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1/* Test and measure memrchr functions.
2 Copyright (C) 2013-2019 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#define TEST_NAME "memrchr"
22#include "test-string.h"
23
24typedef char *(*proto_t) (const char *, int, size_t);
25char *simple_memrchr (const char *, int, size_t);
26
27IMPL (simple_memrchr, 0)
28IMPL (memrchr, 1)
29
30char *
31simple_memrchr (const char *s, int c, size_t n)
32{
33 s = s + n;
34 while (n--)
35 if (*--s == (char) c)
36 return (char *) s;
37 return NULL;
38}
39
40static void
41do_one_test (impl_t *impl, const char *s, int c, size_t n, char *exp_res)
42{
43 char *res = CALL (impl, s, c, n);
44 if (res != exp_res)
45 {
46 error (0, 0, "Wrong result in function %s %p %p", impl->name,
47 res, exp_res);
48 ret = 1;
49 return;
50 }
51}
52
53static void
54do_test (size_t align, size_t pos, size_t len, int seek_char)
55{
56 size_t i;
57 char *result;
58
59 align &= 7;
60 if (align + len >= page_size)
61 return;
62
63 for (i = 0; i < len; ++i)
64 {
65 buf1[align + i] = 1 + 23 * i % 127;
66 if (buf1[align + i] == seek_char)
67 buf1[align + i] = seek_char + 1;
68 }
69 buf1[align + len] = 0;
70
71 if (pos < len)
72 {
73 buf1[align + pos] = seek_char;
74 buf1[align + len] = -seek_char;
75 result = (char *) (buf1 + align + pos);
76 }
77 else
78 {
79 result = NULL;
80 buf1[align + len] = seek_char;
81 }
82
83 FOR_EACH_IMPL (impl, 0)
84 do_one_test (impl, (char *) (buf1 + align), seek_char, len, result);
85}
86
87static void
88do_random_tests (void)
89{
90 size_t i, j, n, align, pos, len;
91 int seek_char;
92 char *result;
93 unsigned char *p = buf1 + page_size - 512;
94
95 for (n = 0; n < ITERATIONS; n++)
96 {
97 align = random () & 15;
98 pos = random () & 511;
99 if (pos + align >= 512)
100 pos = 511 - align - (random () & 7);
101 len = random () & 511;
102 if (pos >= len)
103 len = pos + (random () & 7);
104 if (len + align >= 512)
105 len = 512 - align - (random () & 7);
106 seek_char = random () & 255;
107 j = len + align + 64;
108 if (j > 512)
109 j = 512;
110
111 for (i = 0; i < j; i++)
112 {
113 if (i == pos + align)
114 p[i] = seek_char;
115 else
116 {
117 p[i] = random () & 255;
118 if (p[i] == seek_char)
119 p[i] = seek_char + 13;
120 }
121 }
122
123 if (pos < len)
124 result = (char *) (p + pos + align);
125 else
126 result = NULL;
127
128 FOR_EACH_IMPL (impl, 1)
129 if (CALL (impl, (char *) (p + align), seek_char, len) != result)
130 {
131 error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
132 n, impl->name, align, seek_char, len, pos,
133 CALL (impl, (char *) (p + align), seek_char, len),
134 result, p);
135 ret = 1;
136 }
137 }
138}
139
140int
141test_main (void)
142{
143 size_t i;
144
145 test_init ();
146
147 printf ("%20s", "");
148 FOR_EACH_IMPL (impl, 0)
149 printf ("\t%s", impl->name);
150 putchar ('\n');
151
152 for (i = 1; i < 8; ++i)
153 {
154 /* Test len == 0. */
155 do_test (i, i, 0, 0);
156 do_test (i, i, 0, 23);
157
158 do_test (0, 16 << i, 2048, 23);
159 do_test (i, 64, 256, 23);
160 do_test (0, 16 << i, 2048, 0);
161 do_test (i, 64, 256, 0);
162
163 do_test (0, i, 256, 23);
164 do_test (0, i, 256, 0);
165 do_test (i, i, 256, 23);
166 do_test (i, i, 256, 0);
167
168 }
169 for (i = 1; i < 32; ++i)
170 {
171 do_test (0, i, i + 1, 23);
172 do_test (0, i, i + 1, 0);
173 do_test (i, i, i + 1, 23);
174 do_test (i, i, i + 1, 0);
175
176 do_test (0, 1, i + 1, 23);
177 do_test (0, 2, i + 1, 0);
178 do_test (i, 1, i + 1, 23);
179 do_test (i, 2, i + 1, 0);
180 }
181
182 do_random_tests ();
183 return ret;
184}
185
186#include <support/test-driver.c>
187

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