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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-02-05 17:34:05 -0200 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-02-27 10:00:34 -0300 |
| commit | 7b3fb620519f6887b2650cc8e0e3267e44914c7b (patch) | |
| tree | 6f79b02b90f468269045d821d23dd1f92e23bc66 | |
| parent | aa0e46636a5b71b609a41e9ab97134cd76ac1522 (diff) | |
| download | glibc-7b3fb620519f6887b2650cc8e0e3267e44914c7b.tar.gz glibc-7b3fb620519f6887b2650cc8e0e3267e44914c7b.tar.xz glibc-7b3fb620519f6887b2650cc8e0e3267e44914c7b.zip | |
wcsmbs: optimize wcpcpy
This patch rewrites wcpcpy using wcslen and wmemcpy. This is similar to the optimizatio done on stpcpy by f559d8cf29. Checked on x86_64-linux-gnu and string tests on a simulated m68k-linux-gnu. * sysdeps/m68k/wcpcpy.c: Remove file. * wcsmbs/wcpcpy.c (__wcpcpy): Rewrite using wcslen and wmemcpy.
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | sysdeps/m68k/wcpcpy.c | 36 | ||||
| -rw-r--r-- | wcsmbs/wcpcpy.c | 19 |
3 files changed, 8 insertions, 52 deletions
diff --git a/ChangeLog b/ChangeLog index 8096175cc9..2e0b69d20d 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +2019-02-27 Adhemerval Zanella <adhemerval.zanella@linaro.org> + + * sysdeps/m68k/wcpcpy.c: Remove file. + * wcsmbs/wcpcpy.c (__wcpcpy): Rewrite using wcslen and wmemcpy. + 2019-02-26 Joseph Myers <joseph@codesourcery.com> * sysdeps/arm/sysdep.h (#if condition): Break lines before rather diff --git a/sysdeps/m68k/wcpcpy.c b/sysdeps/m68k/wcpcpy.c deleted file mode 100644 index a4bac08308..0000000000 --- a/sysdeps/m68k/wcpcpy.c +++ /dev/null @@ -1,36 +0,0 @@ -/* Copyright (C) 1996-2019 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996. - - 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/>. */ - -/* The generic version of this file assumes that __alignof__(wchar_t) == - sizeof (wchar_t). We therefore use this port-specific implementation - instead. */ -#include <wchar.h> - -/* Copy SRC to DEST, returning the address of the terminating L'\0' in - DEST. */ -wchar_t * -__wcpcpy (wchar_t *dest, const wchar_t *src) -{ - do - ; - while ((*dest++ = *src++)); - - return dest - 1; -} - -weak_alias (__wcpcpy, wcpcpy) diff --git a/wcsmbs/wcpcpy.c b/wcsmbs/wcpcpy.c index 01978e98f3..666fe150bc 100644 --- a/wcsmbs/wcpcpy.c +++ b/wcsmbs/wcpcpy.c @@ -18,31 +18,18 @@ #include <wchar.h> -#define __need_ptrdiff_t -#include <stddef.h> - #ifdef WCPCPY # define __wcpcpy WCPCPY #endif + /* Copy SRC to DEST, returning the address of the terminating L'\0' in DEST. */ wchar_t * __wcpcpy (wchar_t *dest, const wchar_t *src) { - wchar_t *wcp = (wchar_t *) dest - 1; - wint_t c; - const ptrdiff_t off = src - dest + 1; - - do - { - c = wcp[off]; - *++wcp = c; - } - while (c != L'\0'); - - return wcp; + size_t len = __wcslen (src); + return __wmemcpy (dest, src, len + 1) + len; } - #ifndef WCPCPY weak_alias (__wcpcpy, wcpcpy) #endif |