| /* Copyright (C) 1995-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995. |
| |
| 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> |
| |
| |
| /* Append SRC on the end of DEST. Check for overflows. */ |
| wchar_t * |
| __wcscat_chk (wchar_t *dest, const wchar_t *src, size_t destlen) |
| { |
| wchar_t *s1 = dest; |
| const wchar_t *s2 = src; |
| wchar_t c; |
| |
| /* Find the end of the string. */ |
| do |
| { |
| if (__builtin_expect (destlen-- == 0, 0)) |
| __chk_fail (); |
| c = *s1++; |
| } |
| while (c != L'\0'); |
| |
| /* Make S1 point before the next character, so we can increment |
| it while memory is read (wins on pipelined cpus). */ |
| s1 -= 2; |
| ++destlen; |
| |
| do |
| { |
| if (__builtin_expect (destlen-- == 0, 0)) |
| __chk_fail (); |
| c = *s2++; |
| *++s1 = c; |
| } |
| while (c != L'\0'); |
| |
| return dest; |
| } |