lib/libcurses/keymap.h

   1 /*   $NetBSD: keymap.h,v 1.4 2012/04/21 12:27:28 roy Exp $ */
   2
   3 /*
   4  * Copyright (c) 2005 The NetBSD Foundation Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from code donated to the NetBSD Foundation
   8  * by Ruibiao Qiu <ruibiao@arl.wustl.edu,ruibiao@gmail.com>.
   9  *
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the NetBSD Foundation nor the names of its
  20  *    contributors may be used to endorse or promote products derived
  21  *    from this software without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
  24  * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  25  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  26  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #ifndef _KEYMAP_H_
  38 #define _KEYMAP_H_
  39
  40 #include <sys/cdefs.h>
  41 #ifndef lint
  42 __RCSID("$NetBSD: keymap.h,v 1.4 2012/04/21 12:27:28 roy Exp $");
  43 #endif                          /* not lint */
  44
  45 /* keymap related stuff */
  46 /*
  47  * moved here by Ruibiao Qiu
  48  * because it is needed by both getch() and get_wch()
  49  *
  50  * Keyboard input handler.  Do this by snarfing
  51  * all the info we can out of the terminfo entry for TERM and putting it
  52  * into a set of keymaps.  A keymap is an array the size of all the possible
  53  * single characters we can get, the contents of the array is a structure
  54  * that contains the type of entry this character is (i.e. part/end of a
  55  * multi-char sequence or a plain char) and either a pointer which will point
  56  * to another keymap (in the case of a multi-char sequence) OR the data value
  57  * that this key should return.
  58  *
  59  */
  60
  61 /* private data structures for holding the key definitions */
  62 typedef struct key_entry key_entry_t;
  63
  64 struct key_entry {
  65         short   type;           /* type of key this is */
  66         bool    enable;         /* true if the key is active */
  67         union {
  68                 keymap_t *next; /* next keymap is key is multi-key sequence */
  69                 wchar_t   symbol;       /* key symbol if key is a leaf entry */
  70         } value;
  71 };
  72 /* Types of key structures we can have */
  73 #define KEYMAP_MULTI  1         /* part of a multi char sequence */
  74 #define KEYMAP_LEAF   2         /* key has a symbol associated with it, either
  75                                  * it is the end of a multi-char sequence or a
  76                                  * single char key that generates a symbol */
  77
  78 /* allocate this many key_entry structs at once to speed start up must
  79  * be a power of 2.
  80  */
  81 #define KEYMAP_ALLOC_CHUNK 4
  82
  83 /* The max number of different chars we can receive */
  84 #define MAX_CHAR 256
  85
  86 /*
  87  * Unused mapping flag.
  88  */
  89 #define MAPPING_UNUSED (0 - MAX_CHAR) /* never been used */
  90
  91 struct keymap {
  92         int     count;         /* count of number of key structs allocated */
  93         short   mapping[MAX_CHAR]; /* mapping of key to allocated structs */
  94         key_entry_t **key;     /* dynamic array of keys */
  95 };
  96
  97 #define INC_POINTER(ptr)  do {  \
  98         (ptr)++;                \
  99         (ptr) %= INBUF_SZ;      \
 100 } while(/*CONSTCOND*/0)
 101
 102 #define INKEY_NORM         0 /* no key backlog to process */
 103 #define INKEY_ASSEMBLING   1 /* assembling a multi-key sequence */
 104 #define INKEY_BACKOUT      2 /* recovering from an unrecognised key */
 105 #define INKEY_TIMEOUT      3 /* multi-key sequence timeout */
 106 #ifdef HAVE_WCHAR
 107 #define INKEY_WCASSEMBLING 4 /* assembling a wide char sequence */
 108 #endif /* HAVE_WCHAR */
 109
 110 /* The terminfo data we are interested in and the symbols they map to */
 111 struct tcdata {
 112         int code;               /* code of the terminfo entry */
 113         wchar_t symbol;         /* the symbol associated with it */
 114 };
 115
 116 #endif /* _KEYMAP_H_ */