1 /* Test and measure memrchr functions.
2 Copyright (C) 2013-2017 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 "memrchr"
22 #include "test-string.h"
24 typedef char *(*proto_t
) (const char *, int, size_t);
25 char *simple_memrchr (const char *, int, size_t);
27 IMPL (simple_memrchr
, 0)
31 simple_memrchr (const char *s
, int c
, size_t n
)
41 do_one_test (impl_t
*impl
, const char *s
, int c
, size_t n
, char *exp_res
)
43 char *res
= CALL (impl
, s
, c
, n
);
46 error (0, 0, "Wrong result in function %s %p %p", impl
->name
,
54 do_test (size_t align
, size_t pos
, size_t len
, int seek_char
)
60 if (align
+ len
>= page_size
)
63 for (i
= 0; i
< len
; ++i
)
65 buf1
[align
+ i
] = 1 + 23 * i
% 127;
66 if (buf1
[align
+ i
] == seek_char
)
67 buf1
[align
+ i
] = seek_char
+ 1;
69 buf1
[align
+ len
] = 0;
73 buf1
[align
+ pos
] = seek_char
;
74 buf1
[align
+ len
] = -seek_char
;
75 result
= (char *) (buf1
+ align
+ pos
);
80 buf1
[align
+ len
] = seek_char
;
83 FOR_EACH_IMPL (impl
, 0)
84 do_one_test (impl
, (char *) (buf1
+ align
), seek_char
, len
, result
);
88 do_random_tests (void)
90 size_t i
, j
, n
, align
, pos
, len
;
93 unsigned char *p
= buf1
+ page_size
- 512;
95 for (n
= 0; n
< ITERATIONS
; n
++)
97 align
= random () & 15;
98 pos
= random () & 511;
99 if (pos
+ align
>= 512)
100 pos
= 511 - align
- (random () & 7);
101 len
= random () & 511;
103 len
= pos
+ (random () & 7);
104 if (len
+ align
>= 512)
105 len
= 512 - align
- (random () & 7);
106 seek_char
= random () & 255;
107 j
= len
+ align
+ 64;
111 for (i
= 0; i
< j
; i
++)
113 if (i
== pos
+ align
)
117 p
[i
] = random () & 255;
118 if (p
[i
] == seek_char
)
119 p
[i
] = seek_char
+ 13;
124 result
= (char *) (p
+ pos
+ align
);
128 FOR_EACH_IMPL (impl
, 1)
129 if (CALL (impl
, (char *) (p
+ align
), seek_char
, len
) != result
)
131 error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
132 n
, impl
->name
, align
, seek_char
, len
, pos
,
133 CALL (impl
, (char *) (p
+ align
), seek_char
, len
),
148 FOR_EACH_IMPL (impl
, 0)
149 printf ("\t%s", impl
->name
);
152 for (i
= 1; i
< 8; ++i
)
154 do_test (0, 16 << i
, 2048, 23);
155 do_test (i
, 64, 256, 23);
156 do_test (0, 16 << i
, 2048, 0);
157 do_test (i
, 64, 256, 0);
159 for (i
= 1; i
< 32; ++i
)
161 do_test (0, i
, i
+ 1, 23);
162 do_test (0, i
, i
+ 1, 0);
169 #include "../test-skeleton.c"