/* $NetBSD: wsemul_vt100.c,v 1.52 2023/08/02 22:37:02 uwe Exp $ */

/* $NetBSD: wsemul_vt100.c,v 1.52 2023/08/02 22:37:02 uwe Exp $ */

/*
* Copyright (c) 1998
* Matthias Drochner. 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.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: wsemul_vt100.c,v 1.52 2023/08/02 22:37:02 uwe Exp $");

#ifdef _KERNEL_OPT
#include "opt_wsmsgattrs.h"
#endif

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/malloc.h>
#include <sys/fcntl.h>

#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/wscons/wsemulvar.h>
#include <dev/wscons/wsemul_vt100var.h>
#include <dev/wscons/ascii.h>

static void *wsemul_vt100_cnattach(const struct wsscreen_descr *, void *,
int, int, long);
static void *wsemul_vt100_attach(int console, const struct wsscreen_descr *,
void *, int, int, void *, long);
static void wsemul_vt100_output(void *cookie, const u_char *data, u_int count,
int kernel);
static void wsemul_vt100_detach(void *cookie, u_int *crowp, u_int *ccolp);
static void wsemul_vt100_resetop(void *, enum wsemul_resetops);
#ifdef WSDISPLAY_CUSTOM_OUTPUT
static void wsemul_vt100_getmsgattrs(void *, struct wsdisplay_msgattrs *);
static void wsemul_vt100_setmsgattrs(void *, const struct wsscreen_descr *,
const struct wsdisplay_msgattrs *);
#endif /* WSDISPLAY_CUSTOM_OUTPUT */
static void wsemul_vt100_resize(void *, const struct wsscreen_descr *);

const struct wsemul_ops wsemul_vt100_ops = {
.name = "vt100",
.cnattach = wsemul_vt100_cnattach,
.attach = wsemul_vt100_attach,
.output = wsemul_vt100_output,
.translate = wsemul_vt100_translate,
.detach = wsemul_vt100_detach,
.reset = wsemul_vt100_resetop,
#ifdef WSDISPLAY_CUSTOM_OUTPUT
.getmsgattrs = wsemul_vt100_getmsgattrs,
.setmsgattrs = wsemul_vt100_setmsgattrs,
#else
.getmsgattrs = NULL,
.setmsgattrs = NULL,
#endif
.resize = wsemul_vt100_resize
};

static struct wsemul_vt100_emuldata wsemul_vt100_console_emuldata;

static void wsemul_vt100_init(struct wsemul_vt100_emuldata *,
const struct wsscreen_descr *,
void *, int, int, long);

static void wsemul_vt100_output_normal(struct wsemul_vt100_emuldata *,
u_char, int);
static void wsemul_vt100_output_c0c1(struct wsemul_vt100_emuldata *,
u_char, int);

static void wsemul_vt100_nextline(struct vt100base_data *); /* IND */
static void wsemul_vt100_prevline(struct vt100base_data *); /* RI */

typedef u_int vt100_handler(struct wsemul_vt100_emuldata *, u_char);

static vt100_handler
wsemul_vt100_output_esc,
wsemul_vt100_output_csi,
wsemul_vt100_output_scs94,
wsemul_vt100_output_scs94_percent,
wsemul_vt100_output_scs96,
wsemul_vt100_output_scs96_percent,
wsemul_vt100_output_esc_hash,
wsemul_vt100_output_esc_spc,
wsemul_vt100_output_string,
wsemul_vt100_output_string_esc,
wsemul_vt100_output_dcs,
wsemul_vt100_output_dcs_dollar;

#define VT100_EMUL_STATE_NORMAL 0 /* normal processing */
#define VT100_EMUL_STATE_ESC 1 /* got ESC */
#define VT100_EMUL_STATE_CSI 2 /* got CSI (ESC[) */
#define VT100_EMUL_STATE_SCS94 3 /* got ESC{()*+} */
#define VT100_EMUL_STATE_SCS94_PERCENT 4 /* got ESC{()*+}% */
#define VT100_EMUL_STATE_SCS96 5 /* got ESC{-./} */
#define VT100_EMUL_STATE_SCS96_PERCENT 6 /* got ESC{-./}% */
#define VT100_EMUL_STATE_ESC_HASH 7 /* got ESC# */
#define VT100_EMUL_STATE_ESC_SPC 8 /* got ESC<SPC> */
#define VT100_EMUL_STATE_STRING 9 /* waiting for ST (ESC\) */
#define VT100_EMUL_STATE_STRING_ESC 10 /* waiting for ST, got ESC */
#define VT100_EMUL_STATE_DCS 11 /* got DCS (ESC P) */
#define VT100_EMUL_STATE_DCS_DOLLAR 12 /* got DCS<p>$ */

