1: /* Copyright (C) 1995, 1996, 1997, 2003, 2005 Free Software Foundation, Inc.
    2:    This file is part of the GNU C Library.
    3:    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
    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
   16:    License along with the GNU C Library; if not, write to the Free
   17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   18:    02111-1307 USA.  */
   19: 
   20: #include <stddef.h>
   21: #include <wchar.h>
   22: 
   23: 
   24: /* Copy SRC to DEST.  */
   25: wchar_t *
   26: __wcscpy_chk (wchar_t *dest, const wchar_t *src, size_t n)
   27: {
   28:   wint_t c;
   29:   wchar_t *wcp;
   30: 
   31:   if (__alignof__ (wchar_t) >= sizeof (wchar_t))
   32:     {
   33:       const ptrdiff_t off = dest - src - 1;
   34: 
   35:       wcp = (wchar_t *) src;
   36: 
   37:       do
   38:         {
   39:           if (__builtin_expect (n-- == 0, 0))
   40:             __chk_fail ();
   41:           c = *wcp++;
   42:           wcp[off] = c;
   43:         }
   44:       while (c != L'\0');
   45:     }
   46:   else
   47:     {
   48:       wcp = dest;
   49: 
   50:       do
   51:         {
   52:           if (__builtin_expect (n-- == 0, 0))
   53:             __chk_fail ();
   54:           c = *src++;
   55:           *wcp++ = c;
   56:         }
   57:       while (c != L'\0');
   58:     }
   59: 
   60:   return dest;
   61: }