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LCOV - code coverage report
Current view: top level - ext/standard - iptc.c (source / functions) Hit Total Coverage
Test: PHP Code Coverage Lines: 98 135 72.6 %
Date: 2015-09-02 Functions: 7 7 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*
       2             :    +----------------------------------------------------------------------+
       3             :    | PHP Version 7                                                        |
       4             :    +----------------------------------------------------------------------+
       5             :    | Copyright (c) 1997-2015 The PHP Group                                |
       6             :    +----------------------------------------------------------------------+
       7             :    | This source file is subject to version 3.01 of the PHP license,      |
       8             :    | that is bundled with this package in the file LICENSE, and is        |
       9             :    | available through the world-wide-web at the following url:           |
      10             :    | http://www.php.net/license/3_01.txt                                  |
      11             :    | If you did not receive a copy of the PHP license and are unable to   |
      12             :    | obtain it through the world-wide-web, please send a note to          |
      13             :    | license@php.net so we can mail you a copy immediately.               |
      14             :    +----------------------------------------------------------------------+
      15             :    | Author: Thies C. Arntzen <thies@thieso.net>                          |
      16             :    +----------------------------------------------------------------------+
      17             :  */
      18             : 
      19             : /* $Id$ */
      20             : 
      21             : /*
      22             :  * Functions to parse & compse IPTC data.
      23             :  * PhotoShop >= 3.0 can read and write textual data to JPEG files.
      24             :  * ... more to come .....
      25             :  *
      26             :  * i know, parts of this is now duplicated in image.c
      27             :  * but in this case i think it's okay!
      28             :  */
      29             : 
      30             : /*
      31             :  * TODO:
      32             :  *  - add IPTC translation table
      33             :  */
      34             : 
      35             : #include "php.h"
      36             : #include "php_iptc.h"
      37             : #include "ext/standard/head.h"
      38             : 
      39             : #include <sys/stat.h>
      40             : 
      41             : 
      42             : /* some defines for the different JPEG block types */
      43             : #define M_SOF0  0xC0            /* Start Of Frame N */
      44             : #define M_SOF1  0xC1            /* N indicates which compression process */
      45             : #define M_SOF2  0xC2            /* Only SOF0-SOF2 are now in common use */
      46             : #define M_SOF3  0xC3
      47             : #define M_SOF5  0xC5            /* NB: codes C4 and CC are NOT SOF markers */
      48             : #define M_SOF6  0xC6
      49             : #define M_SOF7  0xC7
      50             : #define M_SOF9  0xC9
      51             : #define M_SOF10 0xCA
      52             : #define M_SOF11 0xCB
      53             : #define M_SOF13 0xCD
      54             : #define M_SOF14 0xCE
      55             : #define M_SOF15 0xCF
      56             : #define M_SOI   0xD8
      57             : #define M_EOI   0xD9            /* End Of Image (end of datastream) */
      58             : #define M_SOS   0xDA            /* Start Of Scan (begins compressed data) */
      59             : #define M_APP0  0xe0
      60             : #define M_APP1  0xe1
      61             : #define M_APP2  0xe2
      62             : #define M_APP3  0xe3
      63             : #define M_APP4  0xe4
      64             : #define M_APP5  0xe5
      65             : #define M_APP6  0xe6
      66             : #define M_APP7  0xe7
      67             : #define M_APP8  0xe8
      68             : #define M_APP9  0xe9
      69             : #define M_APP10 0xea
      70             : #define M_APP11 0xeb
      71             : #define M_APP12 0xec
      72             : #define M_APP13 0xed
      73             : #define M_APP14 0xee
      74             : #define M_APP15 0xef
      75             : 
      76             : /* {{{ php_iptc_put1
      77             :  */
      78         179 : static int php_iptc_put1(FILE *fp, int spool, unsigned char c, unsigned char **spoolbuf)
      79             : {
      80         179 :         if (spool > 0)
      81           0 :                 PUTC(c);
      82             : 
      83         179 :         if (spoolbuf) *(*spoolbuf)++ = c;
      84             : 
      85         179 :         return c;
      86             : }
      87             : /* }}} */
      88             : 
      89             : /* {{{ php_iptc_get1
      90             :  */
      91        1476 : static int php_iptc_get1(FILE *fp, int spool, unsigned char **spoolbuf)
      92             : {
      93             :         int c;
      94             :         char cc;
