projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 07662491 | 1 | #ifndef lint |
| 60de5df9 | 2 | static char sccsid[] = "@(#)wwdelete.c 3.13 %G%"; |
| 07662491 EW |
3 | #endif |
| 4 | ||
| 60de5df9 EW |
5 | /* |
| 6 | * Copyright (c) 1983 Regents of the University of California, | |
| 7 | * All rights reserved. Redistribution permitted subject to | |
| 8 | * the terms of the Berkeley Software License Agreement. | |
| 9 | */ | |
| 10 | ||
| 07662491 EW |
11 | #include "ww.h" |
| 12 | ||
| 13 | /* | |
| 14 | * Pull w free from the cover list. | |
| 15 | */ | |
| 16 | wwdelete(w) | |
| 17 | register struct ww *w; | |
| 18 | { | |
| c05972b9 EW |
19 | register i; |
| 20 | ||
| 21 | for (i = w->ww_i.t; i < w->ww_i.b; i++) { | |
| 22 | register j; | |
| 23 | register char *smap = wwsmap[i]; | |
| 24 | register struct ww_char *ns = wwns[i]; | |
| 04d70db4 | 25 | register int nchanged = 0; |
| 84ad208b | 26 | |
| 84ad208b | 27 | for (j = w->ww_i.l; j < w->ww_i.r; j++) |
| c05972b9 EW |
28 | if (smap[j] == w->ww_index) { |
| 29 | smap[j] = WWX_NOBODY; | |
| 30 | ns[j].c_w = ' '; | |
| 04d70db4 | 31 | nchanged++; |
| 84ad208b | 32 | } |
| 04d70db4 EW |
33 | if (nchanged > 4) |
| 34 | wwtouched[i] |= WWU_MAJOR|WWU_TOUCHED; | |
| 35 | else if (nchanged > 0) | |
| 36 | wwtouched[i] |= WWU_TOUCHED; | |
| c05972b9 | 37 | } |
| 84ad208b | 38 | |
| c05972b9 EW |
39 | { |
| 40 | register struct ww *wp; | |
| 665bc9e7 | 41 | |
| c05972b9 EW |
42 | for (wp = w->ww_forw; wp != &wwhead; wp = wp->ww_forw) |
| 43 | wp->ww_order--; | |
| 44 | } | |
| 45 | ||
| 46 | if (w->ww_forw != &wwhead) | |
| 47 | wwdelete1(w->ww_forw, | |
| 48 | w->ww_i.t, w->ww_i.b, w->ww_i.l, w->ww_i.r); | |
| 861cd1ed | 49 | |
| 07662491 EW |
50 | w->ww_back->ww_forw = w->ww_forw; |
| 51 | w->ww_forw->ww_back = w->ww_back; | |
| 52 | w->ww_forw = w->ww_back = 0; | |
| 53 | } | |
| 665bc9e7 EW |
54 | |
| 55 | wwdelete1(w, t, b, l, r) | |
| 56 | register struct ww *w; | |
| 57 | { | |
| 58 | int i; | |
| 59 | int tt, bb, ll, rr; | |
| 1ceeb7e2 | 60 | char hasglass; |
| 665bc9e7 | 61 | |
| 1ceeb7e2 EW |
62 | again: |
| 63 | hasglass = 0; | |
| 665bc9e7 EW |
64 | tt = MAX(t, w->ww_i.t); |
| 65 | bb = MIN(b, w->ww_i.b); | |
| 66 | ll = MAX(l, w->ww_i.l); | |
| 67 | rr = MIN(r, w->ww_i.r); | |
| 1ceeb7e2 EW |
68 | if (tt >= bb || ll >= rr) { |
| 69 | if ((w = w->ww_forw) == &wwhead) | |
| 70 | return; | |
| 71 | goto again; | |
| 72 | } | |
| 665bc9e7 | 73 | for (i = tt; i < bb; i++) { |
| c05972b9 | 74 | register j; |
| 665bc9e7 EW |
75 | register char *smap = wwsmap[i]; |
| 76 | register union ww_char *ns = wwns[i]; | |
| 77 | register char *win = w->ww_win[i]; | |
| 78 | register union ww_char *buf = w->ww_buf[i]; | |
| 79 | int nvis = w->ww_nvis[i]; | |
| 04d70db4 | 80 | int nchanged = 0; |
| 665bc9e7 EW |
81 | |
| 82 | for (j = ll; j < rr; j++) { | |
| 1ceeb7e2 EW |
83 | if (smap[j] != WWX_NOBODY) |
| 84 | continue; | |
| 85 | if (win[j] & WWM_GLS) { | |
| 86 | hasglass = 1; | |
| 665bc9e7 | 87 | continue; |
| 1ceeb7e2 | 88 | } |
| c05972b9 EW |
89 | smap[j] = w->ww_index; |
| 90 | ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT; | |
| 04d70db4 | 91 | nchanged++; |
| c05972b9 EW |
92 | if (win[j] == 0) |
| 93 | nvis++; | |
| 665bc9e7 | 94 | } |
| 04d70db4 EW |
95 | if (nchanged > 4) |
| 96 | wwtouched[i] |= WWU_MAJOR|WWU_TOUCHED; | |
| 97 | else if (nchanged > 0) | |
| 98 | wwtouched[i] |= WWU_TOUCHED; | |
| 665bc9e7 EW |
99 | w->ww_nvis[i] = nvis; |
| 100 | } | |
| 101 | if ((w = w->ww_forw) == &wwhead) | |
| 102 | return; | |
| 1ceeb7e2 EW |
103 | if (hasglass) |
| 104 | goto again; | |
| 665bc9e7 EW |
105 | if (tt > t) |
| 106 | wwdelete1(w, t, tt, l, r); | |
| 107 | if (bb < b) | |
| 108 | wwdelete1(w, bb, b, l, r); | |
| 109 | if (ll > l) | |
| 1ceeb7e2 | 110 | wwdelete1(w, tt, bb, l, ll); |
| 665bc9e7 | 111 | if (rr < r) |
| 1ceeb7e2 | 112 | wwdelete1(w, tt, bb, rr, r); |
| 665bc9e7 | 113 | } |