/*-
 * Copyright (c) 1999 FreeBSD(98) Porting Team.
 * 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 as
 *    the first lines of this file unmodified.
 * 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 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 "sc.h"
#include "opt_syscons.h"

#if NSC > 0

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/consio.h>

#include <machine/pc/display.h>

#include <dev/syscons/syscons.h>
#include <dev/syscons/sctermvar.h>

#ifndef SC_DUMB_TERMINAL

#define MAX_ESC_PAR	5

#ifdef KANJI
#define IS_KTYPE_ASCII_or_HANKAKU(A)	(!((A) & 0xee))
#define IS_KTYPE_KANA(A)		((A) & 0x11)
#define KTYPE_MASK_CTRL(A)		((A) &= 0xF0)
#endif /* KANJI */

/* attribute flags */
typedef struct {
	u_short		fg;			/* foreground color */
	u_short		bg;			/* background color */
} color_t;

typedef struct {
	int		flags;
#define SCTERM_BUSY	(1 << 0)
	int		esc;
	int		num_param;
	int		last_param;
	int		param[MAX_ESC_PAR];
	int		saved_xpos;
	int		saved_ypos;

#ifdef KANJI
	u_char		kanji_1st_char;
	u_char		kanji_type;
#define KTYPE_ASCII	0			/* ASCII */
#define KTYPE_KANA	1			/* HANKAKU */
#define KTYPE_JKANA	0x10			/* JIS HANKAKU */
#define KTYPE_7JIS	0x20			/* JIS */
#define KTYPE_SJIS	2			/* Shift JIS */
#define KTYPE_UJIS	4			/* UJIS */
#define KTYPE_SUKANA	3			/* Shift JIS or UJIS HANKAKU */
#define KTYPE_SUJIS	6			/* SHift JIS or UJIS */
#define KTYPE_KANIN	0x80			/* Kanji Invoke sequence */
#define KTYPE_ASCIN	0x40			/* ASCII Invoke sequence */
#endif /* KANJI */

	int		attr_mask;		/* current logical attr mask */
#define NORMAL_ATTR	0x00
#define BLINK_ATTR	0x01
#define BOLD_ATTR	0x02
#define UNDERLINE_ATTR	0x04
#define REVERSE_ATTR	0x08
#define FG_CHANGED	0x10
#define BG_CHANGED	0x20
	int		cur_attr;		/* current hardware attr word */
	color_t		cur_color;		/* current hardware color */
	color_t		std_color;		/* normal hardware color */
	color_t		rev_color;		/* reverse hardware color */
	color_t		dflt_std_color;		/* default normal color */
	color_t		dflt_rev_color;		/* default reverse color */
} term_stat;

static sc_term_init_t	scterm_init;
static sc_term_term_t	scterm_term;
static sc_term_puts_t	scterm_puts;
static sc_term_ioctl_t	scterm_ioctl;
static sc_term_reset_t	scterm_reset;
static sc_term_default_attr_t	scterm_default_attr;
static sc_term_clear_t	scterm_clear;
static sc_term_notify_t	scterm_notify;
static sc_term_input_t	scterm_input;

static sc_term_sw_t sc_term_sc = {
	{ NULL, NULL },
	"sck",				/* emulator name */
	"syscons kanji terminal",	/* description */
	"*",				/* matching renderer, any :-) */
	sizeof(term_stat),		/* softc size */
	0,
	scterm_init,
	scterm_term,
	scterm_puts,
	scterm_ioctl,
	scterm_reset,
	scterm_default_attr,
	scterm_clear,
	scterm_notify,
	scterm_input,
};

SCTERM_MODULE(sc, sc_term_sc);

static term_stat	reserved_term_stat;
static int		default_kanji = UJIS;
static void		scterm_scan_esc(scr_stat *scp, term_stat *tcp,
					u_char c);
static int		mask2attr(term_stat *tcp);
static u_char		iskanji1(u_char mode, u_char c);
static u_char		iskanji2(u_char mode, u_char c);
static u_short		kanji_convert(u_char mode, u_char h, u_char l);

static int
scterm_init(scr_stat *scp, void **softc, int code)
{
	term_stat *tcp;

	if (*softc == NULL) {
		if (reserved_term_stat.flags & SCTERM_BUSY)
			return EINVAL;
		*softc = &reserved_term_stat;
	}
	tcp = *softc;

	switch (code) {
	case SC_TE_COLD_INIT:
		bzero(tcp, sizeof(*tcp));
		tcp->flags = SCTERM_BUSY;
		tcp->esc = 0;
		tcp->saved_xpos = -1;
		tcp->saved_ypos = -1;

