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1/* Test and measure 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#include <assert.h>
21
22#define TEST_MAIN
23#define TEST_NAME "rawmemchr"
24#include "test-string.h"
25
26typedef char *(*proto_t) (const char *, int);
27char *simple_rawmemchr (const char *, int);
28
29IMPL (simple_rawmemchr, 0)
30IMPL (rawmemchr, 1)
31
32char *
33simple_rawmemchr (const char *s, int c)
34{
35 while (1)
36 if (*s++ == (char) c)
37 return (char *) s - 1;
38 return NULL;
39}
40
41static void
42do_one_test (impl_t *impl, const char *s, int c, char *exp_res)
43{
44 char *res = CALL (impl, s, c);
45 if (res != exp_res)
46 {
47 error (0, 0, "Wrong result in function %s %p %p", impl->name,
48 res, exp_res);
49 ret = 1;
50 return;
51 }
52}
53
54static void
55do_test (size_t align, size_t pos, size_t len, int seek_char)
56{
57 size_t i;
58 char *result;
59
60 align &= 7;
61 if (align + len >= page_size)
62 return;
63
64 for (i = 0; i < len; ++i)
65 {
66 buf1[align + i] = 1 + 23 * i % 127;
67 if (buf1[align + i] == seek_char)
68 buf1[align + i] = seek_char + 1;
69 }
70 buf1[align + len] = 0;
71
72 assert (pos < len);
73
74 buf1[align + pos] = seek_char;
75 buf1[align + len] = -seek_char;
76 result = (char *) (buf1 + align + pos);
77
78 FOR_EACH_IMPL (impl, 0)
79 do_one_test (impl, (char *) (buf1 + align), seek_char, result);
80}
81
82static void
83do_random_tests (void)
84{
85 size_t i, j, n, align, pos, len;
86 int seek_char;
87 char *result;
88 unsigned char *p = buf1 + page_size - 512;
89
90 for (n = 0; n < ITERATIONS; n++)
91 {
92 align = random () & 15;
93 pos = random () & 511;
94 if (pos + align >= 512)
95 pos = 511 - align - (random () & 7);
96 len = random () & 511;
97 if (len + align >= 512)
98 len = 512 - align - (random () & 7);
99 if (pos >= len)
100 continue;
101 seek_char = random () & 255;
102 j = len + align + 64;
103 if (j > 512)
104 j = 512;
105
106 for (i = 0; i < j; i++)
107 {
108 if (i == pos + align)
109 p[i] = seek_char;
110 else
111 {
112 p[i] = random () & 255;
113 if (i < pos + align && p[i] == seek_char)
114 p[i] = seek_char + 13;
115 }
116 }
117
118 assert (pos < len);
119 size_t r = random ();
120 if ((r & 31) == 0)
121 len = ~(uintptr_t) (p + align) - ((r >> 5) & 31);
122 result = (char *) (p + pos + align);
123
124 FOR_EACH_IMPL (impl, 1)
125 if (CALL (impl, (char *) (p + align), seek_char) != result)
126 {
127 error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
128 n, impl->name, align, seek_char, len, pos,
129 CALL (impl, (char *) (p + align), seek_char),
130 result, p);
131 ret = 1;
132 }
133 }
134}
135
136int
137test_main (void)
138{
139 size_t i;
140
141 test_init ();
142
143 printf ("%20s", "");
144 FOR_EACH_IMPL (impl, 0)
145 printf ("\t%s", impl->name);
146 putchar ('\n');
147
148 for (i = 1; i < 7; ++i)
149 {
150 do_test (0, 16 << i, 2048, 23);
151 do_test (i, 64, 256, 23);
152 do_test (0, 16 << i, 2048, 0);
153 do_test (i, 64, 256, 0);
154 }
155 for (i = 1; i < 32; ++i)
156 {
157 do_test (0, i, i + 1, 23);
158 do_test (0, i, i + 1, 0);
159 }
160
161 do_random_tests ();
162 return ret;
163}
164
165#include <support/test-driver.c>
166

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