44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
/* Copyright (C) 1996-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <wchar.h>
|
|
|
|
#define __need_ptrdiff_t
|
|
#include <stddef.h>
|
|
|
|
|
|
/* Copy SRC to DEST, returning the address of the terminating L'\0' in
|
|
DEST. Check for overflows. */
|
|
wchar_t *
|
|
__wcpcpy_chk (wchar_t *dest, const wchar_t *src, size_t destlen)
|
|
{
|
|
wchar_t *wcp = (wchar_t *) dest - 1;
|
|
wint_t c;
|
|
const ptrdiff_t off = src - dest + 1;
|
|
|
|
do
|
|
{
|
|
if (__glibc_unlikely (destlen-- == 0))
|
|
__chk_fail ();
|
|
c = wcp[off];
|
|
*++wcp = c;
|
|
}
|
|
while (c != L'\0');
|
|
|
|
return wcp;
|
|
}
|