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60de5df9 | 1 | /* |
46e9ea25 KB |
2 | * Copyright (c) 1983 Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
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5 | * This code is derived from software contributed to Berkeley by |
6 | * Edward Wang at The University of California, Berkeley. | |
7 | * | |
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8 | * Redistribution and use in source and binary forms, with or without |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. All advertising materials mentioning features or use of this software | |
17 | * must display the following acknowledgement: | |
18 | * This product includes software developed by the University of | |
19 | * California, Berkeley and its contributors. | |
20 | * 4. Neither the name of the University nor the names of its contributors | |
21 | * may be used to endorse or promote products derived from this software | |
22 | * without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | * SUCH DAMAGE. | |
60de5df9 EW |
35 | */ |
36 | ||
46e9ea25 | 37 | #ifndef lint |
1c15e888 | 38 | static char sccsid[] = "@(#)wwadd.c 3.14 (Berkeley) 6/6/90"; |
46e9ea25 KB |
39 | #endif /* not lint */ |
40 | ||
7c1c9e39 EW |
41 | #include "ww.h" |
42 | ||
43 | /* | |
84ad208b | 44 | * Stick w1 behind w2. |
7c1c9e39 EW |
45 | */ |
46 | wwadd(w1, w2) | |
84ad208b EW |
47 | register struct ww *w1; |
48 | struct ww *w2; | |
7c1c9e39 | 49 | { |
84ad208b | 50 | register i; |
04d70db4 | 51 | register struct ww *w; |
19f9784c | 52 | |
7c1c9e39 EW |
53 | w1->ww_order = w2->ww_order + 1; |
54 | w1->ww_back = w2; | |
55 | w1->ww_forw = w2->ww_forw; | |
56 | w2->ww_forw->ww_back = w1; | |
57 | w2->ww_forw = w1; | |
19f9784c | 58 | |
84ad208b EW |
59 | for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw) |
60 | w->ww_order++; | |
61 | for (i = w1->ww_i.t; i < w1->ww_i.b; i++) { | |
04d70db4 EW |
62 | register j; |
63 | register char *smap = wwsmap[i]; | |
64 | register char *win = w1->ww_win[i]; | |
65 | union ww_char *ns = wwns[i]; | |
66 | union ww_char *buf = w1->ww_buf[i]; | |
84ad208b | 67 | int nvis = 0; |
04d70db4 | 68 | int nchanged = 0; |
7c1c9e39 | 69 | |
84ad208b | 70 | for (j = w1->ww_i.l; j < w1->ww_i.r; j++) { |
04d70db4 EW |
71 | w = wwindex[smap[j]]; |
72 | if (w1->ww_order > w->ww_order) | |
84ad208b | 73 | continue; |
04d70db4 | 74 | if (win[j] & WWM_GLS) |
84ad208b | 75 | continue; |
84ad208b EW |
76 | if (w != &wwnobody && w->ww_win[i][j] == 0) |
77 | w->ww_nvis[i]--; | |
04d70db4 EW |
78 | smap[j] = w1->ww_index; |
79 | if (win[j] == 0) | |
84ad208b | 80 | nvis++; |
04d70db4 EW |
81 | ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT; |
82 | nchanged++; | |
7c1c9e39 | 83 | } |
6a1ef78a | 84 | if (nchanged > 0) |
04d70db4 | 85 | wwtouched[i] |= WWU_TOUCHED; |
84ad208b | 86 | w1->ww_nvis[i] = nvis; |
7c1c9e39 EW |
87 | } |
88 | } |