teken_scs.h revision 187562 
1/*-
2 * Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/dev/syscons/teken/teken_scs.h 187562 2009-01-21 19:43:10Z ed $
27 */
28
29static void
30teken_scs_set(teken_t *t, unsigned int g, teken_scs_t *ts)
31{
32
33	t->t_scs[g] = ts;
34}
35
36static void
37teken_scs_switch(teken_t *t, unsigned int g)
38{
39
40	t->t_curscs = g;
41}
42
43static void
44teken_scs_restore(teken_t *t)
45{
46
47	t->t_scs[t->t_curscs] = t->t_saved_curscs;
48}
49
50static void
51teken_scs_save(teken_t *t)
52{
53
54	t->t_saved_curscs = t->t_scs[t->t_curscs];
55}
56
57static teken_char_t
58teken_scs_process(teken_t *t, teken_char_t c)
59{
60
61	return (t->t_scs[t->t_curscs](c));
62}
63
64/* Unicode points for VT100 box drawing. */
65static const uint16_t teken_boxdrawing[31] = {
66    0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1,
67    0x2424, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba,
68    0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c,
69    0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7
70};
71
72static teken_char_t
73teken_scs_special_graphics(teken_char_t c)
74{
75
76	/* Box drawing. */
77	if (c >= '`' && c <= '~')
78		return (teken_boxdrawing[c - '`']);
79	return (c);
80}
81
82static teken_char_t
83teken_scs_uk_national(teken_char_t c)
84{
85
86	/* Pound sign. */
87	if (c == '#')
88		return (0xa3);
89	return (c);
90}
91
92static teken_char_t
93teken_scs_us_ascii(teken_char_t c)
94{
95
96	/* No processing. */
97	return (c);
98}
99