323 lines
8.5 KiB
C
323 lines
8.5 KiB
C
/*-
|
|
* Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
|
|
* Copyright (c) 1992-1998 Søren Schmidt
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer,
|
|
* without modification, immediately at the beginning of the file.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "opt_syscons.h"
|
|
|
|
#ifndef SC_NO_HISTORY
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/consio.h>
|
|
#include <sys/tty.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <machine/pc/display.h>
|
|
|
|
#include <dev/syscons/syscons.h>
|
|
|
|
/*
|
|
* XXX Placeholder.
|
|
* This calculations should be dynamically scaled by number of seperate sc
|
|
* devices. A base value of 'extra_history_size' should be defined for
|
|
* each syscons unit, and added and subtracted from the dynamic
|
|
* 'extra_history_size' as units are added and removed. This way, each time
|
|
* a new syscons unit goes online, extra_history_size is automatically bumped.
|
|
*/
|
|
#define MAXSC 1
|
|
|
|
#if !defined(SC_MAX_HISTORY_SIZE)
|
|
#define SC_MAX_HISTORY_SIZE (1000 * MAXCONS * MAXSC)
|
|
#endif
|
|
|
|
#if !defined(SC_HISTORY_SIZE)
|
|
#define SC_HISTORY_SIZE (ROW * 4)
|
|
#endif
|
|
|
|
#if (SC_HISTORY_SIZE * MAXCONS * MAXSC) > SC_MAX_HISTORY_SIZE
|
|
#undef SC_MAX_HISTORY_SIZE
|
|
#define SC_MAX_HISTORY_SIZE (SC_HISTORY_SIZE * MAXCONS * MAXSC)
|
|
#endif
|
|
|
|
/* local variables */
|
|
static int extra_history_size
|
|
= SC_MAX_HISTORY_SIZE - SC_HISTORY_SIZE*MAXCONS;
|
|
|
|
/* local functions */
|
|
static void copy_history(sc_vtb_t *from, sc_vtb_t *to);
|
|
static void history_to_screen(scr_stat *scp);
|
|
|
|
/* allocate a history buffer */
|
|
int
|
|
sc_alloc_history_buffer(scr_stat *scp, int lines, int prev_ysize, int wait)
|
|
{
|
|
/*
|
|
* syscons unconditionally allocates buffers upto
|
|
* SC_HISTORY_SIZE lines or scp->ysize lines, whichever
|
|
* is larger. A value greater than that is allowed,
|
|
* subject to extra_history_size.
|
|
*/
|
|
sc_vtb_t *history;
|
|
sc_vtb_t *prev_history;
|
|
int cur_lines; /* current buffer size */
|
|
int min_lines; /* guaranteed buffer size */
|
|
int delta; /* lines to put back */
|
|
|
|
if (lines <= 0)
|
|
lines = SC_HISTORY_SIZE; /* use the default value */
|
|
|
|
/* make it at least as large as the screen size */
|
|
lines = imax(lines, scp->ysize);
|
|
|
|
/* remove the history buffer while we update it */
|
|
history = prev_history = scp->history;
|
|
scp->history = NULL;
|
|
|
|
/* calculate the amount of lines to put back to extra_history_size */
|
|
delta = 0;
|
|
if (prev_history) {
|
|
cur_lines = sc_vtb_rows(history);
|
|
min_lines = imax(SC_HISTORY_SIZE, prev_ysize);
|
|
if (cur_lines > min_lines)
|
|
delta = cur_lines - min_lines;
|
|
}
|
|
|
|
/* lines upto min_lines are always allowed. */
|
|
min_lines = imax(SC_HISTORY_SIZE, scp->ysize);
|
|
if (lines > min_lines) {
|
|
if (lines - min_lines > extra_history_size + delta) {
|
|
/* too many lines are requested */
|
|
scp->history = prev_history;
|
|
return EINVAL;
|
|
}
|
|
}
|
|
|
|
/* allocate a new buffer */
|
|
history = (sc_vtb_t *)malloc(sizeof(*history),
|
|
M_DEVBUF,
|
|
(wait) ? M_WAITOK : M_NOWAIT);
|
|
if (history != NULL) {
|
|
if (lines > min_lines)
|
|
extra_history_size -= lines - min_lines;
|
|
/* XXX error check? */
|
|
sc_vtb_init(history, VTB_RINGBUFFER, scp->xsize, lines,
|
|
NULL, wait);
|
|
/* FIXME: XXX no good? */
|
|
sc_vtb_clear(history, scp->sc->scr_map[0x20],
|
|
SC_NORM_ATTR << 8);
|
|
if (prev_history != NULL)
|
|
copy_history(prev_history, history);
|
|
scp->history_pos = sc_vtb_tail(history);
|
|
} else {
|
|
scp->history_pos = 0;
|
|
}
|
|
|
|
/* destroy the previous buffer */
|
|
if (prev_history != NULL) {
|
|
extra_history_size += delta;
|
|
sc_vtb_destroy(prev_history);
|
|
free(prev_history, M_DEVBUF);
|
|
}
|
|
|
|
scp->history = history;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
copy_history(sc_vtb_t *from, sc_vtb_t *to)
|
|
{
|
|
int lines;
|
|
int cols;
|
|
int cols1;
|
|
int cols2;
|
|
int pos;
|
|
int i;
|
|
|
|
lines = sc_vtb_rows(from);
|
|
cols1 = sc_vtb_cols(from);
|
|
cols2 = sc_vtb_cols(to);
|
|
cols = imin(cols1, cols2);
|
|
pos = sc_vtb_tail(from);
|
|
for (i = 0; i < lines; ++i) {
|
|
sc_vtb_append(from, pos, to, cols);
|
|
if (cols < cols2)
|
|
sc_vtb_seek(to, sc_vtb_pos(to,
|
|
sc_vtb_tail(to),
|
|
cols2 - cols));
|
|
pos = sc_vtb_pos(from, pos, cols1);
|
|
}
|
|
}
|
|
|
|
void
|
|
sc_free_history_buffer(scr_stat *scp, int prev_ysize)
|
|
{
|
|
sc_vtb_t *history;
|
|
int cur_lines; /* current buffer size */
|
|
int min_lines; /* guaranteed buffer size */
|
|
|
|
history = scp->history;
|
|
scp->history = NULL;
|
|
if (history == NULL)
|
|
return;
|
|
|
|
cur_lines = sc_vtb_rows(history);
|
|
min_lines = imax(SC_HISTORY_SIZE, prev_ysize);
|
|
extra_history_size += (cur_lines > min_lines) ?
