Annotation of src/usr.bin/window/wwadd.c, Revision 1.1.1.1
1.1 deraadt 1: /* $NetBSD: wwadd.c,v 1.3 1995/09/28 10:35:09 tls 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: #ifndef lint
40: #if 0
41: static char sccsid[] = "@(#)wwadd.c 8.1 (Berkeley) 6/6/93";
42: #else
43: static char rcsid[] = "$NetBSD: wwadd.c,v 1.3 1995/09/28 10:35:09 tls Exp $";
44: #endif
45: #endif /* not lint */
46:
47: #include "ww.h"
48:
49: /*
50: * Stick w1 behind w2.
51: */
52: wwadd(w1, w2)
53: register struct ww *w1;
54: struct ww *w2;
55: {
56: register i;
57: register struct ww *w;
58:
59: w1->ww_order = w2->ww_order + 1;
60: w1->ww_back = w2;
61: w1->ww_forw = w2->ww_forw;
62: w2->ww_forw->ww_back = w1;
63: w2->ww_forw = w1;
64:
65: for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw)
66: w->ww_order++;
67: for (i = w1->ww_i.t; i < w1->ww_i.b; i++) {
68: register j;
69: register char *smap = wwsmap[i];
70: register char *win = w1->ww_win[i];
71: union ww_char *ns = wwns[i];
72: union ww_char *buf = w1->ww_buf[i];
73: int nvis = 0;
74: int nchanged = 0;
75:
76: for (j = w1->ww_i.l; j < w1->ww_i.r; j++) {
77: w = wwindex[smap[j]];
78: if (w1->ww_order > w->ww_order)
79: continue;
80: if (win[j] & WWM_GLS)
81: continue;
82: if (w != &wwnobody && w->ww_win[i][j] == 0)
83: w->ww_nvis[i]--;
84: smap[j] = w1->ww_index;
85: if (win[j] == 0)
86: nvis++;
87: ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
88: nchanged++;
89: }
90: if (nchanged > 0)
91: wwtouched[i] |= WWU_TOUCHED;
92: w1->ww_nvis[i] = nvis;
93: }
94: }