82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
/*
|
|
* Copyright (C) 2005 Maarten Keijzer
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of version 2 of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program 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 program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef INTERVAL__H__
|
|
#define INTERVAL__H__
|
|
|
|
#include <boost/numeric/interval.hpp>
|
|
#include <iostream>
|
|
#include <limits>
|
|
|
|
|
|
typedef boost::numeric::interval_lib::rounded_transc_exact<double> RoundingTransc;
|
|
typedef boost::numeric::interval_lib::save_state<RoundingTransc> Rounding;
|
|
typedef boost::numeric::interval_lib::checking_base<double> Checking;
|
|
typedef boost::numeric::interval_lib::policies<Rounding,Checking> Policy;
|
|
typedef boost::numeric::interval<double, Policy> Interval;
|
|
|
|
struct interval_error{};
|
|
|
|
inline bool valid(const Interval& val) {
|
|
if (!finite(val.lower()) || !finite(val.upper())) return false;
|
|
|
|
return val.lower() > -1e10 && val.upper() < 1e10;
|
|
}
|
|
|
|
inline Interval sqrt(const Interval& val) {
|
|
if (val.lower() < 0.0) {
|
|
return Interval::whole();
|
|
}
|
|
|
|
return boost::numeric::sqrt(val);
|
|
}
|
|
|
|
inline Interval sqr(const Interval& val) {
|
|
return square(val);
|
|
}
|
|
|
|
inline Interval acos(const Interval& val) {
|
|
if (val.lower() < 1.0 || val.upper() > 1.0) {
|
|
return Interval::whole();
|
|
}
|
|
|
|
return boost::numeric::acos(val);
|
|
}
|
|
|
|
inline Interval asin(const Interval& val) {
|
|
if (val.lower() < 1.0 || val.upper() > 1.0) {
|
|
return Interval::whole();
|
|
}
|
|
|
|
return boost::numeric::asin(val);
|
|
}
|
|
|
|
inline Interval acosh(const Interval& val) {
|
|
if (val.lower() < 1.0) return Interval::whole();
|
|
return boost::numeric::acosh(val);
|
|
}
|
|
|
|
inline
|
|
std::ostream& operator<<(std::ostream& os, const Interval& val) {
|
|
os << '[' << val.lower() << ", " << val.upper() << ']';
|
|
return os;
|
|
}
|
|
|
|
#ifdef TEST_INTERVAL
|
|
#endif
|
|
|
|
#endif
|