fbcd1b6eac
This means we can finally do things like VT100 box drawing when using Syscons (8-bit characters). As far as I know, the only remaining issue is the absense of proper escape sequences for special keyboard characters (cursor, F1 to F12, etc) and xterm emulation should be ready for general use. Enabling xterm would have the following advantages: - Easier possible migration to Unicode. cons25 termcap entries are very 8-bit centric. They use things like CP437 characters for box drawing, etc. - Better support for SSH'ing to other operating systems/devices. Most switches use VT100-style admin interfaces. - Reduced bandwidth, because applications can now use things like scrolling regions. - You can finally use applications like dtach(1) on both the console and inside an xterm.
109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
/*-
|
|
* Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org>
|
|
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
static void
|
|
teken_scs_set(teken_t *t, unsigned int g, teken_scs_t *ts)
|
|
{
|
|
|
|
t->t_scs[g] = ts;
|
|
}
|
|
|
|
static void
|
|
teken_scs_switch(teken_t *t, unsigned int g)
|
|
{
|
|
|
|
t->t_curscs = g;
|
|
}
|
|
|
|
static void
|
|
teken_scs_restore(teken_t *t)
|
|
{
|
|
|
|
t->t_scs[t->t_curscs] = t->t_saved_curscs;
|
|
}
|
|
|
|
static void
|
|
teken_scs_save(teken_t *t)
|
|
{
|
|
|
|
t->t_saved_curscs = t->t_scs[t->t_curscs];
|
|
}
|
|
|
|
static teken_char_t
|
|
teken_scs_process(teken_t *t, teken_char_t c)
|
|
{
|
|
|
|
return (t->t_scs[t->t_curscs](t, c));
|
|
}
|
|
|
|
/* Unicode points for VT100 box drawing. */
|
|
static const uint16_t teken_boxdrawing_unicode[31] = {
|
|
0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1,
|
|
0x2424, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba,
|
|
0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c,
|
|
0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7
|
|
};
|
|
|
|
/* CP437 points for VT100 box drawing. */
|
|
static const uint8_t teken_boxdrawing_8bit[31] = {
|
|
0x04, 0xb1, 0x48, 0x46, 0x43, 0x4c, 0xf8, 0xf1,
|
|
0x4e, 0x56, 0xd9, 0xbf, 0xda, 0xc0, 0xc5, 0xc4,
|
|
0xc4, 0xc4, 0xc4, 0xc4, 0xc3, 0xb4, 0xc1, 0xc2,
|
|
0xb3, 0xf3, 0xf2, 0xe3, 0xd8, 0x9c, 0xfa,
|
|
};
|
|
|
|
static teken_char_t
|
|
teken_scs_special_graphics(teken_t *t, teken_char_t c)
|
|
{
|
|
|
|
/* Box drawing. */
|
|
if (c >= '`' && c <= '~')
|
|
return (t->t_stateflags & TS_8BIT ?
|
|
teken_boxdrawing_8bit[c - '`'] :
|
|
teken_boxdrawing_unicode[c - '`']);
|
|
return (c);
|
|
}
|
|
|
|
static teken_char_t
|
|
teken_scs_uk_national(teken_t *t, teken_char_t c)
|
|
{
|
|
|
|
/* Pound sign. */
|
|
if (c == '#')
|
|
return (t->t_stateflags & TS_8BIT ? 0x9c : 0xa3);
|
|
return (c);
|
|
}
|
|
|
|
static teken_char_t
|
|
teken_scs_us_ascii(teken_t *t, teken_char_t c)
|
|
{
|
|
|
|
/* No processing. */
|
|
return (c);
|
|
}
|