includes/math.php
author Dan Fuhry <dan@enanocms.org>
Fri, 02 Dec 2011 01:15:55 -0500
changeset 1355 12c23b83c79d
parent 1227 bdac73ed481e
child 1380 0e400f946644
permissions -rw-r--r--
Conditionally declare hex2bin() due to a function of the same name being introduced in PHP 5.4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<?php
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/*
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 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
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 * Copyright (C) 2006-2009 Dan Fuhry
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 * diffiehellman.php - Diffie Hellman key exchange and supporting functions
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 *
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 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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 */
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/**
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 * EnanoMath GMP backend
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 */
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class EnanoMath_GMP
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{
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	var $api = 'GMP';
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	/**
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 	* Initializes a number to a GMP integer.
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 	* @param string String representation of the number
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 	* @param int Base the number is currently in, defaults to 10
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 	* @return resource
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 	*/
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	function init($int, $base = 10)
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	{
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		return ( is_resource($int) ) ? $int : gmp_init($int, $base);
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	}
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	/**
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 	* Converts a number from a GMP integer to a string
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 	* @param resource
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 	* @param int Base, default is 10
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 	* @return string
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 	*/
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	function str($int, $base = 10)
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	{
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		return ( is_string($int) ) ? $int : gmp_strval($int, $base);
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	}
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	/**
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 	* Converts a number between bases.
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 	* @param resource BigInt to convert
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 	* @param int Base to convert from
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 	* @param int Base to convert to
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 	*/
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	function basecon($int, $from, $to)
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	{
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		return $this->init(gmp_strval(gmp_init($this->str($int), $from), $to));
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	}
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	/**
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 	* Generates a random integer.
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 	* @param int Length
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 	* @return resource
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 	*/
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	function random($len)
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	{
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		return gmp_random($len / 8);
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	}
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	/**
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 	* Powmod operation (calculates (a ^ b) mod m)
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 	* @param resource a
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 	* @param resource b
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 	* @param resource m
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 	* @return resource
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 	*/
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	function powmod($a, $b, $m)
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	{
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		$a = $this->init($a);
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		$b = $this->init($b);
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		$m = $this->init($m);
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		return ( function_exists('gmp_powm') ) ? gmp_powm($a, $b, $m) : gmp_mod(gmp_pow($a, $b), $m);
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	}
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}
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/**
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 * EnanoMath big_int backend
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 */
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class EnanoMath_BigInt
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{
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	var $api = 'big_int';
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	/**
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 	* Initializes a number to a BigInt integer.
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 	* @param string String representation of the number
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 	* @param int Base the number is in, defaults to 10
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 	* @return resource
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   100
 	*/
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   101
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   102
	function init($int, $base = 10)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   103
	{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   104
		return (is_resource($int)) ? $int : bi_from_str($int, $base);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   105
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   106
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   107
	/**
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   108
 	* Converts a number from a BigInt integer to a string
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   109
 	* @param resource
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   110
 	* @param int Base, default is 10
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   111
 	* @return string
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   112
 	*/
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   113
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   114
	function str($int, $base = 10)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   115
	{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   116
		return ( is_string($int) ) ? $int : bi_to_str($int, $base);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   117
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   118
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   119
	/**
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   120
 	* Generates a random integer
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   121
 	* @param int Length (bits)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   122
 	* @return resource
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   123
 	*/
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   124
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   125
	function random($len)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   126
	{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   127
		return bi_rand($len);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   128
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   129
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   130
	/**
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   131
 	* Converts a number between bases.
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   132
 	* @param resource BigInt to convert
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   133
 	* @param int Base to convert from
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   134
 	* @param int Base to convert to
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   135
 	*/
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   136
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   137
	function basecon($int, $from, $to)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   138
	{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   139
		return bi_base_convert($this->str($int, $from), $from, $to);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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   140
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   141
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   142
	/**
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   143
 	* Powmod operation (calculates (a ^ b) mod m)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   144
 	* @param resource a
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   145
 	* @param resource b
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   146
 	* @param resource m
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   147
 	* @return resource
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   148
 	*/
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   149
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   150
	function powmod($a, $b, $m)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   151
	{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   152
		$a = $this->init($a);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   153
		$b = $this->init($b);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   154
		$m = $this->init($m);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   155
		return bi_powmod($a, $b, $m);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   156
	}
467
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
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   157
}
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   158
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
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   159
/**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
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   160
 * EnanoMath BCMath backend
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
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   161
 */
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   162
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
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class EnanoMath_BCMath
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
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{
1227
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   165
	var $api = 'BCMath';
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   166
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   167
	/**
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   168
 	* Initializes a number to a BCMath integer.
