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 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
5e8b0e60 KB |
6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
60de5df9 EW |
16 | */ |
17 | ||
46e9ea25 | 18 | #ifndef lint |
6a1ef78a | 19 | static char sccsid[] = "@(#)wwdelete.c 3.17 (Berkeley) %G%"; |
46e9ea25 KB |
20 | #endif /* not lint */ |
21 | ||
07662491 EW |
22 | #include "ww.h" |
23 | ||
24 | /* | |
25 | * Pull w free from the cover list. | |
26 | */ | |
27 | wwdelete(w) | |
28 | register struct ww *w; | |
29 | { | |
c05972b9 EW |
30 | register i; |
31 | ||
32 | for (i = w->ww_i.t; i < w->ww_i.b; i++) { | |
33 | register j; | |
34 | register char *smap = wwsmap[i]; | |
6ef62e9e | 35 | register union ww_char *ns = wwns[i]; |
04d70db4 | 36 | register int nchanged = 0; |
84ad208b | 37 | |
84ad208b | 38 | for (j = w->ww_i.l; j < w->ww_i.r; j++) |
c05972b9 EW |
39 | if (smap[j] == w->ww_index) { |
40 | smap[j] = WWX_NOBODY; | |
41 | ns[j].c_w = ' '; | |
04d70db4 | 42 | nchanged++; |
84ad208b | 43 | } |
6a1ef78a | 44 | if (nchanged > 0) |
04d70db4 | 45 | wwtouched[i] |= WWU_TOUCHED; |
c05972b9 | 46 | } |
84ad208b | 47 | |
c05972b9 EW |
48 | { |
49 | register struct ww *wp; | |
665bc9e7 | 50 | |
c05972b9 EW |
51 | for (wp = w->ww_forw; wp != &wwhead; wp = wp->ww_forw) |
52 | wp->ww_order--; | |
53 | } | |
54 | ||
55 | if (w->ww_forw != &wwhead) | |
56 | wwdelete1(w->ww_forw, | |
57 | w->ww_i.t, w->ww_i.b, w->ww_i.l, w->ww_i.r); | |
861cd1ed | 58 | |
07662491 EW |
59 | w->ww_back->ww_forw = w->ww_forw; |
60 | w->ww_forw->ww_back = w->ww_back; | |
61 | w->ww_forw = w->ww_back = 0; | |
62 | } | |
665bc9e7 EW |
63 | |
64 | wwdelete1(w, t, b, l, r) | |
65 | register struct ww *w; | |
66 | { | |
67 | int i; | |
68 | int tt, bb, ll, rr; | |
1ceeb7e2 | 69 | char hasglass; |
665bc9e7 | 70 | |
1ceeb7e2 EW |
71 | again: |
72 | hasglass = 0; | |
665bc9e7 EW |
73 | tt = MAX(t, w->ww_i.t); |
74 | bb = MIN(b, w->ww_i.b); | |
75 | ll = MAX(l, w->ww_i.l); | |
76 | rr = MIN(r, w->ww_i.r); | |
1ceeb7e2 EW |
77 | if (tt >= bb || ll >= rr) { |
78 | if ((w = w->ww_forw) == &wwhead) | |
79 | return; | |
80 | goto again; | |
81 | } | |
665bc9e7 | 82 | for (i = tt; i < bb; i++) { |
c05972b9 | 83 | register j; |
665bc9e7 EW |
84 | register char *smap = wwsmap[i]; |
85 | register union ww_char *ns = wwns[i]; | |
86 | register char *win = w->ww_win[i]; | |
87 | register union ww_char *buf = w->ww_buf[i]; | |
88 | int nvis = w->ww_nvis[i]; | |
04d70db4 | 89 | int nchanged = 0; |
665bc9e7 EW |
90 | |
91 | for (j = ll; j < rr; j++) { | |
1ceeb7e2 EW |
92 | if (smap[j] != WWX_NOBODY) |
93 | continue; | |
94 | if (win[j] & WWM_GLS) { | |
95 | hasglass = 1; | |
665bc9e7 | 96 | continue; |
1ceeb7e2 | 97 | } |
c05972b9 EW |
98 | smap[j] = w->ww_index; |
99 | ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT; | |
04d70db4 | 100 | nchanged++; |
c05972b9 EW |
101 | if (win[j] == 0) |
102 | nvis++; | |
665bc9e7 | 103 | } |
6a1ef78a | 104 | if (nchanged > 0) |
04d70db4 | 105 | wwtouched[i] |= WWU_TOUCHED; |
665bc9e7 EW |
106 | w->ww_nvis[i] = nvis; |
107 | } | |
108 | if ((w = w->ww_forw) == &wwhead) | |
109 | return; | |
1ceeb7e2 EW |
110 | if (hasglass) |
111 | goto again; | |
665bc9e7 EW |
112 | if (tt > t) |
113 | wwdelete1(w, t, tt, l, r); | |
114 | if (bb < b) | |
115 | wwdelete1(w, bb, b, l, r); | |
116 | if (ll > l) | |
1ceeb7e2 | 117 | wwdelete1(w, tt, bb, l, ll); |
665bc9e7 | 118 | if (rr < r) |
1ceeb7e2 | 119 | wwdelete1(w, tt, bb, rr, r); |
665bc9e7 | 120 | } |