1 /* Measure strncpy 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/>. */
19 #define BIG_CHAR MAX_CHAR
22 # define SMALL_CHAR 1273
24 # define SMALL_CHAR 127
27 #ifndef STRNCPY_RESULT
28 # define STRNCPY_RESULT(dst, len, n) dst
31 # define TEST_NAME "strncpy"
33 # define TEST_NAME "wcsncpy"
34 # define generic_strncpy generic_wcsncpy
36 # include "bench-string.h"
39 generic_strncpy (CHAR *dst, const CHAR *src, size_t n)
41 size_t nc = STRNLEN (src, n);
43 MEMSET (dst + nc, 0, n - nc);
44 return MEMCPY (dst, src, nc);
48 IMPL (generic_strncpy, 0)
50 #endif /* !STRNCPY_RESULT */
52 typedef CHAR *(*proto_t) (CHAR *, const CHAR *, size_t);
55 do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, size_t len, size_t n)
57 size_t i, iters = INNER_LOOP_ITERS_LARGE * (4 / CHARBYTES);
58 timing_t start, stop, cur;
60 if (CALL (impl, dst, src, n) != STRNCPY_RESULT (dst, len, n))
62 error (0, 0, "Wrong result in function %s %p %p", impl->name,
63 CALL (impl, dst, src, n), dst);
68 if (memcmp (dst, src, (len > n ? n : len) * sizeof (CHAR)) != 0)
70 error (0, 0, "Wrong result in function %s", impl->name);
79 for (i = len; i < n; ++i)
82 error (0, 0, "Wrong result in function %s", impl->name);
89 for (i = 0; i < iters; ++i)
91 CALL (impl, dst, src, n);
95 TIMING_DIFF (cur, start, stop);
97 TIMING_PRINT_MEAN ((double) cur, (double) iters);
101 do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char)
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)). */
109 if ((align1 + len) * sizeof (CHAR) >= page_size)
113 if ((align2 + len) * sizeof (CHAR) >= page_size)
116 s1 = (CHAR *) (buf1) + align1;
117 s2 = (CHAR *) (buf2) + align2;
119 for (i = 0; i < len; ++i)
120 s1[i] = 32 + 23 * i % (max_char - 32);
122 for (i = len + 1; (i + align1) * sizeof (CHAR) < page_size && i < len + 64;
124 s1[i] = 32 + 32 * i % (max_char - 32);
126 printf ("Length %4zd, n %4zd, alignment %2zd/%2zd:", len, n, align1, align2);
128 FOR_EACH_IMPL (impl, 0)
129 do_one_test (impl, s2, s1, len, n);
142 FOR_EACH_IMPL (impl, 0)
143 printf ("\t%s", impl->name);
146 for (i = 1; i < 8; ++i)
148 do_test (i, i, 16, 16, SMALL_CHAR);
149 do_test (i, i, 16, 16, BIG_CHAR);
150 do_test (i, 2 * i, 16, 16, SMALL_CHAR);
151 do_test (2 * i, i, 16, 16, BIG_CHAR);
152 do_test (8 - i, 2 * i, 1 << i, 2 << i, SMALL_CHAR);
153 do_test (2 * i, 8 - i, 2 << i, 1 << i, SMALL_CHAR);
154 do_test (8 - i, 2 * i, 1 << i, 2 << i, BIG_CHAR);
155 do_test (2 * i, 8 - i, 2 << i, 1 << i, BIG_CHAR);
158 for (i = 1; i < 8; ++i)
160 do_test (0, 0, 4 << i, 8 << i, SMALL_CHAR);
161 do_test (0, 0, 16 << i, 8 << i, SMALL_CHAR);
162 do_test (8 - i, 2 * i, 4 << i, 8 << i, SMALL_CHAR);
163 do_test (8 - i, 2 * i, 16 << i, 8 << i, SMALL_CHAR);
169 #include <support/test-driver.c>