//=========================================================
//  MusE
//  Linux Music Editor
//    $Id: mmath.h,v 1.1.1.1 2003/10/27 18:54:47 wschweer Exp $
//
//  (C) Copyright 2000 Werner Schweer (ws@seh.de)
//
//  This program 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; version 2 of
//  the License, or (at your option) any later version.
//
//  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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
//=========================================================

#ifndef __MATH_H__
#define __MATH_H__

#define LOG_MIN 1.0e-100
#define LOG_MAX 1.0e100

namespace MusECore {

double qwtCeil125(double x);
double qwtFloor125(double x);
void qwtTwistArray(double *array, int size);
int qwtChkMono(double *array, int size);
void qwtLinSpace(double *array, int size, double xmin, double xmax);
void qwtLogSpace(double *array, int size, double xmin, double xmax);

template <class T>
inline int qwtSign(const T& x)
{
    if (x > T(0))
       return 1;
    else if (x < T(0))
       return (-1);
    else
       return 0;
}			

inline int qwtInt(double x)
{
    return int(rint(x));
}

template <class T>
inline T qwtAbs (const T& x)
{
    return( x > T(0) ? x : -x );
}

template <class T>
inline const T& qwtMax (const T& x, const T& y)
{
    return ( x > y ? x : y );
}

template <class T>
inline const T& qwtMin ( const T& x, const T& y)
{
    return ( x < y ? x : y );
}


template <class T>
T qwtLim(const T& x, const T& x1, const T& x2)
{
    T rv;
    T xmin, xmax;

    xmin = qwtMin(x1, x2);
    xmax = qwtMax(x1, x2);

    if ( x < xmin )
       rv = xmin;
    else if ( x > xmax )
       rv = xmax;
    else
       rv = x;

    return rv;
}

}

#endif