php-src/ext/standard/iptc.c
Stig Bakken 257de2bade First commit of re-structuring phase one. We have started using automake in
sub-directories and started to move extension code into ext/<name>.  For now,
I have moved the "standard" extension (which is quite a mix of everything
right now) and the GD extension into their own subdirs in ext/.
The configure script now also runs configure in the libzend directory
automatically and makes sure php4 and libzend use the same config.cache file.
To avoid running configure in libzend, use the --no-recursion option.
"make" in php4 also builds libzend now.
The Apache module doesn't compile right now, but a fix for that is
coming up.
1999-04-17 00:37:12 +00:00

133 lines
4.3 KiB
C

/*
+----------------------------------------------------------------------+
| PHP HTML Embedded Scripting Language Version 3.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997,1998 PHP Development Team (See Credits file) |
+----------------------------------------------------------------------+
| This program is free software; you can redistribute it and/or modify |
| it under the terms of one of the following licenses: |
| |
| A) the GNU General Public License as published by the Free Software |
| Foundation; either version 2 of the License, or (at your option) |
| any later version. |
| |
| B) the PHP License as published by the PHP Development Team and |
| included in the distribution in the file: LICENSE |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of both licenses referred to here. |
| If you did not, or have any questions about PHP licensing, please |
| contact core@php.net. |
+----------------------------------------------------------------------+
| Authors: Thies C. Arntzen (thies@digicol.de) |
+----------------------------------------------------------------------+
*/
/* $Id$ */
/*
* Functions to parse & compse IPTC data.
* PhotoShop >= 3.0 can read and write textual data to JPEG files.
* ... more to come .....
*/
/*
* TODO:
* - add IPTC translation table
* - implement a call to embed iptc into a JPEG file
*/
#include "php.h"
#include "php3_iptc.h"
void php3_iptcparse(INTERNAL_FUNCTION_PARAMETERS)
{
unsigned int length, inx, len, inheader, tagsfound;
unsigned char *buffer;
unsigned char recnum, dataset;
unsigned char key[ 16 ];
pval values, *str, *element;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &str) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
inx = 0;
length = str->value.str.len;
buffer = str->value.str.val;
inheader = 0; /* have we already found the IPTC-Header??? */
tagsfound = 0; /* number of tags already found */
while (inx < length) {
if (buffer[ inx++ ] != 0x1c) { /* skip all junk */
if (inheader) {
break; /* we ran against some data which does not conform to IPTC - stop parsing! */
} else {
continue;
}
} else {
inheader = 1;
}
if ((inx + 4) >= length)
break;
dataset = buffer[ inx++ ];
recnum = buffer[ inx++ ];
if (buffer[ inx ] & (unsigned char) 0x80) {
len = (((long) buffer[ inx + 2 ]) << 24) + (((long) buffer[ inx + 3 ]) << 16) +
(((long) buffer[ inx + 4 ]) << 8) + (((long) buffer[ inx + 5 ]));
inx += 6;
} else {
len = (((unsigned short) buffer[ inx ])<<8) | (unsigned short)buffer[ inx+1 ];
inx += 2;
}
sprintf(key,"%d#%03d",(unsigned int) dataset,(unsigned int) recnum);
if ((inx + len) > length)
break;
if (tagsfound == 0) { /* found the 1st tag - initialize the return array */
if (array_init(return_value) == FAILURE) {
php3_error(E_ERROR, "Unable to initialize array");
RETURN_FALSE;
}
}
if (_php3_hash_find(return_value->value.ht,key,strlen(key) + 1,(void **) &element) == FAILURE) {
if (array_init(&values) == FAILURE) {
php3_error(E_ERROR, "Unable to initialize array");
RETURN_FALSE;
}
_php3_hash_update(return_value->value.ht, key, strlen(key)+1, (void *) &values, sizeof(pval), (void **) &element);
}
add_next_index_stringl(element,buffer+inx,len,1);
inx += len;
tagsfound++;
}
if (! tagsfound) {
RETURN_FALSE;
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/