#ifdef KANJI
		tcp->kanji_1st_char = 0;
		tcp->kanji_type = KTYPE_ASCII;
#endif

		tcp->attr_mask = NORMAL_ATTR;
		/* XXX */
		tcp->dflt_std_color.fg = SC_NORM_ATTR & 0x0f;
		tcp->dflt_std_color.bg = (SC_NORM_ATTR >> 4) & 0x0f;
		tcp->dflt_rev_color.fg = SC_NORM_REV_ATTR & 0x0f;
		tcp->dflt_rev_color.bg = (SC_NORM_REV_ATTR >> 4) & 0x0f;
		tcp->std_color = tcp->dflt_std_color;
		tcp->rev_color = tcp->dflt_rev_color;
		tcp->cur_color = tcp->std_color;
		tcp->cur_attr = mask2attr(tcp);
		++sc_term_sc.te_refcount;
		break;

	case SC_TE_WARM_INIT:
		tcp->esc = 0;
		tcp->saved_xpos = -1;
		tcp->saved_ypos = -1;
#if 0
		tcp->std_color = tcp->dflt_std_color;
		tcp->rev_color = tcp->dflt_rev_color;
#endif
		tcp->cur_color = tcp->std_color;
		tcp->cur_attr = mask2attr(tcp);
		break;
	}

	return 0;
}

static int
scterm_term(scr_stat *scp, void **softc)
{
	if (*softc == &reserved_term_stat) {
		*softc = NULL;
		bzero(&reserved_term_stat, sizeof(reserved_term_stat));
	}
	--sc_term_sc.te_refcount;
	return 0;
}

static void
scterm_scan_esc(scr_stat *scp, term_stat *tcp, u_char c)
{
	static u_char ansi_col[16] = {
		FG_BLACK,     FG_RED,          FG_GREEN,      FG_BROWN,
		FG_BLUE,      FG_MAGENTA,      FG_CYAN,       FG_LIGHTGREY,
		FG_DARKGREY,  FG_LIGHTRED,     FG_LIGHTGREEN, FG_YELLOW,
		FG_LIGHTBLUE, FG_LIGHTMAGENTA, FG_LIGHTCYAN,  FG_WHITE
	    };
	sc_softc_t *sc;
	int i, n;

    i = n = 0;
    sc = scp->sc; 
    if (tcp->esc == 1) {	/* seen ESC */
	switch (c) {

	case '7':   /* Save cursor position */
	    tcp->saved_xpos = scp->xpos;
	    tcp->saved_ypos = scp->ypos;
	    break;

	case '8':   /* Restore saved cursor position */
	    if (tcp->saved_xpos >= 0 && tcp->saved_ypos >= 0)
		sc_move_cursor(scp, tcp->saved_xpos, tcp->saved_ypos);
	    break;

	case '[':   /* Start ESC [ sequence */
	    tcp->esc = 2;
	    tcp->last_param = -1;
	    for (i = tcp->num_param; i < MAX_ESC_PAR; i++)
		tcp->param[i] = 1;
	    tcp->num_param = 0;
	    return;

#ifdef KANJI
	case '$':	/* Kanji Invoke sequence */
	    tcp->kanji_type = KTYPE_KANIN;
	    return;
#endif

	case 'M':   /* Move cursor up 1 line, scroll if at top */
	    sc_term_up_scroll(scp, 1, sc->scr_map[0x20], tcp->cur_attr, 0, 0);
	    break;
#if notyet
	case 'Q':
	    tcp->esc = 4;
	    return;
#endif
	case 'c':   /* Clear screen & home */
	    sc_clear_screen(scp);
	    break;

	case '(':   /* iso-2022: designate 94 character set to G0 */
#ifdef KANJI
	    tcp->kanji_type = KTYPE_ASCIN;
#else
	    tcp->esc = 5;
#endif
	    return;
	}
    }
    else if (tcp->esc == 2) {	/* seen ESC [ */
	if (c >= '0' && c <= '9') {
	    if (tcp->num_param < MAX_ESC_PAR) {
		if (tcp->last_param != tcp->num_param) {
		    tcp->last_param = tcp->num_param;
		    tcp->param[tcp->num_param] = 0;
		} else {
		    tcp->param[tcp->num_param] *= 10;
		}
		tcp->param[tcp->num_param] += c - '0';
		return;
	    }
	}
	tcp->num_param = tcp->last_param + 1;
	switch (c) {

	case ';':
	    if (tcp->num_param < MAX_ESC_PAR)
		return;
	    break;

