1 /*- 2 * Copyright (c) 2016 Jilles Tjoelker <[email protected]> 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 <assert.h> 28 #include <stdio.h> 29 #include <stdlib.h> 30 #include <string.h> 31 32 #include <atf-c.h> 33 34 ATF_TC_WITHOUT_HEAD(zero); 35 ATF_TC_BODY(zero, tc) 36 { 37 38 assert(memcmp("a", "b", 0) == 0); 39 assert(memcmp("", "", 0) == 0); 40 } 41 42 ATF_TC_WITHOUT_HEAD(eq); 43 ATF_TC_BODY(eq, tc) 44 { 45 unsigned char data1[256], data2[256]; 46 int i; 47 48 for (i = 0; i < 256; i++) 49 data1[i] = data2[i] = i ^ 0x55; 50 for (i = 1; i < 256; i++) 51 assert(memcmp(data1, data2, i) == 0); 52 for (i = 1; i < 256; i++) 53 assert(memcmp(data1 + i, data2 + i, 256 - i) == 0); 54 } 55 56 ATF_TC_WITHOUT_HEAD(neq); 57 ATF_TC_BODY(neq, tc) 58 { 59 unsigned char data1[256], data2[256]; 60 int i; 61 62 for (i = 0; i < 256; i++) { 63 data1[i] = i; 64 data2[i] = i ^ 0x55; 65 } 66 for (i = 1; i < 256; i++) 67 assert(memcmp(data1, data2, i) != 0); 68 for (i = 1; i < 256; i++) 69 assert(memcmp(data1 + i, data2 + i, 256 - i) != 0); 70 } 71 72 ATF_TC_WITHOUT_HEAD(diff); 73 ATF_TC_BODY(diff, tc) 74 { 75 unsigned char data1[256], data2[256]; 76 int i; 77 78 memset(data1, 'a', sizeof(data1)); 79 memset(data2, 'a', sizeof(data2)); 80 data1[128] = 255; 81 data2[128] = 0; 82 for (i = 1; i < 66; i++) { 83 assert(memcmp(data1 + 128, data2 + 128, i) == 255); 84 assert(memcmp(data2 + 128, data1 + 128, i) == -255); 85 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i) == 255); 86 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i) == -255); 87 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i * 2) == 255); 88 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i * 2) == -255); 89 } 90 data1[128] = 'c'; 91 data2[128] = 'e'; 92 for (i = 1; i < 66; i++) { 93 assert(memcmp(data1 + 128, data2 + 128, i) == -2); 94 assert(memcmp(data2 + 128, data1 + 128, i) == 2); 95 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i) == -2); 96 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i) == 2); 97 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i * 2) == -2); 98 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i * 2) == 2); 99 } 100 memset(data1 + 129, 'A', sizeof(data1) - 129); 101 memset(data2 + 129, 'Z', sizeof(data2) - 129); 102 for (i = 1; i < 66; i++) { 103 assert(memcmp(data1 + 128, data2 + 128, i) == -2); 104 assert(memcmp(data2 + 128, data1 + 128, i) == 2); 105 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i) == -2); 106 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i) == 2); 107 assert(memcmp(data1 + 129 - i, data2 + 129 - i, i * 2) == -2); 108 assert(memcmp(data2 + 129 - i, data1 + 129 - i, i * 2) == 2); 109 } 110 } 111 112 ATF_TP_ADD_TCS(tp) 113 { 114 115 ATF_TP_ADD_TC(tp, zero); 116 ATF_TP_ADD_TC(tp, eq); 117 ATF_TP_ADD_TC(tp, neq); 118 ATF_TP_ADD_TC(tp, diff); 119 120 return (atf_no_error()); 121 } 122