4.4BSD/usr/src/games/hack/hack.tty.c
/*-
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 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
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)hack.tty.c 8.1 (Berkeley) 5/31/93";
#endif /* not lint */
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* hack.tty.c - version 1.0.3 */
/* With thanks to the people who sent code for SYSV - hpscdi!jon,
arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others. */
#include "hack.h"
#include <stdio.h>
/*
* The distinctions here are not BSD - rest but rather USG - rest, as
* BSD still has the old sgttyb structure, but SYSV has termio. Thus:
*/
#ifdef BSD
#define V7
#else
#define USG
#endif BSD
/*
* Some systems may have getchar() return EOF for various reasons, and
* we should not quit before seeing at least NR_OF_EOFS consecutive EOFs.
*/
#ifndef BSD
#define NR_OF_EOFS 20
#endif BSD
#ifdef USG
#include <termio.h>
#define termstruct termio
#define kill_sym c_cc[VKILL]
#define erase_sym c_cc[VERASE]
#define EXTABS TAB3
#define tabflgs c_oflag
#define echoflgs c_lflag
#define cbrkflgs c_lflag
#define CBRKMASK ICANON
#define CBRKON ! /* reverse condition */
#define OSPEED(x) ((x).c_cflag & CBAUD)
#define GTTY(x) (ioctl(0, TCGETA, x))
#define STTY(x) (ioctl(0, TCSETA, x)) /* TCSETAF? TCSETAW? */
#else /* V7 */
#include <sgtty.h>
#define termstruct sgttyb
#define kill_sym sg_kill
#define erase_sym sg_erase
#define EXTABS XTABS
#define tabflgs sg_flags
#define echoflgs sg_flags
#define cbrkflgs sg_flags
#define CBRKMASK CBREAK
#define CBRKON /* empty */
#define OSPEED(x) (x).sg_ospeed
#define GTTY(x) (gtty(0, x))
#define STTY(x) (stty(0, x))
#endif USG
extern short ospeed;
static char erase_char, kill_char;
static boolean settty_needed = FALSE;
struct termstruct inittyb, curttyb;
/*
* Get initial state of terminal, set ospeed (for termcap routines)
* and switch off tab expansion if necessary.
* Called by startup() in termcap.c and after returning from ! or ^Z
*/
gettty(){
if(GTTY(&inittyb) < 0)
perror("Hack (gettty)");
curttyb = inittyb;
ospeed = OSPEED(inittyb);
erase_char = inittyb.erase_sym;
kill_char = inittyb.kill_sym;
getioctls();
/* do not expand tabs - they might be needed inside a cm sequence */
if(curttyb.tabflgs & EXTABS) {
curttyb.tabflgs &= ~EXTABS;
setctty();
}
settty_needed = TRUE;
}
/* reset terminal to original state */
settty(s) char *s; {
clear_screen();
end_screen();
if(s) printf(s);
(void) fflush(stdout);
if(STTY(&inittyb) < 0)
perror("Hack (settty)");
flags.echo = (inittyb.echoflgs & ECHO) ? ON : OFF;
flags.cbreak = (CBRKON(inittyb.cbrkflgs & CBRKMASK)) ? ON : OFF;
setioctls();
}
setctty(){
if(STTY(&curttyb) < 0)
perror("Hack (setctty)");
}
setftty(){
register int ef = 0; /* desired value of flags & ECHO */
register int cf = CBRKON(CBRKMASK); /* desired value of flags & CBREAK */
register int change = 0;
flags.cbreak = ON;
flags.echo = OFF;
/* Should use (ECHO|CRMOD) here instead of ECHO */
if((curttyb.echoflgs & ECHO) != ef){
curttyb.echoflgs &= ~ECHO;
/* curttyb.echoflgs |= ef; */
change++;
}
if((curttyb.cbrkflgs & CBRKMASK) != cf){
curttyb.cbrkflgs &= ~CBRKMASK;
curttyb.cbrkflgs |= cf;
#ifdef USG
/* be satisfied with one character; no timeout */
curttyb.c_cc[VMIN] = 1; /* was VEOF */
curttyb.c_cc[VTIME] = 0; /* was VEOL */
#endif USG
change++;
}
if(change){
setctty();
}
start_screen();
}
/* fatal error */
/*VARARGS1*/
error(s,x,y) char *s; {
if(settty_needed)
settty((char *) 0);
printf(s,x,y);
putchar('\n');
exit(1);
}
/*
* Read a line closed with '\n' into the array char bufp[BUFSZ].