static vt100_handler *vt100_output[] = {
wsemul_vt100_output_esc,
wsemul_vt100_output_csi,
wsemul_vt100_output_scs94,
wsemul_vt100_output_scs94_percent,
wsemul_vt100_output_scs96,
wsemul_vt100_output_scs96_percent,
wsemul_vt100_output_esc_hash,
wsemul_vt100_output_esc_spc,
wsemul_vt100_output_string,
wsemul_vt100_output_string_esc,
wsemul_vt100_output_dcs,
wsemul_vt100_output_dcs_dollar,
};

static void
wsemul_vt100_init(struct wsemul_vt100_emuldata *edp,
const struct wsscreen_descr *type, void *cookie, int ccol, int crow,
long defattr)
{
struct vt100base_data *vd = &edp->bd;
int error;

vd->emulops = type->textops;
vd->emulcookie = cookie;
vd->scrcapabilities = type->capabilities;
vd->nrows = type->nrows;
vd->ncols = type->ncols;
vd->crow = crow;
vd->ccol = ccol;

/* The underlying driver has already allocated a default and simple
* attribute for us, which is stored in defattr. We try to set the
* values specified by the kernel options below, but in case of
* failure we fallback to the value given by the driver. */

if (type->capabilities & WSSCREEN_WSCOLORS) {
vd->msgattrs.default_attrs = WS_DEFAULT_COLATTR |
WSATTR_WSCOLORS;
vd->msgattrs.default_bg = WS_DEFAULT_BG;
vd->msgattrs.default_fg = WS_DEFAULT_FG;

vd->msgattrs.kernel_attrs = WS_KERNEL_COLATTR |
WSATTR_WSCOLORS;
vd->msgattrs.kernel_bg = WS_KERNEL_BG;
vd->msgattrs.kernel_fg = WS_KERNEL_FG;
} else {
vd->msgattrs.default_attrs = WS_DEFAULT_MONOATTR;
vd->msgattrs.default_bg = vd->msgattrs.default_fg = 0;

vd->msgattrs.kernel_attrs = WS_KERNEL_MONOATTR;
vd->msgattrs.kernel_bg = vd->msgattrs.kernel_fg = 0;
}

error = (*vd->emulops->allocattr)(cookie,
vd->msgattrs.default_fg,
vd->msgattrs.default_bg,
vd->msgattrs.default_attrs,
&vd->defattr);
if (error) {
vd->defattr = defattr;
/* XXX This assumes the driver has allocated white on black
* XXX as the default attribute, which is not always true.
* XXX Maybe we need an emulop that, given an attribute,
* XXX (defattr) returns its flags and colors? */
vd->msgattrs.default_attrs = 0;
vd->msgattrs.default_bg = WSCOL_BLACK;
vd->msgattrs.default_fg = WSCOL_WHITE;
} else {
if (vd->emulops->replaceattr != NULL)
(*vd->emulops->replaceattr)(cookie, defattr,
vd->defattr);
}

#if defined(WS_KERNEL_CUSTOMIZED)
/* Set up kernel colors, in case they were customized by the user;
* otherwise default to the colors specified for the console.
* In case of failure, we use console colors too; we can assume
* they are good as they have been previously allocated and
* verified. */
error = (*vd->emulops->allocattr)(cookie,
vd->msgattrs.kernel_fg,
vd->msgattrs.kernel_bg,
vd->msgattrs.kernel_attrs,
&edp->kernattr);
if (error)
#endif
edp->kernattr = vd->defattr;
}

static void *
wsemul_vt100_cnattach(const struct wsscreen_descr *type, void *cookie,
int ccol, int crow, long defattr)
{
struct wsemul_vt100_emuldata *edp;
struct vt100base_data *vd;

edp = &wsemul_vt100_console_emuldata;
vd = &edp->bd;
wsemul_vt100_init(edp, type, cookie, ccol, crow, defattr);
#ifdef DIAGNOSTIC
edp->console = 1;
#endif
vd->cbcookie = NULL;

vd->tabs = 0;
vd->dblwid = 0;
vd->dw = 0;
vd->dcsarg = 0;
edp->isolatin1tab = edp->decgraphtab = edp->dectechtab = 0;
edp->nrctab = 0;
wsemul_vt100_reset(edp);
return edp;
}

static void *
wsemul_vt100_attach(int console, const struct wsscreen_descr *type,
void *cookie, int ccol, int crow, void *cbcookie, long defattr)
{
struct wsemul_vt100_emuldata *edp;
struct vt100base_data *vd;

