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  * 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  * $FreeBSD$
   27  */
   28 
   29 static inline teken_char_t
   30 teken_scs_process(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. */
   37 static 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. */
   45 static const uint8_t teken_boxdrawing_8bit[31] = {
   46     '?', '?', 'H', 'F', 'C', 'L', '?', '?',
   47     'N', 'V', '+', '+', '+', '+', '+', '-',
   48     '-', '-', '-', '-', '+', '+', '+', '+',
   49     '|', '?', '?', '?', '?', '?', '?',
   50 };
   51 
   52 static teken_char_t
   53 teken_scs_special_graphics(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 
   64 static teken_char_t
   65 teken_scs_uk_national(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 
   74 static teken_char_t
   75 teken_scs_us_ascii(teken_t *t __unused, teken_char_t c)
   76 {
   77 
   78         /* No processing. */
   79         return (c);
   80 }

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