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b168057a | 1 | /* Copyright (C) 1996-2015 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996. | |
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 | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
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18 | |
19 | #include <wchar.h> | |
20 | ||
21 | #define __need_ptrdiff_t | |
22 | #include <stddef.h> | |
23 | ||
24 | ||
25 | /* Copy SRC to DEST, returning the address of the terminating L'\0' in | |
26 | DEST. Check for overflows. */ | |
27 | wchar_t * | |
28 | __wcpcpy_chk (wchar_t *dest, const wchar_t *src, size_t destlen) | |
29 | { | |
30 | wchar_t *wcp = (wchar_t *) dest - 1; | |
31 | wint_t c; | |
32 | const ptrdiff_t off = src - dest + 1; | |
33 | ||
34 | do | |
35 | { | |
a1ffb40e | 36 | if (__glibc_unlikely (destlen-- == 0)) |
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37 | __chk_fail (); |
38 | c = wcp[off]; | |
39 | *++wcp = c; | |
40 | } | |
41 | while (c != L'\0'); | |
42 | ||
43 | return wcp; | |
44 | } |