scp_tty.c

/* scp_tty.c: operating system-dependent I/O routines

   Copyright (c) 1993-2001, Robert M Supnik

   Permission is hereby granted, free of charge, to any person obtaining a
   copy of this software and associated documentation files (the "Software"),
   to deal in the Software without restriction, including without limitation
   the rights to use, copy, modify, merge, publish, distribute, sublicense,
   and/or sell copies of the Software, and to permit persons to whom the
   Software is furnished to do so, subject to the following conditions:

   The above copyright notice and this permission notice shall be included in
   all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
   IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

   Except as contained in this notice, the name of Robert M Supnik shall not
   be used in advertising or otherwise to promote the sale, use or other dealings
   in this Software without prior written authorization from Robert M Supnik.

   05-Mar-01	RMS	Added clock calibration support
   08-Dec-00	BKR	Added OS/2 support
   18-Aug-98	RMS	Added BeOS support
   13-Oct-97	RMS	Added NetBSD terminal support
   25-Jan-97	RMS	Added POSIX terminal I/O support
   02-Jan-97	RMS	Fixed bug in sim_poll_kbd

   This module implements the following routines to support terminal I/O:

   ttinit	-	called once to get initial terminal state
   ttrunstate	-	called to put terminal into run state
   ttcmdstate	-	called to return terminal to command state
   ttclose	-	called once before the simulator exits
   sim_poll_kbd	-	poll for keyboard input
   sim_putchar	-	output character to terminal

   This module implements the following routines to support clock calibration:

   sim_os_msec	-	return elapsed time in msec

   Versions are included for VMS, Windows, OS/2, BSD UNIX, and POSIX UNIX.
   The POSIX UNIX version works with LINUX.
*/

#undef USE_INT64					/* hack for Windows */
#include "sim_defs.h"
int32 sim_int_char = 005;				/* interrupt character */

/* VMS routines */

#if defined (VMS)
#define __TTYROUTINES 0

#include <descrip.h>
#include <ttdef.h>
#include <tt2def.h>
#include <iodef.h>
#include <ssdef.h>
#include <starlet.h>
#define EFN 0
unsigned int32 tty_chan = 0;
typedef struct {
	unsigned short sense_count;
	unsigned char sense_first_char;
	unsigned char sense_reserved;
	unsigned int32 stat;
	unsigned int32 stat2; } SENSE_BUF;
typedef struct {
	unsigned int16 status;
	unsigned int16 count;
	unsigned int32 dev_status; } IOSB;
SENSE_BUF cmd_mode = { 0 };
SENSE_BUF run_mode = { 0 };

t_stat ttinit (void)
{
unsigned int32 status;
IOSB iosb;
$DESCRIPTOR (terminal_device, "tt");

status = sys$assign (&terminal_device, &tty_chan, 0, 0);
if (status != SS$_NORMAL) return SCPE_TTIERR;
status = sys$qiow (EFN, tty_chan, IO$_SENSEMODE, &iosb, 0, 0,
	&cmd_mode, sizeof (cmd_mode), 0, 0, 0, 0);
if ((status != SS$_NORMAL) || (iosb.status != SS$_NORMAL)) return SCPE_TTIERR;
run_mode = cmd_mode;
run_mode.stat = cmd_mode.stat | TT$M_NOECHO & ~(TT$M_HOSTSYNC | TT$M_TTSYNC);
run_mode.stat2 = cmd_mode.stat2 | TT2$M_PASTHRU;
return SCPE_OK;
}

t_stat ttrunstate (void)
{
unsigned int status;
IOSB iosb;

status = sys$qiow (EFN, tty_chan, IO$_SETMODE, &iosb, 0, 0,
	&run_mode, sizeof (run_mode), 0, 0, 0, 0);
if ((status != SS$_NORMAL) || (iosb.status != SS$_NORMAL)) return SCPE_TTIERR;
return SCPE_OK;
}

t_stat ttcmdstate (void)
{
unsigned int status;
IOSB iosb;

