sysdeps/m68k/wcpcpy_chk.c

   1 /* Copyright (C) 1996-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
   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, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 /* The generic version of this file assumes that __alignof__(wchar_t) ==
  20    sizeof (wchar_t).  We therefore use this port-specific implementation
  21    instead.  */
  22 #include <wchar.h>
  23
  24 /* Copy SRC to DEST, returning the address of the terminating L'\0' in
  25    DEST.  Check for overflows.  */
  26 wchar_t *
  27 __wcpcpy_chk (wchar_t *dest, const wchar_t *src, size_t destlen)
  28 {
  29   do
  30     if (destlen-- == 0)
  31       __chk_fail ();
  32   while ((*dest++ = *src++));
  33
  34   return dest - 1;
  35 }