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php-src/ext/standard/iptc.c
Sascha Schumann 74b09cbcf8 c set but unused
2002-05-04 17:41:51 +00:00

394 lines
9.9 KiB
C
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/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2002 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Thies C. Arntzen <thies@thieso.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
/*
* Functions to parse & compse IPTC data.
* PhotoShop >= 3.0 can read and write textual data to JPEG files.
* ... more to come .....
*
* i know, parts of this is now duplicated in image.c
* but in this case i think it's okay!
*/
/*
* TODO:
* - add IPTC translation table
*/
#include "php.h"
#include "php_iptc.h"
#include "ext/standard/head.h"
#include <sys/stat.h>
/* some defines for the different JPEG block types */
#define M_SOF0 0xC0 /* Start Of Frame N */
#define M_SOF1 0xC1 /* N indicates which compression process */
#define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */
#define M_SOF3 0xC3
#define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */
#define M_SOF6 0xC6
#define M_SOF7 0xC7
#define M_SOF9 0xC9
#define M_SOF10 0xCA
#define M_SOF11 0xCB
#define M_SOF13 0xCD
#define M_SOF14 0xCE
#define M_SOF15 0xCF
#define M_SOI 0xD8
#define M_EOI 0xD9 /* End Of Image (end of datastream) */
#define M_SOS 0xDA /* Start Of Scan (begins compressed data) */
#define M_APP0 0xe0
#define M_APP1 0xe1
#define M_APP2 0xe2
#define M_APP3 0xe3
#define M_APP4 0xe4
#define M_APP5 0xe5
#define M_APP6 0xe6
#define M_APP7 0xe7
#define M_APP8 0xe8
#define M_APP9 0xe9
#define M_APP10 0xea
#define M_APP11 0xeb
#define M_APP12 0xec
#define M_APP13 0xed
#define M_APP14 0xee
#define M_APP15 0xef
/* {{{ php_iptc_put1
*/
static int php_iptc_put1(FILE *fp, int spool, unsigned char c, unsigned char **spoolbuf TSRMLS_DC)
{
if (spool > 0)
PUTC(c);
if (spoolbuf) *(*spoolbuf)++ = c;
return c;
}
/* }}} */
/* {{{ php_iptc_get1
*/
static int php_iptc_get1(FILE *fp, int spool, unsigned char **spoolbuf TSRMLS_DC)
{
int c;
char cc;
c = getc(fp);
if (c == EOF) return EOF;
if (spool > 0) {
cc = c;
PUTC(cc);
}
if (spoolbuf) *(*spoolbuf)++ = c;
return c;
}
/* }}} */
/* {{{ php_iptc_read_remaining
*/
static int php_iptc_read_remaining(FILE *fp, int spool, unsigned char **spoolbuf TSRMLS_DC)
{
while (php_iptc_get1(fp, spool, spoolbuf TSRMLS_CC) != EOF) continue;
return M_EOI;
}
/* }}} */
/* {{{ php_iptc_skip_variable
*/
static int php_iptc_skip_variable(FILE *fp, int spool, unsigned char **spoolbuf TSRMLS_DC)
{
unsigned int length;
int c1, c2;
if ((c1 = php_iptc_get1(fp, spool, spoolbuf TSRMLS_CC)) == EOF) return M_EOI;
if ((c2 = php_iptc_get1(fp, spool, spoolbuf TSRMLS_CC)) == EOF) return M_EOI;
length = (((unsigned char) c1) << 8) + ((unsigned char) c2);
length -= 2;
while (length--)
if (php_iptc_get1(fp, spool, spoolbuf TSRMLS_CC) == EOF) return M_EOI;
return 0;
}
/* }}} */
/* {{{ php_iptc_next_marker
*/
static int php_iptc_next_marker(FILE *fp, int spool, unsigned char **spoolbuf TSRMLS_DC)
{
int c;
/* skip unimportant stuff */
c = php_iptc_get1(fp, spool, spoolbuf TSRMLS_CC);
if (c == EOF) return M_EOI;
while (c != 0xff) {
if ((c = php_iptc_get1(fp, spool, spoolbuf TSRMLS_CC)) == EOF)
return M_EOI; /* we hit EOF */
}
/* get marker byte, swallowing possible padding */
do {
c = php_iptc_get1(fp, 0, 0 TSRMLS_CC);
if (c == EOF)
return M_EOI; /* we hit EOF */
else
if (c == 0xff)
php_iptc_put1(fp, spool, (unsigned char)c, spoolbuf TSRMLS_CC);
} while (c == 0xff);
return (unsigned int) c;
}
/* }}} */
static char psheader[] = "\xFF\xED\0\0Photoshop 3.0\08BIM\x04\x04\0\0\0\0";
/* {{{ proto array iptcembed(string iptcdata, string jpeg_file_name [, int spool])
Embed binary IPTC data into a JPEG image. */
PHP_FUNCTION(iptcembed)
{
zval **iptcdata, **jpeg_file, **spool_flag;
FILE *fp;
unsigned int marker;
unsigned int spool = 0, done = 0, inx, len;
unsigned char *spoolbuf=0, *poi=0;
struct stat sb;
switch(ZEND_NUM_ARGS()){
case 3:
if (zend_get_parameters_ex(3, &iptcdata, &jpeg_file, &spool_flag) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(iptcdata);
convert_to_string_ex(jpeg_file);
convert_to_long_ex(spool_flag);
