1 | /* Test and measure memrchr functions. |
2 | Copyright (C) 2013-2024 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #define TEST_MAIN |
20 | #define TEST_NAME "memrchr" |
21 | #include "test-string.h" |
22 | |
23 | typedef char *(*proto_t) (const char *, int, size_t); |
24 | |
25 | IMPL (memrchr, 1) |
26 | |
27 | /* Also check the generic implementation. */ |
28 | #undef weak_alias |
29 | #define weak_alias(a, b) |
30 | #define MEMRCHR __memrchr_default |
31 | #include "string/memrchr.c" |
32 | IMPL (__memrchr_default, 1) |
33 | |
34 | /* Naive implementation to verify results. */ |
35 | char * |
36 | simple_memrchr (const char *s, int c, size_t n) |
37 | { |
38 | s = s + n; |
39 | while (n--) |
40 | if (*--s == (char) c) |
41 | return (char *) s; |
42 | return NULL; |
43 | } |
44 | |
45 | static void |
46 | do_one_test (impl_t *impl, const char *s, int c, size_t n, char *exp_res) |
47 | { |
48 | char *res = CALL (impl, s, c, n); |
49 | if (res != exp_res) |
50 | { |
51 | error (status: 0, errnum: 0, format: "Wrong result in function %s %p %p" , impl->name, |
52 | res, exp_res); |
53 | ret = 1; |
54 | return; |
55 | } |
56 | } |
57 | |
58 | static void |
59 | do_test (size_t align, size_t pos, size_t len, int seek_char) |
60 | { |
61 | size_t i; |
62 | char *result; |
63 | |
64 | align &= 7; |
65 | if (align + len >= page_size) |
66 | return; |
67 | |
68 | for (i = 0; i < len; ++i) |
69 | { |
70 | buf1[align + i] = 1 + 23 * i % 127; |
71 | if (buf1[align + i] == seek_char) |
72 | buf1[align + i] = seek_char + 1; |
73 | } |
74 | buf1[align + len] = 0; |
75 | |
76 | if (pos < len) |
77 | { |
78 | buf1[align + pos] = seek_char; |
79 | buf1[align + len] = -seek_char; |
80 | result = (char *) (buf1 + align + pos); |
81 | } |
82 | else |
83 | { |
84 | result = NULL; |
85 | buf1[align + len] = seek_char; |
86 | } |
87 | |
88 | FOR_EACH_IMPL (impl, 0) |
89 | do_one_test (impl, s: (char *) (buf1 + align), c: seek_char, n: len, exp_res: result); |
90 | } |
91 | |
92 | static void |
93 | do_random_tests (void) |
94 | { |
95 | size_t i, j, n, align, pos, len; |
96 | int seek_char; |
97 | char *result; |
98 | unsigned char *p = buf1 + page_size - 512; |
99 | |
100 | for (n = 0; n < ITERATIONS; n++) |
101 | { |
102 | align = random () & 15; |
103 | pos = random () & 511; |
104 | if (pos + align >= 512) |
105 | pos = 511 - align - (random () & 7); |
106 | len = random () & 511; |
107 | if (pos >= len) |
108 | len = pos + (random () & 7); |
109 | if (len + align >= 512) |
110 | len = 512 - align - (random () & 7); |
111 | seek_char = random () & 255; |
112 | j = len + align + 64; |
113 | if (j > 512) |
114 | j = 512; |
115 | |
116 | for (i = 0; i < j; i++) |
117 | { |
118 | if (i == pos + align) |
119 | p[i] = seek_char; |
120 | else |
121 | { |
122 | p[i] = random () & 255; |
123 | if (p[i] == seek_char) |
124 | p[i] = seek_char + 13; |
125 | } |
126 | } |
127 | |
128 | if (pos < len) |
129 | result = (char *) (p + pos + align); |
130 | else |
131 | result = NULL; |
132 | |
133 | FOR_EACH_IMPL (impl, 1) |
134 | if (CALL (impl, (char *) (p + align), seek_char, len) != result) |
135 | { |
136 | error (status: 0, errnum: 0, format: "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p" , |
137 | n, impl->name, align, seek_char, len, pos, |
138 | CALL (impl, (char *) (p + align), seek_char, len), |
139 | result, p); |
140 | ret = 1; |
141 | } |
142 | } |
143 | } |
144 | |
145 | int |
146 | test_main (void) |
147 | { |
148 | size_t i; |
149 | |
150 | test_init (); |
151 | |
152 | printf (format: "%20s" , "" ); |
153 | FOR_EACH_IMPL (impl, 0) |
154 | printf (format: "\t%s" , impl->name); |
155 | putchar (c: '\n'); |
156 | |
157 | for (i = 1; i < 8; ++i) |
158 | { |
159 | /* Test len == 0. */ |
160 | do_test (align: i, pos: i, len: 0, seek_char: 0); |
161 | do_test (align: i, pos: i, len: 0, seek_char: 23); |
162 | |
163 | do_test (align: 0, pos: 16 << i, len: 2048, seek_char: 23); |
164 | do_test (align: i, pos: 64, len: 256, seek_char: 23); |
165 | do_test (align: 0, pos: 16 << i, len: 2048, seek_char: 0); |
166 | do_test (align: i, pos: 64, len: 256, seek_char: 0); |
167 | |
168 | do_test (align: 0, pos: i, len: 256, seek_char: 23); |
169 | do_test (align: 0, pos: i, len: 256, seek_char: 0); |
170 | do_test (align: i, pos: i, len: 256, seek_char: 23); |
171 | do_test (align: i, pos: i, len: 256, seek_char: 0); |
172 | |
173 | } |
174 | for (i = 1; i < 32; ++i) |
175 | { |
176 | do_test (align: 0, pos: i, len: i + 1, seek_char: 23); |
177 | do_test (align: 0, pos: i, len: i + 1, seek_char: 0); |
178 | do_test (align: i, pos: i, len: i + 1, seek_char: 23); |
179 | do_test (align: i, pos: i, len: i + 1, seek_char: 0); |
180 | |
181 | do_test (align: 0, pos: 1, len: i + 1, seek_char: 23); |
182 | do_test (align: 0, pos: 2, len: i + 1, seek_char: 0); |
183 | do_test (align: i, pos: 1, len: i + 1, seek_char: 23); |
184 | do_test (align: i, pos: 2, len: i + 1, seek_char: 0); |
185 | } |
186 | |
187 | do_random_tests (); |
188 | return ret; |
189 | } |
190 | |
191 | #include <support/test-driver.c> |
192 | |