1 | /* Test and measure memrchr functions. |
2 | Copyright (C) 2013-2022 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 | char *simple_memrchr (const char *, int, size_t); |
25 | |
26 | IMPL (simple_memrchr, 0) |
27 | IMPL (memrchr, 1) |
28 | |
29 | char * |
30 | simple_memrchr (const char *s, int c, size_t n) |
31 | { |
32 | s = s + n; |
33 | while (n--) |
34 | if (*--s == (char) c) |
35 | return (char *) s; |
36 | return NULL; |
37 | } |
38 | |
39 | static void |
40 | do_one_test (impl_t *impl, const char *s, int c, size_t n, char *exp_res) |
41 | { |
42 | char *res = CALL (impl, s, c, n); |
43 | if (res != exp_res) |
44 | { |
45 | error (status: 0, errnum: 0, format: "Wrong result in function %s %p %p" , impl->name, |
46 | res, exp_res); |
47 | ret = 1; |
48 | return; |
49 | } |
50 | } |
51 | |
52 | static void |
53 | do_test (size_t align, size_t pos, size_t len, int seek_char) |
54 | { |
55 | size_t i; |
56 | char *result; |
57 | |
58 | align &= 7; |
59 | if (align + len >= page_size) |
60 | return; |
61 | |
62 | for (i = 0; i < len; ++i) |
63 | { |
64 | buf1[align + i] = 1 + 23 * i % 127; |
65 | if (buf1[align + i] == seek_char) |
66 | buf1[align + i] = seek_char + 1; |
67 | } |
68 | buf1[align + len] = 0; |
69 | |
70 | if (pos < len) |
71 | { |
72 | buf1[align + pos] = seek_char; |
73 | buf1[align + len] = -seek_char; |
74 | result = (char *) (buf1 + align + pos); |
75 | } |
76 | else |
77 | { |
78 | result = NULL; |
79 | buf1[align + len] = seek_char; |
80 | } |
81 | |
82 | FOR_EACH_IMPL (impl, 0) |
83 | do_one_test (impl, s: (char *) (buf1 + align), c: seek_char, n: len, exp_res: result); |
84 | } |
85 | |
86 | static void |
87 | do_random_tests (void) |
88 | { |
89 | size_t i, j, n, align, pos, len; |
90 | int seek_char; |
91 | char *result; |
92 | unsigned char *p = buf1 + page_size - 512; |
93 | |
94 | for (n = 0; n < ITERATIONS; n++) |
95 | { |
96 | align = random () & 15; |
97 | pos = random () & 511; |
98 | if (pos + align >= 512) |
99 | pos = 511 - align - (random () & 7); |
100 | len = random () & 511; |
101 | if (pos >= len) |
102 | len = pos + (random () & 7); |
103 | if (len + align >= 512) |
104 | len = 512 - align - (random () & 7); |
105 | seek_char = random () & 255; |
106 | j = len + align + 64; |
107 | if (j > 512) |
108 | j = 512; |
109 | |
110 | for (i = 0; i < j; i++) |
111 | { |
112 | if (i == pos + align) |
113 | p[i] = seek_char; |
114 | else |
115 | { |
116 | p[i] = random () & 255; |
117 | if (p[i] == seek_char) |
118 | p[i] = seek_char + 13; |
119 | } |
120 | } |
121 | |
122 | if (pos < len) |
123 | result = (char *) (p + pos + align); |
124 | else |
125 | result = NULL; |
126 | |
127 | FOR_EACH_IMPL (impl, 1) |
128 | if (CALL (impl, (char *) (p + align), seek_char, len) != result) |
129 | { |
130 | error (status: 0, errnum: 0, format: "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p" , |
131 | n, impl->name, align, seek_char, len, pos, |
132 | CALL (impl, (char *) (p + align), seek_char, len), |
133 | result, p); |
134 | ret = 1; |
135 | } |
136 | } |
137 | } |
138 | |
139 | int |
140 | test_main (void) |
141 | { |
142 | size_t i; |
143 | |
144 | test_init (); |
145 | |
146 | printf (format: "%20s" , "" ); |
147 | FOR_EACH_IMPL (impl, 0) |
148 | printf (format: "\t%s" , impl->name); |
149 | putchar (c: '\n'); |
150 | |
151 | for (i = 1; i < 8; ++i) |
152 | { |
153 | /* Test len == 0. */ |
154 | do_test (align: i, pos: i, len: 0, seek_char: 0); |
155 | do_test (align: i, pos: i, len: 0, seek_char: 23); |
156 | |
157 | do_test (align: 0, pos: 16 << i, len: 2048, seek_char: 23); |
158 | do_test (align: i, pos: 64, len: 256, seek_char: 23); |
159 | do_test (align: 0, pos: 16 << i, len: 2048, seek_char: 0); |
160 | do_test (align: i, pos: 64, len: 256, seek_char: 0); |
161 | |
162 | do_test (align: 0, pos: i, len: 256, seek_char: 23); |
163 | do_test (align: 0, pos: i, len: 256, seek_char: 0); |
164 | do_test (align: i, pos: i, len: 256, seek_char: 23); |
165 | do_test (align: i, pos: i, len: 256, seek_char: 0); |
166 | |
167 | } |
168 | for (i = 1; i < 32; ++i) |
169 | { |
170 | do_test (align: 0, pos: i, len: i + 1, seek_char: 23); |
171 | do_test (align: 0, pos: i, len: i + 1, seek_char: 0); |
172 | do_test (align: i, pos: i, len: i + 1, seek_char: 23); |
173 | do_test (align: i, pos: i, len: i + 1, seek_char: 0); |
174 | |
175 | do_test (align: 0, pos: 1, len: i + 1, seek_char: 23); |
176 | do_test (align: 0, pos: 2, len: i + 1, seek_char: 0); |
177 | do_test (align: i, pos: 1, len: i + 1, seek_char: 23); |
178 | do_test (align: i, pos: 2, len: i + 1, seek_char: 0); |
179 | } |
180 | |
181 | do_random_tests (); |
182 | return ret; |
183 | } |
184 | |
185 | #include <support/test-driver.c> |
186 | |