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termio.c
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C/C++ Source or Header
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1992-12-14
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/*
* The functions in this file negotiate with the operating system for
* characters, and write characters in a barely buffered fashion on the display.
* All operating systems.
*
* $Log: termio.c,v $
* Revision 1.51 1992/12/05 13:58:20 foxharp
* added missing TTclose to ttclean, for Tom Dickey on his apollo -- I'm not
* convinced this seems right, but I'll try it for now.
*
* Revision 1.50 1992/12/04 09:18:04 foxharp
* added another flush
*
* Revision 1.49 1992/08/20 23:40:48 foxharp
* typo fixes -- thanks, eric
*
* Revision 1.48 1992/08/19 23:02:47 foxharp
* ignore errors in ttunclean
*
* Revision 1.47 1992/08/04 20:14:58 foxharp
* invert sense of ifdef -- it seems filio.h isn't as common as I thought
*
* Revision 1.46 1992/07/24 07:49:27 foxharp
* aix has no filio.h
*
* Revision 1.45 1992/07/20 22:50:40 foxharp
* use putchar/getchar instead of fputc/fgetc
*
* Revision 1.44 1992/07/17 19:19:47 foxharp
* took out commented cruft
*
* Revision 1.43 1992/07/01 17:04:33 foxharp
* always use && and || in #if statements, and
* MSC now uses getch() to get characters, and
* use TTputc() to put out cr-nl pairs instead of ttputc()
*
* Revision 1.42 1992/06/26 22:19:32 foxharp
* improved (i hope) the FIONREAD ifdefs. needs testing.
*
* Revision 1.41 1992/06/25 23:00:50 foxharp
* changes for dos/ibmpc
*
* Revision 1.40 1992/06/22 08:35:13 foxharp
* AIX has the fcntl bug, but isn't BERK. also added ifdef VSWTCH protection
*
* Revision 1.39 1992/06/14 11:33:54 foxharp
* fcntl hack for AIX
*
* Revision 1.38 1992/06/11 09:44:10 foxharp
* try to avoid the fcntl() bug with better ifdefing
*
* Revision 1.37 1992/05/27 19:16:22 foxharp
* took out extra call to setbuffer()
*
* Revision 1.36 1992/05/25 21:34:29 foxharp
* moved extern func declarations to header
*
* Revision 1.34 1992/05/20 18:55:42 foxharp
* don't use fcntl on a/ux, either
*
* Revision 1.33 1992/05/16 12:00:31 pgf
* prototypes/ansi/void-int stuff/microsoftC
*
* Revision 1.32 1992/05/13 09:13:41 pgf
* make X11 do even less in ttclean/unclean routines
*
* Revision 1.31 1992/04/14 08:40:11 pgf
* added osf hack, to use sgtty instead of posix, and fixed sun hack, to use
* fionread instead of fcntl, to prevent output flush during typeahead check
*
* Revision 1.30 1992/04/10 18:50:22 pgf
* always include termios.h, not sys/termios.h, and
* don't call setbuffer on odt or isc
*
* Revision 1.29 1992/03/26 09:16:59 pgf
* ifdef cleanup
*
* Revision 1.28 1992/03/25 19:13:17 pgf
* BSD portability changes
*
* Revision 1.27 1992/03/20 08:59:28 pgf
* kbd_is_polled was out of sync after ttclean/unclean
*
* Revision 1.26 1992/03/19 23:27:20 pgf
* SIGT for signals, linux port
*
* Revision 1.25 1992/03/19 23:09:46 pgf
* TIOCSETP is now TIOCSETN, in all cases
*
* Revision 1.24 1992/03/07 10:25:58 pgf
* AIX support (where is termios.h supposed to be?)
