/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
/*        All Rights Reserved   */

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

/*LINTLIBRARY*/

#ifndef lint
static char
sccsid[] = "@(#)erase.c 1.6 88/02/08 SMI"; /* from UCB 5.1 85/06/07 */
#endif  /* not lint */

#include        <stddef.h>
#include        "curses.ext"

/*
 *      This routine erases everything on the window.
 */

int
werase(WINDOW *win)
{
        int     y;
        char    *sp, *end, *start, *maxx;
        ptrdiff_t       minx;

#ifdef DEBUG
        fprintf(outf, "WERASE(%0.2o)\n", win);
#endif
        for (y = 0; y < win->_maxy; y++) {
                minx = _NOCHANGE;
                start = win->_y[y];
                end = &start[win->_maxx];
                for (sp = start; sp < end; sp++)
                        if (*sp != ' ') {
                                maxx = sp;
                                if (minx == _NOCHANGE)
                                        minx = sp - start;
                                *sp = ' ';
                        }
                if (minx != _NOCHANGE)
                        (void) touchline(win, y, (int)minx,
                                (int)(maxx - win->_y[y]));
        }
        win->_curx = win->_cury = 0;
        return (OK);
}