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/*
Copyright (c) 2009-2012 250bpm s.r.o.
Copyright (c) 2007-2009 iMatix Corporation
Copyright (c) 2011-2012 Spotify AB
Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
This file is part of Crossroads I/O project.
Crossroads I/O is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
Crossroads is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __XS_TRIE_HPP_INCLUDED__
#define __XS_TRIE_HPP_INCLUDED__
#include <stddef.h>
#include "stdint.hpp"
namespace xs
{
class trie_t
{
public:
trie_t ();
~trie_t ();
// Add key to the trie. Returns true if this is a new item in the trie
// rather than a duplicate.
bool add (unsigned char *prefix_, size_t size_);
// Remove key from the trie. Returns true if the item is actually
// removed from the trie.
bool rm (unsigned char *prefix_, size_t size_);
// Check whether particular key is in the trie.
bool check (unsigned char *data_, size_t size_);
// Apply the function supplied to each subscription in the trie.
void apply (void (*func_) (unsigned char *data_, size_t size_,
void *arg_), void *arg_);
private:
void apply_helper (
unsigned char **buff_, size_t buffsize_, size_t maxbuffsize_,
void (*func_) (unsigned char *data_, size_t size_, void *arg_),
void *arg_);
bool is_redundant () const;
uint32_t refcnt;
unsigned char min;
unsigned short count;
unsigned short live_nodes;
union {
class trie_t *node;
class trie_t **table;
} next;
trie_t (const trie_t&);
const trie_t &operator = (const trie_t&);
};
}
#endif
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