xref: /titanic_51/usr/src/lib/libast/common/uwin/rint.c (revision 19d61fc7991644175873937566d932d8cf52912a)
1 /***********************************************************************
2 *                                                                      *
3 *               This software is part of the ast package               *
4 *           Copyright (c) 1985-2007 AT&T Knowledge Ventures            *
5 *                      and is licensed under the                       *
6 *                  Common Public License, Version 1.0                  *
7 *                      by AT&T Knowledge Ventures                      *
8 *                                                                      *
9 *                A copy of the License is available at                 *
10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12 *                                                                      *
13 *              Information and Software Systems Research               *
14 *                            AT&T Research                             *
15 *                           Florham Park NJ                            *
16 *                                                                      *
17 *                 Glenn Fowler <gsf@research.att.com>                  *
18 *                  David Korn <dgk@research.att.com>                   *
19 *                   Phong Vo <kpv@research.att.com>                    *
20 *                                                                      *
21 ***********************************************************************/
22 #include "FEATURE/uwin"
23 
24 #if !_UWIN || _lib_ceil && _lib_floor && _lib_rint
25 
26 void _STUB_rint(){}
27 
28 #else
29 
30 #include <math.h>
31 
32 extern double rint(x)
33 double x;
34 {
35 	double d = floor((x+=.5));
36 	if(d==x && d/2.!=floor(d/2))
37 		d = d-1;
38 	return(d);
39 }
40 
41 #endif
42