NetBSD/games/hack/hack.tty.c

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/* $NetBSD: hack.tty.c,v 1.7 2000/07/10 10:19:25 itojun Exp $ */
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/*-
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
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*
* 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.
*/
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#include <sys/cdefs.h>
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#ifndef lint
#if 0
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static char sccsid[] = "@(#)hack.tty.c 8.1 (Berkeley) 5/31/93";
#else
__RCSID("$NetBSD: hack.tty.c,v 1.7 2000/07/10 10:19:25 itojun Exp $");
#endif
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#endif /* not lint */
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/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* hack.tty.c - version 1.0.3 */
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/*
* With thanks to the people who sent code for SYSV - hpscdi!jon,
* arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others.
*/
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#include <termios.h>
#include "hack.h"
#include "extern.h"
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/*
* 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
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#endif /* BSD */
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static char erase_char, kill_char;
static boolean settty_needed = FALSE;
struct termios inittyb, curttyb;
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/*
* 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
*/
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void
gettty()
{
extern speed_t ospeed;
if (tcgetattr(0, &inittyb) < 0)
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perror("Hack (gettty)");
curttyb = inittyb;
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ospeed = cfgetospeed(&inittyb);
erase_char = inittyb.c_cc[VERASE];
kill_char = inittyb.c_cc[VKILL];
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getioctls();
/* do not expand tabs - they might be needed inside a cm sequence */
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if (curttyb.c_oflag & OXTABS) {
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curttyb.c_oflag &= ~OXTABS;
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setctty();
}
settty_needed = TRUE;
}
/* reset terminal to original state */
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void
settty(s)
char *s;
{
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clear_screen();
end_screen();
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if (s)
printf("%s", s);
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(void) fflush(stdout);
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if (tcsetattr(0, TCSADRAIN, &inittyb) < 0)
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perror("Hack (settty)");
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flags.echo = (inittyb.c_lflag & ECHO) ? ON : OFF;
flags.cbreak = (inittyb.c_lflag & ICANON) ? OFF : ON;
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setioctls();
}
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void
setctty()
{
if (tcsetattr(0, TCSADRAIN, &curttyb) < 0)
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perror("Hack (setctty)");
}
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void
setftty()
{
int change = 0;
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flags.cbreak = ON;
flags.echo = OFF;
/* Should use (ECHO|CRMOD) here instead of ECHO */
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if (curttyb.c_lflag & ECHO) {
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curttyb.c_lflag &= ~ECHO;
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change++;
}
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if (curttyb.c_lflag & ICANON) {
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curttyb.c_lflag &= ~ICANON;
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/* be satisfied with one character; no timeout */
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curttyb.c_cc[VMIN] = 1;
curttyb.c_cc[VTIME] = 0;
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change++;
}
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if (change) {
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setctty();
}
start_screen();
}
/* fatal error */
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/* VARARGS1 */
void
#ifdef __STDC__
error(const char *fmt, ...)
#else
error(va_alist)
va_dcl
#endif
{
va_list ap;
#ifndef __STDC__
const char *fmt;
va_start(ap);
fmt = va_arg(ap, const char *);
#else
va_start(ap, fmt);
#endif
if (settty_needed)
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settty((char *) 0);
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vprintf(fmt, ap);
va_end(ap);
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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".
*/
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void
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getlin(bufp)
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char *bufp;
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{
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char *obufp = bufp;
int c;
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flags.toplin = 2; /* nonempty, no --More-- required */
for (;;) {
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(void) fflush(stdout);
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if ((c = getchar()) == EOF) {
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*bufp = 0;
return;
}
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if (c == '\033') {
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*obufp = c;
obufp[1] = 0;
return;
}
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if (c == erase_char || c == '\b') {
if (bufp != obufp) {
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bufp--;
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putstr("\b \b"); /* putsym converts \b */
} else
bell();
} else if (c == '\n') {
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*bufp = 0;
return;
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} else if (' ' <= c && c < '\177') {
/*
* avoid isprint() - some people don't have it ' ' is
* not always a printing char
*/
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*bufp = c;
bufp[1] = 0;
putstr(bufp);
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if (bufp - obufp < BUFSZ - 1 && bufp - obufp < COLNO)
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bufp++;
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} else if (c == kill_char || c == '\177') { /* Robert Viduya */
/* this test last - @ might be the kill_char */
while (bufp != obufp) {
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bufp--;
putstr("\b \b");
}
} else
bell();
}
}
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void
getret()
{
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cgetret("");
}
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void
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cgetret(s)
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char *s;
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{
putsym('\n');
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if (flags.standout)
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standoutbeg();
putstr("Hit ");
putstr(flags.cbreak ? "space" : "return");
putstr(" to continue: ");
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if (flags.standout)
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standoutend();
xwaitforspace(s);
}
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char morc; /* tell the outside world what char he used */
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void
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xwaitforspace(s)
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char *s; /* chars allowed besides space or return */
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{
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int c;
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morc = 0;
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while ((c = readchar()) != '\n') {
if (flags.cbreak) {
if (c == ' ')
break;
if (s && strchr(s, c)) {
morc = c;
break;
}
bell();
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}
}
}
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char *
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parse()
{
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static char inputline[COLNO];
int foo;
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flags.move = 1;
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if (!Invisible)
curs_on_u();
else
home();
while ((foo = readchar()) >= '0' && foo <= '9')
multi = 10 * multi + foo - '0';
if (multi) {
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multi--;
save_cm = inputline;
}
inputline[0] = foo;
inputline[1] = 0;
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if (foo == 'f' || foo == 'F') {
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inputline[1] = getchar();
#ifdef QUEST
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if (inputline[1] == foo)
inputline[2] = getchar();
else
#endif /* QUEST */
inputline[2] = 0;
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}
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if (foo == 'm' || foo == 'M') {
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inputline[1] = getchar();
inputline[2] = 0;
}
clrlin();
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return (inputline);
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}
char
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readchar()
{
int sym;
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(void) fflush(stdout);
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if ((sym = getchar()) == EOF)
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#ifdef NR_OF_EOFS
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{ /*
* 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.
*/
int cnt = NR_OF_EOFS;
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while (cnt--) {
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clearerr(stdin); /* omit if clearerr is
* undefined */
if ((sym = getchar()) != EOF)
goto noteof;
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}
end_of_input();
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noteof: ;
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}
#else
end_of_input();
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#endif /* NR_OF_EOFS */
if (flags.toplin == 1)
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flags.toplin = 2;
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return ((char) sym);
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}
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void
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end_of_input()
{
settty("End of input?\n");
clearlocks();
exit(0);
}