1 #ifndef lint 2 static char sccsid[] = "@(#)wwadd.c 3.9 04/24/85"; 3 #endif 4 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 11 #include "ww.h" 12 13 /* 14 * Stick w1 behind w2. 15 */ 16 wwadd(w1, w2) 17 register struct ww *w1; 18 struct ww *w2; 19 { 20 register i; 21 register struct ww *w; 22 23 w1->ww_order = w2->ww_order + 1; 24 w1->ww_back = w2; 25 w1->ww_forw = w2->ww_forw; 26 w2->ww_forw->ww_back = w1; 27 w2->ww_forw = w1; 28 29 for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw) 30 w->ww_order++; 31 for (i = w1->ww_i.t; i < w1->ww_i.b; i++) { 32 register j; 33 register char *smap = wwsmap[i]; 34 register char *win = w1->ww_win[i]; 35 union ww_char *ns = wwns[i]; 36 union ww_char *buf = w1->ww_buf[i]; 37 int nvis = 0; 38 int nchanged = 0; 39 40 for (j = w1->ww_i.l; j < w1->ww_i.r; j++) { 41 w = wwindex[smap[j]]; 42 if (w1->ww_order > w->ww_order) 43 continue; 44 if (win[j] & WWM_GLS) 45 continue; 46 if (w != &wwnobody && w->ww_win[i][j] == 0) 47 w->ww_nvis[i]--; 48 smap[j] = w1->ww_index; 49 if (win[j] == 0) 50 nvis++; 51 ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT; 52 nchanged++; 53 } 54 if (nchanged > 4) 55 wwtouched[i] |= WWU_MAJOR|WWU_TOUCHED; 56 else if (nchanged > 0) 57 wwtouched[i] |= WWU_TOUCHED; 58 w1->ww_nvis[i] = nvis; 59 } 60 } 61