdata_len >= SIZE_MAX - sizeof(psheader) - 1025) {
    zend_argument_value_error(1, "is too large");
    RETURN_THROWS();
  }

  if ((fp = VCWD_FOPEN(jpeg_file, "rb")) == 0) {
    php_error_docref(NULL, E_WARNING, "Unable to open %s", jpeg_file);
    RETURN_FALSE;
  }

  if (spool < 2) {
    if (zend_fstat(fileno(fp), &sb) != 0) {
      fclose(fp);
      RETURN_FALSE;
    }

    spoolbuf = zend_string_safe_alloc(1, iptcdata_len + sizeof(psheader) + 1024 + 1, sb.st_size, 0);
    poi = (unsigned char*)ZSTR_VAL(spoolbuf);
    spoolbuf_end = poi + ZSTR_LEN(spoolbuf);
    memset(poi, 0, iptcdata_len + sizeof(psheader) + sb.st_size + 1024 + 1);
  }

  if (php_iptc_get1(fp, spool, poi?&poi:0, spoolbuf_end) != 0xFF) {
    fclose(fp);
    if (spoolbuf) {
      zend_string_efree(spoolbuf);
    }
    RETURN_FALSE;
  }

  if (php_iptc_get1(fp, spool, poi?&poi:0, spoolbuf_end) != 0xD8) {
err:
    fclose(fp);
    if (spoolbuf) {
      zend_string_efree(spoolbuf);
    }
    RETURN_FALSE;
  }

  while (!done) {
    marker = php_iptc_next_marker(fp, spool, poi?&poi:0, spoolbuf_end);

    if (marker == M_EOI) { /* EOF */
      break;
    } else if (marker != M_APP13) {
      if (php_iptc_put1(fp, spool, (unsigned char)marker, poi?&poi:0, spoolbuf_end) < 0) {
        goto err;
      }
    }

    switch (marker) {
      case M_APP13:
        /* we are going to write a new APP13 marker, so don't output the old one */
        php_iptc_skip_variable(fp, 0, 0, spoolbuf_end);
        fgetc(fp); /* skip already copied 0xFF byte */
        php_iptc_read_remaining(fp, spool, poi?&poi:0, spoolbuf_end);
        done = 1;
        break;

      case M_APP0:
        /* APP0 is in each and every JPEG, so when we hit APP0 we insert our new APP13! */
      case M_APP1:
        if (written) {
          /* don't try to write the data twice */
          break;
        }
        written = 1;

        php_iptc_skip_variable(fp, spool, poi?&poi:0, spoolbuf_end);

        if (iptcdata_len & 1) {
          iptcdata_len++; /* make the length even */
        }

        psheader[ 2 ] = (char) ((iptcdata_len+28)>>8);
        psheader[ 3 ] = (iptcdata_len+28)&0xff;

        for (inx = 0; inx < 28; inx++) {
          if (php_iptc_put1(fp, spool, psheader[inx], poi?&poi:0, spoolbuf_end) < 0) {
            goto err;
          }
        }

        if (php_iptc_put1(fp, spool, (unsigned char)(iptcdata_len>>8), poi?&poi:0, spoolbuf_end) < 0) {
          goto err;
        }
        if (php_iptc_put1(fp, spool, (unsigned char)(iptcdata_len&0xff), poi?&poi:0, spoolbuf_end) < 0) {
          goto err;
        }

        for (inx = 0; inx < iptcdata_len; inx++) {
          if (php_iptc_put1(fp, spool, iptcdata[inx], poi?&poi:0, spoolbuf_end) < 0) {
            goto err;
          }
        }
        break;

      case M_SOS:
        /* we hit data, no more marker-inserting can be done! */
        php_iptc_read_remaining(fp, spool, poi?&poi:0, spoolbuf_end);
        done = 1;
        break;

      default:
        php_iptc_skip_variable(fp, spool, poi?&poi:0, spoolbuf_end);
        break;
    }
  }

  fclose(fp);

  if (spool < 2) {
    *poi = '\0';
    spoolbuf = zend_string_truncate(spoolbuf, poi - (unsigned char*)ZSTR_VAL(spoolbuf), 0);
    RETURN_NEW_STR(spoolbuf);
  } else {
    RETURN_TRUE;
  }
}
/* }}} */

/* {{{ Parse binary IPTC-data into associative array */
PHP_FUNCTION(iptcparse)
{
  size_t inx = 0, len;
  unsigned int tagsfound = 0;
  unsigned char *buffer, recnum, dataset;
  char *str, key[16];
  size_t str_len;

