mirror of
https://github.com/php/php-src.git
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67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
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/*
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+----------------------------------------------------------------------+
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| PHP Version 5 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2005 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.0 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_0.txt. |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Michael Wallner <mike@php.net> |
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| Sara Golemon <pollita@php.net> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "php_hash.h"
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#include "php_hash_adler32.h"
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PHP_HASH_API void PHP_ADLER32Init(PHP_ADLER32_CTX *context)
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{
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context->state = 1;
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}
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PHP_HASH_API void PHP_ADLER32Update(PHP_ADLER32_CTX *context, const unsigned char *input, size_t len)
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{
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php_hash_uint32 i, s[2] = { context->state & 0xffff, (context->state >> 16) & 0xffff };
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for (i = 0; i < len; ++i) {
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s[0] = (s[0] + input[i]) % 65521;
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s[1] = (s[1] + s[0]) % 65521;
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}
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context->state = s[0] + (s[1] << 16);
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}
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PHP_HASH_API void PHP_ADLER32Final(unsigned char digest[4], PHP_ADLER32_CTX *context)
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{
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digest[3] = (unsigned char) ((context->state >> 24) & 0xff);
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digest[2] = (unsigned char) ((context->state >> 16) & 0xff);
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digest[1] = (unsigned char) ((context->state >> 8) & 0xff);
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digest[0] = (unsigned char) (context->state & 0xff);
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context->state = 0;
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}
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php_hash_ops php_hash_adler32_ops = {
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(php_hash_init_func_t) PHP_ADLER32Init,
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(php_hash_update_func_t) PHP_ADLER32Update,
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(php_hash_final_func_t) PHP_ADLER32Final,
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4, /* what to say here? */
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4,
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sizeof(PHP_ADLER32_CTX)
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};
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: sw=4 ts=4 fdm=marker
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* vim<600: sw=4 ts=4
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*/
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