1/*	$NetBSD: wwclreol.c,v 1.6 2002/06/14 01:06:57 wiz Exp $	*/
2
3/*
4 * Copyright (c) 1983, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Edward Wang at The University of California, Berkeley.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <sys/cdefs.h>
36#ifndef lint
37#if 0
38static char sccsid[] = "@(#)wwclreol.c	8.1 (Berkeley) 6/6/93";
39#else
40__RCSID("$NetBSD: wwclreol.c,v 1.6 2002/06/14 01:06:57 wiz Exp $");
41#endif
42#endif /* not lint */
43
44#include "ww.h"
45#include "tt.h"
46
47/*
48 * Clear w to the end of line.
49 * If cleared is true, then the screen line has already been cleared.
50 */
51void
52wwclreol1(struct ww *w, int row, int col, char cleared)
53{
54	int i;
55
56	/*
57	 * Clear the buffer right off
58	 */
59	{
60		union ww_char *buf;
61
62		buf = &w->ww_buf[row][col];
63		for (i = w->ww_b.r - col; --i >= 0;)
64			buf++->c_w = ' ';
65	}
66
67	/*
68	 * If can't see it, just return.
69	 */
70	if (row < w->ww_i.t || row >= w->ww_i.b
71	    || w->ww_i.r <= 0 || w->ww_i.r <= col)
72		return;
73
74	if (col < w->ww_i.l)
75		col = w->ww_i.l;
76
77	/*
78	 * Now fix wwns.
79	 */
80	{
81		union ww_char *s;
82		unsigned char *smap;
83		char *win;
84
85		i = col;
86		smap = &wwsmap[row][i];
87		s = &wwns[row][i];
88		win = &w->ww_win[row][i];
89		for (i = w->ww_i.r - i; --i >= 0;)
90			if (*smap++ == w->ww_index)
91				s++->c_w = ' ' | *win++ << WWC_MSHIFT;
92			else
93				s++, win++;
94	}
95	if (!cleared)
96		wwtouched[row] |= WWU_TOUCHED;
97}
98