1/* Copyright (C) 1995-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <wchar.h>
20#include <loop_unroll.h>
21
22
23#ifdef WCSCPY
24# define __wcscpy WCSCPY
25#endif
26
27/* Copy SRC to DEST. */
28wchar_t *
29__wcscpy (wchar_t *dest, const wchar_t *src)
30{
31#ifndef UNROLL_NTIMES
32 return __wmemcpy (dest, src, __wcslen (src) + 1);
33#else
34 /* Some architectures might have costly tail function call (powerpc
35 for instance) where wmemcpy call overhead for smalls sizes might
36 be more costly than just unrolling the main loop. */
37 wchar_t *wcp = dest;
38
39#define ITERATION(index) \
40 ({ \
41 wchar_t c = *src++; \
42 *wcp++ = c; \
43 c != L'\0'; \
44 })
45
46 while (1)
47 UNROLL_REPEAT(UNROLL_NTIMES, ITERATION);
48 return dest;
49#endif
50}
51#ifndef WCSCPY
52weak_alias (__wcscpy, wcscpy)
53libc_hidden_def (__wcscpy)
54#endif
55