if (console) {
edp = &wsemul_vt100_console_emuldata;
KASSERT(edp->console == 1);
} else {
edp = malloc(sizeof *edp, M_DEVBUF, M_WAITOK);
wsemul_vt100_init(edp, type, cookie, ccol, crow, defattr);
#ifdef DIAGNOSTIC
edp->console = 0;
#endif
}
vd = &edp->bd;
vd->cbcookie = cbcookie;

vd->tabs = malloc(1024, M_DEVBUF, M_WAITOK);
vd->dblwid = malloc(1024, M_DEVBUF, M_WAITOK|M_ZERO);
vd->dw = 0;
vd->dcsarg = malloc(DCS_MAXLEN, M_DEVBUF, M_WAITOK);
edp->isolatin1tab = malloc(128 * sizeof(int), M_DEVBUF, M_WAITOK);
edp->decgraphtab = malloc(128 * sizeof(int), M_DEVBUF, M_WAITOK);
edp->dectechtab = malloc(128 * sizeof(int), M_DEVBUF, M_WAITOK);
edp->nrctab = malloc(128 * sizeof(int), M_DEVBUF, M_WAITOK);
vt100_initchartables(edp);
wsemul_vt100_reset(edp);
return edp;
}

static void
wsemul_vt100_detach(void *cookie, u_int *crowp, u_int *ccolp)
{
struct wsemul_vt100_emuldata *edp = cookie;
struct vt100base_data *vd = &edp->bd;

*crowp = vd->crow;
*ccolp = vd->ccol;
#define f(ptr) if (ptr) {free(ptr, M_DEVBUF); ptr = 0;}
f(vd->tabs)
f(vd->dblwid)
f(vd->dcsarg)
f(edp->isolatin1tab)
f(edp->decgraphtab)
f(edp->dectechtab)
f(edp->nrctab)
#undef f
if (edp != &wsemul_vt100_console_emuldata)
free(edp, M_DEVBUF);
}

static void
wsemul_vt100_resize(void * cookie, const struct wsscreen_descr *type)
{
struct wsemul_vt100_emuldata *edp = cookie;

/* XXX match malloc size in wsemul_vt100_attach */
KASSERT(type->nrows >= 0);
KASSERT(type->ncols >= 0);
KASSERT(type->nrows <= 1024);
KASSERT(type->ncols <= 1024);

edp->bd.nrows = MAX(0, MIN(type->nrows, 1024));
edp->bd.ncols = MAX(0, MIN(type->ncols, 1024));
wsemul_vt100_reset(edp);
wsemul_vt100_resetop(cookie, WSEMUL_CLEARSCREEN);
}

static void
wsemul_vt100_resetop(void *cookie, enum wsemul_resetops op)
{
struct wsemul_vt100_emuldata *edp = cookie;
struct vt100base_data *vd = &edp->bd;

switch (op) {
case WSEMUL_RESET:
wsemul_vt100_reset(edp);
break;
case WSEMUL_SYNCFONT:
vt100_initchartables(edp);
break;
case WSEMUL_CLEARSCREEN:
wsemul_vt100_ed(vd, 2);
vd->ccol = vd->crow = 0;
(*vd->emulops->cursor)(vd->emulcookie,
vd->flags & VTFL_CURSORON, 0, 0);
break;
default:
break;
}
}

void
wsemul_vt100_reset(struct wsemul_vt100_emuldata *edp)
{
struct vt100base_data *vd = &edp->bd;
int i;

edp->state = VT100_EMUL_STATE_NORMAL;
vd->flags = VTFL_DECAWM | VTFL_CURSORON;
vd->bkgdattr = vd->curattr = vd->defattr;
vd->attrflags = vd->msgattrs.default_attrs;
vd->fgcol = vd->msgattrs.default_fg;
vd->bgcol = vd->msgattrs.default_bg;
vd->scrreg_startrow = 0;
vd->scrreg_nrows = vd->nrows;
if (vd->tabs) {
memset(vd->tabs, 0, vd->ncols);
for (i = 8; i < vd->ncols; i += 8)
vd->tabs[i] = 1;
}
vd->dcspos = 0;
vd->dcstype = 0;
edp->chartab_G[0] = 0;
edp->chartab_G[1] = edp->nrctab; /* ??? */
edp->chartab_G[2] = edp->isolatin1tab;
edp->chartab_G[3] = edp->isolatin1tab;
edp->chartab0 = 0;
edp->chartab1 = 2;
edp->sschartab = 0;
}

