1 /* $NetBSD: wwdelchar.c,v 1.7 2003/08/07 11:17:38 agc Exp $ */
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Edward Wang at The University of California, Berkeley.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
35 #include <sys/cdefs.h>
38 static char sccsid[] = "@(#)wwdelchar.c 8.1 (Berkeley) 6/6/93";
40 __RCSID("$NetBSD: wwdelchar.c,v 1.7 2003/08/07 11:17:38 agc Exp $");
49 wwdelchar(struct ww *w, int row, int col)
55 * First, shift the line.
60 p = &w->ww_buf[row][col];
62 for (i = w->ww_b.r - col; --i > 0;)
68 * If can't see it, just return.
70 if (row < w->ww_i.t || row >= w->ww_i.b
71 || w->ww_i.r <= 0 || w->ww_i.r <= col)
78 * Now find out how much is actually changed, and fix wwns.
88 smap = &wwsmap[row][col];
89 for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++)
97 smap = &wwsmap[row][i];
98 touched = wwtouched[row];
99 for (; i < w->ww_i.r; i++) {
100 if (*smap++ != w->ww_index)
102 touched |= WWU_TOUCHED;
105 buf[i].c_w ^ win[i] << WWC_MSHIFT;
111 wwtouched[row] = touched;
115 * Can/Should we use delete character?
117 if (tt.tt_delchar != 0 && nvis > (wwncol - col) / 2) {
118 union ww_char *p, *q;
123 for (i = wwncol - col; --i > 0;)