window(1): Remove __RCSID & friends.
[dragonfly.git] / usr.bin / window / wwadd.c
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2c872e05 1/* @(#)wwadd.c 8.1 (Berkeley) 6/6/93 */
abecab39
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2/* $NetBSD: wwadd.c,v 1.7 2003/08/07 11:17:35 agc Exp $ */
3
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4/*
5 * Copyright (c) 1983, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Edward Wang at The University of California, Berkeley.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
abecab39 19 * 3. Neither the name of the University nor the names of its contributors
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20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
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36#include "ww.h"
37
38/*
39 * Stick w1 behind w2.
40 */
abecab39
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41void
42wwadd(struct ww *w1, struct ww *w2)
984263bc 43{
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44 int i;
45 struct ww *w;
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46
47 w1->ww_order = w2->ww_order + 1;
48 w1->ww_back = w2;
49 w1->ww_forw = w2->ww_forw;
50 w2->ww_forw->ww_back = w1;
51 w2->ww_forw = w1;
52
53 for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw)
54 w->ww_order++;
55 for (i = w1->ww_i.t; i < w1->ww_i.b; i++) {
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56 int j;
57 unsigned char *smap = wwsmap[i];
58 char *win = w1->ww_win[i];
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59 union ww_char *ns = wwns[i];
60 union ww_char *buf = w1->ww_buf[i];
61 int nvis = 0;
62 int nchanged = 0;
63
64 for (j = w1->ww_i.l; j < w1->ww_i.r; j++) {
65 w = wwindex[smap[j]];
66 if (w1->ww_order > w->ww_order)
67 continue;
68 if (win[j] & WWM_GLS)
69 continue;
70 if (w != &wwnobody && w->ww_win[i][j] == 0)
71 w->ww_nvis[i]--;
72 smap[j] = w1->ww_index;
73 if (win[j] == 0)
74 nvis++;
75 ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
76 nchanged++;
77 }
78 if (nchanged > 0)
79 wwtouched[i] |= WWU_TOUCHED;
80 w1->ww_nvis[i] = nvis;
81 }
82}