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1 /* $NetBSD: wwadd.c,v 1.5 1997/11/21 08:36:54 lukem 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. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
38
39 #include <sys/cdefs.h>
40 #ifndef lint
41 #if 0
42 static char sccsid[] = "@(#)wwadd.c 8.1 (Berkeley) 6/6/93";
43 #else
44 __RCSID("$NetBSD: wwadd.c,v 1.5 1997/11/21 08:36:54 lukem Exp $");
45 #endif
46 #endif /* not lint */
47
48 #include "ww.h"
49
50 /*
51 * Stick w1 behind w2.
52 */
53 void
54 wwadd(w1, w2)
55 struct ww *w1;
56 struct ww *w2;
57 {
58 int i;
59 struct ww *w;
60
61 w1->ww_order = w2->ww_order + 1;
62 w1->ww_back = w2;
63 w1->ww_forw = w2->ww_forw;
64 w2->ww_forw->ww_back = w1;
65 w2->ww_forw = w1;
66
67 for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw)
68 w->ww_order++;
69 for (i = w1->ww_i.t; i < w1->ww_i.b; i++) {
70 int j;
71 unsigned char *smap = wwsmap[i];
72 char *win = w1->ww_win[i];
73 union ww_char *ns = wwns[i];
74 union ww_char *buf = w1->ww_buf[i];
75 int nvis = 0;
76 int nchanged = 0;
77
78 for (j = w1->ww_i.l; j < w1->ww_i.r; j++) {
79 w = wwindex[smap[j]];
80 if (w1->ww_order > w->ww_order)
81 continue;
82 if (win[j] & WWM_GLS)
83 continue;
84 if (w != &wwnobody && w->ww_win[i][j] == 0)
85 w->ww_nvis[i]--;
86 smap[j] = w1->ww_index;
87 if (win[j] == 0)
88 nvis++;
89 ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
90 nchanged++;
91 }
92 if (nchanged > 0)
93 wwtouched[i] |= WWU_TOUCHED;
94 w1->ww_nvis[i] = nvis;
95 }
96 }