tty.c

早期freebsd实现

/* tty__getchar():
 *	Get the tty characters
 */
private void
tty__getchar(td, s)
    struct termios *td;
    unsigned char *s;
{   
# ifdef VINTR
    s[C_INTR]	= td->c_cc[VINTR];
# endif /* VINTR */
# ifdef VQUIT
    s[C_QUIT]	= td->c_cc[VQUIT];
# endif /* VQUIT */
# ifdef VERASE
    s[C_ERASE]	= td->c_cc[VERASE];
# endif /* VERASE */
# ifdef VKILL
    s[C_KILL]	= td->c_cc[VKILL];
# endif /* VKILL */
# ifdef VEOF
    s[C_EOF]	= td->c_cc[VEOF];
# endif /* VEOF */
# ifdef VEOL
    s[C_EOL]	= td->c_cc[VEOL];
# endif /* VEOL */
# ifdef VEOL2
    s[C_EOL2]	= td->c_cc[VEOL2];
# endif  /* VEOL2 */
# ifdef VSWTCH
    s[C_SWTCH]	= td->c_cc[VSWTCH];
# endif /* VSWTCH */
# ifdef VDSWTCH
    s[C_DSWTCH]	= td->c_cc[VDSWTCH];
# endif /* VDSWTCH */
# ifdef VERASE2
    s[C_ERASE2]	= td->c_cc[VERASE2];
# endif /* VERASE2 */
# ifdef VSTART
    s[C_START]	= td->c_cc[VSTART];
# endif /* VSTART */
# ifdef VSTOP
    s[C_STOP]	= td->c_cc[VSTOP];
# endif /* VSTOP */
# ifdef VWERASE
    s[C_WERASE]	= td->c_cc[VWERASE];
# endif /* VWERASE */
# ifdef VSUSP
    s[C_SUSP]	= td->c_cc[VSUSP];
# endif /* VSUSP */
# ifdef VDSUSP
    s[C_DSUSP]	= td->c_cc[VDSUSP];
# endif /* VDSUSP */
# ifdef VREPRINT
    s[C_REPRINT]= td->c_cc[VREPRINT];
# endif /* VREPRINT */
# ifdef VDISCARD
    s[C_DISCARD]= td->c_cc[VDISCARD];
# endif /* VDISCARD */
# ifdef VLNEXT
    s[C_LNEXT]	= td->c_cc[VLNEXT];
# endif /* VLNEXT */
# ifdef VSTATUS
    s[C_STATUS]	= td->c_cc[VSTATUS];
# endif /* VSTATUS */
# ifdef VPAGE
    s[C_PAGE]	= td->c_cc[VPAGE];
# endif /* VPAGE */
# ifdef VPGOFF
    s[C_PGOFF]	= td->c_cc[VPGOFF];
# endif /* VPGOFF */
# ifdef VKILL2
    s[C_KILL2]	= td->c_cc[VKILL2];
# endif /* KILL2 */
# ifdef VMIN
    s[C_MIN]	= td->c_cc[VMIN];
# endif /* VMIN */
# ifdef VTIME
    s[C_TIME]	= td->c_cc[VTIME];
# endif /* VTIME */
} /* tty__getchar */


