| |
| /* @(#)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 |
| <<rint>>, <<rintf>>, <<remainder>>, <<remainderf>>---round and remainder |
| INDEX |
| rint |
| INDEX |
| rintf |
| INDEX |
| remainder |
| INDEX |
| remainderf |
| |
| ANSI_SYNOPSIS |
| #include <math.h> |
| double rint(double <[x]>); |
| float rintf(float <[x]>); |
| double remainder(double <[x]>, double <[y]>); |
| float remainderf(float <[x]>, float <[y]>); |
| |
| TRAD_SYNOPSIS |
| #include <math.h> |
| double rint(<[x]>) |
| double <[x]>; |
| float rintf(<[x]>) |
| float <[x]>; |
| double remainder(<[x]>,<[y]>) |
| double <[x]>, <[y]>; |
| float remainderf(<[x]>,<[y]>) |
| float <[x]>, <[y]>; |
| |
| DESCRIPTION |
| <<rint>> and <<rintf>> returns their argument rounded to the nearest |
| integer. <<remainder>> and <<remainderf>> find the remainder of |
| <[x]>/<[y]>; this value is in the range -<[y]>/2 .. +<[y]>/2. |
| |
| RETURNS |
| <<rint>> and <<remainder>> return the integer result as a double. |
| |
| PORTABILITY |
| <<rint>> and <<remainder>> are System V release 4. <<rintf>> and |
| <<remainderf>> are extensions. |
| |
| */ |
| |
| /* |
| * 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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