1*86d7f5d3SJohn Marino /* @(#)wwadd.c 8.1 (Berkeley) 6/6/93 */
2*86d7f5d3SJohn Marino /* $NetBSD: wwadd.c,v 1.7 2003/08/07 11:17:35 agc Exp $ */
3*86d7f5d3SJohn Marino
4*86d7f5d3SJohn Marino /*
5*86d7f5d3SJohn Marino * Copyright (c) 1983, 1993
6*86d7f5d3SJohn Marino * The Regents of the University of California. All rights reserved.
7*86d7f5d3SJohn Marino *
8*86d7f5d3SJohn Marino * This code is derived from software contributed to Berkeley by
9*86d7f5d3SJohn Marino * Edward Wang at The University of California, Berkeley.
10*86d7f5d3SJohn Marino *
11*86d7f5d3SJohn Marino * Redistribution and use in source and binary forms, with or without
12*86d7f5d3SJohn Marino * modification, are permitted provided that the following conditions
13*86d7f5d3SJohn Marino * are met:
14*86d7f5d3SJohn Marino * 1. Redistributions of source code must retain the above copyright
15*86d7f5d3SJohn Marino * notice, this list of conditions and the following disclaimer.
16*86d7f5d3SJohn Marino * 2. Redistributions in binary form must reproduce the above copyright
17*86d7f5d3SJohn Marino * notice, this list of conditions and the following disclaimer in the
18*86d7f5d3SJohn Marino * documentation and/or other materials provided with the distribution.
19*86d7f5d3SJohn Marino * 3. Neither the name of the University nor the names of its contributors
20*86d7f5d3SJohn Marino * may be used to endorse or promote products derived from this software
21*86d7f5d3SJohn Marino * without specific prior written permission.
22*86d7f5d3SJohn Marino *
23*86d7f5d3SJohn Marino * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24*86d7f5d3SJohn Marino * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25*86d7f5d3SJohn Marino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26*86d7f5d3SJohn Marino * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27*86d7f5d3SJohn Marino * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28*86d7f5d3SJohn Marino * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29*86d7f5d3SJohn Marino * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30*86d7f5d3SJohn Marino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31*86d7f5d3SJohn Marino * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32*86d7f5d3SJohn Marino * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33*86d7f5d3SJohn Marino * SUCH DAMAGE.
34*86d7f5d3SJohn Marino */
35*86d7f5d3SJohn Marino
36*86d7f5d3SJohn Marino #include "ww.h"
37*86d7f5d3SJohn Marino
38*86d7f5d3SJohn Marino /*
39*86d7f5d3SJohn Marino * Stick w1 behind w2.
40*86d7f5d3SJohn Marino */
41*86d7f5d3SJohn Marino void
wwadd(struct ww * w1,struct ww * w2)42*86d7f5d3SJohn Marino wwadd(struct ww *w1, struct ww *w2)
43*86d7f5d3SJohn Marino {
44*86d7f5d3SJohn Marino int i;
45*86d7f5d3SJohn Marino struct ww *w;
46*86d7f5d3SJohn Marino
47*86d7f5d3SJohn Marino w1->ww_order = w2->ww_order + 1;
48*86d7f5d3SJohn Marino w1->ww_back = w2;
49*86d7f5d3SJohn Marino w1->ww_forw = w2->ww_forw;
50*86d7f5d3SJohn Marino w2->ww_forw->ww_back = w1;
51*86d7f5d3SJohn Marino w2->ww_forw = w1;
52*86d7f5d3SJohn Marino
53*86d7f5d3SJohn Marino for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw)
54*86d7f5d3SJohn Marino w->ww_order++;
55*86d7f5d3SJohn Marino for (i = w1->ww_i.t; i < w1->ww_i.b; i++) {
56*86d7f5d3SJohn Marino int j;
57*86d7f5d3SJohn Marino unsigned char *smap = wwsmap[i];
58*86d7f5d3SJohn Marino char *win = w1->ww_win[i];
59*86d7f5d3SJohn Marino union ww_char *ns = wwns[i];
60*86d7f5d3SJohn Marino union ww_char *buf = w1->ww_buf[i];
61*86d7f5d3SJohn Marino int nvis = 0;
62*86d7f5d3SJohn Marino int nchanged = 0;
63*86d7f5d3SJohn Marino
64*86d7f5d3SJohn Marino for (j = w1->ww_i.l; j < w1->ww_i.r; j++) {
65*86d7f5d3SJohn Marino w = wwindex[smap[j]];
66*86d7f5d3SJohn Marino if (w1->ww_order > w->ww_order)
67*86d7f5d3SJohn Marino continue;
68*86d7f5d3SJohn Marino if (win[j] & WWM_GLS)
69*86d7f5d3SJohn Marino continue;
70*86d7f5d3SJohn Marino if (w != &wwnobody && w->ww_win[i][j] == 0)
71*86d7f5d3SJohn Marino w->ww_nvis[i]--;
72*86d7f5d3SJohn Marino smap[j] = w1->ww_index;
73*86d7f5d3SJohn Marino if (win[j] == 0)
74*86d7f5d3SJohn Marino nvis++;
75*86d7f5d3SJohn Marino ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
76*86d7f5d3SJohn Marino nchanged++;
77*86d7f5d3SJohn Marino }
78*86d7f5d3SJohn Marino if (nchanged > 0)
79*86d7f5d3SJohn Marino wwtouched[i] |= WWU_TOUCHED;
80*86d7f5d3SJohn Marino w1->ww_nvis[i] = nvis;
81*86d7f5d3SJohn Marino }
82*86d7f5d3SJohn Marino }
83