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 41 static void 42 build(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 56 static void 57 dump(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 66 ATF_TC(swab_basic); 67 ATF_TC_HEAD(swab_basic, tc) 68 { 69 70 atf_tc_set_md_var(tc, "descr", "Test swab results"); 71 } 72 73 ATF_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 96 ATF_TP_ADD_TCS(tp) 97 { 98 ATF_TP_ADD_TC(tp, swab_basic); 99 100 return atf_no_error(); 101 } 102