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1/* Test strlen functions.
2 Copyright (C) 1999-2019 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Written by Jakub Jelinek <jakub@redhat.com>, 1999.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
19
20#define TEST_MAIN
21#ifndef WIDE
22# define TEST_NAME "strnlen"
23#else
24# define TEST_NAME "wcsnlen"
25#endif /* !WIDE */
26#include "test-string.h"
27
28#ifndef WIDE
29# define STRNLEN strnlen
30# define CHAR char
31# define BIG_CHAR CHAR_MAX
32# define MIDDLE_CHAR 127
33# define SIMPLE_STRNLEN simple_strnlen
34#else
35# include <wchar.h>
36# define STRNLEN wcsnlen
37# define CHAR wchar_t
38# define BIG_CHAR WCHAR_MAX
39# define MIDDLE_CHAR 1121
40# define SIMPLE_STRNLEN simple_wcsnlen
41#endif /* !WIDE */
42
43typedef size_t (*proto_t) (const CHAR *, size_t);
44size_t SIMPLE_STRNLEN (const CHAR *, size_t);
45
46IMPL (SIMPLE_STRNLEN, 0)
47IMPL (STRNLEN, 1)
48
49size_t
50SIMPLE_STRNLEN (const CHAR *s, size_t maxlen)
51{
52 size_t i;
53
54 for (i = 0; i < maxlen && s[i]; ++i);
55 return i;
56}
57
58static void
59do_one_test (impl_t *impl, const CHAR *s, size_t maxlen, size_t exp_len)
60{
61 size_t len = CALL (impl, s, maxlen);
62 if (len != exp_len)
63 {
64 error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
65 len, exp_len);
66 ret = 1;
67 return;
68 }
69}
70
71static void
72do_test (size_t align, size_t len, size_t maxlen, int max_char)
73{
74 size_t i;
75
76 align &= 63;
77 if ((align + len) * sizeof (CHAR) >= page_size)
78 return;
79
80 CHAR *buf = (CHAR *) (buf1);
81
82 for (i = 0; i < len; ++i)
83 buf[align + i] = 1 + 11111 * i % max_char;
84 buf[align + len] = 0;
85
86 FOR_EACH_IMPL (impl, 0)
87 do_one_test (impl, (CHAR *) (buf + align), maxlen, MIN (len, maxlen));
88}
89
90static void
91do_random_tests (void)
92{
93 size_t i, j, n, align, len;
94 CHAR *p = (CHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
95
96 for (n = 0; n < ITERATIONS; n++)
97 {
98 align = random () & 15;
99 len = random () & 511;
100 if (len + align > 510)
101 len = 511 - align - (random () & 7);
102 j = len + align + 64;
103 if (j > 512)
104 j = 512;
105
106 for (i = 0; i < j; i++)
107 {
108 if (i == len + align)
109 p[i] = 0;
110 else
111 {
112 p[i] = random () & 255;
113 if (i >= align && i < len + align && !p[i])
114 p[i] = (random () & 127) + 1;
115 }
116 }
117
118 FOR_EACH_IMPL (impl, 1)
119 {
120 if (len > 0
121 && CALL (impl, (CHAR *) (p + align), len - 1) != len - 1)
122 {
123 error (0, 0, "Iteration %zd (limited) - wrong result in function %s (%zd) %zd != %zd, p %p",
124 n, impl->name, align,
125 CALL (impl, (CHAR *) (p + align), len - 1), len - 1, p);
126 ret = 1;
127 }
128 if (CALL (impl, (CHAR *) (p + align), len) != len)
129 {
130 error (0, 0, "Iteration %zd (exact) - wrong result in function %s (%zd) %zd != %zd, p %p",
131 n, impl->name, align,
132 CALL (impl, (CHAR *) (p + align), len), len, p);
133 ret = 1;
134 }
135 if (CALL (impl, (CHAR *) (p + align), len + 1) != len)
136 {