/* tty__setchar():
 *	Set the tty characters
 */
private void
tty__setchar(td, s)
    struct termios *td;
    unsigned char *s;
{   
# ifdef VINTR
    td->c_cc[VINTR]	= s[C_INTR];
# endif /* VINTR */
# ifdef VQUIT
    td->c_cc[VQUIT]	= s[C_QUIT];
# endif /* VQUIT */
# ifdef VERASE
    td->c_cc[VERASE]	= s[C_ERASE];
# endif /* VERASE */
# ifdef VKILL
    td->c_cc[VKILL]	= s[C_KILL];
# endif /* VKILL */
# ifdef VEOF
    td->c_cc[VEOF]	= s[C_EOF];
# endif /* VEOF */
# ifdef VEOL
    td->c_cc[VEOL]	= s[C_EOL];
# endif /* VEOL */
# ifdef VEOL2
    td->c_cc[VEOL2]	= s[C_EOL2];
# endif  /* VEOL2 */
# ifdef VSWTCH
    td->c_cc[VSWTCH]	= s[C_SWTCH];
# endif /* VSWTCH */
# ifdef VDSWTCH
    td->c_cc[VDSWTCH]	= s[C_DSWTCH];
# endif /* VDSWTCH */
# ifdef VERASE2
    td->c_cc[VERASE2]	= s[C_ERASE2];
# endif /* VERASE2 */
# ifdef VSTART
    td->c_cc[VSTART]	= s[C_START];
# endif /* VSTART */
# ifdef VSTOP
    td->c_cc[VSTOP]	= s[C_STOP];
# endif /* VSTOP */
# ifdef VWERASE
    td->c_cc[VWERASE]	= s[C_WERASE];
# endif /* VWERASE */
# ifdef VSUSP
    td->c_cc[VSUSP]	= s[C_SUSP];
# endif /* VSUSP */
# ifdef VDSUSP
    td->c_cc[VDSUSP]	= s[C_DSUSP];
# endif /* VDSUSP */
# ifdef VREPRINT
    td->c_cc[VREPRINT]	= s[C_REPRINT];
# endif /* VREPRINT */
# ifdef VDISCARD
    td->c_cc[VDISCARD]	= s[C_DISCARD];
# endif /* VDISCARD */
# ifdef VLNEXT
    td->c_cc[VLNEXT]	= s[C_LNEXT];
# endif /* VLNEXT */
# ifdef VSTATUS
    td->c_cc[VSTATUS]	= s[C_STATUS];
# endif /* VSTATUS */
# ifdef VPAGE
    td->c_cc[VPAGE]	= s[C_PAGE];
# endif /* VPAGE */
# ifdef VPGOFF
    td->c_cc[VPGOFF]	= s[C_PGOFF];
# endif /* VPGOFF */
# ifdef VKILL2
    td->c_cc[VKILL2]	= s[C_KILL2];
# endif /* VKILL2 */
# ifdef VMIN
    td->c_cc[VMIN]	= s[C_MIN];
# endif /* VMIN */
# ifdef VTIME
    td->c_cc[VTIME]	= s[C_TIME];
# endif /* VTIME */
} /* tty__setchar */


/* tty_bind_char():
 *	Rebind the editline functions
 */
protected void
tty_bind_char(el, force)
    EditLine *el;
    int force;
{
    unsigned char *t_n = el->el_tty.t_c[ED_IO];
    unsigned char *t_o = el->el_tty.t_ed.c_cc;
    char new[2], old[2];
    ttymap_t *tp;
    el_action_t  *dmap, *dalt, *map, *alt;
    new[1] = old[1] = '\0';


    map = el->el_map.key;
    alt = el->el_map.alt;
    if (el->el_map.type == MAP_VI) {
	dmap = el->el_map.vii;
	dalt = el->el_map.vic;
    }
    else {
	dmap = el->el_map.emacs;
	dalt = NULL;
    }

    for (tp = tty_map; tp->nch != -1; tp++) {
	new[0] = t_n[tp->nch];
	old[0] = t_o[tp->och];
	if (new[0] == old[0] && !force)
	    continue;
	/* Put the old default binding back, and set the new binding */
	key_clear(el, map, old);
	map[old[0]] = dmap[old[0]];
	key_clear(el, map, new);
	/* MAP_VI == 1, MAP_EMACS == 0... */
	map[new[0]] = tp->bind[el->el_map.type];
	if (dalt) {
	    key_clear(el, alt, old);
	    alt[old[0]] = dalt[old[0]];
	    key_clear(el, alt, new);
	    alt[new[0]] = tp->bind[el->el_map.type+1];
	}
    }
}

/* tty_rawmode():
 * 	Set terminal into 1 character at a time mode.
 */
protected int
tty_rawmode(el)
    EditLine *el;
{
    if (el->el_tty.t_mode == ED_IO)
	return (0);

    if (tty_getty(el, &el->el_tty.t_ts) == -1) {
#ifdef DEBUG_TTY
	(void) fprintf(el->el_errfile, "tty_rawmode: tty_getty: %s\n", strerror(errno));
#endif /* DEBUG_TTY */
	return(-1);
    }

    /*
     * We always keep up with the eight bit setting and the speed of the
     * tty. But only we only believe changes that are made to cooked mode!
     */
    el->el_tty.t_eight = tty__geteightbit(&el->el_tty.t_ts);
    el->el_tty.t_speed = tty__getspeed(&el->el_tty.t_ts);

    if (tty__getspeed(&el->el_tty.t_ex) != el->el_tty.t_speed || 
	tty__getspeed(&el->el_tty.t_ed) != el->el_tty.t_speed) {
	(void) cfsetispeed(&el->el_tty.t_ex, el->el_tty.t_speed);
	(void) cfsetospeed(&el->el_tty.t_ex, el->el_tty.t_speed);
	(void) cfsetispeed(&el->el_tty.t_ed, el->el_tty.t_speed);
	(void) cfsetospeed(&el->el_tty.t_ed, el->el_tty.t_speed);
    }

