mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 23:10:06 +00:00
fcf40ebe26
This patch provides optimized versions of strnlen and wcsnlen with the z13 vector instructions. ChangeLog: * sysdeps/s390/multiarch/strnlen-c.c: New File. * sysdeps/s390/multiarch/strnlen-vx.S: Likewise. * sysdeps/s390/multiarch/strnlen.c: Likewise. * sysdeps/s390/multiarch/wcsnlen-c.c: Likewise. * sysdeps/s390/multiarch/wcsnlen-vx.S: Likewise. * sysdeps/s390/multiarch/wcsnlen.c: Likewise. * sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strnlen and wcsnlen functions. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add ifunc test for strnlen, wcsnlen. * wcsmbs/wcsnlen.c: Use WCSNLEN if defined. * string/test-strnlen.c: Add wcsnlen support. * wcsmbs/test-wcsnlen.c: New File. * wcsmbs/Makefile (strop-tests): Add wcsnlen. * benchtests/bench-strnlen.c: Add wcsnlen support. * benchtests/bench-wcsnlen.c: New File. * benchtests/Makefile (wcsmbs-bench): Add wcsnlen.
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/* Copyright (C) 1998-2015 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <wchar.h>
|
|
|
|
#ifdef WCSNLEN
|
|
# define __wcsnlen WCSNLEN
|
|
#endif
|
|
|
|
/* Return length of string S at most maxlen. */
|
|
size_t
|
|
__wcsnlen (s, maxlen)
|
|
const wchar_t *s;
|
|
size_t maxlen;
|
|
{
|
|
size_t len = 0;
|
|
|
|
while (maxlen > 0 && s[len] != L'\0')
|
|
{
|
|
++len;
|
|
if (--maxlen == 0 || s[len] == L'\0')
|
|
return len;
|
|
++len;
|
|
if (--maxlen == 0 || s[len] == L'\0')
|
|
return len;
|
|
++len;
|
|
if (--maxlen == 0 || s[len] == L'\0')
|
|
return len;
|
|
++len;
|
|
--maxlen;
|
|
}
|
|
|
|
return len;
|
|
}
|
|
#ifndef WCSNLEN
|
|
weak_alias (__wcsnlen, wcsnlen)
|
|
#endif
|