1/* Copyright (C) 1995-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <wchar.h>
19#include <loop_unroll.h>
20
21
22#ifdef WCSCPY
23# define __wcscpy WCSCPY
24#endif
25
26/* Copy SRC to DEST. */
27wchar_t *
28__wcscpy (wchar_t *dest, const wchar_t *src)
29{
30#ifndef UNROLL_NTIMES
31 return __wmemcpy (dest, src, __wcslen (src) + 1);
32#else
33 /* Some architectures might have costly tail function call (powerpc
34 for instance) where wmemcpy call overhead for smalls sizes might
35 be more costly than just unrolling the main loop. */
36 wchar_t *wcp = dest;
37
38#define ITERATION(index) \
39 ({ \
40 wchar_t c = *src++; \
41 *wcp++ = c; \
42 c != L'\0'; \
43 })
44
45 while (1)
46 UNROLL_REPEAT(UNROLL_NTIMES, ITERATION);
47 return dest;
48#endif
49}
50#ifndef WCSCPY
51weak_alias (__wcscpy, wcscpy)
52libc_hidden_def (__wcscpy)
53#endif
54