    if (tty__cooked_mode(&el->el_tty.t_ts)) {
	if (el->el_tty.t_ts.c_cflag != el->el_tty.t_ex.c_cflag) { 
	    el->el_tty.t_ex.c_cflag  = el->el_tty.t_ts.c_cflag;
	    el->el_tty.t_ex.c_cflag &= ~el->el_tty.t_t[EX_IO][M_CTL].t_clrmask;
	    el->el_tty.t_ex.c_cflag |=  el->el_tty.t_t[EX_IO][M_CTL].t_setmask;

	    el->el_tty.t_ed.c_cflag  = el->el_tty.t_ts.c_cflag;
	    el->el_tty.t_ed.c_cflag &= ~el->el_tty.t_t[ED_IO][M_CTL].t_clrmask;
	    el->el_tty.t_ed.c_cflag |=  el->el_tty.t_t[ED_IO][M_CTL].t_setmask;
	}

	if ((el->el_tty.t_ts.c_lflag != el->el_tty.t_ex.c_lflag) &&
	    (el->el_tty.t_ts.c_lflag != el->el_tty.t_ed.c_lflag)) {
	    el->el_tty.t_ex.c_lflag = el->el_tty.t_ts.c_lflag;
	    el->el_tty.t_ex.c_lflag &= ~el->el_tty.t_t[EX_IO][M_LIN].t_clrmask;
	    el->el_tty.t_ex.c_lflag |=  el->el_tty.t_t[EX_IO][M_LIN].t_setmask;

	    el->el_tty.t_ed.c_lflag = el->el_tty.t_ts.c_lflag;
	    el->el_tty.t_ed.c_lflag &= ~el->el_tty.t_t[ED_IO][M_LIN].t_clrmask;
	    el->el_tty.t_ed.c_lflag |=  el->el_tty.t_t[ED_IO][M_LIN].t_setmask;
	}

	if ((el->el_tty.t_ts.c_iflag != el->el_tty.t_ex.c_iflag) &&
	    (el->el_tty.t_ts.c_iflag != el->el_tty.t_ed.c_iflag)) {
	    el->el_tty.t_ex.c_iflag = el->el_tty.t_ts.c_iflag;
	    el->el_tty.t_ex.c_iflag &= ~el->el_tty.t_t[EX_IO][M_INP].t_clrmask;
	    el->el_tty.t_ex.c_iflag |=  el->el_tty.t_t[EX_IO][M_INP].t_setmask;

	    el->el_tty.t_ed.c_iflag = el->el_tty.t_ts.c_iflag;
	    el->el_tty.t_ed.c_iflag &= ~el->el_tty.t_t[ED_IO][M_INP].t_clrmask;
	    el->el_tty.t_ed.c_iflag |=  el->el_tty.t_t[ED_IO][M_INP].t_setmask;
	}

	if ((el->el_tty.t_ts.c_oflag != el->el_tty.t_ex.c_oflag) &&
	    (el->el_tty.t_ts.c_oflag != el->el_tty.t_ed.c_oflag)) {
	    el->el_tty.t_ex.c_oflag = el->el_tty.t_ts.c_oflag;
	    el->el_tty.t_ex.c_oflag &= ~el->el_tty.t_t[EX_IO][M_OUT].t_clrmask;
	    el->el_tty.t_ex.c_oflag |=  el->el_tty.t_t[EX_IO][M_OUT].t_setmask;

	    el->el_tty.t_ed.c_oflag = el->el_tty.t_ts.c_oflag;
	    el->el_tty.t_ed.c_oflag &= ~el->el_tty.t_t[ED_IO][M_OUT].t_clrmask;
	    el->el_tty.t_ed.c_oflag |=  el->el_tty.t_t[ED_IO][M_OUT].t_setmask;
	}

	if (tty__gettabs(&el->el_tty.t_ex) == 0) 
	    el->el_tty.t_tabs = 0;
	else 
	    el->el_tty.t_tabs = EL_CAN_TAB ? 1 : 0;

