* Copyright (c) 1989 Regents of the University of California.
* 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, with or without
* modification, are permitted provided that the following conditions
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
static char sccsid
[] = "@(#)xx.c 3.6 (Berkeley) 6/6/90";
xxbufsize
= tt
.tt_nrow
* tt
.tt_ncol
* 2;
/* ccinit may choose to change xxbufsize */
if (tt
.tt_ntoken
> 0 && ccinit() < 0)
xxbuf
= malloc((unsigned) xxbufsize
* sizeof *xxbuf
);
xxbufe
= xxbuf
+ xxbufsize
;
xxreset(); /* might be a restart */
if (tt
.tt_scroll_top
!= 0 || tt
.tt_scroll_bot
!= tt
.tt_nrow
- 1)
/* tt.tt_setscroll is known to be defined */
(*tt
.tt_setscroll
)(0, tt
.tt_nrow
- 1);
(*tt
.tt_move
)(tt
.tt_nrow
- 1, 0);
if ((xp
= xx_freelist
) == 0)
/* XXX can't deal with failure */
xp
= (struct xx
*) malloc((unsigned) sizeof *xp
);
register struct xx
*xp
= xx_tail
;
if (xp
== 0 || xp
->cmd
!= xc_move
) {
register struct xx
*xp
= xx_tail
;
if (xp
!= 0 && xp
->cmd
== xc_scroll
&&
xp
->arg1
== top
&& xp
->arg2
== bot
&&
(xp
->arg0
< 0 && dir
< 0 || xp
->arg0
> 0 && dir
> 0)) {
xxinschar(row
, col
, c
, m
)
register struct xx
*xp
= xx_tail
;
if (xp
!= 0 && xp
->cmd
== xc_insspace
&& xp
->arg0
== row
&&
col
>= xp
->arg1
&& col
<= xp
->arg1
+ xp
->arg2
) {
register struct xx
*xp
= xx_tail
;
if (xp
!= 0 && xp
->cmd
== xc_delchar
&&
xp
->arg0
== row
&& xp
->arg1
== col
) {
register struct xx
*xp
= xxalloc();
register struct xx
*xp
= xxalloc();
xxwrite(row
, col
, p
, n
, m
)
if (xxbufp
+ n
+ 1 > xxbufe
)
register struct xx
*xp
, *xq
;
for (xp
= xx_head
; xp
!= 0; xp
= xq
) {