	case '=':
	    tcp->esc = 3;
	    tcp->last_param = -1;
	    for (i = tcp->num_param; i < MAX_ESC_PAR; i++)
		tcp->param[i] = 1;
	    tcp->num_param = 0;
	    return;

	case 'A':   /* up n rows */
	    sc_term_up(scp, tcp->param[0], 0);
	    break;

	case 'B':   /* down n rows */
	    sc_term_down(scp, tcp->param[0], 0);
	    break;

	case 'C':   /* right n columns */
	    sc_term_right(scp, tcp->param[0]);
	    break;

	case 'D':   /* left n columns */
	    sc_term_left(scp, tcp->param[0]);
	    break;

	case 'E':   /* cursor to start of line n lines down */
	    n = tcp->param[0]; if (n < 1) n = 1;
	    sc_move_cursor(scp, 0, scp->ypos + n);
	    break;

	case 'F':   /* cursor to start of line n lines up */
	    n = tcp->param[0]; if (n < 1) n = 1;
	    sc_move_cursor(scp, 0, scp->ypos - n);
	    break;

	case 'f':   /* Cursor move */
	case 'H':
	    if (tcp->num_param == 0)
		sc_move_cursor(scp, 0, 0);
	    else if (tcp->num_param == 2)
		sc_move_cursor(scp, tcp->param[1] - 1, tcp->param[0] - 1);
	    break;

	case 'J':   /* Clear all or part of display */
	    if (tcp->num_param == 0)
		n = 0;
	    else
		n = tcp->param[0];
	    sc_term_clr_eos(scp, n, sc->scr_map[0x20], tcp->cur_attr);
	    break;

	case 'K':   /* Clear all or part of line */
	    if (tcp->num_param == 0)
		n = 0;
	    else
		n = tcp->param[0];
	    sc_term_clr_eol(scp, n, sc->scr_map[0x20], tcp->cur_attr);
	    break;

	case 'L':   /* Insert n lines */
	    sc_term_ins_line(scp, scp->ypos, tcp->param[0],
			     sc->scr_map[0x20], tcp->cur_attr, 0);
	    break;

	case 'M':   /* Delete n lines */
	    sc_term_del_line(scp, scp->ypos, tcp->param[0],
			     sc->scr_map[0x20], tcp->cur_attr, 0);
	    break;

	case 'P':   /* Delete n chars */
	    sc_term_del_char(scp, tcp->param[0],
			     sc->scr_map[0x20], tcp->cur_attr);
	    break;

	case '@':   /* Insert n chars */
	    sc_term_ins_char(scp, tcp->param[0],
			     sc->scr_map[0x20], tcp->cur_attr);
	    break;

	case 'S':   /* scroll up n lines */
	    sc_term_del_line(scp, 0, tcp->param[0],
			     sc->scr_map[0x20], tcp->cur_attr, 0);
	    break;

	case 'T':   /* scroll down n lines */
	    sc_term_ins_line(scp, 0, tcp->param[0],
			     sc->scr_map[0x20], tcp->cur_attr, 0);
	    break;

	case 'X':   /* erase n characters in line */
	    n = tcp->param[0]; if (n < 1)  n = 1;
	    if (n > scp->xsize - scp->xpos)
		n = scp->xsize - scp->xpos;
	    sc_vtb_erase(&scp->vtb, scp->cursor_pos, n,
			 sc->scr_map[0x20], tcp->cur_attr);
	    mark_for_update(scp, scp->cursor_pos);
	    mark_for_update(scp, scp->cursor_pos + n - 1);
	    break;

	case 'Z':   /* move n tabs backwards */
	    sc_term_backtab(scp, tcp->param[0]);
	    break;

	case '`':   /* move cursor to column n */
	    sc_term_col(scp, tcp->param[0]);
	    break;

	case 'a':   /* move cursor n columns to the right */
	    sc_term_right(scp, tcp->param[0]);
	    break;

	case 'd':   /* move cursor to row n */
	    sc_term_row(scp, tcp->param[0]);
	    break;

	case 'e':   /* move cursor n rows down */
	    sc_term_down(scp, tcp->param[0], 0);
	    break;

