NetBSD/sys/arch/alpha/wscons/wscons_emul.c

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/* $NetBSD: wscons_emul.c,v 1.13 1997/10/27 01:37:33 thorpej Exp $ */
/*
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* Copyright (c) 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* 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.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/*
* Console emulator for a 'generic' ANSI X3.64 console.
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: wscons_emul.c,v 1.13 1997/10/27 01:37:33 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <alpha/wscons/wsconsvar.h>
#include <alpha/wscons/wscons_emul.h>
#include <alpha/wscons/ascii.h>
static int wscons_emul_input_normal __P((struct wscons_emul_data *, char));
static int wscons_emul_input_haveesc __P((struct wscons_emul_data *, char));
static void wscons_emul_docontrol __P((struct wscons_emul_data *, char));
static int wscons_emul_input_control __P((struct wscons_emul_data *, char));
void
wscons_emul_attach(we, wo)
struct wscons_emul_data *we;
const struct wscons_odev_spec *wo;
{
int i;
#ifdef DIAGNOSTIC
if (we == NULL || wo == NULL)
panic("wscons_emul_attach: bogus args");
if (wo->wo_emulfuncs == NULL)
panic("wscons_emul_attach: bogus emul functions");
#endif
if (wo->wo_nrows <= 0 || wo->wo_ncols <= 0)
panic("wscons_emul_attach: bogus size (%d/%d)",
wo->wo_nrows, wo->wo_ncols);
if (wo->wo_crow < 0 || wo->wo_ccol < 0 ||
wo->wo_crow >= wo->wo_nrows || wo->wo_ccol >= wo->wo_ncols)
panic("wscons_emul_attach: bogus location (n: %d/%d, c: %d/%d",
wo->wo_nrows, wo->wo_ncols, wo->wo_crow, wo->wo_ccol);
we->ac_state = ANSICONS_STATE_NORMAL;
we->ac_ef = wo->wo_emulfuncs;
we->ac_efa = wo->wo_emulfuncs_cookie;
we->ac_nrow = wo->wo_nrows;
we->ac_ncol = wo->wo_ncols;
we->ac_crow = wo->wo_crow;
we->ac_ccol = wo->wo_ccol;
for (i = 0; i < ANSICONS_NARGS; i++)
we->ac_args[i] = 0;
(*we->ac_ef->wef_cursor)(we->ac_efa, 1, we->ac_crow, we->ac_ccol);
}
static inline int
wscons_emul_input_normal(we, c)
struct wscons_emul_data *we;
char c;
{
int newstate = ANSICONS_STATE_NORMAL;
int n, scrollskip = we->ac_ef->wef_scrollskip;
switch (c) {
case ASCII_BEL:
wscons_kbd_bell();
break;
case ASCII_BS:
if (we->ac_ccol > 0)
we->ac_ccol--;
break;
case ASCII_HT:
n = 8 - (we->ac_ccol & 7);
if (we->ac_ccol + n >= we->ac_ncol)
n = we->ac_ncol - we->ac_ccol - 1;
(*we->ac_ef->wef_erasecols)(we->ac_efa, we->ac_crow,
we->ac_ccol, we->ac_ccol + n);
we->ac_ccol += n;
break;
case ASCII_LF:
if (we->ac_crow < we->ac_nrow - 1) {
we->ac_crow++;
break;
}
#ifdef DIAGNOSTIC
if (we->ac_crow >= we->ac_nrow)
panic("wscons_emul: didn't scroll (1)");
#endif
(*we->ac_ef->wef_copyrows)(we->ac_efa, scrollskip, 0,
we->ac_nrow - scrollskip);
(*we->ac_ef->wef_eraserows)(we->ac_efa,
we->ac_nrow - scrollskip, scrollskip);
we->ac_crow -= scrollskip - 1;
break;
case ASCII_VT:
if (we->ac_crow > 0)
