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456 lines
11 KiB
C
456 lines
11 KiB
C
#include "termio.h"
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/* TERMIO.C
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*
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* The functions in this file negotiate with the operating system for
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* characters, and write characters in a barely buffered fashion on the display.
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* All operating systems.
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*
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* modified by Petri Kutvonen
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*/
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#ifndef POSIX
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#include <stdio.h>
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#include "estruct.h"
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#include "edef.h"
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/* rfi */
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#include <unistd.h>
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#include <sys/ioctl.h>
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#if VMS
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#include <stsdef.h>
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#include <ssdef.h>
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#include <descrip.h>
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#include <iodef.h>
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#include <ttdef.h>
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#include <tt2def.h>
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#define NIBUF 128 /* Input buffer size */
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#define NOBUF 1024 /* MM says bug buffers win! */
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#define EFN 0 /* Event flag */
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char obuf[NOBUF]; /* Output buffer */
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int nobuf; /* # of bytes in above */
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char ibuf[NIBUF]; /* Input buffer */
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int nibuf; /* # of bytes in above */
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int ibufi; /* Read index */
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int oldmode[3]; /* Old TTY mode bits */
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int newmode[3]; /* New TTY mode bits */
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short iochan; /* TTY I/O channel */
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#endif
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#if MSDOS & (MSC | TURBO)
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union REGS rg; /* cpu register for use of DOS calls */
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int nxtchar = -1; /* character held from type ahead */
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#endif
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#if USG /* System V */
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#include <signal.h>
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#include <termio.h>
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#include <fcntl.h>
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int kbdflgs; /* saved keyboard fd flags */
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int kbdpoll; /* in O_NDELAY mode */
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int kbdqp; /* there is a char in kbdq */
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char kbdq; /* char we've already read */
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struct termio otermio; /* original terminal characteristics */
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struct termio ntermio; /* charactoristics to use inside */
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#if XONXOFF
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#define XXMASK 0016000
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#endif
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#endif
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#if V7 | BSD
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#include <sgtty.h> /* for stty/gtty functions */
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#include <signal.h>
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struct sgttyb ostate; /* saved tty state */
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struct sgttyb nstate; /* values for editor mode */
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struct tchars otchars; /* Saved terminal special character set */
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#if XONXOFF
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struct tchars ntchars = { 0xff, 0xff, 0x11, 0x13, 0xff, 0xff };
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/* A lot of nothing and XON/XOFF */
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#else
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struct tchars ntchars = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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/* A lot of nothing */
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#endif
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#if BSD & PKCODE
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struct ltchars oltchars; /* Saved terminal local special character set */
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struct ltchars nltchars = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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/* A lot of nothing */
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#endif
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#if BSD
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#include <sys/ioctl.h> /* to get at the typeahead */
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extern int rtfrmshell(); /* return from suspended shell */
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#define TBUFSIZ 128
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char tobuf[TBUFSIZ]; /* terminal output buffer */
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#endif
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#endif
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#if __hpux | SVR4
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extern int rtfrmshell(); /* return from suspended shell */
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#define TBUFSIZ 128
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char tobuf[TBUFSIZ]; /* terminal output buffer */
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#endif
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/*
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* This function is called once to set up the terminal device streams.
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* On VMS, it translates TT until it finds the terminal, then assigns
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* a channel to it and sets it raw. On CPM it is a no-op.