  ZEND_PARSE_PARAMETERS_START(1, 1)
    Z_PARAM_STRING(str, str_len)
  ZEND_PARSE_PARAMETERS_END();

  buffer = (unsigned char *)str;

  while (inx < str_len) { /* find 1st tag */
    if ((buffer[inx] == 0x1c) && ((buffer[inx+1] == 0x01) || (buffer[inx+1] == 0x02))){
      break;
    } else {
      inx++;
    }
  }

  while (inx < str_len) {
    if (buffer[ inx++ ] != 0x1c) {
      break;   /* we ran against some data which does not conform to IPTC - stop parsing! */
    }

    if ((inx + 4) >= str_len)
      break;

    dataset = buffer[ inx++ ];
    recnum = buffer[ inx++ ];

    if (buffer[ inx ] & (unsigned char) 0x80) { /* long tag */
      if((inx+6) >= str_len) {
        break;
      }
      len = (((zend_long) buffer[ inx + 2 ]) << 24) + (((zend_long) buffer[ inx + 3 ]) << 16) +
          (((zend_long) buffer[ inx + 4 ]) <<  8) + (((zend_long) buffer[ inx + 5 ]));
      inx += 6;
    } else { /* short tag */
      len = (((unsigned short) buffer[ inx ])<<8) | (unsigned short)buffer[ inx+1 ];
      inx += 2;
    }

    if ((len > str_len) || (inx + len) > str_len) {
      break;
    }

    snprintf(key, sizeof(key), "%d#%03d", (unsigned int) dataset, (unsigned int) recnum);

    if (tagsfound == 0) { /* found the 1st tag - initialize the return array */
      array_init(return_value);
    }

    zval *element = zend_hash_str_lookup(Z_ARRVAL_P(return_value), key, strlen(key));
    if (Z_ISNULL_P(element)) {
      array_init(element);
    }

    add_next_index_stringl(element, (char *) buffer+inx, len);
    inx += len;
    tagsfound++;
  }

