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LCOV - code coverage report
Current view: top level - ext/hash - hash_adler32.c (source / functions) Hit Total Coverage
Test: PHP Code Coverage Lines: 24 26 92.3 %
Date: 2014-10-16 Functions: 4 4 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*
       2             :   +----------------------------------------------------------------------+
       3             :   | PHP Version 5                                                        |
       4             :   +----------------------------------------------------------------------+
       5             :   | Copyright (c) 1997-2014 The PHP Group                                |
       6             :   +----------------------------------------------------------------------+
       7             :   | This source file is subject to version 3.01 of the PHP license,      |
       8             :   | that is bundled with this package in the file LICENSE, and is        |
       9             :   | available through the world-wide-web at the following url:           |
      10             :   | http://www.php.net/license/3_01.txt                                  |
      11             :   | If you did not receive a copy of the PHP license and are unable to   |
      12             :   | obtain it through the world-wide-web, please send a note to          |
      13             :   | license@php.net so we can mail you a copy immediately.               |
      14             :   +----------------------------------------------------------------------+
      15             :   | Authors: Michael Wallner <mike@php.net>                              |
      16             :   |          Sara Golemon <pollita@php.net>                              |
      17             :   +----------------------------------------------------------------------+
      18             : */
      19             : 
      20             : /* $Id$ */
      21             : 
      22             : #include "php_hash.h"
      23             : #include "php_hash_adler32.h"
      24             : 
      25          25 : PHP_HASH_API void PHP_ADLER32Init(PHP_ADLER32_CTX *context)
      26             : {
      27          25 :         context->state = 1;
      28          25 : }
      29             : 
      30          32 : PHP_HASH_API void PHP_ADLER32Update(PHP_ADLER32_CTX *context, const unsigned char *input, size_t len)
      31             : {
      32             :         php_hash_uint32 i, s[2];
      33             :         
      34          32 :         s[0] = context->state & 0xffff;
      35          32 :         s[1] = (context->state >> 16) & 0xffff;
      36         933 :         for (i = 0; i < len; ++i) {
      37         901 :                 s[0] += input[i];
      38         901 :                 s[1] += s[0];
      39         901 :                 if (s[1]>=0x7fffffff)
      40             :                 {
      41           0 :                         s[0] = s[0] % 65521;
      42           0 :                         s[1] = s[1] % 65521;
      43             :                 }
      44             :         }
      45          32 :         s[0] = s[0] % 65521;
      46          32 :         s[1] = s[1] % 65521;
      47          32 :         context->state = s[0] + (s[1] << 16);
      48          32 : }
      49             : 
      50          25 : PHP_HASH_API void PHP_ADLER32Final(unsigned char digest[4], PHP_ADLER32_CTX *context)
      51             : {
      52          25 :         digest[0] = (unsigned char) ((context->state >> 24) & 0xff);
      53          25 :         digest[1] = (unsigned char) ((context->state >> 16) & 0xff);
      54          25 :         digest[2] = (unsigned char) ((context->state >> 8) & 0xff);
      55          25 :         digest[3] = (unsigned char) (context->state & 0xff);
      56          25 :         context->state = 0;
      57          25 : }
      58             : 
      59           2 : PHP_HASH_API int PHP_ADLER32Copy(const php_hash_ops *ops, PHP_ADLER32_CTX *orig_context, PHP_ADLER32_CTX *copy_context)
      60             : {
      61           2 :         copy_context->state = orig_context->state;
      62           2 :         return SUCCESS;
      63             : }
      64             : 
      65             : const php_hash_ops php_hash_adler32_ops = {
      66             :         (php_hash_init_func_t) PHP_ADLER32Init,
      67             :         (php_hash_update_func_t) PHP_ADLER32Update,
      68             :         (php_hash_final_func_t) PHP_ADLER32Final,
      69             :         (php_hash_copy_func_t) PHP_ADLER32Copy,
      70             :         4, /* what to say here? */
      71             :         4,
      72             :         sizeof(PHP_ADLER32_CTX)
      73             : };
      74             : 
      75             : /*
      76             :  * Local variables:
      77             :  * tab-width: 4
      78             :  * c-basic-offset: 4
      79             :  * End:
      80             :  * vim600: sw=4 ts=4 fdm=marker
      81             :  * vim<600: sw=4 ts=4
      82             :  */

Generated by: LCOV version 1.10

Generated at Thu, 16 Oct 2014 05:27:02 +0000 (4 days ago)

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