*
* Revision 1.23 1992/01/22 20:28:28 pgf
* call TTclose in ttunclean, to support tcapclose(). i hope this is safe
* for other screen types
*
* Revision 1.22 1992/01/10 08:11:41 pgf
* fixed signal handling, for sysV style handling. also
* fixed 2nd arg to tcsetattr()
*
* Revision 1.21 1992/01/02 22:42:40 pgf
* oops -- dropped the termio restoral in ttclean
*
* Revision 1.20 1992/01/01 16:30:14 pgf
* more ifdef'ing on V_SUSP (for pyramid?), and
* now get tty chars under X11, though we still don't set new modes
*
* Revision 1.19 1991/12/20 08:12:00 pgf
* check the error return from tcsetattr()
*
* Revision 1.18 1991/12/04 09:22:19 pgf
* a little more massaging of ifdefs
*
* Revision 1.17 1991/11/27 10:13:10 pgf
* code split/re-arranged, cleaner posix support
*
* Revision 1.16 1991/11/16 18:35:55 pgf
* changed the ifdefing so termio or sgtty can be used independently of
* other UNIX choices
*
* Revision 1.15 1991/11/14 08:58:17 pgf
* switch to TCSETAW from TSSETAF in ttclean and unclean -- don't want to
* flush input needlessly
*
* Revision 1.14 1991/11/13 20:09:27 pgf
* X11 changes, from dave lemke
*
* Revision 1.13 1991/11/07 02:00:32 pgf
* lint cleanup
*
* Revision 1.12 1991/11/01 14:38:00 pgf
* saber cleanup
*
* Revision 1.11 1991/10/15 12:18:39 pgf
* fetch more termio chars at startup, like wkillc, suspc, etc.
*
* Revision 1.10 1991/08/12 15:05:43 pgf
* rearranged read-ahead in one of the tgetc options
*
* Revision 1.9 1991/08/07 12:35:07 pgf
* added RCS log messages
*
* revision 1.8
* date: 1991/07/19 17:17:49;
* change backspace action to back_char_to_bol()
*
* revision 1.7
* date: 1991/06/28 10:54:00;
* change a config ifdef
*
* revision 1.6
* date: 1991/04/22 09:06:57;
* POSIX/ULTRIX changes
*
* revision 1.5
* date: 1991/02/14 15:50:41;
* fixed size problem on olstate/nlstate
*
* revision 1.4
* date: 1990/12/06 18:54:48;
* tried to get ttgetc to return -1 on interrupt -- doesn't work
*
* revision 1.3
* date: 1990/10/12 19:32:11;
* do SETAF, not SETA in ttunclean
*
* revision 1.2
* date: 1990/10/03 16:01:04;
* make backspace work for everyone
*
* revision 1.1
* date: 1990/09/21 10:26:10;
* initial vile RCS revision
*/
#include <stdio.h>
#include "estruct.h"
#include "edef.h"
#if UNIX
#include <errno.h>
extern int errno;
/* there are three copies of the tt...() routines here -- one each for
POSIX termios, traditional termio, and sgtty. If you have a
choice, I recommend them in that order. */
/* ttopen() and ttclose() are responsible for putting the terminal in raw
mode, setting up terminal signals, etc.
ttclean() prepares the terminal for shell escapes, and ttunclean() gets
us back into vile's mode
*/
#include <signal.h>
/* I suppose this config stuff should move to estruct.h */
#if OSF1 /* don't know why termios doesn't yet work in osf 1.1 */
# undef POSIX
# undef BERK
# define BERK 1
#endif
#if POSIX
# define USE_POSIX_TERMIOS 1
# define USE_FCNTL 1
#else
# if USG
# define USE_TERMIO 1
# define USE_FCNTL 1
# else
# if BERK || V7
# define USE_SGTTY 1
# define USE_FIONREAD 1
# else
huh?
# endif
# endif
#endif
#if (BERK || AIX || AUX2) && !defined(FIONREAD)
/* try harder to get it */
# if SUNOS
# include "filio.h"
# else
# include "ioctl.h"
# endif
#endif
#if X11 /* don't use either one */
# undef USE_FCNTL
# undef USE_FIONREAD
#else
# if defined(FIONREAD)
/* there seems to be a bug in someone's implementation of fcntl -- it
* causes output to be flushed if you change to ndelay input while output
* is pending. for these systems, we use FIONREAD instead, if possible.
