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/***********************************************************************
*
* LUSH Lisp Universal Shell
* Copyright (C) 2002 Leon Bottou, Yann Le Cun, AT&T Corp, NECI.
* Includes parts of TL3:
* Copyright (C) 1987-1999 Leon Bottou and Neuristique.
* Includes selected parts of SN3.2:
* Copyright (C) 1991-2001 AT&T Corp.
*
* 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; either 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., 59 Temple Place, Suite 330, Boston, MA 02111, USA
*
***********************************************************************/
/***********************************************************************
* $Id: fltlib.h,v 1.4 2004/02/09 20:59:51 leonb Exp $
**********************************************************************/
#ifndef FLTLIB_H
#define FLTLIB_H
#ifndef DEFINE_H
#include "define.h"
#endif
#ifdef __cplusplus
extern "C" {
#ifndef __cplusplus
}
#endif
#endif
/* 'real' is the natural floating point type */
#define real double
/* 'flt' is a fast single precision floating point type */
#define flt float
/* Constants */
#define Fzero ((flt)0.0)
#define Fone ((flt)1.0)
#define Ftwo ((flt)2.0)
#define Fminus ((flt)-1.0)
#define Fhalf ((flt)0.5)
/* ... double precision */
#define Dzero ((double)0.0)
#define Done ((double)1.0)
#define Dtwo ((double)2.0)
#define Dminus ((double)-1.0)
#define Dhalf ((double)0.5)
/* Compatibility */
#define Ftor(x) ((real)(x))
#define Ftod(x) ((double)(x))
#define rtoF(x) ((flt)(x))
#define dtoF(x) ((flt)(x))
/* Standard Math routines */
#define Fsqrt(x) ((flt)sqrt((double)x))
#define Finv(x) ((flt)(1.0/(double)x))
#define Fsin(x) ((flt)sin((double)x))
#define Fcos(x) ((flt)cos((double)x))
#define Ftan(x) ((flt)tan((double)x))
#define Fasin(x) ((flt)asin((double)x))
#define Facos(x) ((flt)acos((double)x))
#define Fatan(x) ((flt)atan((double)x))
#define Fexp(x) ((flt)exp((double)x))
#define Fexpm1(x) ((flt)expm1((double)x))
#define Flog(x) ((flt)log((double)x))
#define Flog1p(x) ((flt)log1p((double)x))
#define Fsinh(x) ((flt)sinh((double)x))
#define Fcosh(x) ((flt)cosh((double)x))
#define Ftanh(x) ((flt)tanh((double)x))
#define Fatanh(x) ((flt)atanh((double)x))
/* ... double precision */
#define Dsqrt(x) ((double)sqrt((double)x))
#define Dinv(x) ((double)(1.0/(double)x))
#define Dsin(x) ((double)sin((double)x))
#define Dcos(x) ((double)cos((double)x))
#define Dtan(x) ((double)tan((double)x))
#define Dasin(x) ((double)asin((double)x))
#define Dacos(x) ((double)acos((double)x))
#define Datan(x) ((double)atan((double)x))
#define Dexp(x) ((double)exp((double)x))
#define Dexpm1(x) ((double)expm1((double)x))
#define Dlog(x) ((double)log((double)x))
#define Dlog1p(x) ((double)log1p((double)x))
#define Dsinh(x) ((double)sinh((double)x))
#define Dcosh(x) ((double)cosh((double)x))
#define Dtanh(x) ((double)tanh((double)x))
#define Datanh(x) ((double)atanh((double)x))
/* Piecewise functions */