      95             : 
      96        1476 :         c = getc(fp);
      97             : 
      98        1476 :         if (c == EOF) return EOF;
      99             : 
     100        1474 :         if (spool > 0) {
     101           0 :                 cc = c;
     102           0 :                 PUTC(cc);
     103             :         }
     104             : 
     105        1474 :         if (spoolbuf) *(*spoolbuf)++ = c;
     106             : 
     107        1474 :         return c;
     108             : }
     109             : /* }}} */
     110             : 
     111             : /* {{{ php_iptc_read_remaining
     112             :  */
     113           2 : static int php_iptc_read_remaining(FILE *fp, int spool, unsigned char **spoolbuf)
     114             : {
     115           2 :         while (php_iptc_get1(fp, spool, spoolbuf) != EOF) continue;
     116             : 
     117           2 :         return M_EOI;
     118             : }
     119             : /* }}} */
     120             : 
     121             : /* {{{ php_iptc_skip_variable
     122             :  */
     123          11 : static int php_iptc_skip_variable(FILE *fp, int spool, unsigned char **spoolbuf)
     124             : {
     125             :         unsigned int  length;
     126             :         int c1, c2;
     127             : 
     128          11 :     if ((c1 = php_iptc_get1(fp, spool, spoolbuf)) == EOF) return M_EOI;
     129             : 
     130          11 :     if ((c2 = php_iptc_get1(fp, spool, spoolbuf)) == EOF) return M_EOI;
     131             : 
     132          11 :         length = (((unsigned char) c1) << 8) + ((unsigned char) c2);
     133             : 
     134          11 :         length -= 2;
     135             : 
     136         751 :         while (length--)
     137         729 :                 if (php_iptc_get1(fp, spool, spoolbuf) == EOF) return M_EOI;
     138             : 
     139          11 :         return 0;
     140             : }
     141             : /* }}} */
     142             : 
     143             : /* {{{ php_iptc_next_marker
     144             :  */
     145          12 : static int php_iptc_next_marker(FILE *fp, int spool, unsigned char **spoolbuf)
     146             : {
     147             :     int c;
     148             : 
     149             :     /* skip unimportant stuff */
     150             : 
     151          12 :     c = php_iptc_get1(fp, spool, spoolbuf);
     152             : 
     153          12 :         if (c == EOF) return M_EOI;
     154             : 
     155          24 :     while (c != 0xff) {
     156           0 :         if ((c = php_iptc_get1(fp, spool, spoolbuf)) == EOF)
     157           0 :             return M_EOI; /* we hit EOF */
     158             :     }
     159             : 
     160             :     /* get marker byte, swallowing possible padding */
     161             :     do {
     162          12 :         c = php_iptc_get1(fp, 0, 0);
     163          12 :                 if (c == EOF)
     164           0 :             return M_EOI;       /* we hit EOF */
     165             :                 else
     166          12 :                 if (c == 0xff)
     167           0 :                         php_iptc_put1(fp, spool, (unsigned char)c, spoolbuf);
     168          12 :     } while (c == 0xff);
     169             : 
     170          12 :     return (unsigned int) c;
     171             : }
     172             : /* }}} */
     173             : 
     174             : static char psheader[] = "\xFF\xED\0\0Photoshop 3.0\08BIM\x04\x04\0\0\0\0";
     175             : 
     176             : /* {{{ proto array iptcembed(string iptcdata, string jpeg_file_name [, int spool])
     177             :    Embed binary IPTC data into a JPEG image. */
     178           3 : PHP_FUNCTION(iptcembed)
     179             : {
     180             :         char *iptcdata, *jpeg_file;
     181             :         size_t iptcdata_len, jpeg_file_len;
     182           3 :         zend_long spool = 0;
     183             :         FILE *fp;
     184           3 :         unsigned int marker, done = 0;
     185             :         int inx;
     186           3 :         zend_string *spoolbuf = NULL;
     187           3 :         unsigned char *poi = NULL;
     188             :         zend_stat_t sb;
     189           3 :         zend_bool written = 0;
     190             : 
     191           3 :         if (zend_parse_parameters(ZEND_NUM_ARGS(), "sp|l", &iptcdata, &iptcdata_len, &jpeg_file, &jpeg_file_len, &spool) != SUCCESS) {
     192           0 :                 return;
     193             :         }
     194             : 
     195           3 :         if (php_check_open_basedir(jpeg_file)) {
     196           0 :                 RETURN_FALSE;
     197             :         }
     198             : 
     199           3 :         if ((fp = VCWD_FOPEN(jpeg_file, "rb")) == 0) {
     200           0 :                 php_error_docref(NULL, E_WARNING, "Unable to open %s", jpeg_file);
     201           0 :                 RETURN_FALSE;
     202             :         }
     203             : 
     204           3 :         if (spool < 2) {
     205           3 :                 zend_fstat(fileno(fp), &sb);