* (The '\n' is not stored. The string is closed with a '\0'.)
* Reading can be interrupted by an escape ('\033') - now the
* resulting string is "\033".
*/
getlin(bufp)
register char *bufp;
{
register char *obufp = bufp;
register int c;
flags.toplin = 2; /* nonempty, no --More-- required */
for(;;) {
(void) fflush(stdout);
if((c = getchar()) == EOF) {
*bufp = 0;
return;
}
if(c == '\033') {
*obufp = c;
obufp[1] = 0;
return;
}
if(c == erase_char || c == '\b') {
if(bufp != obufp) {
bufp--;
putstr("\b \b"); /* putsym converts \b */
} else bell();
} else if(c == '\n') {
*bufp = 0;
return;
} else if(' ' <= c && c < '\177') {
/* avoid isprint() - some people don't have it
' ' is not always a printing char */
*bufp = c;
bufp[1] = 0;
putstr(bufp);
if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO)
bufp++;
} else if(c == kill_char || c == '\177') { /* Robert Viduya */
/* this test last - @ might be the kill_char */
while(bufp != obufp) {
bufp--;
putstr("\b \b");
}
} else
bell();
}
}
getret() {
cgetret("");
}
cgetret(s)
register char *s;
{
putsym('\n');
if(flags.standout)
standoutbeg();
putstr("Hit ");
putstr(flags.cbreak ? "space" : "return");
putstr(" to continue: ");
if(flags.standout)
standoutend();
xwaitforspace(s);
}
char morc; /* tell the outside world what char he used */
xwaitforspace(s)
register char *s; /* chars allowed besides space or return */
{
register int c;
morc = 0;
while((c = readchar()) != '\n') {
if(flags.cbreak) {
if(c == ' ') break;
if(s && index(s,c)) {
morc = c;
break;
}
bell();
}
}
}
char *
parse()
{
static char inputline[COLNO];
register foo;
flags.move = 1;
if(!Invisible) curs_on_u(); else home();
while((foo = readchar()) >= '0' && foo <= '9')
multi = 10*multi+foo-'0';
if(multi) {
multi--;
save_cm = inputline;
}
inputline[0] = foo;
inputline[1] = 0;
if(foo == 'f' || foo == 'F'){
inputline[1] = getchar();
#ifdef QUEST
if(inputline[1] == foo) inputline[2] = getchar(); else
#endif QUEST
inputline[2] = 0;
}
if(foo == 'm' || foo == 'M'){
inputline[1] = getchar();
inputline[2] = 0;
}
clrlin();
return(inputline);
}
char
readchar() {
register int sym;
(void) fflush(stdout);
if((sym = getchar()) == EOF)
#ifdef NR_OF_EOFS
{ /*
* Some SYSV systems seem to return EOFs for various reasons
* (?like when one hits break or for interrupted systemcalls?),
* and we must see several before we quit.
*/
register int cnt = NR_OF_EOFS;
while (cnt--) {
clearerr(stdin); /* omit if clearerr is undefined */
if((sym = getchar()) != EOF) goto noteof;
}
end_of_input();
noteof: ;
}
#else
end_of_input();
#endif NR_OF_EOFS
if(flags.toplin == 1)
flags.toplin = 2;
return((char) sym);
}
end_of_input()
{
settty("End of input?\n");
clearlocks();
exit(0);
}