t_swab.c revision 272345 
1/*	$NetBSD: t_swab.c,v 1.2 2011/07/07 08:27:36 jruoho Exp $ */
2
3/*-
4 * Copyright (c) 2001 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code was contributed to The NetBSD Foundation by Christos Zoulas.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30#include <atf-c.h>
31
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h>
35#include <unistd.h>
36
37#include <err.h>
38
39#define MAXCHK	100
40
41static void
42build(char *a, char *b, size_t n) {
43	size_t i;
44
45	n >>= 1;
46	for (i = 0; i < n; i += 2) {
47		b[i+1] = a[i] = (char)i;
48		b[i] = a[i+1] = (char)(i+1);
49	}
50	for (n <<= 1; n < MAXCHK; n++)
51		a[n] = b[n] = (char)~0;
52}
53
54static void
55dump(const char *f, char *b, size_t l)
56{
57
58	printf("%s ", f);
59	while (l--)
60		printf("%.2x ", (unsigned char)*b++);
61	printf("\n");
62}
63
64ATF_TC(swab_basic);
65ATF_TC_HEAD(swab_basic, tc)
66{
67
68	atf_tc_set_md_var(tc, "descr", "Test swab results");
69}
70
71ATF_TC_BODY(swab_basic, tc)
72{
73	char a[MAXCHK], b[MAXCHK], r[MAXCHK];
74	size_t i;
75
76	for (i = 0; i < MAXCHK; i += 2) {
77		build(a, b, i);
78		(void)memset(r, ~0, MAXCHK);
79		swab(a, r, i);
80		if (memcmp(b, r, MAXCHK) != 0) {
81			fprintf(stderr, "pattern mismatch at %lu bytes",
82			    (unsigned long)i);
83			dump("expect:", b, MAXCHK);
84			dump("result:", r, MAXCHK);
85			atf_tc_fail("Check stderr for details");
86		}
87	}
88}
89
90ATF_TP_ADD_TCS(tp)
91{
92	ATF_TP_ADD_TC(tp, swab_basic);
93
94	return atf_no_error();
95}
96