	{
	    int i;

	    tty__getchar(&el->el_tty.t_ts, el->el_tty.t_c[TS_IO]);
	    /*
	     * Check if the user made any changes.
	     * If he did, then propagate the changes to the
	     * edit and execute data structures.
	     */
	    for (i = 0; i < C_NCC; i++)
		if (el->el_tty.t_c[TS_IO][i] != el->el_tty.t_c[EX_IO][i])
		    break;
		
	    if (i != C_NCC) {
		/*
		 * Propagate changes only to the unprotected chars
		 * that have been modified just now.
		 */
		for (i = 0; i < C_NCC; i++) {
		    if (!((el->el_tty.t_t[ED_IO][M_CHAR].t_setmask & C_SH(i)))
		      && (el->el_tty.t_c[TS_IO][i] != el->el_tty.t_c[EX_IO][i]))
			el->el_tty.t_c[ED_IO][i] = el->el_tty.t_c[TS_IO][i];
		    if (el->el_tty.t_t[ED_IO][M_CHAR].t_clrmask & C_SH(i))
			el->el_tty.t_c[ED_IO][i] = el->el_tty.t_vdisable;
		}
		tty_bind_char(el, 0);
		tty__setchar(&el->el_tty.t_ed, el->el_tty.t_c[ED_IO]);

		for (i = 0; i < C_NCC; i++) {
		    if (!((el->el_tty.t_t[EX_IO][M_CHAR].t_setmask & C_SH(i)))
		      && (el->el_tty.t_c[TS_IO][i] != el->el_tty.t_c[EX_IO][i]))
			el->el_tty.t_c[EX_IO][i] = el->el_tty.t_c[TS_IO][i];
		    if (el->el_tty.t_t[EX_IO][M_CHAR].t_clrmask & C_SH(i))
			el->el_tty.t_c[EX_IO][i] = el->el_tty.t_vdisable;
		}
		tty__setchar(&el->el_tty.t_ex, el->el_tty.t_c[EX_IO]);
	    }

	}
    }

    if (tty_setty(el, &el->el_tty.t_ed) == -1) {
#ifdef DEBUG_TTY
	(void) fprintf(el->el_errfile, "tty_rawmode: tty_setty: %s\n", 
		       strerror(errno));
#endif /* DEBUG_TTY */
	return -1;
    }
    el->el_tty.t_mode = ED_IO;
    return (0);
} /* end tty_rawmode */


/* tty_cookedmode():
 *	Set the tty back to normal mode
 */
protected int
tty_cookedmode(el)
    EditLine *el;
{				/* set tty in normal setup */
    if (el->el_tty.t_mode == EX_IO)
	return (0);

    if (tty_setty(el, &el->el_tty.t_ex) == -1) {
#ifdef DEBUG_TTY
	(void) fprintf(el->el_errfile, "tty_cookedmode: tty_setty: %s\n", 
		       strerror(errno));
#endif /* DEBUG_TTY */
	return -1;
    }
    el->el_tty.t_mode = EX_IO;
    return (0);
} /* end tty_cookedmode */


/* tty_quotemode():
 *	Turn on quote mode
 */
protected int
tty_quotemode(el)
    EditLine *el;
{
    if (el->el_tty.t_mode == QU_IO)
	return 0;

    el->el_tty.t_qu = el->el_tty.t_ed;

    el->el_tty.t_qu.c_iflag &= ~el->el_tty.t_t[QU_IO][M_INP].t_clrmask;
    el->el_tty.t_qu.c_iflag |=  el->el_tty.t_t[QU_IO][M_INP].t_setmask;

    el->el_tty.t_qu.c_oflag &= ~el->el_tty.t_t[QU_IO][M_OUT].t_clrmask;
    el->el_tty.t_qu.c_oflag |=  el->el_tty.t_t[QU_IO][M_OUT].t_setmask;

    el->el_tty.t_qu.c_cflag &= ~el->el_tty.t_t[QU_IO][M_CTL].t_clrmask;
    el->el_tty.t_qu.c_cflag |=  el->el_tty.t_t[QU_IO][M_CTL].t_setmask;

    el->el_tty.t_qu.c_lflag &= ~el->el_tty.t_t[QU_IO][M_LIN].t_clrmask;
    el->el_tty.t_qu.c_lflag |=  el->el_tty.t_t[QU_IO][M_LIN].t_setmask;

    if (tty_setty(el, &el->el_tty.t_qu) == -1) {
#ifdef DEBUG_TTY
	(void) fprintf(el->el_errfile, "QuoteModeOn: tty_setty: %s\n", 
		       strerror(errno));
#endif /* DEBUG_TTY */
	return -1;
    }
    el->el_tty.t_mode = QU_IO;
    return 0;
} /* end tty_quotemode */