	case 'm':   /* change attribute */
	    if (tcp->num_param == 0) {
		tcp->attr_mask = NORMAL_ATTR;
		tcp->cur_color = tcp->std_color;
		tcp->cur_attr = mask2attr(tcp);
		break;
	    }
	    for (i = 0; i < tcp->num_param; i++) {
		switch (n = tcp->param[i]) {
		case 0: /* back to normal */
		    tcp->attr_mask = NORMAL_ATTR;
		    tcp->cur_color = tcp->std_color;
		    tcp->cur_attr = mask2attr(tcp);
		    break;
		case 1: /* bold */
		    tcp->attr_mask |= BOLD_ATTR;
		    tcp->cur_attr = mask2attr(tcp);
		    break;
		case 4: /* underline */
		    tcp->attr_mask |= UNDERLINE_ATTR;
		    tcp->cur_attr = mask2attr(tcp);
		    break;
		case 5: /* blink */
		    tcp->attr_mask |= BLINK_ATTR;
		    tcp->cur_attr = mask2attr(tcp);
		    break;
		case 7: /* reverse video */
		    tcp->attr_mask |= REVERSE_ATTR;
		    tcp->cur_attr = mask2attr(tcp);
		    break;
		case 30: case 31: /* set fg color */
		case 32: case 33: case 34:
		case 35: case 36: case 37:
		    tcp->attr_mask |= FG_CHANGED;
		    tcp->cur_color.fg = ansi_col[n - 30];
		    tcp->cur_attr = mask2attr(tcp);
		    break;
		case 40: case 41: /* set bg color */
		case 42: case 43: case 44:
		case 45: case 46: case 47:
		    tcp->attr_mask |= BG_CHANGED;
		    tcp->cur_color.bg = ansi_col[n - 40];
		    tcp->cur_attr = mask2attr(tcp);
		    break;
		}
	    }
	    break;

	case 's':   /* Save cursor position */
	    tcp->saved_xpos = scp->xpos;
	    tcp->saved_ypos = scp->ypos;
	    break;

	case 'u':   /* Restore saved cursor position */
	    if (tcp->saved_xpos >= 0 && tcp->saved_ypos >= 0)
		sc_move_cursor(scp, tcp->saved_xpos, tcp->saved_ypos);
	    break;

	case 'x':
	    if (tcp->num_param == 0)
		n = 0;
	    else
		n = tcp->param[0];
	    switch (n) {
	    case 0:     /* reset attributes */
		tcp->attr_mask = NORMAL_ATTR;
		tcp->cur_color = tcp->std_color = tcp->dflt_std_color;
		tcp->rev_color = tcp->dflt_rev_color;
		tcp->cur_attr = mask2attr(tcp);
		break;
	    case 1:     /* set ansi background */
		tcp->attr_mask &= ~BG_CHANGED;
		tcp->cur_color.bg = tcp->std_color.bg =
		    ansi_col[tcp->param[1] & 0x0f];
		tcp->cur_attr = mask2attr(tcp);
		break;
	    case 2:     /* set ansi foreground */
		tcp->attr_mask &= ~FG_CHANGED;
		tcp->cur_color.fg = tcp->std_color.fg =
		    ansi_col[tcp->param[1] & 0x0f];
		tcp->cur_attr = mask2attr(tcp);
		break;
	    case 3:     /* set ansi attribute directly */
		tcp->attr_mask &= ~(FG_CHANGED | BG_CHANGED);
		tcp->cur_color.fg = tcp->std_color.fg =
		    tcp->param[1] & 0x0f;
		tcp->cur_color.bg = tcp->std_color.bg =
		    (tcp->param[1] >> 4) & 0x0f;
		tcp->cur_attr = mask2attr(tcp);
		break;
	    case 5:     /* set ansi reverse video background */
		tcp->rev_color.bg = ansi_col[tcp->param[1] & 0x0f];
		tcp->cur_attr = mask2attr(tcp);
		break;
	    case 6:     /* set ansi reverse video foreground */
		tcp->rev_color.fg = ansi_col[tcp->param[1] & 0x0f];
		tcp->cur_attr = mask2attr(tcp);
		break;
	    case 7:     /* set ansi reverse video directly */
		tcp->rev_color.fg = tcp->param[1] & 0x0f;
		tcp->rev_color.bg = (tcp->param[1] >> 4) & 0x0f;
		tcp->cur_attr = mask2attr(tcp);
		break;
	    }
	    break;

	case 'z':   /* switch to (virtual) console n */
	    if (tcp->num_param == 1)
		sc_switch_scr(sc, tcp->param[0]);
	    break;
	}
    }
    else if (tcp->esc == 3) {	/* seen ESC [0-9]+ = */
	if (c >= '0' && c <= '9') {
	    if (tcp->num_param < MAX_ESC_PAR) {
		if (tcp->last_param != tcp->num_param) {
		    tcp->last_param = tcp->num_param;
		    tcp->param[tcp->num_param] = 0;
		} else {
		    tcp->param[tcp->num_param] *= 10;
		}
		tcp->param[tcp->num_param] += c - '0';
		return;
	    }
	}
	tcp->num_param = tcp->last_param + 1;
	switch (c) {