* In fact, if try and use FIONREAD in any case if present. If you have
* the problem with fcntl, you'll notice that the screen doesn't always
* refresh correctly, as if the fcntl is interfering with the output drain
*/
# undef USE_FCNTL
# define USE_FIONREAD 1
# endif
#endif
#if USE_FCNTL
/* this is used to determine whether input is pending from the user */
#include <fcntl.h>
int kbd_flags; /* saved keyboard fcntl flags */
int kbd_is_polled; /* in O_NDELAY mode? */
int kbd_char_present; /* there is a char in kbd_char */
char kbd_char; /* the char we've already read */
#endif
#define SMALL_STDOUT 1
#if defined(SMALL_STDOUT) && (defined (USE_FCNTL) || defined(USE_FIONREAD))
#define TBUFSIZ 128 /* Provide a smaller terminal output buffer so that
the type-ahead detection works better (more often).
That is, we overlap screen writing with more keyboard polling */
#else
#define TBUFSIZ 1024 /* reduces the number of writes */
#endif
extern CMDFUNC f_backchar;
extern CMDFUNC f_backchar_to_bol;
#if USE_POSIX_TERMIOS
#include <termios.h>
struct termios otermios, ntermios;
char tobuf[TBUFSIZ]; /* terminal output buffer */
void
ttopen()
{
int s;
s = tcgetattr(0, &otermios);
if (s < 0) {
perror("ttopen tcgetattr");
exit(1);
}
#if ODT || ISC
setvbuf(stdout, tobuf, _IOLBF, TBUFSIZ);
#else
setbuffer(stdout, tobuf, TBUFSIZ);
#endif
suspc = otermios.c_cc[VSUSP];
intrc = otermios.c_cc[VINTR];
killc = otermios.c_cc[VKILL];
startc = otermios.c_cc[VSTART];
stopc = otermios.c_cc[VSTOP];
backspc = otermios.c_cc[VERASE];
#ifdef VWERASE /* Sun has it. any others? */
wkillc = otermios.c_cc[VWERASE];
#else
wkillc = tocntrl('W');
#endif
{ /* this could probably be done more POSIX'ish? */
signal(SIGTSTP,SIG_DFL); /* set signals so that we can */
signal(SIGCONT,rtfrmshell); /* suspend & restart */
signal(SIGTTOU,SIG_IGN); /* ignore output prevention */
}
#if USE_FCNTL
kbd_flags = fcntl( 0, F_GETFL, 0 );
kbd_is_polled = FALSE;
#endif
#if ! X11
ntermios = otermios;
/* setup new settings, preserve flow control, and allow BREAK */
ntermios.c_iflag = BRKINT|(otermios.c_iflag & IXON|IXANY|IXOFF);
ntermios.c_oflag = 0;
ntermios.c_lflag = ISIG;
ntermios.c_cc[VMIN] = 1;
ntermios.c_cc[VTIME] = 0;
#ifdef VSWTCH
ntermios.c_cc[VSWTCH] = -1;
#endif
ntermios.c_cc[VSUSP] = -1;
ntermios.c_cc[VSTART] = -1;
ntermios.c_cc[VSTOP] = -1;
#endif
ttmiscinit();
ttunclean();
}
void
ttclose()
{
ttclean(TRUE);
}
void
ttclean(f)
int f;
{
#if !X11
if (f) {
movecursor(term.t_nrow, ttcol); /* don't care about column */
TTputc('\n');
TTputc('\r');
}
fflush(stdout);
#if ! LINUX
tcdrain(1);
#endif
tcsetattr(0, TCSADRAIN, &otermios);
TTclose();
TTflush();
#if USE_FCNTL
fcntl(0, F_SETFL, kbd_flags);
kbd_is_polled = FALSE;
#endif
#endif
}
void
ttunclean()
{
#if ! X11
#if ! LINUX
tcdrain(1);
#endif
tcsetattr(0, TCSADRAIN, &ntermios);