  if (! tagsfound) {
    RETURN_FALSE;
  }
}
/* }}} */

Coverage Report

Created: 2026-06-02 06:36

Line	Count	Source
1		/*
2		+----------------------------------------------------------------------+
3		\| Copyright © The PHP Group and Contributors. \|
4		+----------------------------------------------------------------------+
5		\| This source file is subject to the Modified BSD License that is \|
6		\| bundled with this package in the file LICENSE, and is available \|
7		\| through the World Wide Web at <https://www.php.net/license/>. \|
8		\| \|
9		\| SPDX-License-Identifier: BSD-3-Clause \|
10		+----------------------------------------------------------------------+
11		\| Author: Thies C. Arntzen <thies@thieso.net> \|
12		+----------------------------------------------------------------------+
13		*/
14
15		/*
16		* Functions to parse & compse IPTC data.
17		* PhotoShop >= 3.0 can read and write textual data to JPEG files.
18		* ... more to come .....
19		*
20		* i know, parts of this is now duplicated in image.c
21		* but in this case i think it's okay!
22		*/
23
24		/*
25		* TODO:
26		* - add IPTC translation table
27		*/
28
29		#include "php.h"
30		#include "ext/standard/head.h"
31
32		#include <sys/stat.h>
33
34		#include <stdint.h>
35		#ifndef PHP_WIN32
36		# include <inttypes.h>
37		#endif
38
39		/* some defines for the different JPEG block types */
40		#define M_SOF0 0xC0 /* Start Of Frame N */
41		#define M_SOF1 0xC1 /* N indicates which compression process */
42		#define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */
43		#define M_SOF3 0xC3
44		#define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */
45		#define M_SOF6 0xC6
46		#define M_SOF7 0xC7
47		#define M_SOF9 0xC9
48		#define M_SOF10 0xCA
49		#define M_SOF11 0xCB
50		#define M_SOF13 0xCD
51		#define M_SOF14 0xCE
52		#define M_SOF15 0xCF
53		#define M_SOI 0xD8
54	0	#define M_EOI 0xD9 /* End Of Image (end of datastream) */
55	0	#define M_SOS 0xDA /* Start Of Scan (begins compressed data) */
56	0	#define M_APP0 0xe0
57	0	#define M_APP1 0xe1
58		#define M_APP2 0xe2
59		#define M_APP3 0xe3
60		#define M_APP4 0xe4
61		#define M_APP5 0xe5
62		#define M_APP6 0xe6
63		#define M_APP7 0xe7
64		#define M_APP8 0xe8
65		#define M_APP9 0xe9
66		#define M_APP10 0xea
67		#define M_APP11 0xeb
68		#define M_APP12 0xec
69	0	#define M_APP13 0xed
70		#define M_APP14 0xee
71		#define M_APP15 0xef
72
73		/* {{{ php_iptc_put1 */
74		static int php_iptc_put1(FILE fp, int spool, unsigned char c, unsigned char spoolbuf, const unsigned char spoolbuf_end)
75	0	{
76	0	if (spool > 0)
77	0	PUTC(c);
78
79	0	if (spoolbuf) {
80	0	if (UNEXPECTED(*spoolbuf >= spoolbuf_end)) {
81	0	return EOF;
82	0	}
83	0	(spoolbuf)++ = c;
84	0	}
85
86	0	return c;
87	0	}
88		/* }}} */
89
90		/* {{{ php_iptc_get1 */
91		static int php_iptc_get1(FILE fp, int spool, unsigned char spoolbuf, const unsigned char spoolbuf_end)
92	0	{
93	0	int c;
94	0	char cc;
95
96	0	c = getc(fp);
97
98	0	if (c == EOF) return EOF;
99
100	0	if (spool > 0) {
101	0	cc = c;
102	0	PUTC(cc);
103	0	}
104
105	0	if (spoolbuf) {
106	0	if (UNEXPECTED(*spoolbuf >= spoolbuf_end)) {
107	0	return EOF;
108	0	}
109	0	(spoolbuf)++ = c;
110	0	}
111
112	0	return c;
113	0	}
114		/* }}} */
115
116		/* {{{ php_iptc_read_remaining */
117		static int php_iptc_read_remaining(FILE fp, int spool, unsigned char spoolbuf, const unsigned char spoolbuf_end)
118	0	{
119	0	while (php_iptc_get1(fp, spool, spoolbuf, spoolbuf_end) != EOF) continue;
120
121	0	return M_EOI;
122	0	}
123		/* }}} */
124
125		/* {{{ php_iptc_skip_variable */
126		static int php_iptc_skip_variable(FILE fp, int spool, unsigned char spoolbuf, const unsigned char spoolbuf_end)
127	0	{
128	0	unsigned int length;
129	0	int c1, c2;