/*
* now all the state machine bits
*/

/*
* New line (including autowrap), index (IND).
*
* Move the cursor to the next line if possible. If the cursor is at
* the bottom of the scroll area, then scroll it up. If the cursor is
* at the bottom of the screen then don't move it down.
*/
static void
wsemul_vt100_nextline(struct vt100base_data *vd)
{

if (ROWS_BELOW(vd) == 0) {
/* Bottom of the scroll region. */
wsemul_vt100_scrollup(vd, 1);
} else {
if ((vd->crow+1) < vd->nrows)
/* Cursor not at the bottom of the screen. */
vd->crow++;
CHECK_DW(vd);
}
}

/*
* Reverse index (RI).
*
* Inverse of wsemul_vt100_nextline. Move up, scroll down.
*/
static void
wsemul_vt100_prevline(struct vt100base_data *vd)
{

if (ROWS_ABOVE(vd) == 0) {
/* Top of the scroll region. */
wsemul_vt100_scrolldown(vd, 1);
} else {
if (vd->crow > 0)
/* Cursor not at the top of the screen. */
vd->crow--;
CHECK_DW(vd);
}
}

static void
wsemul_vt100_output_normal(struct wsemul_vt100_emuldata *edp, u_char c,
int kernel)
{
struct vt100base_data *vd = &edp->bd;
u_int *ct, dc;

if ((vd->flags & (VTFL_LASTCHAR | VTFL_DECAWM)) ==
(VTFL_LASTCHAR | VTFL_DECAWM)) {
wsemul_vt100_nextline(vd);
vd->ccol = 0;
vd->flags &= ~VTFL_LASTCHAR;
}

if (c & 0x80) {
c &= 0x7f;
ct = edp->chartab_G[edp->chartab1];
} else {
if (edp->sschartab) {
ct = edp->chartab_G[edp->sschartab];
edp->sschartab = 0;
} else
ct = edp->chartab_G[edp->chartab0];
}
dc = (ct ? ct[c] : c);

if ((vd->flags & VTFL_INSERTMODE) && COLS_LEFT(vd))
COPYCOLS(vd, vd->ccol, vd->ccol + 1, COLS_LEFT(vd));

(*vd->emulops->putchar)(vd->emulcookie, vd->crow,
vd->ccol << vd->dw, dc,
kernel ? edp->kernattr : vd->curattr);

if (COLS_LEFT(vd))
vd->ccol++;
else
vd->flags |= VTFL_LASTCHAR;
}

static void
wsemul_vt100_output_c0c1(struct wsemul_vt100_emuldata *edp, u_char c,
int kernel)
{
struct vt100base_data *vd = &edp->bd;
u_int n;

switch (c) {
case ASCII_NUL:
default:
/* ignore */
break;
case ASCII_BEL:
if (edp->state == VT100_EMUL_STATE_STRING) {
/* acts as an equivalent to the ``ESC \'' string end */
wsemul_vt100_handle_dcs(vd);
edp->state = VT100_EMUL_STATE_NORMAL;
} else {
wsdisplay_emulbell(vd->cbcookie);
}
break;
case ASCII_BS:
if (vd->ccol > 0) {
vd->ccol--;
vd->flags &= ~VTFL_LASTCHAR;
}
break;
case ASCII_CR:
vd->ccol = 0;
vd->flags &= ~VTFL_LASTCHAR;
break;
case ASCII_HT:
if (vd->tabs) {
if (!COLS_LEFT(vd))
break;
for (n = vd->ccol + 1; n < NCOLS(vd) - 1; n++)
if (vd->tabs[n])
break;
} else {
n = vd->ccol + uimin(8 - (vd->ccol & 7), COLS_LEFT(vd));
}
vd->ccol = n;
break;
case ASCII_SO: /* LS1 */
edp->chartab0 = 1;
break;
case ASCII_SI: /* LS0 */
edp->chartab0 = 0;
break;
case ASCII_ESC:
if (kernel) {
printf("%s: ESC in kernel output ignored\n", __func__);
break; /* ignore the ESC */
}

if (edp->state == VT100_EMUL_STATE_STRING) {
/* might be a string end */
edp->state = VT100_EMUL_STATE_STRING_ESC;
} else {
/* XXX cancel current escape sequence */
edp->state = VT100_EMUL_STATE_ESC;
}
break;
#if 0
case CSI: /* 8-bit */
/* XXX cancel current escape sequence */
edp->nargs = 0;
memset(edp->args, 0, sizeof (edp->args));
edp->modif1 = edp->modif2 = '\0';
edp->state = VT100_EMUL_STATE_CSI;
break;
case DCS: /* 8-bit */
/* XXX cancel current escape sequence */
edp->nargs = 0;
memset(edp->args, 0, sizeof (edp->args));
edp->state = VT100_EMUL_STATE_DCS;
break;
case ST: /* string end 8-bit */
/* XXX only in VT100_EMUL_STATE_STRING */
wsemul_vt100_handle_dcs(vd);
edp->state = VT100_EMUL_STATE_NORMAL;
break;
#endif
case ASCII_LF:
case ASCII_VT:
case ASCII_FF:
wsemul_vt100_nextline(vd);
break;
}
}

