ext/exif/exif.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
PHP_MINFO_FUNCTION
ZEND_TSRMLS_CACHE_DEFINE
ZEND_INI_MH
PHP_INI_BEGIN
PHP_MINIT_FUNCTION
PHP_MSHUTDOWN_FUNCTION
ZEND_GET_MODULE
exif_get_tagformat
exif_get_tagname
exif_char_dump
php_jpg_get16
php_ifd_get16u
php_ifd_get16s
php_ifd_get32s
php_ifd_get32u
php_ifd_set16u
php_ifd_set32u
exif_dump_data
exif_convert_any_format
exif_convert_any_to_int
exif_get_sectionname
exif_get_tag_table
exif_get_sectionlist
exif_error_docref
exif_file_sections_add
exif_file_sections_realloc
exif_file_sections_free
exif_iif_add_value
exif_iif_add_tag
exif_iif_add_int
exif_iif_add_str
exif_iif_add_fmt
exif_iif_add_buffer
exif_iif_free
add_assoc_image_info
exif_process_COM
exif_process_CME
exif_process_SOFn
exif_get_markername
PHP_FUNCTION
exif_ifd_make_value
exif_thumbnail_build
exif_thumbnail_extract
exif_process_undefined
exif_process_string_raw
exif_process_string
exif_process_user_comment
exif_process_unicode
exif_process_IFD_in_MAKERNOTE
exif_process_IFD_TAG
exif_process_IFD_in_JPEG
exif_process_TIFF_in_JPEG
exif_process_APP1
exif_process_APP12
exif_scan_JPEG_header
exif_scan_thumbnail
exif_process_IFD_in_TIFF
exif_scan_FILE_header
exif_discard_imageinfo
exif_read_file
PHP_FUNCTION
PHP_FUNCTION
PHP_FUNCTION
   1 /*
   2    +----------------------------------------------------------------------+
   3    | PHP Version 7                                                        |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 1997-2016 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    | Authors: Rasmus Lerdorf <rasmus@php.net>                             |
  16    |          Marcus Boerger <helly@php.net>                              |
  17    +----------------------------------------------------------------------+
  18  */
  19 
  20 /* $Id: 0f3c889b2162b3bab0b34dccaddc9f3011d7c161 $ */
  21 
  22 /*  ToDos
  23  *
  24  *      See if example images from http://www.exif.org have illegal
  25  *              thumbnail sizes or if code is corrupt.
  26  *      Create/Update exif headers.
  27  *      Create/Remove/Update image thumbnails.
  28  */
  29 
  30 /*  Security
  31  *
  32  *  At current time i do not see any security problems but a potential
  33  *  attacker could generate an image with recursive ifd pointers...(Marcus)
  34  */
  35 
  36 #ifdef HAVE_CONFIG_H
  37 #include "config.h"
  38 #endif
  39 
  40 #include "php.h"
  41 #include "ext/standard/file.h"
  42 
  43 #if HAVE_EXIF
  44 
  45 /* When EXIF_DEBUG is defined the module generates a lot of debug messages
  46  * that help understanding what is going on. This can and should be used
  47  * while extending the module as it shows if you are at the right position.
  48  * You are always considered to have a copy of TIFF6.0 and EXIF2.10 standard.
  49  */
  50 #undef EXIF_DEBUG
  51 
  52 #ifdef EXIF_DEBUG
  53 #define EXIFERR_DC , const char *_file, size_t _line
  54 #define EXIFERR_CC , __FILE__, __LINE__
  55 #else
  56 #define EXIFERR_DC
  57 #define EXIFERR_CC
  58 #endif
  59 
  60 #undef EXIF_JPEG2000
  61 
  62 #include "php_exif.h"
  63 #include <math.h>
  64 #include "php_ini.h"
  65 #include "ext/standard/php_string.h"
  66 #include "ext/standard/php_image.h"
  67 #include "ext/standard/info.h"
  68 
  69 /* needed for ssize_t definition */
  70 #include <sys/types.h>
  71 
  72 typedef unsigned char uchar;
  73 
  74 #ifndef safe_emalloc
  75 # define safe_emalloc(a,b,c) emalloc((a)*(b)+(c))
  76 #endif
  77 #ifndef safe_erealloc
  78 # define safe_erealloc(p,a,b,c) erealloc(p, (a)*(b)+(c))
  79 #endif
  80 
  81 #ifndef TRUE
  82 #       define TRUE 1
  83 #       define FALSE 0
  84 #endif
  85 
  86 #ifndef max
  87 #       define max(a,b) ((a)>(b) ? (a) : (b))
  88 #endif
  89 
  90 #define EFREE_IF(ptr)   if (ptr) efree(ptr)
  91 
  92 #define MAX_IFD_NESTING_LEVEL 100
  93 
  94 /* {{{ arginfo */
  95 ZEND_BEGIN_ARG_INFO(arginfo_exif_tagname, 0)
  96         ZEND_ARG_INFO(0, index)
  97 ZEND_END_ARG_INFO()
  98 
  99 ZEND_BEGIN_ARG_INFO_EX(arginfo_exif_read_data, 0, 0, 1)
 100         ZEND_ARG_INFO(0, filename)
 101         ZEND_ARG_INFO(0, sections_needed)
 102         ZEND_ARG_INFO(0, sub_arrays)
 103         ZEND_ARG_INFO(0, read_thumbnail)
 104 ZEND_END_ARG_INFO()
 105 
 106 ZEND_BEGIN_ARG_INFO_EX(arginfo_exif_thumbnail, 0, 0, 1)
 107         ZEND_ARG_INFO(0, filename)
 108         ZEND_ARG_INFO(1, width)
 109         ZEND_ARG_INFO(1, height)
 110         ZEND_ARG_INFO(1, imagetype)
 111 ZEND_END_ARG_INFO()
 112 
 113 ZEND_BEGIN_ARG_INFO(arginfo_exif_imagetype, 0)
 114         ZEND_ARG_INFO(0, imagefile)
 115 ZEND_END_ARG_INFO()
 116 
 117 /* }}} */
 118 
 119 /* {{{ exif_functions[]
 120  */
 121 const zend_function_entry exif_functions[] = {
 122         PHP_FE(exif_read_data, arginfo_exif_read_data)
 123         PHP_FALIAS(read_exif_data, exif_read_data, arginfo_exif_read_data)
 124         PHP_FE(exif_tagname, arginfo_exif_tagname)
 125         PHP_FE(exif_thumbnail, arginfo_exif_thumbnail)
 126         PHP_FE(exif_imagetype, arginfo_exif_imagetype)
 127         PHP_FE_END
 128 };
 129 /* }}} */
 130 
 131 /* {{{ PHP_MINFO_FUNCTION
 132  */
 133 PHP_MINFO_FUNCTION(exif)
 134 {
 135         php_info_print_table_start();
 136         php_info_print_table_row(2, "EXIF Support", "enabled");
 137         php_info_print_table_row(2, "EXIF Version", PHP_EXIF_VERSION);
 138         php_info_print_table_row(2, "Supported EXIF Version", "0220");
 139         php_info_print_table_row(2, "Supported filetypes", "JPEG,TIFF");
 140         php_info_print_table_end();
 141         DISPLAY_INI_ENTRIES();
 142 }
 143 /* }}} */
 144 
 145 ZEND_BEGIN_MODULE_GLOBALS(exif)
 146         char * encode_unicode;
 147         char * decode_unicode_be;
 148         char * decode_unicode_le;
 149         char * encode_jis;
 150         char * decode_jis_be;
 151         char * decode_jis_le;
 152 ZEND_END_MODULE_GLOBALS(exif)
 153 
 154 ZEND_DECLARE_MODULE_GLOBALS(exif)
 155 #define EXIF_G(v) ZEND_MODULE_GLOBALS_ACCESSOR(exif, v)
 156 
 157 #if defined(ZTS) && defined(COMPILE_DL_EXIF)
 158 ZEND_TSRMLS_CACHE_DEFINE()
 159 #endif
 160 
 161 /* {{{ PHP_INI
 162  */
 163 
 164 ZEND_INI_MH(OnUpdateEncode)
 165 {
 166         if (new_value && ZSTR_LEN(new_value)) {
 167                 const zend_encoding **return_list;
 168                 size_t return_size;
 169                 if (FAILURE == zend_multibyte_parse_encoding_list(ZSTR_VAL(new_value), ZSTR_LEN(new_value),
 170         &return_list, &return_size, 0)) {
 171                         php_error_docref(NULL, E_WARNING, "Illegal encoding ignored: '%s'", ZSTR_VAL(new_value));
 172                         return FAILURE;
 173                 }
 174                 efree(return_list);
 175         }
 176         return OnUpdateString(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage);
 177 }
 178 
 179 ZEND_INI_MH(OnUpdateDecode)
 180 {
 181         if (new_value) {
 182                 const zend_encoding **return_list;
 183                 size_t return_size;
 184                 if (FAILURE == zend_multibyte_parse_encoding_list(ZSTR_VAL(new_value), ZSTR_LEN(new_value),
 185         &return_list, &return_size, 0)) {
 186                         php_error_docref(NULL, E_WARNING, "Illegal encoding ignored: '%s'", ZSTR_VAL(new_value));
 187                         return FAILURE;
 188                 }
 189                 efree(return_list);
 190         }
 191         return OnUpdateString(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage);
 192 }
 193 
 194 PHP_INI_BEGIN()
 195     STD_PHP_INI_ENTRY("exif.encode_unicode",          "ISO-8859-15", PHP_INI_ALL, OnUpdateEncode, encode_unicode,    zend_exif_globals, exif_globals)
 196     STD_PHP_INI_ENTRY("exif.decode_unicode_motorola", "UCS-2BE",     PHP_INI_ALL, OnUpdateDecode, decode_unicode_be, zend_exif_globals, exif_globals)
 197     STD_PHP_INI_ENTRY("exif.decode_unicode_intel",    "UCS-2LE",     PHP_INI_ALL, OnUpdateDecode, decode_unicode_le, zend_exif_globals, exif_globals)
 198     STD_PHP_INI_ENTRY("exif.encode_jis",              "",            PHP_INI_ALL, OnUpdateEncode, encode_jis,        zend_exif_globals, exif_globals)
 199     STD_PHP_INI_ENTRY("exif.decode_jis_motorola",     "JIS",         PHP_INI_ALL, OnUpdateDecode, decode_jis_be,     zend_exif_globals, exif_globals)
 200     STD_PHP_INI_ENTRY("exif.decode_jis_intel",        "JIS",         PHP_INI_ALL, OnUpdateDecode, decode_jis_le,     zend_exif_globals, exif_globals)
 201 PHP_INI_END()
 202 /* }}} */
 203 
 204 /* {{{ PHP_GINIT_FUNCTION
 205  */
 206 static PHP_GINIT_FUNCTION(exif)
 207 {
 208 #if defined(COMPILE_DL_EXIF) && defined(ZTS)
 209         ZEND_TSRMLS_CACHE_UPDATE();
 210 #endif
 211         exif_globals->encode_unicode    = NULL;
 212         exif_globals->decode_unicode_be = NULL;
 213         exif_globals->decode_unicode_le = NULL;
 214         exif_globals->encode_jis        = NULL;
 215         exif_globals->decode_jis_be     = NULL;
 216         exif_globals->decode_jis_le     = NULL;
 217 }
 218 /* }}} */
 219 
 220 /* {{{ PHP_MINIT_FUNCTION(exif)
 221    Get the size of an image as 4-element array */
 222 PHP_MINIT_FUNCTION(exif)
 223 {
 224         REGISTER_INI_ENTRIES();
 225         if (zend_hash_str_exists(&module_registry, "mbstring", sizeof("mbstring")-1)) {
 226                 REGISTER_LONG_CONSTANT("EXIF_USE_MBSTRING", 1, CONST_CS | CONST_PERSISTENT);
 227         } else {
 228                 REGISTER_LONG_CONSTANT("EXIF_USE_MBSTRING", 0, CONST_CS | CONST_PERSISTENT);
 229         }
 230         return SUCCESS;
 231 }
 232 /* }}} */
 233 
 234 /* {{{ PHP_MSHUTDOWN_FUNCTION
 235  */
 236 PHP_MSHUTDOWN_FUNCTION(exif)
 237 {
 238         UNREGISTER_INI_ENTRIES();
 239         return SUCCESS;
 240 }
 241 /* }}} */
 242 
 243 /* {{{ exif dependencies */
 244 static const zend_module_dep exif_module_deps[] = {
 245         ZEND_MOD_REQUIRED("standard")
 246         ZEND_MOD_OPTIONAL("mbstring")
 247         ZEND_MOD_END
 248 };
 249 /* }}} */
 250 
 251 /* {{{ exif_module_entry
 252  */
 253 zend_module_entry exif_module_entry = {
 254         STANDARD_MODULE_HEADER_EX, NULL,
 255         exif_module_deps,
 256         "exif",
 257         exif_functions,
 258         PHP_MINIT(exif),
 259         PHP_MSHUTDOWN(exif),
 260         NULL, NULL,
 261         PHP_MINFO(exif),
 262         PHP_EXIF_VERSION,
 263         PHP_MODULE_GLOBALS(exif),
 264         PHP_GINIT(exif),
 265         NULL,
 266         NULL,
 267         STANDARD_MODULE_PROPERTIES_EX
 268 };
 269 /* }}} */
 270 
 271 #ifdef COMPILE_DL_EXIF
 272 ZEND_GET_MODULE(exif)
 273 #endif
 274 
 275 /* {{{ php_strnlen
 276  * get length of string if buffer if less than buffer size or buffer size */
 277 static size_t php_strnlen(char* str, size_t maxlen) {
 278         size_t len = 0;
 279 
 280         if (str && maxlen && *str) {
 281                 do {
 282                         len++;
 283                 } while (--maxlen && *(++str));
 284         }
 285         return len;
 286 }
 287 /* }}} */
 288 
 289 /* {{{ error messages
 290 */
 291 static const char * EXIF_ERROR_FILEEOF   = "Unexpected end of file reached";
 292 static const char * EXIF_ERROR_CORRUPT   = "File structure corrupted";
 293 static const char * EXIF_ERROR_THUMBEOF  = "Thumbnail goes IFD boundary or end of file reached";
 294 static const char * EXIF_ERROR_FSREALLOC = "Illegal reallocating of undefined file section";
 295 
 296 #define EXIF_ERRLOG_FILEEOF(ImageInfo)    exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "%s", EXIF_ERROR_FILEEOF);
 297 #define EXIF_ERRLOG_CORRUPT(ImageInfo)    exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "%s", EXIF_ERROR_CORRUPT);
 298 #define EXIF_ERRLOG_THUMBEOF(ImageInfo)   exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "%s", EXIF_ERROR_THUMBEOF);
 299 #define EXIF_ERRLOG_FSREALLOC(ImageInfo)  exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "%s", EXIF_ERROR_FSREALLOC);
 300 /* }}} */
 301 
 302 /* {{{ format description defines
 303    Describes format descriptor
 304 */
 305 static int php_tiff_bytes_per_format[] = {0, 1, 1, 2, 4, 8, 1, 1, 2, 4, 8, 4, 8, 1};
 306 #define NUM_FORMATS 13
 307 
 308 #define TAG_FMT_BYTE       1
 309 #define TAG_FMT_STRING     2
 310 #define TAG_FMT_USHORT     3
 311 #define TAG_FMT_ULONG      4
 312 #define TAG_FMT_URATIONAL  5
 313 #define TAG_FMT_SBYTE      6
 314 #define TAG_FMT_UNDEFINED  7
 315 #define TAG_FMT_SSHORT     8
 316 #define TAG_FMT_SLONG      9
 317 #define TAG_FMT_SRATIONAL 10
 318 #define TAG_FMT_SINGLE    11
 319 #define TAG_FMT_DOUBLE    12
 320 #define TAG_FMT_IFD       13
 321 
 322 #ifdef EXIF_DEBUG
 323 static char *exif_get_tagformat(int format)
 324 {
 325         switch(format) {
 326                 case TAG_FMT_BYTE:      return "BYTE";
 327                 case TAG_FMT_STRING:    return "STRING";
 328                 case TAG_FMT_USHORT:    return "USHORT";
 329                 case TAG_FMT_ULONG:     return "ULONG";
 330                 case TAG_FMT_URATIONAL: return "URATIONAL";
 331                 case TAG_FMT_SBYTE:     return "SBYTE";
 332                 case TAG_FMT_UNDEFINED: return "UNDEFINED";
 333                 case TAG_FMT_SSHORT:    return "SSHORT";
 334                 case TAG_FMT_SLONG:     return "SLONG";
 335                 case TAG_FMT_SRATIONAL: return "SRATIONAL";
 336                 case TAG_FMT_SINGLE:    return "SINGLE";
 337                 case TAG_FMT_DOUBLE:    return "DOUBLE";
 338                 case TAG_FMT_IFD:       return "IFD";
 339         }
 340         return "*Illegal";
 341 }
 342 #endif
 343 
 344 /* Describes tag values */
 345 #define TAG_GPS_VERSION_ID              0x0000
 346 #define TAG_GPS_LATITUDE_REF            0x0001
 347 #define TAG_GPS_LATITUDE                0x0002
 348 #define TAG_GPS_LONGITUDE_REF           0x0003
 349 #define TAG_GPS_LONGITUDE               0x0004
 350 #define TAG_GPS_ALTITUDE_REF            0x0005
 351 #define TAG_GPS_ALTITUDE                0x0006
 352 #define TAG_GPS_TIME_STAMP              0x0007
 353 #define TAG_GPS_SATELLITES              0x0008
 354 #define TAG_GPS_STATUS                  0x0009
 355 #define TAG_GPS_MEASURE_MODE            0x000A
 356 #define TAG_GPS_DOP                     0x000B
 357 #define TAG_GPS_SPEED_REF               0x000C
 358 #define TAG_GPS_SPEED                   0x000D
 359 #define TAG_GPS_TRACK_REF               0x000E
 360 #define TAG_GPS_TRACK                   0x000F
 361 #define TAG_GPS_IMG_DIRECTION_REF       0x0010
 362 #define TAG_GPS_IMG_DIRECTION           0x0011
 363 #define TAG_GPS_MAP_DATUM               0x0012
 364 #define TAG_GPS_DEST_LATITUDE_REF       0x0013
 365 #define TAG_GPS_DEST_LATITUDE           0x0014
 366 #define TAG_GPS_DEST_LONGITUDE_REF      0x0015
 367 #define TAG_GPS_DEST_LONGITUDE          0x0016
 368 #define TAG_GPS_DEST_BEARING_REF        0x0017
 369 #define TAG_GPS_DEST_BEARING            0x0018
 370 #define TAG_GPS_DEST_DISTANCE_REF       0x0019
 371 #define TAG_GPS_DEST_DISTANCE           0x001A
 372 #define TAG_GPS_PROCESSING_METHOD       0x001B
 373 #define TAG_GPS_AREA_INFORMATION        0x001C
 374 #define TAG_GPS_DATE_STAMP              0x001D
 375 #define TAG_GPS_DIFFERENTIAL            0x001E
 376 #define TAG_TIFF_COMMENT                0x00FE /* SHOUDLNT HAPPEN */
 377 #define TAG_NEW_SUBFILE                 0x00FE /* New version of subfile tag */
 378 #define TAG_SUBFILE_TYPE                0x00FF /* Old version of subfile tag */
 379 #define TAG_IMAGEWIDTH                  0x0100
 380 #define TAG_IMAGEHEIGHT                 0x0101
 381 #define TAG_BITS_PER_SAMPLE             0x0102
 382 #define TAG_COMPRESSION                 0x0103
 383 #define TAG_PHOTOMETRIC_INTERPRETATION  0x0106
 384 #define TAG_TRESHHOLDING                0x0107
 385 #define TAG_CELL_WIDTH                  0x0108
 386 #define TAG_CELL_HEIGHT                 0x0109
 387 #define TAG_FILL_ORDER                  0x010A
 388 #define TAG_DOCUMENT_NAME               0x010D
 389 #define TAG_IMAGE_DESCRIPTION           0x010E
 390 #define TAG_MAKE                        0x010F
 391 #define TAG_MODEL                       0x0110
 392 #define TAG_STRIP_OFFSETS               0x0111
 393 #define TAG_ORIENTATION                 0x0112
 394 #define TAG_SAMPLES_PER_PIXEL           0x0115
 395 #define TAG_ROWS_PER_STRIP              0x0116
 396 #define TAG_STRIP_BYTE_COUNTS           0x0117
 397 #define TAG_MIN_SAMPPLE_VALUE           0x0118
 398 #define TAG_MAX_SAMPLE_VALUE            0x0119
 399 #define TAG_X_RESOLUTION                0x011A
 400 #define TAG_Y_RESOLUTION                0x011B
 401 #define TAG_PLANAR_CONFIGURATION        0x011C
 402 #define TAG_PAGE_NAME                   0x011D
 403 #define TAG_X_POSITION                  0x011E
 404 #define TAG_Y_POSITION                  0x011F
 405 #define TAG_FREE_OFFSETS                0x0120
 406 #define TAG_FREE_BYTE_COUNTS            0x0121
 407 #define TAG_GRAY_RESPONSE_UNIT          0x0122
 408 #define TAG_GRAY_RESPONSE_CURVE         0x0123
 409 #define TAG_RESOLUTION_UNIT             0x0128
 410 #define TAG_PAGE_NUMBER                 0x0129
 411 #define TAG_TRANSFER_FUNCTION           0x012D
 412 #define TAG_SOFTWARE                    0x0131
 413 #define TAG_DATETIME                    0x0132
 414 #define TAG_ARTIST                      0x013B
 415 #define TAG_HOST_COMPUTER               0x013C
 416 #define TAG_PREDICTOR                   0x013D
 417 #define TAG_WHITE_POINT                 0x013E
 418 #define TAG_PRIMARY_CHROMATICITIES      0x013F
 419 #define TAG_COLOR_MAP                   0x0140
 420 #define TAG_HALFTONE_HINTS              0x0141
 421 #define TAG_TILE_WIDTH                  0x0142
 422 #define TAG_TILE_LENGTH                 0x0143
 423 #define TAG_TILE_OFFSETS                0x0144
 424 #define TAG_TILE_BYTE_COUNTS            0x0145
 425 #define TAG_SUB_IFD                     0x014A
 426 #define TAG_INK_SETMPUTER               0x014C
 427 #define TAG_INK_NAMES                   0x014D
 428 #define TAG_NUMBER_OF_INKS              0x014E
 429 #define TAG_DOT_RANGE                   0x0150
 430 #define TAG_TARGET_PRINTER              0x0151
 431 #define TAG_EXTRA_SAMPLE                0x0152
 432 #define TAG_SAMPLE_FORMAT               0x0153
 433 #define TAG_S_MIN_SAMPLE_VALUE          0x0154
 434 #define TAG_S_MAX_SAMPLE_VALUE          0x0155
 435 #define TAG_TRANSFER_RANGE              0x0156
 436 #define TAG_JPEG_TABLES                 0x015B
 437 #define TAG_JPEG_PROC                   0x0200
 438 #define TAG_JPEG_INTERCHANGE_FORMAT     0x0201
 439 #define TAG_JPEG_INTERCHANGE_FORMAT_LEN 0x0202
 440 #define TAG_JPEG_RESTART_INTERVAL       0x0203
 441 #define TAG_JPEG_LOSSLESS_PREDICTOR     0x0205
 442 #define TAG_JPEG_POINT_TRANSFORMS       0x0206
 443 #define TAG_JPEG_Q_TABLES               0x0207
 444 #define TAG_JPEG_DC_TABLES              0x0208
 445 #define TAG_JPEG_AC_TABLES              0x0209
 446 #define TAG_YCC_COEFFICIENTS            0x0211
 447 #define TAG_YCC_SUB_SAMPLING            0x0212
 448 #define TAG_YCC_POSITIONING             0x0213
 449 #define TAG_REFERENCE_BLACK_WHITE       0x0214
 450 /* 0x0301 - 0x0302 */
 451 /* 0x0320 */
 452 /* 0x0343 */
 453 /* 0x5001 - 0x501B */
 454 /* 0x5021 - 0x503B */
 455 /* 0x5090 - 0x5091 */
 456 /* 0x5100 - 0x5101 */
 457 /* 0x5110 - 0x5113 */
 458 /* 0x80E3 - 0x80E6 */
 459 /* 0x828d - 0x828F */
 460 #define TAG_COPYRIGHT                   0x8298
 461 #define TAG_EXPOSURETIME                0x829A
 462 #define TAG_FNUMBER                     0x829D
 463 #define TAG_EXIF_IFD_POINTER            0x8769
 464 #define TAG_ICC_PROFILE                 0x8773
 465 #define TAG_EXPOSURE_PROGRAM            0x8822
 466 #define TAG_SPECTRAL_SENSITY            0x8824
 467 #define TAG_GPS_IFD_POINTER             0x8825
 468 #define TAG_ISOSPEED                    0x8827
 469 #define TAG_OPTOELECTRIC_CONVERSION_F   0x8828
 470 /* 0x8829 - 0x882b */
 471 #define TAG_EXIFVERSION                 0x9000
 472 #define TAG_DATE_TIME_ORIGINAL          0x9003
 473 #define TAG_DATE_TIME_DIGITIZED         0x9004
 474 #define TAG_COMPONENT_CONFIG            0x9101
 475 #define TAG_COMPRESSED_BITS_PER_PIXEL   0x9102
 476 #define TAG_SHUTTERSPEED                0x9201
 477 #define TAG_APERTURE                    0x9202
 478 #define TAG_BRIGHTNESS_VALUE            0x9203
 479 #define TAG_EXPOSURE_BIAS_VALUE         0x9204
 480 #define TAG_MAX_APERTURE                0x9205
 481 #define TAG_SUBJECT_DISTANCE            0x9206
 482 #define TAG_METRIC_MODULE               0x9207
 483 #define TAG_LIGHT_SOURCE                0x9208
 484 #define TAG_FLASH                       0x9209
 485 #define TAG_FOCAL_LENGTH                0x920A
 486 /* 0x920B - 0x920D */
 487 /* 0x9211 - 0x9216 */
 488 #define TAG_SUBJECT_AREA                0x9214
 489 #define TAG_MAKER_NOTE                  0x927C
 490 #define TAG_USERCOMMENT                 0x9286
 491 #define TAG_SUB_SEC_TIME                0x9290
 492 #define TAG_SUB_SEC_TIME_ORIGINAL       0x9291
 493 #define TAG_SUB_SEC_TIME_DIGITIZED      0x9292
 494 /* 0x923F */
 495 /* 0x935C */
 496 #define TAG_XP_TITLE                    0x9C9B
 497 #define TAG_XP_COMMENTS                 0x9C9C
 498 #define TAG_XP_AUTHOR                   0x9C9D
 499 #define TAG_XP_KEYWORDS                 0x9C9E
 500 #define TAG_XP_SUBJECT                  0x9C9F
 501 #define TAG_FLASH_PIX_VERSION           0xA000
 502 #define TAG_COLOR_SPACE                 0xA001
 503 #define TAG_COMP_IMAGE_WIDTH            0xA002 /* compressed images only */
 504 #define TAG_COMP_IMAGE_HEIGHT           0xA003
 505 #define TAG_RELATED_SOUND_FILE          0xA004
 506 #define TAG_INTEROP_IFD_POINTER         0xA005 /* IFD pointer */
