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Length: 5497 (0x1579)
Types: TextFile
Notes: UNIX file
Names: »termio.c«
└─⟦f27320a65⟧ Bits:30001972 Commodore 900 hard disk image with partial source code
└─⟦0a3c255ba⟧ UNIX V7 Filesystem
└─ ⟦this⟧ »emacs_dos/termio.c«
└─⟦f27320a65⟧ Bits:30001972 Commodore 900 hard disk image with partial source code
└─⟦f4b8d8c84⟧ UNIX V7 Filesystem
└─ ⟦this⟧ »alien/emacs/termio.c«
/*
* 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.
*/
#include <stdio.h>
#include "ed.h"
#if VMS
#include <stsdef.h>
#include <ssdef.h>
#include <descrip.h>
#include <iodef.h>
#include <ttdef.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[2]; /* Old TTY mode bits */
int newmode[2]; /* New TTY mode bits */
short iochan; /* TTY I/O channel */
#endif
#if CPM
#include <bdos.h>
#endif
#if MSDOS
#include <dos.h>
#endif
#if V7
#include <sgtty.h> /* for stty/gtty functions */
struct sgttyb ostate; /* saved tty state */
struct sgttyb nstate; /* values for editor mode */
#endif
/*
* This function is called once
* to set up the terminal device streams.
* On VMS, it translates SYS$INPUT until it
* finds the terminal, then assigns a channel to it
* and sets it raw. On CPM it is a no-op.
*/
ttopen()
{
#if VMS
struct dsc$descriptor idsc;
struct dsc$descriptor odsc;
char oname[40];
int iosb[2];
int status;
odsc.dsc$a_pointer = "SYS$INPUT";
odsc.dsc$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$M_PASSALL | TT$M_NOECHO;
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);
#endif
#if CPM
#endif
#if MSDOS
#endif
#if V7
gtty(1, &ostate); /* save old state */
gtty(1, &nstate); /* get base of new state */
nstate.sg_flags |= RAW;
nstate.sg_flags &= ~(ECHO|CRMOD); /* no echo for now... */
stty(1, &nstate); /* set mode */
#endif
}
/*
* This function gets called just
* before we go back home to the command interpreter.
* On VMS it puts the terminal back in a reasonable state.
* Another no-operation on CPM.
*/
ttclose()
{
#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 CPM
#endif
#if MSDOS
#endif
#if V7
stty(1, &ostate);
#endif
}
/*
* Write a character to the display.
* On VMS, terminal output is buffered, and
* we just put the characters in the big array,
* after cheching 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).
*/
ttputc(c)
{
#if VMS
if (nobuf >= NOBUF)
ttflush();
obuf[nobuf++] = c;
#endif
#if CPM
bios(BCONOUT, c, 0);
#endif
#if MSDOS
dosb(CONDIO, c, 0);
#endif
#if V7
fputc(c, stdout);
#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.
*/
ttflush()
{
#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$_NORMAL)
status = iosb[0] & 0xFFFF;
nobuf = 0;
}
return (status);
#endif
#if CPM
#endif
#if MSDOS
#endif
#if V7
fflush(stdout);
#endif
}
/*
* Read a character from the terminal,
* performing no editing and doing no echo at all.
* More complex in VMS that almost anyplace else, which
* figures. Very simple on CPM, because the system can
* do exactly what you want.
*/
ttgetc()
{
#if VMS
int status;
int iosb[2];
int term[2];
while (ibufi >= nibuf) {
ibufi = 0;
term[0] = 0;
term[1] = 0;
status = SYS$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 MSDOS
return (dosb(CONRAW, 0, 0));
#endif
#if V7
return(fgetc(stdin));
#endif
}