	case ';':
	    if (tcp->num_param < MAX_ESC_PAR)
		return;
	    break;

	case 'A':   /* set display border color */
	    if (tcp->num_param == 1) {
		scp->border=tcp->param[0] & 0xff;
		if (scp == sc->cur_scp)
		    sc_set_border(scp, scp->border);
            }
	    break;

	case 'B':   /* set bell pitch and duration */
	    if (tcp->num_param == 2) {
		scp->bell_pitch = tcp->param[0];
		scp->bell_duration = tcp->param[1];
	    }
	    break;

	case 'C':   /* set cursor type & shape */
	    i = spltty();
	    if (!ISGRAPHSC(sc->cur_scp))
		sc_remove_cursor_image(sc->cur_scp);
	    if (tcp->num_param == 1) {
		if (tcp->param[0] & 0x01)
		    sc->flags |= SC_BLINK_CURSOR;
		else
		    sc->flags &= ~SC_BLINK_CURSOR;
		if (tcp->param[0] & 0x02) 
		    sc->flags |= SC_CHAR_CURSOR;
		else
		    sc->flags &= ~SC_CHAR_CURSOR;
	    } else if (tcp->num_param == 2) {
		sc->cursor_base = scp->font_size 
					- (tcp->param[1] & 0x1F) - 1;
		sc->cursor_height = (tcp->param[1] & 0x1F) 
					- (tcp->param[0] & 0x1F) + 1;
	    }
	    /* 
	     * The cursor shape is global property; all virtual consoles
	     * are affected. Update the cursor in the current console...
	     */
	    if (!ISGRAPHSC(sc->cur_scp)) {
		sc_set_cursor_image(sc->cur_scp);
		sc_draw_cursor_image(sc->cur_scp);
	    }
	    splx(i);
	    break;

	case 'F':   /* set ansi foreground */
	    if (tcp->num_param == 1) {
		tcp->attr_mask &= ~FG_CHANGED;
		tcp->cur_color.fg = tcp->std_color.fg = tcp->param[0] & 0x0f;
		tcp->cur_attr = mask2attr(tcp);
	    }
	    break;

	case 'G':   /* set ansi background */
	    if (tcp->num_param == 1) {
		tcp->attr_mask &= ~BG_CHANGED;
		tcp->cur_color.bg = tcp->std_color.bg = tcp->param[0] & 0x0f;
		tcp->cur_attr = mask2attr(tcp);
	    }
	    break;

	case 'H':   /* set ansi reverse video foreground */
	    if (tcp->num_param == 1) {
		tcp->rev_color.fg = tcp->param[0] & 0x0f;
		tcp->cur_attr = mask2attr(tcp);
	    }
	    break;

	case 'I':   /* set ansi reverse video background */
	    if (tcp->num_param == 1) {
		tcp->rev_color.bg = tcp->param[0] & 0x0f;
		tcp->cur_attr = mask2attr(tcp);
	    }
	    break;
	}
    }
#if notyet
    else if (tcp->esc == 4) {	/* seen ESC Q */
	/* to be filled */
    }
#endif
    else if (tcp->esc == 5) {	/* seen ESC ( */
	switch (c) {
	case 'B':   /* iso-2022: desginate ASCII into G0 */
	    break;
	/* other items to be filled */
	default:
	    break;
	}
    }
    tcp->esc = 0;
}

static void
scterm_puts(scr_stat *scp, u_char *buf, int len)
{
	term_stat *tcp = scp->ts;
	u_char *ptr = buf;
#ifdef KANJI
	u_short kanji_code;
#endif

outloop:
    scp->sc->write_in_progress++;

    if (tcp->esc) {
	scterm_scan_esc(scp, tcp, *ptr++);
	len--;
    }
    else if (PRINTABLE(*ptr)) {     /* Print only printables */
	vm_offset_t p;
	u_char *map;
	int attr;
	int i;
#ifdef KANJI
	u_char c;
#else
 	int cnt;
#endif

	p = sc_vtb_pointer(&scp->vtb, scp->cursor_pos);
	map = scp->sc->scr_map;
	attr = tcp->cur_attr;

