1 /* Test and measure memrchr functions.
2 Copyright (C) 2013-2023 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);
27 /* Also check the generic implementation. */
29 #define weak_alias(a, b)
30 #define MEMRCHR __memrchr_default
31 #include "string/memrchr.c"
32 IMPL (__memrchr_default
, 1)
34 /* Naive implementation to verify results. */
36 simple_memrchr (const char *s
, int c
, size_t n
)
46 do_one_test (impl_t
*impl
, const char *s
, int c
, size_t n
, char *exp_res
)
48 char *res
= CALL (impl
, s
, c
, n
);
51 error (0, 0, "Wrong result in function %s %p %p", impl
->name
,
59 do_test (size_t align
, size_t pos
, size_t len
, int seek_char
)
65 if (align
+ len
>= page_size
)
68 for (i
= 0; i
< len
; ++i
)
70 buf1
[align
+ i
] = 1 + 23 * i
% 127;
71 if (buf1
[align
+ i
] == seek_char
)
72 buf1
[align
+ i
] = seek_char
+ 1;
74 buf1
[align
+ len
] = 0;
78 buf1
[align
+ pos
] = seek_char
;
79 buf1
[align
+ len
] = -seek_char
;
80 result
= (char *) (buf1
+ align
+ pos
);
85 buf1
[align
+ len
] = seek_char
;
88 FOR_EACH_IMPL (impl
, 0)
89 do_one_test (impl
, (char *) (buf1
+ align
), seek_char
, len
, result
);
93 do_random_tests (void)
95 size_t i
, j
, n
, align
, pos
, len
;
98 unsigned char *p
= buf1
+ page_size
- 512;
100 for (n
= 0; n
< ITERATIONS
; n
++)
102 align
= random () & 15;
103 pos
= random () & 511;
104 if (pos
+ align
>= 512)
105 pos
= 511 - align
- (random () & 7);
106 len
= random () & 511;
108 len
= pos
+ (random () & 7);
109 if (len
+ align
>= 512)
110 len
= 512 - align
- (random () & 7);
111 seek_char
= random () & 255;
112 j
= len
+ align
+ 64;
116 for (i
= 0; i
< j
; i
++)
118 if (i
== pos
+ align
)
122 p
[i
] = random () & 255;
123 if (p
[i
] == seek_char
)
124 p
[i
] = seek_char
+ 13;
129 result
= (char *) (p
+ pos
+ align
);
133 FOR_EACH_IMPL (impl
, 1)
134 if (CALL (impl
, (char *) (p
+ align
), seek_char
, len
) != result
)
136 error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
137 n
, impl
->name
, align
, seek_char
, len
, pos
,
138 CALL (impl
, (char *) (p
+ align
), seek_char
, len
),
153 FOR_EACH_IMPL (impl
, 0)
154 printf ("\t%s", impl
->name
);
157 for (i
= 1; i
< 8; ++i
)
160 do_test (i
, i
, 0, 0);
161 do_test (i
, i
, 0, 23);
163 do_test (0, 16 << i
, 2048, 23);
164 do_test (i
, 64, 256, 23);
165 do_test (0, 16 << i
, 2048, 0);
166 do_test (i
, 64, 256, 0);
168 do_test (0, i
, 256, 23);
169 do_test (0, i
, 256, 0);
170 do_test (i
, i
, 256, 23);
171 do_test (i
, i
, 256, 0);
174 for (i
= 1; i
< 32; ++i
)
176 do_test (0, i
, i
+ 1, 23);
177 do_test (0, i
, i
+ 1, 0);
178 do_test (i
, i
, i
+ 1, 23);
179 do_test (i
, i
, i
+ 1, 0);
181 do_test (0, 1, i
+ 1, 23);
182 do_test (0, 2, i
+ 1, 0);
183 do_test (i
, 1, i
+ 1, 23);
184 do_test (i
, 2, i
+ 1, 0);
191 #include <support/test-driver.c>