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t_ceil.c revision 1.4 
      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