 507 #define TAG_FLASH_ENERGY                0xA20B
 508 #define TAG_SPATIAL_FREQUENCY_RESPONSE  0xA20C
 509 #define TAG_FOCALPLANE_X_RES            0xA20E
 510 #define TAG_FOCALPLANE_Y_RES            0xA20F
 511 #define TAG_FOCALPLANE_RESOLUTION_UNIT  0xA210
 512 #define TAG_SUBJECT_LOCATION            0xA214
 513 #define TAG_EXPOSURE_INDEX              0xA215
 514 #define TAG_SENSING_METHOD              0xA217
 515 #define TAG_FILE_SOURCE                 0xA300
 516 #define TAG_SCENE_TYPE                  0xA301
 517 #define TAG_CFA_PATTERN                 0xA302
 518 #define TAG_CUSTOM_RENDERED             0xA401
 519 #define TAG_EXPOSURE_MODE               0xA402
 520 #define TAG_WHITE_BALANCE               0xA403
 521 #define TAG_DIGITAL_ZOOM_RATIO          0xA404
 522 #define TAG_FOCAL_LENGTH_IN_35_MM_FILM  0xA405
 523 #define TAG_SCENE_CAPTURE_TYPE          0xA406
 524 #define TAG_GAIN_CONTROL                0xA407
 525 #define TAG_CONTRAST                    0xA408
 526 #define TAG_SATURATION                  0xA409
 527 #define TAG_SHARPNESS                   0xA40A
 528 #define TAG_DEVICE_SETTING_DESCRIPTION  0xA40B
 529 #define TAG_SUBJECT_DISTANCE_RANGE      0xA40C
 530 #define TAG_IMAGE_UNIQUE_ID             0xA420
 531 
 532 /* Olympus specific tags */
 533 #define TAG_OLYMPUS_SPECIALMODE         0x0200
 534 #define TAG_OLYMPUS_JPEGQUAL            0x0201
 535 #define TAG_OLYMPUS_MACRO               0x0202
 536 #define TAG_OLYMPUS_DIGIZOOM            0x0204
 537 #define TAG_OLYMPUS_SOFTWARERELEASE     0x0207
 538 #define TAG_OLYMPUS_PICTINFO            0x0208
 539 #define TAG_OLYMPUS_CAMERAID            0x0209
 540 /* end Olympus specific tags */
 541 
 542 /* Internal */
 543 #define TAG_NONE                                -1 /* note that -1 <> 0xFFFF */
 544 #define TAG_COMPUTED_VALUE                      -2
 545 #define TAG_END_OF_LIST                 0xFFFD
 546 
 547 /* Values for TAG_PHOTOMETRIC_INTERPRETATION */
 548 #define PMI_BLACK_IS_ZERO       0
 549 #define PMI_WHITE_IS_ZERO       1
 550 #define PMI_RGB                     2
 551 #define PMI_PALETTE_COLOR       3
 552 #define PMI_TRANSPARENCY_MASK   4
 553 #define PMI_SEPARATED           5
 554 #define PMI_YCBCR               6
 555 #define PMI_CIELAB              8
 556 
 557 /* }}} */
 558 
 559 /* {{{ TabTable[]
 560  */
 561 typedef const struct {
 562         unsigned short Tag;
 563         char *Desc;
 564 } tag_info_type;
 565 
 566 typedef tag_info_type  tag_info_array[];
 567 typedef tag_info_type  *tag_table_type;
 568 
 569 #define TAG_TABLE_END \
 570   {TAG_NONE,           "No tag value"},\
 571   {TAG_COMPUTED_VALUE, "Computed value"},\
 572   {TAG_END_OF_LIST,    ""}  /* Important for exif_get_tagname() IF value != "" function result is != false */
 573 
 574 static tag_info_array tag_table_IFD = {
 575   { 0x000B, "ACDComment"},
 576   { 0x00FE, "NewSubFile"}, /* better name it 'ImageType' ? */
 577   { 0x00FF, "SubFile"},
 578   { 0x0100, "ImageWidth"},
 579   { 0x0101, "ImageLength"},
 580   { 0x0102, "BitsPerSample"},
 581   { 0x0103, "Compression"},
 582   { 0x0106, "PhotometricInterpretation"},
 583   { 0x010A, "FillOrder"},
 584   { 0x010D, "DocumentName"},
 585   { 0x010E, "ImageDescription"},
 586   { 0x010F, "Make"},
 587   { 0x0110, "Model"},
 588   { 0x0111, "StripOffsets"},
 589   { 0x0112, "Orientation"},
 590   { 0x0115, "SamplesPerPixel"},
 591   { 0x0116, "RowsPerStrip"},
 592   { 0x0117, "StripByteCounts"},
 593   { 0x0118, "MinSampleValue"},
 594   { 0x0119, "MaxSampleValue"},
 595   { 0x011A, "XResolution"},
 596   { 0x011B, "YResolution"},
 597   { 0x011C, "PlanarConfiguration"},
 598   { 0x011D, "PageName"},
 599   { 0x011E, "XPosition"},
 600   { 0x011F, "YPosition"},
 601   { 0x0120, "FreeOffsets"},
 602   { 0x0121, "FreeByteCounts"},
 603   { 0x0122, "GrayResponseUnit"},
 604   { 0x0123, "GrayResponseCurve"},
 605   { 0x0124, "T4Options"},
 606   { 0x0125, "T6Options"},
 607   { 0x0128, "ResolutionUnit"},
 608   { 0x0129, "PageNumber"},
 609   { 0x012D, "TransferFunction"},
 610   { 0x0131, "Software"},
 611   { 0x0132, "DateTime"},
 612   { 0x013B, "Artist"},
 613   { 0x013C, "HostComputer"},
 614   { 0x013D, "Predictor"},
 615   { 0x013E, "WhitePoint"},
 616   { 0x013F, "PrimaryChromaticities"},
 617   { 0x0140, "ColorMap"},
 618   { 0x0141, "HalfToneHints"},
 619   { 0x0142, "TileWidth"},
 620   { 0x0143, "TileLength"},
 621   { 0x0144, "TileOffsets"},
 622   { 0x0145, "TileByteCounts"},
 623   { 0x014A, "SubIFD"},
 624   { 0x014C, "InkSet"},
 625   { 0x014D, "InkNames"},
 626   { 0x014E, "NumberOfInks"},
 627   { 0x0150, "DotRange"},
 628   { 0x0151, "TargetPrinter"},
 629   { 0x0152, "ExtraSample"},
 630   { 0x0153, "SampleFormat"},
 631   { 0x0154, "SMinSampleValue"},
 632   { 0x0155, "SMaxSampleValue"},
 633   { 0x0156, "TransferRange"},
 634   { 0x0157, "ClipPath"},
 635   { 0x0158, "XClipPathUnits"},
 636   { 0x0159, "YClipPathUnits"},
 637   { 0x015A, "Indexed"},
 638   { 0x015B, "JPEGTables"},
 639   { 0x015F, "OPIProxy"},
 640   { 0x0200, "JPEGProc"},
 641   { 0x0201, "JPEGInterchangeFormat"},
 642   { 0x0202, "JPEGInterchangeFormatLength"},
 643   { 0x0203, "JPEGRestartInterval"},
 644   { 0x0205, "JPEGLosslessPredictors"},
 645   { 0x0206, "JPEGPointTransforms"},
 646   { 0x0207, "JPEGQTables"},
 647   { 0x0208, "JPEGDCTables"},
 648   { 0x0209, "JPEGACTables"},
 649   { 0x0211, "YCbCrCoefficients"},
 650   { 0x0212, "YCbCrSubSampling"},
 651   { 0x0213, "YCbCrPositioning"},
 652   { 0x0214, "ReferenceBlackWhite"},
 653   { 0x02BC, "ExtensibleMetadataPlatform"}, /* XAP: Extensible Authoring Publishing, obsoleted by XMP: Extensible Metadata Platform */
 654   { 0x0301, "Gamma"},
 655   { 0x0302, "ICCProfileDescriptor"},
 656   { 0x0303, "SRGBRenderingIntent"},
 657   { 0x0320, "ImageTitle"},
 658   { 0x5001, "ResolutionXUnit"},
 659   { 0x5002, "ResolutionYUnit"},
 660   { 0x5003, "ResolutionXLengthUnit"},
 661   { 0x5004, "ResolutionYLengthUnit"},
 662   { 0x5005, "PrintFlags"},
 663   { 0x5006, "PrintFlagsVersion"},
 664   { 0x5007, "PrintFlagsCrop"},
 665   { 0x5008, "PrintFlagsBleedWidth"},
 666   { 0x5009, "PrintFlagsBleedWidthScale"},
 667   { 0x500A, "HalftoneLPI"},
 668   { 0x500B, "HalftoneLPIUnit"},
 669   { 0x500C, "HalftoneDegree"},
 670   { 0x500D, "HalftoneShape"},
 671   { 0x500E, "HalftoneMisc"},
 672   { 0x500F, "HalftoneScreen"},
 673   { 0x5010, "JPEGQuality"},
 674   { 0x5011, "GridSize"},
 675   { 0x5012, "ThumbnailFormat"},
 676   { 0x5013, "ThumbnailWidth"},
 677   { 0x5014, "ThumbnailHeight"},
 678   { 0x5015, "ThumbnailColorDepth"},
 679   { 0x5016, "ThumbnailPlanes"},
 680   { 0x5017, "ThumbnailRawBytes"},
 681   { 0x5018, "ThumbnailSize"},
 682   { 0x5019, "ThumbnailCompressedSize"},
 683   { 0x501A, "ColorTransferFunction"},
 684   { 0x501B, "ThumbnailData"},
 685   { 0x5020, "ThumbnailImageWidth"},
 686   { 0x5021, "ThumbnailImageHeight"},
 687   { 0x5022, "ThumbnailBitsPerSample"},
 688   { 0x5023, "ThumbnailCompression"},
 689   { 0x5024, "ThumbnailPhotometricInterp"},
 690   { 0x5025, "ThumbnailImageDescription"},
 691   { 0x5026, "ThumbnailEquipMake"},
 692   { 0x5027, "ThumbnailEquipModel"},
 693   { 0x5028, "ThumbnailStripOffsets"},
 694   { 0x5029, "ThumbnailOrientation"},
 695   { 0x502A, "ThumbnailSamplesPerPixel"},
 696   { 0x502B, "ThumbnailRowsPerStrip"},
 697   { 0x502C, "ThumbnailStripBytesCount"},
 698   { 0x502D, "ThumbnailResolutionX"},
 699   { 0x502E, "ThumbnailResolutionY"},
 700   { 0x502F, "ThumbnailPlanarConfig"},
 701   { 0x5030, "ThumbnailResolutionUnit"},
 702   { 0x5031, "ThumbnailTransferFunction"},
 703   { 0x5032, "ThumbnailSoftwareUsed"},
 704   { 0x5033, "ThumbnailDateTime"},
 705   { 0x5034, "ThumbnailArtist"},
 706   { 0x5035, "ThumbnailWhitePoint"},
 707   { 0x5036, "ThumbnailPrimaryChromaticities"},
 708   { 0x5037, "ThumbnailYCbCrCoefficients"},
 709   { 0x5038, "ThumbnailYCbCrSubsampling"},
 710   { 0x5039, "ThumbnailYCbCrPositioning"},
 711   { 0x503A, "ThumbnailRefBlackWhite"},
 712   { 0x503B, "ThumbnailCopyRight"},
 713   { 0x5090, "LuminanceTable"},
 714   { 0x5091, "ChrominanceTable"},
 715   { 0x5100, "FrameDelay"},
 716   { 0x5101, "LoopCount"},
 717   { 0x5110, "PixelUnit"},
 718   { 0x5111, "PixelPerUnitX"},
 719   { 0x5112, "PixelPerUnitY"},
 720   { 0x5113, "PaletteHistogram"},
 721   { 0x1000, "RelatedImageFileFormat"},
 722   { 0x800D, "ImageID"},
 723   { 0x80E3, "Matteing"},   /* obsoleted by ExtraSamples */
 724   { 0x80E4, "DataType"},   /* obsoleted by SampleFormat */
 725   { 0x80E5, "ImageDepth"},
 726   { 0x80E6, "TileDepth"},
 727   { 0x828D, "CFARepeatPatternDim"},
 728   { 0x828E, "CFAPattern"},
 729   { 0x828F, "BatteryLevel"},
 730   { 0x8298, "Copyright"},
 731   { 0x829A, "ExposureTime"},
 732   { 0x829D, "FNumber"},
 733   { 0x83BB, "IPTC/NAA"},
 734   { 0x84E3, "IT8RasterPadding"},
 735   { 0x84E5, "IT8ColorTable"},
 736   { 0x8649, "ImageResourceInformation"}, /* PhotoShop */
 737   { 0x8769, "Exif_IFD_Pointer"},
 738   { 0x8773, "ICC_Profile"},
 739   { 0x8822, "ExposureProgram"},
 740   { 0x8824, "SpectralSensity"},
 741   { 0x8828, "OECF"},
 742   { 0x8825, "GPS_IFD_Pointer"},
 743   { 0x8827, "ISOSpeedRatings"},
 744   { 0x8828, "OECF"},
 745   { 0x9000, "ExifVersion"},
 746   { 0x9003, "DateTimeOriginal"},
 747   { 0x9004, "DateTimeDigitized"},
 748   { 0x9101, "ComponentsConfiguration"},
 749   { 0x9102, "CompressedBitsPerPixel"},
 750   { 0x9201, "ShutterSpeedValue"},
 751   { 0x9202, "ApertureValue"},
 752   { 0x9203, "BrightnessValue"},
 753   { 0x9204, "ExposureBiasValue"},
 754   { 0x9205, "MaxApertureValue"},
 755   { 0x9206, "SubjectDistance"},
 756   { 0x9207, "MeteringMode"},
 757   { 0x9208, "LightSource"},
 758   { 0x9209, "Flash"},
 759   { 0x920A, "FocalLength"},
 760   { 0x920B, "FlashEnergy"},                 /* 0xA20B  in JPEG   */
 761   { 0x920C, "SpatialFrequencyResponse"},    /* 0xA20C    -  -    */
 762   { 0x920D, "Noise"},
 763   { 0x920E, "FocalPlaneXResolution"},       /* 0xA20E    -  -    */
 764   { 0x920F, "FocalPlaneYResolution"},       /* 0xA20F    -  -    */
 765   { 0x9210, "FocalPlaneResolutionUnit"},    /* 0xA210    -  -    */
 766   { 0x9211, "ImageNumber"},
 767   { 0x9212, "SecurityClassification"},
 768   { 0x9213, "ImageHistory"},
 769   { 0x9214, "SubjectLocation"},             /* 0xA214    -  -    */
 770   { 0x9215, "ExposureIndex"},               /* 0xA215    -  -    */
 771   { 0x9216, "TIFF/EPStandardID"},
 772   { 0x9217, "SensingMethod"},               /* 0xA217    -  -    */
 773   { 0x923F, "StoNits"},
 774   { 0x927C, "MakerNote"},
 775   { 0x9286, "UserComment"},
 776   { 0x9290, "SubSecTime"},
 777   { 0x9291, "SubSecTimeOriginal"},
 778   { 0x9292, "SubSecTimeDigitized"},
 779   { 0x935C, "ImageSourceData"},             /* "Adobe Photoshop Document Data Block": 8BIM... */
 780   { 0x9c9b, "Title" },                      /* Win XP specific, Unicode  */
 781   { 0x9c9c, "Comments" },                   /* Win XP specific, Unicode  */
 782   { 0x9c9d, "Author" },                     /* Win XP specific, Unicode  */
 783   { 0x9c9e, "Keywords" },                   /* Win XP specific, Unicode  */
 784   { 0x9c9f, "Subject" },                    /* Win XP specific, Unicode, not to be confused with SubjectDistance and SubjectLocation */
 785   { 0xA000, "FlashPixVersion"},
 786   { 0xA001, "ColorSpace"},
 787   { 0xA002, "ExifImageWidth"},
 788   { 0xA003, "ExifImageLength"},
 789   { 0xA004, "RelatedSoundFile"},
 790   { 0xA005, "InteroperabilityOffset"},
 791   { 0xA20B, "FlashEnergy"},                 /* 0x920B in TIFF/EP */
 792   { 0xA20C, "SpatialFrequencyResponse"},    /* 0x920C    -  -    */
 793   { 0xA20D, "Noise"},
 794   { 0xA20E, "FocalPlaneXResolution"},           /* 0x920E    -  -    */
 795   { 0xA20F, "FocalPlaneYResolution"},       /* 0x920F    -  -    */
 796   { 0xA210, "FocalPlaneResolutionUnit"},    /* 0x9210    -  -    */
 797   { 0xA211, "ImageNumber"},
 798   { 0xA212, "SecurityClassification"},
 799   { 0xA213, "ImageHistory"},
 800   { 0xA214, "SubjectLocation"},             /* 0x9214    -  -    */
 801   { 0xA215, "ExposureIndex"},               /* 0x9215    -  -    */
 802   { 0xA216, "TIFF/EPStandardID"},
 803   { 0xA217, "SensingMethod"},               /* 0x9217    -  -    */
 804   { 0xA300, "FileSource"},
 805   { 0xA301, "SceneType"},
 806   { 0xA302, "CFAPattern"},
 807   { 0xA401, "CustomRendered"},
 808   { 0xA402, "ExposureMode"},
 809   { 0xA403, "WhiteBalance"},
 810   { 0xA404, "DigitalZoomRatio"},
 811   { 0xA405, "FocalLengthIn35mmFilm"},
 812   { 0xA406, "SceneCaptureType"},
 813   { 0xA407, "GainControl"},
 814   { 0xA408, "Contrast"},
 815   { 0xA409, "Saturation"},
 816   { 0xA40A, "Sharpness"},
 817   { 0xA40B, "DeviceSettingDescription"},
 818   { 0xA40C, "SubjectDistanceRange"},
 819   { 0xA420, "ImageUniqueID"},
 820   TAG_TABLE_END
 821 } ;
 822 
 823 static tag_info_array tag_table_GPS = {
 824   { 0x0000, "GPSVersion"},
 825   { 0x0001, "GPSLatitudeRef"},
 826   { 0x0002, "GPSLatitude"},
 827   { 0x0003, "GPSLongitudeRef"},
 828   { 0x0004, "GPSLongitude"},
 829   { 0x0005, "GPSAltitudeRef"},
 830   { 0x0006, "GPSAltitude"},
 831   { 0x0007, "GPSTimeStamp"},
 832   { 0x0008, "GPSSatellites"},
 833   { 0x0009, "GPSStatus"},
 834   { 0x000A, "GPSMeasureMode"},
 835   { 0x000B, "GPSDOP"},
 836   { 0x000C, "GPSSpeedRef"},
 837   { 0x000D, "GPSSpeed"},
 838   { 0x000E, "GPSTrackRef"},
 839   { 0x000F, "GPSTrack"},
 840   { 0x0010, "GPSImgDirectionRef"},
 841   { 0x0011, "GPSImgDirection"},
 842   { 0x0012, "GPSMapDatum"},
 843   { 0x0013, "GPSDestLatitudeRef"},
 844   { 0x0014, "GPSDestLatitude"},
 845   { 0x0015, "GPSDestLongitudeRef"},
 846   { 0x0016, "GPSDestLongitude"},
 847   { 0x0017, "GPSDestBearingRef"},
 848   { 0x0018, "GPSDestBearing"},
 849   { 0x0019, "GPSDestDistanceRef"},
 850   { 0x001A, "GPSDestDistance"},
 851   { 0x001B, "GPSProcessingMode"},
 852   { 0x001C, "GPSAreaInformation"},
 853   { 0x001D, "GPSDateStamp"},
 854   { 0x001E, "GPSDifferential"},
 855   TAG_TABLE_END
 856 };
 857 
 858 static tag_info_array tag_table_IOP = {
 859   { 0x0001, "InterOperabilityIndex"}, /* should be 'R98' or 'THM' */
 860   { 0x0002, "InterOperabilityVersion"},
 861   { 0x1000, "RelatedFileFormat"},
 862   { 0x1001, "RelatedImageWidth"},
 863   { 0x1002, "RelatedImageHeight"},
 864   TAG_TABLE_END
 865 };
 866 
 867 static tag_info_array tag_table_VND_CANON = {
 868   { 0x0001, "ModeArray"}, /* guess */
 869   { 0x0004, "ImageInfo"}, /* guess */
 870   { 0x0006, "ImageType"},
 871   { 0x0007, "FirmwareVersion"},
 872   { 0x0008, "ImageNumber"},
 873   { 0x0009, "OwnerName"},
 874   { 0x000C, "Camera"},
 875   { 0x000F, "CustomFunctions"},
 876   TAG_TABLE_END
 877 };
 878 
 879 static tag_info_array tag_table_VND_CASIO = {
 880   { 0x0001, "RecordingMode"},
 881   { 0x0002, "Quality"},
 882   { 0x0003, "FocusingMode"},
 883   { 0x0004, "FlashMode"},
 884   { 0x0005, "FlashIntensity"},
 885   { 0x0006, "ObjectDistance"},
 886   { 0x0007, "WhiteBalance"},
 887   { 0x000A, "DigitalZoom"},
 888   { 0x000B, "Sharpness"},
 889   { 0x000C, "Contrast"},
 890   { 0x000D, "Saturation"},
 891   { 0x0014, "CCDSensitivity"},
 892   TAG_TABLE_END
 893 };
 894 
 895 static tag_info_array tag_table_VND_FUJI = {
 896   { 0x0000, "Version"},
 897   { 0x1000, "Quality"},
 898   { 0x1001, "Sharpness"},
 899   { 0x1002, "WhiteBalance"},
 900   { 0x1003, "Color"},
 901   { 0x1004, "Tone"},
 902   { 0x1010, "FlashMode"},
 903   { 0x1011, "FlashStrength"},
 904   { 0x1020, "Macro"},
 905   { 0x1021, "FocusMode"},
 906   { 0x1030, "SlowSync"},
 907   { 0x1031, "PictureMode"},
 908   { 0x1100, "ContTake"},
 909   { 0x1300, "BlurWarning"},
 910   { 0x1301, "FocusWarning"},
 911   { 0x1302, "AEWarning "},
 912   TAG_TABLE_END
 913 };
 914 
 915 static tag_info_array tag_table_VND_NIKON = {
 916   { 0x0003, "Quality"},
 917   { 0x0004, "ColorMode"},
 918   { 0x0005, "ImageAdjustment"},
 919   { 0x0006, "CCDSensitivity"},
 920   { 0x0007, "WhiteBalance"},
 921   { 0x0008, "Focus"},
 922   { 0x000a, "DigitalZoom"},
 923   { 0x000b, "Converter"},
 924   TAG_TABLE_END
 925 };
 926 
 927 static tag_info_array tag_table_VND_NIKON_990 = {
 928   { 0x0001, "Version"},
 929   { 0x0002, "ISOSetting"},
 930   { 0x0003, "ColorMode"},
 931   { 0x0004, "Quality"},
 932   { 0x0005, "WhiteBalance"},
 933   { 0x0006, "ImageSharpening"},
 934   { 0x0007, "FocusMode"},
 935   { 0x0008, "FlashSetting"},
 936   { 0x000F, "ISOSelection"},
 937   { 0x0080, "ImageAdjustment"},
 938   { 0x0082, "AuxiliaryLens"},
 939   { 0x0085, "ManualFocusDistance"},
 940   { 0x0086, "DigitalZoom"},
 941   { 0x0088, "AFFocusPosition"},
 942   { 0x0010, "DataDump"},
 943   TAG_TABLE_END
 944 };
 945 
 946 static tag_info_array tag_table_VND_OLYMPUS = {
 947   { 0x0200, "SpecialMode"},
 948   { 0x0201, "JPEGQuality"},
 949   { 0x0202, "Macro"},
 950   { 0x0204, "DigitalZoom"},
 951   { 0x0207, "SoftwareRelease"},
 952   { 0x0208, "PictureInfo"},
 953   { 0x0209, "CameraId"},
 954   { 0x0F00, "DataDump"},
 955   TAG_TABLE_END
 956 };
 957 
 958 typedef enum mn_byte_order_t {
 959         MN_ORDER_INTEL    = 0,
 960         MN_ORDER_MOTOROLA = 1,
 961         MN_ORDER_NORMAL
 962 } mn_byte_order_t;
 963 
 964 typedef enum mn_offset_mode_t {
 965         MN_OFFSET_NORMAL,
 966         MN_OFFSET_MAKER,
 967         MN_OFFSET_GUESS
 968 } mn_offset_mode_t;
 969 
 970 typedef struct {
 971         tag_table_type   tag_table;
 972         char *           make;
 973         char *           model;
 974         char *           id_string;
 975         int              id_string_len;
 976         int              offset;
 977         mn_byte_order_t  byte_order;
 978         mn_offset_mode_t offset_mode;
 979 } maker_note_type;
 980 
 981 static const maker_note_type maker_note_array[] = {
 982   { tag_table_VND_CANON,     "Canon",                   NULL,  NULL,                       0,  0,  MN_ORDER_INTEL,    MN_OFFSET_GUESS},
 983 /*  { tag_table_VND_CANON,     "Canon",                   NULL,  NULL,                       0,  0,  MN_ORDER_NORMAL,   MN_OFFSET_NORMAL},*/
 984   { tag_table_VND_CASIO,     "CASIO",                   NULL,  NULL,                       0,  0,  MN_ORDER_MOTOROLA, MN_OFFSET_NORMAL},
 985   { tag_table_VND_FUJI,      "FUJIFILM",                NULL,  "FUJIFILM\x0C\x00\x00\x00", 12, 12, MN_ORDER_INTEL,    MN_OFFSET_MAKER},
 986   { tag_table_VND_NIKON,     "NIKON",                   NULL,  "Nikon\x00\x01\x00",        8,  8,  MN_ORDER_NORMAL,   MN_OFFSET_NORMAL},
 987   { tag_table_VND_NIKON_990, "NIKON",                   NULL,  NULL,                       0,  0,  MN_ORDER_NORMAL,   MN_OFFSET_NORMAL},
 988   { tag_table_VND_OLYMPUS,   "OLYMPUS OPTICAL CO.,LTD", NULL,  "OLYMP\x00\x01\x00",        8,  8,  MN_ORDER_NORMAL,   MN_OFFSET_NORMAL},
 989 };
 990 /* }}} */
 991 
 992 /* {{{ exif_get_tagname
 993         Get headername for tag_num or NULL if not defined */
 994 static char * exif_get_tagname(int tag_num, char *ret, int len, tag_table_type tag_table)
 995 {
 996         int i, t;
 997         char tmp[32];
 998 
 999         for (i = 0; (t = tag_table[i].Tag) != TAG_END_OF_LIST; i++) {
1000                 if (t == tag_num) {
1001                         if (ret && len)  {
1002                                 strlcpy(ret, tag_table[i].Desc, abs(len));
1003                                 if (len < 0) {
1004                                         memset(ret + strlen(ret), ' ', -len - strlen(ret) - 1);
1005                                         ret[-len - 1] = '\0';
1006                                 }
1007                                 return ret;
1008                         }
1009                         return tag_table[i].Desc;
1010                 }
1011         }
1012 
1013         if (ret && len) {
1014                 snprintf(tmp, sizeof(tmp), "UndefinedTag:0x%04X", tag_num);
1015                 strlcpy(ret, tmp, abs(len));
1016                 if (len < 0) {
1017                         memset(ret + strlen(ret), ' ', -len - strlen(ret) - 1);
1018                         ret[-len - 1] = '\0';
1019                 }
1020                 return ret;
1021         }
1022         return "";
1023 }
1024 /* }}} */
1025 
1026 /* {{{ exif_char_dump
1027  * Do not use! This is a debug function... */
1028 #ifdef EXIF_DEBUG
1029 static unsigned char* exif_char_dump(unsigned char * addr, int len, int offset)
1030 {
1031         static unsigned char buf[4096+1];
1032         static unsigned char tmp[20];
1033         int c, i, p=0, n = 5+31;
1034 
1035         p += slprintf(buf+p, sizeof(buf)-p, "\nDump Len: %08X (%d)", len, len);
1036         if (len) {
1037                 for(i=0; i<len+15 && p+n<=sizeof(buf); i++) {
1038                         if (i%16==0) {
1039                                 p += slprintf(buf+p, sizeof(buf)-p, "\n%08X: ", i+offset);
1040                         }
1041                         if (i<len) {
1042                                 c = *addr++;
1043                                 p += slprintf(buf+p, sizeof(buf)-p, "%02X ", c);
1044                                 tmp[i%16] = c>=32 ? c : '.';
1045                                 tmp[(i%16)+1] = '\0';
1046                         } else {
1047                                 p += slprintf(buf+p, sizeof(buf)-p, "   ");
1048                         }
1049                         if (i%16==15) {
1050                                 p += slprintf(buf+p, sizeof(buf)-p, "    %s", tmp);
1051                                 if (i>=len) {
1052                                         break;
1053                                 }
1054                         }
1055                 }
1056         }
1057         buf[sizeof(buf)-1] = '\0';
1058         return buf;
