mirror of
https://github.com/php/php-src.git
synced 2025-01-07 19:44:02 +08:00
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| PHP Version 7 |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) 1997-2018 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;
|
|
uint32_t crcinit = 0;
|
|
register uint32_t crc;
|
|
|
|
ZEND_PARSE_PARAMETERS_START(1, 1)
|
|
Z_PARAM_STRING(p, nr)
|
|
ZEND_PARSE_PARAMETERS_END();
|
|
|
|
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
|
|
*/
|