status = sys$qiow (EFN, tty_chan, IO$_SETMODE, &iosb, 0, 0,
	&cmd_mode, sizeof (cmd_mode), 0, 0, 0, 0);
if ((status != SS$_NORMAL) || (iosb.status != SS$_NORMAL)) return SCPE_TTIERR;
return SCPE_OK;
}

t_stat ttclose (void)
{
return ttcmdstate ();
}

t_stat sim_poll_kbd (void)
{
unsigned int status, term[2];
unsigned char buf[4];
IOSB iosb;
SENSE_BUF sense;

term[0] = 0; term[1] = 0;
status = sys$qiow (EFN, tty_chan, IO$_SENSEMODE | IO$M_TYPEAHDCNT, &iosb,
	0, 0, &sense, 8, 0, term, 0, 0);
if ((status != SS$_NORMAL) || (iosb.status != SS$_NORMAL)) return SCPE_TTIERR;
if (sense.sense_count == 0) return SCPE_OK;
term[0] = 0; term[1] = 0;
status = sys$qiow (EFN, tty_chan,
	IO$_READLBLK | IO$M_NOECHO | IO$M_NOFILTR | IO$M_TIMED | IO$M_TRMNOECHO,
	&iosb, 0, 0, buf, 1, 0, term, 0, 0);
if ((status != SS$_NORMAL) || (iosb.status != SS$_NORMAL)) return SCPE_OK;
if (buf[0] == sim_int_char) return SCPE_STOP;
return (buf[0] | SCPE_KFLAG);
}

t_stat sim_putchar (int32 out)
{
unsigned int status;
char c;
IOSB iosb;

c = out;
status = sys$qiow (EFN, tty_chan, IO$_WRITELBLK | IO$M_NOFORMAT,
	&iosb, 0, 0, &c, 1, 0, 0, 0, 0);
if ((status != SS$_NORMAL) || (iosb.status != SS$_NORMAL)) return SCPE_TTOERR;
return SCPE_OK;
}

const t_bool rtc_avail = TRUE;

uint32 sim_os_msec ()
{
uint32 quo, htod, tod[2];
int32 i;

sys$gettim (tod);					/* time 0.1usec */

/* To convert to msec, must divide 64b quantity by 10000.  This is actually done
   by dividing the 96b quantity 0'time by 10000, producing 64b of quotient, the
   high 32b of which are discared.  This can probably be done by a clever multiply...
*/

quo = htod = 0;
for (i = 0; i < 64; i++) {				/* 64b quo */
	htod = (htod << 1) | ((tod[1] >> 31) & 1);	/* shift divd */
	tod[1] = (tod[1] << 1) | ((tod[0] >> 31) & 1);
	tod[0] = tod[0] << 1;
	quo = quo << 1;					/* shift quo */
	if (htod >= 10000) {				/* divd work? */
		htod = htod - 10000;			/* subtract */
		quo = quo | 1;  }  }			/* set quo bit */
return quo;
}

#endif

/* Win32 routines */

#if defined (WIN32)
#define __TTYROUTINES 0
#include <conio.h>
#include <windows.h>
#include <signal.h>
static volatile int sim_win_ctlc = 0;

void win_handler (int sig)
{
sim_win_ctlc = 1;
return;
}

t_stat ttinit (void)
{
return SCPE_OK;
}

t_stat ttrunstate (void)
{
sim_win_ctlc = 0;
if ((int) signal (SIGINT, win_handler) == -1) return SCPE_SIGERR;
return SCPE_OK;
}

t_stat ttcmdstate (void)
{
return SCPE_OK;
}

t_stat ttclose (void)
{
return SCPE_OK;
}

t_stat sim_poll_kbd (void)
{
int c;

if (sim_win_ctlc) {
	sim_win_ctlc = 0;
	signal (SIGINT, win_handler);
	return 003 | SCPE_KFLAG;  }
if (!kbhit ()) return SCPE_OK;
c = _getch ();
if ((c & 0177) == '\b') c = 0177;
if ((c & 0177) == sim_int_char) return SCPE_STOP;
return c | SCPE_KFLAG;
}