1059 }
1060 #endif
1061 /* }}} */
1062 
1063 /* {{{ php_jpg_get16
1064    Get 16 bits motorola order (always) for jpeg header stuff.
1065 */
1066 static int php_jpg_get16(void *value)
1067 {
1068         return (((uchar *)value)[0] << 8) | ((uchar *)value)[1];
1069 }
1070 /* }}} */
1071 
1072 /* {{{ php_ifd_get16u
1073  * Convert a 16 bit unsigned value from file's native byte order */
1074 static int php_ifd_get16u(void *value, int motorola_intel)
1075 {
1076         if (motorola_intel) {
1077                 return (((uchar *)value)[0] << 8) | ((uchar *)value)[1];
1078         } else {
1079                 return (((uchar *)value)[1] << 8) | ((uchar *)value)[0];
1080         }
1081 }
1082 /* }}} */
1083 
1084 /* {{{ php_ifd_get16s
1085  * Convert a 16 bit signed value from file's native byte order */
1086 static signed short php_ifd_get16s(void *value, int motorola_intel)
1087 {
1088         return (signed short)php_ifd_get16u(value, motorola_intel);
1089 }
1090 /* }}} */
1091 
1092 /* {{{ php_ifd_get32s
1093  * Convert a 32 bit signed value from file's native byte order */
1094 static int php_ifd_get32s(void *value, int motorola_intel)
1095 {
1096         if (motorola_intel) {
1097                 return  (((char  *)value)[0] << 24)
1098                           | (((uchar *)value)[1] << 16)
1099                           | (((uchar *)value)[2] << 8 )
1100                           | (((uchar *)value)[3]      );
1101         } else {
1102                 return  (((char  *)value)[3] << 24)
1103                           | (((uchar *)value)[2] << 16)
1104                           | (((uchar *)value)[1] << 8 )
1105                           | (((uchar *)value)[0]      );
1106         }
1107 }
1108 /* }}} */
1109 
1110 /* {{{ php_ifd_get32u
1111  * Write 32 bit unsigned value to data */
1112 static unsigned php_ifd_get32u(void *value, int motorola_intel)
1113 {
1114         return (unsigned)php_ifd_get32s(value, motorola_intel) & 0xffffffff;
1115 }
1116 /* }}} */
1117 
1118 /* {{{ php_ifd_set16u
1119  * Write 16 bit unsigned value to data */
1120 static void php_ifd_set16u(char *data, unsigned int value, int motorola_intel)
1121 {
1122         if (motorola_intel) {
1123                 data[0] = (value & 0xFF00) >> 8;
1124                 data[1] = (value & 0x00FF);
1125         } else {
1126                 data[1] = (value & 0xFF00) >> 8;
1127                 data[0] = (value & 0x00FF);
1128         }
1129 }
1130 /* }}} */
1131 
1132 /* {{{ php_ifd_set32u
1133  * Convert a 32 bit unsigned value from file's native byte order */
1134 static void php_ifd_set32u(char *data, size_t value, int motorola_intel)
1135 {
1136         if (motorola_intel) {
1137                 data[0] = (value & 0xFF000000) >> 24;
1138                 data[1] = (value & 0x00FF0000) >> 16;
1139                 data[2] = (value & 0x0000FF00) >>  8;
1140                 data[3] = (value & 0x000000FF);
1141         } else {
1142                 data[3] = (value & 0xFF000000) >> 24;
1143                 data[2] = (value & 0x00FF0000) >> 16;
1144                 data[1] = (value & 0x0000FF00) >>  8;
1145                 data[0] = (value & 0x000000FF);
1146         }
1147 }
1148 /* }}} */
1149 
1150 #ifdef EXIF_DEBUG
1151 char * exif_dump_data(int *dump_free, int format, int components, int length, int motorola_intel, char *value_ptr) /* {{{ */
1152 {
1153         char *dump;
1154         int len;
1155 
1156         *dump_free = 0;
1157         if (format == TAG_FMT_STRING) {
1158                 return value_ptr ? value_ptr : "<no data>";
1159         }
1160         if (format == TAG_FMT_UNDEFINED) {
1161                 return "<undefined>\n";
1162         }
1163         if (format == TAG_FMT_IFD) {
1164                 return "";
1165         }
1166         if (format == TAG_FMT_SINGLE || format == TAG_FMT_DOUBLE) {
1167                 return "<not implemented>";
1168         }
1169         *dump_free = 1;
1170         if (components > 1) {
1171                 len = spprintf(&dump, 0, "(%d,%d) {", components, length);
1172         } else {
1173                 len = spprintf(&dump, 0, "{");
1174         }
1175         while(components > 0) {
1176                 switch(format) {
1177                         case TAG_FMT_BYTE:
1178                         case TAG_FMT_UNDEFINED:
1179                         case TAG_FMT_STRING:
1180                         case TAG_FMT_SBYTE:
1181                                 dump = erealloc(dump, len + 4 + 1);
1182                                 snprintf(dump + len, 4 + 1, "0x%02X", *value_ptr);
1183                                 len += 4;
1184                                 value_ptr++;
1185                                 break;
1186                         case TAG_FMT_USHORT:
1187                         case TAG_FMT_SSHORT:
1188                                 dump = erealloc(dump, len + 6 + 1);
1189                                 snprintf(dump + len, 6 + 1, "0x%04X", php_ifd_get16s(value_ptr, motorola_intel));
1190                                 len += 6;
1191                                 value_ptr += 2;
1192                                 break;
1193                         case TAG_FMT_ULONG:
1194                         case TAG_FMT_SLONG:
1195                                 dump = erealloc(dump, len + 6 + 1);
1196                                 snprintf(dump + len, 6 + 1, "0x%04X", php_ifd_get32s(value_ptr, motorola_intel));
1197                                 len += 6;
1198                                 value_ptr += 4;
1199                                 break;
1200                         case TAG_FMT_URATIONAL:
1201                         case TAG_FMT_SRATIONAL:
1202                                 dump = erealloc(dump, len + 13 + 1);
1203                                 snprintf(dump + len, 13 + 1, "0x%04X/0x%04X", php_ifd_get32s(value_ptr, motorola_intel), php_ifd_get32s(value_ptr+4, motorola_intel));
1204                                 len += 13;
1205                                 value_ptr += 8;
1206                                 break;
1207                 }
1208                 if (components > 0) {
1209                         dump = erealloc(dump, len + 2 + 1);
1210                         snprintf(dump + len, 2 + 1, ", ");
1211                         len += 2;
1212                         components--;
1213                 } else{
1214                         break;
1215                 }
1216         }
1217         dump = erealloc(dump, len + 1 + 1);
1218         snprintf(dump + len, 1 + 1, "}");
1219         return dump;
1220 }
1221 /* }}} */
1222 #endif
1223 
1224 /* {{{ exif_convert_any_format
1225  * Evaluate number, be it int, rational, or float from directory. */
1226 static double exif_convert_any_format(void *value, int format, int motorola_intel)
1227 {
1228         int             s_den;
1229         unsigned        u_den;
1230 
1231         switch(format) {
1232                 case TAG_FMT_SBYTE:     return *(signed char *)value;
1233                 case TAG_FMT_BYTE:      return *(uchar *)value;
1234 
1235                 case TAG_FMT_USHORT:    return php_ifd_get16u(value, motorola_intel);
1236                 case TAG_FMT_ULONG:     return php_ifd_get32u(value, motorola_intel);
1237 
1238                 case TAG_FMT_URATIONAL:
1239                         u_den = php_ifd_get32u(4+(char *)value, motorola_intel);
1240                         if (u_den == 0) {
1241                                 return 0;
1242                         } else {
1243                                 return (double)php_ifd_get32u(value, motorola_intel) / u_den;
1244                         }
1245 
1246                 case TAG_FMT_SRATIONAL:
1247                         s_den = php_ifd_get32s(4+(char *)value, motorola_intel);
1248                         if (s_den == 0) {
1249                                 return 0;
1250                         } else {
1251                                 return (double)php_ifd_get32s(value, motorola_intel) / s_den;
1252                         }
1253 
1254                 case TAG_FMT_SSHORT:    return (signed short)php_ifd_get16u(value, motorola_intel);
1255                 case TAG_FMT_SLONG:     return php_ifd_get32s(value, motorola_intel);
1256 
1257                 /* Not sure if this is correct (never seen float used in Exif format) */
1258                 case TAG_FMT_SINGLE:
1259 #ifdef EXIF_DEBUG
1260                         php_error_docref(NULL, E_NOTICE, "Found value of type single");
1261 #endif
1262                         return (double)*(float *)value;
1263                 case TAG_FMT_DOUBLE:
1264 #ifdef EXIF_DEBUG
1265                         php_error_docref(NULL, E_NOTICE, "Found value of type double");
1266 #endif
1267                         return *(double *)value;
1268         }
1269         return 0;
1270 }
1271 /* }}} */
1272 
1273 /* {{{ exif_convert_any_to_int
1274  * Evaluate number, be it int, rational, or float from directory. */
1275 static size_t exif_convert_any_to_int(void *value, int format, int motorola_intel)
1276 {
1277         int             s_den;
1278         unsigned        u_den;
1279 
1280         switch(format) {
1281                 case TAG_FMT_SBYTE:     return *(signed char *)value;
1282                 case TAG_FMT_BYTE:      return *(uchar *)value;
1283 
1284                 case TAG_FMT_USHORT:    return php_ifd_get16u(value, motorola_intel);
1285                 case TAG_FMT_ULONG:     return php_ifd_get32u(value, motorola_intel);
1286 
1287                 case TAG_FMT_URATIONAL:
1288                         u_den = php_ifd_get32u(4+(char *)value, motorola_intel);
1289                         if (u_den == 0) {
1290                                 return 0;
1291                         } else {
1292                                 return php_ifd_get32u(value, motorola_intel) / u_den;
1293                         }
1294 
1295                 case TAG_FMT_SRATIONAL:
1296                         s_den = php_ifd_get32s(4+(char *)value, motorola_intel);
1297                         if (s_den == 0) {
1298                                 return 0;
1299                         } else {
1300                                 return php_ifd_get32s(value, motorola_intel) / s_den;
1301                         }
1302 
1303                 case TAG_FMT_SSHORT:    return php_ifd_get16u(value, motorola_intel);
1304                 case TAG_FMT_SLONG:     return php_ifd_get32s(value, motorola_intel);
1305 
1306                 /* Not sure if this is correct (never seen float used in Exif format) */
1307                 case TAG_FMT_SINGLE:
1308 #ifdef EXIF_DEBUG
1309                         php_error_docref(NULL, E_NOTICE, "Found value of type single");
1310 #endif
1311                         return (size_t)*(float *)value;
1312                 case TAG_FMT_DOUBLE:
1313 #ifdef EXIF_DEBUG
1314                         php_error_docref(NULL, E_NOTICE, "Found value of type double");
1315 #endif
1316                         return (size_t)*(double *)value;
1317         }
1318         return 0;
1319 }
1320 /* }}} */
1321 
1322 /* {{{ struct image_info_value, image_info_list
1323 */
1324 #ifndef WORD
1325 #define WORD unsigned short
1326 #endif
1327 #ifndef DWORD
1328 #define DWORD unsigned int
1329 #endif
1330 
1331 typedef struct {
1332         int             num;
1333         int             den;
1334 } signed_rational;
1335 
1336 typedef struct {
1337         unsigned int    num;
1338         unsigned int    den;
1339 } unsigned_rational;
1340 
1341 typedef union _image_info_value {
1342         char                            *s;
1343         unsigned            u;
1344         int                             i;
1345         float               f;
1346         double              d;
1347         signed_rational         sr;
1348         unsigned_rational       ur;
1349         union _image_info_value   *list;
1350 } image_info_value;
1351 
1352 typedef struct {
1353         WORD                tag;
1354         WORD                format;
1355         DWORD               length;
1356         DWORD               dummy;  /* value ptr of tiff directory entry */
1357         char                            *name;
1358         image_info_value    value;
1359 } image_info_data;
1360 
1361 typedef struct {
1362         int                 count;
1363         image_info_data         *list;
1364 } image_info_list;
1365 /* }}} */
1366 
1367 /* {{{ exif_get_sectionname
1368  Returns the name of a section
1369 */
1370 #define SECTION_FILE        0
1371 #define SECTION_COMPUTED    1
1372 #define SECTION_ANY_TAG     2
1373 #define SECTION_IFD0        3
1374 #define SECTION_THUMBNAIL   4
1375 #define SECTION_COMMENT     5
1376 #define SECTION_APP0        6
1377 #define SECTION_EXIF        7
1378 #define SECTION_FPIX        8
1379 #define SECTION_GPS         9
1380 #define SECTION_INTEROP     10
1381 #define SECTION_APP12       11
1382 #define SECTION_WINXP       12
1383 #define SECTION_MAKERNOTE   13
1384 #define SECTION_COUNT       14
1385 
1386 #define FOUND_FILE          (1<<SECTION_FILE)
1387 #define FOUND_COMPUTED      (1<<SECTION_COMPUTED)
1388 #define FOUND_ANY_TAG       (1<<SECTION_ANY_TAG)
1389 #define FOUND_IFD0          (1<<SECTION_IFD0)
1390 #define FOUND_THUMBNAIL     (1<<SECTION_THUMBNAIL)
1391 #define FOUND_COMMENT       (1<<SECTION_COMMENT)
1392 #define FOUND_APP0          (1<<SECTION_APP0)
1393 #define FOUND_EXIF          (1<<SECTION_EXIF)
1394 #define FOUND_FPIX          (1<<SECTION_FPIX)
1395 #define FOUND_GPS           (1<<SECTION_GPS)
1396 #define FOUND_INTEROP       (1<<SECTION_INTEROP)
1397 #define FOUND_APP12         (1<<SECTION_APP12)
1398 #define FOUND_WINXP         (1<<SECTION_WINXP)
1399 #define FOUND_MAKERNOTE     (1<<SECTION_MAKERNOTE)
1400 
1401 static char *exif_get_sectionname(int section)
1402 {
1403         switch(section) {
1404                 case SECTION_FILE:      return "FILE";
1405                 case SECTION_COMPUTED:  return "COMPUTED";
1406                 case SECTION_ANY_TAG:   return "ANY_TAG";
1407                 case SECTION_IFD0:      return "IFD0";
1408                 case SECTION_THUMBNAIL: return "THUMBNAIL";
1409                 case SECTION_COMMENT:   return "COMMENT";
1410                 case SECTION_APP0:      return "APP0";
1411                 case SECTION_EXIF:      return "EXIF";
1412                 case SECTION_FPIX:      return "FPIX";
1413                 case SECTION_GPS:       return "GPS";
1414                 case SECTION_INTEROP:   return "INTEROP";
1415                 case SECTION_APP12:     return "APP12";
1416                 case SECTION_WINXP:     return "WINXP";
1417                 case SECTION_MAKERNOTE: return "MAKERNOTE";
1418         }
1419         return "";
1420 }
1421 
1422 static tag_table_type exif_get_tag_table(int section)
1423 {
1424         switch(section) {
1425                 case SECTION_FILE:      return &tag_table_IFD[0];
1426                 case SECTION_COMPUTED:  return &tag_table_IFD[0];
1427                 case SECTION_ANY_TAG:   return &tag_table_IFD[0];
1428                 case SECTION_IFD0:      return &tag_table_IFD[0];
1429                 case SECTION_THUMBNAIL: return &tag_table_IFD[0];
1430                 case SECTION_COMMENT:   return &tag_table_IFD[0];
1431                 case SECTION_APP0:      return &tag_table_IFD[0];
1432                 case SECTION_EXIF:      return &tag_table_IFD[0];
1433                 case SECTION_FPIX:      return &tag_table_IFD[0];
1434                 case SECTION_GPS:       return &tag_table_GPS[0];
1435                 case SECTION_INTEROP:   return &tag_table_IOP[0];
1436                 case SECTION_APP12:     return &tag_table_IFD[0];
1437                 case SECTION_WINXP:     return &tag_table_IFD[0];
1438         }
1439         return &tag_table_IFD[0];
1440 }
1441 /* }}} */
1442 
1443 /* {{{ exif_get_sectionlist
1444    Return list of sectionnames specified by sectionlist. Return value must be freed
1445 */
1446 static char *exif_get_sectionlist(int sectionlist)
1447 {
1448         int i, len, ml = 0;
1449         char *sections;
1450 
1451         for(i=0; i<SECTION_COUNT; i++) {
1452                 ml += strlen(exif_get_sectionname(i))+2;
1453         }
1454         sections = safe_emalloc(ml, 1, 1);
1455         sections[0] = '\0';
1456         len = 0;
1457         for(i=0; i<SECTION_COUNT; i++) {
1458                 if (sectionlist&(1<<i)) {
1459                         snprintf(sections+len, ml-len, "%s, ", exif_get_sectionname(i));
1460                         len = strlen(sections);
1461                 }
1462         }
1463         if (len>2)
1464                 sections[len-2] = '\0';
1465         return sections;
1466 }
1467 /* }}} */
1468 
1469 /* {{{ struct image_info_type
1470    This structure stores Exif header image elements in a simple manner
1471    Used to store camera data as extracted from the various ways that it can be
1472    stored in a nexif header
1473 */
1474 
1475 typedef struct {
1476         int     type;
1477         size_t  size;
1478         uchar   *data;
1479 } file_section;
1480 
1481 typedef struct {
1482         int             count;
1483         file_section    *list;
1484 } file_section_list;
1485 
1486 typedef struct {
1487         image_filetype  filetype;
1488         size_t          width, height;
1489         size_t          size;
1490         size_t          offset;
1491         char            *data;
1492 } thumbnail_data;
1493 
1494 typedef struct {
1495         char                    *value;
1496         size_t                  size;
1497         int                             tag;
1498 } xp_field_type;
1499 
1500 typedef struct {
1501         int             count;
1502         xp_field_type   *list;
1503 } xp_field_list;
1504 
1505 /* This structure is used to store a section of a Jpeg file. */
1506 typedef struct {
1507         php_stream      *infile;
1508         char            *FileName;
1509         time_t          FileDateTime;
1510         size_t          FileSize;
1511         image_filetype  FileType;
1512         int             Height, Width;
1513         int             IsColor;
1514 
1515         char            *make;
1516         char            *model;
1517 
1518         float           ApertureFNumber;
1519         float           ExposureTime;
1520         double          FocalplaneUnits;
1521         float           CCDWidth;
1522         double          FocalplaneXRes;
1523         size_t          ExifImageWidth;
1524         float           FocalLength;
1525         float           Distance;
1526 
1527         int             motorola_intel; /* 1 Motorola; 0 Intel */
1528 
1529         char            *UserComment;
1530         int             UserCommentLength;
1531         char            *UserCommentEncoding;
1532         char            *encode_unicode;
1533         char            *decode_unicode_be;
1534         char            *decode_unicode_le;
1535         char            *encode_jis;
1536         char            *decode_jis_be;
1537         char            *decode_jis_le;
1538         char            *Copyright;/* EXIF standard defines Copyright as "<Photographer> [ '\0' <Editor> ] ['\0']" */
1539         char            *CopyrightPhotographer;
1540         char            *CopyrightEditor;
1541 
1542         xp_field_list   xp_fields;
1543 
1544         thumbnail_data  Thumbnail;
1545         /* other */
1546         int             sections_found; /* FOUND_<marker> */
1547         image_info_list info_list[SECTION_COUNT];
1548         /* for parsing */
1549         int             read_thumbnail;
1550         int             read_all;
1551         int             ifd_nesting_level;
1552         /* internal */
1553         file_section_list       file;
1554 } image_info_type;
1555 /* }}} */
1556 
1557 /* {{{ exif_error_docref */
1558 static void exif_error_docref(const char *docref EXIFERR_DC, const image_info_type *ImageInfo, int type, const char *format, ...)
