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dff8da6b | 1 | /* Copyright (C) 1996-2024 Free Software Foundation, Inc. |
8215c9ec | 2 | This file is part of the GNU C Library. |
8215c9ec UD |
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 | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
8215c9ec UD |
17 | |
18 | #include <wchar.h> | |
19 | ||
20 | #define __need_ptrdiff_t | |
21 | #include <stddef.h> | |
22 | ||
23 | ||
24 | /* Copy SRC to DEST, returning the address of the terminating L'\0' in | |
25 | DEST. Check for overflows. */ | |
26 | wchar_t * | |
27 | __wcpcpy_chk (wchar_t *dest, const wchar_t *src, size_t destlen) | |
28 | { | |
29 | wchar_t *wcp = (wchar_t *) dest - 1; | |
30 | wint_t c; | |
8215c9ec UD |
31 | |
32 | do | |
33 | { | |
a1ffb40e | 34 | if (__glibc_unlikely (destlen-- == 0)) |
8215c9ec | 35 | __chk_fail (); |
3fa20d59 | 36 | c = *src++; |
8215c9ec UD |
37 | *++wcp = c; |
38 | } | |
39 | while (c != L'\0'); | |
40 | ||
41 | return wcp; | |
42 | } |