t_swab.c revision 1.3 
1/*	$NetBSD: t_swab.c,v 1.3 2022/12/28 15:34:19 riastradh 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{
44	size_t i;
45
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	if (n & 1)
51		a[n - 1] = b[n - 1] = (char)~1;
52	for (; n < MAXCHK; n++)
53		a[n] = b[n] = (char)~0;
54}
55
56static void
57dump(const char *f, char *b, size_t l)
58{
59
60	printf("%s ", f);
61	while (l--)
62		printf("%.2x ", (unsigned char)*b++);
63	printf("\n");
64}
65
66ATF_TC(swab_basic);
67ATF_TC_HEAD(swab_basic, tc)
68{
69
70	atf_tc_set_md_var(tc, "descr", "Test swab results");
71}
72
73ATF_TC_BODY(swab_basic, tc)
74{
75	char a[MAXCHK], b[MAXCHK], r[MAXCHK];
76	size_t i;
77	bool failed = false;
78
79	for (i = 0; i < MAXCHK; i++) {
80		build(a, b, i);
81		(void)memset(r, ~0, MAXCHK);
82		swab(a, r, i);
83		if (i & 1)	/* last byte unspecified if odd length */
84			r[i - 1] = (char )~1;
85		if (memcmp(b, r, MAXCHK) != 0) {
86			printf("pattern mismatch at %zu bytes\n", i);
87			dump("expect:", b, MAXCHK);
88			dump("result:", r, MAXCHK);
89			failed = true;
90		}
91	}
92	if (failed)
93		atf_tc_fail_nonfatal("Check stdout for details");
94}
95
96ATF_TP_ADD_TCS(tp)
97{
98	ATF_TP_ADD_TC(tp, swab_basic);
99
100	return atf_no_error();
101}
102