2.5-18.1

math/w_atan2.c

@@ -0,0 +1,47 @@
+/* @(#)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 != _SVID_||__isnan(x)||__isnan(y)) return z;
+	if(x==0.0&&y==0.0)
+	  return __kernel_standard(y,x,3); /* atan2(+-0,+-0) */
+	return z;
+#endif
+}
+weak_alias (__atan2, atan2)
+#ifdef NO_LONG_DOUBLE
+strong_alias (__atan2, __atan2l)
+weak_alias (__atan2, atan2l)
+#endif