1995-05-30 08:16:23 +00:00
|
|
|
/*
|
1993-06-12 14:58:17 +00:00
|
|
|
* Mach Operating System
|
|
|
|
* Copyright (c) 1991,1990 Carnegie Mellon University
|
|
|
|
* All Rights Reserved.
|
1995-05-30 08:16:23 +00:00
|
|
|
*
|
1993-06-12 14:58:17 +00:00
|
|
|
* Permission to use, copy, modify and distribute this software and its
|
|
|
|
* documentation is hereby granted, provided that both the copyright
|
|
|
|
* notice and this permission notice appear in all copies of the
|
|
|
|
* software, derivative works or modified versions, and any portions
|
|
|
|
* thereof, and that both notices appear in supporting documentation.
|
1995-05-30 08:16:23 +00:00
|
|
|
*
|
|
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
|
1993-06-12 14:58:17 +00:00
|
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
|
|
|
|
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
1995-05-30 08:16:23 +00:00
|
|
|
*
|
1993-06-12 14:58:17 +00:00
|
|
|
* Carnegie Mellon requests users of this software to return to
|
1995-05-30 08:16:23 +00:00
|
|
|
*
|
1993-06-12 14:58:17 +00:00
|
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
|
|
* School of Computer Science
|
|
|
|
* Carnegie Mellon University
|
|
|
|
* Pittsburgh PA 15213-3890
|
1995-05-30 08:16:23 +00:00
|
|
|
*
|
1993-06-12 14:58:17 +00:00
|
|
|
* any improvements or extensions that they make and grant Carnegie the
|
|
|
|
* rights to redistribute these changes.
|
|
|
|
*
|
1999-08-28 01:08:13 +00:00
|
|
|
* $FreeBSD$
|
1993-06-12 14:58:17 +00:00
|
|
|
*/
|
1993-10-16 16:47:35 +00:00
|
|
|
|
1993-06-12 14:58:17 +00:00
|
|
|
/*
|
|
|
|
* Author: David B. Golub, Carnegie Mellon University
|
|
|
|
* Date: 7/90
|
|
|
|
*/
|
|
|
|
|
1994-08-13 03:50:34 +00:00
|
|
|
#include <sys/param.h>
|
|
|
|
#include <sys/systm.h>
|
1999-08-09 10:35:05 +00:00
|
|
|
#include <sys/cons.h>
|
1995-12-10 19:08:32 +00:00
|
|
|
|
1994-08-13 03:50:34 +00:00
|
|
|
#include <ddb/ddb.h>
|
|
|
|
#include <ddb/db_output.h>
|
1993-06-12 14:58:17 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Character input and editing.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We don't track output position while editing input,
|
|
|
|
* since input always ends with a new-line. We just
|
|
|
|
* reset the line position at the end.
|
|
|
|
*/
|
1995-12-10 13:32:43 +00:00
|
|
|
static char * db_lbuf_start; /* start of input line buffer */
|
|
|
|
static char * db_lbuf_end; /* end of input line buffer */
|
|
|
|
static char * db_lc; /* current character */
|
|
|
|
static char * db_le; /* one past last character */
|
1993-06-12 14:58:17 +00:00
|
|
|
|
1996-08-10 13:38:44 +00:00
|
|
|
/*
|
|
|
|
* Simple input line history support.
