186d7f5d3SJohn Marino /* @(#)wwadd.c 8.1 (Berkeley) 6/6/93 */
286d7f5d3SJohn Marino /* $NetBSD: wwadd.c,v 1.7 2003/08/07 11:17:35 agc Exp $ */
386d7f5d3SJohn Marino
486d7f5d3SJohn Marino /*
586d7f5d3SJohn Marino * Copyright (c) 1983, 1993
686d7f5d3SJohn Marino * The Regents of the University of California. All rights reserved.
786d7f5d3SJohn Marino *
886d7f5d3SJohn Marino * This code is derived from software contributed to Berkeley by
986d7f5d3SJohn Marino * Edward Wang at The University of California, Berkeley.
1086d7f5d3SJohn Marino *
1186d7f5d3SJohn Marino * Redistribution and use in source and binary forms, with or without
1286d7f5d3SJohn Marino * modification, are permitted provided that the following conditions
1386d7f5d3SJohn Marino * are met:
1486d7f5d3SJohn Marino * 1. Redistributions of source code must retain the above copyright
1586d7f5d3SJohn Marino * notice, this list of conditions and the following disclaimer.
1686d7f5d3SJohn Marino * 2. Redistributions in binary form must reproduce the above copyright
1786d7f5d3SJohn Marino * notice, this list of conditions and the following disclaimer in the
1886d7f5d3SJohn Marino * documentation and/or other materials provided with the distribution.
1986d7f5d3SJohn Marino * 3. Neither the name of the University nor the names of its contributors
2086d7f5d3SJohn Marino * may be used to endorse or promote products derived from this software
2186d7f5d3SJohn Marino * without specific prior written permission.
2286d7f5d3SJohn Marino *
2386d7f5d3SJohn Marino * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2486d7f5d3SJohn Marino * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2586d7f5d3SJohn Marino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2686d7f5d3SJohn Marino * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2786d7f5d3SJohn Marino * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2886d7f5d3SJohn Marino * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2986d7f5d3SJohn Marino * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3086d7f5d3SJohn Marino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
3186d7f5d3SJohn Marino * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
3286d7f5d3SJohn Marino * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3386d7f5d3SJohn Marino * SUCH DAMAGE.
3486d7f5d3SJohn Marino */
3586d7f5d3SJohn Marino
3686d7f5d3SJohn Marino #include "ww.h"
3786d7f5d3SJohn Marino
3886d7f5d3SJohn Marino /*
3986d7f5d3SJohn Marino * Stick w1 behind w2.
4086d7f5d3SJohn Marino */
4186d7f5d3SJohn Marino void
wwadd(struct ww * w1,struct ww * w2)4286d7f5d3SJohn Marino wwadd(struct ww *w1, struct ww *w2)
4386d7f5d3SJohn Marino {
4486d7f5d3SJohn Marino int i;
4586d7f5d3SJohn Marino struct ww *w;
4686d7f5d3SJohn Marino
4786d7f5d3SJohn Marino w1->ww_order = w2->ww_order + 1;
4886d7f5d3SJohn Marino w1->ww_back = w2;
4986d7f5d3SJohn Marino w1->ww_forw = w2->ww_forw;
5086d7f5d3SJohn Marino w2->ww_forw->ww_back = w1;
5186d7f5d3SJohn Marino w2->ww_forw = w1;
5286d7f5d3SJohn Marino
5386d7f5d3SJohn Marino for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw)
5486d7f5d3SJohn Marino w->ww_order++;
5586d7f5d3SJohn Marino for (i = w1->ww_i.t; i < w1->ww_i.b; i++) {
5686d7f5d3SJohn Marino int j;
5786d7f5d3SJohn Marino unsigned char *smap = wwsmap[i];
5886d7f5d3SJohn Marino char *win = w1->ww_win[i];
5986d7f5d3SJohn Marino union ww_char *ns = wwns[i];
6086d7f5d3SJohn Marino union ww_char *buf = w1->ww_buf[i];
6186d7f5d3SJohn Marino int nvis = 0;
6286d7f5d3SJohn Marino int nchanged = 0;
6386d7f5d3SJohn Marino
6486d7f5d3SJohn Marino for (j = w1->ww_i.l; j < w1->ww_i.r; j++) {
6586d7f5d3SJohn Marino w = wwindex[smap[j]];
6686d7f5d3SJohn Marino if (w1->ww_order > w->ww_order)
6786d7f5d3SJohn Marino continue;
6886d7f5d3SJohn Marino if (win[j] & WWM_GLS)
6986d7f5d3SJohn Marino continue;
7086d7f5d3SJohn Marino if (w != &wwnobody && w->ww_win[i][j] == 0)
7186d7f5d3SJohn Marino w->ww_nvis[i]--;
7286d7f5d3SJohn Marino smap[j] = w1->ww_index;
7386d7f5d3SJohn Marino if (win[j] == 0)
7486d7f5d3SJohn Marino nvis++;
7586d7f5d3SJohn Marino ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
7686d7f5d3SJohn Marino nchanged++;
7786d7f5d3SJohn Marino }
7886d7f5d3SJohn Marino if (nchanged > 0)
7986d7f5d3SJohn Marino wwtouched[i] |= WWU_TOUCHED;
8086d7f5d3SJohn Marino w1->ww_nvis[i] = nvis;
8186d7f5d3SJohn Marino }
8286d7f5d3SJohn Marino }
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