/* tty_noquotemode():
 *	Turn off quote mode
 */
protected int
tty_noquotemode(el)
    EditLine *el;
{
    if (el->el_tty.t_mode != QU_IO)
	return 0;
    if (tty_setty(el, &el->el_tty.t_ed) == -1) {
#ifdef DEBUG_TTY
	(void) fprintf(el->el_errfile, "QuoteModeOff: tty_setty: %s\n", 
		       strerror(errno));
#endif /* DEBUG_TTY */
	return -1;
    }
    el->el_tty.t_mode = ED_IO;
    return 0;
}

/* tty_stty():
 *	Stty builtin
 */
protected int
/*ARGSUSED*/
tty_stty(el, argc, argv)
    EditLine *el;
    int argc;
    char **argv;
{
    ttymodes_t *m;
    char x, *d;
    int aflag = 0;
    char *s;
    char *name;
    int z = EX_IO;

    if (argv == NULL)
	return -1;
    name = *argv++;

    while (argv && *argv && argv[0][0] == '-' && argv[0][2] == '\0') 
	switch (argv[0][1]) {
	case 'a':
	    aflag++;
	    argv++;
	    break;
	case 'd':
	    argv++;
	    z = ED_IO;
	    break;
	case 'x':
	    argv++;
	    z = EX_IO;
	    break;
	case 'q':
	    argv++;
	    z = QU_IO;
	    break;
	default:
	    (void) fprintf(el->el_errfile, "%s: Unknown switch `%c'.\n",
			   name, argv[0][1]);
	    return -1;
	}

    if (!argv || !*argv) {
	int i = -1;
	int len = 0, st = 0, cu;
	for (m = ttymodes; m->m_name; m++) {
	    if (m->m_type != i) {
		(void) fprintf(el->el_outfile, "%s%s", i != -1 ? "\n" : "", 
			el->el_tty.t_t[z][m->m_type].t_name);
		i = m->m_type;
		st = len = strlen(el->el_tty.t_t[z][m->m_type].t_name);
	    }

	    x = (el->el_tty.t_t[z][i].t_setmask & m->m_value) ? '+' : '\0';
	    x = (el->el_tty.t_t[z][i].t_clrmask & m->m_value) ? '-' : x;

	    if (x != '\0' || aflag) {

		cu = strlen(m->m_name) + (x != '\0') + 1;

		if (len + cu >= el->el_term.t_size.h) {
		    (void) fprintf(el->el_outfile, "\n%*s", st, "");
		    len = st + cu;
		}
		else 
		    len += cu;

		if (x != '\0')
		    (void) fprintf(el->el_outfile, "%c%s ", x, m->m_name);
		else
		    (void) fprintf(el->el_outfile, "%s ", m->m_name);
	    }
	}
	(void) fprintf(el->el_outfile, "\n");
	return 0;
    }

    while (argv && (s = *argv++)) {
	switch (*s) {
	case '+':
	case '-':
	    x = *s++;
	    break;
	default:
	    x = '\0';
	    break;
	}
	d = s;
	for (m = ttymodes; m->m_name; m++)
	    if (strcmp(m->m_name, d) == 0)
		break;

	if (!m->m_name)  {
	    (void) fprintf(el->el_errfile, "%s: Invalid argument `%s'.\n",
			   name, d);
	    return -1;
	}

	switch (x) {
	case '+':
	    el->el_tty.t_t[z][m->m_type].t_setmask |= m->m_value;
	    el->el_tty.t_t[z][m->m_type].t_clrmask &= ~m->m_value;
	    break;
	case '-':
	    el->el_tty.t_t[z][m->m_type].t_setmask &= ~m->m_value;
	    el->el_tty.t_t[z][m->m_type].t_clrmask |= m->m_value;
	    break;
	default:
	    el->el_tty.t_t[z][m->m_type].t_setmask &= ~m->m_value;
	    el->el_tty.t_t[z][m->m_type].t_clrmask &= ~m->m_value;
	    break;
	}
    }
    return 0;
} /* end tty_stty */


#ifdef notyet
/* tty_printchar():
 *	DEbugging routine to print the tty characters
 */
private void
tty_printchar(el, s)
    EditLine *el;
    unsigned char *s;
{
    ttyperm_t *m;
    int i;

    for (i = 0; i < C_NCC; i++) {
	for (m = el->el_tty.t_t; m->m_name; m++) 
	    if (m->m_type == M_CHAR && C_SH(i) == m->m_value)
		break;
	if (m->m_name)
	    (void) fprintf(el->el_errfile, "%s ^%c ", m->m_name, s[i] + 'A'-1);
	if (i % 5 == 0)
	    (void) fprintf(el->el_errfile, "\n");
    }
    (void) fprintf(el->el_errfile, "\n"); 
}
#endif /* notyet */