1 /* Test and measure memchr functions.
2 Copyright (C) 1999-2014 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 do_test (size_t align
, size_t pos
, size_t len
, int seek_char
)
59 if (align
+ len
>= page_size
)
62 for (i
= 0; i
< len
; ++i
)
64 buf1
[align
+ i
] = 1 + 23 * i
% 127;
65 if (buf1
[align
+ i
] == seek_char
)
66 buf1
[align
+ i
] = seek_char
+ 1;
68 buf1
[align
+ len
] = 0;
72 buf1
[align
+ pos
] = seek_char
;
73 buf1
[align
+ len
] = -seek_char
;
74 result
= (char *) (buf1
+ align
+ pos
);
79 buf1
[align
+ len
] = seek_char
;
82 FOR_EACH_IMPL (impl
, 0)
83 do_one_test (impl
, (char *) (buf1
+ align
), seek_char
, len
, result
);
87 do_random_tests (void)
89 size_t i
, j
, n
, align
, pos
, len
;
92 unsigned char *p
= buf1
+ page_size
- 512;
94 for (n
= 0; n
< ITERATIONS
; n
++)
96 align
= random () & 15;
97 pos
= random () & 511;
98 if (pos
+ align
>= 512)
99 pos
= 511 - align
- (random () & 7);
100 len
= random () & 511;
102 len
= pos
+ (random () & 7);
103 if (len
+ align
>= 512)
104 len
= 512 - align
- (random () & 7);
105 seek_char
= random () & 255;
106 j
= len
+ align
+ 64;
110 for (i
= 0; i
< j
; i
++)
112 if (i
== pos
+ align
)
116 p
[i
] = random () & 255;
117 if (i
< pos
+ align
&& p
[i
] == seek_char
)
118 p
[i
] = seek_char
+ 13;
124 size_t r
= random ();
126 len
= ~(uintptr_t) (p
+ align
) - ((r
>> 5) & 31);
127 result
= (char *) (p
+ pos
+ align
);
132 FOR_EACH_IMPL (impl
, 1)
133 if (CALL (impl
, (char *) (p
+ align
), seek_char
, len
) != result
)
135 error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
136 n
, impl
->name
, align
, seek_char
, len
, pos
,
137 CALL (impl
, (char *) (p
+ align
), seek_char
, len
),
152 FOR_EACH_IMPL (impl
, 0)
153 printf ("\t%s", impl
->name
);
156 for (i
= 1; i
< 8; ++i
)
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);
163 for (i
= 1; i
< 32; ++i
)
165 do_test (0, i
, i
+ 1, 23);
166 do_test (0, i
, i
+ 1, 0);
173 #include "../test-skeleton.c"