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