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   169
 	* @param string String representation of the number
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   170
 	* @param int Base the number is in, defaults to 10
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   171
 	* @return resource
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   172
 	*/
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   173
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   174
	function init($int, $base = 10)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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   175
	{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   176
		return $this->basecon($int, $base, 10);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   177
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   178
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   179
	/**
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   180
 	* Converts a number from a BCMath integer to a string
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   181
 	* @param resource
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   182
 	* @param int Base, default is 10
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   183
 	* @return string
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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parents: 1081
diff changeset
   184
 	*/
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   185
 	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   186
	function str($res)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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   187
	{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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parents: 1081
diff changeset
   188
		return ( is_string($res) ) ? $res : strval($this->basecon($res, 10, $base));
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   189
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   190
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   191
	/**
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   192
 	* Generates a random integer
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   193
 	* @param int Length in bits
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   194
 	* @return resource
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   195
 	*/
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   197
	function random($len)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   198
	{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   199
		$len = 4 * $len;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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		$chars = '0123456789abcdef';
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   201
		$ret = '';
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   202
		for ( $i = 0; $i < $len; $i++ )
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   203
		{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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			$chid = mt_rand ( 0, strlen($chars) - 1 );
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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			$chr = $chars{$chid};
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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			$ret .= $chr;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   207
		}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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		return $this->basecon($this->init($ret), 16, 10);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   209
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   210
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   211
	/**
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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 	* Converts a number between bases.
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   213
 	* @param resource BigInt to convert
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   214
 	* @param int Base to convert from
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   215
 	* @param int Base to convert to
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   216
 	*/
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   217
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   218
	function basecon($int, $from, $to)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   219
	{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   220
		if ( $from != 10 )
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   221
			$int = $this->_bcmath_base2dec($int, $from);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   222
		if ( $to != 10 )
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   223
			$int = $this->_bcmath_dec2base($int, $to);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   224
		return $int;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   225
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   226
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   227
	/**
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   228
 	* Powmod operation (calculates (a ^ b) mod m)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   229
 	* @param resource a
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   230
 	* @param resource b
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   231
 	* @param resource m
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   232
 	* @return resource
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   233
 	*/
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   234
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   235
	function powmod($a, $b, $m)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   236
	{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   237
		$a = $this->init($a);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   238
		$b = $this->init($b);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   239
		$m = $this->init($m);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   240
		return ( function_exists('bcpowmod') ) ? bcpowmod($a, $b, $m) : bcmod( bcpow($a, $b), $m );
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   241
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   242
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   243
	// from us.php.net/bc:
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   244
	// convert a decimal value to any other base value
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   245
	function _bcmath_dec2base($dec,$base,$digits=FALSE) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   246
			if($base<2 or $base>256) die("Invalid Base: ".$base);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   247
			bcscale(0);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   248
			$value="";
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   249
			if(!$digits) $digits=$this->_bcmath_digits($base);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   250
			while($dec>$base-1) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   251
					$rest=bcmod($dec,$base);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   252
					$dec=bcdiv($dec,$base);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   253
					$value=$digits[$rest].$value;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   254
			}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   255
			$value=$digits[intval($dec)].$value;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   256
			return (string) $value;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   257
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   258
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   259
	// convert another base value to its decimal value
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   260
	function _bcmath_base2dec($value,$base,$digits=FALSE) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   261
			if($base<2 or $base>256) die("Invalid Base: ".$base);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   262
			bcscale(0);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   263
			if($base<37) $value=strtolower($value);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   264
			if(!$digits) $digits=$this->_bcmath_digits($base);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   265
			$size=strlen($value);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   266
			$dec="0";
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   267
			for($loop=0;$loop<$size;$loop++) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   268
					$element=strpos($digits,$value[$loop]);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   269
					$power=bcpow($base,$size-$loop-1);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   270
					$dec=bcadd($dec,bcmul($element,$power));
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   271
			}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   272
			return (string) $dec;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   273
	}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
parents: 1081
diff changeset
   274
	
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   275
	function _bcmath_digits($base) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   276
			if($base>64) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   277
					$digits="";
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   278
					for($loop=0;$loop<256;$loop++) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   279
							$digits.=chr($loop);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
Dan
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diff changeset
   280
					}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   281
			} else {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   282
					$digits ="0123456789abcdefghijklmnopqrstuvwxyz";
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
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					$digits.="ABCDEFGHIJKLMNOPQRSTUVWXYZ-_";
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			}
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			$digits=substr($digits,0,$base);
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			return (string) $digits;
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	}
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}
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/**
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 * Creates a new math object based on what libraries are available.
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 * @return object
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 */
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function enanomath_create()
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{
1227
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	if ( function_exists('gmp_init') )
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		return new EnanoMath_GMP();
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	else if ( function_exists('bi_from_str') )
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		return new EnanoMath_BigInt();
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	else if ( function_exists('bcadd') )
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		return new EnanoMath_BCMath();
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	else
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		throw new Exception('dh_err_not_supported');
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}
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?>