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/*
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* R : A Computer Langage for Statistical Data Analysis
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* Copyright (C) 1995, 1996 Robert Gentleman and Ross Ihaka
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef MATHLIB_H_
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#define MATHLIB_H_
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#include "Arith.h"
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#ifdef Macintosh
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#include <fp.h>
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double hypot(double x, double y);
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#else
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#include <math.h>
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#endif
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/* SGI math.h conflict */
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#undef qexp
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#include <stdlib.h>
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#include <limits.h>
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#include <float.h>
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#include <errno.h>
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/* 30 Decimal-place constants computed with bc (scale=32; proper round) */
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#ifndef M_1_SQRT_2
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#define M_1_SQRT_2 0.707106781186547524400844362105
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#endif
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#ifndef M_PI
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#define M_PI 3.141592653589793238462643383279
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#endif
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#ifndef M_PI_half
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#define M_PI_half 1.570796326794896619231321691640
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#endif
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#ifndef M_SQRT_PI
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#define M_SQRT_PI 1.772453850905516027298167483341
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#endif
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#ifndef M_1_SQRT_2PI
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#define M_1_SQRT_2PI 0.398942280401432677939946059934
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#endif
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/* log(sqrt(2*pi)) = log(2*pi)/2 : */
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#ifndef M_LN_SQRT_2PI
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#define M_LN_SQRT_2PI 0.918938533204672741780329736406
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#endif
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#ifndef HAVE_RINT
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double rint(double);
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#endif
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/* Random Number Generation */
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extern double snorm(void);
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extern double sunif(void);
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extern double sexp(void);
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/* Port Constants */
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extern int F77_SYMBOL(i1mach)(int*);
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extern double F77_SYMBOL(d1mach)(int*);
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/* Fortran Compatibility */
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extern double fint(double);
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extern double fmax2(double, double);
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extern double fmin2(double, double);
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extern double fmod(double, double);
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extern double fsign(double, double);
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extern double fsquare(double);
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extern double fcube(double);
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extern int imax2(int, int);
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extern int imin2(int, int);
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/* Utilities */
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extern double rround(double, double);
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extern double prec(double, double);
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extern double sign(double);
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extern double trunc(double);
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/* Mathematical Special Functions */
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extern double beta(double, double);
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extern double lbeta(double, double);
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extern double gamma(double);
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extern double lgamma(double);
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extern double lfastchoose(double, double);
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extern double fastchoose(double, double);
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extern double choose(double, double);
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extern double lchoose(double, double);
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extern void dpsifn(double, int, int, int, double*, int*, int*);
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extern double digamma(double);
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extern double trigamma(double);
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extern double tetragamma(double);
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extern double pentagamma(double);
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/* Distributions */
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extern double dbeta(double, double, double);
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extern double pbeta(double, double, double);
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extern double pbeta_b(double, double, double, double);
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extern double qbeta(double, double, double);
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extern double rbeta(double, double);
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extern double dbinom(double, double, double);
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extern double pbinom(double, double, double);
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extern double qbinom(double, double, double);
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extern double rbinom(double, double);
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extern double dcauchy(double, double, double);
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extern double pcauchy(double, double, double);
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extern double qcauchy(double, double, double);
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extern double rcauchy(double, double);
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extern double dchisq(double, double);
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extern double pchisq(double, double);
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extern double qchisq(double, double);
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extern double rchisq(double);
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extern double dexp(double, double);
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extern double pexp(double, double);
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extern double qexp(double, double);
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extern double rexp(double);
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extern double df(double, double, double);
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extern double pf(double, double, double);
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extern double qf(double, double, double);
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extern double rf(double, double);
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extern double dgamma(double, double, double);
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extern double pgamma(double, double, double);
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extern double qgamma(double, double, double);
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extern double rgamma(double, double);
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extern double dgeom(double, double);
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extern double pgeom(double, double);
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extern double qgeom(double, double);
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extern double rgeom(double);
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extern double dhyper(double, double, double, double);
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extern double phyper(double, double, double, double);
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extern double qhyper(double, double, double, double);
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extern double rhyper(double, double, double);
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extern double dlnorm(double, double, double);
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extern double plnorm(double, double, double);
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extern double qlnorm(double, double, double);
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extern double rlnorm(double, double);
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extern double dlogis(double, double, double);
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extern double plogis(double, double, double);
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extern double qlogis(double, double, double);
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extern double rlogis(double, double);
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extern double dnbinom(double, double, double);
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extern double pnbinom(double, double, double);
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extern double qnbinom(double, double, double);
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extern double rnbinom(double, double);
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extern double dnchisq(double, double, double);
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extern double pnchisq(double, double, double);
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extern double qnchisq(double, double, double);
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extern double rnchisq(double, double);
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extern double dnorm(double, double, double);
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extern double pnorm(double, double, double);
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extern double qnorm(double, double, double);
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extern double rnorm(double, double);
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extern double dpois(double, double);
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extern double ppois(double, double);
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extern double qpois(double, double);
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extern double rpois(double);
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extern double dt(double, double);
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extern double pt(double, double);
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extern double qt(double, double);
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extern double rt(double);
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extern double dunif(double, double, double);
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extern double punif(double, double, double);
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extern double qunif(double, double, double);
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extern double runif(double, double);
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extern double dweibull(double, double, double);
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extern double pweibull(double, double, double);
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extern double qweibull(double, double, double);
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extern double rweibull(double, double);
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extern int errno;
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#endif
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