The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/teken/teken_scs.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    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  * $FreeBSD$
   29  */
   30 
   31 static inline teken_char_t
   32 teken_scs_process(const teken_t *t, teken_char_t c)
   33 {
   34 
   35         return (t->t_scs[t->t_curscs](t, c));
   36 }
   37 
   38 /* Unicode points for VT100 box drawing. */
   39 static const uint16_t teken_boxdrawing_unicode[31] = {
   40     0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1,
   41     0x2424, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba,
   42     0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c,
   43     0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7
   44 };
   45 
   46 /* ASCII points for VT100 box drawing. */
   47 static const uint8_t teken_boxdrawing_8bit[31] = {
   48     '?', '?', 'H', 'F', 'C', 'L', '?', '?',
   49     'N', 'V', '+', '+', '+', '+', '+', '-',
   50     '-', '-', '-', '-', '+', '+', '+', '+',
   51     '|', '?', '?', '?', '?', '?', '?',
   52 };
   53 
   54 static teken_char_t
   55 teken_scs_special_graphics(const teken_t *t, teken_char_t c)
   56 {
   57 
   58         /* Box drawing. */
   59         if (c >= '`' && c <= '~')
   60                 return (t->t_stateflags & TS_8BIT ?
   61                     teken_boxdrawing_8bit[c - '`'] :
   62                     teken_boxdrawing_unicode[c - '`']);
   63         return (c);
   64 }
   65 
   66 static teken_char_t
   67 teken_scs_uk_national(const teken_t *t, teken_char_t c)
   68 {
   69 
   70         /* Pound sign. */
   71         if (c == '#')
   72                 return (t->t_stateflags & TS_8BIT ? 0x9c : 0xa3);
   73         return (c);
   74 }
   75 
   76 static teken_char_t
   77 teken_scs_us_ascii(const teken_t *t, teken_char_t c)
   78 {
   79 
   80         /* No processing. */
   81         (void)t;
   82         return (c);
   83 }

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