#endif
}
#endif /* USE_POSIX_TERMIOS */
#if USE_TERMIO
#include <termio.h>
/* original terminal characteristics and characteristics to use inside */
struct termio otermio, ntermio;
#ifdef AVAILABLE /* setbuffer() isn't on most termio systems */
char tobuf[TBUFSIZ]; /* terminal output buffer */
#endif
void
ttopen()
{
ioctl(0, TCGETA, &otermio); /* save old settings */
#ifdef AVAILABLE
setbuffer(stdout, tobuf, TBUFSIZ);
#endif
intrc = otermio.c_cc[VINTR];
killc = otermio.c_cc[VKILL];
startc = tocntrl('Q');
stopc = tocntrl('S');
backspc = otermio.c_cc[VERASE];
wkillc = tocntrl('W');
#if USE_FCNTL
kbd_flags = fcntl( 0, F_GETFL, 0 );
kbd_is_polled = FALSE;
#endif
#if SIGTSTP
/* be careful here -- VSUSP is sometimes out of the range of the c_cc array */
# ifdef VSUSP /* ODT (all POSIX?) uses this... */
ntermio.c_cc[VSUSP] = -1;
ntermio.c_cc[VSTART] = -1;
ntermio.c_cc[VSTOP] = -1;
suspc = otermio.c_cc[VSUSP];
# else /* use V_SUSP */
# ifdef V_SUSP
ntermio.c_cc[V_SUSP] = -1;
suspc = otermio.c_cc[V_SUSP];
# else
suspc = -1;
# endif
# ifdef V_DSUSP
ntermio.c_cc[V_DSUSP] = -1;
# endif
# endif
{
signal(SIGTSTP,SIG_DFL); /* set signals so that we can */
signal(SIGCONT,rtfrmshell); /* suspend & restart */
signal(SIGTTOU,SIG_IGN); /* ignore output prevention */
}
#else /* no SIGTSTP */
suspc = tocntrl('Z');
#endif
#if ! X11
ntermio = otermio;
/* setup new settings, preserve flow control, and allow BREAK */
ntermio.c_iflag = BRKINT|(otermio.c_iflag & IXON|IXANY|IXOFF);
ntermio.c_oflag = 0;
ntermio.c_lflag = ISIG;
ntermio.c_cc[VMIN] = 1;
ntermio.c_cc[VTIME] = 0;
#ifdef VSWTCH
ntermio.c_cc[VSWTCH] = -1;
#endif
#endif
ttmiscinit();
ttunclean();
}
void
ttclose()
{
ttclean(TRUE);
}
void
ttclean(f)
int f;
{
#if X11
TTflush();
TTclose();
#else
if (f) {
movecursor(term.t_nrow, ttcol); /* don't care about column */
TTputc('\n');
TTputc('\r');
}
TTflush();
TTclose();
ioctl(0, TCSETAF, &otermio);
#if USE_FCNTL
fcntl(0, F_SETFL, kbd_flags);
kbd_is_polled = FALSE;
#endif
#endif /* X11 */
}
void
ttunclean()
{
#if ! X11
ioctl(0, TCSETAW, &ntermio);
#endif
}
#endif /* USE_TERMIO */
#if USE_SGTTY
#if USE_FIONREAD
char tobuf[TBUFSIZ]; /* terminal output buffer */
#endif
#undef CTRL
#include <sgtty.h> /* for stty/gtty functions */
struct sgttyb ostate; /* saved tty state */
struct sgttyb nstate; /* values for editor mode */
struct sgttyb rnstate; /* values for raw editor mode */
int olstate; /* Saved local mode values */
int nlstate; /* new local mode values */
struct ltchars oltchars; /* Saved terminal special character set */
struct ltchars nltchars = { -1, -1, -1, -1, -1, -1 }; /* a lot of nothing */
struct tchars otchars; /* Saved terminal special character set */
struct tchars ntchars; /* = { -1, -1, -1, -1, -1, -1 }; */
void
ttopen()
{
ioctl(0,TIOCGETP,&ostate); /* save old state */
killc = ostate.sg_kill;
