1/*
2 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
3 * Use is subject to license terms.
4 */
5
6/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
7/*	  All Rights Reserved  	*/
8
9/*
10 * Copyright (c) 1980 Regents of the University of California.
11 * All rights reserved.  The Berkeley software License Agreement
12 * specifies the terms and conditions for redistribution.
13 */
14
15#pragma ident	"%Z%%M%	%I%	%E% SMI"
16
17/*LINTLIBRARY*/
18
19#ifndef lint
20static char
21sccsid[] = "@(#)erase.c 1.6 88/02/08 SMI"; /* from UCB 5.1 85/06/07 */
22#endif	/* not lint */
23
24#include	<stddef.h>
25#include	"curses.ext"
26
27/*
28 *	This routine erases everything on the window.
29 */
30
31int
32werase(WINDOW *win)
33{
34	int	y;
35	char	*sp, *end, *start, *maxx;
36	ptrdiff_t	minx;
37
38#ifdef DEBUG
39	fprintf(outf, "WERASE(%0.2o)\n", win);
40#endif
41	for (y = 0; y < win->_maxy; y++) {
42		minx = _NOCHANGE;
43		start = win->_y[y];
44		end = &start[win->_maxx];
45		for (sp = start; sp < end; sp++)
46			if (*sp != ' ') {
47				maxx = sp;
48				if (minx == _NOCHANGE)
49					minx = sp - start;
50				*sp = ' ';
51			}
52		if (minx != _NOCHANGE)
53			(void) touchline(win, y, (int)minx,
54				(int)(maxx - win->_y[y]));
55	}
56	win->_curx = win->_cury = 0;
57	return (OK);
58}
59