📄 w_atan2.c
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/* @(#)w_atan2.c 1.3 95/01/18 *//* * ==================================================== * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. * * Developed at SunSoft, a Sun Microsystems, Inc. business. * Permission to use, copy, modify, and distribute this * software is freely granted, provided that this notice * is preserved. * ==================================================== * *//* * wrapper atan2(y,x) */#include "fdlibm.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}
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