| 1 | /* |
| 2 | * Copyright (c) 1983 Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This code is derived from software contributed to Berkeley by |
| 6 | * Edward Wang at The University of California, Berkeley. |
| 7 | * |
| 8 | * %sccs.include.redist.c% |
| 9 | */ |
| 10 | |
| 11 | #ifndef lint |
| 12 | static char sccsid[] = "@(#)wwadd.c 3.14 (Berkeley) %G%"; |
| 13 | #endif /* not lint */ |
| 14 | |
| 15 | #include "ww.h" |
| 16 | |
| 17 | /* |
| 18 | * Stick w1 behind w2. |
| 19 | */ |
| 20 | wwadd(w1, w2) |
| 21 | register struct ww *w1; |
| 22 | struct ww *w2; |
| 23 | { |
| 24 | register i; |
| 25 | register struct ww *w; |
| 26 | |
| 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; |
| 32 | |
| 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++) { |
| 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]; |
| 41 | int nvis = 0; |
| 42 | int nchanged = 0; |
| 43 | |
| 44 | for (j = w1->ww_i.l; j < w1->ww_i.r; j++) { |
| 45 | w = wwindex[smap[j]]; |
| 46 | if (w1->ww_order > w->ww_order) |
| 47 | continue; |
| 48 | if (win[j] & WWM_GLS) |
| 49 | continue; |
| 50 | if (w != &wwnobody && w->ww_win[i][j] == 0) |
| 51 | w->ww_nvis[i]--; |
| 52 | smap[j] = w1->ww_index; |
| 53 | if (win[j] == 0) |
| 54 | nvis++; |
| 55 | ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT; |
| 56 | nchanged++; |
| 57 | } |
| 58 | if (nchanged > 0) |
| 59 | wwtouched[i] |= WWU_TOUCHED; |
| 60 | w1->ww_nvis[i] = nvis; |
| 61 | } |
| 62 | } |