glibc/wcsmbs/wcscpy.c

/* Copyright (C) 1995, 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.	 If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <wchar.h>

#define __need_ptrdiff_t
#include <stddef.h>


/* Copy SRC to DEST.  */
wchar_t *
wcscpy (dest, src)
     wchar_t *dest;
     const wchar_t *src;
{
  wchar_t *wcp = (wchar_t *) src;
  wchar_t c;
  const ptrdiff_t off = dest - src - 1;

  do
    {
      c = *wcp++;
      wcp[off] = c;
    }
  while (c != L'\0');

  return dest;
}