includes/math.php
author Dan
Sun, 04 May 2008 21:57:48 -0400
changeset 541 acb7e23b6ffa
parent 536 218a627eb53e
child 685 17ebe24cdf85
permissions -rw-r--r--
Massive commit with various changes. Added user ranks system (no admin interface yet) and ability for users to have custom user titles. Made cron framework accept fractions of hours through floating-point intervals. Modifed ACL editor to use miniPrompt framework for close confirmation box. Made avatar system use a special page as opposed to fetching the files directly for caching reasons.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
467
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
     1
<?php
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
     2
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
     3
/*
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
     4
 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
536
218a627eb53e Rebrand as 1.1.4 (Caoineag alpha 4)
Dan
parents: 507
diff changeset
     5
 * Version 1.1.4 (Caoineag alpha 4)
218a627eb53e Rebrand as 1.1.4 (Caoineag alpha 4)
Dan
parents: 507
diff changeset
     6
 * Copyright (C) 2006-2008 Dan Fuhry
467
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
     7
 * diffiehellman.php - Diffie Hellman key exchange and supporting functions
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
     8
 *
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
     9
 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    10
 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    11
 *
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    12
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    13
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    14
 */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    15
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    16
/**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    17
 * EnanoMath GMP backend
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    18
 */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    19
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    20
class EnanoMath_GMP
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    21
{
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    22
  var $api = 'GMP';
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    23
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    24
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    25
   * Initializes a number to a GMP integer.
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    26
   * @param string String representation of the number
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    27
   * @param int Base the number is currently in, defaults to 10
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    28
   * @return resource
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    29
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    30
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    31
  function init($int, $base = 10)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    32
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    33
    return ( is_resource($int) ) ? $int : gmp_init($int, $base);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    34
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    35
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    36
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    37
   * Converts a number from a GMP integer to a string
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    38
   * @param resource
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    39
   * @param int Base, default is 10
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    40
   * @return string
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    41
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    42
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    43
  function str($int, $base = 10)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    44
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    45
    return ( is_string($int) ) ? $int : gmp_strval($int, $base);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    46
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    47
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    48
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    49
   * Converts a number between bases.
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    50
   * @param resource BigInt to convert
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    51
   * @param int Base to convert from
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    52
   * @param int Base to convert to
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    53
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    54
   
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    55
  function basecon($int, $from, $to)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    56
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    57
    return $this->init(gmp_strval(gmp_init($this->str($int), $from), $to));
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    58
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    59
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    60
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    61
   * Generates a random integer.
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    62
   * @param int Length
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    63
   * @return resource
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    64
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    65
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    66
  function random($len)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    67
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    68
    return gmp_random($len);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    69
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    70
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    71
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    72
   * Powmod operation (calculates (a ^ b) mod m)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    73
   * @param resource a
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    74
   * @param resource b
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    75
   * @param resource m
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    76
   * @return resource
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    77
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    78
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    79
  function powmod($a, $b, $m)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    80
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    81
    $a = $this->init($a);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    82
    $b = $this->init($b);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    83
    $m = $this->init($m);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    84
    return ( function_exists('gmp_powm') ) ? gmp_powm($a, $b, $m) : gmp_mod(gmp_pow($a, $b), $m);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    85
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    86
}
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    87
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    88
/**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    89
 * EnanoMath big_int backend
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    90
 */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    91
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    92
class EnanoMath_BigInt
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    93
{
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    94
  var $api = 'big_int';
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    95
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    96
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    97
   * Initializes a number to a BigInt integer.
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    98
   * @param string String representation of the number
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
    99
   * @param int Base the number is in, defaults to 10
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   100
   * @return resource
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   101
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   102
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   103
  function init($int, $base = 10)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   104
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   105
    return (is_resource($int)) ? $int : bi_from_str($int, $base);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   106
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   107
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   108
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   109
   * Converts a number from a BigInt integer to a string
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   110
   * @param resource
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   111
   * @param int Base, default is 10
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   112
   * @return string
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   113
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   114
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   115
  function str($int, $base = 10)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   116
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   117
    return ( is_string($int) ) ? $int : bi_to_str($int, $base);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   118
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   119
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   120
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   121
   * Generates a random integer
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   122
   * @param int Length (bits)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   123
   * @return resource
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   124
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   125
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   126
  function random($len)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   127
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   128
    return bi_rand($len);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   129
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   130
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   131
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   132
   * Converts a number between bases.
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   133
   * @param resource BigInt to convert
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   134
   * @param int Base to convert from
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   135
   * @param int Base to convert to
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   136
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   137
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   138
  function basecon($int, $from, $to)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   139
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   140
    return bi_base_convert($this->str($int, $from), $from, $to);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   141
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   142
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   143
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   144
   * Powmod operation (calculates (a ^ b) mod m)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   145
   * @param resource a
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   146
   * @param resource b
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   147
   * @param resource m
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   148
   * @return resource
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   149
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   150
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   151
  function powmod($a, $b, $m)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   152
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   153
    $a = $this->init($a);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   154
    $b = $this->init($b);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   155
    $m = $this->init($m);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   156
    return bi_powmod($a, $b, $m);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   157
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   158
}
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   159
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   160
/**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   161
 * EnanoMath BCMath backend
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   162
 */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   163
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   164
class EnanoMath_BCMath
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   165
{
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   166
  var $api = 'BCMath';
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   167
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   168
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   169
   * Initializes a number to a BCMath integer.
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   170
   * @param string String representation of the number
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   171
   * @param int Base the number is in, defaults to 10
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   172
   * @return resource
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   173
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   174
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   175
  function init($int, $base = 10)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   176
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   177
    return $this->basecon($int, $base, 10);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   178
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   179
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   180
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   181
   * Converts a number from a BCMath integer to a string
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   182
   * @param resource
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   183
   * @param int Base, default is 10
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   184
   * @return string
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   185
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   186
   