#ifdef KANJI
	c = *ptr;
	if (tcp->kanji_1st_char == 0) {
	    tcp->kanji_type = iskanji1(tcp->kanji_type, c);
	    if (!IS_KTYPE_ASCII_or_HANKAKU(tcp->kanji_type)) {
		/* not Ascii & not HANKAKU */
		tcp->kanji_1st_char = c;
		goto kanji_end;
	    } else {
		tcp->kanji_1st_char = 0;
	    }
	} else {
	    if ((tcp->kanji_type = iskanji2(tcp->kanji_type, c)) & 0xee) {
		/* print kanji on TEXT VRAM */
		kanji_code = kanji_convert(tcp->kanji_type, c, tcp->kanji_1st_char);
		mark_for_update(scp, scp->cursor_pos);
		for (i=0; i<2; i++){
		    /* *cursor_pos = (kanji_code | (i*0x80)); */
		    p = sc_vtb_putchar(&scp->vtb, p,
		   		       kanji_code | ((i == 0) ? 0x00 : 0x80),
				       attr);
		    ++scp->cursor_pos;
		    if (++scp->xpos >= scp->xsize) {
			scp->xpos = 0;
			scp->ypos++;
		    }
		}
		mark_for_update(scp, scp->cursor_pos - 1);
		KTYPE_MASK_CTRL(tcp->kanji_type);
		tcp->kanji_1st_char = 0;
		goto kanji_end;
	    } else {
		tcp->kanji_1st_char = 0;
	    }
	}				
	if (IS_KTYPE_KANA(tcp->kanji_type))
		c |= 0x80;
	KTYPE_MASK_CTRL(tcp->kanji_type);
	sc_vtb_putchar(&scp->vtb, p, map[c], attr);
	mark_for_update(scp, scp->cursor_pos);
	mark_for_update(scp, scp->cursor_pos);
	++scp->cursor_pos;
	++scp->xpos;
kanji_end:
	++ptr;
	--len;
#else /* !KANJI */
	cnt = imin(len, scp->xsize - scp->xpos);
	i = cnt;
	do {
	    /*
	     * gcc-2.6.3 generates poor (un)sign extension code.  Casting the
	     * pointers in the following to volatile should have no effect,
	     * but in fact speeds up this inner loop from 26 to 18 cycles
	     * (+ cache misses) on i486's.
	     */
#define	UCVP(ucp)	((u_char volatile *)(ucp))
	    p = sc_vtb_putchar(&scp->vtb, p, UCVP(map)[*UCVP(ptr)], attr);
	    ++ptr;
	    --i;
	} while (i > 0 && PRINTABLE(*ptr));

	len -= cnt - i;
	mark_for_update(scp, scp->cursor_pos);
	scp->cursor_pos += cnt - i;
	mark_for_update(scp, scp->cursor_pos - 1);
	scp->xpos += cnt - i;
#endif /* !KANJI */

	if (scp->xpos >= scp->xsize) {
	    scp->xpos = 0;
	    scp->ypos++;
	}
    }
    else  {
	switch (*ptr) {
	case 0x07:
	    sc_bell(scp, scp->bell_pitch, scp->bell_duration);
	    break;

	case 0x08:      /* non-destructive backspace */
	    if (scp->cursor_pos > 0) {
		mark_for_update(scp, scp->cursor_pos);
		scp->cursor_pos--;
		mark_for_update(scp, scp->cursor_pos);
		if (scp->xpos > 0)
		    scp->xpos--;
		else {
		    scp->xpos += scp->xsize - 1;
		    scp->ypos--;
		}
	    }
	    break;

	case 0x09:  /* non-destructive tab */
	    mark_for_update(scp, scp->cursor_pos);
	    scp->cursor_pos += (8 - scp->xpos % 8u);
	    scp->xpos += (8 - scp->xpos % 8u);
	    if (scp->xpos >= scp->xsize) {
	        scp->xpos = 0;
	        scp->ypos++;
		scp->cursor_pos = scp->xsize * scp->ypos;
	    }
	    mark_for_update(scp, scp->cursor_pos);
	    break;

	case 0x0a:  /* newline, same pos */
	    mark_for_update(scp, scp->cursor_pos);
	    scp->cursor_pos += scp->xsize;
	    mark_for_update(scp, scp->cursor_pos);
	    scp->ypos++;
	    break;

	case 0x0c:  /* form feed, clears screen */
	    sc_clear_screen(scp);
	    break;

	case 0x0d:  /* return, return to pos 0 */
	    mark_for_update(scp, scp->cursor_pos);
	    scp->cursor_pos -= scp->xpos;
	    mark_for_update(scp, scp->cursor_pos);
	    scp->xpos = 0;
	    break;

