/*
 *  math.h	Math functions
 *
 *  Copyright by WATCOM International Corp. 1988-1996.  All rights reserved.
 */
#ifndef _MATH_H_INCLUDED
#ifdef __cplusplus
extern "C" {
#endif
#if __WATCOMC__ > 1000
#pragma pack(__push,1);
#else
#pragma pack(1);
#endif

/* macros for MS compatibility */
#ifndef _CRTAPI1
 #define _CRTAPI1
#endif
#ifndef _CRTAPI2
 #define _CRTAPI2
#endif
#ifndef _CRTIMP
 #define _CRTIMP
#endif

#ifdef M_I86HM
extern	const double __far  _HugeValue;
#else
extern	const double __near _HugeValue;
#endif
#define HUGE_VAL	_HugeValue

extern double	acos( double __x );
extern double	asin( double __x );
extern double	atan( double __x );
extern double	atan2( double __y, double __x );
extern double	ceil( double __x );
extern double	cos( double __x );
extern double	cosh( double __x );
extern double	exp( double __x );
extern double	fabs( double __x );
extern double	floor( double __x );
extern double	fmod( double __x, double __y );
extern double	frexp( double __value, int *__exp );
extern double	ldexp( double __x, int __exp );
extern double	log( double __x );
extern double	log10( double __x );
extern double	modf( double __value, double *__iptr );
extern double	pow( double __x, double __y );
extern double	sin( double __x );
extern double	sinh( double __x );
extern double	sqrt( double __x );
extern double	tan( double __x );
extern double	tanh( double __x );

/* non-ANSI */
#if !defined(NO_EXT_KEYS) /* extensions enabled */

struct _complex {
	double	x;
	double	y;
};
#ifndef __cplusplus
struct complex {
	double	x;
	double	y;
};
#endif

extern double	acosh( double __x );
extern double	asinh( double __x );
extern double	atanh( double __x );
extern double	cabs( struct _complex );
extern double	hypot( double __x, double __y );
extern double	j0( double __x );
extern double	j1( double __x );
extern double	jn( int __n, double __x );
extern double	log2( double __x );
extern double	y0( double __x );
extern double	y1( double __x );
extern double	yn( int __n, double __x );

/* The following struct is used to record errors detected in the math library.
 * matherr is called with a pointer to this struct for possible error recovery.
 */

struct	exception {
	int	type;		/* type of error, see below */
	char	*name;		/* name of math function */
	double	arg1;		/* value of first argument to function */
	double	arg2;		/* second argument (if indicated) */
	double	retval; 	/* default return value */
};

#define DOMAIN		1	/* argument domain error */
#define SING		2	/* argument singularity  */
#define OVERFLOW	3	/* overflow range error  */
#define UNDERFLOW	4	/* underflow range error */
#define TLOSS		5	/* total loss of significance */
#define PLOSS		6	/* partial loss of significance */

extern int	matherr( struct exception * );
extern double	_matherr( struct exception * );
#endif /* EXTENSIONS */


#ifndef __NO_MATH_OPS
/*
    Defining the __NO_MATH_OPS macro will stop the compiler from recogizing
    the following functions as intrinsic operators.
*/
    #pragma intrinsic(log,cos,sin,tan,sqrt,fabs,pow,atan2,fmod)
    #pragma intrinsic(acos,asin,atan,cosh,exp,log10,sinh,tanh)
#endif
#if __WATCOMC__ > 1000
#pragma pack(__pop);
#else
#pragma pack();
#endif
#define _MATH_H_INCLUDED
#ifdef __cplusplus
};
#endif
#endif
