Qucs-core  0.0.19
devstates.cpp
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00001 /*
00002  * devstates.cpp - device state class implementation
00003  *
00004  * Copyright (C) 2006 Stefan Jahn <stefan@lkcc.org>
00005  *
00006  * This is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU General Public License as published by
00008  * the Free Software Foundation; either version 2, or (at your option)
00009  * any later version.
00010  *
00011  * This software is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU General Public License
00017  * along with this package; see the file COPYING.  If not, write to
00018  * the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
00019  * Boston, MA 02110-1301, USA.
00020  *
00021  * $Id$
00022  *
00023  */
00024 
00025 #if HAVE_CONFIG_H
00026 # include <config.h>
00027 #endif
00028 
00029 #include <stdio.h>
00030 #include <stdlib.h>
00031 #include <string.h>
00032 
00033 #include "devstates.h"
00034 
00035 namespace qucs {
00036 
00037 // Default constructor for device state class instance.
00038 devstates::devstates () {
00039   nstates = 0;
00040   nvars = 0;
00041   states = NULL;
00042   nstate = 0;
00043   pstate = NULL;
00044 }
00045 
00046 // Constructor for device state class instance.
00047 devstates::devstates (int vars, int states) {
00048   deviceStates (vars, states);
00049 }
00050 
00051 // Destructor for device state class instance.
00052 devstates::~devstates () {
00053   free (states);
00054 }
00055 
00056 /* Initializes the device state class instance containing the
00057    specified number of variables and states. */
00058 void devstates::deviceStates (int vars, int stats) {
00059   nvars = vars;
00060   nstates = stats;
00061   free (states);
00062   states = (nr_double_t *) malloc (sizeof (nr_double_t) * nvars * nstates);
00063   nstate = 0;
00064   pstate = states;
00065 }
00066 
00067 // Returns the number of states.
00068 int devstates::deviceStates (void) {
00069   return nstates;
00070 }
00071 
00072 // Sets the current state.
00073 void devstates::deviceState (int state) {
00074   nstate = state;
00075   pstate = &states[nvars * nstate];
00076 }
00077 
00078 // Returns the current state.
00079 int devstates::deviceState (void) {
00080   return nstate;
00081 }
00082 
00083 // Access operator for the given variable in the current state.
00084 nr_double_t devstates::operator () (int var) const {
00085   return pstate[var];
00086 }
00087 
00088 // Reference access operator for the given variable in the current state.
00089 nr_double_t& devstates::operator () (int var) {
00090   return pstate[var];
00091 }
00092 
00093 // Returns the given variable in the current state.
00094 nr_double_t devstates::deviceVar (int var) const {
00095   return pstate[var];
00096 }
00097 
00098 // Returns a reference to the given variable in the current state.
00099 nr_double_t& devstates::deviceVar (int var) {
00100   return pstate[var];
00101 }
00102 
00103 } // namespace qucs