mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-27 03:41:23 +08:00
45 lines
1.0 KiB
C
45 lines
1.0 KiB
C
|
/* @(#)w_atan2.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.
|
||
|
|
* ====================================================
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
||
|
|
static char rcsid[] = "$NetBSD: w_atan2.c,v 1.6 1995/05/10 20:48:39 jtc Exp $";
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* wrapper atan2(y,x)
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "math.h"
|
||
|
|
#include "math_private.h"
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef __STDC__
|
||
|
|
double __atan2(double y, double x) /* wrapper atan2 */
|
||
|
|
#else
|
||
|
|
double __atan2(y,x) /* wrapper atan2 */
|
||
|
|
double y,x;
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
#ifdef _IEEE_LIBM
|
||
|
|
return __ieee754_atan2(y,x);
|
||
|
|
#else
|
||
|
|
double z;
|
||
|
|
z = __ieee754_atan2(y,x);
|
||
|
|
if(_LIB_VERSION == _IEEE_||__isnan(x)||__isnan(y)) return z;
|
||
|
|
if(x==0.0&&y==0.0) {
|
||
|
|
return __kernel_standard(y,x,3); /* atan2(+-0,+-0) */
|
||
|
|
} else
|
||
|
|
return z;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
weak_alias (__atan2, atan2)
|