1 /* @(#)w_hypot.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 #if defined(LIBM_SCCS) && !defined(lint) 14 static char rcsid[] = "$Id: w_hypot.c,v 1.5 1994/09/22 16:45:42 jtc Exp $"; 15 #endif 16 17 /* 18 * wrapper hypot(x,y) 19 */ 20 21 #include "math.h" 22 #include "math_private.h" 23 24 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 31 { 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 43 } 44