/* $OpenBSD: lib_erase.c,v 1.3 2010/01/12 23:22:05 nicm Exp $ */

/****************************************************************************

 * Copyright (c) 1998,2000,2001 Free Software Foundation, Inc.              *

 *                                                                          *

 * Permission is hereby granted, free of charge, to any person obtaining a  *

 * copy of this software and associated documentation files (the            *

 * "Software"), to deal in the Software without restriction, including      *

 * without limitation the rights to use, copy, modify, merge, publish,      *

 * distribute, distribute with modifications, sublicense, and/or sell       *

 * copies of the Software, and to permit persons to whom the Software is    *

 * furnished to do so, subject to the following conditions:                 *

 *                                                                          *

 * The above copyright notice and this permission notice shall be included  *

 * in all copies or substantial portions of the Software.                   *

 *                                                                          *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *

 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *

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 *                                                                          *

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/****************************************************************************

 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *

 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *

 *     and: Thomas E. Dickey                        1996-on                 *

 ****************************************************************************/

/*

**	lib_erase.c

**

**	The routine werase().

**

*/

#include <curses.priv.h>

MODULE_ID("$Id: lib_erase.c,v 1.3 2010/01/12 23:22:05 nicm Exp $")

NCURSES_EXPORT(int)

werase(WINDOW *win)

{

    int y;

    NCURSES_CH_T blank;

    NCURSES_CH_T *sp, *end, *start;

    T((T_CALLED("werase(%p)"), win));

	    /*

	     * If this is a derived window, we have to handle the case where

	     * a multicolumn character extends into the window that we are

	     * erasing.

	     */

		if (isWidecExt(start[0])) {

		    int x = (win->_parent != 0) ? (win->_begx) : 0;

		    while (x-- > 0) {

			if (isWidecBase(start[-1])) {

			    --start;

			    break;

			}

			--start;

		    }

		}

	    });

	}

    }

}