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| 2 | /* @(#)w_remainder.c 5.1 93/09/24 */
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| 3 | /*
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| 4 | * ====================================================
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| 5 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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| 6 | *
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| 7 | * Developed at SunPro, a Sun Microsystems, Inc. business.
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| 8 | * Permission to use, copy, modify, and distribute this
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| 9 | * software is freely granted, provided that this notice
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| 10 | * is preserved.
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| 11 | * ====================================================
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| 12 | */
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| 13 |
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| 14 | /*
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| 15 | FUNCTION
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| 16 | <<rint>>, <<rintf>>, <<remainder>>, <<remainderf>>---round and remainder
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| 17 | INDEX
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| 18 | rint
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| 19 | INDEX
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| 20 | rintf
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| 21 | INDEX
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| 22 | remainder
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| 23 | INDEX
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| 24 | remainderf
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| 25 |
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| 26 | ANSI_SYNOPSIS
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| 27 | #include <math.h>
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| 28 | double rint(double <[x]>);
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| 29 | float rintf(float <[x]>);
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| 30 | double remainder(double <[x]>, double <[y]>);
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| 31 | float remainderf(float <[x]>, float <[y]>);
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| 32 |
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| 33 | TRAD_SYNOPSIS
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| 34 | #include <math.h>
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| 35 | double rint(<[x]>)
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| 36 | double <[x]>;
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| 37 | float rintf(<[x]>)
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| 38 | float <[x]>;
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| 39 | double remainder(<[x]>,<[y]>)
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| 40 | double <[x]>, <[y]>;
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| 41 | float remainderf(<[x]>,<[y]>)
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| 42 | float <[x]>, <[y]>;
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| 43 |
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| 44 | DESCRIPTION
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| 45 | <<rint>> and <<rintf>> returns their argument rounded to the nearest
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| 46 | integer. <<remainder>> and <<remainderf>> find the remainder of
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| 47 | <[x]>/<[y]>; this value is in the range -<[y]>/2 .. +<[y]>/2.
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| 48 |
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| 49 | RETURNS
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| 50 | <<rint>> and <<remainder>> return the integer result as a double.
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| 51 |
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| 52 | PORTABILITY
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| 53 | <<rint>> and <<remainder>> are System V release 4. <<rintf>> and
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| 54 | <<remainderf>> are extensions.
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| 55 |
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| 56 | */
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| 57 |
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| 58 | /*
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| 59 | * wrapper remainder(x,p)
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| 60 | */
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| 61 |
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| 62 | #include "fdlibm.h"
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| 63 | #include <errno.h>
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| 64 |
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| 65 | #ifndef _DOUBLE_IS_32BITS
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| 66 |
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| 67 | #ifdef __STDC__
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| 68 | double remainder(double x, double y) /* wrapper remainder */
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| 69 | #else
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| 70 | double remainder(x,y) /* wrapper remainder */
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| 71 | double x,y;
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| 72 | #endif
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| 73 | {
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| 74 | #ifdef _IEEE_LIBM
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| 75 | return __ieee754_remainder(x,y);
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| 76 | #else
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| 77 | double z;
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| 78 | struct exception exc;
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| 79 | z = __ieee754_remainder(x,y);
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| 80 | if(_LIB_VERSION == _IEEE_ || isnan(y)) return z;
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| 81 | if(y==0.0) {
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| 82 | /* remainder(x,0) */
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| 83 | exc.type = DOMAIN;
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| 84 | exc.name = "remainder";
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| 85 | exc.err = 0;
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| 86 | exc.arg1 = x;
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| 87 | exc.arg2 = y;
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| 88 | exc.retval = 0.0/0.0;
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| 89 | if (_LIB_VERSION == _POSIX_)
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| 90 | errno = EDOM;
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| 91 | else if (!matherr(&exc)) {
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| 92 | errno = EDOM;
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| 93 | }
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| 94 | if (exc.err != 0)
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| 95 | errno = exc.err;
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| 96 | return exc.retval;
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| 97 | } else
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| 98 | return z;
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| 99 | #endif
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| 100 | }
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| 101 |
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| 102 | #endif /* defined(_DOUBLE_IS_32BITS) */
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