171 lines
4.0 KiB
C
171 lines
4.0 KiB
C
/* Measure strncat functions.
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Copyright (C) 2013-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#define TEST_MAIN
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#ifndef WIDE
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# define TEST_NAME "strncat"
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#else
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# define TEST_NAME "wcsncat"
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# define generic_strncat generic_wcsncat
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#endif /* WIDE */
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#include "bench-string.h"
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#define BIG_CHAR MAX_CHAR
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#ifndef WIDE
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# define SMALL_CHAR 127
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#else
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# define SMALL_CHAR 1273
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#endif /* WIDE */
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typedef CHAR *(*proto_t) (CHAR *, const CHAR *, size_t);
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CHAR *
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generic_strncat (CHAR *dst, const CHAR *src, size_t n)
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{
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CHAR *end = dst + STRLEN (dst);
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n = STRNLEN (src, n);
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end[n] = 0;
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MEMCPY (end, src, n);
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return dst;
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}
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IMPL (STRNCAT, 2)
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IMPL (generic_strncat, 0)
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static void
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do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, size_t n)
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{
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size_t k = STRLEN (dst), i, iters = INNER_LOOP_ITERS8;
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timing_t start, stop, cur;
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if (CALL (impl, dst, src, n) != dst)
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{
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error (0, 0, "Wrong result in function %s %p != %p", impl->name,
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CALL (impl, dst, src, n), dst);
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ret = 1;
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return;
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}
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size_t len = STRLEN (src);
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if (MEMCMP (dst + k, src, len + 1 > n ? n : len + 1) != 0)
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{
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error (0, 0, "Incorrect concatenation in function %s",
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impl->name);
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ret = 1;
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return;
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}
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if (n < len && dst[k + n] != '\0')
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{
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error (0, 0, "There is no zero in the end of output string in %s",
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impl->name);
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ret = 1;
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return;
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}
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TIMING_NOW (start);
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for (i = 0; i < iters; ++i)
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{
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dst[k] = '\0';
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CALL (impl, dst, src, n);
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}
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TIMING_NOW (stop);
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TIMING_DIFF (cur, start, stop);
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TIMING_PRINT_MEAN ((double) cur, (double) iters);
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}
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static void
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do_test (size_t align1, size_t align2, size_t len1, size_t len2,
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size_t n, int max_char)
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{
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size_t i;
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CHAR *s1, *s2;
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align1 &= 7;
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if ((align1 + len1) * sizeof (CHAR) >= page_size)
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return;
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if ((align1 + n) * sizeof (CHAR) > page_size)
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return;
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align2 &= 7;
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if ((align2 + len1 + len2) * sizeof (CHAR) >= page_size)
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return;
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if ((align2 + len1 + n) * sizeof (CHAR) > page_size)
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return;
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s1 = (CHAR *) (buf1) + align1;
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s2 = (CHAR *) (buf2) + align2;
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for (i = 0; i < len1; ++i)
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s1[i] = 32 + 23 * i % (max_char - 32);
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s1[len1] = '\0';
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for (i = 0; i < len2; i++)
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s2[i] = 32 + 23 * i % (max_char - 32);
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printf ("Length %4zd/%4zd, alignment %2zd/%2zd, N %4zd:",
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len1, len2, align1, align2, n);
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FOR_EACH_IMPL (impl, 0)
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{
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s2[len2] = '\0';
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do_one_test (impl, s2, s1, n);
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}
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putchar ('\n');
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}
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int
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main (void)
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{
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size_t i, n;
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test_init ();
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printf ("%28s", "");
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FOR_EACH_IMPL (impl, 0)
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printf ("\t%s", impl->name);
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putchar ('\n');
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for (n = 2; n <= 2048; n*=4)
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{
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do_test (0, 2, 2, 2, n, SMALL_CHAR);
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do_test (0, 0, 4, 4, n, SMALL_CHAR);
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do_test (4, 0, 4, 4, n, BIG_CHAR);
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do_test (0, 0, 8, 8, n, SMALL_CHAR);
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do_test (0, 8, 8, 8, n, SMALL_CHAR);
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for (i = 1; i < 8; ++i)
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{
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do_test (0, 0, 8 << i, 8 << i, n, SMALL_CHAR);
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do_test (8 - i, 2 * i, 8 << i, 8 << i, n, SMALL_CHAR);
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do_test (0, 0, 8 << i, 2 << i, n, SMALL_CHAR);
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do_test (8 - i, 2 * i, 8 << i, 2 << i, n, SMALL_CHAR);
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}
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for (i = 1; i < 8; ++i)
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{
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do_test (i, 2 * i, 8 << i, 1, n, SMALL_CHAR);
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do_test (2 * i, i, 8 << i, 1, n, BIG_CHAR);
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do_test (i, i, 8 << i, 10, n, SMALL_CHAR);
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}
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}
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return ret;
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}
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