1559 {
1560         va_list args;
1561 
1562         va_start(args, format);
1563 #ifdef EXIF_DEBUG
1564         {
1565                 char *buf;
1566 
1567                 spprintf(&buf, 0, "%s(%d): %s", _file, _line, format);
1568                 php_verror(docref, ImageInfo->FileName?ImageInfo->FileName:"", type, buf, args);
1569                 efree(buf);
1570         }
1571 #else
1572         php_verror(docref, ImageInfo->FileName?ImageInfo->FileName:"", type, format, args);
1573 #endif
1574         va_end(args);
1575 }
1576 /* }}} */
1577 
1578 /* {{{ jpeg_sof_info
1579  */
1580 typedef struct {
1581         int     bits_per_sample;
1582         size_t  width;
1583         size_t  height;
1584         int     num_components;
1585 } jpeg_sof_info;
1586 /* }}} */
1587 
1588 /* {{{ exif_file_sections_add
1589  Add a file_section to image_info
1590  returns the used block or -1. if size>0 and data == NULL buffer of size is allocated
1591 */
1592 static int exif_file_sections_add(image_info_type *ImageInfo, int type, size_t size, uchar *data)
1593 {
1594         file_section    *tmp;
1595         int             count = ImageInfo->file.count;
1596 
1597         tmp = safe_erealloc(ImageInfo->file.list, (count+1), sizeof(file_section), 0);
1598         ImageInfo->file.list = tmp;
1599         ImageInfo->file.list[count].type = 0xFFFF;
1600         ImageInfo->file.list[count].data = NULL;
1601         ImageInfo->file.list[count].size = 0;
1602         ImageInfo->file.count = count+1;
1603         if (!size) {
1604                 data = NULL;
1605         } else if (data == NULL) {
1606                 data = safe_emalloc(size, 1, 0);
1607         }
1608         ImageInfo->file.list[count].type = type;
1609         ImageInfo->file.list[count].data = data;
1610         ImageInfo->file.list[count].size = size;
1611         return count;
1612 }
1613 /* }}} */
1614 
1615 /* {{{ exif_file_sections_realloc
1616  Reallocate a file section returns 0 on success and -1 on failure
1617 */
1618 static int exif_file_sections_realloc(image_info_type *ImageInfo, int section_index, size_t size)
1619 {
1620         void *tmp;
1621 
1622         /* This is not a malloc/realloc check. It is a plausibility check for the
1623          * function parameters (requirements engineering).
1624          */
1625         if (section_index >= ImageInfo->file.count) {
1626                 EXIF_ERRLOG_FSREALLOC(ImageInfo)
1627                 return -1;
1628         }
1629         tmp = safe_erealloc(ImageInfo->file.list[section_index].data, 1, size, 0);
1630         ImageInfo->file.list[section_index].data = tmp;
1631         ImageInfo->file.list[section_index].size = size;
1632         return 0;
1633 }
1634 /* }}} */
1635 
1636 /* {{{ exif_file_section_free
1637    Discard all file_sections in ImageInfo
1638 */
1639 static int exif_file_sections_free(image_info_type *ImageInfo)
1640 {
1641         int i;
1642 
1643         if (ImageInfo->file.count) {
1644                 for (i=0; i<ImageInfo->file.count; i++) {
1645                         EFREE_IF(ImageInfo->file.list[i].data);
1646                 }
1647         }
1648         EFREE_IF(ImageInfo->file.list);
1649         ImageInfo->file.count = 0;
1650         return TRUE;
1651 }
1652 /* }}} */
1653 
1654 /* {{{ exif_iif_add_value
1655  Add a value to image_info
1656 */
1657 static void exif_iif_add_value(image_info_type *image_info, int section_index, char *name, int tag, int format, int length, void* value, int motorola_intel)
1658 {
1659         size_t idex;
1660         void *vptr;
1661         image_info_value *info_value;
1662         image_info_data  *info_data;
1663         image_info_data  *list;
1664 
1665         if (length < 0) {
1666                 return;
1667         }
1668 
1669         list = safe_erealloc(image_info->info_list[section_index].list, (image_info->info_list[section_index].count+1), sizeof(image_info_data), 0);
1670         image_info->info_list[section_index].list = list;
1671 
1672         info_data  = &image_info->info_list[section_index].list[image_info->info_list[section_index].count];
1673         memset(info_data, 0, sizeof(image_info_data));
1674         info_data->tag    = tag;
1675         info_data->format = format;
1676         info_data->length = length;
1677         info_data->name   = estrdup(name);
1678         info_value        = &info_data->value;
1679 
1680         switch (format) {
1681                 case TAG_FMT_STRING:
1682                         if (value) {
1683                                 length = php_strnlen(value, length);
1684                                 info_value->s = estrndup(value, length);
1685                                 info_data->length = length;
1686                         } else {
1687                                 info_data->length = 0;
1688                                 info_value->s = estrdup("");
1689                         }
1690                         break;
1691 
1692                 default:
1693                         /* Standard says more types possible but skip them...
1694                          * but allow users to handle data if they know how to
1695                          * So not return but use type UNDEFINED
1696                          * return;
1697                          */
1698                         info_data->tag = TAG_FMT_UNDEFINED;/* otherwise not freed from memory */
1699                 case TAG_FMT_SBYTE:
1700                 case TAG_FMT_BYTE:
1701                 /* in contrast to strings bytes do not need to allocate buffer for NULL if length==0 */
1702                         if (!length)
1703                                 break;
1704                 case TAG_FMT_UNDEFINED:
1705                         if (value) {
1706                                 /* do not recompute length here */
1707                                 info_value->s = estrndup(value, length);
1708                                 info_data->length = length;
1709                         } else {
1710                                 info_data->length = 0;
1711                                 info_value->s = estrdup("");
1712                         }
1713                         break;
1714 
1715                 case TAG_FMT_USHORT:
1716                 case TAG_FMT_ULONG:
1717                 case TAG_FMT_URATIONAL:
1718                 case TAG_FMT_SSHORT:
1719                 case TAG_FMT_SLONG:
1720                 case TAG_FMT_SRATIONAL:
1721                 case TAG_FMT_SINGLE:
1722                 case TAG_FMT_DOUBLE:
1723                         if (length==0) {
1724                                 break;
1725                         } else
1726                         if (length>1) {
1727                                 info_value->list = safe_emalloc(length, sizeof(image_info_value), 0);
1728                         } else {
1729                                 info_value = &info_data->value;
1730                         }
1731                         for (idex=0,vptr=value; idex<(size_t)length; idex++,vptr=(char *) vptr + php_tiff_bytes_per_format[format]) {
1732                                 if (length>1) {
1733                                         info_value = &info_data->value.list[idex];
1734                                 }
1735                                 switch (format) {
1736                                         case TAG_FMT_USHORT:
1737                                                 info_value->u = php_ifd_get16u(vptr, motorola_intel);
1738                                                 break;
1739 
1740                                         case TAG_FMT_ULONG:
1741                                                 info_value->u = php_ifd_get32u(vptr, motorola_intel);
1742                                                 break;
1743 
1744                                         case TAG_FMT_URATIONAL:
1745                                                 info_value->ur.num = php_ifd_get32u(vptr, motorola_intel);
1746                                                 info_value->ur.den = php_ifd_get32u(4+(char *)vptr, motorola_intel);
1747                                                 break;
1748 
1749                                         case TAG_FMT_SSHORT:
1750                                                 info_value->i = php_ifd_get16s(vptr, motorola_intel);
1751                                                 break;
1752 
1753                                         case TAG_FMT_SLONG:
1754                                                 info_value->i = php_ifd_get32s(vptr, motorola_intel);
1755                                                 break;
1756 
1757                                         case TAG_FMT_SRATIONAL:
1758                                                 info_value->sr.num = php_ifd_get32u(vptr, motorola_intel);
1759                                                 info_value->sr.den = php_ifd_get32u(4+(char *)vptr, motorola_intel);
1760                                                 break;
1761 
1762                                         case TAG_FMT_SINGLE:
1763 #ifdef EXIF_DEBUG
1764                                                 php_error_docref(NULL, E_WARNING, "Found value of type single");
1765 #endif
1766                                                 info_value->f = *(float *)value;
1767 
1768                                         case TAG_FMT_DOUBLE:
1769 #ifdef EXIF_DEBUG
1770                                                 php_error_docref(NULL, E_WARNING, "Found value of type double");
1771 #endif
1772                                                 info_value->d = *(double *)value;
1773                                                 break;
1774                                 }
1775                         }
1776         }
1777         image_info->sections_found |= 1<<section_index;
1778         image_info->info_list[section_index].count++;
1779 }
1780 /* }}} */
1781 
1782 /* {{{ exif_iif_add_tag
1783  Add a tag from IFD to image_info
1784 */
1785 static void exif_iif_add_tag(image_info_type *image_info, int section_index, char *name, int tag, int format, size_t length, void* value)
1786 {
1787         exif_iif_add_value(image_info, section_index, name, tag, format, (int)length, value, image_info->motorola_intel);
1788 }
1789 /* }}} */
1790 
1791 /* {{{ exif_iif_add_int
1792  Add an int value to image_info
1793 */
1794 static void exif_iif_add_int(image_info_type *image_info, int section_index, char *name, int value)
1795 {
1796         image_info_data  *info_data;
1797         image_info_data  *list;
1798 
1799         list = safe_erealloc(image_info->info_list[section_index].list, (image_info->info_list[section_index].count+1), sizeof(image_info_data), 0);
1800         image_info->info_list[section_index].list = list;
1801 
1802         info_data  = &image_info->info_list[section_index].list[image_info->info_list[section_index].count];
1803         info_data->tag    = TAG_NONE;
1804         info_data->format = TAG_FMT_SLONG;
1805         info_data->length = 1;
1806         info_data->name   = estrdup(name);
1807         info_data->value.i = value;
1808         image_info->sections_found |= 1<<section_index;
1809         image_info->info_list[section_index].count++;
1810 }
1811 /* }}} */
1812 
1813 /* {{{ exif_iif_add_str
1814  Add a string value to image_info MUST BE NUL TERMINATED
1815 */
1816 static void exif_iif_add_str(image_info_type *image_info, int section_index, char *name, char *value)
1817 {
1818         image_info_data  *info_data;
1819         image_info_data  *list;
1820 
1821         if (value) {
1822                 list = safe_erealloc(image_info->info_list[section_index].list, (image_info->info_list[section_index].count+1), sizeof(image_info_data), 0);
1823                 image_info->info_list[section_index].list = list;
1824                 info_data  = &image_info->info_list[section_index].list[image_info->info_list[section_index].count];
1825                 info_data->tag    = TAG_NONE;
1826                 info_data->format = TAG_FMT_STRING;
1827                 info_data->length = 1;
1828                 info_data->name   = estrdup(name);
1829                 info_data->value.s = estrdup(value);
1830                 image_info->sections_found |= 1<<section_index;
1831                 image_info->info_list[section_index].count++;
1832         }
1833 }
1834 /* }}} */
1835 
1836 /* {{{ exif_iif_add_fmt
1837  Add a format string value to image_info MUST BE NUL TERMINATED
1838 */
1839 static void exif_iif_add_fmt(image_info_type *image_info, int section_index, char *name, char *value, ...)
1840 {
1841         char             *tmp;
1842         va_list                  arglist;
1843 
1844         va_start(arglist, value);
1845         if (value) {
1846                 vspprintf(&tmp, 0, value, arglist);
1847                 exif_iif_add_str(image_info, section_index, name, tmp);
1848                 efree(tmp);
1849         }
1850         va_end(arglist);
1851 }
1852 /* }}} */
1853 
1854 /* {{{ exif_iif_add_str
1855  Add a string value to image_info MUST BE NUL TERMINATED
1856 */
1857 static void exif_iif_add_buffer(image_info_type *image_info, int section_index, char *name, int length, char *value)
1858 {
1859         image_info_data  *info_data;
1860         image_info_data  *list;
1861 
1862         if (value) {
1863                 list = safe_erealloc(image_info->info_list[section_index].list, (image_info->info_list[section_index].count+1), sizeof(image_info_data), 0);
1864                 image_info->info_list[section_index].list = list;
1865                 info_data  = &image_info->info_list[section_index].list[image_info->info_list[section_index].count];
1866                 info_data->tag    = TAG_NONE;
1867                 info_data->format = TAG_FMT_UNDEFINED;
1868                 info_data->length = length;
1869                 info_data->name   = estrdup(name);
1870                 info_data->value.s = safe_emalloc(length, 1, 1);
1871                 memcpy(info_data->value.s, value, length);
1872                 info_data->value.s[length] = 0;
1873                 image_info->sections_found |= 1<<section_index;
1874                 image_info->info_list[section_index].count++;
1875         }
1876 }
1877 /* }}} */
1878 
1879 /* {{{ exif_iif_free
1880  Free memory allocated for image_info
1881 */
1882 static void exif_iif_free(image_info_type *image_info, int section_index) {
1883         int  i;
1884         void *f; /* faster */
1885 
1886         if (image_info->info_list[section_index].count) {
1887                 for (i=0; i < image_info->info_list[section_index].count; i++) {
1888                         if ((f=image_info->info_list[section_index].list[i].name) != NULL) {
1889                                 efree(f);
1890                         }
1891                         switch(image_info->info_list[section_index].list[i].format) {
1892                                 case TAG_FMT_SBYTE:
1893                                 case TAG_FMT_BYTE:
1894                                         /* in contrast to strings bytes do not need to allocate buffer for NULL if length==0 */
1895                                         if (image_info->info_list[section_index].list[i].length<1)
1896                                                 break;
1897                                 default:
1898                                 case TAG_FMT_UNDEFINED:
1899                                 case TAG_FMT_STRING:
1900                                         if ((f=image_info->info_list[section_index].list[i].value.s) != NULL) {
1901                                                 efree(f);
1902                                         }
1903                                         break;
1904 
1905                                 case TAG_FMT_USHORT:
1906                                 case TAG_FMT_ULONG:
1907                                 case TAG_FMT_URATIONAL:
1908                                 case TAG_FMT_SSHORT:
1909                                 case TAG_FMT_SLONG:
1910                                 case TAG_FMT_SRATIONAL:
1911                                 case TAG_FMT_SINGLE:
1912                                 case TAG_FMT_DOUBLE:
1913                                         /* nothing to do here */
1914                                         if (image_info->info_list[section_index].list[i].length > 1) {
1915                                                 if ((f=image_info->info_list[section_index].list[i].value.list) != NULL) {
1916                                                         efree(f);
1917                                                 }
1918                                         }
1919                                         break;
1920                         }
1921                 }
1922         }
1923         EFREE_IF(image_info->info_list[section_index].list);
1924 }
1925 /* }}} */
1926 
1927 /* {{{ add_assoc_image_info
1928  * Add image_info to associative array value. */
1929 static void add_assoc_image_info(zval *value, int sub_array, image_info_type *image_info, int section_index)
1930 {
1931         char    buffer[64], *val, *name, uname[64];
1932         int     i, ap, l, b, idx=0, unknown=0;
1933 #ifdef EXIF_DEBUG
1934         int     info_tag;
1935 #endif
1936         image_info_value *info_value;
1937         image_info_data  *info_data;
1938         zval                     tmpi, array;
1939 
1940 #ifdef EXIF_DEBUG
1941 /*              php_error_docref(NULL, E_NOTICE, "Adding %d infos from section %s", image_info->info_list[section_index].count, exif_get_sectionname(section_index));*/
1942 #endif
1943         if (image_info->info_list[section_index].count) {
1944                 if (sub_array) {
1945                         array_init(&tmpi);
1946                 } else {
1947                         ZVAL_COPY_VALUE(&tmpi, value);
1948                 }
1949 
1950                 for(i=0; i<image_info->info_list[section_index].count; i++) {
1951                         info_data  = &image_info->info_list[section_index].list[i];
1952 #ifdef EXIF_DEBUG
1953                         info_tag   = info_data->tag; /* conversion */
1954 #endif
1955                         info_value = &info_data->value;
1956                         if (!(name = info_data->name)) {
1957                                 snprintf(uname, sizeof(uname), "%d", unknown++);
1958                                 name = uname;
1959                         }
1960 #ifdef EXIF_DEBUG
1961 /*              php_error_docref(NULL, E_NOTICE, "Adding infos: tag(0x%04X,%12s,L=0x%04X): %s", info_tag, exif_get_tagname(info_tag, buffer, -12, exif_get_tag_table(section_index)), info_data->length, info_data->format==TAG_FMT_STRING?(info_value&&info_value->s?info_value->s:"<no data>"):exif_get_tagformat(info_data->format));*/
1962 #endif
1963                         if (info_data->length==0) {
1964                                 add_assoc_null(&tmpi, name);
1965                         } else {
1966                                 switch (info_data->format) {
1967                                         default:
1968                                                 /* Standard says more types possible but skip them...
1969                                                  * but allow users to handle data if they know how to
1970                                                  * So not return but use type UNDEFINED
1971                                                  * return;
1972                                                  */
1973                                         case TAG_FMT_BYTE:
1974                                         case TAG_FMT_SBYTE:
1975                                         case TAG_FMT_UNDEFINED:
1976                                                 if (!info_value->s) {
1977                                                         add_assoc_stringl(&tmpi, name, "", 0);
1978                                                 } else {
1979                                                         add_assoc_stringl(&tmpi, name, info_value->s, info_data->length);
1980                                                 }
1981                                                 break;
1982 
1983                                         case TAG_FMT_STRING:
1984                                                 if (!(val = info_value->s)) {
1985                                                         val = "";
1986                                                 }
1987                                                 if (section_index==SECTION_COMMENT) {
1988                                                         add_index_string(&tmpi, idx++, val);
1989                                                 } else {
1990                                                         add_assoc_string(&tmpi, name, val);
1991                                                 }
1992                                                 break;
1993 
1994                                         case TAG_FMT_URATIONAL:
1995                                         case TAG_FMT_SRATIONAL:
1996                                         /*case TAG_FMT_BYTE:
1997                                         case TAG_FMT_SBYTE:*/
1998                                         case TAG_FMT_USHORT:
1999                                         case TAG_FMT_SSHORT:
2000                                         case TAG_FMT_SINGLE:
2001                                         case TAG_FMT_DOUBLE:
2002                                         case TAG_FMT_ULONG:
2003                                         case TAG_FMT_SLONG:
2004                                                 /* now the rest, first see if it becomes an array */
2005                                                 if ((l = info_data->length) > 1) {
2006                                                         array_init(&array);
2007                                                 }
2008                                                 for(ap=0; ap<l; ap++) {
2009                                                         if (l>1) {
2010                                                                 info_value = &info_data->value.list[ap];
2011                                                         }
2012                                                         switch (info_data->format) {
2013                                                                 case TAG_FMT_BYTE:
2014                                                                         if (l>1) {
2015                                                                                 info_value = &info_data->value;
2016                                                                                 for (b=0;b<l;b++) {
2017                                                                                         add_index_long(&array, b, (int)(info_value->s[b]));
2018                                                                                 }
2019                                                                                 break;
2020                                                                         }
2021                                                                 case TAG_FMT_USHORT:
2022                                                                 case TAG_FMT_ULONG:
2023                                                                         if (l==1) {
2024                                                                                 add_assoc_long(&tmpi, name, (int)info_value->u);
2025                                                                         } else {
2026                                                                                 add_index_long(&array, ap, (int)info_value->u);
2027                                                                         }
2028                                                                         break;
2029 
2030                                                                 case TAG_FMT_URATIONAL:
2031                                                                         snprintf(buffer, sizeof(buffer), "%i/%i", info_value->ur.num, info_value->ur.den);
2032                                                                         if (l==1) {
2033                                                                                 add_assoc_string(&tmpi, name, buffer);
2034                                                                         } else {
2035                                                                                 add_index_string(&array, ap, buffer);
2036                                                                         }
2037                                                                         break;
2038 
2039                                                                 case TAG_FMT_SBYTE:
2040                                                                         if (l>1) {
2041                                                                                 info_value = &info_data->value;
2042                                                                                 for (b=0;b<l;b++) {
2043                                                                                         add_index_long(&array, ap, (int)info_value->s[b]);
2044                                                                                 }
2045                                                                                 break;
2046                                                                         }
2047                                                                 case TAG_FMT_SSHORT:
2048                                                                 case TAG_FMT_SLONG:
2049                                                                         if (l==1) {
2050                                                                                 add_assoc_long(&tmpi, name, info_value->i);
2051                                                                         } else {
2052                                                                                 add_index_long(&array, ap, info_value->i);
2053                                                                         }
2054                                                                         break;
2055 
2056                                                                 case TAG_FMT_SRATIONAL:
2057                                                                         snprintf(buffer, sizeof(buffer), "%i/%i", info_value->sr.num, info_value->sr.den);
2058                                                                         if (l==1) {
2059                                                                                 add_assoc_string(&tmpi, name, buffer);
2060                                                                         } else {
2061                                                                                 add_index_string(&array, ap, buffer);
2062                                                                         }
2063                                                                         break;
2064 
2065                                                                 case TAG_FMT_SINGLE:
2066                                                                         if (l==1) {
2067                                                                                 add_assoc_double(&tmpi, name, info_value->f);
2068                                                                         } else {
2069                                                                                 add_index_double(&array, ap, info_value->f);
2070                                                                         }
2071                                                                         break;
2072 
2073                                                                 case TAG_FMT_DOUBLE:
2074                                                                         if (l==1) {
2075                                                                                 add_assoc_double(&tmpi, name, info_value->d);
2076                                                                         } else {
2077                                                                                 add_index_double(&array, ap, info_value->d);
2078                                                                         }
2079                                                                         break;
2080                                                         }
2081                                                         info_value = &info_data->value.list[ap];
2082                                                 }
2083                                                 if (l>1) {
2084                                                         add_assoc_zval(&tmpi, name, &array);
2085                                                 }
2086                                                 break;
2087                                 }
2088                         }
2089                 }
2090                 if (sub_array) {
2091                         add_assoc_zval(value, exif_get_sectionname(section_index), &tmpi);
2092                 }
2093         }
2094 }
2095 /* }}} */
2096 
2097 /* {{{ Markers
2098    JPEG markers consist of one or more 0xFF bytes, followed by a marker
2099    code byte (which is not an FF).  Here are the marker codes of interest
2100    in this program.  (See jdmarker.c for a more complete list.)
2101 */
2102 
2103 #define M_TEM   0x01    /* temp for arithmetic coding              */
2104 #define M_RES   0x02    /* reserved                                */
2105 #define M_SOF0  0xC0    /* Start Of Frame N                        */
2106 #define M_SOF1  0xC1    /* N indicates which compression process   */
2107 #define M_SOF2  0xC2    /* Only SOF0-SOF2 are now in common use    */
2108 #define M_SOF3  0xC3
2109 #define M_DHT   0xC4
2110 #define M_SOF5  0xC5    /* NB: codes C4 and CC are NOT SOF markers */
2111 #define M_SOF6  0xC6
2112 #define M_SOF7  0xC7
2113 #define M_JPEG  0x08    /* reserved for extensions                 */
2114 #define M_SOF9  0xC9
2115 #define M_SOF10 0xCA
2116 #define M_SOF11 0xCB
2117 #define M_DAC   0xCC    /* arithmetic table                         */
2118 #define M_SOF13 0xCD
2119 #define M_SOF14 0xCE
2120 #define M_SOF15 0xCF
2121 #define M_RST0  0xD0    /* restart segment                          */
2122 #define M_RST1  0xD1
2123 #define M_RST2  0xD2
2124 #define M_RST3  0xD3
2125 #define M_RST4  0xD4
2126 #define M_RST5  0xD5
2127 #define M_RST6  0xD6
2128 #define M_RST7  0xD7
2129 #define M_SOI   0xD8    /* Start Of Image (beginning of datastream) */
2130 #define M_EOI   0xD9    /* End Of Image (end of datastream)         */
2131 #define M_SOS   0xDA    /* Start Of Scan (begins compressed data)   */
2132 #define M_DQT   0xDB
2133 #define M_DNL   0xDC
2134 #define M_DRI   0xDD
2135 #define M_DHP   0xDE
2136 #define M_EXP   0xDF
2137 #define M_APP0  0xE0    /* JPEG: 'JFIFF' AND (additional 'JFXX')    */
2138 #define M_EXIF  0xE1    /* Exif Attribute Information               */
2139 #define M_APP2  0xE2    /* Flash Pix Extension Data?                */
2140 #define M_APP3  0xE3
2141 #define M_APP4  0xE4
2142 #define M_APP5  0xE5
2143 #define M_APP6  0xE6
2144 #define M_APP7  0xE7
2145 #define M_APP8  0xE8
2146 #define M_APP9  0xE9
2147 #define M_APP10 0xEA
2148 #define M_APP11 0xEB
2149 #define M_APP12 0xEC
2150 #define M_APP13 0xED    /* IPTC International Press Telecommunications Council */
2151 #define M_APP14 0xEE    /* Software, Copyright?                     */
2152 #define M_APP15 0xEF
2153 #define M_JPG0  0xF0
2154 #define M_JPG1  0xF1
2155 #define M_JPG2  0xF2
2156 #define M_JPG3  0xF3
2157 #define M_JPG4  0xF4
2158 #define M_JPG5  0xF5
2159 #define M_JPG6  0xF6
2160 #define M_JPG7  0xF7
2161 #define M_JPG8  0xF8
2162 #define M_JPG9  0xF9
2163 #define M_JPG10 0xFA
2164 #define M_JPG11 0xFB
2165 #define M_JPG12 0xFC
2166 #define M_JPG13 0xFD
2167 #define M_COM   0xFE    /* COMment                                  */
2168 
2169 #define M_PSEUDO 0x123  /* Extra value.                             */
2170 
2171 /* }}} */
2172 
2173 /* {{{ jpeg2000 markers
2174  */
2175 /* Markers x30 - x3F do not have a segment */
2176 /* Markers x00, x01, xFE, xC0 - xDF ISO/IEC 10918-1 -> M_<xx> */
2177 /* Markers xF0 - xF7 ISO/IEC 10918-3 */
2178 /* Markers xF7 - xF8 ISO/IEC 14495-1 */
2179 /* XY=Main/Tile-header:(R:required, N:not_allowed, O:optional, L:last_marker) */
2180 #define JC_SOC   0x4F   /* NN, Start of codestream                          */
2181 #define JC_SIZ   0x51   /* RN, Image and tile size                          */
2182 #define JC_COD   0x52   /* RO, Codeing style defaulte                       */
2183 #define JC_COC   0x53   /* OO, Coding style component                       */
2184 #define JC_TLM   0x55   /* ON, Tile part length main header                 */
2185 #define JC_PLM   0x57   /* ON, Packet length main header                    */
2186 #define JC_PLT   0x58   /* NO, Packet length tile part header               */
2187 #define JC_QCD   0x5C   /* RO, Quantization default                         */
2188 #define JC_QCC   0x5D   /* OO, Quantization component                       */
2189 #define JC_RGN   0x5E   /* OO, Region of interest                           */
2190 #define JC_POD   0x5F   /* OO, Progression order default                    */
2191 #define JC_PPM   0x60   /* ON, Packed packet headers main header            */
2192 #define JC_PPT   0x61   /* NO, Packet packet headers tile part header       */
2193 #define JC_CME   0x64   /* OO, Comment: "LL E <text>" E=0:binary, E=1:ascii */
2194 #define JC_SOT   0x90   /* NR, Start of tile                                */
2195 #define JC_SOP   0x91   /* NO, Start of packeter default                    */
2196 #define JC_EPH   0x92   /* NO, End of packet header                         */
2197 #define JC_SOD   0x93   /* NL, Start of data                                */
2198 #define JC_EOC   0xD9   /* NN, End of codestream                            */
2199 /* }}} */
2200 
2201 /* {{{ exif_process_COM
2202    Process a COM marker.
2203    We want to print out the marker contents as legible text;
2204    we must guard against random junk and varying newline representations.