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*/
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void ttopen(void)
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{
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#if VMS
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struct dsc$descriptor idsc;
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struct dsc$descriptor odsc;
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char oname[40];
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int iosb[2];
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int status;
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odsc.dsc$a_pointer = "TT";
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odsc.dsc$w_length = strlen(odsc.dsc$a_pointer);
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odsc.dsc$b_dtype = DSC$K_DTYPE_T;
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odsc.dsc$b_class = DSC$K_CLASS_S;
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idsc.dsc$b_dtype = DSC$K_DTYPE_T;
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idsc.dsc$b_class = DSC$K_CLASS_S;
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do {
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idsc.dsc$a_pointer = odsc.dsc$a_pointer;
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idsc.dsc$w_length = odsc.dsc$w_length;
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odsc.dsc$a_pointer = &oname[0];
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odsc.dsc$w_length = sizeof(oname);
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status = LIB$SYS_TRNLOG(&idsc, &odsc.dsc$w_length, &odsc);
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if (status != SS$_NORMAL && status != SS$_NOTRAN)
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exit(status);
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if (oname[0] == 0x1B) {
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odsc.dsc$a_pointer += 4;
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odsc.dsc$w_length -= 4;
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}
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} while (status == SS$_NORMAL);
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status = SYS$ASSIGN(&odsc, &iochan, 0, 0);
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if (status != SS$_NORMAL)
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exit(status);
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status = SYS$QIOW(EFN, iochan, IO$_SENSEMODE, iosb, 0, 0,
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oldmode, sizeof(oldmode), 0, 0, 0, 0);
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if (status != SS$_NORMAL || (iosb[0] & 0xFFFF) != SS$_NORMAL)
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exit(status);
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newmode[0] = oldmode[0];
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newmode[1] = oldmode[1] | TT$M_NOECHO;
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#if XONXOFF
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#else
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newmode[1] &= ~(TT$M_TTSYNC | TT$M_HOSTSYNC);
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#endif
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newmode[2] = oldmode[2] | TT2$M_PASTHRU;
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status = SYS$QIOW(EFN, iochan, IO$_SETMODE, iosb, 0, 0,
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newmode, sizeof(newmode), 0, 0, 0, 0);
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if (status != SS$_NORMAL || (iosb[0] & 0xFFFF) != SS$_NORMAL)
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exit(status);
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term.t_nrow = (newmode[1] >> 24) - 1;
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term.t_ncol = newmode[0] >> 16;
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#endif
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#if MSDOS & (TURBO | (PKCODE & MSC))
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/* kill the CONTROL-break interupt */
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rg.h.ah = 0x33; /* control-break check dos call */
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rg.h.al = 1; /* set the current state */
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rg.h.dl = 0; /* set it OFF */
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intdos(&rg, &rg); /* go for it! */
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#endif
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#if USG
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ioctl(0, TCGETA, &otermio); /* save old settings */
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ntermio.c_iflag = 0; /* setup new settings */
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#if XONXOFF
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ntermio.c_iflag = otermio.c_iflag & XXMASK; /* save XON/XOFF P.K. */
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#endif
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ntermio.c_oflag = 0;
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ntermio.c_cflag = otermio.c_cflag;
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ntermio.c_lflag = 0;
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ntermio.c_line = otermio.c_line;
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ntermio.c_cc[VMIN] = 1;
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ntermio.c_cc[VTIME] = 0;
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#if PKCODE
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ioctl(0, TCSETAW, &ntermio); /* and activate them */
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#else
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ioctl(0, TCSETA, &ntermio); /* and activate them */
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#endif
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kbdflgs = fcntl(0, F_GETFL, 0);
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kbdpoll = FALSE;
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#endif
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#if V7 | BSD
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gtty(0, &ostate); /* save old state */
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gtty(0, &nstate); /* get base of new state */
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#if XONXOFF
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nstate.sg_flags |= (CBREAK | TANDEM);
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#else
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nstate.sg_flags |= RAW;
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#endif
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nstate.sg_flags &= ~(ECHO | CRMOD); /* no echo for now... */
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stty(0, &nstate); /* set mode */
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ioctl(0, TIOCGETC, &otchars); /* Save old characters */
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ioctl(0, TIOCSETC, &ntchars); /* Place new character into K */
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#if BSD & PKCODE
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ioctl(0, TIOCGLTC, &oltchars); /* Save old local characters */
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ioctl(0, TIOCSLTC, &nltchars); /* New local characters */
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#endif
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#if BSD
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/* provide a smaller terminal output buffer so that
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the type ahead detection works better (more often) */
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setbuffer(stdout, &tobuf[0], TBUFSIZ);
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signal(SIGTSTP, SIG_DFL); /* set signals so that we can */
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signal(SIGCONT, rtfrmshell); /* suspend & restart emacs */
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#endif
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#endif
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#if __hpux | SVR4
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/* provide a smaller terminal output buffer so that
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the type ahead detection works better (more often) */
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setvbuf(stdout, &tobuf[0], _IOFBF, TBUFSIZ);
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signal(SIGTSTP, SIG_DFL); /* set signals so that we can */
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signal(SIGCONT, rtfrmshell); /* suspend & restart emacs */
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TTflush();
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#endif /* __hpux */
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/* on all screens we are not sure of the initial position
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of the cursor */
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ttrow = 999;
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ttcol = 999;
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}
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/*
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* This function gets called just before we go back home to the command
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* interpreter. On VMS it puts the terminal back in a reasonable state.
