1 /* Test and measure memchr functions.
2 Copyright (C) 1999-2013 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, see
18 <http://www.gnu.org/licenses/>. */
21 #define TEST_NAME "memchr"
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)
31 simple_memchr (const char *s
, int c
, size_t n
)
35 return (char *) s
- 1;
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
);
45 error (0, 0, "Wrong result in function %s %p %p", impl
->name
,
53 hp_timing_t start
__attribute ((unused
));
54 hp_timing_t stop
__attribute ((unused
));
55 hp_timing_t best_time
= ~ (hp_timing_t
) 0;
58 for (i
= 0; i
< 32; ++i
)
60 HP_TIMING_NOW (start
);
63 HP_TIMING_BEST (best_time
, start
, stop
);
66 printf ("\t%zd", (size_t) best_time
);
71 do_test (size_t align
, size_t pos
, size_t len
, int seek_char
)
77 if (align
+ len
>= page_size
)
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;
90 buf1
[align
+ pos
] = seek_char
;
91 buf1
[align
+ len
] = -seek_char
;
92 result
= (char *) (buf1
+ align
+ pos
);
97 buf1
[align
+ len
] = seek_char
;
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
);
111 do_random_tests (void)
113 size_t i
, j
, n
, align
, pos
, len
;
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;
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;
134 for (i
= 0; i
< j
; i
++)
136 if (i
== pos
+ align
)
140 p
[i
] = random () & 255;
141 if (i
< pos
+ align
&& p
[i
] == seek_char
)
142 p
[i
] = seek_char
+ 13;
148 size_t r
= random ();
150 len
= ~(uintptr_t) (p
+ align
) - ((r
>> 5) & 31);
151 result
= (char *) (p
+ pos
+ align
);
156 FOR_EACH_IMPL (impl
, 1)
157 if (CALL (impl
, (char *) (p
+ align
), seek_char
, len
) != result
)
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
),
176 FOR_EACH_IMPL (impl
, 0)
177 printf ("\t%s", impl
->name
);
180 for (i
= 1; i
< 8; ++i
)
182 do_test (0, 16 << i
, 2048, 23);
183 do_test (i
, 64, 256, 23);
184 do_test (0, 16 << i
, 2048, 0);
185 do_test (i
, 64, 256, 0);
187 for (i
= 1; i
< 32; ++i
)
189 do_test (0, i
, i
+ 1, 23);
190 do_test (0, i
, i
+ 1, 0);
197 #include "../test-skeleton.c"