130
131	0	if ((c1 = php_iptc_get1(fp, spool, spoolbuf, spoolbuf_end)) == EOF) return M_EOI;
132
133	0	if ((c2 = php_iptc_get1(fp, spool, spoolbuf, spoolbuf_end)) == EOF) return M_EOI;
134
135	0	length = (((unsigned char) c1) << 8) + ((unsigned char) c2);
136
137	0	length -= 2;
138
139	0	while (length--)
140	0	if (php_iptc_get1(fp, spool, spoolbuf, spoolbuf_end) == EOF) return M_EOI;
141
142	0	return 0;
143	0	}
144		/* }}} */
145
146		/* {{{ php_iptc_next_marker */
147		static int php_iptc_next_marker(FILE fp, int spool, unsigned char spoolbuf, const unsigned char spoolbuf_end)
148	0	{
149	0	int c;
150
151		/* skip unimportant stuff */
152
153	0	c = php_iptc_get1(fp, spool, spoolbuf, spoolbuf_end);
154
155	0	if (c == EOF) return M_EOI;
156
157	0	while (c != 0xff) {
158	0	if ((c = php_iptc_get1(fp, spool, spoolbuf, spoolbuf_end)) == EOF)
159	0	return M_EOI; /* we hit EOF */
160	0	}
161
162		/* get marker byte, swallowing possible padding */
163	0	do {
164	0	c = php_iptc_get1(fp, 0, 0, NULL);
165	0	if (c == EOF)
166	0	return M_EOI; /* we hit EOF */
167	0	else
168	0	if (c == 0xff)
169	0	php_iptc_put1(fp, spool, (unsigned char)c, spoolbuf, spoolbuf_end);
170	0	} while (c == 0xff);
171
172	0	return (unsigned int) c;
173	0	}
174		/* }}} */
175
176		static char psheader[] = "\xFF\xED\0\0Photoshop 3.0\08BIM\x04\x04\0\0\0\0";
177
178		/* {{{ Embed binary IPTC data into a JPEG image. */
179		PHP_FUNCTION(iptcembed)
180	0	{
181	0	char iptcdata, jpeg_file;
182	0	size_t iptcdata_len, jpeg_file_len;
183	0	zend_long spool = 0;
184	0	FILE *fp;
185	0	unsigned int marker, done = 0;
186	0	size_t inx;
187	0	zend_string *spoolbuf = NULL;
188	0	unsigned char *poi = NULL;
189	0	unsigned char *spoolbuf_end = NULL;
190	0	zend_stat_t sb = {0};
191	0	bool written = 0;
192
193	0	ZEND_PARSE_PARAMETERS_START(2, 3)
194	0	Z_PARAM_STRING(iptcdata, iptcdata_len)
195	0	Z_PARAM_PATH(jpeg_file, jpeg_file_len)
196	0	Z_PARAM_OPTIONAL
197	0	Z_PARAM_LONG(spool)
198	0	ZEND_PARSE_PARAMETERS_END();
199
200	0	if (php_check_open_basedir(jpeg_file)) {
201	0	RETURN_FALSE;
202	0	}
203
204	0	if (iptcdata_len >= SIZE_MAX - sizeof(psheader) - 1025) {
205	0	zend_argument_value_error(1, "is too large");
206	0	RETURN_THROWS();
207	0	}
208
209	0	if ((fp = VCWD_FOPEN(jpeg_file, "rb")) == 0) {
210	0	php_error_docref(NULL, E_WARNING, "Unable to open %s", jpeg_file);
211	0	RETURN_FALSE;
212	0	}
213
214	0	if (spool < 2) {
215	0	if (zend_fstat(fileno(fp), &sb) != 0) {
216	0	fclose(fp);
217	0	RETURN_FALSE;
218	0	}
219
220	0	spoolbuf = zend_string_safe_alloc(1, iptcdata_len + sizeof(psheader) + 1024 + 1, sb.st_size, 0);
221	0	poi = (unsigned char*)ZSTR_VAL(spoolbuf);
222	0	spoolbuf_end = poi + ZSTR_LEN(spoolbuf);
223	0	memset(poi, 0, iptcdata_len + sizeof(psheader) + sb.st_size + 1024 + 1);
224	0	}
225
226	0	if (php_iptc_get1(fp, spool, poi?&poi:0, spoolbuf_end) != 0xFF) {
227	0	fclose(fp);
228	0	if (spoolbuf) {
229	0	zend_string_efree(spoolbuf);
230	0	}
231	0	RETURN_FALSE;
232	0	}
233
234	0	if (php_iptc_get1(fp, spool, poi?&poi:0, spoolbuf_end) != 0xD8) {
235	0	err:
236	0	fclose(fp);
237	0	if (spoolbuf) {
238	0	zend_string_efree(spoolbuf);
239	0	}
240	0	RETURN_FALSE;
241	0	}
242
243	0	while (!done) {
244	0	marker = php_iptc_next_marker(fp, spool, poi?&poi:0, spoolbuf_end);
245
246	0	if (marker == M_EOI) { /* EOF */
247	0	break;
248	0	} else if (marker != M_APP13) {
249	0	if (php_iptc_put1(fp, spool, (unsigned char)marker, poi?&poi:0, spoolbuf_end) < 0) {
250	0	goto err;
251	0	}
252	0	}
253
254	0	switch (marker) {
255	0	case M_APP13:
256		/* we are going to write a new APP13 marker, so don't output the old one */
257	0	php_iptc_skip_variable(fp, 0, 0, spoolbuf_end);
258	0	fgetc(fp); /* skip already copied 0xFF byte */