backspc = ostate.sg_erase;
#if ! X11
nstate = ostate;
nstate.sg_flags |= CBREAK;
nstate.sg_flags &= ~(ECHO|CRMOD); /* no echo for now... */
ioctl(0,TIOCSETN,&nstate); /* set new state */
#endif
rnstate = nstate;
rnstate.sg_flags &= ~CBREAK;
rnstate.sg_flags |= RAW;
ioctl(0, TIOCGETC, &otchars); /* Save old characters */
intrc = otchars.t_intrc;
startc = otchars.t_startc;
stopc = otchars.t_stopc;
#if ! X11
ntchars = otchars;
ntchars.t_brkc = -1;
ntchars.t_eofc = -1;
ioctl(0, TIOCSETC, &ntchars); /* Place new character into K */
#endif
ioctl(0, TIOCGLTC, &oltchars); /* Save old characters */
wkillc = oltchars.t_werasc;
suspc = oltchars.t_suspc;
#if ! X11
ioctl(0, TIOCSLTC, &nltchars); /* Place new character into K */
#endif
#ifdef TIOCLGET
ioctl(0, TIOCLGET, &olstate);
#if ! X11
nlstate = olstate;
nlstate |= LLITOUT;
ioctl(0, TIOCLSET, &nlstate);
#endif
#endif
#if USE_FIONREAD
setbuffer(stdout, tobuf, TBUFSIZ);
#endif
#if ! X11
{
signal(SIGTSTP,SIG_DFL); /* set signals so that we can */
signal(SIGCONT,rtfrmshell); /* suspend & restart */
signal(SIGTTOU,SIG_IGN); /* ignore output prevention */
}
#endif
ttmiscinit();
}
void
ttclose()
{
ttclean(TRUE);
}
void
ttclean(f)
int f;
{
#if ! X11
if (f) {
movecursor(term.t_nrow, ttcol); /* don't care about column */
TTputc('\n');
TTputc('\r');
}
TTflush();
TTclose();
ioctl(0, TIOCSETN, &ostate);
ioctl(0, TIOCSETC, &otchars);
ioctl(0, TIOCSLTC, &oltchars);
#ifdef TIOCLSET
ioctl(0, TIOCLSET, &olstate);
#endif
#endif
}
void
ttunclean()
{
#if ! X11
ioctl(0, TIOCSETN, &nstate);
ioctl(0, TIOCSETC, &ntchars);
ioctl(0, TIOCSLTC, &nltchars);
#ifdef TIOCLSET
ioctl(0, TIOCLSET, &nlstate);
#endif
#endif
}
#endif /* USE_SGTTY */
void
ttputc(c)
int c;
{
putchar(c);
}
void
ttflush()
{
fflush(stdout);
}
extern int tungotc;
/*
* Read a character from the terminal, performing no editing and doing no echo
* at all.
*/
int
ttgetc()
{
#if USE_FCNTL
int n;
if( kbd_char_present ) {
kbd_char_present = FALSE;
} else {
if( kbd_is_polled && fcntl( 0, F_SETFL, kbd_flags ) < 0 )
imdying(2);
kbd_is_polled = FALSE;
n = read(0, &kbd_char, 1);
if (n <= 0) {
if (n < 0 && errno == EINTR)
return -1;
imdying(2);
}
}
return ( kbd_char & 0x7f );
#else /* USE_FCNTL */
int c;
c = getchar();
if (c == EOF) {
if (errno == EINTR)
return -1;
imdying(2);
} else {
c &= 0x7f;
}
return c;
#endif
}
/* typahead: Check to see if any characters are already in the
keyboard buffer
*/
int
typahead()
{
#if NeWS
return(inhibit_update) ;
#else
# if X11
return x_key_events_ready();
# else
if (tungotc > 0)
return TRUE;
# if USE_FIONREAD
{
long x;
return((ioctl(0,FIONREAD,&x) < 0) ? 0 : (int)x);
}
# else
# if USE_FCNTL
if( !kbd_char_present )
{
if( !kbd_is_polled &&
fcntl(0, F_SETFL, kbd_flags|O_NDELAY ) < 0 )
return(FALSE);
kbd_is_polled = TRUE; /* I think */