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   187
  function str($res)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   188
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   189
    return ( is_string($res) ) ? $res : strval($this->basecon($res, 10, $base));
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   190
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   191
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   192
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   193
   * Generates a random integer
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   194
   * @param int Length in bits
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   195
   * @return resource
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   196
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   197
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   198
  function random($len)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   199
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   200
    $len = 4 * $len;
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   201
    $chars = '0123456789abcdef';
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   202
    $ret = '';
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   203
    for ( $i = 0; $i < $len; $i++ )
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   204
    {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   205
      $chid = mt_rand ( 0, strlen($chars) - 1 );
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   206
      $chr = $chars{$chid};
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   207
      $ret .= $chr;
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   208
    }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   209
    return $this->basecon($this->init($ret), 16, 10);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   210
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   211
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   212
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   213
   * Converts a number between bases.
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   214
   * @param resource BigInt to convert
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   215
   * @param int Base to convert from
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   216
   * @param int Base to convert to
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   217
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   218
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   219
  function basecon($int, $from, $to)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   220
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   221
    if ( $from != 10 )
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   222
      $int = $this->_bcmath_base2dec($int, $from);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   223
    if ( $to != 10 )
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   224
      $int = $this->_bcmath_dec2base($int, $to);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   225
    return $int;
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   226
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   227
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   228
  /**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   229
   * Powmod operation (calculates (a ^ b) mod m)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   230
   * @param resource a
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   231
   * @param resource b
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   232
   * @param resource m
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   233
   * @return resource
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   234
   */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   235
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   236
  function powmod($a, $b, $m)
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   237
  {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   238
    $a = $this->init($a);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   239
    $b = $this->init($b);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   240
    $m = $this->init($m);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   241
    return ( function_exists('bcpowmod') ) ? bcpowmod($a, $b, $m) : bcmod( bcpow($a, $b), $m );
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   242
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   243
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   244
  // from us.php.net/bc:
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   245
  // convert a decimal value to any other base value
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   246
  function _bcmath_dec2base($dec,$base,$digits=FALSE) {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   247
      if($base<2 or $base>256) die("Invalid Base: ".$base);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   248
      bcscale(0);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   249
      $value="";
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   250
      if(!$digits) $digits=$this->_bcmath_digits($base);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   251
      while($dec>$base-1) {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   252
          $rest=bcmod($dec,$base);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   253
          $dec=bcdiv($dec,$base);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   254
          $value=$digits[$rest].$value;
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   255
      }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   256
      $value=$digits[intval($dec)].$value;
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   257
      return (string) $value;
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   258
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   259
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   260
  // convert another base value to its decimal value
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   261
  function _bcmath_base2dec($value,$base,$digits=FALSE) {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   262
      if($base<2 or $base>256) die("Invalid Base: ".$base);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   263
      bcscale(0);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   264
      if($base<37) $value=strtolower($value);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   265
      if(!$digits) $digits=$this->_bcmath_digits($base);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   266
      $size=strlen($value);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   267
      $dec="0";
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   268
      for($loop=0;$loop<$size;$loop++) {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   269
          $element=strpos($digits,$value[$loop]);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   270
          $power=bcpow($base,$size-$loop-1);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   271
          $dec=bcadd($dec,bcmul($element,$power));
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   272
      }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   273
      return (string) $dec;
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   274
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   275
  
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   276
  function _bcmath_digits($base) {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   277
      if($base>64) {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   278
          $digits="";
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   279
          for($loop=0;$loop<256;$loop++) {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   280
              $digits.=chr($loop);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   281
          }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   282
      } else {
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   283
          $digits ="0123456789abcdefghijklmnopqrstuvwxyz";
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   284
          $digits.="ABCDEFGHIJKLMNOPQRSTUVWXYZ-_";
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   285
      }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   286
      $digits=substr($digits,0,$base);
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   287
      return (string) $digits;
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   288
  }
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   289
}
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   290
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   291
/**
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   292
 * Creates a new math object based on what libraries are available.
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   293
 * @return object
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   294
 */
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   295
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   296
function enanomath_create()
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   297
{
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   298
  if ( function_exists('gmp_init') )
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   299
    return new EnanoMath_GMP();
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   300
  else if ( function_exists('bi_from_str') )
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   301
    return new EnanoMath_BigInt();
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   302
  else if ( function_exists('bcadd') )
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   303
    return new EnanoMath_BCMath();
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   304
  else
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   305
    throw new Exception('dh_err_not_supported');
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   306
}
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   307
e4bbd6fb8df3 Modifed EnanoMath layer by segregating it into its own file; got support for big_int PHP extension backend working
Dan
parents:
diff changeset
   308
?>