static u_int
wsemul_vt100_output_esc(struct wsemul_vt100_emuldata *edp, u_char c)
{
struct vt100base_data *vd = &edp->bd;
int i;

switch (c) {
case '[': /* CSI */
vd->nargs = 0;
memset(vd->args, 0, sizeof (vd->args));
vd->modif1 = vd->modif2 = '\0';
return VT100_EMUL_STATE_CSI;
case '7': /* DECSC */
vd->flags |= VTFL_SAVEDCURS;
edp->savedcursor_row = vd->crow;
edp->savedcursor_col = vd->ccol;
edp->savedattr = vd->curattr;
edp->savedbkgdattr = vd->bkgdattr;
edp->savedattrflags = vd->attrflags;
edp->savedfgcol = vd->fgcol;
edp->savedbgcol = vd->bgcol;
for (i = 0; i < 4; i++)
edp->savedchartab_G[i] = edp->chartab_G[i];
edp->savedchartab0 = edp->chartab0;
edp->savedchartab1 = edp->chartab1;
break;
case '8': /* DECRC */
if ((vd->flags & VTFL_SAVEDCURS) == 0)
break;
vd->crow = edp->savedcursor_row;
vd->ccol = edp->savedcursor_col;
vd->curattr = edp->savedattr;
vd->bkgdattr = edp->savedbkgdattr;
vd->attrflags = edp->savedattrflags;
vd->fgcol = edp->savedfgcol;
vd->bgcol = edp->savedbgcol;
for (i = 0; i < 4; i++)
edp->chartab_G[i] = edp->savedchartab_G[i];
edp->chartab0 = edp->savedchartab0;
edp->chartab1 = edp->savedchartab1;
break;
case '=': /* DECKPAM application mode */
vd->flags |= VTFL_APPLKEYPAD;
break;
case '>': /* DECKPNM numeric mode */
vd->flags &= ~VTFL_APPLKEYPAD;
break;
case 'E': /* NEL */
vd->ccol = 0;
/* FALLTHRU */
case 'D': /* IND */
wsemul_vt100_nextline(vd);
break;
case 'H': /* HTS */
KASSERT(vd->tabs != 0);
vd->tabs[vd->ccol] = 1;
break;
case '~': /* LS1R */
edp->chartab1 = 1;
break;
case 'n': /* LS2 */
edp->chartab0 = 2;
break;
case '}': /* LS2R */
edp->chartab1 = 2;
break;
case 'o': /* LS3 */
edp->chartab0 = 3;
break;
case '|': /* LS3R */
edp->chartab1 = 3;
break;
case 'N': /* SS2 */
edp->sschartab = 2;
break;
case 'O': /* SS3 */
edp->sschartab = 3;
break;
case 'M': /* RI */
wsemul_vt100_prevline(vd);
break;
case 'P': /* DCS */
vd->nargs = 0;
memset(vd->args, 0, sizeof (vd->args));
return VT100_EMUL_STATE_DCS;
case 'c': /* RIS */
wsemul_vt100_reset(edp);
wsemul_vt100_ed(vd, 2);
vd->ccol = vd->crow = 0;
break;
case '(': case ')': case '*': case '+': /* SCS */
edp->designating = c - '(';
return VT100_EMUL_STATE_SCS94;
case '-': case '.': case '/': /* SCS */
edp->designating = c - '-' + 1;
return VT100_EMUL_STATE_SCS96;
case '#':
return VT100_EMUL_STATE_ESC_HASH;
case ' ': /* 7/8 bit */
return VT100_EMUL_STATE_ESC_SPC;
case ']': /* OSC operating system command */
case '^': /* PM privacy message */
case '_': /* APC application program command */
/* ignored */
return VT100_EMUL_STATE_STRING;
case '<': /* exit VT52 mode - ignored */
break;
default:
#ifdef VT100_PRINTUNKNOWN
printf("%s: ESC%c unknown\n", __func__, c);
#endif
break;
}
return VT100_EMUL_STATE_NORMAL;
}

