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glibc  2.9
wcpcpy_chk.c
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00001 /* Copyright (C) 1996, 1997, 2005, 2006 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 /* The generic version of this file assumes that __alignof__(wchar_t) ==
00021    sizeof (wchar_t).  We therefore use this port-specific implementation
00022    instead.  */
00023 #include <wchar.h>
00024 
00025 /* Copy SRC to DEST, returning the address of the terminating L'\0' in
00026    DEST.  Check for overflows.  */
00027 wchar_t *
00028 __wcpcpy_chk (wchar_t *dest, const wchar_t *src, size_t destlen)
00029 {
00030   do
00031     if (destlen-- == 0)
00032       __chk_fail ();
00033   while ((*dest++ = *src++));
00034 
00035   return dest - 1;
00036 }