/* * Copyright (c) 1983 Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Edward Wang at The University of California, Berkeley. * * Redistribution and use in source and binary forms are permitted provided * that: (1) source distributions retain this entire copyright notice and * comment, and (2) distributions including binaries display the following * acknowledgement: ``This product includes software developed by the * University of California, Berkeley and its contributors'' in the * documentation or other materials provided with the distribution and in * all advertising materials mentioning features or use of this software. * Neither the name of the University nor the names of its contributors may * be used to endorse or promote products derived from this software without * specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ #ifndef lint static char sccsid[] = "@(#)wwadd.c 3.14 (Berkeley) 6/6/90"; #endif /* not lint */ #include "ww.h" /* * Stick w1 behind w2. */ wwadd(w1, w2) register struct ww *w1; struct ww *w2; { register i; register struct ww *w; w1->ww_order = w2->ww_order + 1; w1->ww_back = w2; w1->ww_forw = w2->ww_forw; w2->ww_forw->ww_back = w1; w2->ww_forw = w1; for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw) w->ww_order++; for (i = w1->ww_i.t; i < w1->ww_i.b; i++) { register j; register char *smap = wwsmap[i]; register char *win = w1->ww_win[i]; union ww_char *ns = wwns[i]; union ww_char *buf = w1->ww_buf[i]; int nvis = 0; int nchanged = 0; for (j = w1->ww_i.l; j < w1->ww_i.r; j++) { w = wwindex[smap[j]]; if (w1->ww_order > w->ww_order) continue; if (win[j] & WWM_GLS) continue; if (w != &wwnobody && w->ww_win[i][j] == 0) w->ww_nvis[i]--; smap[j] = w1->ww_index; if (win[j] == 0) nvis++; ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT; nchanged++; } if (nchanged > 0) wwtouched[i] |= WWU_TOUCHED; w1->ww_nvis[i] = nvis; } }