t_stat sim_putchar (int32 c)
{
if (c != 0177) _putch (c);
return SCPE_OK;
}

const t_bool rtc_avail = TRUE;

uint32 sim_os_msec ()
{
return GetTickCount ();
}

#endif

/* OS/2 routines */

#ifdef __OS2__
#define __TTYROUTINES 0
#include <conio.h>

t_stat ttinit (void)
{
return SCPE_OK;
}

t_stat ttrunstate (void)
{
return SCPE_OK;
}

t_stat ttcmdstate (void)
{
return SCPE_OK;
}

t_stat ttclose (void)
{
return SCPE_OK;
}

t_stat sim_poll_kbd (void)
{
int c;

if (!kbhit ()) return SCPE_OK;
c = getch();
if ((c & 0177) == '\b') c = 0177;
if ((c & 0177) == sim_int_char) return SCPE_STOP;
return c | SCPE_KFLAG;
}

t_stat sim_putchar (int32 c)
{
if (c != 0177) {
	putch (c);
	fflush (stdout) ;  }
return SCPE_OK;
}

const t_bool rtc_avail = FALSE;

uint32 sim_os_msec ()
{
return 0;
}

#endif

/* BSD UNIX routines */

#if defined (BSDTTY)
#define __TTYROUTINES 0
#include <sgtty.h>
#include <fcntl.h>
#include <sys/time.h>

struct sgttyb cmdtty,runtty;			/* V6/V7 stty data */
struct tchars cmdtchars,runtchars;		/* V7 editing */
struct ltchars cmdltchars,runltchars;		/* 4.2 BSD editing */
int cmdfl,runfl;				/* TTY flags */

t_stat ttinit (void)
{
cmdfl = fcntl (0, F_GETFL, 0);			/* get old flags  and status */
runfl = cmdfl | FNDELAY;
if (ioctl (0, TIOCGETP, &cmdtty) < 0) return SCPE_TTIERR;
if (ioctl (0, TIOCGETC, &cmdtchars) < 0) return SCPE_TTIERR;
if (ioctl (0, TIOCGLTC, &cmdltchars) < 0) return SCPE_TTIERR;
runtty = cmdtty;				/* initial run state */
runtty.sg_flags = cmdtty.sg_flags & ~(ECHO|CRMOD) | CBREAK;
runtchars.t_intrc = sim_int_char;		/* interrupt */
runtchars.t_quitc = 0xFF;			/* no quit */
runtchars.t_startc = 0xFF;			/* no host sync */
runtchars.t_stopc = 0xFF;
runtchars.t_eofc = 0xFF;
runtchars.t_brkc = 0xFF;
runltchars.t_suspc = 0xFF;			/* no specials of any kind */
runltchars.t_dsuspc = 0xFF;
runltchars.t_rprntc = 0xFF;
runltchars.t_flushc = 0xFF;
runltchars.t_werasc = 0xFF;
runltchars.t_lnextc = 0xFF;
return SCPE_OK;					/* return success */
}

t_stat ttrunstate (void)
{
runtchars.t_intrc = sim_int_char;		/* in case changed */
fcntl (0, F_SETFL, runfl);			/* non-block mode */
if (ioctl (0, TIOCSETP, &runtty) < 0) return SCPE_TTIERR;
if (ioctl (0, TIOCSETC, &runtchars) < 0) return SCPE_TTIERR;
if (ioctl (0, TIOCSLTC, &runltchars) < 0) return SCPE_TTIERR;
return SCPE_OK;
}

t_stat ttcmdstate (void)
{
fcntl (0, F_SETFL, cmdfl);			/* block mode */
if (ioctl (0, TIOCSETP, &cmdtty) < 0) return SCPE_TTIERR;
if (ioctl (0, TIOCSETC, &cmdtchars) < 0) return SCPE_TTIERR;
if (ioctl (0, TIOCSLTC, &cmdltchars) < 0) return SCPE_TTIERR;
return SCPE_OK;
}