kbd_char_present = (1 == read( 0, &kbd_char, 1 ));
}
return ( kbd_char_present );
# else
return FALSE;
# endif/* USE_FCNTL */
# endif/* USE_FIONREAD */
# endif /* X11 */
#endif /* NeWS */
}
/* this takes care of some stuff that's common across all ttopen's. Some of
it should arguably be somewhere else, but... */
void
ttmiscinit()
{
/* make sure backspace is bound to backspace */
asciitbl[backspc] = &f_backchar_to_bol;
/* make sure backspace is considered a backspace by the code */
_chartypes_[backspc] |= _bspace;
/* no buffering on input */
setbuf(stdin, NULL);
}
#else /* not UNIX */
#if MSDOS && (TURBO || MSC)
#include <conio.h>
#endif
#if AMIGA
#define NEW 1006L
#define AMG_MAXBUF 1024L
static long terminal;
static char scrn_tmp[AMG_MAXBUF+1];
static long scrn_tmp_p = 0;
#endif
#if ST520 && MEGAMAX
#include <osbind.h>
int STscancode = 0;
#endif
#if VMS
#include <stsdef.h>
#include <ssdef.h>
#include <descrip.h>
#include <iodef.h>
#include <ttdef.h>
#include <tt2def.h>
#define NIBUF 128 /* Input buffer size */
#define NOBUF 1024 /* MM says bug buffers win! */
#define EFN 0 /* Event flag */
char obuf[NOBUF]; /* Output buffer */
int nobuf; /* # of bytes in above */
char ibuf[NIBUF]; /* Input buffer */
int nibuf; /* # of bytes in above */
int ibufi; /* Read index */
int oldmode[3]; /* Old TTY mode bits */
int newmode[3]; /* New TTY mode bits */
short iochan; /* TTY I/O channel */
#endif
#if CPM
#include <bdos.h>
#endif
#if MSDOS && (LATTICE || TURBO || AZTEC || MWC86 || ZTC)
union REGS rg; /* cpu register for use of DOS calls */
int nxtchar = -1; /* character held from type ahead */
#endif
#if RAINBOW
#include "rainbow.h"
#endif
extern CMDFUNC f_backchar;
extern CMDFUNC f_backchar_to_bol;
void
ttopen()
{
#if AMIGA
char oline[NSTRING];
#if AZTEC
extern Enable_Abort; /* Turn off ctrl-C interrupt */
Enable_Abort = 0; /* for the Manx compiler */
#endif
strcpy(oline, "RAW:0/0/640/200/");
strcat(oline, PROGNAME);
strcat(oline, " ");
strcat(oline, VERSION);
strcat(oline, "/Amiga");
terminal = Open(oline, NEW);
#endif
#if VMS
struct dsc$descriptor idsc;
struct dsc$descriptor odsc;
char oname[40];
int iosb[2];
int status;
odsc.dsc$a_pointer = "TT";
odsc.dsc$w_length = strlen(odsc.dsc$a_pointer);
odsc.dsc$b_dtype = DSC$K_DTYPE_T;
odsc.dsc$b_class = DSC$K_CLASS_S;
idsc.dsc$b_dtype = DSC$K_DTYPE_T;
idsc.dsc$b_class = DSC$K_CLASS_S;
do {
idsc.dsc$a_pointer = odsc.dsc$a_pointer;
idsc.dsc$w_length = odsc.dsc$w_length;
odsc.dsc$a_pointer = &oname[0];
odsc.dsc$w_length = sizeof(oname);
status = LIB$SYS_TRNLOG(&idsc, &odsc.dsc$w_length, &odsc);
if (status!=SS$_NORMAL && status!=SS$_NOTRAN)
exit(status);
if (oname[0] == 0x1B) {
odsc.dsc$a_pointer += 4;
odsc.dsc$w_length -= 4;
}
} while (status == SS$_NORMAL);
status = SYS$ASSIGN(&odsc, &iochan, 0, 0);
if (status != SS$_NORMAL)
exit(status);