2205 */
2206 static void exif_process_COM (image_info_type *image_info, char *value, size_t length)
2207 {
2208         exif_iif_add_tag(image_info, SECTION_COMMENT, "Comment", TAG_COMPUTED_VALUE, TAG_FMT_STRING, length-2, value+2);
2209 }
2210 /* }}} */
2211 
2212 /* {{{ exif_process_CME
2213    Process a CME marker.
2214    We want to print out the marker contents as legible text;
2215    we must guard against random junk and varying newline representations.
2216 */
2217 #ifdef EXIF_JPEG2000
2218 static void exif_process_CME (image_info_type *image_info, char *value, size_t length)
2219 {
2220         if (length>3) {
2221                 switch(value[2]) {
2222                         case 0:
2223                                 exif_iif_add_tag(image_info, SECTION_COMMENT, "Comment", TAG_COMPUTED_VALUE, TAG_FMT_UNDEFINED, length, value);
2224                                 break;
2225                         case 1:
2226                                 exif_iif_add_tag(image_info, SECTION_COMMENT, "Comment", TAG_COMPUTED_VALUE, TAG_FMT_STRING, length, value);
2227                                 break;
2228                         default:
2229                                 php_error_docref(NULL, E_NOTICE, "Undefined JPEG2000 comment encoding");
2230                                 break;
2231                 }
2232         } else {
2233                 exif_iif_add_tag(image_info, SECTION_COMMENT, "Comment", TAG_COMPUTED_VALUE, TAG_FMT_UNDEFINED, 0, NULL);
2234                 php_error_docref(NULL, E_NOTICE, "JPEG2000 comment section too small");
2235         }
2236 }
2237 #endif
2238 /* }}} */
2239 
2240 /* {{{ exif_process_SOFn
2241  * Process a SOFn marker.  This is useful for the image dimensions */
2242 static void exif_process_SOFn (uchar *Data, int marker, jpeg_sof_info *result)
2243 {
2244 /* 0xFF SOSn SectLen(2) Bits(1) Height(2) Width(2) Channels(1)  3*Channels (1)  */
2245         result->bits_per_sample = Data[2];
2246         result->height          = php_jpg_get16(Data+3);
2247         result->width           = php_jpg_get16(Data+5);
2248         result->num_components  = Data[7];
2249 
2250 /*      switch (marker) {
2251                 case M_SOF0:  process = "Baseline";  break;
2252                 case M_SOF1:  process = "Extended sequential";  break;
2253                 case M_SOF2:  process = "Progressive";  break;
2254                 case M_SOF3:  process = "Lossless";  break;
2255                 case M_SOF5:  process = "Differential sequential";  break;
2256                 case M_SOF6:  process = "Differential progressive";  break;
2257                 case M_SOF7:  process = "Differential lossless";  break;
2258                 case M_SOF9:  process = "Extended sequential, arithmetic coding";  break;
2259                 case M_SOF10: process = "Progressive, arithmetic coding";  break;
2260                 case M_SOF11: process = "Lossless, arithmetic coding";  break;
2261                 case M_SOF13: process = "Differential sequential, arithmetic coding";  break;
2262                 case M_SOF14: process = "Differential progressive, arithmetic coding"; break;
2263                 case M_SOF15: process = "Differential lossless, arithmetic coding";  break;
2264                 default:      process = "Unknown";  break;
2265         }*/
2266 }
2267 /* }}} */
2268 
2269 /* forward declarations */
2270 static int exif_process_IFD_in_JPEG(image_info_type *ImageInfo, char *dir_start, char *offset_base, size_t IFDlength, size_t displacement, int section_index);
2271 static int exif_process_IFD_TAG(    image_info_type *ImageInfo, char *dir_entry, char *offset_base, size_t IFDlength, size_t displacement, int section_index, int ReadNextIFD, tag_table_type tag_table);
2272 
2273 /* {{{ exif_get_markername
2274         Get name of marker */
2275 #ifdef EXIF_DEBUG
2276 static char * exif_get_markername(int marker)
2277 {
2278         switch(marker) {
2279                 case 0xC0: return "SOF0";
2280                 case 0xC1: return "SOF1";
2281                 case 0xC2: return "SOF2";
2282                 case 0xC3: return "SOF3";
2283                 case 0xC4: return "DHT";
2284                 case 0xC5: return "SOF5";
2285                 case 0xC6: return "SOF6";
2286                 case 0xC7: return "SOF7";
2287                 case 0xC9: return "SOF9";
2288                 case 0xCA: return "SOF10";
2289                 case 0xCB: return "SOF11";
2290                 case 0xCD: return "SOF13";
2291                 case 0xCE: return "SOF14";
2292                 case 0xCF: return "SOF15";
2293                 case 0xD8: return "SOI";
2294                 case 0xD9: return "EOI";
2295                 case 0xDA: return "SOS";
2296                 case 0xDB: return "DQT";
2297                 case 0xDC: return "DNL";
2298                 case 0xDD: return "DRI";
2299                 case 0xDE: return "DHP";
2300                 case 0xDF: return "EXP";
2301                 case 0xE0: return "APP0";
2302                 case 0xE1: return "EXIF";
2303                 case 0xE2: return "FPIX";
2304                 case 0xE3: return "APP3";
2305                 case 0xE4: return "APP4";
2306                 case 0xE5: return "APP5";
2307                 case 0xE6: return "APP6";
2308                 case 0xE7: return "APP7";
2309                 case 0xE8: return "APP8";
2310                 case 0xE9: return "APP9";
2311                 case 0xEA: return "APP10";
2312                 case 0xEB: return "APP11";
2313                 case 0xEC: return "APP12";
2314                 case 0xED: return "APP13";
2315                 case 0xEE: return "APP14";
2316                 case 0xEF: return "APP15";
2317                 case 0xF0: return "JPG0";
2318                 case 0xFD: return "JPG13";
2319                 case 0xFE: return "COM";
2320                 case 0x01: return "TEM";
2321         }
2322         return "Unknown";
2323 }
2324 #endif
2325 /* }}} */
2326 
2327 /* {{{ proto string exif_tagname(int index)
2328         Get headername for index or false if not defined */
2329 PHP_FUNCTION(exif_tagname)
2330 {
2331         zend_long tag;
2332         char *szTemp;
2333 
2334         if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &tag) == FAILURE) {
2335                 return;
2336         }
2337 
2338         szTemp = exif_get_tagname(tag, NULL, 0, tag_table_IFD);
2339 
2340         if (tag < 0 || !szTemp || !szTemp[0]) {
2341                 RETURN_FALSE;
2342         }
2343 
2344         RETURN_STRING(szTemp)
2345 }
2346 /* }}} */
2347 
2348 /* {{{ exif_ifd_make_value
2349  * Create a value for an ifd from an info_data pointer */
2350 static void* exif_ifd_make_value(image_info_data *info_data, int motorola_intel) {
2351         size_t  byte_count;
2352         char    *value_ptr, *data_ptr;
2353         size_t  i;
2354 
2355         image_info_value  *info_value;
2356 
2357         byte_count = php_tiff_bytes_per_format[info_data->format] * info_data->length;
2358         value_ptr = safe_emalloc(max(byte_count, 4), 1, 0);
2359         memset(value_ptr, 0, 4);
2360         if (!info_data->length) {
2361                 return value_ptr;
2362         }
2363         if (info_data->format == TAG_FMT_UNDEFINED || info_data->format == TAG_FMT_STRING
2364           || (byte_count>1 && (info_data->format == TAG_FMT_BYTE || info_data->format == TAG_FMT_SBYTE))
2365         ) {
2366                 memmove(value_ptr, info_data->value.s, byte_count);
2367                 return value_ptr;
2368         } else if (info_data->format == TAG_FMT_BYTE) {
2369                 *value_ptr = info_data->value.u;
2370                 return value_ptr;
2371         } else if (info_data->format == TAG_FMT_SBYTE) {
2372                 *value_ptr = info_data->value.i;
2373                 return value_ptr;
2374         } else {
2375                 data_ptr = value_ptr;
2376                 for(i=0; i<info_data->length; i++) {
2377                         if (info_data->length==1) {
2378                                 info_value = &info_data->value;
2379                         } else {
2380                                 info_value = &info_data->value.list[i];
2381                         }
2382                         switch(info_data->format) {
2383                                 case TAG_FMT_USHORT:
2384                                         php_ifd_set16u(data_ptr, info_value->u, motorola_intel);
2385                                         data_ptr += 2;
2386                                         break;
2387                                 case TAG_FMT_ULONG:
2388                                         php_ifd_set32u(data_ptr, info_value->u, motorola_intel);
2389                                         data_ptr += 4;
2390                                         break;
2391                                 case TAG_FMT_SSHORT:
2392                                         php_ifd_set16u(data_ptr, info_value->i, motorola_intel);
2393                                         data_ptr += 2;
2394                                         break;
2395                                 case TAG_FMT_SLONG:
2396                                         php_ifd_set32u(data_ptr, info_value->i, motorola_intel);
2397                                         data_ptr += 4;
2398                                         break;
2399                                 case TAG_FMT_URATIONAL:
2400                                         php_ifd_set32u(data_ptr,   info_value->sr.num, motorola_intel);
2401                                         php_ifd_set32u(data_ptr+4, info_value->sr.den, motorola_intel);
2402                                         data_ptr += 8;
2403                                         break;
2404                                 case TAG_FMT_SRATIONAL:
2405                                         php_ifd_set32u(data_ptr,   info_value->ur.num, motorola_intel);
2406                                         php_ifd_set32u(data_ptr+4, info_value->ur.den, motorola_intel);
2407                                         data_ptr += 8;
2408                                         break;
2409                                 case TAG_FMT_SINGLE:
2410                                         memmove(data_ptr, &info_value->f, 4);
2411                                         data_ptr += 4;
2412                                         break;
2413                                 case TAG_FMT_DOUBLE:
2414                                         memmove(data_ptr, &info_value->d, 8);
2415                                         data_ptr += 8;
2416                                         break;
2417                         }
2418                 }
2419         }
2420         return value_ptr;
2421 }
2422 /* }}} */
2423 
2424 /* {{{ exif_thumbnail_build
2425  * Check and build thumbnail */
2426 static void exif_thumbnail_build(image_info_type *ImageInfo) {
2427         size_t            new_size, new_move, new_value;
2428         char              *new_data;
2429         void              *value_ptr;
2430         int               i, byte_count;
2431         image_info_list   *info_list;
2432         image_info_data   *info_data;
2433 #ifdef EXIF_DEBUG
2434         char              tagname[64];
2435 #endif
2436 
2437         if (!ImageInfo->read_thumbnail || !ImageInfo->Thumbnail.offset || !ImageInfo->Thumbnail.size) {
2438                 return; /* ignore this call */
2439         }
2440 #ifdef EXIF_DEBUG
2441         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail: filetype = %d", ImageInfo->Thumbnail.filetype);
2442 #endif
2443         switch(ImageInfo->Thumbnail.filetype) {
2444                 default:
2445                 case IMAGE_FILETYPE_JPEG:
2446                         /* done */
2447                         break;
2448                 case IMAGE_FILETYPE_TIFF_II:
2449                 case IMAGE_FILETYPE_TIFF_MM:
2450                         info_list = &ImageInfo->info_list[SECTION_THUMBNAIL];
2451                         new_size  = 8 + 2 + info_list->count * 12 + 4;
2452 #ifdef EXIF_DEBUG
2453                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail: size of signature + directory(%d): 0x%02X", info_list->count, new_size);
2454 #endif
2455                         new_value= new_size; /* offset for ifd values outside ifd directory */
2456                         for (i=0; i<info_list->count; i++) {
2457                                 info_data  = &info_list->list[i];
2458                                 byte_count = php_tiff_bytes_per_format[info_data->format] * info_data->length;
2459                                 if (byte_count > 4) {
2460                                         new_size += byte_count;
2461                                 }
2462                         }
2463                         new_move = new_size;
2464                         new_data = safe_erealloc(ImageInfo->Thumbnail.data, 1, ImageInfo->Thumbnail.size, new_size);
2465                         ImageInfo->Thumbnail.data = new_data;
2466                         memmove(ImageInfo->Thumbnail.data + new_move, ImageInfo->Thumbnail.data, ImageInfo->Thumbnail.size);
2467                         ImageInfo->Thumbnail.size += new_size;
2468                         /* fill in data */
2469                         if (ImageInfo->motorola_intel) {
2470                                 memmove(new_data, "MM\x00\x2a\x00\x00\x00\x08", 8);
2471                         } else {
2472                                 memmove(new_data, "II\x2a\x00\x08\x00\x00\x00", 8);
2473                         }
2474                         new_data += 8;
2475                         php_ifd_set16u(new_data, info_list->count, ImageInfo->motorola_intel);
2476                         new_data += 2;
2477                         for (i=0; i<info_list->count; i++) {
2478                                 info_data  = &info_list->list[i];
2479                                 byte_count = php_tiff_bytes_per_format[info_data->format] * info_data->length;
2480 #ifdef EXIF_DEBUG
2481                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail: process tag(x%04X=%s): %s%s (%d bytes)", info_data->tag, exif_get_tagname(info_data->tag, tagname, -12, tag_table_IFD), (info_data->length>1)&&info_data->format!=TAG_FMT_UNDEFINED&&info_data->format!=TAG_FMT_STRING?"ARRAY OF ":"", exif_get_tagformat(info_data->format), byte_count);
2482 #endif
2483                                 if (info_data->tag==TAG_STRIP_OFFSETS || info_data->tag==TAG_JPEG_INTERCHANGE_FORMAT) {
2484                                         php_ifd_set16u(new_data + 0, info_data->tag,    ImageInfo->motorola_intel);
2485                                         php_ifd_set16u(new_data + 2, TAG_FMT_ULONG,     ImageInfo->motorola_intel);
2486                                         php_ifd_set32u(new_data + 4, 1,                 ImageInfo->motorola_intel);
2487                                         php_ifd_set32u(new_data + 8, new_move,          ImageInfo->motorola_intel);
2488                                 } else {
2489                                         php_ifd_set16u(new_data + 0, info_data->tag,    ImageInfo->motorola_intel);
2490                                         php_ifd_set16u(new_data + 2, info_data->format, ImageInfo->motorola_intel);
2491                                         php_ifd_set32u(new_data + 4, info_data->length, ImageInfo->motorola_intel);
2492                                         value_ptr  = exif_ifd_make_value(info_data, ImageInfo->motorola_intel);
2493                                         if (byte_count <= 4) {
2494                                                 memmove(new_data+8, value_ptr, 4);
2495                                         } else {
2496                                                 php_ifd_set32u(new_data+8, new_value, ImageInfo->motorola_intel);
2497 #ifdef EXIF_DEBUG
2498                                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail: writing with value offset: 0x%04X + 0x%02X", new_value, byte_count);
2499 #endif
2500                                                 memmove(ImageInfo->Thumbnail.data+new_value, value_ptr, byte_count);
2501                                                 new_value += byte_count;
2502                                         }
2503                                         efree(value_ptr);
2504                                 }
2505                                 new_data += 12;
2506                         }
2507                         memset(new_data, 0, 4); /* next ifd pointer */
2508 #ifdef EXIF_DEBUG
2509                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail: created");
2510 #endif
2511                         break;
2512         }
2513 }
2514 /* }}} */
2515 
2516 /* {{{ exif_thumbnail_extract
2517  * Grab the thumbnail, corrected */
2518 static void exif_thumbnail_extract(image_info_type *ImageInfo, char *offset, size_t length) {
2519         if (ImageInfo->Thumbnail.data) {
2520                 exif_error_docref("exif_read_data#error_mult_thumb" EXIFERR_CC, ImageInfo, E_WARNING, "Multiple possible thumbnails");
2521                 return; /* Should not happen */
2522         }
2523         if (!ImageInfo->read_thumbnail) {
2524                 return; /* ignore this call */
2525         }
2526         /* according to exif2.1, the thumbnail is not supposed to be greater than 64K */
2527         if (ImageInfo->Thumbnail.size >= 65536
2528          || ImageInfo->Thumbnail.size <= 0
2529          || ImageInfo->Thumbnail.offset <= 0
2530         ) {
2531                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Illegal thumbnail size/offset");
2532                 return;
2533         }
2534         /* Check to make sure we are not going to go past the ExifLength */
2535         if ((ImageInfo->Thumbnail.offset + ImageInfo->Thumbnail.size) > length) {
2536                 EXIF_ERRLOG_THUMBEOF(ImageInfo)
2537                 return;
2538         }
2539         ImageInfo->Thumbnail.data = estrndup(offset + ImageInfo->Thumbnail.offset, ImageInfo->Thumbnail.size);
2540         exif_thumbnail_build(ImageInfo);
2541 }
2542 /* }}} */
2543 
2544 /* {{{ exif_process_undefined
2545  * Copy a string/buffer in Exif header to a character string and return length of allocated buffer if any. */
2546 static int exif_process_undefined(char **result, char *value, size_t byte_count) {
2547         /* we cannot use strlcpy - here the problem is that we have to copy NUL
2548          * chars up to byte_count, we also have to add a single NUL character to
2549          * force end of string.
2550          * estrndup does not return length
2551          */
2552         if (byte_count) {
2553                 (*result) = estrndup(value, byte_count); /* NULL @ byte_count!!! */
2554                 return byte_count+1;
2555         }
2556         return 0;
2557 }
2558 /* }}} */
2559 
2560 /* {{{ exif_process_string_raw
2561  * Copy a string in Exif header to a character string returns length of allocated buffer if any. */
2562 static int exif_process_string_raw(char **result, char *value, size_t byte_count) {
2563         /* we cannot use strlcpy - here the problem is that we have to copy NUL
2564          * chars up to byte_count, we also have to add a single NUL character to
2565          * force end of string.
2566          */
2567         if (byte_count) {
2568                 (*result) = safe_emalloc(byte_count, 1, 1);
2569                 memcpy(*result, value, byte_count);
2570                 (*result)[byte_count] = '\0';
2571                 return byte_count+1;
2572         }
2573         return 0;
2574 }
2575 /* }}} */
2576 
2577 /* {{{ exif_process_string
2578  * Copy a string in Exif header to a character string and return length of allocated buffer if any.
2579  * In contrast to exif_process_string this function does always return a string buffer */
2580 static int exif_process_string(char **result, char *value, size_t byte_count) {
2581         /* we cannot use strlcpy - here the problem is that we cannot use strlen to
2582          * determin length of string and we cannot use strlcpy with len=byte_count+1
2583          * because then we might get into an EXCEPTION if we exceed an allocated
2584          * memory page...so we use php_strnlen in conjunction with memcpy and add the NUL
2585          * char.
2586          * estrdup would sometimes allocate more memory and does not return length
2587          */
2588         if ((byte_count=php_strnlen(value, byte_count)) > 0) {
2589                 return exif_process_undefined(result, value, byte_count);
2590         }
2591         (*result) = estrndup("", 1); /* force empty string */
2592         return byte_count+1;
2593 }
2594 /* }}} */
2595 
2596 /* {{{ exif_process_user_comment
2597  * Process UserComment in IFD. */
2598 static int exif_process_user_comment(image_info_type *ImageInfo, char **pszInfoPtr, char **pszEncoding, char *szValuePtr, int ByteCount)
2599 {
2600         int   a;
2601         char  *decode;
2602         size_t len;;
2603 
2604         *pszEncoding = NULL;
2605         /* Copy the comment */
2606         if (ByteCount>=8) {
2607                 if (!memcmp(szValuePtr, "UNICODE\0", 8)) {
2608                         *pszEncoding = estrdup((const char*)szValuePtr);
2609                         szValuePtr = szValuePtr+8;
2610                         ByteCount -= 8;
2611                         /* First try to detect BOM: ZERO WIDTH NOBREAK SPACE (FEFF 16)
2612                          * since we have no encoding support for the BOM yet we skip that.
