xref: /netbsd-src/tests/lib/libm/t_ceil.c (revision b49cc1491953ef2348eff9c84520ffd0678a5c8d)
1 /* $NetBSD: t_ceil.c,v 1.4 2011/07/04 22:33:29 mrg Exp $ */
2 
3 /*-
4  * Copyright (c) 2011 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Jukka Ruohonen.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  */
31 #include <sys/cdefs.h>
32 __RCSID("$NetBSD: t_ceil.c,v 1.4 2011/07/04 22:33:29 mrg Exp $");
33 
34 #include <math.h>
35 #include <limits.h>
36 
37 #include <atf-c.h>
38 
39 ATF_TC(ceil);
40 ATF_TC_HEAD(ceil, tc)
41 {
42 	atf_tc_set_md_var(tc, "descr", "A basic test of ceil(3)");
43 }
44 
45 #ifdef __vax__
46 #define SMALL_NUM	1.0e-38
47 #else
48 #define SMALL_NUM	1.0e-40
49 #endif
50 
51 ATF_TC_BODY(ceil, tc)
52 {
53 	const int n = 10240;
54 	double x, y;
55 	int i;
56 
57 	for (i = 0; i < n; i++) {
58 
59 		x = i + 0.999999999;
60 		y = i + 0.000000001;
61 
62 		ATF_REQUIRE(fabs(ceil(x) - (double)(i + 1)) < SMALL_NUM);
63 		ATF_REQUIRE(fabs(ceil(x) - (double)(i + 1)) < SMALL_NUM);
64 	}
65 }
66 
67 ATF_TP_ADD_TCS(tp)
68 {
69 	ATF_TP_ADD_TC(tp, ceil);
70 
71 	return atf_no_error();
72 }
73