about summary refs log tree commit diff
path: root/string/test-strlen.c
blob: ef13f12f4bdc1801d04c3c5cebed1a73e7651dd3 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
/* Test and measure STRLEN functions.
   Copyright (C) 1999-2024 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#define TEST_MAIN
#ifndef WIDE
# define TEST_NAME "strlen"
#else
# define TEST_NAME "wcslen"
#endif
#include "test-string.h"

#ifndef WIDE
# define STRLEN strlen
# define CHAR char
# define MAX_CHAR CHAR_MAX
#else
# include <wchar.h>
# define STRLEN wcslen
# define CHAR wchar_t
# define MAX_CHAR WCHAR_MAX
#endif

typedef size_t (*proto_t) (const CHAR *);

IMPL (STRLEN, 1)

/* Also check the generic implementation.  */
#undef STRLEN
#undef weak_alias
#define weak_alias(a, b)
#undef libc_hidden_builtin_def
#define libc_hidden_builtin_def(a)
#ifndef WIDE
# define STRLEN __strlen_default
# include "string/strlen.c"
IMPL (__strlen_default, 1)
#else
# define WCSLEN __wcslen_default
# include "wcsmbs/wcslen.c"
IMPL (__wcslen_default, 1)
#endif


static void
do_one_test (impl_t *impl, const CHAR *s, size_t exp_len)
{
  size_t len = CALL (impl, s);
  if (len != exp_len)
    {
      error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
	     len, exp_len);
      ret = 1;
      return;
    }
}

static void
do_test (size_t align, size_t len)
{
  size_t i;

  align &= (getpagesize () / sizeof (CHAR)) - 1;
  if (align + sizeof (CHAR) * len >= page_size)
    return;

  CHAR *buf = (CHAR *) (buf1);

  for (i = 0; i < len; ++i)
    buf[align + i] = 1 + 11111 * i % MAX_CHAR;
  buf[align + len] = 0;

  FOR_EACH_IMPL (impl, 0)
    do_one_test (impl, (CHAR *) (buf + align), len);
}

static void
do_random_tests (void)
{
  size_t i, j, n, align, len;
  CHAR *p = (CHAR *) (buf1 + page_size - 512 * sizeof (CHAR));

  for (n = 0; n < ITERATIONS; n++)
    {
      align = random () & 15;
      len = random () & 511;
      if (len + align > 510)
	len = 511 - align - (random () & 7);
      j = len + align + 64;
      if (j > 512)
	j = 512;

      for (i = 0; i < j; i++)
	{
	  if (i == len + align)
	    p[i] = 0;
	  else
	    {
	      p[i] = random () & 255;
	      if (i >= align && i < len + align && !p[i])
		p[i] = (random () & 127) + 1;
	    }
	}

      FOR_EACH_IMPL (impl, 1)
	if (CALL (impl, (CHAR *) (p + align)) != len)
	  {
	    error (0, 0, "Iteration %zd - wrong result in function %s (%zd) %zd != %zd, p %p",
		   n, impl->name, align, CALL (impl, (CHAR *) (p + align)),
		   len, p);
	    ret = 1;
	  }
    }
}

int
test_main (void)
{
  size_t i;

  test_init ();

  printf ("%20s", "");
  FOR_EACH_IMPL (impl, 0)
    printf ("\t%s", impl->name);
  putchar ('\n');

  /* Checking with only 4 * N alignments for wcslen, other alignments are wrong for wchar_t type arrays*/

  for (i = 1; i < 8; ++i)
  {
    do_test (sizeof (CHAR) * i, i);
    do_test (0, i);
  }

  for (i = 2; i <= 12; ++i)
    {
      do_test (0, 1 << i);
      do_test (sizeof (CHAR) * 7, 1 << i);
      do_test (sizeof (CHAR) * i, 1 << i);
      do_test (sizeof (CHAR) * i, (size_t)((1 << i) / 1.5));
    }

  /* Test strings near page boundary */

  size_t maxlength = 64 / sizeof (CHAR) - 1;
  size_t pagesize = getpagesize () / sizeof (CHAR);

  for (i = maxlength ; i > 1; --i)
    {
      /* String stays on the same page.  */
      do_test (pagesize - i, i - 1);
      /* String crosses page boundary.  */
      do_test (pagesize - i, maxlength);
    }

  do_random_tests ();
  return ret;
}

#include <support/test-driver.c>