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 #include <assert.h> 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <string.h> 32 33 #include <atf-c.h> 34 35 ATF_TC_WITHOUT_HEAD(zero); 36 ATF_TC_BODY(zero, tc) 37 { 38 39 assert(memcmp("a", "b", 0) == 0); 40 assert(memcmp("", "", 0) == 0); 41 } 42 43 ATF_TC_WITHOUT_HEAD(eq); 44 ATF_TC_BODY(eq, tc) 45 { 46 unsigned char data1[256], data2[256]; 47 int i; 48 49 for (i = 0; i < 256; i++) 50 data1[i] = data2[i] = i ^ 0x55; 51 for (i = 1; i < 256; i++) 52 assert(memcmp(data1, data2, i) == 0); 53 for (i = 1; i < 256; i++) 54 assert(memcmp(data1 + i, data2 + i, 256 - i) == 0); 55 } 56 57 ATF_TC_WITHOUT_HEAD(neq); 58 ATF_TC_BODY(neq, tc) 59 { 60 unsigned char data1[256], data2[256]; 61 int i; 62 63 for (i = 0; i < 256; i++) { 64 data1[i] = i; 65 data2[i] = i ^ 0x55; 66 } 67 for (i = 1; i < 256; i++) 68 assert(memcmp(data1, data2, i) != 0); 69 for (i = 1; i < 256; i++) 70 assert(memcmp(data1 + i, data2 + i, 256 - i) != 0); 71 } 72 73 ATF_TC_WITHOUT_HEAD(diff); 74 ATF_TC_BODY(diff, tc) 75 { 76 unsigned char data1[256], data2[256]; 77 int i; 78 79 memset(data1, 'a', sizeof(data1)); 80 memset(data2, 'a', sizeof(data2)); 81 data1[128] = 255; 82 data2[128] = 0; 83 for (i = 1; i < 66; i++) { 84 assert(memcmp(data1 + 128, data2 + 128, i) == 255); 85 assert(memcmp(data2 + 128, data1 + 128, i) == -255); 86 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i) == 255); 87 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i) == -255); 88 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i * 2) == 255); 89 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i * 2) == -255); 90 } 91 data1[128] = 'c'; 92 data2[128] = 'e'; 93 for (i = 1; i < 66; i++) { 94 assert(memcmp(data1 + 128, data2 + 128, i) == -2); 95 assert(memcmp(data2 + 128, data1 + 128, i) == 2); 96 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i) == -2); 97 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i) == 2); 98 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i * 2) == -2); 99 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i * 2) == 2); 100 } 101 memset(data1 + 129, 'A', sizeof(data1) - 129); 102 memset(data2 + 129, 'Z', sizeof(data2) - 129); 103 for (i = 1; i < 66; i++) { 104 assert(memcmp(data1 + 128, data2 + 128, i) == -2); 105 assert(memcmp(data2 + 128, data1 + 128, i) == 2); 106 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i) == -2); 107 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i) == 2); 108 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i * 2) == -2); 109 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i * 2) == 2); 110 } 111 } 112 113 ATF_TP_ADD_TCS(tp) 114 { 115 116 ATF_TP_ADD_TC(tp, zero); 117 ATF_TP_ADD_TC(tp, eq); 118 ATF_TP_ADD_TC(tp, neq); 119 ATF_TP_ADD_TC(tp, diff); 120 121 return (atf_no_error()); 122 } 123