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1/* Test memchr 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 "memchr"
23#else
24# define TEST_NAME "wmemchr"
25#endif /* WIDE */
26
27#include "test-string.h"
28#include <stdint.h>
29
30#ifndef WIDE
31# define MEMCHR memchr
32# define CHAR char
33# define UCHAR unsigned char
34# define SIMPLE_MEMCHR simple_memchr
35# define BIG_CHAR CHAR_MAX
36# define SMALL_CHAR 127
37#else
38# include <wchar.h>
39# define MEMCHR wmemchr
40# define CHAR wchar_t
41# define UCHAR wchar_t
42# define SIMPLE_MEMCHR simple_wmemchr
43# define BIG_CHAR WCHAR_MAX
44# define SMALL_CHAR 1273
45#endif /* WIDE */
46
47typedef CHAR *(*proto_t) (const CHAR *, int, size_t);
48CHAR *SIMPLE_MEMCHR (const CHAR *, int, size_t);
49
50IMPL (SIMPLE_MEMCHR, 0)
51IMPL (MEMCHR, 1)
52
53CHAR *
54SIMPLE_MEMCHR (const CHAR *s, int c, size_t n)
55{
56 while (n--)
57 if (*s++ == (CHAR) c)
58 return (CHAR *) s - 1;
59 return NULL;
60}
61
62static void
63do_one_test (impl_t *impl, const CHAR *s, int c, size_t n, CHAR *exp_res)
64{
65 CHAR *res = CALL (impl, s, c, n);
66 if (res != exp_res)
67 {
68 error (0, 0, "Wrong result in function %s %p %p", impl->name,
69 res, exp_res);
70 ret = 1;
71 return;
72 }
73}
74
75static void
76do_test (size_t align, size_t pos, size_t len, size_t n, int seek_char)
77{
78 size_t i;
79 CHAR *result;
80
81 if ((align + len) * sizeof (CHAR) >= page_size)
82 return;
83
84 CHAR *buf = (CHAR *) (buf1);
85
86 for (i = 0; i < len; ++i)
87 {
88 buf[align + i] = 1 + 23 * i % SMALL_CHAR;
89 if (buf[align + i] == seek_char)
90 buf[align + i] = seek_char + 1;
91 }
92 buf[align + len] = 0;
93
94 if (pos < len)
95 {
96 buf[align + pos] = seek_char;
97 buf[align + len] = -seek_char;
98 result = (CHAR *) (buf + align + pos);
99 }
100 else
101 {
102 result = NULL;
103 buf[align + len] = seek_char;
104 }
105
106 FOR_EACH_IMPL (impl, 0)
107 do_one_test (impl, (CHAR *) (buf + align), seek_char, n, result);
108}
109
110static void
111do_random_tests (void)
112{
113 size_t i, j, n, align, pos, len;
114 int seek_char;
115 CHAR *result;
116 UCHAR *p = (UCHAR *) (buf1 + page_size) - 512;
117
118 for (n = 0; n < ITERATIONS; n++)
119 {
120 align = random () & 15;
121 pos = random () & 511;
122 if (pos + align >= 512)
123 pos = 511 - align - (random () & 7);
124 len = random () & 511;
125 if (pos >= len)
126 len = pos + (random () & 7);
127 if (len + align >= 512)
128 len = 512 - align - (random () & 7);
129 seek_char = random () & BIG_CHAR;
130 j = len + align + 64;
131 if (j > 512)
132 j = 512;
133
134 for (i = 0; i < j; i++)
135 {
136 if (i == pos + align)
137 p[i] = seek_char;
138 else
139 {
140 p[i] = random () & BIG_CHAR;
141 if (i < pos + align && p[i] == seek_char)
142 p[i] = seek_char + 13;
143 }
144 }
145
146 if (pos < len)
147 {
148 size_t r = random ();
149 if ((r & 31) == 0)
150 len = ~(uintptr_t) (p + align) - ((r >> 5) & 31);
151 result = (CHAR *) (p + pos + align);
152 }
153 else
154 result = NULL;
155
156 FOR_EACH_IMPL (impl, 1)
157 if (CALL (impl, (CHAR *) (p + align), seek_char, len) != result)
158 {
159 error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
160 n, impl->name, align, seek_char, len, pos,
161 CALL (impl, (CHAR *) (p + align), seek_char, len),
162 result, p);
163 ret = 1;
164 }
165 }
166}
167
168int
169test_main (void)
170{
171 size_t i, j;
172
173 test_init ();
174
175 printf ("%20s", "");
176 FOR_EACH_IMPL (impl, 0)
177 printf ("\t%s", impl->name);
178 putchar ('\n');
179
180 for (i = 1; i < 8; ++i)
181 {
182 /* Test n == 0. */
183 do_test (i, i, 0, 0, 23);
184 do_test (i, i, 0, 0, 0);
185
186 do_test (0, 16 << i, 2048, 2048, 23);
187 do_test (i, 64, 256, 256, 23);
188 do_test (0, 16 << i, 2048, 2048, 0);
189 do_test (i, 64, 256, 256, 0);
190
191 /* Check for large input sizes and for these cases we need to
192 make sure the byte is within the size range (that's why
193 7 << i must be smaller than 2048). */
194 do_test (0, 7 << i, 2048, SIZE_MAX, 23);
195 do_test (0, 2048 - i, 2048, SIZE_MAX, 23);
196 do_test (i, 64, 256, SIZE_MAX, 23);
197 do_test (0, 7 << i, 2048, SIZE_MAX, 0);
198 do_test (0, 2048 - i, 2048, SIZE_MAX, 0);
199 do_test (i, 64, 256, SIZE_MAX, 0);
200 }
201
202 for (i = 1; i < 64; ++i)
203 {
204 for (j = 1; j < 64; j++)
205 {
206 do_test (0, 64 - j, 64, SIZE_MAX, 23);
207 do_test (i, 64 - j, 64, SIZE_MAX, 23);
208 }
209 }
210
211 for (i = 1; i < 32; ++i)
212 {
213 do_test (0, i, i + 1, i + 1, 23);
214 do_test (0, i, i + 1, i + 1, 0);
215 }
216
217 /* BZ#21182 - wrong overflow calculation for i686 implementation
218 with address near end of the page. */
219 for (i = 2; i < 16; ++i)
220 /* page_size is in fact getpagesize() * 2. */
221 do_test (page_size / 2 - i, i, i, 1, 0x9B);
222
223 do_random_tests ();
224 return ret;
225}
226
227#include <support/test-driver.c>
228

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