status = SYS$QIOW(EFN, iochan, IO$_SENSEMODE, iosb, 0, 0,
oldmode, sizeof(oldmode), 0, 0, 0, 0);
if (status!=SS$_NORMAL || (iosb[0]&0xFFFF)!=SS$_NORMAL)
exit(status);
newmode[0] = oldmode[0];
newmode[1] = oldmode[1] | TT$M_NOECHO;
newmode[1] &= ~(TT$M_TTSYNC|TT$M_HOSTSYNC);
newmode[2] = oldmode[2] | TT2$M_PASTHRU;
status = SYS$QIOW(EFN, iochan, IO$_SETMODE, iosb, 0, 0,
newmode, sizeof(newmode), 0, 0, 0, 0);
if (status!=SS$_NORMAL || (iosb[0]&0xFFFF)!=SS$_NORMAL)
exit(status);
term.t_nrow = (newmode[1]>>24) - 1;
term.t_ncol = newmode[0]>>16;
#endif
#if CPM
#endif
#if MSDOS && (HP150 == 0) && LATTICE
/* kill the ctrl-break interrupt */
rg.h.ah = 0x33; /* control-break check dos call */
rg.h.al = 1; /* set the current state */
rg.h.dl = 0; /* set it OFF */
intdos(&rg, &rg); /* go for it! */
#endif
/* make sure backspace is bound to backspace */
asciitbl[backspc] = &f_backchar_to_bol;
/* make sure backspace is considered a backspace by the code */
_chartypes_[backspc] |= _bspace;
}
void
ttclose()
{
#if AMIGA
#if LATTICE
amg_flush();
Close(terminal);
#endif
#if AZTEC
amg_flush();
Enable_Abort = 1; /* Fix for Manx */
Close(terminal);
#endif
#endif
#if VMS
int status;
int iosb[1];
ttflush();
status = SYS$QIOW(EFN, iochan, IO$_SETMODE, iosb, 0, 0,
oldmode, sizeof(oldmode), 0, 0, 0, 0);
if (status!=SS$_NORMAL || (iosb[0]&0xFFFF)!=SS$_NORMAL)
exit(status);
status = SYS$DASSGN(iochan);
if (status != SS$_NORMAL)
exit(status);
#endif
#if MSDOS && (HP150 == 0) && LATTICE
/* restore the ctrl-break interrupt */
rg.h.ah = 0x33; /* control-break check dos call */
rg.h.al = 1; /* set the current state */
rg.h.dl = 1; /* set it ON */
intdos(&rg, &rg); /* go for it! */
#endif
ttclean(TRUE);
}
void
ttclean(f)
int f;
{
if (f) {
movecursor(term.t_nrow, ttcol); /* don't care about column */
TTputc('\n');
TTputc('\r');
}
TTflush();
TTclose();
TTkclose();
}
void
ttunclean()
{
}
/*
* Write a character to the display. On VMS, terminal output is buffered, and
* we just put the characters in the big array, after checking for overflow.
* On CPM terminal I/O unbuffered, so we just write the byte out. Ditto on
* MS-DOS (use the very very raw console output routine).
*/
void
ttputc(c)
int c;
{
#if AMIGA
scrn_tmp[scrn_tmp_p++] = c;
if(scrn_tmp_p>=AMG_MAXBUF)
amg_flush();
#endif
#if ST520 && MEGAMAX
Bconout(2,c);
#endif
#if VMS
if (nobuf >= NOBUF)
ttflush();
obuf[nobuf++] = c;
#endif
#if CPM
bios(BCONOUT, c, 0);
#endif
#if MSDOS && MWC86
putcnb(c);
#endif
#if MSDOS && (LATTICE || AZTEC) && ~IBMPC
bdos(6, c, 0);
#endif
#if RAINBOW
Put_Char(c); /* fast video */
#endif
}
#if AMIGA
amg_flush()
{
if(scrn_tmp_p)
Write(terminal,scrn_tmp,scrn_tmp_p);
scrn_tmp_p = 0;
}
#endif
/*
* Flush terminal buffer. Does real work where the terminal output is buffered
* up. A no-operation on systems where byte at a time terminal I/O is done.
