1 /*- 2 * Copyright (c) 2016 Jilles Tjoelker <jilles@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <assert.h> 31 #include <stdio.h> 32 #include <stdlib.h> 33 #include <string.h> 34 35 #include <atf-c.h> 36 37 ATF_TC_WITHOUT_HEAD(zero); 38 ATF_TC_BODY(zero, tc) 39 { 40 41 assert(memcmp("a", "b", 0) == 0); 42 assert(memcmp("", "", 0) == 0); 43 } 44 45 ATF_TC_WITHOUT_HEAD(eq); 46 ATF_TC_BODY(eq, tc) 47 { 48 unsigned char data1[256], data2[256]; 49 int i; 50 51 for (i = 0; i < 256; i++) 52 data1[i] = data2[i] = i ^ 0x55; 53 for (i = 1; i < 256; i++) 54 assert(memcmp(data1, data2, i) == 0); 55 for (i = 1; i < 256; i++) 56 assert(memcmp(data1 + i, data2 + i, 256 - i) == 0); 57 } 58 59 ATF_TC_WITHOUT_HEAD(neq); 60 ATF_TC_BODY(neq, tc) 61 { 62 unsigned char data1[256], data2[256]; 63 int i; 64 65 for (i = 0; i < 256; i++) { 66 data1[i] = i; 67 data2[i] = i ^ 0x55; 68 } 69 for (i = 1; i < 256; i++) 70 assert(memcmp(data1, data2, i) != 0); 71 for (i = 1; i < 256; i++) 72 assert(memcmp(data1 + i, data2 + i, 256 - i) != 0); 73 } 74 75 ATF_TC_WITHOUT_HEAD(diff); 76 ATF_TC_BODY(diff, tc) 77 { 78 unsigned char data1[256], data2[256]; 79 int i; 80 81 memset(data1, 'a', sizeof(data1)); 82 memset(data2, 'a', sizeof(data2)); 83 data1[128] = 255; 84 data2[128] = 0; 85 for (i = 1; i < 66; i++) { 86 assert(memcmp(data1 + 128, data2 + 128, i) == 255); 87 assert(memcmp(data2 + 128, data1 + 128, i) == -255); 88 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i) == 255); 89 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i) == -255); 90 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i * 2) == 255); 91 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i * 2) == -255); 92 } 93 data1[128] = 'c'; 94 data2[128] = 'e'; 95 for (i = 1; i < 66; i++) { 96 assert(memcmp(data1 + 128, data2 + 128, i) == -2); 97 assert(memcmp(data2 + 128, data1 + 128, i) == 2); 98 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i) == -2); 99 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i) == 2); 100 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i * 2) == -2); 101 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i * 2) == 2); 102 } 103 memset(data1 + 129, 'A', sizeof(data1) - 129); 104 memset(data2 + 129, 'Z', sizeof(data2) - 129); 105 for (i = 1; i < 66; i++) { 106 assert(memcmp(data1 + 128, data2 + 128, i) == -2); 107 assert(memcmp(data2 + 128, data1 + 128, i) == 2); 108 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i) == -2); 109 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i) == 2); 110 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i * 2) == -2); 111 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i * 2) == 2); 112 } 113 } 114 115 ATF_TP_ADD_TCS(tp) 116 { 117 118 ATF_TP_ADD_TC(tp, zero); 119 ATF_TP_ADD_TC(tp, eq); 120 ATF_TP_ADD_TC(tp, neq); 121 ATF_TP_ADD_TC(tp, diff); 122 123 return (atf_no_error()); 124 } 125