#define Ffloor(x) ((flt)floor((double)x))
#define Fabs(x) (((x)<Fzero)?-(x):(x))
#define Fsgn(x) (((x)<Fzero)?Fminus:Fone)
#define Fpiece(x) (((x)<Fminus)?Fminus:(((x)<Fone)?x:Fone))
#define Frect(x) ((((x)>Fminus)&&((x)<Fone))?Fone:Fzero)
/* ... double precision */
#define Dfloor(x) ((double)floor((double)x))
#define Dabs(x) (((x)<Dzero)?-(x):(x))
#define Dsgn(x) (((x)<Dzero)?Dminus:Done)
#define Dpiece(x) (((x)<Dminus)?Dminus:(((x)<Done)?x:Done))
#define Drect(x) ((((x)>Dminus)&&((x)<Done))?Done:Dzero)
/* Rational approximation of TANH, SIGMOIDS */
/* Declarations for EXP(-|X|), EXP(-X2) */
LUSHAPI flt FQtanh(flt x);
LUSHAPI flt FQDtanh(flt x);
LUSHAPI flt FQstdsigmoid(flt x);
LUSHAPI flt FQDstdsigmoid(flt x);
LUSHAPI flt FQexpmx(flt x);
LUSHAPI flt FQDexpmx(flt x);
LUSHAPI flt FQexpmx2(flt x);
LUSHAPI flt FQDexpmx2(flt x);
/* Spline interpolation */
LUSHAPI void Fsplinit(int size, flt *parm);
LUSHAPI flt Fspline(flt x, int size, flt *parm);
LUSHAPI flt Fdspline(flt x, int size, flt *parm);
/* Random functions */
LUSHAPI flt Frand(void);
LUSHAPI flt Fgauss(void);
LUSHAPI void Fseed(int x);
/* Rational approximation of TANH, SIGMOIDS */
/* Declarations for EXP(-|X|), EXP(-X2) */
LUSHAPI real DQtanh(real x);
LUSHAPI real DQDtanh(real x);
LUSHAPI real DQstdsigmoid(real x);
LUSHAPI real DQDstdsigmoid(real x);
LUSHAPI real DQexpmx(real x);
LUSHAPI real DQDexpmx(real x);
LUSHAPI real DQexpmx2(real x);
LUSHAPI real DQDexpmx2(real x);
/* Spline interpolation */
LUSHAPI void Dsplinit(int size, real *parm);
LUSHAPI real Dspline(real x, int size, real *parm);
LUSHAPI real Ddspline(real x, int size, real *parm);
/* Random functions */
LUSHAPI real Drand(void);
LUSHAPI real Dgauss(void);
LUSHAPI void Dseed(int x);
/* ------------------------------------------------------- */
#ifdef __cplusplus
}
#else
# define HAVE_COMPLEXREAL
# ifdef HAVE_COMPLEX
# include <complex.h>
typedef complex double complexreal;
extern LUSHAPI complexreal Ci;
LUSHAPI real Carg(complexreal z);
LUSHAPI real Cabs(complexreal z);
# define Creal(z) (creal(z))
# define Cimag(z) (cimag(z))
# define Cnew(r,i) ((r)+Ci*(i))
# define Cadd(x,y) ((x)+(y))
# define Csub(x,y) ((x)-(y))
# define Cmul(x,y) ((x)*(y))
# define Cdiv(x,y) ((x)/(y))
# define Cconj(z) (conj(z))
# else /* HAVE_COMPLEX */
struct complexreal_s { double r,i; };
typedef struct complexreal_s complexreal;
extern LUSHAPI complexreal Ci;
LUSHAPI real Carg(complexreal z);
LUSHAPI real Cabs(complexreal z);
# define Creal(z) ((z).r)
# define Cimag(z) ((z).i)
LUSHAPI complexreal Cnew(real, real);
LUSHAPI complexreal Cadd(complexreal, complexreal);
LUSHAPI complexreal Csub(complexreal, complexreal);
LUSHAPI complexreal Cmul(complexreal, complexreal);
LUSHAPI complexreal Cdiv(complexreal, complexreal);
LUSHAPI complexreal Cconj(complexreal z);
# endif /* HAVE_COMPLEX */
#endif /* __cplusplus */
#endif /* FLTLIB_H */
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