1,76 → 1,76 |
<?php |
// +----------------------------------------------------------------------+ |
// | PHP Version 4 | |
// +----------------------------------------------------------------------+ |
// | Copyright (c) 1997-2004 The PHP Group | |
// +----------------------------------------------------------------------+ |
// | This source file is subject to version 3.0 of the PHP license, | |
// | that is bundled with this package in the file LICENSE, and is | |
// | available at through the world-wide-web at | |
// | http://www.php.net/license/3_0.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. | |
// +----------------------------------------------------------------------+ |
// | Authors: Aidan Lister <aidan@php.net> | |
// +----------------------------------------------------------------------+ |
// |
// $Id: bcinvert.php,v 1.2 2005/11/22 20:24:45 aidan Exp $ |
|
|
/** |
* Replace bcinvert() |
* |
* @category PHP |
* @package PHP_Compat |
* @link http://php.net/function.bcinvert |
* @author Sara Golemon <pollita@php.net> |
* @version $Revision: 1.2 $ |
* @since PHP 5.2.0 |
* @require PHP 4.0.4 (call_user_func_array) |
*/ |
if (!function_exists('bcinvert')) { |
function bcinvert($a, $n) |
{ |
// Sanity check |
if (!is_scalar($a)) { |
user_error('bcinvert() expects parameter 1 to be string, ' . |
gettype($a) . ' given', E_USER_WARNING); |
return false; |
} |
|
if (!is_scalar($n)) { |
user_error('bcinvert() expects parameter 2 to be string, ' . |
gettype($n) . ' given', E_USER_WARNING); |
return false; |
} |
|
$u1 = $v2 = '1'; |
$u2 = $v1 = '0'; |
$u3 = $n; |
$v3 = $a; |
|
while (bccomp($v3, '0')) { |
$q0 = bcdiv($u3, $v3); |
$t1 = bcsub($u1, bcmul($q0, $v1)); |
$t2 = bcsub($u2, bcmul($q0, $v2)); |
$t3 = bcsub($u3, bcmul($q0, $v3)); |
|
$u1 = $v1; |
$u2 = $v2; |
$u3 = $v3; |
|
$v1 = $t1; |
$v2 = $t2; |
$v3 = $t3; |
} |
|
if (bccomp($u2, '0') < 0) { |
return bcadd($u2, $n); |
} else { |
return bcmod($u2, $n); |
} |
} |
} |
|
<?php |
// +----------------------------------------------------------------------+ |
// | PHP Version 4 | |
// +----------------------------------------------------------------------+ |
// | Copyright (c) 1997-2004 The PHP Group | |
// +----------------------------------------------------------------------+ |
// | This source file is subject to version 3.0 of the PHP license, | |
// | that is bundled with this package in the file LICENSE, and is | |
// | available at through the world-wide-web at | |
// | http://www.php.net/license/3_0.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. | |
// +----------------------------------------------------------------------+ |
// | Authors: Aidan Lister <aidan@php.net> | |
// +----------------------------------------------------------------------+ |
// |
// $Id: bcinvert.php,v 1.2 2005/11/22 20:24:45 aidan Exp $ |
|
|
/** |
* Replace bcinvert() |
* |
* @category PHP |
* @package PHP_Compat |
* @link http://php.net/function.bcinvert |
* @author Sara Golemon <pollita@php.net> |
* @version $Revision: 1.2 $ |
* @since PHP 5.2.0 |
* @require PHP 4.0.4 (call_user_func_array) |
*/ |
if (!function_exists('bcinvert')) { |
function bcinvert($a, $n) |
{ |
// Sanity check |
if (!is_scalar($a)) { |
user_error('bcinvert() expects parameter 1 to be string, ' . |
gettype($a) . ' given', E_USER_WARNING); |
return false; |
} |
|
if (!is_scalar($n)) { |
user_error('bcinvert() expects parameter 2 to be string, ' . |
gettype($n) . ' given', E_USER_WARNING); |
return false; |
} |
|
$u1 = $v2 = '1'; |
$u2 = $v1 = '0'; |
$u3 = $n; |
$v3 = $a; |
|
while (bccomp($v3, '0')) { |
$q0 = bcdiv($u3, $v3); |
$t1 = bcsub($u1, bcmul($q0, $v1)); |
$t2 = bcsub($u2, bcmul($q0, $v2)); |
$t3 = bcsub($u3, bcmul($q0, $v3)); |
|
$u1 = $v1; |
$u2 = $v2; |
$u3 = $v3; |
|
$v1 = $t1; |
$v2 = $t2; |
$v3 = $t3; |
} |
|
if (bccomp($u2, '0') < 0) { |
return bcadd($u2, $n); |
} else { |
return bcmod($u2, $n); |
} |
} |
} |
|
?> |