we->ac_crow--;
break;
case ASCII_NP:
(*we->ac_ef->wef_eraserows)(we->ac_efa,
0, we->ac_nrow - 1);
we->ac_ccol = 0;
we->ac_crow = 0;
break;
case ASCII_CR:
we->ac_ccol = 0;
break;
case ASCII_ESC:
if (we->ac_state == ANSICONS_STATE_NORMAL) {
newstate = ANSICONS_STATE_HAVEESC;
break;
}
/* else fall through; we're printing one out */
default:
(*we->ac_ef->wef_putstr)(we->ac_efa,
we->ac_crow, we->ac_ccol, &c, 1);
we->ac_ccol++;
/* if the current column is still on the current line, done. */
if (we->ac_ccol < we->ac_ncol)
break;
/* wrap the column around. */
we->ac_ccol = 0;
/* if the current row isn't the last, increment and leave. */
if (we->ac_crow < we->ac_nrow - 1) {
we->ac_crow++;
break;
}
#ifdef DIAGNOSTIC
/* check against row overflow */
if (we->ac_crow >= we->ac_nrow)
panic("wscons_emul: didn't scroll (2)");
#endif
/* scroll all of the rows up one; leave current row # alone */
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(*we->ac_ef->wef_copyrows)(we->ac_efa, scrollskip, 0,
we->ac_nrow - scrollskip);
(*we->ac_ef->wef_eraserows)(we->ac_efa,
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we->ac_nrow - scrollskip, scrollskip);
we->ac_crow -= scrollskip - 1;
break;
}
return newstate;
}
static inline int
wscons_emul_input_haveesc(we, c)
struct wscons_emul_data *we;
char c;
{
int newstate = ANSICONS_STATE_NORMAL;
int i;
switch (c) {
case '[':
for (i = 0; i < ANSICONS_NARGS; i++)
we->ac_args[i] = 0;
newstate = ANSICONS_STATE_CONTROL;
break;
default:
wscons_emul_input_normal(we, ASCII_ESC); /* special cased */
newstate = wscons_emul_input_normal(we, c);
break;
}
return newstate;
}
static inline void
wscons_emul_docontrol(we, c)
struct wscons_emul_data *we;
char c;
{
int n, m;
#if 0
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printf("control: %c: %d, %d\n", c, we->ac_args[0], we->ac_args[1]);
#endif
switch (c) {
case 'A': /* Cursor Up */
n = we->ac_args[0] ? we->ac_args[0] : 1;
n = min(n, we->ac_crow);
we->ac_crow -= n;
break;
case 'B': /* Cursor Down */
n = we->ac_args[0] ? we->ac_args[0] : 1;
n = min(n, we->ac_nrow - we->ac_crow - 1);
we->ac_crow += n;
break;
case 'C': /* Cursor Forward */
n = we->ac_args[0] ? we->ac_args[0] : 1;
n = min(n, we->ac_ncol - we->ac_ccol - 1);
we->ac_ccol += n;
break;
case 'D': /* Cursor Backward */
n = we->ac_args[0] ? we->ac_args[0] : 1;
n = min(n, we->ac_ccol);
we->ac_ccol -= n;
break;
case 'E': /* Cursor Next Line */
n = we->ac_args[0] ? we->ac_args[0] : 1;
n = min(n, we->ac_nrow - we->ac_crow - 1);
we->ac_crow += n;
we->ac_ccol = 0;
break;
case 'f': /* Horizontal and Vertical Position */
case 'H': /* Cursor Position */
m = we->ac_args[1] ? we->ac_args[1] : 1; /* arg 1 */
m = min(m, we->ac_nrow);
n = we->ac_args[0] ? we->ac_args[0] : 1; /* arg 2 */
n = min(n, we->ac_ncol);
we->ac_crow = m - 1;
we->ac_ccol = n - 1;
break;
case 'J': /* Erase in Display */
