contrib/texinfo-4/info/infokey.h

   1 /* infokey.h -- Custom keystroke definition support.
   2    $Id: infokey.h,v 1.2 2004/04/11 17:56:45 karl Exp $
   3
   4    Copyright (C) 1999, 2002 Free Software Foundation, Inc.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19
  20    Written by Andrew Bettison <andrewb@zip.com.au>.
  21
  22    This design was derived from the "lesskey" system in less 3.4.0. by
  23    Mark Nudelman.
  24
  25    The following terminology is confusing:
  26         source file = $HOME/.infokey
  27         infokey file = $HOME/.info
  28    Oh, well.
  29  */
  30
  31
  32 /* Default source file, where user writes text definitions to be
  33    compiled to the infokey file.  MS-DOS doesn't allow leading
  34    dots in file names.  */
  35 #ifdef __MSDOS__
  36 #define INFOKEY_SRCFILE         "_infokey"
  37 #else
  38 #define INFOKEY_SRCFILE         ".infokey"
  39 #endif
  40
  41 /* Default "infokey file", where compiled user defs are kept and
  42    read by Info.  MS-DOS doesn't allow leading dots in file names.  */
  43 #ifdef __MSDOS__
  44 #define INFOKEY_FILE            "_info"
  45 #else
  46 #define INFOKEY_FILE            ".info"
  47 #endif
  48
  49 /*
  50 Format of entire infokey file:
  51
  52         4 bytes         magic number S
  53         X bytes         version string
  54         1 byte '\0'     terminator
  55
  56         any number of sections:
  57                 1 byte          section id
  58                 2 bytes         section length (N)
  59                 N bytes         section definitions: format depends on section
  60
  61         4 bytes         magic number E
  62
  63 Format of INFO and EA sections:
  64
  65         1 byte          flag: 1 == suppress default key bindings
  66         Repeat:
  67                 X bytes         key sequence
  68                 1 byte '\0'     terminator
  69                 1 byte          action code (A_xxx)
  70
  71 Format of VAR section:
  72
  73         Repeat:
  74                 X bytes         variable name
  75                 1 byte '\0'     terminator
  76                 Y bytes         value
  77                 1 byte '\0'     terminator
  78
  79 */
  80
  81 #define INFOKEY_NMAGIC          8
  82
  83 #define INFOKEY_MAGIC_S0        '\001'
  84 #define INFOKEY_MAGIC_S1        'I'
  85 #define INFOKEY_MAGIC_S2        'n'
  86 #define INFOKEY_MAGIC_S3        'f'
  87
  88 #define INFOKEY_SECTION_INFO    'i'
  89 #define INFOKEY_SECTION_EA      'e'
  90 #define INFOKEY_SECTION_VAR     'v'
  91
  92 #define INFOKEY_MAGIC_E0        'A'
  93 #define INFOKEY_MAGIC_E1        'l'
  94 #define INFOKEY_MAGIC_E2        'f'
  95 #define INFOKEY_MAGIC_E3        'n'
  96
  97 #define INFOKEY_RADIX           64
  98 #define INFOKEY_MAX_SECTIONLEN  500
  99 #define INFOKEY_MAX_DEFLEN      16
 100
 101 #define A_MAX_COMMAND           120
 102 #define A_INVALID               121
 103
 104 /* Character transformations (independent of info's own) */
 105
 106 #define CONTROL(c)              ((c) & 0x1f)
 107 #define ISCONTROL(c)            (((c) & ~0x1f) == 0)
 108 #define META(c)                 ((c) | 0x80)
 109 #define UNMETA(c)               ((c) & ~0x80)
 110 #define ISMETA(c)               (((c) & 0x80) != 0)
 111
 112 /* Special keys (keys which output different strings on different terminals) */
 113
 114 #define SK_ESCAPE               CONTROL('k')
 115 #define SK_RIGHT_ARROW          1
 116 #define SK_LEFT_ARROW           2
 117 #define SK_UP_ARROW             3
 118 #define SK_DOWN_ARROW           4
 119 #define SK_PAGE_UP              5
 120 #define SK_PAGE_DOWN            6
 121 #define SK_HOME                 7
 122 #define SK_END                  8
 123 #define SK_DELETE               9
 124 #define SK_INSERT               10
 125 #define SK_CTL_LEFT_ARROW       11
 126 #define SK_CTL_RIGHT_ARROW      12
 127 #define SK_CTL_DELETE           13
 128 #define SK_LITERAL              40