/* Copyright (C) 1996-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996. 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 <http://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; }