Rev 1618 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* @(#)w_atan2.c 5.1 93/09/24 */ |
| 2 | /* |
||
| 3 | * ==================================================== |
||
| 4 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
||
| 5 | * |
||
| 6 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
||
| 7 | * Permission to use, copy, modify, and distribute this |
||
| 8 | * software is freely granted, provided that this notice |
||
| 9 | * is preserved. |
||
| 10 | * ==================================================== |
||
| 11 | */ |
||
| 12 | |||
| 13 | #ifndef lint |
||
| 14 | static char rcsid[] = "$\Id: w_atan2.c,v 1.2 1995/05/30 05:50:43 rgrimes Exp $"; |
||
| 15 | #endif |
||
| 16 | |||
| 17 | /* |
||
| 18 | * wrapper atan2(y,x) |
||
| 19 | */ |
||
| 20 | |||
| 21 | #include "math.h" |
||
| 22 | #include "math_private.h" |
||
| 23 | |||
| 24 | |||
| 25 | #ifdef __STDC__ |
||
| 26 | double atan2(double y, double x) /* wrapper atan2 */ |
||
| 27 | #else |
||
| 28 | double atan2(y,x) /* wrapper atan2 */ |
||
| 29 | double y,x; |
||
| 30 | #endif |
||
| 31 | { |
||
| 32 | #ifdef _IEEE_LIBM |
||
| 33 | return __ieee754_atan2(y,x); |
||
| 34 | #else |
||
| 35 | double z; |
||
| 36 | z = __ieee754_atan2(y,x); |
||
| 37 | if(_LIB_VERSION == _IEEE_||isnan(x)||isnan(y)) return z; |
||
| 38 | if(x==0.0&&y==0.0) { |
||
| 39 | return __kernel_standard(y,x,3); /* atan2(+-0,+-0) */ |
||
| 40 | } else |
||
| 41 | return z; |
||
| 42 | #endif |
||
| 43 | } |