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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2017 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.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: Rasmus Lerdorf <rasmus@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#include "basic_functions.h"
#include "crc32.h"
/* {{{ proto string crc32(string str)
Calculate the crc32 polynomial of a string */
PHP_NAMED_FUNCTION(php_if_crc32)
{
char *p;
size_t nr;
php_uint32 crcinit = 0;
register php_uint32 crc;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "s", &p, &nr) == FAILURE) {
return;
}
crc = crcinit^0xFFFFFFFF;
for (; nr--; ++p) {
crc = ((crc >> 8) & 0x00FFFFFF) ^ crc32tab[(crc ^ (*p)) & 0xFF ];
}
RETVAL_LONG(crc^0xFFFFFFFF);
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
|