2613                          */
2614                         if (!memcmp(szValuePtr, "\xFE\xFF", 2)) {
2615                                 decode = "UCS-2BE";
2616                                 szValuePtr = szValuePtr+2;
2617                                 ByteCount -= 2;
2618                         } else if (!memcmp(szValuePtr, "\xFF\xFE", 2)) {
2619                                 decode = "UCS-2LE";
2620                                 szValuePtr = szValuePtr+2;
2621                                 ByteCount -= 2;
2622                         } else if (ImageInfo->motorola_intel) {
2623                                 decode = ImageInfo->decode_unicode_be;
2624                         } else {
2625                                 decode = ImageInfo->decode_unicode_le;
2626                         }
2627                         /* XXX this will fail again if encoding_converter returns on error something different than SIZE_MAX   */
2628                         if (zend_multibyte_encoding_converter(
2629                                         (unsigned char**)pszInfoPtr,
2630                                         &len,
2631                                         (unsigned char*)szValuePtr,
2632                                         ByteCount,
2633                                         zend_multibyte_fetch_encoding(ImageInfo->encode_unicode),
2634                                         zend_multibyte_fetch_encoding(decode)
2635                                         ) == (size_t)-1) {
2636                                 len = exif_process_string_raw(pszInfoPtr, szValuePtr, ByteCount);
2637                         }
2638                         return len;
2639                 } else if (!memcmp(szValuePtr, "ASCII\0\0\0", 8)) {
2640                         *pszEncoding = estrdup((const char*)szValuePtr);
2641                         szValuePtr = szValuePtr+8;
2642                         ByteCount -= 8;
2643                 } else if (!memcmp(szValuePtr, "JIS\0\0\0\0\0", 8)) {
2644                         /* JIS should be tanslated to MB or we leave it to the user - leave it to the user */
2645                         *pszEncoding = estrdup((const char*)szValuePtr);
2646                         szValuePtr = szValuePtr+8;
2647                         ByteCount -= 8;
2648                         /* XXX this will fail again if encoding_converter returns on error something different than SIZE_MAX   */
2649                         if (zend_multibyte_encoding_converter(
2650                                         (unsigned char**)pszInfoPtr,
2651                                         &len,
2652                                         (unsigned char*)szValuePtr,
2653                                         ByteCount,
2654                                         zend_multibyte_fetch_encoding(ImageInfo->encode_jis),
2655                                         zend_multibyte_fetch_encoding(ImageInfo->motorola_intel ? ImageInfo->decode_jis_be : ImageInfo->decode_jis_le)
2656                                         ) == (size_t)-1) {
2657                                 len = exif_process_string_raw(pszInfoPtr, szValuePtr, ByteCount);
2658                         }
2659                         return len;
2660                 } else if (!memcmp(szValuePtr, "\0\0\0\0\0\0\0\0", 8)) {
2661                         /* 8 NULL means undefined and should be ASCII... */
2662                         *pszEncoding = estrdup("UNDEFINED");
2663                         szValuePtr = szValuePtr+8;
2664                         ByteCount -= 8;
2665                 }
2666         }
2667 
2668         /* Olympus has this padded with trailing spaces.  Remove these first. */
2669         if (ByteCount>0) {
2670                 for (a=ByteCount-1;a && szValuePtr[a]==' ';a--) {
2671                         (szValuePtr)[a] = '\0';
2672                 }
2673         }
2674 
2675         /* normal text without encoding */
2676         exif_process_string(pszInfoPtr, szValuePtr, ByteCount);
2677         return strlen(*pszInfoPtr);
2678 }
2679 /* }}} */
2680 
2681 /* {{{ exif_process_unicode
2682  * Process unicode field in IFD. */
2683 static int exif_process_unicode(image_info_type *ImageInfo, xp_field_type *xp_field, int tag, char *szValuePtr, int ByteCount)
2684 {
2685         xp_field->tag = tag;
2686         xp_field->value = NULL;
2687         /* XXX this will fail again if encoding_converter returns on error something different than SIZE_MAX   */
2688         if (zend_multibyte_encoding_converter(
2689                         (unsigned char**)&xp_field->value,
2690                         &xp_field->size,
2691                         (unsigned char*)szValuePtr,
2692                         ByteCount,
2693                         zend_multibyte_fetch_encoding(ImageInfo->encode_unicode),
2694                         zend_multibyte_fetch_encoding(ImageInfo->motorola_intel ? ImageInfo->decode_unicode_be : ImageInfo->decode_unicode_le)
2695                         ) == (size_t)-1) {
2696                 xp_field->size = exif_process_string_raw(&xp_field->value, szValuePtr, ByteCount);
2697         }
2698         return xp_field->size;
2699 }
2700 /* }}} */
2701 
2702 /* {{{ exif_process_IFD_in_MAKERNOTE
2703  * Process nested IFDs directories in Maker Note. */
2704 static int exif_process_IFD_in_MAKERNOTE(image_info_type *ImageInfo, char * value_ptr, int value_len, char *offset_base, size_t IFDlength, size_t displacement)
2705 {
2706         int de, i=0, section_index = SECTION_MAKERNOTE;
2707         int NumDirEntries, old_motorola_intel, offset_diff;
2708         const maker_note_type *maker_note;
2709         char *dir_start;
2710 
2711         for (i=0; i<=sizeof(maker_note_array)/sizeof(maker_note_type); i++) {
2712                 if (i==sizeof(maker_note_array)/sizeof(maker_note_type))
2713                         return FALSE;
2714                 maker_note = maker_note_array+i;
2715 
2716                 /*exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "check (%s,%s)", maker_note->make?maker_note->make:"", maker_note->model?maker_note->model:"");*/
2717                 if (maker_note->make && (!ImageInfo->make || strcmp(maker_note->make, ImageInfo->make)))
2718                         continue;
2719                 if (maker_note->model && (!ImageInfo->model || strcmp(maker_note->model, ImageInfo->model)))
2720                         continue;
2721                 if (maker_note->id_string && strncmp(maker_note->id_string, value_ptr, maker_note->id_string_len))
2722                         continue;
2723                 break;
2724         }
2725 
2726         dir_start = value_ptr + maker_note->offset;
2727 
2728 #ifdef EXIF_DEBUG
2729         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Process %s @x%04X + 0x%04X=%d: %s", exif_get_sectionname(section_index), (int)dir_start-(int)offset_base+maker_note->offset+displacement, value_len, value_len, exif_char_dump(value_ptr, value_len, (int)dir_start-(int)offset_base+maker_note->offset+displacement));
2730 #endif
2731 
2732         ImageInfo->sections_found |= FOUND_MAKERNOTE;
2733 
2734         old_motorola_intel = ImageInfo->motorola_intel;
2735         switch (maker_note->byte_order) {
2736                 case MN_ORDER_INTEL:
2737                         ImageInfo->motorola_intel = 0;
2738                         break;
2739                 case MN_ORDER_MOTOROLA:
2740                         ImageInfo->motorola_intel = 1;
2741                         break;
2742                 default:
2743                 case MN_ORDER_NORMAL:
2744                         break;
2745         }
2746 
2747         NumDirEntries = php_ifd_get16u(dir_start, ImageInfo->motorola_intel);
2748 
2749         switch (maker_note->offset_mode) {
2750                 case MN_OFFSET_MAKER:
2751                         offset_base = value_ptr;
2752                         break;
2753                 case MN_OFFSET_GUESS:
2754                         offset_diff = 2 + NumDirEntries*12 + 4 - php_ifd_get32u(dir_start+10, ImageInfo->motorola_intel);
2755 #ifdef EXIF_DEBUG
2756                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Using automatic offset correction: 0x%04X", ((int)dir_start-(int)offset_base+maker_note->offset+displacement) + offset_diff);
2757 #endif
2758                         offset_base = value_ptr + offset_diff;
2759                         break;
2760                 default:
2761                 case MN_OFFSET_NORMAL:
2762                         break;
2763         }
2764 
2765         if ((2+NumDirEntries*12) > value_len) {
2766                 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Illegal IFD size: 2 + x%04X*12 = x%04X > x%04X", NumDirEntries, 2+NumDirEntries*12, value_len);
2767                 return FALSE;
2768         }
2769 
2770         for (de=0;de<NumDirEntries;de++) {
2771                 if (!exif_process_IFD_TAG(ImageInfo, dir_start + 2 + 12 * de,
2772                                                                   offset_base, IFDlength, displacement, section_index, 0, maker_note->tag_table)) {
2773                         return FALSE;
2774                 }
2775         }
2776         ImageInfo->motorola_intel = old_motorola_intel;
2777 /*      NextDirOffset (must be NULL) = php_ifd_get32u(dir_start+2+12*de, ImageInfo->motorola_intel);*/
2778 #ifdef EXIF_DEBUG
2779         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Subsection %s done", exif_get_sectionname(SECTION_MAKERNOTE));
2780 #endif
2781         return TRUE;
2782 }
2783 /* }}} */
2784 
2785 /* {{{ exif_process_IFD_TAG
2786  * Process one of the nested IFDs directories. */
2787 static int exif_process_IFD_TAG(image_info_type *ImageInfo, char *dir_entry, char *offset_base, size_t IFDlength, size_t displacement, int section_index, int ReadNextIFD, tag_table_type tag_table)
2788 {
2789         size_t length;
2790         int tag, format, components;
2791         char *value_ptr, tagname[64], cbuf[32], *outside=NULL;
2792         size_t byte_count, offset_val, fpos, fgot;
2793         int64_t byte_count_signed;
2794         xp_field_type *tmp_xp;
2795 #ifdef EXIF_DEBUG
2796         char *dump_data;
2797         int dump_free;
2798 #endif /* EXIF_DEBUG */
2799 
2800         /* Protect against corrupt headers */
2801         if (ImageInfo->ifd_nesting_level > MAX_IFD_NESTING_LEVEL) {
2802                 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "corrupt EXIF header: maximum directory nesting level reached");
2803                 return FALSE;
2804         }
2805         ImageInfo->ifd_nesting_level++;
2806 
2807         tag = php_ifd_get16u(dir_entry, ImageInfo->motorola_intel);
2808         format = php_ifd_get16u(dir_entry+2, ImageInfo->motorola_intel);
2809         components = php_ifd_get32u(dir_entry+4, ImageInfo->motorola_intel);
2810 
2811         if (!format || format > NUM_FORMATS) {
2812                 /* (-1) catches illegal zero case as unsigned underflows to positive large. */
2813                 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Process tag(x%04X=%s): Illegal format code 0x%04X, suppose BYTE", tag, exif_get_tagname(tag, tagname, -12, tag_table), format);
2814                 format = TAG_FMT_BYTE;
2815                 /*return TRUE;*/
2816         }
2817 
2818         if (components < 0) {
2819                 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Process tag(x%04X=%s): Illegal components(%ld)", tag, exif_get_tagname(tag, tagname, -12, tag_table), components);
2820                 return FALSE;
2821         }
2822 
2823         byte_count_signed = (int64_t)components * php_tiff_bytes_per_format[format];
2824 
2825         if (byte_count_signed < 0 || (byte_count_signed > INT32_MAX)) {
2826                 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Process tag(x%04X=%s): Illegal byte_count", tag, exif_get_tagname(tag, tagname, -12, tag_table));
2827                 return FALSE;
2828         }
2829 
2830         byte_count = (size_t)byte_count_signed;
2831 
2832         if (byte_count > 4) {
2833                 offset_val = php_ifd_get32u(dir_entry+8, ImageInfo->motorola_intel);
2834                 /* If its bigger than 4 bytes, the dir entry contains an offset. */
2835                 value_ptr = offset_base+offset_val;
2836         /*
2837             dir_entry is ImageInfo->file.list[sn].data+2+i*12
2838             offset_base is ImageInfo->file.list[sn].data-dir_offset
2839             dir_entry - offset_base is dir_offset+2+i*12
2840         */
2841                 if (byte_count > IFDlength || offset_val > IFDlength-byte_count || value_ptr < dir_entry || offset_val < (size_t)(dir_entry-offset_base)) {
2842                         /* It is important to check for IMAGE_FILETYPE_TIFF
2843                          * JPEG does not use absolute pointers instead its pointers are
2844                          * relative to the start of the TIFF header in APP1 section. */
2845                         if (byte_count > ImageInfo->FileSize || offset_val>ImageInfo->FileSize-byte_count || (ImageInfo->FileType!=IMAGE_FILETYPE_TIFF_II && ImageInfo->FileType!=IMAGE_FILETYPE_TIFF_MM && ImageInfo->FileType!=IMAGE_FILETYPE_JPEG)) {
2846                                 if (value_ptr < dir_entry) {
2847                                         /* we can read this if offset_val > 0 */
2848                                         /* some files have their values in other parts of the file */
2849                                         exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Process tag(x%04X=%s): Illegal pointer offset(x%04X < x%04X)", tag, exif_get_tagname(tag, tagname, -12, tag_table), offset_val, dir_entry);
2850                                 } else {
2851                                         /* this is for sure not allowed */
2852                                         /* exception are IFD pointers */
2853                                         exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Process tag(x%04X=%s): Illegal pointer offset(x%04X + x%04X = x%04X > x%04X)", tag, exif_get_tagname(tag, tagname, -12, tag_table), offset_val, byte_count, offset_val+byte_count, IFDlength);
2854                                 }
2855                                 return FALSE;
2856                         }
2857                         if (byte_count>sizeof(cbuf)) {
2858                                 /* mark as outside range and get buffer */
2859                                 value_ptr = safe_emalloc(byte_count, 1, 0);
2860                                 outside = value_ptr;
2861                         } else {
2862                                 /* In most cases we only access a small range so
2863                                  * it is faster to use a static buffer there
2864                                  * BUT it offers also the possibility to have
2865                                  * pointers read without the need to free them
2866                                  * explicitley before returning. */
2867                                 memset(&cbuf, 0, sizeof(cbuf));
2868                                 value_ptr = cbuf;
2869                         }
2870 
2871                         fpos = php_stream_tell(ImageInfo->infile);
2872                         php_stream_seek(ImageInfo->infile, offset_val, SEEK_SET);
2873                         fgot = php_stream_tell(ImageInfo->infile);
2874                         if (fgot!=offset_val) {
2875                                 EFREE_IF(outside);
2876                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Wrong file pointer: 0x%08X != 0x%08X", fgot, offset_val);
2877                                 return FALSE;
2878                         }
2879                         fgot = php_stream_read(ImageInfo->infile, value_ptr, byte_count);
2880                         php_stream_seek(ImageInfo->infile, fpos, SEEK_SET);
2881                         if (fgot<byte_count) {
2882                                 EFREE_IF(outside);
2883                                 EXIF_ERRLOG_FILEEOF(ImageInfo)
2884                                 return FALSE;
2885                         }
2886                 }
2887         } else {
2888                 /* 4 bytes or less and value is in the dir entry itself */
2889                 value_ptr = dir_entry+8;
2890                 offset_val= value_ptr-offset_base;
2891         }
2892 
2893         ImageInfo->sections_found |= FOUND_ANY_TAG;
2894 #ifdef EXIF_DEBUG
2895         dump_data = exif_dump_data(&dump_free, format, components, length, ImageInfo->motorola_intel, value_ptr);
2896         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Process tag(x%04X=%s,@x%04X + x%04X(=%d)): %s%s %s", tag, exif_get_tagname(tag, tagname, -12, tag_table), offset_val+displacement, byte_count, byte_count, (components>1)&&format!=TAG_FMT_UNDEFINED&&format!=TAG_FMT_STRING?"ARRAY OF ":"", exif_get_tagformat(format), dump_data);
2897         if (dump_free) {
2898                 efree(dump_data);
2899         }
2900 #endif
2901 
2902         if (section_index==SECTION_THUMBNAIL) {
2903                 if (!ImageInfo->Thumbnail.data) {
2904                         switch(tag) {
2905                                 case TAG_IMAGEWIDTH:
2906                                 case TAG_COMP_IMAGE_WIDTH:
2907                                         ImageInfo->Thumbnail.width = exif_convert_any_to_int(value_ptr, format, ImageInfo->motorola_intel);
2908                                         break;
2909 
2910                                 case TAG_IMAGEHEIGHT:
2911                                 case TAG_COMP_IMAGE_HEIGHT:
2912                                         ImageInfo->Thumbnail.height = exif_convert_any_to_int(value_ptr, format, ImageInfo->motorola_intel);
2913                                         break;
2914 
2915                                 case TAG_STRIP_OFFSETS:
2916                                 case TAG_JPEG_INTERCHANGE_FORMAT:
2917                                         /* accept both formats */
2918                                         ImageInfo->Thumbnail.offset = exif_convert_any_to_int(value_ptr, format, ImageInfo->motorola_intel);
2919                                         break;
2920 
2921                                 case TAG_STRIP_BYTE_COUNTS:
2922                                         if (ImageInfo->FileType == IMAGE_FILETYPE_TIFF_II || ImageInfo->FileType == IMAGE_FILETYPE_TIFF_MM) {
2923                                                 ImageInfo->Thumbnail.filetype = ImageInfo->FileType;
2924                                         } else {
2925                                                 /* motorola is easier to read */
2926                                                 ImageInfo->Thumbnail.filetype = IMAGE_FILETYPE_TIFF_MM;
2927                                         }
2928                                         ImageInfo->Thumbnail.size = exif_convert_any_to_int(value_ptr, format, ImageInfo->motorola_intel);
2929                                         break;
2930 
2931                                 case TAG_JPEG_INTERCHANGE_FORMAT_LEN:
2932                                         if (ImageInfo->Thumbnail.filetype == IMAGE_FILETYPE_UNKNOWN) {
2933                                                 ImageInfo->Thumbnail.filetype = IMAGE_FILETYPE_JPEG;
2934                                                 ImageInfo->Thumbnail.size = exif_convert_any_to_int(value_ptr, format, ImageInfo->motorola_intel);
2935                                         }
2936                                         break;
2937                         }
2938                 }
2939         } else {
2940                 if (section_index==SECTION_IFD0 || section_index==SECTION_EXIF)
2941                 switch(tag) {
2942                         case TAG_COPYRIGHT:
2943                                 /* check for "<photographer> NUL <editor> NUL" */
2944                                 if (byte_count>1 && (length=php_strnlen(value_ptr, byte_count)) > 0) {
2945                                         if (length<byte_count-1) {
2946                                                 /* When there are any characters after the first NUL */
2947                                                 ImageInfo->CopyrightPhotographer  = estrdup(value_ptr);
2948                                                 ImageInfo->CopyrightEditor        = estrndup(value_ptr+length+1, byte_count-length-1);
2949                                                 spprintf(&ImageInfo->Copyright, 0, "%s, %s", value_ptr, value_ptr+length+1);
2950                                                 /* format = TAG_FMT_UNDEFINED; this musn't be ASCII         */
2951                                                 /* but we are not supposed to change this                   */
2952                                                 /* keep in mind that image_info does not store editor value */
2953                                         } else {
2954                                                 ImageInfo->Copyright = estrndup(value_ptr, byte_count);
2955                                         }
2956                                 }
2957                                 break;
2958 
2959                         case TAG_USERCOMMENT:
2960                                 ImageInfo->UserCommentLength = exif_process_user_comment(ImageInfo, &(ImageInfo->UserComment), &(ImageInfo->UserCommentEncoding), value_ptr, byte_count);
2961                                 break;
2962 
2963                         case TAG_XP_TITLE:
2964                         case TAG_XP_COMMENTS:
2965                         case TAG_XP_AUTHOR:
2966                         case TAG_XP_KEYWORDS:
2967                         case TAG_XP_SUBJECT:
2968                                 tmp_xp = (xp_field_type*)safe_erealloc(ImageInfo->xp_fields.list, (ImageInfo->xp_fields.count+1), sizeof(xp_field_type), 0);
2969                                 ImageInfo->sections_found |= FOUND_WINXP;
2970                                 ImageInfo->xp_fields.list = tmp_xp;
2971                                 ImageInfo->xp_fields.count++;
2972                                 exif_process_unicode(ImageInfo, &(ImageInfo->xp_fields.list[ImageInfo->xp_fields.count-1]), tag, value_ptr, byte_count);
2973                                 break;
2974 
2975                         case TAG_FNUMBER:
2976                                 /* Simplest way of expressing aperture, so I trust it the most.
2977                                    (overwrite previously computed value if there is one) */
2978                                 ImageInfo->ApertureFNumber = (float)exif_convert_any_format(value_ptr, format, ImageInfo->motorola_intel);
2979                                 break;
2980 
2981                         case TAG_APERTURE:
2982                         case TAG_MAX_APERTURE:
2983                                 /* More relevant info always comes earlier, so only use this field if we don't
2984                                    have appropriate aperture information yet. */
2985                                 if (ImageInfo->ApertureFNumber == 0) {
2986                                         ImageInfo->ApertureFNumber
2987                                                 = (float)exp(exif_convert_any_format(value_ptr, format, ImageInfo->motorola_intel)*log(2)*0.5);
2988                                 }
2989                                 break;
2990 
2991                         case TAG_SHUTTERSPEED:
2992                                 /* More complicated way of expressing exposure time, so only use
2993                                    this value if we don't already have it from somewhere else.
2994                                    SHUTTERSPEED comes after EXPOSURE TIME
2995                                   */
2996                                 if (ImageInfo->ExposureTime == 0) {
2997                                         ImageInfo->ExposureTime
2998                                                 = (float)(1/exp(exif_convert_any_format(value_ptr, format, ImageInfo->motorola_intel)*log(2)));
2999                                 }
3000                                 break;
3001                         case TAG_EXPOSURETIME:
3002                                 ImageInfo->ExposureTime = -1;
3003                                 break;
3004 
3005                         case TAG_COMP_IMAGE_WIDTH:
3006                                 ImageInfo->ExifImageWidth = exif_convert_any_to_int(value_ptr, format, ImageInfo->motorola_intel);
3007                                 break;
3008 
3009                         case TAG_FOCALPLANE_X_RES:
3010                                 ImageInfo->FocalplaneXRes = exif_convert_any_format(value_ptr, format, ImageInfo->motorola_intel);
3011                                 break;
3012 
3013                         case TAG_SUBJECT_DISTANCE:
3014                                 /* Inidcates the distacne the autofocus camera is focused to.
3015                                    Tends to be less accurate as distance increases. */
3016                                 ImageInfo->Distance = (float)exif_convert_any_format(value_ptr, format, ImageInfo->motorola_intel);
3017                                 break;
3018 
3019                         case TAG_FOCALPLANE_RESOLUTION_UNIT:
3020                                 switch((int)exif_convert_any_format(value_ptr, format, ImageInfo->motorola_intel)) {
3021                                         case 1: ImageInfo->FocalplaneUnits = 25.4; break; /* inch */
3022                                         case 2:
3023                                                 /* According to the information I was using, 2 measn meters.
3024                                                    But looking at the Cannon powershot's files, inches is the only
3025                                                    sensible value. */
3026                                                 ImageInfo->FocalplaneUnits = 25.4;
3027                                                 break;
3028 
3029                                         case 3: ImageInfo->FocalplaneUnits = 10;   break;  /* centimeter */
3030                                         case 4: ImageInfo->FocalplaneUnits = 1;    break;  /* milimeter  */
3031                                         case 5: ImageInfo->FocalplaneUnits = .001; break;  /* micrometer */
3032                                 }
3033                                 break;
3034 
3035                         case TAG_SUB_IFD:
3036                                 if (format==TAG_FMT_IFD) {
3037                                         /* If this is called we are either in a TIFFs thumbnail or a JPEG where we cannot handle it */
3038                                         /* TIFF thumbnail: our data structure cannot store a thumbnail of a thumbnail */
3039                                         /* JPEG do we have the data area and what to do with it */
3040                                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Skip SUB IFD");
3041                                 }
3042                                 break;
3043 
3044                         case TAG_MAKE:
3045                                 ImageInfo->make = estrndup(value_ptr, byte_count);
3046                                 break;
3047                         case TAG_MODEL:
3048                                 ImageInfo->model = estrndup(value_ptr, byte_count);
3049                                 break;
3050 
3051                         case TAG_MAKER_NOTE:
3052                                 exif_process_IFD_in_MAKERNOTE(ImageInfo, value_ptr, byte_count, offset_base, IFDlength, displacement);
3053                                 break;
3054 
3055                         case TAG_EXIF_IFD_POINTER:
3056                         case TAG_GPS_IFD_POINTER:
3057                         case TAG_INTEROP_IFD_POINTER:
3058                                 if (ReadNextIFD) {
3059                                         char *Subdir_start;
3060                                         int sub_section_index = 0;
3061                                         switch(tag) {
3062                                                 case TAG_EXIF_IFD_POINTER:
3063 #ifdef EXIF_DEBUG
3064                                                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Found EXIF");
3065 #endif
3066                                                         ImageInfo->sections_found |= FOUND_EXIF;
3067                                                         sub_section_index = SECTION_EXIF;
3068                                                         break;
3069                                                 case TAG_GPS_IFD_POINTER:
3070 #ifdef EXIF_DEBUG
3071                                                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Found GPS");
3072 #endif
3073                                                         ImageInfo->sections_found |= FOUND_GPS;
3074                                                         sub_section_index = SECTION_GPS;
3075                                                         break;
3076                                                 case TAG_INTEROP_IFD_POINTER:
3077 #ifdef EXIF_DEBUG
3078                                                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Found INTEROPERABILITY");
3079 #endif
3080                                                         ImageInfo->sections_found |= FOUND_INTEROP;
3081                                                         sub_section_index = SECTION_INTEROP;
3082                                                         break;
3083                                         }
3084                                         Subdir_start = offset_base + php_ifd_get32u(value_ptr, ImageInfo->motorola_intel);
3085                                         if (Subdir_start < offset_base || Subdir_start > offset_base+IFDlength) {
3086                                                 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Illegal IFD Pointer");
3087                                                 return FALSE;
3088                                         }
3089                                         if (!exif_process_IFD_in_JPEG(ImageInfo, Subdir_start, offset_base, IFDlength, displacement, sub_section_index)) {
3090                                                 return FALSE;
3091                                         }
3092 #ifdef EXIF_DEBUG
3093                                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Subsection %s done", exif_get_sectionname(sub_section_index));
3094 #endif
3095                                 }
3096                 }
3097         }
3098         exif_iif_add_tag(ImageInfo, section_index, exif_get_tagname(tag, tagname, sizeof(tagname), tag_table), tag, format, components, value_ptr);
3099         EFREE_IF(outside);
3100         return TRUE;
3101 }
3102 /* }}} */
3103 
3104 /* {{{ exif_process_IFD_in_JPEG
3105  * Process one of the nested IFDs directories. */
3106 static int exif_process_IFD_in_JPEG(image_info_type *ImageInfo, char *dir_start, char *offset_base, size_t IFDlength, size_t displacement, int section_index)
3107 {
3108         int de;
3109         int NumDirEntries;
3110         int NextDirOffset;
3111 
3112 #ifdef EXIF_DEBUG
3113         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Process %s (x%04X(=%d))", exif_get_sectionname(section_index), IFDlength, IFDlength);
3114 #endif
3115 
3116         ImageInfo->sections_found |= FOUND_IFD0;
3117 
3118         NumDirEntries = php_ifd_get16u(dir_start, ImageInfo->motorola_intel);
3119 
3120         if ((dir_start+2+NumDirEntries*12) > (offset_base+IFDlength)) {
3121                 exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Illegal IFD size: x%04X + 2 + x%04X*12 = x%04X > x%04X", (int)((size_t)dir_start+2-(size_t)offset_base), NumDirEntries, (int)((size_t)dir_start+2+NumDirEntries*12-(size_t)offset_base), IFDlength);
3122                 return FALSE;
3123         }
3124 
3125         for (de=0;de<NumDirEntries;de++) {
3126                 if (!exif_process_IFD_TAG(ImageInfo, dir_start + 2 + 12 * de,
3127                                                                   offset_base, IFDlength, displacement, section_index, 1, exif_get_tag_table(section_index))) {
3128                         return FALSE;
3129                 }
3130         }
3131         /*
3132          * Ignore IFD2 if it purportedly exists
3133          */
3134         if (section_index == SECTION_THUMBNAIL) {
3135                 return TRUE;
3136         }
3137         /*
3138          * Hack to make it process IDF1 I hope
3139          * There are 2 IDFs, the second one holds the keys (0x0201 and 0x0202) to the thumbnail
3140          */
3141         NextDirOffset = php_ifd_get32u(dir_start+2+12*de, ImageInfo->motorola_intel);
3142         if (NextDirOffset) {
3143                 /* the next line seems false but here IFDlength means length of all IFDs */
3144                 if (offset_base + NextDirOffset < offset_base || offset_base + NextDirOffset > offset_base+IFDlength) {
3145                         exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Illegal IFD offset");
3146                         return FALSE;
3147                 }
3148                 /* That is the IFD for the first thumbnail */
3149 #ifdef EXIF_DEBUG
3150                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Expect next IFD to be thumbnail");
3151 #endif
3152                 if (exif_process_IFD_in_JPEG(ImageInfo, offset_base + NextDirOffset, offset_base, IFDlength, displacement, SECTION_THUMBNAIL)) {
3153 #ifdef EXIF_DEBUG
3154                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail size: 0x%04X", ImageInfo->Thumbnail.size);
3155 #endif
3156                         if (ImageInfo->Thumbnail.filetype != IMAGE_FILETYPE_UNKNOWN
3157                         &&  ImageInfo->Thumbnail.size
3158                         &&  ImageInfo->Thumbnail.offset
3159                         &&  ImageInfo->read_thumbnail
3160                         ) {
3161                                 exif_thumbnail_extract(ImageInfo, offset_base, IFDlength);
3162                         }
3163                         return TRUE;
3164                 } else {
3165                         return FALSE;
3166                 }
3167         }
3168         return TRUE;
3169 }
3170 /* }}} */
3171 
3172 /* {{{ exif_process_TIFF_in_JPEG
3173    Process a TIFF header in a JPEG file
3174 */
3175 static void exif_process_TIFF_in_JPEG(image_info_type *ImageInfo, char *CharBuf, size_t length, size_t displacement)
3176 {
3177         unsigned exif_value_2a, offset_of_ifd;
3178 
3179         /* set the thumbnail stuff to nothing so we can test to see if they get set up */
3180         if (memcmp(CharBuf, "II", 2) == 0) {
3181                 ImageInfo->motorola_intel = 0;
3182         } else if (memcmp(CharBuf, "MM", 2) == 0) {
3183                 ImageInfo->motorola_intel = 1;
3184         } else {
3185                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid TIFF alignment marker");
3186                 return;
3187         }
3188 
3189         /* Check the next two values for correctness. */
3190         exif_value_2a = php_ifd_get16u(CharBuf+2, ImageInfo->motorola_intel);
3191         offset_of_ifd = php_ifd_get32u(CharBuf+4, ImageInfo->motorola_intel);
3192         if ( exif_value_2a != 0x2a || offset_of_ifd < 0x08) {
3193                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid TIFF start (1)");
3194                 return;
3195         }
3196         if (offset_of_ifd > length) {
3197                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid IFD start");
3198                 return;
3199         }
3200 
3201         ImageInfo->sections_found |= FOUND_IFD0;
3202         /* First directory starts at offset 8. Offsets starts at 0. */
3203         exif_process_IFD_in_JPEG(ImageInfo, CharBuf+offset_of_ifd, CharBuf, length/*-14*/, displacement, SECTION_IFD0);
3204 
3205 #ifdef EXIF_DEBUG
3206         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Process TIFF in JPEG done");
3207 #endif
3208 
3209         /* Compute the CCD width, in milimeters. */
3210         if (ImageInfo->FocalplaneXRes != 0) {
3211                 ImageInfo->CCDWidth = (float)(ImageInfo->ExifImageWidth * ImageInfo->FocalplaneUnits / ImageInfo->FocalplaneXRes);
