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/*
 *  Mathlib : A C Library of Special Functions
 *  Copyright (C) 1998-2000  The R Development Core Team
 *
 *  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  02111-1307  USA
 *
 */

/* Private header file for use during compilation of Mathlib */
#ifndef MATHLIB_PRIVATE_H
#define MATHLIB_PRIVATE_H

#include <Rconfig.h>
#define MATHLIB_PRIVATE
#include "R_ext/Mathlib.h"
#undef  MATHLIB_PRIVATE
#include "R_ext/RS.h"

#ifndef MATHLIB_STANDALONE
/* Mathlib in R */

#include "R_ext/Error.h"
# define MATHLIB_ERROR(fmt,x)       error(fmt,x);
# define MATHLIB_WARNING(fmt,x)     warning(fmt,x)
# define MATHLIB_WARNING2(fmt,x,x2) warning(fmt,x,x2)
# define MATHLIB_WARNING3(fmt,x,x2,x3)  warning(fmt,x,x2,x3)
# define MATHLIB_WARNING4(fmt,x,x2,x3,x4) warning(fmt,x,x2,x3,x4)

#include "R_ext/Arith.h"
#define ML_POSINF   R_PosInf
#define ML_NEGINF   R_NegInf
#define ML_NAN      R_NaN

#ifdef IEEE_754
#define ML_ERROR(x) /* nothing */
#define ML_UNDERFLOW    (DBL_MIN * DBL_MIN)
#define ML_VALID(x) (!ISNAN(x))
#else
void ml_error(int n);
#define ML_ERROR(x) ml_error(x)
#define ML_UNDERFLOW    0
#define ML_VALID(x) (errno == 0)
#endif

#else
/* Mathlib standalone */

#include <stdio.h>
# define MATHLIB_ERROR(fmt,x)   { printf(fmt,x); exit(1); }
# define MATHLIB_WARNING(fmt,x)     printf(fmt,x)
# define MATHLIB_WARNING2(fmt,x,x2) printf(fmt,x,x2)
# define MATHLIB_WARNING3(fmt,x,x2,x3)  printf(fmt,x,x2,x3)
# define MATHLIB_WARNING4(fmt,x,x2,x3,x4) printf(fmt,x,x2,x3,x4)

#define ISNAN(x)       R_IsNaNorNA(x)
#define R_FINITE(x)    R_finite(x)
int R_IsNaNorNA(double);
int R_finite(double);

#ifdef IEEE_754
#define ML_POSINF   (1.0 / 0.0)
#define ML_NEGINF   ((-1.0) / 0.0)
#define ML_NAN      (0.0 / 0.0)
#else
#define ML_POSINF   DBL_MAX
#define ML_NEGINF   (-DBL_MAX)
#define ML_NAN      (-DBL_MAX*(1-1e-15))
#endif

#endif /* standalone */

#ifdef IEEE_754
#define ML_ERROR(x) /* nothing */
#define ML_UNDERFLOW    (DBL_MIN * DBL_MIN)
#define ML_VALID(x) (!ISNAN(x))
#else/*--- NO IEEE: No +/-Inf, NAN,... ---*/
void ml_error(int n);
#define ML_ERROR(x) ml_error(x)
#define ML_UNDERFLOW    0
#define ML_VALID(x) (errno == 0)
#endif

#define ME_NONE     0
/*  no error */
#define ME_DOMAIN   1
/*  argument out of domain */
#define ME_RANGE    2
/*  value out of range */
#define ME_NOCONV   4
/*  process did not converge */
#define ME_PRECISION    8
/*  does not have "full" precision */
#define ME_UNDERFLOW    16
/*  and underflow occured (important for IEEE)*/

#define ML_ERR_return_NAN { ML_ERROR(ME_DOMAIN); return ML_NAN; }

/* Wilcoxon Rank Sum Distribution */

#define WILCOX_MAX 50

/* Wilcoxon Signed Rank Distribution */

#define SIGNRANK_MAX 50

/* Formerly private part of Mathlib.h */

/* always remap internal functions */
#define bd0         Rf_bd0
#define chebyshev_eval  Rf_chebyshev_eval
#define chebyshev_init  Rf_chebyshev_init
#define fastchoose  Rf_fastchoose
#define i1mach      Rf_i1mach
#define gammalims   Rf_gammalims
#define lfastchoose Rf_lfastchoose
#define lgammacor   Rf_lgammacor
#define stirlerr        Rf_stirlerr

    /* Chebyshev Series */

int chebyshev_init(double*, int, double);
double  chebyshev_eval(double, const double *, const int);

    /* Gamma and Related Functions */

void    gammalims(double*, double*);
double  lgammacor(double); /* log(gamma) correction */
double  stirlerr(double);  /* Stirling expansion "error" */

double  fastchoose(double, double);
double  lfastchoose(double, double);

double  bd0(double, double);

/* Consider adding these two to the API (Rmath.h): */
double  dbinom_raw(double, double, double, double, int);
double  dpois_raw (double, double, int);
double  pnchisq_raw(double, double, double, double, int);

int i1mach(int);


#endif /* MATHLIB_PRIVATE_H */