1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29static inline teken_char_t
30teken_scs_process(const teken_t *t, teken_char_t c)
31{
32
33	return (t->t_scs[t->t_curscs](t, c));
34}
35
36/* Unicode points for VT100 box drawing. */
37static const uint16_t teken_boxdrawing_unicode[31] = {
38    0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1,
39    0x2424, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba,
40    0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c,
41    0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7
42};
43
44/* ASCII points for VT100 box drawing. */
45static const uint8_t teken_boxdrawing_8bit[31] = {
46    '?', '?', 'H', 'F', 'C', 'L', '?', '?',
47    'N', 'V', '+', '+', '+', '+', '+', '-',
48    '-', '-', '-', '-', '+', '+', '+', '+',
49    '|', '?', '?', '?', '?', '?', '?',
50};
51
52static teken_char_t
53teken_scs_special_graphics(const teken_t *t, teken_char_t c)
54{
55
56	/* Box drawing. */
57	if (c >= '`' && c <= '~')
58		return (t->t_stateflags & TS_8BIT ?
59		    teken_boxdrawing_8bit[c - '`'] :
60		    teken_boxdrawing_unicode[c - '`']);
61	return (c);
62}
63
64static teken_char_t
65teken_scs_uk_national(const teken_t *t, teken_char_t c)
66{
67
68	/* Pound sign. */
69	if (c == '#')
70		return (t->t_stateflags & TS_8BIT ? 0x9c : 0xa3);
71	return (c);
72}
73
74static teken_char_t
75teken_scs_us_ascii(const teken_t *t, teken_char_t c)
76{
77
78	/* No processing. */
79	(void)t;
80	return (c);
81}
82