(*we->ac_ef->wef_erasecols)(we->ac_efa, we->ac_crow,
we->ac_ccol, we->ac_ncol - we->ac_ccol);
if (we->ac_crow + 1 < we->ac_nrow)
(*we->ac_ef->wef_eraserows)(we->ac_efa,
we->ac_crow + 1, we->ac_nrow - we->ac_crow - 1);
break;
case 'K': /* Erase in Line */
(*we->ac_ef->wef_erasecols)(we->ac_efa, we->ac_crow,
we->ac_ccol, we->ac_ncol - we->ac_ccol);
break;
case 'L': /* Insert Line */
{
int copy_src, copy_dst, copy_nlines;
n = we->ac_args[0] ? we->ac_args[0] : 1;
n = min(n, we->ac_nrow - we->ac_crow);
copy_src = we->ac_crow;
copy_dst = we->ac_crow + n;
copy_nlines = we->ac_nrow - copy_dst;
if (copy_nlines > 0)
(*we->ac_ef->wef_copyrows)(we->ac_efa,
copy_src, copy_dst, copy_nlines);
(*we->ac_ef->wef_eraserows)(we->ac_efa,
we->ac_crow, n);
}
break;
case 'M': /* Delete Line */
{
int copy_src, copy_dst, copy_nlines;
n = we->ac_args[0] ? we->ac_args[0] : 1;
n = min(n, we->ac_nrow - we->ac_crow);
copy_src = we->ac_crow + n;
copy_dst = we->ac_crow;
copy_nlines = we->ac_nrow - copy_src;
if (copy_nlines > 0)
(*we->ac_ef->wef_copyrows)(we->ac_efa,
copy_src, copy_dst, copy_nlines);
(*we->ac_ef->wef_eraserows)(we->ac_efa,
we->ac_crow + copy_nlines,
we->ac_nrow - (we->ac_crow + copy_nlines));
}
break;
case 'P': /* Delete Character */
{
int copy_src, copy_dst, copy_ncols;
n = we->ac_args[0] ? we->ac_args[0] : 1;
n = min(n, we->ac_ncol - we->ac_ccol);
copy_src = we->ac_ccol + n;
copy_dst = we->ac_ccol;
copy_ncols = we->ac_ncol - copy_src;
if (copy_ncols > 0)
(*we->ac_ef->wef_copycols)(we->ac_efa,
we->ac_crow, copy_src, copy_dst,
copy_ncols);
(*we->ac_ef->wef_erasecols)(we->ac_efa,
we->ac_crow, we->ac_ccol + copy_ncols,
we->ac_ncol - (we->ac_ccol + copy_ncols));
break;
}
break;
}
}
static inline int
wscons_emul_input_control(we, c)
struct wscons_emul_data *we;
char c;
{
int newstate = ANSICONS_STATE_CONTROL;
int i;
switch (c) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
we->ac_args[0] *= 10;
we->ac_args[0] += c - '0';
break;
case ';':
for (i = 0; i < ANSICONS_NARGS - 1; i++)
we->ac_args[i + 1] = we->ac_args[i];
we->ac_args[0] = 0;
break;
default:
wscons_emul_docontrol(we, c);
newstate = ANSICONS_STATE_NORMAL;
break;
}
return newstate;
}
void
wscons_emul_input(we, cp, n)
struct wscons_emul_data *we;
char *cp;
int n;
{
int newstate;
(*we->ac_ef->wef_cursor)(we->ac_efa, 0, we->ac_crow, we->ac_ccol);
for (; n; n--, cp++) {
switch (we->ac_state) {
case ANSICONS_STATE_NORMAL:
newstate = wscons_emul_input_normal(we, *cp);
break;
case ANSICONS_STATE_HAVEESC:
newstate = wscons_emul_input_haveesc(we, *cp);
break;
case ANSICONS_STATE_CONTROL:
newstate = wscons_emul_input_control(we, *cp);
break;
default:
#ifdef DIAGNOSTIC
panic("wscons_emul: invalid state %d\n", we->ac_state);
#endif
/* try to recover, if things get screwed up... */
newstate = ANSICONS_STATE_NORMAL;
break;
}
we->ac_state = newstate;
}
(*we->ac_ef->wef_cursor)(we->ac_efa, 1, we->ac_crow, we->ac_ccol);
}