static u_int
wsemul_vt100_output_scs94(struct wsemul_vt100_emuldata *edp, u_char c)
{
switch (c) {
case '%': /* probably DEC supplemental graphic */
return VT100_EMUL_STATE_SCS94_PERCENT;
case 'A': /* british / national */
edp->chartab_G[edp->designating] = edp->nrctab;
break;
case 'B': /* ASCII */
edp->chartab_G[edp->designating] = 0;
break;
case '<': /* user preferred supplemental */
/* XXX not really "user" preferred */
edp->chartab_G[edp->designating] = edp->isolatin1tab;
break;
case '0': /* DEC special graphic */
edp->chartab_G[edp->designating] = edp->decgraphtab;
break;
case '>': /* DEC tech */
edp->chartab_G[edp->designating] = edp->dectechtab;
break;
default:
#ifdef VT100_PRINTUNKNOWN
printf("%s: ESC%c%c unknown\n", __func__,
edp->designating + '(', c);
#endif
break;
}
return VT100_EMUL_STATE_NORMAL;
}

static u_int
wsemul_vt100_output_scs94_percent(struct wsemul_vt100_emuldata *edp, u_char c)
{
switch (c) {
case '5': /* DEC supplemental graphic */
/* XXX there are differences */
edp->chartab_G[edp->designating] = edp->isolatin1tab;
break;
default:
#ifdef VT100_PRINTUNKNOWN
printf("%s: ESC%c%%%c unknown\n",
__func__, edp->designating + '(', c);
#endif
break;
}
return VT100_EMUL_STATE_NORMAL;
}

static u_int
wsemul_vt100_output_scs96(struct wsemul_vt100_emuldata *edp, u_char c)
{
int nrc;

switch (c) {
case '%': /* probably portuguese */
return VT100_EMUL_STATE_SCS96_PERCENT;
case 'A': /* ISO-latin-1 supplemental */
edp->chartab_G[edp->designating] = edp->isolatin1tab;
break;
case '4': /* dutch */
nrc = 1;
goto setnrc;
case '5': case 'C': /* finnish */
nrc = 2;
goto setnrc;
case 'R': /* french */
nrc = 3;
goto setnrc;
case 'Q': /* french canadian */
nrc = 4;
goto setnrc;
case 'K': /* german */
nrc = 5;
goto setnrc;
case 'Y': /* italian */
nrc = 6;
goto setnrc;
case 'E': case '6': /* norwegian / danish */
nrc = 7;
goto setnrc;
case 'Z': /* spanish */
nrc = 9;
goto setnrc;
case '7': case 'H': /* swedish */
nrc = 10;
goto setnrc;
case '=': /* swiss */
nrc = 11;
setnrc:
vt100_setnrc(edp, nrc); /* what table ??? */
break;
default:
#ifdef VT100_PRINTUNKNOWN
printf("%s: ESC%c%c unknown\n",
__func__, edp->designating + '-' - 1, c);
#endif
break;
}
return VT100_EMUL_STATE_NORMAL;
}

static u_int
wsemul_vt100_output_scs96_percent(struct wsemul_vt100_emuldata *edp, u_char c)
{
switch (c) {
case '6': /* portuguese */
vt100_setnrc(edp, 8);
break;
default:
#ifdef VT100_PRINTUNKNOWN
printf("%s: ESC%c%%%c unknown\n",
__func__, edp->designating + '-', c);
#endif
break;
}
return VT100_EMUL_STATE_NORMAL;
}

static u_int
wsemul_vt100_output_esc_spc(struct wsemul_vt100_emuldata *edp,
u_char c)
{
switch (c) {
case 'F': /* 7-bit controls */
case 'G': /* 8-bit controls */
#ifdef VT100_PRINTNOTIMPL
printf("%s: ESC<SPC>%c ignored\n", __func__, c);
#endif
break;
default:
#ifdef VT100_PRINTUNKNOWN
printf("%s: ESC<SPC>%c unknown\n", __func__, c);
#endif
break;
}
return VT100_EMUL_STATE_NORMAL;
}

static u_int
wsemul_vt100_output_string(struct wsemul_vt100_emuldata *edp, u_char c)
{
struct vt100base_data *vd = &edp->bd;

if (vd->dcstype && vd->dcspos < DCS_MAXLEN)
vd->dcsarg[vd->dcspos++] = c;
return VT100_EMUL_STATE_STRING;
}

static u_int
wsemul_vt100_output_string_esc(struct wsemul_vt100_emuldata *edp, u_char c)
{
struct vt100base_data *vd = &edp->bd;

if (c == '\\') { /* ST complete */
wsemul_vt100_handle_dcs(vd);
return VT100_EMUL_STATE_NORMAL;
} else
return VT100_EMUL_STATE_STRING;
}

static u_int
wsemul_vt100_output_dcs(struct wsemul_vt100_emuldata *edp, u_char c)
{
struct vt100base_data *vd = &edp->bd;