|
|
|
|
*/
|
1997-11-20 16:53:23 +00:00
|
|
|
static char db_lhistory[2048];
|
1996-08-10 13:38:44 +00:00
|
|
|
static int db_lhistlsize, db_lhistidx, db_lhistcur;
|
1997-11-09 06:30:29 +00:00
|
|
|
static int db_lhist_nlines;
|
1996-08-10 13:38:44 +00:00
|
|
|
|
1993-06-12 14:58:17 +00:00
|
|
|
#define CTRL(c) ((c) & 0x1f)
|
|
|
|
#define BLANK ' '
|
|
|
|
#define BACKUP '\b'
|
|
|
|
|
1995-11-29 10:25:50 +00:00
|
|
|
static int cnmaygetc __P((void));
|
|
|
|
static void db_delete __P((int n, int bwd));
|
|
|
|
static int db_inputchar __P((int c));
|
|
|
|
static void db_putnchars __P((int c, int count));
|
|
|
|
static void db_putstring __P((char *s, int count));
|
1995-11-24 14:13:42 +00:00
|
|
|
|
1993-06-12 14:58:17 +00:00
|
|
|
void
|
|
|
|
db_putstring(s, count)
|
|
|
|
char *s;
|
|
|
|
int count;
|
|
|
|
{
|
|
|
|
while (--count >= 0)
|
|
|
|
cnputc(*s++);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
db_putnchars(c, count)
|
|
|
|
int c;
|
|
|
|
int count;
|
|
|
|
{
|
|
|
|
while (--count >= 0)
|
|
|
|
cnputc(c);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Delete N characters, forward or backward
|
|
|
|
*/
|
|
|
|
#define DEL_FWD 0
|
|
|
|
#define DEL_BWD 1
|
|
|
|
void
|
|
|
|
db_delete(n, bwd)
|
|
|
|
int n;
|
|
|
|
int bwd;
|
|
|
|
{
|
|
|
|
register char *p;
|
|
|
|
|
|
|
|
if (bwd) {
|
|
|
|
db_lc -= n;
|
|
|
|
db_putnchars(BACKUP, n);
|
|
|
|
}
|
|
|
|
for (p = db_lc; p < db_le-n; p++) {
|
|
|
|
*p = *(p+n);
|
|
|
|
cnputc(*p);
|
|
|
|
}
|
|
|
|
db_putnchars(BLANK, n);
|
|
|
|
db_putnchars(BACKUP, db_le - db_lc);
|
|
|
|
db_le -= n;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* returns TRUE at end-of-line */
|
|
|
|
int
|
|
|
|
db_inputchar(c)
|
|
|
|
int c;
|
|
|
|
{
|
1997-04-12 17:35:02 +00:00
|
|
|
static int escstate;
|
|
|
|
|
|
|
|
if (escstate == 1) {
|
|
|
|
/* ESC seen, look for [ or O */
|
|
|
|
if (c == '[' || c == 'O')
|
|
|
|
escstate++;
|
|
|
|
else
|
|
|
|
escstate = 0; /* re-init state machine */
|
|
|
|
return (0);
|
|
|
|
} else if (escstate == 2) {
|
|
|
|
escstate = 0;
|
|
|
|
/*
|
|
|
|
* If a valid cursor key has been found, translate
|
|
|
|
* into an emacs-style control key, and fall through.
|
|
|
|
* Otherwise, drop off.
|
|
|
|
*/
|
|
|
|
switch (c) {
|
|
|
|
case 'A': /* up */
|
|
|
|
c = CTRL('p');
|
|
|
|
break;
|
|
|
|
case 'B': /* down */
|
|
|
|
c = CTRL('n');
|
|
|
|
break;
|
|
|
|
case 'C': /* right */
|
|
|
|
c = CTRL('f');
|
|
|
|
break;
|
|
|
|
case 'D': /* left */
|
|
|
|
c = CTRL('b');
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
1993-06-12 14:58:17 +00:00
|
|
|
switch (c) {
|
1997-04-12 17:35:02 +00:00
|
|
|
case CTRL('['):
|
|
|
|
escstate = 1;
|
|
|
|
break;
|
1993-06-12 14:58:17 +00:00
|
|
|
case CTRL('b'):
|
|
|
|
/* back up one character */
|
|
|
|
if (db_lc > db_lbuf_start) {
|
|
|
|
cnputc(BACKUP);
|
|
|
|
db_lc--;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case CTRL('f'):
|
|
|
|
/* forward one character */
|
|
|
|
