glibc/sysdeps/m68k/wcpcpy_chk.c

/* Copyright (C) 1996-2023 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   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
   <https://www.gnu.org/licenses/>.  */

/* The generic version of this file assumes that __alignof__(wchar_t) ==
   sizeof (wchar_t).  We therefore use this port-specific implementation
   instead.  */
#include <wchar.h>

/* Copy SRC to DEST, returning the address of the terminating L'\0' in
   DEST.  Check for overflows.  */
wchar_t *
__wcpcpy_chk (wchar_t *dest, const wchar_t *src, size_t destlen)
{
  do
    if (destlen-- == 0)
      __chk_fail ();
  while ((*dest++ = *src++));

  return dest - 1;
}