# GmpBigIntegerFactory.class.php

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    00001 <?php
    00002 /***************************************************************************
    00003  *   Copyright (C) 2007 by Anton E. Lebedevich                             *
    00004  *                                                                         *
    00005  *   This program is free software; you can redistribute it and/or modify  *
    00006  *   it under the terms of the GNU Lesser General Public License as        *
    00007  *   published by the Free Software Foundation; either version 3 of the    *
    00008  *   License, or (at your option) any later version.                       *
    00009  *                                                                         *
    00010  ***************************************************************************/
    00011
    00015     final class GmpBigIntegerFactory extends BigNumberFactory
    00016     {
    00020         public static function me()
    00021         {
    00022             return Singleton::getInstance(__CLASS__);
    00023         }
    00024
    00028         public function makeNumber($number, $base = 10)
    00029         {
    00030             return GmpBigInteger::make($number, $base);
    00031         }
    00032
    00036         public function makeFromBinary($binary)
    00037         {
    00038             return GmpBigInteger::makeFromBinary($binary);
    00039         }
    00040
    00044         public function makeRandom($stop, RandomSource $source)
    00045         {
    00046             if (is_string($stop)) {
    00047                 $stop = $this->makeNumber($stop);
    00048             } elseif (
    00049                 $stop instanceof BigInteger
    00050                 && !$stop instanceof GmpBigInteger
    00051             ) {
    00052                 $stop = $this->makeNumber($stop->toString());
    00053             }
    00054
    00055             Assert::isTrue($stop instanceof GmpBigInteger);
    00056
    00057             $numBytes = ceil(log($stop->floatValue(), 2) / 8);
    00058
    00059             return $this->
    00060                 makeFromBinary("\x00".$source->getBytes($numBytes))->
    00061                 mod($stop);
    00062         }
    00063     }
    00064 ?>