*/
void
ttflush()
{
#if AMIGA
amg_flush();
#endif
#if VMS
int status;
int iosb[2];
status = SS$_NORMAL;
if (nobuf != 0) {
status = SYS$QIOW(EFN, iochan, IO$_WRITELBLK|IO$M_NOFORMAT,
iosb, 0, 0, obuf, nobuf, 0, 0, 0, 0);
if (status == SS$_NORMAL)
status = iosb[0] & 0xFFFF;
nobuf = 0;
}
return (status);
#endif
#if CPM
#endif
#if MSDOS
#endif
}
extern int tungotc;
/*
* Read a character from the terminal, performing no editing and doing no echo
* at all. More complex in VMS that almost anyplace else, which figures. Very
* simple on CPM, because the system can do exactly what you want.
*/
int
ttgetc()
{
#if AMIGA
{
char ch;
amg_flush();
Read(terminal, &ch, 1L);
return(255 & (int)ch);
}
#endif
#if ST520 && MEGAMAX
{
long ch;
/*
* blink the cursor only if nothing is happening, this keeps the
* cursor on steadily during movement making it easier to track
*/
STcurblink(TRUE); /* the cursor blinks while we wait */
ch = Bconin(2);
STcurblink(FALSE); /* the cursor is steady while we work */
STscancode = (ch >> 16) & 0xff;
return(255 & (int)ch);
}
#endif
#if VMS
{
int status;
int iosb[2];
int term[2];
while (ibufi >= nibuf) {
ibufi = 0;
term[0] = 0;
term[1] = 0;
status = SYS$QIOW(EFN, iochan, IO$_READLBLK|IO$M_TIMED,
iosb, 0, 0, ibuf, NIBUF, 0, term, 0, 0);
if (status != SS$_NORMAL)
exit(status);
status = iosb[0] & 0xFFFF;
if (status!=SS$_NORMAL && status!=SS$_TIMEOUT)
exit(status);
nibuf = (iosb[0]>>16) + (iosb[1]>>16);
if (nibuf == 0) {
status = SYS$QIOW(EFN, iochan, IO$_READLBLK,
iosb, 0, 0, ibuf, 1, 0, term, 0, 0);
if (status != SS$_NORMAL
|| (status = (iosb[0]&0xFFFF)) != SS$_NORMAL)
exit(status);
nibuf = (iosb[0]>>16) + (iosb[1]>>16);
}
}
return (ibuf[ibufi++] & 0xFF); /* Allow multinational */
}
#endif
#if CPM
{
return (biosb(BCONIN, 0, 0));
}
#endif
#if RAINBOW
{
int c;
while ((c = Read_Keyboard()) < 0);
if ((c & Function_Key) == 0)
if (!((c & 0xFF) == 015 || (c & 0xFF) == 0177))
c &= 0xFF;
return c;
}
#endif
#if MSDOS && MWC86
{
return (getcnb());
}
#endif
#if MSDOS && MSC
{
return getch();
}
#endif
#if MSDOS && (LATTICE || TURBO || AZTEC || ZTC)
{
int c;
/* if a char already is ready, return it */
if (nxtchar >= 0) {
c = nxtchar;
nxtchar = -1;
return(c);
}
/* call the dos to get a char */
rg.h.ah = 7; /* dos Direct Console Input call */
intdos(&rg, &rg);
c = rg.h.al; /* grab the char */
return(c & 0xff);
}
#endif
}
/* typahead: Check to see if any characters are already in the
keyboard buffer
*/
int
typahead()
{
#if MSDOS && (MSC || TURBO || ZTC)
if (tungotc > 0)
return TRUE;
if (kbhit() != 0)
return(TRUE);
else
return(FALSE);
#endif
#if MSDOS && (LATTICE || AZTEC || MWC86)
int c; /* character read */
int flags; /* cpu flags from dos call */
if (tungotc > 0)
return TRUE;
if (nxtchar >= 0)
return(TRUE);
rg.h.ah = 6; /* Direct Console I/O call */
rg.h.dl = 255; /* does console input */
#if LATTICE || AZTEC
flags = intdos(&rg, &rg);
#else
intcall(&rg, &rg, 0x21);
flags = rg.x.flags;
#endif
c = rg.h.al; /* grab the character */
/* no character pending */
if ((flags & 0x40) != 0)
return(FALSE);
/* save the character and return true */
nxtchar = c;
return(TRUE);
#endif
}
#endif /* not UNIX */