t_stat ttclose (void)
{
return ttcmdstate ();
}

t_stat sim_poll_kbd (void)
{
int status;
unsigned char buf[1];

status = read (0, buf, 1);
if (status != 1) return SCPE_OK;
else return (buf[0] | SCPE_KFLAG);
}

t_stat sim_putchar (int32 out)
{
char c;

c = out;
write (1, &c, 1);
return SCPE_OK;
}

const t_bool rtc_avail = TRUE;

uint32 sim_os_msec ()
{
struct timeval cur;
struct timezone foo;
uint32 msec;

gettimeofday (&cur, &foo);
msec = (((uint32) cur.tv_sec) * 1000) + (((uint32) cur.tv_usec) / 1000);
return msec;
}

#endif

/* POSIX UNIX routines */

#if !defined (__TTYROUTINES)
#include <termios.h>
#include <sys/time.h>

struct termios cmdtty, runtty;

t_stat ttinit (void)
{
if (tcgetattr (0, &cmdtty) < 0) return SCPE_TTIERR;	/* get old flags */
runtty = cmdtty;
runtty.c_lflag = runtty.c_lflag & ~(ECHO | ICANON);	/* no echo or edit */
runtty.c_oflag = runtty.c_oflag & ~OPOST;		/* no output edit */
runtty.c_iflag = runtty.c_iflag & ~ICRNL;		/* no cr conversion */
runtty.c_cc[VINTR] = sim_int_char;			/* interrupt */
runtty.c_cc[VQUIT] = 0;					/* no quit */
runtty.c_cc[VERASE] = 0;
runtty.c_cc[VKILL] = 0;
runtty.c_cc[VEOF] = 0;
runtty.c_cc[VEOL] = 0;
runtty.c_cc[VSTART] = 0;				/* no host sync */
runtty.c_cc[VSUSP] = 0;
runtty.c_cc[VSTOP] = 0;
#if defined (VREPRINT)
runtty.c_cc[VREPRINT] = 0;				/* no specials */
#endif
#if defined (VDISCARD)
runtty.c_cc[VDISCARD] = 0;
#endif
#if defined (VWERASE)
runtty.c_cc[VWERASE] = 0;
#endif
#if defined (VLNEXT)
runtty.c_cc[VLNEXT] = 0;
#endif
runtty.c_cc[VMIN] = 0;					/* no waiting */
runtty.c_cc[VTIME] = 0;
#if defined (VDSUSP)
runtty.c_cc[VDSUSP] = 0;
#endif
#if defined (VSTATUS)
runtty.c_cc[VSTATUS] = 0;
#endif
return SCPE_OK;
}

t_stat ttrunstate (void)
{
runtty.c_cc[VINTR] = sim_int_char;			/* in case changed */
if (tcsetattr (0, TCSAFLUSH, &runtty) < 0) return SCPE_TTIERR;
return SCPE_OK;
}

t_stat ttcmdstate (void)
{
if (tcsetattr (0, TCSAFLUSH, &cmdtty) < 0) return SCPE_TTIERR;
return SCPE_OK;
}

t_stat ttclose (void)
{
return ttcmdstate ();
}

t_stat sim_poll_kbd (void)
{
int status;
unsigned char buf[1];

status = read (0, buf, 1);
if (status != 1) return SCPE_OK;
else return (buf[0] | SCPE_KFLAG);
}

t_stat sim_putchar (int32 out)
{
char c;

c = out;
write (1, &c, 1);
return SCPE_OK;
}

const t_bool rtc_avail = TRUE;

uint32 sim_os_msec ()
{
struct timeval cur;
uint32 msec;

gettimeofday (&cur, NULL);
msec = (((uint32) cur.tv_sec) * 1000) + (((uint32) cur.tv_usec) / 1000);
return msec;
}

#endif