2013-11-18 20:03:07 +08:00
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/* Measure strsep functions.
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2022-01-02 02:54:23 +08:00
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Copyright (C) 2013-2022 Free Software Foundation, Inc.
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2013-11-18 20:03:07 +08:00
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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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Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 13:40:42 +08:00
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<https://www.gnu.org/licenses/>. */
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2013-11-18 20:03:07 +08:00
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#define TEST_MAIN
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#define TEST_NAME "strsep"
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#include "bench-string.h"
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char *
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simple_strsep (char **s1, char *s2)
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{
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char *begin;
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char *s;
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size_t j = 0;
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begin = *s1;
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s = begin;
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if (begin == NULL)
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return NULL;
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ssize_t s2len = strlen (s2);
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while (*s)
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{
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for (j = 0; j < s2len; j++)
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{
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if (*s == s2[j])
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{
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s[0] = '\0';
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*s1 = s + 1;
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return begin;
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}
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}
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s++;
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}
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*s1 = NULL;
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return begin;
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}
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2016-12-21 23:16:29 +08:00
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char *
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oldstrsep (char **stringp, const char *delim)
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{
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char *begin, *end;
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begin = *stringp;
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if (begin == NULL)
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return NULL;
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/* A frequent case is when the delimiter string contains only one
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character. Here we don't need to call the expensive `strpbrk'
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function and instead work using `strchr'. */
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if (delim[0] == '\0' || delim[1] == '\0')
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{
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char ch = delim[0];
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if (ch == '\0')
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end = NULL;
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else
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{
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if (*begin == ch)
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end = begin;
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else if (*begin == '\0')
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end = NULL;
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else
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end = strchr (begin + 1, ch);
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}
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}
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else
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/* Find the end of the token. */
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end = strpbrk (begin, delim);
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if (end)
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{
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/* Terminate the token and set *STRINGP past NUL character. */
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*end++ = '\0';
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*stringp = end;
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}
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else
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/* No more delimiters; this is the last token. */
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*stringp = NULL;
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return begin;
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}
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2013-11-18 20:03:07 +08:00
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typedef char *(*proto_t) (const char **, const char *);
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IMPL (simple_strsep, 0)
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IMPL (strsep, 1)
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2016-12-21 23:16:29 +08:00
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IMPL (oldstrsep, 2)
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2013-11-18 20:03:07 +08:00
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static void
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do_one_test (impl_t * impl, const char *s1, const char *s2)
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{
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2019-05-21 22:19:06 +08:00
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size_t i, iters = INNER_LOOP_ITERS_SMALL;
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2013-11-18 20:03:07 +08:00
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timing_t start, stop, cur;
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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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2016-12-21 23:16:29 +08:00
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const char *s1a = s1;
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CALL (impl, &s1a, s2);
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if (s1a != NULL)
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((char*)s1a)[-1] = '1';
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2013-11-18 20:03:07 +08:00
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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, int fail)
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{
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char *s2 = (char *) (buf2 + align2);
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2016-12-21 23:16:29 +08:00
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/* Search for a delimiter in a string containing mostly '0', so don't
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use '0' as a delimiter. */
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static const char d[] = "123456789abcdefg";
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2013-11-18 20:03:07 +08:00
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#define dl (sizeof (d) - 1)
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char *ss2 = s2;
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for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
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{
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size_t t = l > dl ? dl : l;
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ss2 = mempcpy (ss2, d, t);
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}
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s2[len2] = '\0';
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printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:",
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len1, len2, align1, align2, fail ? "fail" : "found");
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FOR_EACH_IMPL (impl, 0)
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{
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char *s1 = (char *) (buf1 + align1);
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2016-12-21 23:16:29 +08:00
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memset (s1, '0', len1);
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if (!fail)
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s1[len1 / 2] = '1';
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2013-11-18 20:03:07 +08:00
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s1[len1] = '\0';
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do_one_test (impl, s1, s2);
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}
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putchar ('\n');
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}
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static int
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test_main (void)
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{
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test_init ();
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printf ("%23s", "");
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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 (size_t klen = 2; klen < 32; ++klen)
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2016-12-21 23:16:29 +08:00
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for (size_t hlen = 4 * klen; hlen < 8 * klen; hlen += klen)
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2013-11-18 20:03:07 +08:00
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{
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do_test (0, 0, hlen, klen, 0);
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do_test (0, 0, hlen, klen, 1);
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do_test (0, 3, hlen, klen, 0);
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do_test (0, 3, hlen, klen, 1);
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do_test (0, 9, hlen, klen, 0);
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do_test (0, 9, hlen, klen, 1);
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do_test (0, 15, hlen, klen, 0);
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do_test (0, 15, hlen, klen, 1);
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do_test (3, 0, hlen, klen, 0);
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do_test (3, 0, hlen, klen, 1);
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do_test (3, 3, hlen, klen, 0);
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do_test (3, 3, hlen, klen, 1);
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do_test (3, 9, hlen, klen, 0);
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do_test (3, 9, hlen, klen, 1);
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do_test (3, 15, hlen, klen, 0);
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do_test (3, 15, hlen, klen, 1);
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do_test (9, 0, hlen, klen, 0);
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do_test (9, 0, hlen, klen, 1);
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do_test (9, 3, hlen, klen, 0);
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do_test (9, 3, hlen, klen, 1);
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do_test (9, 9, hlen, klen, 0);
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do_test (9, 9, hlen, klen, 1);
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do_test (9, 15, hlen, klen, 0);
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do_test (9, 15, hlen, klen, 1);
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do_test (15, 0, hlen, klen, 0);
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do_test (15, 0, hlen, klen, 1);
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do_test (15, 3, hlen, klen, 0);
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do_test (15, 3, hlen, klen, 1);
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do_test (15, 9, hlen, klen, 0);
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do_test (15, 9, hlen, klen, 1);
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do_test (15, 15, hlen, klen, 0);
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do_test (15, 15, hlen, klen, 1);
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}
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do_test (0, 0, page_size - 1, 16, 0);
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do_test (0, 0, page_size - 1, 16, 1);
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return ret;
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}
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2016-12-17 01:35:06 +08:00
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#include <support/test-driver.c>
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