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

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * 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 inline teken_char_t
    teken_scs_process(const 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
    };
    
    /* ASCII points for VT100 box drawing. */
    static const uint8_t teken_boxdrawing_8bit[31] = {
        '?', '?', 'H', 'F', 'C', 'L', '?', '?',
        'N', 'V', '+', '+', '+', '+', '+', '-',
        '-', '-', '-', '-', '+', '+', '+', '+',
        '|', '?', '?', '?', '?', '?', '?',
    };
    
    static teken_char_t
    teken_scs_special_graphics(const 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(const 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(const teken_t *t, teken_char_t c)
    {
    
            /* No processing. */
            (void)t;
            return (c);
    }

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