     206             : 
     207           6 :                 spoolbuf = zend_string_alloc(iptcdata_len + sizeof(psheader) + sb.st_size + 1024, 0);
     208           3 :                 poi = (unsigned char*)ZSTR_VAL(spoolbuf);
     209           3 :                 memset(poi, 0, iptcdata_len + sizeof(psheader) + sb.st_size + 1024 + 1);
     210             :         }
     211             : 
     212           3 :         if (php_iptc_get1(fp, spool, poi?&poi:0) != 0xFF) {
     213           1 :                 fclose(fp);
     214           1 :                 if (spoolbuf) {
     215             :                         zend_string_free(spoolbuf);
     216             :                 }
     217           1 :                 RETURN_FALSE;
     218             :         }
     219             : 
     220           2 :         if (php_iptc_get1(fp, spool, poi?&poi:0) != 0xD8) {
     221           0 :                 fclose(fp);
     222           0 :                 if (spoolbuf) {
     223             :                         zend_string_free(spoolbuf);
     224             :                 }
     225           0 :                 RETURN_FALSE;
     226             :         }
     227             : 
     228          16 :         while (!done) {
     229          12 :                 marker = php_iptc_next_marker(fp, spool, poi?&poi:0);
     230             : 
     231          12 :                 if (marker == M_EOI) { /* EOF */
     232           0 :                         break;
     233          12 :                 } else if (marker != M_APP13) {
     234          11 :                         php_iptc_put1(fp, spool, (unsigned char)marker, poi?&poi:0);
     235             :                 }
     236             : 
     237          12 :                 switch (marker) {
     238             :                         case M_APP13:
     239             :                                 /* we are going to write a new APP13 marker, so don't output the old one */
     240           1 :                                 php_iptc_skip_variable(fp, 0, 0);
     241           1 :                                 fgetc(fp); /* skip already copied 0xFF byte */
     242           1 :                                 php_iptc_read_remaining(fp, spool, poi?&poi:0);
     243           1 :                                 done = 1;
     244           1 :                                 break;
     245             : 
     246             :                         case M_APP0:
     247             :                                 /* APP0 is in each and every JPEG, so when we hit APP0 we insert our new APP13! */
     248             :                         case M_APP1:
     249           2 :                                 if (written) {
     250             :                                         /* don't try to write the data twice */
     251           0 :                                         break;
     252             :                                 }
     253           2 :                                 written = 1;
     254             : 
     255           2 :                                 php_iptc_skip_variable(fp, spool, poi?&poi:0);
     256             : 
     257           2 :                                 if (iptcdata_len & 1) {
     258           0 :                                         iptcdata_len++; /* make the length even */
     259             :                                 }
     260             : 
     261           2 :                                 psheader[ 2 ] = (iptcdata_len+28)>>8;
     262           2 :                                 psheader[ 3 ] = (iptcdata_len+28)&0xff;
     263             : 
     264          58 :                                 for (inx = 0; inx < 28; inx++) {
     265          56 :                                         php_iptc_put1(fp, spool, psheader[inx], poi?&poi:0);
     266             :                                 }
     267             : 
     268           2 :                                 php_iptc_put1(fp, spool, (unsigned char)(iptcdata_len>>8), poi?&poi:0);
     269           2 :                                 php_iptc_put1(fp, spool, (unsigned char)(iptcdata_len&0xff), poi?&poi:0);
     270             : 
     271         110 :                                 for (inx = 0; inx < iptcdata_len; inx++) {
     272         108 :                                         php_iptc_put1(fp, spool, iptcdata[inx], poi?&poi:0);
     273             :                                 }
     274           2 :                                 break;
     275             : 
     276             :                         case M_SOS:
     277             :                                 /* we hit data, no more marker-inserting can be done! */
     278           1 :                                 php_iptc_read_remaining(fp, spool, poi?&poi:0);
     279           1 :                                 done = 1;
     280           1 :                                 break;
     281             : 
     282             :                         default:
     283           8 :                                 php_iptc_skip_variable(fp, spool, poi?&poi:0);
     284             :                                 break;
     285             :                 }
     286             :         }
     287             : 