|
|
cur_lines - min_lines : 0;
|
|
|
|
sc_vtb_destroy(history);
|
|
free(history, M_DEVBUF);
|
|
}
|
|
|
|
/* copy entire screen into the top of the history buffer */
|
|
void
|
|
sc_hist_save(scr_stat *scp)
|
|
{
|
|
sc_vtb_append(&scp->vtb, 0, scp->history, scp->xsize*scp->ysize);
|
|
scp->history_pos = sc_vtb_tail(scp->history);
|
|
}
|
|
|
|
/* restore the screen by copying from the history buffer */
|
|
int
|
|
sc_hist_restore(scr_stat *scp)
|
|
{
|
|
int ret;
|
|
|
|
if (scp->history_pos != sc_vtb_tail(scp->history)) {
|
|
scp->history_pos = sc_vtb_tail(scp->history);
|
|
history_to_screen(scp);
|
|
ret = 0;
|
|
} else {
|
|
ret = 1;
|
|
}
|
|
sc_vtb_seek(scp->history, sc_vtb_pos(scp->history,
|
|
sc_vtb_tail(scp->history),
|
|
-scp->xsize*scp->ysize));
|
|
return ret;
|
|
}
|
|
|
|
/* copy screen-full of saved lines */
|
|
static void
|
|
history_to_screen(scr_stat *scp)
|
|
{
|
|
int pos;
|
|
int i;
|
|
|
|
pos = scp->history_pos;
|
|
for (i = 1; i <= scp->ysize; ++i) {
|
|
pos = sc_vtb_pos(scp->history, pos, -scp->xsize);
|
|
sc_vtb_copy(scp->history, pos,
|
|
&scp->vtb, scp->xsize*(scp->ysize - i),
|
|
scp->xsize);
|
|
}
|
|
mark_all(scp);
|
|
}
|
|
|
|
/* go to the tail of the history buffer */
|
|
void
|
|
sc_hist_home(scr_stat *scp)
|
|
{
|
|
scp->history_pos = sc_vtb_tail(scp->history);
|
|
history_to_screen(scp);
|
|
}
|
|
|
|
/* go to the top of the history buffer */
|
|
void
|
|
sc_hist_end(scr_stat *scp)
|
|
{
|
|
scp->history_pos = sc_vtb_pos(scp->history, sc_vtb_tail(scp->history),
|
|
scp->xsize*scp->ysize);
|
|
history_to_screen(scp);
|
|
}
|
|
|
|
/* move one line up */
|
|
int
|
|
sc_hist_up_line(scr_stat *scp)
|
|
{
|
|
if (sc_vtb_pos(scp->history, scp->history_pos, -(scp->xsize*scp->ysize))
|
|
== sc_vtb_tail(scp->history))
|
|
return -1;
|
|
scp->history_pos = sc_vtb_pos(scp->history, scp->history_pos,
|
|
-scp->xsize);
|
|
history_to_screen(scp);
|
|
return 0;
|
|
}
|
|
|
|
/* move one line down */
|
|
int
|
|
sc_hist_down_line(scr_stat *scp)
|
|
{
|
|
if (scp->history_pos == sc_vtb_tail(scp->history))
|
|
return -1;
|
|
scp->history_pos = sc_vtb_pos(scp->history, scp->history_pos,
|
|
scp->xsize);
|
|
history_to_screen(scp);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
sc_hist_ioctl(struct tty *tp, u_long cmd, caddr_t data, int flag,
|
|
struct thread *td)
|
|
{
|
|
scr_stat *scp;
|
|
int error;
|
|
|
|
switch (cmd) {
|
|
|
|
case CONS_HISTORY: /* set history size */
|
|
scp = SC_STAT(tp->t_dev);
|
|
if (*(int *)data <= 0)
|
|
return EINVAL;
|
|
if (scp->status & BUFFER_SAVED)
|
|
return EBUSY;
|
|
DPRINTF(5, ("lines:%d, ysize:%d, pool:%d\n",
|
|
*(int *)data, scp->ysize, extra_history_size));
|
|
error = sc_alloc_history_buffer(scp,
|
|
imax(*(int *)data, scp->ysize),
|
|
scp->ysize, TRUE);
|
|
DPRINTF(5, ("error:%d, rows:%d, pool:%d\n", error,
|
|
sc_vtb_rows(scp->history), extra_history_size));
|
|
return error;
|
|
|
|
case CONS_CLRHIST:
|
|
scp = SC_STAT(tp->t_dev);
|
|
sc_vtb_clear(scp->history, scp->sc->scr_map[0x20],
|
|
SC_NORM_ATTR << 8);
|
|
return 0;
|
|
}
|
|
|
|
return ENOIOCTL;
|
|
}
|
|
|
|
#endif /* SC_NO_HISTORY */
|