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* Another no-operation on CPM.
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*/
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void ttclose(void)
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{
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#if VMS
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int status;
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int iosb[1];
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ttflush();
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status = SYS$QIOW(EFN, iochan, IO$_SETMODE, iosb, 0, 0,
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oldmode, sizeof(oldmode), 0, 0, 0, 0);
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if (status != SS$_NORMAL || (iosb[0] & 0xFFFF) != SS$_NORMAL)
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exit(status);
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status = SYS$DASSGN(iochan);
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if (status != SS$_NORMAL)
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exit(status);
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#endif
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#if MSDOS & (TURBO | (PKCODE & MSC))
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/* restore the CONTROL-break interupt */
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rg.h.ah = 0x33; /* control-break check dos call */
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rg.h.al = 1; /* set the current state */
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rg.h.dl = 1; /* set it ON */
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intdos(&rg, &rg); /* go for it! */
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#endif
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#if USG
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#if PKCODE
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ioctl(0, TCSETAW, &otermio); /* restore terminal settings */
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#else
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ioctl(0, TCSETA, &otermio); /* restore terminal settings */
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#endif
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fcntl(0, F_SETFL, kbdflgs);
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#endif
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#if V7 | BSD
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stty(0, &ostate);
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ioctl(0, TIOCSETC, &otchars); /* Place old character into K */
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#if BSD & PKCODE
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ioctl(0, TIOCSLTC, &oltchars); /* Place old local character into K */
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#endif
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#endif
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}
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/*
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* Write a character to the display. On VMS, terminal output is buffered, and
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* we just put the characters in the big array, after checking for overflow.
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* On CPM terminal I/O unbuffered, so we just write the byte out. Ditto on
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* MS-DOS (use the very very raw console output routine).
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*/
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int ttputc( int c) {
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#if VMS
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if (nobuf >= NOBUF)
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ttflush();
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obuf[nobuf++] = c;
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#endif
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#if MSDOS & ~IBMPC
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bdos(6, c, 0);
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#endif
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#if V7 | USG | BSD
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fputc(c, stdout);
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#endif
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return 0 ;
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}
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/*
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* Flush terminal buffer. Does real work where the terminal output is buffered
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* up. A no-operation on systems where byte at a time terminal I/O is done.
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*/
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void ttflush( void) {
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#if VMS
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int status;
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int iosb[2];
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status = SS$_NORMAL;
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if (nobuf != 0) {
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status =
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SYS$QIOW(EFN, iochan, IO$_WRITELBLK | IO$M_NOFORMAT,
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iosb, 0, 0, obuf, nobuf, 0, 0, 0, 0);
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if (status == SS$_NORMAL)
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status = iosb[0] & 0xFFFF;
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nobuf = 0;
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}
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return status;
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#endif
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#if MSDOS
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#endif
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#if V7 | USG | BSD
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/*
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* Add some terminal output success checking, sometimes an orphaned
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* process may be left looping on SunOS 4.1.