#ifdef PC98
	case 0x0e:		/* ^N */
	    tcp->kanji_type = KTYPE_JKANA;
	    tcp->esc = 0;
	    tcp->kanji_1st_char = 0;
	    break;

	case 0x0f:		/* ^O */
	    tcp->kanji_type = KTYPE_ASCII;
	    tcp->esc = 0;
	    tcp->kanji_1st_char = 0;
	    break;
#endif /* PC98 */

	case 0x1b:  /* start escape sequence */
	    tcp->esc = 1;
	    tcp->num_param = 0;
	    break;
	}
	ptr++; len--;
    }

    sc_term_gen_scroll(scp, scp->sc->scr_map[0x20], tcp->cur_attr);

    scp->sc->write_in_progress--;
    if (len)
	goto outloop;
}

static int
scterm_ioctl(scr_stat *scp, struct tty *tp, u_long cmd, caddr_t data,
	     int flag, struct proc *p)
{
	term_stat *tcp = scp->ts;
	vid_info_t *vi;

	switch (cmd) {
	case GIO_ATTR:      	/* get current attributes */
		/* FIXME: */
		*(int*)data = (tcp->cur_attr >> 8) & 0xff;
		return 0;
	case CONS_GETINFO:  	/* get current (virtual) console info */
		vi = (vid_info_t *)data;
		if (vi->size != sizeof(struct vid_info))
			return EINVAL;
		vi->mv_norm.fore = tcp->std_color.fg;
		vi->mv_norm.back = tcp->std_color.bg;
		vi->mv_rev.fore = tcp->rev_color.fg;
		vi->mv_rev.back = tcp->rev_color.bg;
		/*
		 * The other fields are filled by the upper routine. XXX
		 */
		return ENOIOCTL;
	}
	return ENOIOCTL;
}

static int
scterm_reset(scr_stat *scp, int code)
{
	/* FIXME */
	return 0;
}

static void
scterm_default_attr(scr_stat *scp, int color, int rev_color)
{
	term_stat *tcp = scp->ts;

	tcp->dflt_std_color.fg = color & 0x0f;
	tcp->dflt_std_color.bg = (color >> 4) & 0x0f;
	tcp->dflt_rev_color.fg = rev_color & 0x0f;
	tcp->dflt_rev_color.bg = (rev_color >> 4) & 0x0f;
	tcp->std_color = tcp->dflt_std_color;
	tcp->rev_color = tcp->dflt_rev_color;
	tcp->cur_color = tcp->std_color;
	tcp->cur_attr = mask2attr(tcp);
}

static void
scterm_clear(scr_stat *scp)
{
	term_stat *tcp = scp->ts;

	sc_move_cursor(scp, 0, 0);
	sc_vtb_clear(&scp->vtb, scp->sc->scr_map[0x20], tcp->cur_attr);
	mark_all(scp);
}

static void
scterm_notify(scr_stat *scp, int event)
{
	switch (event) {
	case SC_TE_NOTIFY_VTSWITCH_IN:
		break;
	case SC_TE_NOTIFY_VTSWITCH_OUT:
		break;
	}
}

static int
scterm_input(scr_stat *scp, int c, struct tty *tp)
{
	return FALSE;
}

/*
 * Calculate hardware attributes word using logical attributes mask and
 * hardware colors
 */

/* FIXME */
static int
mask2attr(term_stat *tcp)
{
	int attr, mask = tcp->attr_mask;

	if (mask & REVERSE_ATTR) {
		attr = ((mask & FG_CHANGED) ?
			tcp->cur_color.bg : tcp->rev_color.fg) |
			(((mask & BG_CHANGED) ?
			tcp->cur_color.fg : tcp->rev_color.bg) << 4);
	} else
		attr = tcp->cur_color.fg | (tcp->cur_color.bg << 4);

	/* XXX: underline mapping for Hercules adapter can be better */
	if (mask & (BOLD_ATTR | UNDERLINE_ATTR))
		attr ^= 0x08;
	if (mask & BLINK_ATTR)
		attr ^= 0x80;

	return (attr << 8);
}

#ifdef KANJI
static u_char
iskanji1(u_char mode, u_char c)
{
    if ((mode == KTYPE_7JIS) && (c >= 0x21) && (c <= 0x7e)) {
	/* JIS */
	default_kanji = UJIS;
	return KTYPE_7JIS;
    }

    if ((mode == KTYPE_JKANA) && (c >= 0x21) && (c <= 0x5f)) {
	/* JIS HANKAKU */
	default_kanji = UJIS;
	return KTYPE_JKANA;
    }

#if 1
    if ((c >= 0xa1) && (c <= 0xdf) && (default_kanji == UJIS)) {
	/* UJIS */
	return KTYPE_UJIS;
    }
#endif

    if ((c >= 0x81) && (c <= 0x9f) && (c != 0x8e)) {
	/* SJIS */
	default_kanji = SJIS;
	return KTYPE_SJIS;
    }

    if ((c >= 0xa1) && (c <= 0xdf) && (default_kanji == SJIS)) {
	/* SJIS HANKAKU */
	return KTYPE_KANA;
    }

