/* wcscpy.c - Wide Character Copy for POWER6+.

   Copyright (C) 2012-2018 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; see the file COPYING.LIB.  If

   not, see <http://www.gnu.org/licenses/>.  */

#include <stddef.h>

#include <wchar.h>

#ifndef WCSCPY

# define WCSCPY wcscpy

#endif

/* Copy SRC to DEST.  */

wchar_t *

WCSCPY (wchar_t *dest, const wchar_t *src)

{

  wint_t c,d;

  wchar_t *wcp, *wcp2;

  if (__alignof__ (wchar_t) >= sizeof (wchar_t))

    {

      const ptrdiff_t off = dest - src;

      wcp = (wchar_t *) src;

      wcp2 = wcp + 1 ;

      do

        {

          d = *wcp;

          wcp[off] = d;

          if (d == L'\0')

            return dest;

          wcp += 2;

          c = *wcp2;

          wcp2[off] = c;

          if (c == L'\0')

            return dest;

          wcp2 += 2;

          d = *wcp;

          wcp[off] = d;

          if (d == L'\0')

            return dest;

          wcp += 2;

          c = *wcp2;

          wcp2[off] = c;

          if (c == L'\0')

            return dest;

          wcp2 += 2;

          d = *wcp;

          wcp[off] = d;

          if (d == L'\0')

            return dest;

          wcp += 2;

          c = *wcp2;

          wcp2[off] = c;

          if (c == L'\0')

            return dest;

          wcp2 += 2;

          d = *wcp;

          wcp[off] = d;

          if (d == L'\0')

            return dest;

          wcp += 2;

          c = *wcp2;

          wcp2[off] = c;

          if (c == L'\0')

            return dest;

          wcp2 += 2;

        }

      while (c != L'\0');

    }

  else

    {

      wcp = dest;

      do

        {

          c = *src++;

          *wcp++ = c;

        }

      while (c != L'\0');

    }

  return dest;

}