1 /* $NetBSD: t_strpct.c,v 1.2 2025/05/03 07:22:52 rillig Exp $ */ 2 3 /* 4 * Copyright (c) 2025 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code was contributed to The NetBSD Foundation by Roland Illig. 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 31 #include <sys/cdefs.h> 32 __COPYRIGHT("@(#) Copyright (c) 2025\ 33 The NetBSD Foundation, inc. All rights reserved."); 34 __RCSID("$NetBSD: t_strpct.c,v 1.2 2025/05/03 07:22:52 rillig Exp $"); 35 36 #include <stdbool.h> 37 #include <stdint.h> 38 #include <stdio.h> 39 #include <string.h> 40 #include <util.h> 41 42 #include <atf-c.h> 43 44 static void 45 check_strspct(const char *file, unsigned line, 46 size_t bufsiz, intmax_t num, intmax_t den, size_t digits, 47 const char *want) 48 { 49 char buf[128]; 50 51 ATF_REQUIRE_MSG(bufsiz < sizeof(buf) - 2, "bufsiz too large"); 52 memset(buf, '>', sizeof(buf)); 53 buf[0] = '<'; 54 buf[sizeof(buf) - 1] = '\0'; 55 56 const char *have = strspct(buf + 1, bufsiz, num, den, digits); 57 58 ATF_REQUIRE_MSG(buf[0] == '<', 59 "out-of-bounds write before"); 60 ATF_REQUIRE_MSG(buf[1 + bufsiz] == '>', 61 "out-of-bounds write after"); 62 ATF_REQUIRE_MSG(have == buf + 1, 63 "have != buf"); 64 ATF_CHECK_MSG(bufsiz > 0 ? strcmp(have, want) == 0 : true, 65 "%s:%u: want \"%s\", have \"%s\"", 66 file, line, want, have); 67 } 68 69 #define h_strspct(bufsiz, num, den, digits, want) \ 70 check_strspct(__FILE__, __LINE__, bufsiz, num, den, digits, want) 71 72 static void 73 check_strpct(const char *file, unsigned line, 74 size_t bufsiz, uintmax_t num, uintmax_t den, size_t digits, 75 const char *want) 76 { 77 char buf[128]; 78 79 ATF_REQUIRE_MSG(bufsiz < sizeof(buf) - 2, "bufsiz too large"); 80 memset(buf, '>', sizeof(buf)); 81 buf[0] = '<'; 82 buf[sizeof(buf) - 1] = '\0'; 83 84 const char *have = strpct(buf + 1, bufsiz, num, den, digits); 85 86 ATF_REQUIRE_MSG(buf[0] == '<', 87 "out-of-bounds write before"); 88 ATF_REQUIRE_MSG(buf[1 + bufsiz] == '>', 89 "out-of-bounds write after"); 90 ATF_REQUIRE_MSG(have == buf + 1, 91 "have != buf"); 92 ATF_CHECK_MSG(bufsiz > 0 ? strcmp(have, want) == 0 : true, 93 "%s:%u: want \"%s\", have \"%s\"", 94 file, line, want, have); 95 } 96 97 #define h_strpct(bufsiz, num, den, digits, want) \ 98 check_strpct(__FILE__, __LINE__, bufsiz, num, den, digits, want) 99 100 ATF_TC(strspct); 101 ATF_TC_HEAD(strspct, tc) 102 { 103 atf_tc_set_md_var(tc, "descr", "Checks strspct(3)"); 104 } 105 ATF_TC_BODY(strspct, tc) 106 { 107 108 // Very small buffers. 109 h_strspct(0, 0, 0, 0, ""); 110 h_strspct(1, 0, 0, 0, ""); 111 112 // Small buffers. 113 h_strspct(2, 1, 40, 0, "2"); 114 h_strspct(3, 1, 40, 0, "2"); 115 h_strspct(3, 1, 40, 1, "2."); 116 h_strspct(4, 1, 40, 1, "2.5"); 117 h_strspct(4, 8, 40, 1, "20."); 118 h_strspct(6, 1, 5, 1, "20.0"); 119 h_strspct(100, 1, 5, 5, "20.00000"); 120 h_strspct( 5, 11223344, 100, 10, "1122"); 121 h_strspct(10, 11223344, 100, 10, "11223344."); 122 h_strspct(11, 11223344, 100, 10, "11223344.0"); 123 124 // Small buffers with negative numbers. 