     288           2 :         fclose(fp);
     289             : 
     290           2 :         if (spool < 2) {
     291           4 :                 spoolbuf = zend_string_truncate(spoolbuf, poi - (unsigned char*)ZSTR_VAL(spoolbuf), 0);
     292           2 :                 RETURN_NEW_STR(spoolbuf);
     293             :         } else {
     294           0 :                 RETURN_TRUE;
     295             :         }
     296             : }
     297             : /* }}} */
     298             : 
     299             : /* {{{ proto array iptcparse(string iptcdata)
     300             :    Parse binary IPTC-data into associative array */
     301           1 : PHP_FUNCTION(iptcparse)
     302             : {
     303           1 :         int inx = 0, len;
     304           1 :         unsigned int tagsfound = 0;
     305             :         unsigned char *buffer, recnum, dataset;
     306             :         char *str, key[16];
     307             :         size_t str_len;
     308             :         zval values, *element;
     309             : 
     310           1 :         if (zend_parse_parameters(ZEND_NUM_ARGS(), "s", &str, &str_len) != SUCCESS) {
     311           0 :                 return;
     312             :         }
     313             : 
     314           1 :         buffer = (unsigned char *)str;
     315             : 
     316           2 :         while (inx < str_len) { /* find 1st tag */
     317           1 :                 if ((buffer[inx] == 0x1c) && ((buffer[inx+1] == 0x01) || (buffer[inx+1] == 0x02))){
     318             :                         break;
     319             :                 } else {
     320           0 :                         inx++;
     321             :                 }
     322             :         }
     323             : 
     324           2 :         while (inx < str_len) {
     325           1 :                 if (buffer[ inx++ ] != 0x1c) {
     326           0 :                         break;   /* we ran against some data which does not conform to IPTC - stop parsing! */
     327             :                 }
     328             : 
     329           1 :                 if ((inx + 4) >= str_len)
     330           0 :                         break;
     331             : 
     332           1 :                 dataset = buffer[ inx++ ];
     333           1 :                 recnum = buffer[ inx++ ];
     334             : 
     335           1 :                 if (buffer[ inx ] & (unsigned char) 0x80) { /* long tag */
     336           1 :                         if((inx+6) >= str_len) {
     337           1 :                                 break;
     338             :                         }
     339           0 :                         len = (((zend_long) buffer[ inx + 2 ]) << 24) + (((zend_long) buffer[ inx + 3 ]) << 16) +
     340           0 :                                   (((zend_long) buffer[ inx + 4 ]) <<  8) + (((zend_long) buffer[ inx + 5 ]));
     341           0 :                         inx += 6;
     342             :                 } else { /* short tag */
     343           0 :                         len = (((unsigned short) buffer[ inx ])<<8) | (unsigned short)buffer[ inx+1 ];
     344           0 :                         inx += 2;
     345             :                 }
     346             : 
     347           0 :                 if ((len < 0) || (len > str_len) || (inx + len) > str_len) {
     348             :                         break;
     349             :                 }
     350             : 
     351           0 :                 snprintf(key, sizeof(key), "%d#%03d", (unsigned int) dataset, (unsigned int) recnum);
     352             : 
     353           0 :                 if (tagsfound == 0) { /* found the 1st tag - initialize the return array */
     354           0 :                         array_init(return_value);
     355             :                 }
     356             : 
     357           0 :                 if ((element = zend_hash_str_find(Z_ARRVAL_P(return_value), key, strlen(key))) == NULL) {
     358           0 :                         array_init(&values);
     359             : 
     360           0 :                         element = zend_hash_str_update(Z_ARRVAL_P(return_value), key, strlen(key), &values);
     361             :                 }
     362             : 
     363           0 :                 add_next_index_stringl(element, (char *) buffer+inx, len);
     364           0 :                 inx += len;
     365           0 :                 tagsfound++;
     366             :         }
     367             : 
     368           1 :         if (! tagsfound) {
     369           1 :                 RETURN_FALSE;
     370             :         }
     371             : }
     372             : /* }}} */
     373             : 
     374             : /*
     375             :  * Local variables:
     376             :  * tab-width: 4
     377             :  * c-basic-offset: 4
     378             :  * End:
     379             :  * vim600: sw=4 ts=4 fdm=marker
     380             :  * vim<600: sw=4 ts=4
     381             :  */

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Generated at Wed, 02 Sep 2015 17:19:19 +0000 (34 hours ago)

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