spool = Z_LVAL_PP(spool_flag);
break;
case 2:
if (zend_get_parameters_ex(2, &iptcdata, &jpeg_file) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(iptcdata);
convert_to_string_ex(jpeg_file);
break;
default:
WRONG_PARAM_COUNT;
break;
}
if (php_check_open_basedir(Z_STRVAL_PP(jpeg_file) TSRMLS_CC)) {
RETURN_FALSE;
}
if ((fp = VCWD_FOPEN(Z_STRVAL_PP(jpeg_file), "rb")) == 0) {
php_error(E_WARNING, "Unable to open %s", Z_STRVAL_PP(jpeg_file));
RETURN_FALSE;
}
len = Z_STRLEN_PP(iptcdata);
if (spool < 2) {
fstat(fileno(fp), &sb);
poi = spoolbuf = emalloc(len + sizeof(psheader) + sb.st_size + 1024);
if (! spoolbuf) {
fclose(fp);
RETURN_FALSE;
}
}
if (php_iptc_get1(fp, spool, poi?&poi:0 TSRMLS_CC) != 0xFF) {
fclose(fp);
RETURN_FALSE;
}
if (php_iptc_get1(fp, spool, poi?&poi:0 TSRMLS_CC) != 0xD8) {
fclose(fp);
RETURN_FALSE;
}
while (!done) {
marker = php_iptc_next_marker(fp, spool, poi?&poi:0 TSRMLS_CC);
if (marker == M_EOI) { /* EOF */
break;
} else if (marker != M_APP13) {
php_iptc_put1(fp, spool, (unsigned char)marker, poi?&poi:0 TSRMLS_CC);
}
switch (marker) {
case M_APP13:
/* we are going to write a new APP13 marker, so don't output the old one */
php_iptc_skip_variable(fp, 0, 0 TSRMLS_CC);
php_iptc_read_remaining(fp, spool, poi?&poi:0 TSRMLS_CC);
done = 1;
break;
case M_APP0:
/* APP0 is in each and every JPEG, so when we hit APP0 we insert our new APP13! */
php_iptc_skip_variable(fp, spool, poi?&poi:0 TSRMLS_CC);
if (len & 1) len++; /* make the length even */
psheader[ 2 ] = (len+28)>>8;
psheader[ 3 ] = (len+28)&0xff;
for (inx = 0; inx < 28; inx++)
php_iptc_put1(fp, spool, psheader[inx], poi?&poi:0 TSRMLS_CC);
php_iptc_put1(fp, spool, (unsigned char)(len>>8), poi?&poi:0 TSRMLS_CC);
php_iptc_put1(fp, spool, (unsigned char)(len&0xff), poi?&poi:0 TSRMLS_CC);
for (inx = 0; inx < len; inx++)
php_iptc_put1(fp, spool, Z_STRVAL_PP(iptcdata)[inx], poi?&poi:0 TSRMLS_CC);
break;
case M_SOS:
/* we hit data, no more marker-inserting can be done! */
php_iptc_read_remaining(fp, spool, poi?&poi:0 TSRMLS_CC);
done = 1;
break;
default:
php_iptc_skip_variable(fp, spool, poi?&poi:0 TSRMLS_CC);
break;
}
}
fclose(fp);
if (spool < 2) {
RETVAL_STRINGL(spoolbuf, poi - spoolbuf, 0);
} else {
RETURN_TRUE;
}
}
/* }}} */
/* {{{ proto array iptcparse(string iptcdata)
Parse binary IPTC-data into associative array */
PHP_FUNCTION(iptcparse)
{
unsigned int length, inx, len, tagsfound;
unsigned char *buffer;
unsigned char recnum, dataset;
unsigned char key[ 16 ];
zval *values, **str, **element;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &str) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(str);
inx = 0;
length = Z_STRLEN_PP(str);
buffer = Z_STRVAL_PP(str);
tagsfound = 0; /* number of tags already found */
while (inx < length) { /* find 1st tag */
if ((buffer[inx] == 0x1c) && (buffer[inx+1] == 0x02)){
break;
} else {
inx++;
}
}
while (inx < length) {
if (buffer[ inx++ ] != 0x1c) {
break; /* we ran against some data which does not conform to IPTC - stop parsing! */
}
if ((inx + 4) >= length)
break;
dataset = buffer[ inx++ ];
recnum = buffer[ inx++ ];
if (buffer[ inx ] & (unsigned char) 0x80) { /* long tag */
len = (((long) buffer[ inx + 2 ]) << 24) + (((long) buffer[ inx + 3 ]) << 16) +
(((long) buffer[ inx + 4 ]) << 8) + (((long) buffer[ inx + 5 ]));
inx += 6;
} else { /* short tag */
len = (((unsigned short) buffer[ inx ])<<8) | (unsigned short)buffer[ inx+1 ];
inx += 2;
}
sprintf(key, "%d#%03d", (unsigned int) dataset, (unsigned int) recnum);
if ((len > length) || (inx + len) > length)
break;
if (tagsfound == 0) { /* found the 1st tag - initialize the return array */
if (array_init(return_value) == FAILURE) {
php_error(E_ERROR, "Unable to initialize array");
RETURN_FALSE;
}
}
if (zend_hash_find(Z_ARRVAL_P(return_value), key, strlen(key) + 1, (void **) &element) == FAILURE) {
ALLOC_ZVAL(values);
INIT_PZVAL(values);
if (array_init(values) == FAILURE) {
php_error(E_ERROR, "Unable to initialize array");
RETURN_FALSE;
}
zend_hash_update(Z_ARRVAL_P(return_value), 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:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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