Commit | Line | Data |
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60de5df9 | 1 | /* |
46e9ea25 KB |
2 | * Copyright (c) 1983 Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
3dd3a9e5 KB |
5 | * This code is derived from software contributed to Berkeley by |
6 | * Edward Wang at The University of California, Berkeley. | |
7 | * | |
87f529ec | 8 | * %sccs.include.redist.c% |
60de5df9 EW |
9 | */ |
10 | ||
46e9ea25 | 11 | #ifndef lint |
3dd3a9e5 | 12 | static char sccsid[] = "@(#)wwadd.c 3.14 (Berkeley) %G%"; |
46e9ea25 KB |
13 | #endif /* not lint */ |
14 | ||
7c1c9e39 EW |
15 | #include "ww.h" |
16 | ||
17 | /* | |
84ad208b | 18 | * Stick w1 behind w2. |
7c1c9e39 EW |
19 | */ |
20 | wwadd(w1, w2) | |
84ad208b EW |
21 | register struct ww *w1; |
22 | struct ww *w2; | |
7c1c9e39 | 23 | { |
84ad208b | 24 | register i; |
04d70db4 | 25 | register struct ww *w; |
19f9784c | 26 | |
7c1c9e39 EW |
27 | w1->ww_order = w2->ww_order + 1; |
28 | w1->ww_back = w2; | |
29 | w1->ww_forw = w2->ww_forw; | |
30 | w2->ww_forw->ww_back = w1; | |
31 | w2->ww_forw = w1; | |
19f9784c | 32 | |
84ad208b EW |
33 | for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw) |
34 | w->ww_order++; | |
35 | for (i = w1->ww_i.t; i < w1->ww_i.b; i++) { | |
04d70db4 EW |
36 | register j; |
37 | register char *smap = wwsmap[i]; | |
38 | register char *win = w1->ww_win[i]; | |
39 | union ww_char *ns = wwns[i]; | |
40 | union ww_char *buf = w1->ww_buf[i]; | |
84ad208b | 41 | int nvis = 0; |
04d70db4 | 42 | int nchanged = 0; |
7c1c9e39 | 43 | |
84ad208b | 44 | for (j = w1->ww_i.l; j < w1->ww_i.r; j++) { |
04d70db4 EW |
45 | w = wwindex[smap[j]]; |
46 | if (w1->ww_order > w->ww_order) | |
84ad208b | 47 | continue; |
04d70db4 | 48 | if (win[j] & WWM_GLS) |
84ad208b | 49 | continue; |
84ad208b EW |
50 | if (w != &wwnobody && w->ww_win[i][j] == 0) |
51 | w->ww_nvis[i]--; | |
04d70db4 EW |
52 | smap[j] = w1->ww_index; |
53 | if (win[j] == 0) | |
84ad208b | 54 | nvis++; |
04d70db4 EW |
55 | ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT; |
56 | nchanged++; | |
7c1c9e39 | 57 | } |
6a1ef78a | 58 | if (nchanged > 0) |
04d70db4 | 59 | wwtouched[i] |= WWU_TOUCHED; |
84ad208b | 60 | w1->ww_nvis[i] = nvis; |
7c1c9e39 EW |
61 | } |
62 | } |