switch (c) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
/* argument digit */
if (vd->nargs > VT100_EMUL_NARGS - 1)
break;
vd->args[vd->nargs] = (vd->args[vd->nargs] * 10) +
(c - '0');
break;
default:
vd->nargs++;
if (vd->nargs > VT100_EMUL_NARGS) {
#ifdef VT100_DEBUG
printf("%s: too many arguments\n", __func__);
#endif
vd->nargs = VT100_EMUL_NARGS;
}
if (c == ';') /* argument terminator */
break;
switch (c) {
case '$':
return VT100_EMUL_STATE_DCS_DOLLAR;
case '{': /* DECDLD soft charset */
case '!': /* DECRQUPSS user preferred supplemental set */
/* 'u' must follow - need another state */
case '|': /* DECUDK program F6..F20 */
#ifdef VT100_PRINTNOTIMPL
printf("%s: DCS%c ignored\n", __func__, c);
#endif
break;
default:
#ifdef VT100_PRINTUNKNOWN
printf("%s: DCS%c (%d, %d) unknown\n",
__func__, c, ARG(vd, 0), ARG(vd, 1));
#endif
break;
}
return VT100_EMUL_STATE_STRING;
}

return VT100_EMUL_STATE_DCS;
}

static u_int
wsemul_vt100_output_dcs_dollar(struct wsemul_vt100_emuldata *edp, u_char c)
{
struct vt100base_data *vd = &edp->bd;

switch (c) {
case 'p': /* DECRSTS terminal state restore */
case 'q': /* DECRQSS control function request */
#ifdef VT100_PRINTNOTIMPL
printf("%s: DCS$%c ignored\n", __func__, c);
#endif
break;
case 't': /* DECRSPS restore presentation state */
switch (ARG(vd, 0)) {
case 0: /* error */
break;
case 1: /* cursor information restore */
#ifdef VT100_PRINTNOTIMPL
printf("%s: DCS1$t ignored\n", __func__);
#endif
break;
case 2: /* tab stop restore */
vd->dcspos = 0;
vd->dcstype = DCSTYPE_TABRESTORE;
break;
default:
#ifdef VT100_PRINTUNKNOWN
printf("%s: DCS%d$t unknown\n", __func__, ARG(vd, 0));
#endif
break;
}
break;
default:
#ifdef VT100_PRINTUNKNOWN
printf("%s: DCS$%c (%d, %d) unknown\n",
__func__, c, ARG(vd, 0), ARG(vd, 1));
#endif
break;
}
return VT100_EMUL_STATE_STRING;
}

static u_int
wsemul_vt100_output_esc_hash(struct wsemul_vt100_emuldata *edp, u_char c)
{
struct vt100base_data *vd = &edp->bd;
int i, j;

switch (c) {
case '5': /* DECSWL single width, single height */
if (vd->dw) {
for (i = 0; i < vd->ncols / 2; i++)
(*vd->emulops->copycols)(vd->emulcookie,
vd->crow,
2 * i, i, 1);
(*vd->emulops->erasecols)(vd->emulcookie, vd->crow,
i, vd->ncols - i,
vd->bkgdattr);
vd->dblwid[vd->crow] = 0;
vd->dw = 0;
}
break;
case '6': /* DECDWL double width, single height */
case '3': /* DECDHL double width, double height, top half */
case '4': /* DECDHL double width, double height, bottom half */
if (!vd->dw) {
for (i = vd->ncols / 2 - 1; i >= 0; i--)
(*vd->emulops->copycols)(vd->emulcookie,
vd->crow,
i, 2 * i, 1);
for (i = 0; i < vd->ncols / 2; i++)
(*vd->emulops->erasecols)(vd->emulcookie,
vd->crow,
2 * i + 1, 1,
vd->bkgdattr);
vd->dblwid[vd->crow] = 1;
vd->dw = 1;
if (vd->ccol > (vd->ncols >> 1) - 1)
vd->ccol = (vd->ncols >> 1) - 1;
}
break;
case '8': /* DECALN */
for (i = 0; i < vd->nrows; i++)
for (j = 0; j < vd->ncols; j++)
(*vd->emulops->putchar)(vd->emulcookie, i, j,
'E', vd->curattr);
vd->ccol = 0;
vd->crow = 0;
break;
default:
#ifdef VT100_PRINTUNKNOWN
printf("%s: ESC#%c unknown\n", __func__, c);
#endif
break;
}
return VT100_EMUL_STATE_NORMAL;
}

static u_int
wsemul_vt100_output_csi(struct wsemul_vt100_emuldata *edp, u_char c)
{
struct vt100base_data *vd = &edp->bd;