#if 0
    if ((c >= 0xa1) && (c <= 0xdf) && (default_kanji == UJIS)) {
	/* UJIS */
	return KTYPE_UJIS;
    }
#endif

    if ((c >= 0xf0) && (c <= 0xfe)) {
	/* UJIS */
	default_kanji = UJIS;
	return KTYPE_UJIS;
    }

    if ((c >= 0xe0) && (c <= 0xef)) {
	/* SJIS or UJIS */
	return KTYPE_SUJIS;
    }

    if (c == 0x8e) {
	/* SJIS or UJIS HANKAKU */
	return KTYPE_SUKANA;
    }

    return KTYPE_ASCII;
}

static u_char
iskanji2(u_char mode, u_char c)
{
    switch (mode) {
    case KTYPE_7JIS:
	if ((c >= 0x21) && (c <= 0x7e)) {
	    /* JIS */
	    return KTYPE_7JIS;
	}
	break;
    case KTYPE_SJIS:
	if ((c >= 0x40) && (c <= 0xfc) && (c != 0x7f)) {
	    /* SJIS */
	    return KTYPE_SJIS;
	}
	break;
    case KTYPE_UJIS:
	if ((c >= 0xa1) && (c <= 0xfe)) {
	    /* UJIS */
	    return KTYPE_UJIS;
	}
	break;
    case KTYPE_SUKANA:
	if ((c >= 0xa1) && (c <= 0xdf) && (default_kanji == UJIS)) {
	    /* UJIS HANKAKU */
	    return KTYPE_KANA;
	}
	if ((c >= 0x40) && (c <= 0xfc) && (c != 0x7f)) {
	    /* SJIS */
	    default_kanji = SJIS;
	    return KTYPE_SJIS;
	}
	break;
    case KTYPE_SUJIS:
	if ((c >= 0x40) && (c <= 0xa0) && (c != 0x7f)) {
	    /* SJIS */
	    default_kanji = SJIS;
	    return KTYPE_SJIS;
	}
	if ((c == 0xfd) || (c == 0xfe)) {
	    /* UJIS */
	    default_kanji = UJIS;
	    return KTYPE_UJIS;
	}
	if ((c >= 0xa1) && (c <= 0xfc)) {
	    if (default_kanji == SJIS)
		return KTYPE_SJIS;
	    if (default_kanji == UJIS)
		return KTYPE_UJIS;
	}
	break;
    }
    return KTYPE_ASCII;
}

/*
 * JIS X0208-83 keisen conversion table
 */
static u_short keiConv[32] = {
	0x240c, 0x260c, 0x300c, 0x340c, 0x3c0c, 0x380c, 0x400c, 0x500c,
	0x480c, 0x580c, 0x600c, 0x250c, 0x270c, 0x330c, 0x370c, 0x3f0c,
	0x3b0c, 0x470c, 0x570c, 0x4f0c, 0x5f0c, 0x6f0c, 0x440c, 0x530c,
	0x4c0c, 0x5b0c, 0x630c, 0x410c, 0x540c, 0x490c, 0x5c0c, 0x660c
};

static u_short
kanji_convert(u_char mode, u_char h, u_char l)
{
    u_short tmp, high, low, c;
    high = (u_short) h;
    low  = (u_short) l;

    switch (mode) {
    case KTYPE_SJIS: /* SHIFT JIS */
	if (low >= 0xe0) {
	    low -= 0x40;
	}
	low = (low - 0x81) * 2 + 0x21;
	if (high > 0x7f) {
	    high--;
	}
	if (high > 0x9d) {
	    low++;
	    high -= 0x9e - 0x21;
	} else {
	    high -= 0x40 - 0x21;
	}
	high &= 0x7F;
	low  &= 0x7F;
	tmp = ((high << 8) | low) - 0x20;
	break;
    case KTYPE_7JIS: /* JIS */
    case KTYPE_UJIS: /* UJIS */
	high &= 0x7F;
	low &= 0x7F;
	tmp = ((high << 8) | low) - 0x20;
	break;
    default:
	tmp = 0;
	break;
    }

    /* keisen */
    c = ((tmp & 0xff) << 8) | (tmp >> 8);
    /* 0x2821 .. 0x2840 */
    if (0x0821 <= c && c <= 0x0840)
    tmp = keiConv[c - 0x0821];

    return (tmp);
}
#endif /* KANJI */

#endif /* SC_DUMB_TERMINAL */

#endif /* NSC > 0 */