1 | /* Measure strncpy functions. |
2 | Copyright (C) 2013-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
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. |
9 | |
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. |
14 | |
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/>. */ |
18 | |
19 | #define BIG_CHAR MAX_CHAR |
20 | |
21 | #ifdef WIDE |
22 | # define SMALL_CHAR 1273 |
23 | #else |
24 | # define SMALL_CHAR 127 |
25 | #endif /* !WIDE */ |
26 | |
27 | #ifndef STRNCPY_RESULT |
28 | # define STRNCPY_RESULT(dst, len, n) dst |
29 | # define TEST_MAIN |
30 | # ifndef WIDE |
31 | # define TEST_NAME "strncpy" |
32 | # else |
33 | # define TEST_NAME "wcsncpy" |
34 | # define generic_strncpy generic_wcsncpy |
35 | # endif /* WIDE */ |
36 | # include "bench-string.h" |
37 | |
38 | CHAR * |
39 | generic_strncpy (CHAR *dst, const CHAR *src, size_t n) |
40 | { |
41 | size_t nc = STRNLEN (src, n); |
42 | if (nc != n) |
43 | MEMSET (dst + nc, 0, n - nc); |
44 | return MEMCPY (dst, src, nc); |
45 | } |
46 | |
47 | IMPL (STRNCPY, 1) |
48 | IMPL (generic_strncpy, 0) |
49 | |
50 | #endif /* !STRNCPY_RESULT */ |
51 | |
52 | typedef CHAR *(*proto_t) (CHAR *, const CHAR *, size_t); |
53 | |
54 | static void |
55 | do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, size_t len, size_t n) |
56 | { |
57 | size_t i, iters = INNER_LOOP_ITERS_LARGE * (4 / CHARBYTES); |
58 | timing_t start, stop, cur; |
59 | |
60 | if (CALL (impl, dst, src, n) != STRNCPY_RESULT (dst, len, n)) |
61 | { |
62 | error (status: 0, errnum: 0, format: "Wrong result in function %s %p %p" , impl->name, |
63 | CALL (impl, dst, src, n), dst); |
64 | ret = 1; |
65 | return; |
66 | } |
67 | |
68 | if (memcmp (dst, src, (len > n ? n : len) * sizeof (CHAR)) != 0) |
69 | { |
70 | error (status: 0, errnum: 0, format: "Wrong result in function %s" , impl->name); |
71 | ret = 1; |
72 | return; |
73 | } |
74 | |
75 | if (n > len) |
76 | { |
77 | size_t i; |
78 | |
79 | for (i = len; i < n; ++i) |
80 | if (dst [i] != '\0') |
81 | { |
82 | error (status: 0, errnum: 0, format: "Wrong result in function %s" , impl->name); |
83 | ret = 1; |
84 | return; |
85 | } |
86 | } |
87 | |
88 | TIMING_NOW (start); |
89 | for (i = 0; i < iters; ++i) |
90 | { |
91 | CALL (impl, dst, src, n); |
92 | } |
93 | TIMING_NOW (stop); |
94 | |
95 | TIMING_DIFF (cur, start, stop); |
96 | |
97 | TIMING_PRINT_MEAN ((double) cur, (double) iters); |
98 | } |
99 | |
100 | static void |
101 | do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char) |
102 | { |
103 | size_t i; |
104 | CHAR *s1, *s2; |
105 | |
106 | /* For wcsncpy: align1 and align2 here mean alignment not in bytes, |
107 | but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t)). */ |
108 | align1 &= 7; |
109 | if ((align1 + len) * sizeof (CHAR) >= page_size) |
110 | return; |
111 | |
112 | align2 &= 7; |
113 | if ((align2 + len) * sizeof (CHAR) >= page_size) |
114 | return; |
115 | |
116 | s1 = (CHAR *) (buf1) + align1; |
117 | s2 = (CHAR *) (buf2) + align2; |
118 | |
119 | for (i = 0; i < len; ++i) |
120 | s1[i] = 32 + 23 * i % (max_char - 32); |
121 | s1[len] = 0; |
122 | for (i = len + 1; (i + align1) * sizeof (CHAR) < page_size && i < len + 64; |
123 | ++i) |
124 | s1[i] = 32 + 32 * i % (max_char - 32); |
125 | |
126 | printf (format: "Length %4zd, n %4zd, alignment %2zd/%2zd:" , len, n, align1, align2); |
127 | |
128 | FOR_EACH_IMPL (impl, 0) |
129 | do_one_test (impl, dst: s2, src: s1, len, n); |
130 | |
131 | putchar (c: '\n'); |
132 | } |
133 | |
134 | static int |
135 | test_main (void) |
136 | { |
137 | size_t i; |
138 | |
139 | test_init (); |
140 | |
141 | printf (format: "%28s" , "" ); |
142 | FOR_EACH_IMPL (impl, 0) |
143 | printf (format: "\t%s" , impl->name); |
144 | putchar (c: '\n'); |
145 | |
146 | for (i = 1; i < 8; ++i) |
147 | { |
148 | do_test (align1: i, align2: i, len: 16, n: 16, SMALL_CHAR); |
149 | do_test (align1: i, align2: i, len: 16, n: 16, BIG_CHAR); |
150 | do_test (align1: i, align2: 2 * i, len: 16, n: 16, SMALL_CHAR); |
151 | do_test (align1: 2 * i, align2: i, len: 16, n: 16, BIG_CHAR); |
152 | do_test (align1: 8 - i, align2: 2 * i, len: 1 << i, n: 2 << i, SMALL_CHAR); |
153 | do_test (align1: 2 * i, align2: 8 - i, len: 2 << i, n: 1 << i, SMALL_CHAR); |
154 | do_test (align1: 8 - i, align2: 2 * i, len: 1 << i, n: 2 << i, BIG_CHAR); |
155 | do_test (align1: 2 * i, align2: 8 - i, len: 2 << i, n: 1 << i, BIG_CHAR); |
156 | } |
157 | |
158 | for (i = 1; i < 8; ++i) |
159 | { |
160 | do_test (align1: 0, align2: 0, len: 4 << i, n: 8 << i, SMALL_CHAR); |
161 | do_test (align1: 0, align2: 0, len: 16 << i, n: 8 << i, SMALL_CHAR); |
162 | do_test (align1: 8 - i, align2: 2 * i, len: 4 << i, n: 8 << i, SMALL_CHAR); |
163 | do_test (align1: 8 - i, align2: 2 * i, len: 16 << i, n: 8 << i, SMALL_CHAR); |
164 | } |
165 | |
166 | return ret; |
167 | } |
168 | |
169 | #include <support/test-driver.c> |
170 | |