#ifndef keytab_h#define keytab_h/* * Copyright (c) 2000, 2001 by Martin C. Shepherd. *  * All rights reserved. *  * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, and/or sell copies of the Software, and to permit persons * to whom the Software is furnished to do so, provided that the above * copyright notice(s) and this permission notice appear in all copies of * the Software and that both the above copyright notice(s) and this * permission notice appear in supporting documentation. *  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT * OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR * HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. *  * Except as contained in this notice, the name of a copyright holder * shall not be used in advertising or otherwise to promote the sale, use * or other dealings in this Software without prior written authorization * of the copyright holder. */#include "libtecla.h"#include "hash.h"#include "strngmem.h"/*-----------------------------------------------------------------------* * This module defines a binary-search symbol table of key-bindings.     * *-----------------------------------------------------------------------*//* * All key-binding functions are defined as follows. * * Input: *  gl    GetLine *  The resource object of this library. *  count     int    A positive repeat count specified by the user, *                   or 1. Action functions should ignore this if *                   repeating the action multiple times isn't *                   appropriate. * Output: *  return    int    0 - OK. *                   1 - Error. */#define KT_KEY_FN(fn) int (fn)(GetLine *gl, int count)typedef KT_KEY_FN(KtKeyFn);/* * Define an entry of a key-binding binary symbol table. */typedef struct {  char *keyseq;         /* The key sequence that triggers the macro */  int nc;               /* The number of characters in keyseq[] */  KtKeyFn *user_fn;     /* A user specified binding (or 0 if none) */  KtKeyFn *term_fn;     /* A terminal-specific binding (or 0 if none) */  KtKeyFn *norm_fn;     /* The default binding (or 0 if none) */  KtKeyFn *keyfn;       /* The function to execute when this key sequence */                        /*  is seen. This is the function above which has */                        /*  the highest priority. */} KeySym;/* * When allocating or reallocating the key-binding table, how * many entries should be added? */#define KT_TABLE_INC 100/* * Define the size of the hash table that is used to associate action * names with action functions. This should be a prime number. */#define KT_HASH_SIZE 113/* * Define a binary-symbol-table object. */typedef struct {  int size;           /* The allocated dimension of table[] */  int nkey;           /* The current number of members in the table */  KeySym *table;      /* The table of lexically sorted key sequences */  HashTable *actions; /* The hash table of actions */  StringMem *smem;    /* Memory for allocating strings */} KeyTab;KeyTab *_new_KeyTab(void);KeyTab *_del_KeyTab(KeyTab *kt);/* * Enumerate the possible sources of key-bindings. */typedef enum {  KTB_USER,         /* This is a binding being set by the user */  KTB_TERM,         /* This is a binding taken from the terminal settings */  KTB_NORM          /* This is the default binding set by the library */} KtBinder;int _kt_set_keybinding(KeyTab *kt, KtBinder binder,		       const char *keyseq, const char *action);int _kt_set_keyfn(KeyTab *kt, KtBinder binder, const char *keyseq,		  KtKeyFn *keyfn);int _kt_set_action(KeyTab *kt, const char *action, KtKeyFn *fn);typedef enum {  KT_EXACT_MATCH,   /* An exact match was found */  KT_AMBIG_MATCH,   /* An ambiguous match was found */  KT_NO_MATCH,      /* No match was found */  KT_BAD_MATCH      /* An error occurred while searching */} KtKeyMatch;KtKeyMatch _kt_lookup_keybinding(KeyTab *kt, const char *binary_keyseq,				 int nc, int *first,int *last);/* * Remove all key bindings that came from a specified source. */void _kt_clear_bindings(KeyTab *kt, KtBinder binder);/* * When installing an array of keybings each binding is defined by * an element of the following type: */typedef struct {  const char *keyseq;   /* The sequence of keys that trigger this binding */  const char *action;   /* The name of the action function that is triggered */} KtKeyBinding;/* * Merge an array of bindings with existing bindings. */int _kt_add_bindings(KeyTab *kt, KtBinder binder, const KtKeyBinding *bindings,		     unsigned n);/* * Convert a keybinding string into a uniq binary representation. */int _kt_parse_keybinding_string(const char *keyseq,				char *binary, int *nc);#endif