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<?php /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4 foldmethod=marker: */ // {{{ Header /** * File contains Math_Numerical_RootFinding base class. * * PHP versions 4 and 5 * * LICENSE: * * BSD License * * Copyright (c) 2004-2006 Firman Wandayandi * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * 3. Neither the name of Firman Wandayandi nor the names of * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * @category Math * @package Math_Numerical_RootFinding * @author Firman Wandayandi <firman@php.net> * @copyright Copyright (c) 2004-2006 Firman Wandayandi * @license http://www.opensource.org/licenses/bsd-license.php * BSD License * @version CVS: $Id: RootFinding.php,v 1.4 2006/01/30 18:22:02 firman Exp $ */ // }}} // {{{ Dependencies /** * Require PEAR for handling errors. */ require_once 'PEAR.php'; // }}} // {{{ Global variables /** * Method driver aliases in order to create the prety file names, * also for insensitive-case of method name calls. * * @global array $GLOBALS['_Math_Numerical_RootFinding_drivers'] * @_Math_Numerical_RootFinding_drivers */ $GLOBALS['_Math_Numerical_RootFinding_drivers'] = array( 'bisection' => 'Bisection', 'falseposition' => 'FalsePosition', 'fixedpoint' => 'FixedPoint', 'newtonraphson' => 'NewtonRaphson', 'newtonraphson2' => 'NewtonRaphson2', 'ralstonrabinowitz' => 'RalstonRabinowitz', 'secant' => 'Secant' ); // }}} // {{{ Class: Math_Numerical_RootFinding /** * Math_Numerical_RootFinding base class. * * This class intended for build API structure and abstract class members. * * @category Math * @package Math_Numerical_RootFinding * @author Firman Wandayandi <firman@php.net> * @copyright Copyright (c) 2004-2006 Firman Wandayandi * @license http://www.opensource.org/licenses/bsd-license.php * BSD License * @version Release: 1.0.0 */ class Math_Numerical_RootFinding { // {{{ factory() /** * Create new instance of RootFinding method class. * * @param string $method Method name. * @param array $options (optional) Options (options is available in * specified method class). * * @return object New method's class on success or PEAR_Error on failure. * @access public * @static */ function &factory($method, $options = null) { $method = strtolower(trim($method)); if (!isset($GLOBALS['_Math_Numerical_RootFinding_drivers'][$method])) { return PEAR::raiseError('Driver file not found for ' . '\'' . $method . '\' method'); } $method = $GLOBALS['_Math_Numerical_RootFinding_drivers'][$method]; $filename = dirname(__FILE__) . '/RootFinding/' . $method . '.php'; if (!file_exists($filename)) { return PEAR::raiseError('Driver file not found for ' . '\'' . $method . '\' method'); } include_once $filename; $classname = 'Math_Numerical_RootFinding_' . $method; if (!class_exists($classname)) { return PEAR::raiseError('Undefined class \'' . $classname . '\''); } $obj =& new $classname; if (!is_object($obj) || !is_a($obj, $classname)) { return PEAR::raiseError('Failed creating object from class '. '\'' . $classname . '\''); } if ($options !== null) { $err = $obj->set($options); if (PEAR::isError($err)) { return $err; } } return $obj; } // }}} } // }}} /* * Local variables: * mode: php * tab-width: 4 * c-basic-offset: 4 * c-hanging-comment-ender-p: nil * End: */ ?>
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