1 /* Test and measure memchr functions.
2 Copyright (C) 1999-2022 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/>. */
22 #define TEST_NAME "rawmemchr"
23 #include "test-string.h"
25 typedef char *(*proto_t
) (const char *, int);
26 char *simple_rawmemchr (const char *, int);
28 IMPL (simple_rawmemchr
, 0)
32 simple_rawmemchr (const char *s
, int c
)
36 return (char *) s
- 1;
41 do_one_test (impl_t
*impl
, const char *s
, int c
, char *exp_res
)
43 char *res
= CALL (impl
, s
, c
);
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
);
77 FOR_EACH_IMPL (impl
, 0)
78 do_one_test (impl
, (char *) (buf1
+ align
), seek_char
, result
);
82 do_random_tests (void)
84 size_t i
, j
, n
, align
, pos
, len
;
87 unsigned char *p
= buf1
+ page_size
- 512;
89 for (n
= 0; n
< ITERATIONS
; n
++)
91 align
= random () & 15;
92 pos
= random () & 511;
93 if (pos
+ align
>= 512)
94 pos
= 511 - align
- (random () & 7);
95 len
= random () & 511;
96 if (len
+ align
>= 512)
97 len
= 512 - align
- (random () & 7);
100 seek_char
= random () & 255;
101 j
= len
+ align
+ 64;
105 for (i
= 0; i
< j
; i
++)
107 if (i
== pos
+ align
)
111 p
[i
] = random () & 255;
112 if (i
< pos
+ align
&& p
[i
] == seek_char
)
113 p
[i
] = seek_char
+ 13;
118 size_t r
= random ();
120 len
= ~(uintptr_t) (p
+ align
) - ((r
>> 5) & 31);
121 result
= (char *) (p
+ pos
+ align
);
123 FOR_EACH_IMPL (impl
, 1)
124 if (CALL (impl
, (char *) (p
+ align
), seek_char
) != result
)
126 error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
127 n
, impl
->name
, align
, seek_char
, len
, pos
,
128 CALL (impl
, (char *) (p
+ align
), seek_char
),
143 FOR_EACH_IMPL (impl
, 0)
144 printf ("\t%s", impl
->name
);
147 for (i
= 1; i
< 7; ++i
)
149 do_test (0, 16 << i
, 2048, 23);
150 do_test (i
, 64, 256, 23);
151 do_test (0, 16 << i
, 2048, 0);
152 do_test (i
, 64, 256, 0);
154 for (i
= 1; i
< 32; ++i
)
156 do_test (0, i
, i
+ 1, 23);
157 do_test (0, i
, i
+ 1, 0);
164 #include <support/test-driver.c>