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 <stddef.h> |
19 | #include <wchar.h> |
20 | |
21 | |
22 | /* Copy SRC to DEST. */ |
23 | wchar_t * |
24 | __wcscpy_chk (wchar_t *dest, const wchar_t *src, size_t n) |
25 | { |
26 | wint_t c; |
27 | wchar_t *wcp; |
28 | |
29 | if (__alignof__ (wchar_t) >= sizeof (wchar_t)) |
30 | { |
31 | const ptrdiff_t off = dest - src - 1; |
32 | |
33 | wcp = (wchar_t *) src; |
34 | |
35 | do |
36 | { |
37 | if (__glibc_unlikely (n-- == 0)) |
38 | __chk_fail (); |
39 | c = *wcp++; |
40 | wcp[off] = c; |
41 | } |
42 | while (c != L'\0'); |
43 | } |
44 | else |
45 | { |
46 | wcp = dest; |
47 | |
48 | do |
49 | { |
50 | if (__glibc_unlikely (n-- == 0)) |
51 | __chk_fail (); |
52 | c = *src++; |
53 | *wcp++ = c; |
54 | } |
55 | while (c != L'\0'); |
56 | } |
57 | |
58 | return dest; |
59 | } |
60 | |