if (db_lc < db_le) {
|
|
|
|
cnputc(*db_lc);
|
|
|
|
db_lc++;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case CTRL('a'):
|
|
|
|
/* beginning of line */
|
|
|
|
while (db_lc > db_lbuf_start) {
|
|
|
|
cnputc(BACKUP);
|
|
|
|
db_lc--;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case CTRL('e'):
|
|
|
|
/* end of line */
|
|
|
|
while (db_lc < db_le) {
|
|
|
|
cnputc(*db_lc);
|
|
|
|
db_lc++;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case CTRL('h'):
|
|
|
|
case 0177:
|
|
|
|
/* erase previous character */
|
|
|
|
if (db_lc > db_lbuf_start)
|
|
|
|
db_delete(1, DEL_BWD);
|
|
|
|
break;
|
2002-02-11 14:14:42 +00:00
|
|
|
case CTRL('u'):
|
|
|
|
/* delete to beginning of line */
|
|
|
|
if (db_lc > db_lbuf_start)
|
|
|
|
db_delete(db_lc - db_lbuf_start, DEL_BWD);
|
|
|
|
break;
|
1993-06-12 14:58:17 +00:00
|
|
|
case CTRL('d'):
|
|
|
|
/* erase next character */
|
|
|
|
if (db_lc < db_le)
|
|
|
|
db_delete(1, DEL_FWD);
|
|
|
|
break;
|
|
|
|
case CTRL('k'):
|
|
|
|
/* delete to end of line */
|
|
|
|
if (db_lc < db_le)
|
|
|
|
db_delete(db_le - db_lc, DEL_FWD);
|
|
|
|
break;
|
|
|
|
case CTRL('t'):
|
|
|
|
/* twiddle last 2 characters */
|
|
|
|
if (db_lc >= db_lbuf_start + 2) {
|
|
|
|
c = db_lc[-2];
|
|
|
|
db_lc[-2] = db_lc[-1];
|
|
|
|
db_lc[-1] = c;
|
|
|
|
cnputc(BACKUP);
|
|
|
|
cnputc(BACKUP);
|
|
|
|
cnputc(db_lc[-2]);
|
|
|
|
cnputc(db_lc[-1]);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case CTRL('r'):
|
|
|
|
db_putstring("^R\n", 3);
|
1996-08-10 13:38:44 +00:00
|
|
|
redraw:
|
1993-06-12 14:58:17 +00:00
|
|
|
if (db_le > db_lbuf_start) {
|
|
|
|
db_putstring(db_lbuf_start, db_le - db_lbuf_start);
|
|
|
|
db_putnchars(BACKUP, db_le - db_lc);
|
|
|
|
}
|
|
|
|
break;
|
1996-08-10 13:38:44 +00:00
|
|
|
case CTRL('p'):
|
|
|
|
/* Make previous history line the active one. */
|
|
|
|
if (db_lhistcur >= 0) {
|
|
|
|
bcopy(db_lhistory + db_lhistcur * db_lhistlsize,
|
|
|
|
db_lbuf_start, db_lhistlsize);
|
|
|
|
db_lhistcur--;
|
|
|
|
goto hist_redraw;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case CTRL('n'):
|
|
|
|
/* Make next history line the active one. */
|
|
|
|
if (db_lhistcur < db_lhistidx - 1) {
|
|
|
|
db_lhistcur += 2;
|
|
|
|
bcopy(db_lhistory + db_lhistcur * db_lhistlsize,
|
|
|
|
db_lbuf_start, db_lhistlsize);
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* ^N through tail of history, reset the
|
|
|
|
* buffer to zero length.
|
|
|
|
*/
|
|
|
|
*db_lbuf_start = '\0';
|
|
|
|
db_lhistcur = db_lhistidx;
|
|
|
|
}
|
|
|
|
|
|
|
|
hist_redraw:
|
|
|
|
db_putnchars(BACKUP, db_le - db_lbuf_start);
|
|
|
|
db_putnchars(BLANK, db_le - db_lbuf_start);
|
|
|
|
db_putnchars(BACKUP, db_le - db_lbuf_start);
|
|
|
|
db_le = index(db_lbuf_start, '\0');
|
|
|
|
if (db_le[-1] == '\r' || db_le[-1] == '\n')
|
|
|
|
*--db_le = '\0';
|
|
|
|
db_lc = db_le;
|
|
|
|
goto redraw;
|
|
|
|
|
1996-10-30 21:40:25 +00:00
|
|
|
case -1:
|
|
|
|
/*
|
|
|
|
* eek! the console returned eof.
