integrator.cpp

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/*
 * integrator.cpp - integrator class implementation
 *
 * Copyright (C) 2004, 2005, 2006 Stefan Jahn <stefan@lkcc.org>
 *
 * This is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this package; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 * $Id$
 *
 */

#if HAVE_CONFIG_H
# include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "integrator.h"

// Some definitions for the save-state variables.
#define STATE_SHIFT 3
#define STATE_NUM   8
#define STATE_MASK  7

namespace qucs {

// Constructor creates an unnamed instance of the integrator class.
integrator::integrator () : states<nr_double_t> () {
  coefficients = NULL;
  order = 0;
  state = 0;
  integrate_func = NULL;
  conductor_func = NULL;
}

/* The copy constructor creates a new instance based on the given
   integrator object. */
integrator::integrator (const integrator & c) : states<nr_double_t> (c) {
  coefficients = c.coefficients;
  order = c.order;
  state = c.state;
  integrate_func = c.integrate_func;
  conductor_func = c.conductor_func;
}

// Destructor deletes a integrator object.
integrator::~integrator () {
}

/* The function evaluates the state of the integration-using component
   and runs the appropriate integrator function. */
void integrator::integrate (int qstate, nr_double_t cap, nr_double_t& geq,
                            nr_double_t& ceq) {
  int cstate = qstate + 1;
  if (state & MODE_INIT) fillState (qstate, getState (qstate));
  (*integrate_func) (this, qstate, cap, geq, ceq);
  if (state & MODE_INIT) fillState (cstate, getState (cstate));
}

/* This function runs the appropriate conductor function. */
void integrator::conductor (nr_double_t cap, nr_double_t& geq) {
  (*conductor_func) (this, cap, geq);
}

} // namespace qucs