.
[glibc/history.git] / math / w_hypot.c
blobab929f78adaf19259fae9b5b18ed880d020c108a
1 /* @(#)w_hypot.c 5.1 93/09/24 */
2 /*
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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 * ====================================================
13 #if defined(LIBM_SCCS) && !defined(lint)
14 static char rcsid[] = "$NetBSD: w_hypot.c,v 1.6 1995/05/10 20:49:07 jtc Exp $";
15 #endif
18 * wrapper hypot(x,y)
21 #include <math.h>
22 #include "math_private.h"
25 #ifdef __STDC__
26 double __hypot(double x, double y)/* wrapper hypot */
27 #else
28 double __hypot(x,y) /* wrapper hypot */
29 double x,y;
30 #endif
32 #ifdef _IEEE_LIBM
33 return __ieee754_hypot(x,y);
34 #else
35 double z;
36 z = __ieee754_hypot(x,y);
37 if(_LIB_VERSION == _IEEE_) return z;
38 if((!__finite(z))&&__finite(x)&&__finite(y))
39 return __kernel_standard(x,y,4); /* hypot overflow */
40 else
41 return z;
42 #endif
44 weak_alias (__hypot, hypot)
45 #ifdef NO_LONG_DOUBLE
46 strong_alias (__hypot, __hypotl)
47 weak_alias (__hypot, hypotl)
48 #endif