|
|
|
|
* probably that means we HAVE no console.. we should try bail
|
|
|
|
* XXX
|
|
|
|
*/
|
|
|
|
c = '\r';
|
1993-06-12 14:58:17 +00:00
|
|
|
case '\n':
|
|
|
|
case '\r':
|
|
|
|
*db_le++ = c;
|
|
|
|
return (1);
|
|
|
|
default:
|
|
|
|
if (db_le == db_lbuf_end) {
|
|
|
|
cnputc('\007');
|
|
|
|
}
|
|
|
|
else if (c >= ' ' && c <= '~') {
|
|
|
|
register char *p;
|
|
|
|
|
|
|
|
for (p = db_le; p > db_lc; p--)
|
|
|
|
*p = *(p-1);
|
|
|
|
*db_lc++ = c;
|
|
|
|
db_le++;
|
|
|
|
cnputc(c);
|
|
|
|
db_putstring(db_lc, db_le - db_lc);
|
|
|
|
db_putnchars(BACKUP, db_le - db_lc);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
1994-08-18 22:36:09 +00:00
|
|
|
int
|
1995-11-24 14:13:42 +00:00
|
|
|
cnmaygetc()
|
1994-08-18 22:36:09 +00:00
|
|
|
{
|
|
|
|
return (-1);
|
|
|
|
}
|
|
|
|
|
1993-06-12 14:58:17 +00:00
|
|
|
int
|
|
|
|
db_readline(lstart, lsize)
|
|
|
|
char * lstart;
|
|
|
|
int lsize;
|
|
|
|
{
|
1997-11-20 16:53:23 +00:00
|
|
|
if (lsize != db_lhistlsize) {
|
|
|
|
/*
|
|
|
|
* (Re)initialize input line history. Throw away any
|
|
|
|
* existing history.
|
|
|
|
*/
|
|
|
|
db_lhist_nlines = sizeof(db_lhistory) / lsize;
|
1996-08-10 13:38:44 +00:00
|
|
|
db_lhistlsize = lsize;
|
|
|
|
db_lhistidx = -1;
|
|
|
|
}
|
|
|
|
db_lhistcur = db_lhistidx;
|
|
|
|
|
1993-06-12 14:58:17 +00:00
|
|
|
db_force_whitespace(); /* synch output position */
|
|
|
|
|
|
|
|
db_lbuf_start = lstart;
|
|
|
|
db_lbuf_end = lstart + lsize;
|
|
|
|
db_lc = lstart;
|
|
|
|
db_le = lstart;
|
|
|
|
|
|
|
|
while (!db_inputchar(cngetc()))
|
|
|
|
continue;
|
|
|
|
|
1996-05-08 04:29:08 +00:00
|
|
|
db_printf("\n"); /* synch output position */
|
1993-06-12 14:58:17 +00:00
|
|
|
*db_le = 0;
|
1996-08-10 13:38:44 +00:00
|
|
|
|
1997-11-20 16:53:23 +00:00
|
|
|
if (db_le - db_lbuf_start > 1) {
|
1996-08-10 13:38:44 +00:00
|
|
|
/* Maintain input line history for non-empty lines. */
|
1997-11-09 06:30:29 +00:00
|
|
|
if (++db_lhistidx == db_lhist_nlines) {
|
1996-08-10 13:38:44 +00:00
|
|
|
/* Rotate history. */
|
|
|
|
ovbcopy(db_lhistory + db_lhistlsize, db_lhistory,
|
1997-11-09 06:30:29 +00:00
|
|
|
db_lhistlsize * (db_lhist_nlines - 1));
|
1996-08-10 13:38:44 +00:00
|
|
|
db_lhistidx--;
|
|
|
|
}
|
1997-11-20 16:53:23 +00:00
|
|
|
bcopy(lstart, db_lhistory + db_lhistidx * db_lhistlsize,
|
1996-08-10 13:38:44 +00:00
|
|
|
db_lhistlsize);
|
|
|
|
}
|
|
|
|
|
1993-06-12 14:58:17 +00:00
|
|
|
return (db_le - db_lbuf_start);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
db_check_interrupt()
|
|
|
|
{
|
|
|
|
register int c;
|
|
|
|
|
|
|
|
c = cnmaygetc();
|
|
|
|
switch (c) {
|
|
|
|
case -1: /* no character */
|
|
|
|
return;
|
|
|
|
|
|
|
|
case CTRL('c'):
|
|
|
|
db_error((char *)0);
|
|
|
|
/*NOTREACHED*/
|
|
|
|
|
|
|
|
case CTRL('s'):
|
|
|
|
do {
|
|
|
|
c = cnmaygetc();
|
|
|
|
if (c == CTRL('c'))
|
|
|
|
db_error((char *)0);
|
|
|
|
} while (c != CTRL('q'));
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
/* drop on floor */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|