1 /* $NetBSD: wwadd.c,v 1.7 2003/08/07 11:17:35 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Edward Wang at The University of California, Berkeley. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)wwadd.c 8.1 (Berkeley) 6/6/93"; 39 #else 40 __RCSID("$NetBSD: wwadd.c,v 1.7 2003/08/07 11:17:35 agc Exp $"); 41 #endif 42 #endif /* not lint */ 43 44 #include "ww.h" 45 46 /* 47 * Stick w1 behind w2. 48 */ 49 void 50 wwadd(struct ww *w1, struct ww *w2) 51 { 52 int i; 53 struct ww *w; 54 55 w1->ww_order = w2->ww_order + 1; 56 w1->ww_back = w2; 57 w1->ww_forw = w2->ww_forw; 58 w2->ww_forw->ww_back = w1; 59 w2->ww_forw = w1; 60 61 for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw) 62 w->ww_order++; 63 for (i = w1->ww_i.t; i < w1->ww_i.b; i++) { 64 int j; 65 unsigned char *smap = wwsmap[i]; 66 char *win = w1->ww_win[i]; 67 union ww_char *ns = wwns[i]; 68 union ww_char *buf = w1->ww_buf[i]; 69 int nvis = 0; 70 int nchanged = 0; 71 72 for (j = w1->ww_i.l; j < w1->ww_i.r; j++) { 73 w = wwindex[smap[j]]; 74 if (w1->ww_order > w->ww_order) 75 continue; 76 if (win[j] & WWM_GLS) 77 continue; 78 if (w != &wwnobody && w->ww_win[i][j] == 0) 79 w->ww_nvis[i]--; 80 smap[j] = w1->ww_index; 81 if (win[j] == 0) 82 nvis++; 83 ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT; 84 nchanged++; 85 } 86 if (nchanged > 0) 87 wwtouched[i] |= WWU_TOUCHED; 88 w1->ww_nvis[i] = nvis; 89 } 90 } 91