259	0	php_iptc_read_remaining(fp, spool, poi?&poi:0, spoolbuf_end);
260	0	done = 1;
261	0	break;
262
263	0	case M_APP0:
264		/* APP0 is in each and every JPEG, so when we hit APP0 we insert our new APP13! */
265	0	case M_APP1:
266	0	if (written) {
267		/* don't try to write the data twice */
268	0	break;
269	0	}
270	0	written = 1;
271
272	0	php_iptc_skip_variable(fp, spool, poi?&poi:0, spoolbuf_end);
273
274	0	if (iptcdata_len & 1) {
275	0	iptcdata_len++; /* make the length even */
276	0	}
277
278	0	psheader[ 2 ] = (char) ((iptcdata_len+28)>>8);
279	0	psheader[ 3 ] = (iptcdata_len+28)&0xff;
280
281	0	for (inx = 0; inx < 28; inx++) {
282	0	if (php_iptc_put1(fp, spool, psheader[inx], poi?&poi:0, spoolbuf_end) < 0) {
283	0	goto err;
284	0	}
285	0	}
286
287	0	if (php_iptc_put1(fp, spool, (unsigned char)(iptcdata_len>>8), poi?&poi:0, spoolbuf_end) < 0) {
288	0	goto err;
289	0	}
290	0	if (php_iptc_put1(fp, spool, (unsigned char)(iptcdata_len&0xff), poi?&poi:0, spoolbuf_end) < 0) {
291	0	goto err;
292	0	}
293
294	0	for (inx = 0; inx < iptcdata_len; inx++) {
295	0	if (php_iptc_put1(fp, spool, iptcdata[inx], poi?&poi:0, spoolbuf_end) < 0) {
296	0	goto err;
297	0	}
298	0	}
299	0	break;
300
301	0	case M_SOS:
302		/* we hit data, no more marker-inserting can be done! */
303	0	php_iptc_read_remaining(fp, spool, poi?&poi:0, spoolbuf_end);
304	0	done = 1;
305	0	break;
306
307	0	default:
308	0	php_iptc_skip_variable(fp, spool, poi?&poi:0, spoolbuf_end);
309	0	break;
310	0	}
311	0	}
312
313	0	fclose(fp);
314
315	0	if (spool < 2) {
316	0	*poi = '\0';
317	0	spoolbuf = zend_string_truncate(spoolbuf, poi - (unsigned char*)ZSTR_VAL(spoolbuf), 0);
318	0	RETURN_NEW_STR(spoolbuf);
319	0	} else {
320	0	RETURN_TRUE;
321	0	}
322	0	}
323		/* }}} */
324
325		/* {{{ Parse binary IPTC-data into associative array */
326		PHP_FUNCTION(iptcparse)
327	0	{
328	0	size_t inx = 0, len;
329	0	unsigned int tagsfound = 0;
330	0	unsigned char *buffer, recnum, dataset;
331	0	char *str, key[16];
332	0	size_t str_len;
333
334	0	ZEND_PARSE_PARAMETERS_START(1, 1)
335	0	Z_PARAM_STRING(str, str_len)
336	0	ZEND_PARSE_PARAMETERS_END();
337
338	0	buffer = (unsigned char *)str;
339
340	0	while (inx < str_len) { /* find 1st tag */
341	0	if ((buffer[inx] == 0x1c) && ((buffer[inx+1] == 0x01) \|\| (buffer[inx+1] == 0x02))){
342	0	break;
343	0	} else {
344	0	inx++;
345	0	}
346	0	}
347
348	0	while (inx < str_len) {
349	0	if (buffer[ inx++ ] != 0x1c) {
350	0	break; /* we ran against some data which does not conform to IPTC - stop parsing! */
351	0	}
352
353	0	if ((inx + 4) >= str_len)
354	0	break;
355
356	0	dataset = buffer[ inx++ ];
357	0	recnum = buffer[ inx++ ];
358
359	0	if (buffer[ inx ] & (unsigned char) 0x80) { /* long tag */
360	0	if((inx+6) >= str_len) {
361	0	break;
362	0	}
363	0	len = (((zend_long) buffer[ inx + 2 ]) << 24) + (((zend_long) buffer[ inx + 3 ]) << 16) +
364	0	(((zend_long) buffer[ inx + 4 ]) << 8) + (((zend_long) buffer[ inx + 5 ]));
365	0	inx += 6;
366	0	} else { /* short tag */
367	0	len = (((unsigned short) buffer[ inx ])<<8) \| (unsigned short)buffer[ inx+1 ];
368	0	inx += 2;
369	0	}
370
371	0	if ((len > str_len) \|\| (inx + len) > str_len) {
372	0	break;
373	0	}
374
375	0	snprintf(key, sizeof(key), "%d#%03d", (unsigned int) dataset, (unsigned int) recnum);
376
377	0	if (tagsfound == 0) { /* found the 1st tag - initialize the return array */
378	0	array_init(return_value);
379	0	}
380
381	0	zval *element = zend_hash_str_lookup(Z_ARRVAL_P(return_value), key, strlen(key));
382	0	if (Z_ISNULL_P(element)) {
383	0	array_init(element);
384	0	}
385
386	0	add_next_index_stringl(element, (char *) buffer+inx, len);
387	0	inx += len;
388	0	tagsfound++;
389	0	}
390
391	0	if (! tagsfound) {
392	0	RETURN_FALSE;
393	0	}
394	0	}
395		/* }}} */