1  /* Copyright (C) 1996-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library.  If not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  /* The generic version of this file assumes that __alignof__(wchar_t) ==
      19     sizeof (wchar_t).  We therefore use this port-specific implementation
      20     instead.  */
      21  #include <wchar.h>
      22  
      23  /* Copy SRC to DEST, returning the address of the terminating L'\0' in
      24     DEST.  Check for overflows.  */
      25  wchar_t *
      26  __wcpcpy_chk (wchar_t *dest, const wchar_t *src, size_t destlen)
      27  {
      28    do
      29      if (destlen-- == 0)
      30        __chk_fail ();
      31    while ((*dest++ = *src++));
      32  
      33    return dest - 1;
      34  }