switch (c) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
/* argument digit */
if (vd->nargs > VT100_EMUL_NARGS - 1)
break;
vd->args[vd->nargs] = (vd->args[vd->nargs] * 10) +
(c - '0');
break;
case '?': /* DEC specific */
case '>': /* DA query */
vd->modif1 = c;
break;
case '!':
case '"':
case '$':
case '&':
vd->modif2 = c;
break;
default: /* end of escape sequence, argument terminator */
vd->nargs++;
if (vd->nargs > VT100_EMUL_NARGS) {
#ifdef VT100_DEBUG
printf("%s: too many arguments\n", __func__);
#endif
vd->nargs = VT100_EMUL_NARGS;
}
if (c == ';') /* argument terminator */
break;
wsemul_vt100_handle_csi(vd, c);
return VT100_EMUL_STATE_NORMAL;
}
return VT100_EMUL_STATE_CSI;
}

static void
wsemul_vt100_output(void *cookie, const u_char *data, u_int count, int kernel)
{
struct wsemul_vt100_emuldata *edp = cookie;
struct vt100base_data *vd = &edp->bd;

#ifdef DIAGNOSTIC
if (kernel && !edp->console)
panic("%s: kernel output, not console", __func__);
#endif

if (vd->flags & VTFL_CURSORON)
(*vd->emulops->cursor)(vd->emulcookie, 0,
vd->crow, vd->ccol << vd->dw);
for (; count > 0; data++, count--) {
if ((*data & 0x7f) < 0x20) {
wsemul_vt100_output_c0c1(edp, *data, kernel);
continue;
}
if (edp->state == VT100_EMUL_STATE_NORMAL || kernel) {
wsemul_vt100_output_normal(edp, *data, kernel);
continue;
}
int state = edp->state - 1;
KASSERT(state < __arraycount(vt100_output));
edp->state = vt100_output[state](edp, *data);
}
if (vd->flags & VTFL_CURSORON)
(*vd->emulops->cursor)(vd->emulcookie, 1,
vd->crow, vd->ccol << vd->dw);
}

#ifdef WSDISPLAY_CUSTOM_OUTPUT
static void
wsemul_vt100_getmsgattrs(void *cookie, struct wsdisplay_msgattrs *ma)
{
struct wsemul_vt100_emuldata *edp = cookie;
struct vt100base_data *vd = &edp->bd;

*ma = vd->msgattrs;
}

static void
wsemul_vt100_setmsgattrs(void *cookie, const struct wsscreen_descr *type,
const struct wsdisplay_msgattrs *ma)
{
int error;
long tmp;
struct wsemul_vt100_emuldata *edp = cookie;
struct vt100base_data *vd = &edp->bd;

vd->msgattrs = *ma;
if (type->capabilities & WSSCREEN_WSCOLORS) {
vd->msgattrs.default_attrs |= WSATTR_WSCOLORS;
vd->msgattrs.kernel_attrs |= WSATTR_WSCOLORS;
} else {
vd->msgattrs.default_bg = vd->msgattrs.kernel_bg = 0;
vd->msgattrs.default_fg = vd->msgattrs.kernel_fg = 0;
}

error = (*vd->emulops->allocattr)(vd->emulcookie,
vd->msgattrs.default_fg,
vd->msgattrs.default_bg,
vd->msgattrs.default_attrs,
&tmp);
#ifndef VT100_DEBUG
__USE(error);
#else
if (error)
printf("%s: failed to allocate attribute for default "
"messages\n", __func__);
else
#endif
{
if (vd->curattr == vd->defattr) {
vd->bkgdattr = vd->curattr = tmp;
vd->attrflags = vd->msgattrs.default_attrs;
vd->bgcol = vd->msgattrs.default_bg;
vd->fgcol = vd->msgattrs.default_fg;
} else {
edp->savedbkgdattr = edp->savedattr = tmp;
edp->savedattrflags = vd->msgattrs.default_attrs;
edp->savedbgcol = vd->msgattrs.default_bg;
edp->savedfgcol = vd->msgattrs.default_fg;
}
if (vd->emulops->replaceattr != NULL)
(*vd->emulops->replaceattr)(vd->emulcookie,
vd->defattr, tmp);
vd->defattr = tmp;
}

error = (*vd->emulops->allocattr)(vd->emulcookie,
vd->msgattrs.kernel_fg,
vd->msgattrs.kernel_bg,
vd->msgattrs.kernel_attrs,
&tmp);
#ifdef VT100_DEBUG
if (error)
printf("%s: failed to allocate attribute for kernel "
"messages\n", __func__);
else
#endif
{
if (vd->emulops->replaceattr != NULL)
(*vd->emulops->replaceattr)(vd->emulcookie,
edp->kernattr, tmp);
edp->kernattr = tmp;
}
}
#endif /* WSDISPLAY_CUSTOM_OUTPUT */