Updated to fedora-glibc-20071015T0728
[glibc.git] / string / test-memchr.c
blobc233ead5ddfc57dab33944b1823d062084f2d9d1
1 /* Test and measure memchr functions.
2 Copyright (C) 1999, 2002, 2003, 2005 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Written by Jakub Jelinek <jakub@redhat.com>, 1999.
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.
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.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
21 #define TEST_MAIN
22 #include "test-string.h"
24 typedef char *(*proto_t) (const char *, int, size_t);
25 char *simple_memchr (const char *, int, size_t);
27 IMPL (simple_memchr, 0)
28 IMPL (memchr, 1)
30 char *
31 simple_memchr (const char *s, int c, size_t n)
33 while (n--)
34 if (*s++ == (char) c)
35 return (char *) s - 1;
36 return NULL;
39 static void
40 do_one_test (impl_t *impl, const char *s, int c, size_t n, char *exp_res)
42 char *res = CALL (impl, s, c, n);
43 if (res != exp_res)
45 error (0, 0, "Wrong result in function %s %p %p", impl->name,
46 res, exp_res);
47 ret = 1;
48 return;
51 if (HP_TIMING_AVAIL)
53 hp_timing_t start __attribute ((unused));
54 hp_timing_t stop __attribute ((unused));
55 hp_timing_t best_time = ~ (hp_timing_t) 0;
56 size_t i;
58 for (i = 0; i < 32; ++i)
60 HP_TIMING_NOW (start);
61 CALL (impl, s, c, n);
62 HP_TIMING_NOW (stop);
63 HP_TIMING_BEST (best_time, start, stop);
66 printf ("\t%zd", (size_t) best_time);
70 static void
71 do_test (size_t align, size_t pos, size_t len, int seek_char)
73 size_t i;
74 char *result;
76 align &= 7;
77 if (align + len >= page_size)
78 return;
80 for (i = 0; i < len; ++i)
82 buf1[align + i] = 1 + 23 * i % 127;
83 if (buf1[align + i] == seek_char)
84 buf1[align + i] = seek_char + 1;
86 buf1[align + len] = 0;
88 if (pos < len)
90 buf1[align + pos] = seek_char;
91 buf1[align + len] = -seek_char;
92 result = (char *) (buf1 + align + pos);
94 else
96 result = NULL;
97 buf1[align + len] = seek_char;
100 if (HP_TIMING_AVAIL)
101 printf ("Length %4zd, alignment %2zd:", pos, align);
103 FOR_EACH_IMPL (impl, 0)
104 do_one_test (impl, (char *) (buf1 + align), seek_char, len, result);
106 if (HP_TIMING_AVAIL)
107 putchar ('\n');
110 static void
111 do_random_tests (void)
113 size_t i, j, n, align, pos, len;
114 int seek_char;
115 char *result;
116 unsigned char *p = buf1 + page_size - 512;
118 for (n = 0; n < ITERATIONS; n++)
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 () & 255;
130 j = len + align + 64;
131 if (j > 512)
132 j = 512;
134 for (i = 0; i < j; i++)
136 if (i == pos + align)
137 p[i] = seek_char;
138 else
140 p[i] = random () & 255;
141 if (i < pos + align && p[i] == seek_char)
142 p[i] = seek_char + 13;
146 if (pos < len)
147 result = (char *) (p + pos + align);
148 else
149 result = NULL;
151 FOR_EACH_IMPL (impl, 1)
152 if (CALL (impl, (char *) (p + align), seek_char, len) != result)
154 error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
155 n, impl->name, align, seek_char, len, pos,
156 CALL (impl, (char *) (p + align), seek_char, len),
157 result, p);
158 ret = 1;
164 test_main (void)
166 size_t i;
168 test_init ();
170 printf ("%20s", "");
171 FOR_EACH_IMPL (impl, 0)
172 printf ("\t%s", impl->name);
173 putchar ('\n');
175 for (i = 1; i < 8; ++i)
177 do_test (0, 16 << i, 2048, 23);
178 do_test (i, 64, 256, 23);
179 do_test (0, 16 << i, 2048, 0);
180 do_test (i, 64, 256, 0);
182 for (i = 1; i < 32; ++i)
184 do_test (0, i, i + 1, 23);
185 do_test (0, i, i + 1, 0);
188 do_random_tests ();
189 return ret;
192 #include "../test-skeleton.c"