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/* @(#)w_remainder.c 5.1 93/09/24 */
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
/*
FUNCTION
<<remainder>>, <<remainderf>>---round and remainder
INDEX
remainder
INDEX
remainderf
ANSI_SYNOPSIS
#include <math.h>
double remainder(double <[x]>, double <[y]>);
float remainderf(float <[x]>, float <[y]>);
TRAD_SYNOPSIS
#include <math.h>
double remainder(<[x]>,<[y]>)
double <[x]>, <[y]>;
float remainderf(<[x]>,<[y]>)
float <[x]>, <[y]>;
DESCRIPTION
<<remainder>> and <<remainderf>> find the remainder of
<[x]>/<[y]>; this value is in the range -<[y]>/2 .. +<[y]>/2.
RETURNS
<<remainder>> returns the integer result as a double.
PORTABILITY
<<remainder>> is a System V release 4.
<<remainderf>> is an extension.
*/
/*
* wrapper remainder(x,p)
*/
#include "fdlibm.h"
#include <errno.h>
#ifndef _DOUBLE_IS_32BITS
#ifdef __STDC__
double remainder(double x, double y) /* wrapper remainder */
#else
double remainder(x,y) /* wrapper remainder */
double x,y;
#endif
{
#ifdef _IEEE_LIBM
return __ieee754_remainder(x,y);
#else
double z;
struct exception exc;
z = __ieee754_remainder(x,y);
if(_LIB_VERSION == _IEEE_ || isnan(y)) return z;
if(y==0.0) {
/* remainder(x,0) */
exc.type = DOMAIN;
exc.name = "remainder";
exc.err = 0;
exc.arg1 = x;
exc.arg2 = y;
exc.retval = 0.0/0.0;
if (_LIB_VERSION == _POSIX_)
errno = EDOM;
else if (!matherr(&exc)) {
errno = EDOM;
}
if (exc.err != 0)
errno = exc.err;
return exc.retval;
} else
return z;
#endif
}
#endif /* defined(_DOUBLE_IS_32BITS) */
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