mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 05:00:15 +00:00
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/* Copyright (C) 1995-2020 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
|
|
|
|
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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <wchar.h>
|
|
#include <loop_unroll.h>
|
|
|
|
|
|
#ifdef WCSCPY
|
|
# define __wcscpy WCSCPY
|
|
#endif
|
|
|
|
/* Copy SRC to DEST. */
|
|
wchar_t *
|
|
__wcscpy (wchar_t *dest, const wchar_t *src)
|
|
{
|
|
#ifndef UNROLL_NTIMES
|
|
return __wmemcpy (dest, src, __wcslen (src) + 1);
|
|
#else
|
|
/* Some architectures might have costly tail function call (powerpc
|
|
for instance) where wmemcpy call overhead for smalls sizes might
|
|
be more costly than just unrolling the main loop. */
|
|
wchar_t *wcp = dest;
|
|
|
|
#define ITERATION(index) \
|
|
({ \
|
|
wchar_t c = *src++; \
|
|
*wcp++ = c; \
|
|
c != L'\0'; \
|
|
})
|
|
|
|
while (1)
|
|
UNROLL_REPEAT(UNROLL_NTIMES, ITERATION);
|
|
return dest;
|
|
#endif
|
|
}
|
|
#ifndef WCSCPY
|
|
weak_alias (__wcscpy, wcscpy)
|
|
libc_hidden_def (__wcscpy)
|
|
#endif
|