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*
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* How to recover here, or is it best just to exit and lose
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* everything?
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*
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* jph, 8-Oct-1993
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*/
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#include <errno.h>
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int status;
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status = fflush(stdout);
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if (status != 0 && errno != EAGAIN) {
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exit(errno);
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}
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#endif
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}
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/*
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* Read a character from the terminal, performing no editing and doing no echo
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* at all. More complex in VMS that almost anyplace else, which figures. Very
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* simple on CPM, because the system can do exactly what you want.
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*/
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int ttgetc( void) {
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#if VMS
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int status;
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int iosb[2];
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int term[2];
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while (ibufi >= nibuf) {
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ibufi = 0;
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term[0] = 0;
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term[1] = 0;
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status = SYS$QIOW(EFN, iochan, IO$_READLBLK | IO$M_TIMED,
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iosb, 0, 0, ibuf, NIBUF, 0, term, 0, 0);
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if (status != SS$_NORMAL)
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exit(status);
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status = iosb[0] & 0xFFFF;
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if (status != SS$_NORMAL && status != SS$_TIMEOUT &&
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status != SS$_DATAOVERUN)
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exit(status);
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nibuf = (iosb[0] >> 16) + (iosb[1] >> 16);
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if (nibuf == 0) {
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status = SYS$QIOW(EFN, iochan, IO$_READLBLK,
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iosb, 0, 0, ibuf, 1, 0, term, 0,
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0);
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if (status != SS$_NORMAL
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|| (status = (iosb[0] & 0xFFFF)) != SS$_NORMAL)
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if (status != SS$_DATAOVERUN)
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exit(status);
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nibuf = (iosb[0] >> 16) + (iosb[1] >> 16);
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}
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}
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return ibuf[ibufi++] & 0xFF; /* Allow multinational */
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#endif
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#if MSDOS & (MSC | TURBO)
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int c; /* character read */
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/* if a char already is ready, return it */
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if (nxtchar >= 0) {
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c = nxtchar;
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nxtchar = -1;
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return c;
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}
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/* call the dos to get a char */
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rg.h.ah = 7; /* dos Direct Console Input call */
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intdos(&rg, &rg);
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c = rg.h.al; /* grab the char */
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return c & 255;
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#endif
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#if V7 | BSD
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return 255 & fgetc(stdin); /* 8BIT P.K. */
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#endif
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#if USG
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if (kbdqp)
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kbdqp = FALSE;
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else {
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if (kbdpoll && fcntl(0, F_SETFL, kbdflgs) < 0)
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return FALSE;
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kbdpoll = FALSE;
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while (read(0, &kbdq, 1) != 1);
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}
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return kbdq & 255;
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#endif
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}
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#if TYPEAH
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/* typahead: Check to see if any characters are already in the
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keyboard buffer
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*/
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int typahead( void)
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{
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#if MSDOS & (MSC | TURBO)
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if (kbhit() != 0)
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return TRUE;
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else
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return FALSE;
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#endif
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#if BSD
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int x; /* holds # of pending chars */
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return (ioctl(0, FIONREAD, &x) < 0) ? 0 : x;
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#endif
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#if PKCODE & VMS
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return ibufi < nibuf;
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#endif
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#if USG
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if (!kbdqp) {
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if (!kbdpoll && fcntl(0, F_SETFL, kbdflgs | O_NDELAY) < 0)
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return FALSE;
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#if PKCODE
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kbdpoll = 1;
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#endif
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kbdqp = (1 == read(0, &kbdq, 1));
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}
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return kbdqp;
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#endif
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#if !UNIX & !VMS & !MSDOS
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return FALSE;
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#endif
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}
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#endif
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#endif /* not POSIX */
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