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86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
/*
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Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
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This file is part of libzmq, the ZeroMQ core engine in C++.
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libzmq is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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As a special exception, the Contributors give you permission to link
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this library with independent modules to produce an executable,
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regardless of the license terms of these independent modules, and to
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copy and distribute the resulting executable under terms of your choice,
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provided that you also meet, for each linked independent module, the
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terms and conditions of the license of that module. An independent
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module is a module which is not derived from or based on this library.
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If you modify this library, you must extend this exception to your
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version of the library.
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libzmq is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ZMQ_TRIE_HPP_INCLUDED__
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#define __ZMQ_TRIE_HPP_INCLUDED__
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#include <stddef.h>
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#include "macros.hpp"
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#include "stdint.hpp"
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namespace zmq
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{
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class trie_t
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{
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public:
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trie_t ();
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~trie_t ();
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// Add key to the trie. Returns true if this is a new item in the trie
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// rather than a duplicate.
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bool add (unsigned char *prefix_, size_t size_);
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// Remove key from the trie. Returns true if the item is actually
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// removed from the trie.
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bool rm (unsigned char *prefix_, size_t size_);
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// Check whether particular key is in the trie.
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bool check (const unsigned char *data_, size_t size_) const;
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// Apply the function supplied to each subscription in the trie.
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void apply (void (*func_) (unsigned char *data_, size_t size_, void *arg_),
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void *arg_);
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private:
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void apply_helper (unsigned char **buff_,
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size_t buffsize_,
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size_t maxbuffsize_,
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void (*func_) (unsigned char *data_,
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size_t size_,
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void *arg_),
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void *arg_) const;
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bool is_redundant () const;
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uint32_t _refcnt;
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unsigned char _min;
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unsigned short _count;
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unsigned short _live_nodes;
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union
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{
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class trie_t *node;
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class trie_t **table;
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} _next;
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ZMQ_NON_COPYABLE_NOR_MOVABLE (trie_t)
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};
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}
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#endif
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