1 /* @(#)xx.c 8.1 (Berkeley) 6/6/93 */
2 /* $NetBSD: xx.c,v 1.7 2003/08/07 11:17:46 agc Exp $ */
5 * Copyright (c) 1989, 1993
6 * The Regents of the University of California. All rights reserved.
8 * This code is derived from software contributed to Berkeley by
9 * Edward Wang at The University of California, Berkeley.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49 xxbufsize = tt.tt_nrow * tt.tt_ncol * 2;
50 /* ccinit may choose to change xxbufsize */
51 if (tt.tt_ntoken > 0 && ccinit() < 0)
53 xxbuf = malloc((unsigned) xxbufsize * sizeof *xxbuf);
59 xxbufe = xxbuf + xxbufsize;
69 xxreset1(); /* might be a restart */
86 for (xp = xx_head; xp != NULL; xp = xq) {
90 xx_tail = xx_head = 0;
97 if (tt.tt_scroll_top != 0 || tt.tt_scroll_bot != tt.tt_nrow - 1)
98 /* tt.tt_setscroll is known to be defined */
99 (*tt.tt_setscroll)(0, tt.tt_nrow - 1);
101 (*tt.tt_setmodes)(0);
102 if (tt.tt_scroll_down)
103 (*tt.tt_scroll_down)(1);
104 (*tt.tt_move)(tt.tt_nrow - 1, 0);
105 if (tt.tt_ntoken > 0)
118 if ((xp = xx_freelist) == NULL)
119 /* XXX can't deal with failure */
120 xp = (struct xx *) malloc((unsigned) sizeof *xp);
122 xx_freelist = xp->link;
133 xxfree(struct xx *xp)
135 xp->link = xx_freelist;
140 xxmove(int row, int col)
142 struct xx *xp = xx_tail;
144 if (xp == NULL || xp->cmd != xc_move) {
153 xxscroll(int dir, int top, int bot)
155 struct xx *xp = xx_tail;
157 if (xp != NULL && xp->cmd == xc_scroll &&
158 xp->arg1 == top && xp->arg2 == bot &&
159 ((xp->arg0 < 0 && dir < 0) || (xp->arg0 > 0 && dir > 0))) {
171 xxinschar(int row, int col, int c, int m)
176 xp->cmd = xc_inschar;
184 xxinsspace(int row, int col)
186 struct xx *xp = xx_tail;
188 if (xp != NULL && xp->cmd == xc_insspace && xp->arg0 == row &&
189 col >= xp->arg1 && col <= xp->arg1 + xp->arg2) {
194 xp->cmd = xc_insspace;
201 xxdelchar(int row, int col)
203 struct xx *xp = xx_tail;
205 if (xp != NULL && xp->cmd == xc_delchar &&
206 xp->arg0 == row && xp->arg1 == col) {
211 xp->cmd = xc_delchar;
228 xxclreos(int row, int col)
230 struct xx *xp = xxalloc();
238 xxclreol(int row, int col)
240 struct xx *xp = xxalloc();
248 xxwrite(int row, int col, char *p, int n, int m)
252 if (xxbufp + n + 1 > xxbufe)
261 memmove(xxbufp, p, n);
263 *xxbufp++ = char_sep;