3212         }
3213 }
3214 /* }}} */
3215 
3216 /* {{{ exif_process_APP1
3217    Process an JPEG APP1 block marker
3218    Describes all the drivel that most digital cameras include...
3219 */
3220 static void exif_process_APP1(image_info_type *ImageInfo, char *CharBuf, size_t length, size_t displacement)
3221 {
3222         /* Check the APP1 for Exif Identifier Code */
3223         static const uchar ExifHeader[] = {0x45, 0x78, 0x69, 0x66, 0x00, 0x00};
3224         if (length <= 8 || memcmp(CharBuf+2, ExifHeader, 6)) {
3225                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Incorrect APP1 Exif Identifier Code");
3226                 return;
3227         }
3228         exif_process_TIFF_in_JPEG(ImageInfo, CharBuf + 8, length - 8, displacement+8);
3229 #ifdef EXIF_DEBUG
3230         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Process APP1/EXIF done");
3231 #endif
3232 }
3233 /* }}} */
3234 
3235 /* {{{ exif_process_APP12
3236    Process an JPEG APP12 block marker used by OLYMPUS
3237 */
3238 static void exif_process_APP12(image_info_type *ImageInfo, char *buffer, size_t length)
3239 {
3240         size_t l1, l2=0;
3241 
3242         if ((l1 = php_strnlen(buffer+2, length-2)) > 0) {
3243                 exif_iif_add_tag(ImageInfo, SECTION_APP12, "Company", TAG_NONE, TAG_FMT_STRING, l1, buffer+2);
3244                 if (length > 2+l1+1) {
3245                         l2 = php_strnlen(buffer+2+l1+1, length-2-l1-1);
3246                         exif_iif_add_tag(ImageInfo, SECTION_APP12, "Info", TAG_NONE, TAG_FMT_STRING, l2, buffer+2+l1+1);
3247                 }
3248         }
3249 #ifdef EXIF_DEBUG
3250         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Process section APP12 with l1=%d, l2=%d done", l1, l2);
3251 #endif
3252 }
3253 /* }}} */
3254 
3255 /* {{{ exif_scan_JPEG_header
3256  * Parse the marker stream until SOS or EOI is seen; */
3257 static int exif_scan_JPEG_header(image_info_type *ImageInfo)
3258 {
3259         int section, sn;
3260         int marker = 0, last_marker = M_PSEUDO, comment_correction=1;
3261         unsigned int ll, lh;
3262         uchar *Data;
3263         size_t fpos, size, got, itemlen;
3264         jpeg_sof_info  sof_info;
3265 
3266         for(section=0;;section++) {
3267 #ifdef EXIF_DEBUG
3268                 fpos = php_stream_tell(ImageInfo->infile);
3269                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Needing section %d @ 0x%08X", ImageInfo->file.count, fpos);
3270 #endif
3271 
3272                 /* get marker byte, swallowing possible padding                           */
3273                 /* some software does not count the length bytes of COM section           */
3274                 /* one company doing so is very much envolved in JPEG... so we accept too */
3275                 if (last_marker==M_COM && comment_correction) {
3276                         comment_correction = 2;
3277                 }
3278                 do {
3279                         if ((marker = php_stream_getc(ImageInfo->infile)) == EOF) {
3280                                 EXIF_ERRLOG_CORRUPT(ImageInfo)
3281                                 return FALSE;
3282                         }
3283                         if (last_marker==M_COM && comment_correction>0) {
3284                                 if (marker!=0xFF) {
3285                                         marker = 0xff;
3286                                         comment_correction--;
3287                                 } else  {
3288                                         last_marker = M_PSEUDO; /* stop skipping 0 for M_COM */
3289                                 }
3290                         }
3291                 } while (marker == 0xff);
3292                 if (last_marker==M_COM && !comment_correction) {
3293                         exif_error_docref("exif_read_data#error_mcom" EXIFERR_CC, ImageInfo, E_NOTICE, "Image has corrupt COM section: some software set wrong length information");
3294                 }
3295                 if (last_marker==M_COM && comment_correction)
3296                         return M_EOI; /* ah illegal: char after COM section not 0xFF */
3297 
3298                 fpos = php_stream_tell(ImageInfo->infile);
3299 
3300                 if (marker == 0xff) {
3301                         /* 0xff is legal padding, but if we get that many, something's wrong. */
3302                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "To many padding bytes");
3303                         return FALSE;
3304                 }
3305 
3306                 /* Read the length of the section. */
3307                 if ((lh = php_stream_getc(ImageInfo->infile)) == EOF) {
3308                         EXIF_ERRLOG_CORRUPT(ImageInfo)
3309                         return FALSE;
3310                 }
3311                 if ((ll = php_stream_getc(ImageInfo->infile)) == EOF) {
3312                         EXIF_ERRLOG_CORRUPT(ImageInfo)
3313                         return FALSE;
3314                 }
3315 
3316                 itemlen = (lh << 8) | ll;
3317 
3318                 if (itemlen < 2) {
3319 #ifdef EXIF_DEBUG
3320                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "%s, Section length: 0x%02X%02X", EXIF_ERROR_CORRUPT, lh, ll);
3321 #else
3322                         EXIF_ERRLOG_CORRUPT(ImageInfo)
3323 #endif
3324                         return FALSE;
3325                 }
3326 
3327                 sn = exif_file_sections_add(ImageInfo, marker, itemlen+1, NULL);
3328                 Data = ImageInfo->file.list[sn].data;
3329 
3330                 /* Store first two pre-read bytes. */
3331                 Data[0] = (uchar)lh;
3332                 Data[1] = (uchar)ll;
3333 
3334                 got = php_stream_read(ImageInfo->infile, (char*)(Data+2), itemlen-2); /* Read the whole section. */
3335                 if (got != itemlen-2) {
3336                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Error reading from file: got=x%04X(=%d) != itemlen-2=x%04X(=%d)", got, got, itemlen-2, itemlen-2);
3337                         return FALSE;
3338                 }
3339 
3340 #ifdef EXIF_DEBUG
3341                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Process section(x%02X=%s) @ x%04X + x%04X(=%d)", marker, exif_get_markername(marker), fpos, itemlen, itemlen);
3342 #endif
3343                 switch(marker) {
3344                         case M_SOS:   /* stop before hitting compressed data  */
3345                                 /* If reading entire image is requested, read the rest of the data. */
3346                                 if (ImageInfo->read_all) {
3347                                         /* Determine how much file is left. */
3348                                         fpos = php_stream_tell(ImageInfo->infile);
3349                                         size = ImageInfo->FileSize - fpos;
3350                                         sn = exif_file_sections_add(ImageInfo, M_PSEUDO, size, NULL);
3351                                         Data = ImageInfo->file.list[sn].data;
3352                                         got = php_stream_read(ImageInfo->infile, (char*)Data, size);
3353                                         if (got != size) {
3354                                                 EXIF_ERRLOG_FILEEOF(ImageInfo)
3355                                                 return FALSE;
3356                                         }
3357                                 }
3358                                 return TRUE;
3359 
3360                         case M_EOI:   /* in case it's a tables-only JPEG stream */
3361                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "No image in jpeg!");
3362                                 return (ImageInfo->sections_found&(~FOUND_COMPUTED)) ? TRUE : FALSE;
3363 
3364                         case M_COM: /* Comment section */
3365                                 exif_process_COM(ImageInfo, (char *)Data, itemlen);
3366                                 break;
3367 
3368                         case M_EXIF:
3369                                 if (!(ImageInfo->sections_found&FOUND_IFD0)) {
3370                                         /*ImageInfo->sections_found |= FOUND_EXIF;*/
3371                                         /* Seen files from some 'U-lead' software with Vivitar scanner
3372                                            that uses marker 31 later in the file (no clue what for!) */
3373                                         exif_process_APP1(ImageInfo, (char *)Data, itemlen, fpos);
3374                                 }
3375                                 break;
3376 
3377                         case M_APP12:
3378                                 exif_process_APP12(ImageInfo, (char *)Data, itemlen);
3379                                 break;
3380 
3381 
3382                         case M_SOF0:
3383                         case M_SOF1:
3384                         case M_SOF2:
3385                         case M_SOF3:
3386                         case M_SOF5:
3387                         case M_SOF6:
3388                         case M_SOF7:
3389                         case M_SOF9:
3390                         case M_SOF10:
3391                         case M_SOF11:
3392                         case M_SOF13:
3393                         case M_SOF14:
3394                         case M_SOF15:
3395                                 if ((itemlen - 2) < 6) {
3396                                         return FALSE;
3397                                 }
3398 
3399                                 exif_process_SOFn(Data, marker, &sof_info);
3400                                 ImageInfo->Width  = sof_info.width;
3401                                 ImageInfo->Height = sof_info.height;
3402                                 if (sof_info.num_components == 3) {
3403                                         ImageInfo->IsColor = 1;
3404                                 } else {
3405                                         ImageInfo->IsColor = 0;
3406                                 }
3407                                 break;
3408                         default:
3409                                 /* skip any other marker silently. */
3410                                 break;
3411                 }
3412 
3413                 /* keep track of last marker */
3414                 last_marker = marker;
3415         }
3416 #ifdef EXIF_DEBUG
3417         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Done");
3418 #endif
3419         return TRUE;
3420 }
3421 /* }}} */
3422 
3423 /* {{{ exif_scan_thumbnail
3424  * scan JPEG in thumbnail (memory) */
3425 static int exif_scan_thumbnail(image_info_type *ImageInfo)
3426 {
3427         uchar           c, *data = (uchar*)ImageInfo->Thumbnail.data;
3428         int             n, marker;
3429         size_t          length=2, pos=0;
3430         jpeg_sof_info   sof_info;
3431 
3432         if (!data) {
3433                 return FALSE; /* nothing to do here */
3434         }
3435         if (memcmp(data, "\xFF\xD8\xFF", 3)) {
3436                 if (!ImageInfo->Thumbnail.width && !ImageInfo->Thumbnail.height) {
3437                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Thumbnail is not a JPEG image");
3438                 }
3439                 return FALSE;
3440         }
3441         for (;;) {
3442                 pos += length;
3443                 if (pos>=ImageInfo->Thumbnail.size)
3444                         return FALSE;
3445                 c = data[pos++];
3446                 if (pos>=ImageInfo->Thumbnail.size)
3447                         return FALSE;
3448                 if (c != 0xFF) {
3449                         return FALSE;
3450                 }
3451                 n = 8;
3452                 while ((c = data[pos++]) == 0xFF && n--) {
3453                         if (pos+3>=ImageInfo->Thumbnail.size)
3454                                 return FALSE;
3455                         /* +3 = pos++ of next check when reaching marker + 2 bytes for length */
3456                 }
3457                 if (c == 0xFF)
3458                         return FALSE;
3459                 marker = c;
3460                 length = php_jpg_get16(data+pos);
3461                 if (pos+length>=ImageInfo->Thumbnail.size) {
3462                         return FALSE;
3463                 }
3464 #ifdef EXIF_DEBUG
3465                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail: process section(x%02X=%s) @ x%04X + x%04X", marker, exif_get_markername(marker), pos, length);
3466 #endif
3467                 switch (marker) {
3468                         case M_SOF0:
3469                         case M_SOF1:
3470                         case M_SOF2:
3471                         case M_SOF3:
3472                         case M_SOF5:
3473                         case M_SOF6:
3474                         case M_SOF7:
3475                         case M_SOF9:
3476                         case M_SOF10:
3477                         case M_SOF11:
3478                         case M_SOF13:
3479                         case M_SOF14:
3480                         case M_SOF15:
3481                                 /* handle SOFn block */
3482                                 exif_process_SOFn(data+pos, marker, &sof_info);
3483                                 ImageInfo->Thumbnail.height   = sof_info.height;
3484                                 ImageInfo->Thumbnail.width    = sof_info.width;
3485 #ifdef EXIF_DEBUG
3486                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Thumbnail: size: %d * %d", sof_info.width, sof_info.height);
3487 #endif
3488                                 return TRUE;
3489 
3490                         case M_SOS:
3491                         case M_EOI:
3492                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Could not compute size of thumbnail");
3493                                 return FALSE;
3494                                 break;
3495 
3496                         default:
3497                                 /* just skip */
3498                                 break;
3499                 }
3500         }
3501 
3502         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Could not compute size of thumbnail");
3503         return FALSE;
3504 }
3505 /* }}} */
3506 
3507 /* {{{ exif_process_IFD_in_TIFF
3508  * Parse the TIFF header; */
3509 static int exif_process_IFD_in_TIFF(image_info_type *ImageInfo, size_t dir_offset, int section_index)
3510 {
3511         int i, sn, num_entries, sub_section_index = 0;
3512         unsigned char *dir_entry;
3513         char tagname[64];
3514         size_t ifd_size, dir_size, entry_offset, next_offset, entry_length, entry_value=0, fgot;
3515         int entry_tag , entry_type;
3516         tag_table_type tag_table = exif_get_tag_table(section_index);
3517 
3518         if (ImageInfo->ifd_nesting_level > MAX_IFD_NESTING_LEVEL) {
3519                 return FALSE;
3520         }
3521 
3522         if (ImageInfo->FileSize >= dir_offset+2) {
3523                 sn = exif_file_sections_add(ImageInfo, M_PSEUDO, 2, NULL);
3524 #ifdef EXIF_DEBUG
3525                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read from TIFF: filesize(x%04X), IFD dir(x%04X + x%04X)", ImageInfo->FileSize, dir_offset, 2);
3526 #endif
3527                 php_stream_seek(ImageInfo->infile, dir_offset, SEEK_SET); /* we do not know the order of sections */
3528                 php_stream_read(ImageInfo->infile, (char*)ImageInfo->file.list[sn].data, 2);
3529                 num_entries = php_ifd_get16u(ImageInfo->file.list[sn].data, ImageInfo->motorola_intel);
3530                 dir_size = 2/*num dir entries*/ +12/*length of entry*/*num_entries +4/* offset to next ifd (points to thumbnail or NULL)*/;
3531                 if (ImageInfo->FileSize >= dir_offset+dir_size) {
3532 #ifdef EXIF_DEBUG
3533                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read from TIFF: filesize(x%04X), IFD dir(x%04X + x%04X), IFD entries(%d)", ImageInfo->FileSize, dir_offset+2, dir_size-2, num_entries);
3534 #endif
3535                         if (exif_file_sections_realloc(ImageInfo, sn, dir_size)) {
3536                                 return FALSE;
3537                         }
3538                         php_stream_read(ImageInfo->infile, (char*)(ImageInfo->file.list[sn].data+2), dir_size-2);
3539                         /*exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Dump: %s", exif_char_dump(ImageInfo->file.list[sn].data, dir_size, 0));*/
3540                         next_offset = php_ifd_get32u(ImageInfo->file.list[sn].data + dir_size - 4, ImageInfo->motorola_intel);
3541 #ifdef EXIF_DEBUG
3542                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read from TIFF done, next offset x%04X", next_offset);
3543 #endif
3544                         /* now we have the directory we can look how long it should be */
3545                         ifd_size = dir_size;
3546                         for(i=0;i<num_entries;i++) {
3547                                 dir_entry        = ImageInfo->file.list[sn].data+2+i*12;
3548                                 entry_tag    = php_ifd_get16u(dir_entry+0, ImageInfo->motorola_intel);
3549                                 entry_type   = php_ifd_get16u(dir_entry+2, ImageInfo->motorola_intel);
3550                                 if (entry_type > NUM_FORMATS) {
3551                                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read from TIFF: tag(0x%04X,%12s): Illegal format code 0x%04X, switching to BYTE", entry_tag, exif_get_tagname(entry_tag, tagname, -12, tag_table), entry_type);
3552                                         /* Since this is repeated in exif_process_IFD_TAG make it a notice here */
3553                                         /* and make it a warning in the exif_process_IFD_TAG which is called    */
3554                                         /* elsewhere. */
3555                                         entry_type = TAG_FMT_BYTE;
3556                                         /*The next line would break the image on writeback: */
3557                                         /* php_ifd_set16u(dir_entry+2, entry_type, ImageInfo->motorola_intel);*/
3558                                 }
3559                                 entry_length = php_ifd_get32u(dir_entry+4, ImageInfo->motorola_intel) * php_tiff_bytes_per_format[entry_type];
3560                                 if (entry_length <= 4) {
3561                                         switch(entry_type) {
3562                                                 case TAG_FMT_USHORT:
3563                                                         entry_value  = php_ifd_get16u(dir_entry+8, ImageInfo->motorola_intel);
3564                                                         break;
3565                                                 case TAG_FMT_SSHORT:
3566                                                         entry_value  = php_ifd_get16s(dir_entry+8, ImageInfo->motorola_intel);
3567                                                         break;
3568                                                 case TAG_FMT_ULONG:
3569                                                         entry_value  = php_ifd_get32u(dir_entry+8, ImageInfo->motorola_intel);
3570                                                         break;
3571                                                 case TAG_FMT_SLONG:
3572                                                         entry_value  = php_ifd_get32s(dir_entry+8, ImageInfo->motorola_intel);
3573                                                         break;
3574                                         }
3575                                         switch(entry_tag) {
3576                                                 case TAG_IMAGEWIDTH:
3577                                                 case TAG_COMP_IMAGE_WIDTH:
3578                                                         ImageInfo->Width  = entry_value;
3579                                                         break;
3580                                                 case TAG_IMAGEHEIGHT:
3581                                                 case TAG_COMP_IMAGE_HEIGHT:
3582                                                         ImageInfo->Height = entry_value;
3583                                                         break;
3584                                                 case TAG_PHOTOMETRIC_INTERPRETATION:
3585                                                         switch (entry_value) {
3586                                                                 case PMI_BLACK_IS_ZERO:
3587                                                                 case PMI_WHITE_IS_ZERO:
3588                                                                 case PMI_TRANSPARENCY_MASK:
3589                                                                         ImageInfo->IsColor = 0;
3590                                                                         break;
3591                                                                 case PMI_RGB:
3592                                                                 case PMI_PALETTE_COLOR:
3593                                                                 case PMI_SEPARATED:
3594                                                                 case PMI_YCBCR:
3595                                                                 case PMI_CIELAB:
3596                                                                         ImageInfo->IsColor = 1;
3597                                                                         break;
3598                                                         }
3599                                                         break;
3600                                         }
3601                                 } else {
3602                                         entry_offset = php_ifd_get32u(dir_entry+8, ImageInfo->motorola_intel);
3603                                         /* if entry needs expading ifd cache and entry is at end of current ifd cache. */
3604                                         /* otherwise there may be huge holes between two entries */
3605                                         if (entry_offset + entry_length > dir_offset + ifd_size
3606                                           && entry_offset == dir_offset + ifd_size) {
3607                                                 ifd_size = entry_offset + entry_length - dir_offset;
3608 #ifdef EXIF_DEBUG
3609                                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Resize struct: x%04X + x%04X - x%04X = x%04X", entry_offset, entry_length, dir_offset, ifd_size);
3610 #endif
3611                                         }
3612                                 }
3613                         }
3614                         if (ImageInfo->FileSize >= dir_offset + ImageInfo->file.list[sn].size) {
3615                                 if (ifd_size > dir_size) {
3616                                         if (dir_offset + ifd_size > ImageInfo->FileSize) {
3617                                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Error in TIFF: filesize(x%04X) less than size of IFD(x%04X + x%04X)", ImageInfo->FileSize, dir_offset, ifd_size);
3618                                                 return FALSE;
3619                                         }
3620                                         if (exif_file_sections_realloc(ImageInfo, sn, ifd_size)) {
3621                                                 return FALSE;
3622                                         }
3623                                         /* read values not stored in directory itself */
3624 #ifdef EXIF_DEBUG
3625                                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read from TIFF: filesize(x%04X), IFD(x%04X + x%04X)", ImageInfo->FileSize, dir_offset, ifd_size);
3626 #endif
3627                                         php_stream_read(ImageInfo->infile, (char*)(ImageInfo->file.list[sn].data+dir_size), ifd_size-dir_size);
3628 #ifdef EXIF_DEBUG
3629                                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read from TIFF, done");
3630 #endif
3631                                 }
3632                                 /* now process the tags */
3633                                 for(i=0;i<num_entries;i++) {
3634                                         dir_entry        = ImageInfo->file.list[sn].data+2+i*12;
3635                                         entry_tag    = php_ifd_get16u(dir_entry+0, ImageInfo->motorola_intel);
3636                                         entry_type   = php_ifd_get16u(dir_entry+2, ImageInfo->motorola_intel);
3637                                         /*entry_length = php_ifd_get32u(dir_entry+4, ImageInfo->motorola_intel);*/
3638                                         if (entry_tag == TAG_EXIF_IFD_POINTER ||
3639                                                 entry_tag == TAG_INTEROP_IFD_POINTER ||
3640                                                 entry_tag == TAG_GPS_IFD_POINTER ||
3641                                                 entry_tag == TAG_SUB_IFD
3642                                         ) {
3643                                                 switch(entry_tag) {
3644                                                         case TAG_EXIF_IFD_POINTER:
3645                                                                 ImageInfo->sections_found |= FOUND_EXIF;
3646                                                                 sub_section_index = SECTION_EXIF;
3647                                                                 break;
3648                                                         case TAG_GPS_IFD_POINTER:
3649                                                                 ImageInfo->sections_found |= FOUND_GPS;
3650                                                                 sub_section_index = SECTION_GPS;
3651                                                                 break;
3652                                                         case TAG_INTEROP_IFD_POINTER:
3653                                                                 ImageInfo->sections_found |= FOUND_INTEROP;
3654                                                                 sub_section_index = SECTION_INTEROP;
3655                                                                 break;
3656                                                         case TAG_SUB_IFD:
3657                                                                 ImageInfo->sections_found |= FOUND_THUMBNAIL;
3658                                                                 sub_section_index = SECTION_THUMBNAIL;
3659                                                                 break;
3660                                                 }
3661                                                 entry_offset = php_ifd_get32u(dir_entry+8, ImageInfo->motorola_intel);
3662 #ifdef EXIF_DEBUG
3663                                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Next IFD: %s @x%04X", exif_get_sectionname(sub_section_index), entry_offset);
3664 #endif
3665                                                 ImageInfo->ifd_nesting_level++;
3666                                                 exif_process_IFD_in_TIFF(ImageInfo, entry_offset, sub_section_index);
3667                                                 if (section_index!=SECTION_THUMBNAIL && entry_tag==TAG_SUB_IFD) {
3668                                                         if (ImageInfo->Thumbnail.filetype != IMAGE_FILETYPE_UNKNOWN
3669                                                         &&  ImageInfo->Thumbnail.size
3670                                                         &&  ImageInfo->Thumbnail.offset
3671                                                         &&  ImageInfo->read_thumbnail
3672                                                         ) {
3673 #ifdef EXIF_DEBUG
3674                                                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "%s THUMBNAIL @0x%04X + 0x%04X", ImageInfo->Thumbnail.data ? "Ignore" : "Read", ImageInfo->Thumbnail.offset, ImageInfo->Thumbnail.size);
3675 #endif
3676                                                                 if (!ImageInfo->Thumbnail.data) {
3677                                                                         ImageInfo->Thumbnail.data = safe_emalloc(ImageInfo->Thumbnail.size, 1, 0);
3678                                                                         php_stream_seek(ImageInfo->infile, ImageInfo->Thumbnail.offset, SEEK_SET);
3679                                                                         fgot = php_stream_read(ImageInfo->infile, ImageInfo->Thumbnail.data, ImageInfo->Thumbnail.size);
3680                                                                         if (fgot < ImageInfo->Thumbnail.size) {
3681                                                                                 EXIF_ERRLOG_THUMBEOF(ImageInfo)
3682                                                                         }
3683                                                                         exif_thumbnail_build(ImageInfo);
3684                                                                 }
3685                                                         }
3686                                                 }
3687 #ifdef EXIF_DEBUG
3688                                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Next IFD: %s done", exif_get_sectionname(sub_section_index));
3689 #endif
3690                                         } else {
3691                                                 if (!exif_process_IFD_TAG(ImageInfo, (char*)dir_entry,
3692                                                                                                   (char*)(ImageInfo->file.list[sn].data-dir_offset),
3693                                                                                                   ifd_size, 0, section_index, 0, tag_table)) {
3694                                                         return FALSE;
3695                                                 }
3696                                         }
3697                                 }
3698                                 /* If we had a thumbnail in a SUB_IFD we have ANOTHER image in NEXT IFD */
3699                                 if (next_offset && section_index != SECTION_THUMBNAIL) {
3700                                         /* this should be a thumbnail IFD */
3701                                         /* the thumbnail itself is stored at Tag=StripOffsets */
3702 #ifdef EXIF_DEBUG
3703                                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read next IFD (THUMBNAIL) at x%04X", next_offset);
3704 #endif
3705                                         ImageInfo->ifd_nesting_level++;
3706                                         exif_process_IFD_in_TIFF(ImageInfo, next_offset, SECTION_THUMBNAIL);
3707 #ifdef EXIF_DEBUG
3708                                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "%s THUMBNAIL @0x%04X + 0x%04X", ImageInfo->Thumbnail.data ? "Ignore" : "Read", ImageInfo->Thumbnail.offset, ImageInfo->Thumbnail.size);
3709 #endif
3710                                         if (!ImageInfo->Thumbnail.data && ImageInfo->Thumbnail.offset && ImageInfo->Thumbnail.size && ImageInfo->read_thumbnail) {
3711                                                 ImageInfo->Thumbnail.data = safe_emalloc(ImageInfo->Thumbnail.size, 1, 0);
3712                                                 php_stream_seek(ImageInfo->infile, ImageInfo->Thumbnail.offset, SEEK_SET);
3713                                                 fgot = php_stream_read(ImageInfo->infile, ImageInfo->Thumbnail.data, ImageInfo->Thumbnail.size);
3714                                                 if (fgot < ImageInfo->Thumbnail.size) {
3715                                                         EXIF_ERRLOG_THUMBEOF(ImageInfo)
3716                                                 }
3717                                                 exif_thumbnail_build(ImageInfo);
3718                                         }
3719 #ifdef EXIF_DEBUG
3720                                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read next IFD (THUMBNAIL) done");
3721 #endif
3722                                 }
3723                                 return TRUE;
3724                         } else {
3725                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Error in TIFF: filesize(x%04X) less than size of IFD(x%04X)", ImageInfo->FileSize, dir_offset+ImageInfo->file.list[sn].size);
3726                                 return FALSE;
3727                         }
3728                 } else {
3729                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Error in TIFF: filesize(x%04X) less than size of IFD dir(x%04X)", ImageInfo->FileSize, dir_offset+dir_size);
3730                         return FALSE;
3731                 }
3732         } else {
3733                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Error in TIFF: filesize(x%04X) less than start of IFD dir(x%04X)", ImageInfo->FileSize, dir_offset+2);
3734                 return FALSE;
3735         }
3736 }
3737 /* }}} */
3738 
3739 /* {{{ exif_scan_FILE_header
3740  * Parse the marker stream until SOS or EOI is seen; */
3741 static int exif_scan_FILE_header(image_info_type *ImageInfo)
3742 {
3743         unsigned char file_header[8];
3744         int ret = FALSE;
3745 
3746         ImageInfo->FileType = IMAGE_FILETYPE_UNKNOWN;
3747 
3748         if (ImageInfo->FileSize >= 2) {
3749                 php_stream_seek(ImageInfo->infile, 0, SEEK_SET);
3750                 if (php_stream_read(ImageInfo->infile, (char*)file_header, 2) != 2) {
3751                         return FALSE;
3752                 }
3753                 if ((file_header[0]==0xff) && (file_header[1]==M_SOI)) {
3754                         ImageInfo->FileType = IMAGE_FILETYPE_JPEG;
3755                         if (exif_scan_JPEG_header(ImageInfo)) {
3756                                 ret = TRUE;
3757                         } else {
3758                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid JPEG file");
3759                         }
3760                 } else if (ImageInfo->FileSize >= 8) {
3761                         if (php_stream_read(ImageInfo->infile, (char*)(file_header+2), 6) != 6) {
3762                                 return FALSE;
3763                         }
3764                         if (!memcmp(file_header, "II\x2A\x00", 4)) {
3765                                 ImageInfo->FileType = IMAGE_FILETYPE_TIFF_II;
3766                                 ImageInfo->motorola_intel = 0;
3767 #ifdef EXIF_DEBUG
3768                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "File has TIFF/II format");
3769 #endif
3770                                 ImageInfo->sections_found |= FOUND_IFD0;
3771                                 if (exif_process_IFD_in_TIFF(ImageInfo,
3772                                                                                          php_ifd_get32u(file_header + 4, ImageInfo->motorola_intel),
3773                                                                                          SECTION_IFD0)) {
3774                                         ret = TRUE;
3775                                 } else {
3776                                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid TIFF file");
3777                                 }
3778                         } else if (!memcmp(file_header, "MM\x00\x2a", 4)) {
3779                                 ImageInfo->FileType = IMAGE_FILETYPE_TIFF_MM;
3780                                 ImageInfo->motorola_intel = 1;
3781 #ifdef EXIF_DEBUG
3782                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "File has TIFF/MM format");
3783 #endif
3784                                 ImageInfo->sections_found |= FOUND_IFD0;
3785                                 if (exif_process_IFD_in_TIFF(ImageInfo,
3786                                                                                          php_ifd_get32u(file_header + 4, ImageInfo->motorola_intel),
3787                                                                                          SECTION_IFD0)) {
3788                                         ret = TRUE;
3789                                 } else {
3790                                         exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Invalid TIFF file");
3791                                 }
3792                         } else {
3793                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "File not supported");
3794                                 return FALSE;
3795                         }
3796                 }
3797         } else {
3798                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "File too small (%d)", ImageInfo->FileSize);
3799         }
3800         return ret;
