1 /* $NetBSD: xx.c,v 1.7 2003/08/07 11:17:46 agc Exp $ */
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Edward Wang at The University of California, Berkeley.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
35 #include <sys/cdefs.h>
38 static char sccsid[] = "@(#)xx.c 8.1 (Berkeley) 6/6/93";
40 __RCSID("$NetBSD: xx.c,v 1.7 2003/08/07 11:17:46 agc Exp $");
57 xxbufsize = tt.tt_nrow * tt.tt_ncol * 2;
58 /* ccinit may choose to change xxbufsize */
59 if (tt.tt_ntoken > 0 && ccinit() < 0)
61 xxbuf = malloc((unsigned) xxbufsize * sizeof *xxbuf);
67 xxbufe = xxbuf + xxbufsize;
77 xxreset1(); /* might be a restart */
94 for (xp = xx_head; xp != 0; xp = xq) {
98 xx_tail = xx_head = 0;
105 if (tt.tt_scroll_top != 0 || tt.tt_scroll_bot != tt.tt_nrow - 1)
106 /* tt.tt_setscroll is known to be defined */
107 (*tt.tt_setscroll)(0, tt.tt_nrow - 1);
109 (*tt.tt_setmodes)(0);
110 if (tt.tt_scroll_down)
111 (*tt.tt_scroll_down)(1);
112 (*tt.tt_move)(tt.tt_nrow - 1, 0);
113 if (tt.tt_ntoken > 0)
126 if ((xp = xx_freelist) == 0)
127 /* XXX can't deal with failure */
128 xp = (struct xx *) malloc((unsigned) sizeof *xp);
130 xx_freelist = xp->link;
141 xxfree(struct xx *xp)
143 xp->link = xx_freelist;
148 xxmove(int row, int col)
150 struct xx *xp = xx_tail;
152 if (xp == 0 || xp->cmd != xc_move) {
161 xxscroll(int dir, int top, int bot)
163 struct xx *xp = xx_tail;
165 if (xp != 0 && xp->cmd == xc_scroll &&
166 xp->arg1 == top && xp->arg2 == bot &&
167 ((xp->arg0 < 0 && dir < 0) || (xp->arg0 > 0 && dir > 0))) {
179 xxinschar(int row, int col, int c, int m)
184 xp->cmd = xc_inschar;
192 xxinsspace(int row, int col)
194 struct xx *xp = xx_tail;
196 if (xp != 0 && xp->cmd == xc_insspace && xp->arg0 == row &&
197 col >= xp->arg1 && col <= xp->arg1 + xp->arg2) {
202 xp->cmd = xc_insspace;
209 xxdelchar(int row, int col)
211 struct xx *xp = xx_tail;
213 if (xp != 0 && xp->cmd == xc_delchar &&
214 xp->arg0 == row && xp->arg1 == col) {
219 xp->cmd = xc_delchar;
236 xxclreos(int row, int col)
238 struct xx *xp = xxalloc();
246 xxclreol(int row, int col)
248 struct xx *xp = xxalloc();
256 xxwrite(int row, int col, char *p, int n, int m)
260 if (xxbufp + n + 1 > xxbufe)
269 memmove(xxbufp, p, n);
271 *xxbufp++ = char_sep;