sys/teken/teken_scs.h

   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 }