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/* +----------------------------------------------------------------------+ | PHP Version 5 | +----------------------------------------------------------------------+ | Copyright (c) 1997-2016 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; int len, nr; php_uint32 crcinit = 0; register php_uint32 crc; if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &p, &nr) == FAILURE) { return; } crc = crcinit^0xFFFFFFFF; for (len =+nr; 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 */