3801 }
3802 /* }}} */
3803 
3804 /* {{{ exif_discard_imageinfo
3805    Discard data scanned by exif_read_file.
3806 */
3807 static int exif_discard_imageinfo(image_info_type *ImageInfo)
3808 {
3809         int i;
3810 
3811         EFREE_IF(ImageInfo->FileName);
3812         EFREE_IF(ImageInfo->UserComment);
3813         EFREE_IF(ImageInfo->UserCommentEncoding);
3814         EFREE_IF(ImageInfo->Copyright);
3815         EFREE_IF(ImageInfo->CopyrightPhotographer);
3816         EFREE_IF(ImageInfo->CopyrightEditor);
3817         EFREE_IF(ImageInfo->Thumbnail.data);
3818         EFREE_IF(ImageInfo->encode_unicode);
3819         EFREE_IF(ImageInfo->decode_unicode_be);
3820         EFREE_IF(ImageInfo->decode_unicode_le);
3821         EFREE_IF(ImageInfo->encode_jis);
3822         EFREE_IF(ImageInfo->decode_jis_be);
3823         EFREE_IF(ImageInfo->decode_jis_le);
3824         EFREE_IF(ImageInfo->make);
3825         EFREE_IF(ImageInfo->model);
3826         for (i=0; i<ImageInfo->xp_fields.count; i++) {
3827                 EFREE_IF(ImageInfo->xp_fields.list[i].value);
3828         }
3829         EFREE_IF(ImageInfo->xp_fields.list);
3830         for (i=0; i<SECTION_COUNT; i++) {
3831                 exif_iif_free(ImageInfo, i);
3832         }
3833         exif_file_sections_free(ImageInfo);
3834         memset(ImageInfo, 0, sizeof(*ImageInfo));
3835         return TRUE;
3836 }
3837 /* }}} */
3838 
3839 /* {{{ exif_read_file
3840  */
3841 static int exif_read_file(image_info_type *ImageInfo, char *FileName, int read_thumbnail, int read_all)
3842 {
3843         int ret;
3844         zend_stat_t st;
3845         zend_string *base;
3846 
3847         /* Start with an empty image information structure. */
3848         memset(ImageInfo, 0, sizeof(*ImageInfo));
3849 
3850         ImageInfo->motorola_intel = -1; /* flag as unknown */
3851 
3852         ImageInfo->infile = php_stream_open_wrapper(FileName, "rb", STREAM_MUST_SEEK|IGNORE_PATH, NULL);
3853         if (!ImageInfo->infile) {
3854                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Unable to open file");
3855                 return FALSE;
3856         }
3857 
3858         if (php_stream_is(ImageInfo->infile, PHP_STREAM_IS_STDIO)) {
3859                 if (VCWD_STAT(FileName, &st) >= 0) {
3860                         if ((st.st_mode & S_IFMT) != S_IFREG) {
3861                                 exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Not a file");
3862                                 php_stream_close(ImageInfo->infile);
3863                                 return FALSE;
3864                         }
3865 
3866                         /* Store file date/time. */
3867                         ImageInfo->FileDateTime = st.st_mtime;
3868                         ImageInfo->FileSize = st.st_size;
3869                         /*exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Opened stream is file: %d", ImageInfo->FileSize);*/
3870                 }
3871         } else {
3872                 if (!ImageInfo->FileSize) {
3873                         php_stream_seek(ImageInfo->infile, 0, SEEK_END);
3874                         ImageInfo->FileSize = php_stream_tell(ImageInfo->infile);
3875                         php_stream_seek(ImageInfo->infile, 0, SEEK_SET);
3876                 }
3877         }
3878 
3879         base = php_basename(FileName, strlen(FileName), NULL, 0);
3880         ImageInfo->FileName          = estrndup(ZSTR_VAL(base), ZSTR_LEN(base));
3881         zend_string_release(base);
3882         ImageInfo->read_thumbnail = read_thumbnail;
3883         ImageInfo->read_all = read_all;
3884         ImageInfo->Thumbnail.filetype = IMAGE_FILETYPE_UNKNOWN;
3885 
3886         ImageInfo->encode_unicode    = estrdup(EXIF_G(encode_unicode));
3887         ImageInfo->decode_unicode_be = estrdup(EXIF_G(decode_unicode_be));
3888         ImageInfo->decode_unicode_le = estrdup(EXIF_G(decode_unicode_le));
3889         ImageInfo->encode_jis        = estrdup(EXIF_G(encode_jis));
3890         ImageInfo->decode_jis_be     = estrdup(EXIF_G(decode_jis_be));
3891         ImageInfo->decode_jis_le     = estrdup(EXIF_G(decode_jis_le));
3892 
3893 
3894         ImageInfo->ifd_nesting_level = 0;
3895 
3896         /* Scan the JPEG headers. */
3897         ret = exif_scan_FILE_header(ImageInfo);
3898 
3899         php_stream_close(ImageInfo->infile);
3900         return ret;
3901 }
3902 /* }}} */
3903 
3904 /* {{{ proto array exif_read_data(string filename [, string sections_needed [, bool sub_arrays[, bool read_thumbnail]]])
3905    Reads header data from the JPEG/TIFF image filename and optionally reads the internal thumbnails */
3906 PHP_FUNCTION(exif_read_data)
3907 {
3908         char *p_name, *p_sections_needed = NULL;
3909         size_t p_name_len, p_sections_needed_len = 0;
3910         zend_bool sub_arrays=0, read_thumbnail=0, read_all=0;
3911 
3912         int i, ret, sections_needed=0;
3913         image_info_type ImageInfo;
3914         char tmp[64], *sections_str, *s;
3915 
3916         if (zend_parse_parameters(ZEND_NUM_ARGS(), "p|sbb", &p_name, &p_name_len, &p_sections_needed, &p_sections_needed_len, &sub_arrays, &read_thumbnail) == FAILURE) {
3917                 return;
3918         }
3919 
3920         memset(&ImageInfo, 0, sizeof(ImageInfo));
3921 
3922         if (p_sections_needed) {
3923                 spprintf(&sections_str, 0, ",%s,", p_sections_needed);
3924                 /* sections_str DOES start with , and SPACES are NOT allowed in names */
3925                 s = sections_str;
3926                 while (*++s) {
3927                         if (*s == ' ') {
3928                                 *s = ',';
3929                         }
3930                 }
3931 
3932                 for (i = 0; i < SECTION_COUNT; i++) {
3933                         snprintf(tmp, sizeof(tmp), ",%s,", exif_get_sectionname(i));
3934                         if (strstr(sections_str, tmp)) {
3935                                 sections_needed |= 1<<i;
3936                         }
3937                 }
3938                 EFREE_IF(sections_str);
3939                 /* now see what we need */
3940 #ifdef EXIF_DEBUG
3941                 sections_str = exif_get_sectionlist(sections_needed);
3942                 if (!sections_str) {
3943                         RETURN_FALSE;
3944                 }
3945                 exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Sections needed: %s", sections_str[0] ? sections_str : "None");
3946                 EFREE_IF(sections_str);
3947 #endif
3948         }
3949 
3950         ret = exif_read_file(&ImageInfo, p_name, read_thumbnail, read_all);
3951         sections_str = exif_get_sectionlist(ImageInfo.sections_found);
3952 
3953 #ifdef EXIF_DEBUG
3954         if (sections_str)
3955                 exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Sections found: %s", sections_str[0] ? sections_str : "None");
3956 #endif
3957 
3958         ImageInfo.sections_found |= FOUND_COMPUTED|FOUND_FILE;/* do not inform about in debug*/
3959 
3960         if (ret == FALSE || (sections_needed && !(sections_needed&ImageInfo.sections_found))) {
3961                 /* array_init must be checked at last! otherwise the array must be freed if a later test fails. */
3962                 exif_discard_imageinfo(&ImageInfo);
3963                 EFREE_IF(sections_str);
3964                 RETURN_FALSE;
3965         }
3966 
3967         array_init(return_value);
3968 
3969 #ifdef EXIF_DEBUG
3970         exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Generate section FILE");
3971 #endif
3972 
3973         /* now we can add our information */
3974         exif_iif_add_str(&ImageInfo, SECTION_FILE, "FileName",      ImageInfo.FileName);
3975         exif_iif_add_int(&ImageInfo, SECTION_FILE, "FileDateTime",  ImageInfo.FileDateTime);
3976         exif_iif_add_int(&ImageInfo, SECTION_FILE, "FileSize",      ImageInfo.FileSize);
3977         exif_iif_add_int(&ImageInfo, SECTION_FILE, "FileType",      ImageInfo.FileType);
3978         exif_iif_add_str(&ImageInfo, SECTION_FILE, "MimeType",      (char*)php_image_type_to_mime_type(ImageInfo.FileType));
3979         exif_iif_add_str(&ImageInfo, SECTION_FILE, "SectionsFound", sections_str ? sections_str : "NONE");
3980 
3981 #ifdef EXIF_DEBUG
3982         exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Generate section COMPUTED");
3983 #endif
3984 
3985         if (ImageInfo.Width>0 &&  ImageInfo.Height>0) {
3986                 exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "html"   , "width=\"%d\" height=\"%d\"", ImageInfo.Width, ImageInfo.Height);
3987                 exif_iif_add_int(&ImageInfo, SECTION_COMPUTED, "Height", ImageInfo.Height);
3988                 exif_iif_add_int(&ImageInfo, SECTION_COMPUTED, "Width",  ImageInfo.Width);
3989         }
3990         exif_iif_add_int(&ImageInfo, SECTION_COMPUTED, "IsColor", ImageInfo.IsColor);
3991         if (ImageInfo.motorola_intel != -1) {
3992                 exif_iif_add_int(&ImageInfo, SECTION_COMPUTED, "ByteOrderMotorola", ImageInfo.motorola_intel);
3993         }
3994         if (ImageInfo.FocalLength) {
3995                 exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "FocalLength", "%4.1Fmm", ImageInfo.FocalLength);
3996                 if(ImageInfo.CCDWidth) {
3997                         exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "35mmFocalLength", "%dmm", (int)(ImageInfo.FocalLength/ImageInfo.CCDWidth*35+0.5));
3998                 }
3999         }
4000         if(ImageInfo.CCDWidth) {
4001                 exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "CCDWidth", "%dmm", (int)ImageInfo.CCDWidth);
4002         }
4003         if(ImageInfo.ExposureTime>0) {
4004                 if(ImageInfo.ExposureTime <= 0.5) {
4005                         exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "ExposureTime", "%0.3F s (1/%d)", ImageInfo.ExposureTime, (int)(0.5 + 1/ImageInfo.ExposureTime));
4006                 } else {
4007                         exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "ExposureTime", "%0.3F s", ImageInfo.ExposureTime);
4008                 }
4009         }
4010         if(ImageInfo.ApertureFNumber) {
4011                 exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "ApertureFNumber", "f/%.1F", ImageInfo.ApertureFNumber);
4012         }
4013         if(ImageInfo.Distance) {
4014                 if(ImageInfo.Distance<0) {
4015                         exif_iif_add_str(&ImageInfo, SECTION_COMPUTED, "FocusDistance", "Infinite");
4016                 } else {
4017                         exif_iif_add_fmt(&ImageInfo, SECTION_COMPUTED, "FocusDistance", "%0.2Fm", ImageInfo.Distance);
4018                 }
4019         }
4020         if (ImageInfo.UserComment) {
4021                 exif_iif_add_buffer(&ImageInfo, SECTION_COMPUTED, "UserComment", ImageInfo.UserCommentLength, ImageInfo.UserComment);
4022                 if (ImageInfo.UserCommentEncoding && strlen(ImageInfo.UserCommentEncoding)) {
4023                         exif_iif_add_str(&ImageInfo, SECTION_COMPUTED, "UserCommentEncoding", ImageInfo.UserCommentEncoding);
4024                 }
4025         }
4026 
4027         exif_iif_add_str(&ImageInfo, SECTION_COMPUTED, "Copyright",              ImageInfo.Copyright);
4028         exif_iif_add_str(&ImageInfo, SECTION_COMPUTED, "Copyright.Photographer", ImageInfo.CopyrightPhotographer);
4029         exif_iif_add_str(&ImageInfo, SECTION_COMPUTED, "Copyright.Editor",       ImageInfo.CopyrightEditor);
4030 
4031         for (i=0; i<ImageInfo.xp_fields.count; i++) {
4032                 exif_iif_add_str(&ImageInfo, SECTION_WINXP, exif_get_tagname(ImageInfo.xp_fields.list[i].tag, NULL, 0, exif_get_tag_table(SECTION_WINXP)), ImageInfo.xp_fields.list[i].value);
4033         }
4034         if (ImageInfo.Thumbnail.size) {
4035                 if (read_thumbnail) {
4036                         /* not exif_iif_add_str : this is a buffer */
4037                         exif_iif_add_tag(&ImageInfo, SECTION_THUMBNAIL, "THUMBNAIL", TAG_NONE, TAG_FMT_UNDEFINED, ImageInfo.Thumbnail.size, ImageInfo.Thumbnail.data);
4038                 }
4039                 if (!ImageInfo.Thumbnail.width || !ImageInfo.Thumbnail.height) {
4040                         /* try to evaluate if thumbnail data is present */
4041                         exif_scan_thumbnail(&ImageInfo);
4042                 }
4043                 exif_iif_add_int(&ImageInfo, SECTION_COMPUTED, "Thumbnail.FileType", ImageInfo.Thumbnail.filetype);
4044                 exif_iif_add_str(&ImageInfo, SECTION_COMPUTED, "Thumbnail.MimeType", (char*)php_image_type_to_mime_type(ImageInfo.Thumbnail.filetype));
4045         }
4046         if (ImageInfo.Thumbnail.width && ImageInfo.Thumbnail.height) {
4047                 exif_iif_add_int(&ImageInfo, SECTION_COMPUTED, "Thumbnail.Height", ImageInfo.Thumbnail.height);
4048                 exif_iif_add_int(&ImageInfo, SECTION_COMPUTED, "Thumbnail.Width",  ImageInfo.Thumbnail.width);
4049         }
4050         EFREE_IF(sections_str);
4051 
4052 #ifdef EXIF_DEBUG
4053         exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Adding image infos");
4054 #endif
4055 
4056         add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_FILE      );
4057         add_assoc_image_info(return_value, 1,          &ImageInfo, SECTION_COMPUTED  );
4058         add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_ANY_TAG   );
4059         add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_IFD0      );
4060         add_assoc_image_info(return_value, 1,          &ImageInfo, SECTION_THUMBNAIL );
4061         add_assoc_image_info(return_value, 1,          &ImageInfo, SECTION_COMMENT   );
4062         add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_EXIF      );
4063         add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_GPS       );
4064         add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_INTEROP   );
4065         add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_FPIX      );
4066         add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_APP12     );
4067         add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_WINXP     );
4068         add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_MAKERNOTE );
4069 
4070 #ifdef EXIF_DEBUG
4071         exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Discarding info");
4072 #endif
4073 
4074         exif_discard_imageinfo(&ImageInfo);
4075 
4076 #ifdef EXIF_DEBUG
4077         php_error_docref1(NULL, p_name, E_NOTICE, "done");
4078 #endif
4079 }
4080 /* }}} */
4081 
4082 /* {{{ proto string exif_thumbnail(string filename [, &width, &height [, &imagetype]])
4083    Reads the embedded thumbnail */
4084 PHP_FUNCTION(exif_thumbnail)
4085 {
4086         zval *p_width = 0, *p_height = 0, *p_imagetype = 0;
4087         char *p_name;
4088         size_t p_name_len;
4089         int ret, arg_c = ZEND_NUM_ARGS();
4090         image_info_type ImageInfo;
4091 
4092         memset(&ImageInfo, 0, sizeof(ImageInfo));
4093 
4094         if (arg_c!=1 && arg_c!=3 && arg_c!=4) {
4095                 WRONG_PARAM_COUNT;
4096         }
4097 
4098         if (zend_parse_parameters(arg_c, "p|z/z/z/", &p_name, &p_name_len, &p_width, &p_height, &p_imagetype) == FAILURE) {
4099                 return;
4100         }
4101 
4102         ret = exif_read_file(&ImageInfo, p_name, 1, 0);
4103         if (ret==FALSE) {
4104                 exif_discard_imageinfo(&ImageInfo);
4105                 RETURN_FALSE;
4106         }
4107 
4108 #ifdef EXIF_DEBUG
4109         exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Thumbnail data %d %d %d, %d x %d", ImageInfo.Thumbnail.data, ImageInfo.Thumbnail.size, ImageInfo.Thumbnail.filetype, ImageInfo.Thumbnail.width, ImageInfo.Thumbnail.height);
4110 #endif
4111         if (!ImageInfo.Thumbnail.data || !ImageInfo.Thumbnail.size) {
4112                 exif_discard_imageinfo(&ImageInfo);
4113                 RETURN_FALSE;
4114         }
4115 
4116 #ifdef EXIF_DEBUG
4117         exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Returning thumbnail(%d)", ImageInfo.Thumbnail.size);
4118 #endif
4119 
4120         ZVAL_STRINGL(return_value, ImageInfo.Thumbnail.data, ImageInfo.Thumbnail.size);
4121         if (arg_c >= 3) {
4122                 if (!ImageInfo.Thumbnail.width || !ImageInfo.Thumbnail.height) {
4123                         exif_scan_thumbnail(&ImageInfo);
4124                 }
4125                 zval_dtor(p_width);
4126                 zval_dtor(p_height);
4127                 ZVAL_LONG(p_width,  ImageInfo.Thumbnail.width);
4128                 ZVAL_LONG(p_height, ImageInfo.Thumbnail.height);
4129         }
4130         if (arg_c >= 4) {
4131                 zval_dtor(p_imagetype);
4132                 ZVAL_LONG(p_imagetype, ImageInfo.Thumbnail.filetype);
4133         }
4134 
4135 #ifdef EXIF_DEBUG
4136         exif_error_docref(NULL EXIFERR_CC, &ImageInfo, E_NOTICE, "Discarding info");
4137 #endif
4138 
4139         exif_discard_imageinfo(&ImageInfo);
4140 
4141 #ifdef EXIF_DEBUG
4142         php_error_docref1(NULL, p_name, E_NOTICE, "Done");
4143 #endif
4144 }
4145 /* }}} */
4146 
4147 /* {{{ proto int exif_imagetype(string imagefile)
4148    Get the type of an image */
4149 PHP_FUNCTION(exif_imagetype)
4150 {
4151         char *imagefile;
4152         size_t imagefile_len;
4153         php_stream * stream;
4154         int itype = 0;
4155 
4156         if (zend_parse_parameters(ZEND_NUM_ARGS(), "s", &imagefile, &imagefile_len) == FAILURE) {
4157                 return;
4158         }
4159 
4160         stream = php_stream_open_wrapper(imagefile, "rb", IGNORE_PATH|REPORT_ERRORS, NULL);
4161 
4162         if (stream == NULL) {
4163                 RETURN_FALSE;
4164         }
4165 
4166         itype = php_getimagetype(stream, NULL);
4167 
4168         php_stream_close(stream);
4169 
4170         if (itype == IMAGE_FILETYPE_UNKNOWN) {
4171                 RETURN_FALSE;
4172         } else {
4173                 ZVAL_LONG(return_value, itype);
4174         }
4175 }
4176 /* }}} */
4177 
4178 #endif
4179 
4180 /*
4181  * Local variables:
4182  * tab-width: 4
4183  * c-basic-offset: 4
4184  * End:
4185  * vim600: sw=4 ts=4 tw=78 fdm=marker
4186  * vim<600: sw=4 ts=4 tw=78
4187  */
/* [<][>][^][v][top][bottom][index][help] */
root/ext/exif/exif.c

DEFINITIONS