125 h_strspct(1, -1, 40, 0, ""); 126 h_strspct(2, -1, 40, 0, "-"); 127 h_strspct(3, -1, 40, 0, "-2"); 128 h_strspct(3, -1, 40, 1, "-2"); 129 h_strspct(4, -1, 40, 1, "-2."); 130 h_strspct(5, -1, 40, 1, "-2.5"); 131 h_strspct(4, -8, 40, 1, "-20"); 132 h_strspct(5, -8, 40, 1, "-20."); 133 h_strspct(6, -1, 5, 1, "-20.0"); 134 h_strspct(100, -1, 5, 5, "-20.00000"); 135 h_strspct( 5, -11223344, 100, 10, "-112"); 136 h_strspct(10, -11223344, 100, 10, "-11223344"); 137 h_strspct(11, -11223344, 100, 10, "-11223344."); 138 h_strspct(12, -11223344, 100, 10, "-11223344.0"); 139 140 // Percentages are always rounded towards zero. 141 h_strspct(6, 1, 6, 1, "16.6"); 142 h_strspct(7, -1, 6, 1, "-16.6"); 143 h_strspct(7, 1, -6, 1, "-16.6"); 144 h_strspct(7, -1, -6, 1, "16.6"); 145 h_strspct(100, 1, 7, 20, "14.28571428571428571428"); 146 147 // Big numbers. 148 h_strspct(100, INTMAX_MAX, INTMAX_MAX, 0, "100"); 149 h_strspct(100, INTMAX_MIN, INTMAX_MIN, 25, "100.0000000000000000000000000"); 150 h_strspct(100, INTMAX_MIN, INTMAX_MAX, 25, "-100.0000000000000000108420217"); 151 h_strspct(100, INTMAX_MAX, INTMAX_MIN, 25, "-99.9999999999999999891579782"); 152 h_strspct(100, INTMAX_MAX, INTMAX_MAX, 25, "100.0000000000000000000000000"); 153 } 154 155 ATF_TC(strpct); 156 ATF_TC_HEAD(strpct, tc) 157 { 158 atf_tc_set_md_var(tc, "descr", "Checks strpct(3)"); 159 } 160 ATF_TC_BODY(strpct, tc) 161 { 162 163 // Small buffers. 164 h_strpct(0, 0, 0, 0, ""); 165 h_strpct(1, 0, 0, 0, ""); 166 h_strpct(2, 0, 0, 0, "0"); 167 h_strpct(3, 0, 0, 0, "0"); 168 h_strpct(3, 0, 0, 1, "0."); 169 h_strpct(4, 0, 0, 1, "0.0"); 170 h_strpct(4, 1, 5, 1, "20."); 171 h_strpct(6, 1, 5, 1, "20.0"); 172 h_strpct(100, 1, 5, 5, "20.00000"); 173 174 h_strpct(100, 1, 7, 20, "14.28571428571428571428"); 175 176 h_strpct( 5, 11223344, 100, 10, "1122"); 177 h_strpct(10, 11223344, 100, 10, "11223344."); 178 h_strpct(11, 11223344, 100, 10, "11223344.0"); 179 180 h_strpct(100, UINTMAX_MAX, UINTMAX_MAX, 0, "100"); 181 h_strpct(100, UINTMAX_MAX, UINTMAX_MAX, 1, "100.0"); 182 h_strpct(100, UINTMAX_MAX, UINTMAX_MAX, 5, "100.00000"); 183 h_strpct(100, UINTMAX_MAX, UINTMAX_MAX, 10, "100.0000000000"); 184 h_strpct(100, UINTMAX_MAX, UINTMAX_MAX, 15, "100.000000000000000"); 185 h_strpct(100, UINTMAX_MAX, UINTMAX_MAX, 20, "100.00000000000000000000"); 186 h_strpct(100, UINTMAX_MAX, UINTMAX_MAX, 25, "100.0000000000000000000000000"); 187 188 h_strpct(100, UINTMAX_MAX - 1, UINTMAX_MAX, 25, "99.9999999999999999945789891"); 189 h_strpct(100, 1, (UINTMAX_MAX >> 1) + 1, 70, 190 "0.0000000000000000108420217248550443400745280086994171142578125000000000"); 191 h_strpct(100, UINTMAX_MAX, 1, 10, "1844674407370955161500.0000000000"); 192 h_strpct(100, 1, UINTMAX_MAX, 30, "0.000000000000000005421010862427"); 193 } 194 195 ATF_TP_ADD_TCS(tp) 196 { 197 198 ATF_TP_ADD_TC(tp, strspct); 199 ATF_TP_ADD_TC(tp, strpct); 200 201 return atf_no_error(); 202 } 203
Indexes created Sat Sep 20 22:09:52 GMT 2025