137 error (0, 0, "Iteration %zd (long) - wrong result in function %s (%zd) %zd != %zd, p %p",
138 n, impl->name, align,
139 CALL (impl, (CHAR *) (p + align), len + 1), len, p);
140 ret = 1;
141 }
142 }
143 }
144}
145
146/* Tests meant to unveil fail on implementation that does not access bytes
147 around the page boundary accordingly. */
148static void
149do_page_tests (void)
150{
151 size_t i, exp_len, start_offset, offset;
152 /* Calculate the null character offset. */
153 size_t last_offset = (page_size / sizeof (CHAR)) - 1;
154
155 CHAR *s = (CHAR *) buf2;
156 memset (s, 65, (last_offset - 1));
157 s[last_offset] = 0;
158
159 /* Place short strings ending at page boundary. */
160 offset = last_offset;
161 for (i = 0; i < 128; i++)
162 {
163 /* Decrease offset to stress several sizes and alignments. */
164 offset--;
165 exp_len = last_offset - offset;
166 FOR_EACH_IMPL (impl, 0)
167 {
168 /* Varies maxlen value to cover the cases where it is:
169 - larger than length;
170 - slightly greater than length;
171 - equal to length;
172 - slightly less than length. */
173 do_one_test (impl, (CHAR *) (s + offset), page_size, exp_len);
174 do_one_test (impl, (CHAR *) (s + offset), exp_len + 1, exp_len);
175 do_one_test (impl, (CHAR *) (s + offset), exp_len, exp_len);
176 if (exp_len > 0)
177 do_one_test (impl, (CHAR *) (s + offset), exp_len - 1, exp_len - 1);
178 }
179 }
180
181 /* Place long strings ending at page boundary. */
182 start_offset = (last_offset + 1) / 2;
183 for (i = 0; i < 64; ++i)
184 {
185 /* Increase offset to stress several alignments. */
186 offset = start_offset + i;
187 if (offset >= (last_offset + 1))
188 break;
189 exp_len = last_offset - offset;
190 FOR_EACH_IMPL (impl, 0)
191 {
192 /* Checks only for maxlen much larger than length because smaller
193 values are already covered in do_random_tests function. */
194 do_one_test (impl, (CHAR *) (s + offset), page_size, exp_len);
195 }
196 }
197}
198
199int
200test_main (void)
201{
202 size_t i;
203
204 test_init ();
205
206 printf ("%20s", "");
207 FOR_EACH_IMPL (impl, 0)
208 printf ("\t%s", impl->name);
209 putchar ('\n');
210
211 for (i = 1; i < 8; ++i)
212 {
213 do_test (0, i, i - 1, MIDDLE_CHAR);
214 do_test (0, i, i, MIDDLE_CHAR);
215 do_test (0, i, i + 1, MIDDLE_CHAR);
216 }
217
218 for (i = 1; i < 8; ++i)
219 {
220 do_test (i, i, i - 1, MIDDLE_CHAR);
221 do_test (i, i, i, MIDDLE_CHAR);
222 do_test (i, i, i + 1, MIDDLE_CHAR);
223 }
224
225 for (i = 2; i <= 10; ++i)
226 {
227 do_test (0, 1 << i, 5000, MIDDLE_CHAR);
228 do_test (1, 1 << i, 5000, MIDDLE_CHAR);
229 }
230
231 for (i = 1; i < 8; ++i)
232 do_test (0, i, 5000, BIG_CHAR);
233
234 for (i = 1; i < 8; ++i)
235 do_test (i, i, 5000, BIG_CHAR);
236
237 for (i = 2; i <= 10; ++i)
238 {
239 do_test (0, 1 << i, 5000, BIG_CHAR);
240 do_test (1, 1 << i, 5000, BIG_CHAR);
241 }
242
243 do_random_tests ();
244 do_page_tests ();
245 return ret;
246}
247
248#include <support/test-driver.c>
249

Warning: That file was not part of the compilation database. It may have many parsing errors.