1 /* Test and measure memrchr functions.
2 Copyright (C) 2013-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
20 #define TEST_NAME "memrchr"
21 #include "test-string.h"
23 typedef char *(*proto_t
) (const char *, int, size_t);
24 char *simple_memrchr (const char *, int, size_t);
26 IMPL (simple_memrchr
, 0)
30 simple_memrchr (const char *s
, int c
, size_t n
)
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 (p
[i
] == seek_char
)
118 p
[i
] = seek_char
+ 13;
123 result
= (char *) (p
+ pos
+ align
);
127 FOR_EACH_IMPL (impl
, 1)
128 if (CALL (impl
, (char *) (p
+ align
), seek_char
, len
) != result
)
130 error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
131 n
, impl
->name
, align
, seek_char
, len
, pos
,
132 CALL (impl
, (char *) (p
+ align
), seek_char
, len
),
147 FOR_EACH_IMPL (impl
, 0)
148 printf ("\t%s", impl
->name
);
151 for (i
= 1; i
< 8; ++i
)
154 do_test (i
, i
, 0, 0);
155 do_test (i
, i
, 0, 23);
157 do_test (0, 16 << i
, 2048, 23);
158 do_test (i
, 64, 256, 23);
159 do_test (0, 16 << i
, 2048, 0);
160 do_test (i
, 64, 256, 0);
162 do_test (0, i
, 256, 23);
163 do_test (0, i
, 256, 0);
164 do_test (i
, i
, 256, 23);
165 do_test (i
, i
, 256, 0);
168 for (i
= 1; i
< 32; ++i
)
170 do_test (0, i
, i
+ 1, 23);
171 do_test (0, i
, i
+ 1, 0);
172 do_test (i
, i
, i
+ 1, 23);
173 do_test (i
, i
, i
+ 1, 0);
175 do_test (0, 1, i
+ 1, 23);
176 do_test (0, 2, i
+ 1, 0);
177 do_test (i
, 1, i
+ 1, 23);
178 do_test (i
, 2, i
+ 1, 0);
185 #include <support/test-driver.c>