Alexander Afanasyev
95 lines
2.3 KiB
C++
95 lines
2.3 KiB
C++
/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
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/*
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* Copyright (c) 2012 University of California, Los Angeles
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Zhenkai Zhu <zhenkai@cs.ucla.edu>
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* 卞超轶 Chaoyi Bian <bcy@pku.edu.cn>
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* Alexander Afanasyev <alexander.afanasyev@ucla.edu>
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*/
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#ifndef SYNC_DIFF_STATE_H
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#define SYNC_DIFF_STATE_H
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#include "sync-state.h"
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namespace Sync {
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class DiffState;
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typedef boost::shared_ptr<DiffState> DiffStatePtr;
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typedef boost::shared_ptr<DiffState> DiffStateConstPtr;
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/**
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* @ingroup ccnx
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* @brief Differential SYNC state
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*/
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class DiffState : public State
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{
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public:
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/**
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* @see Default constructor
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*/
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DiffState ();
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virtual ~DiffState ();
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/**
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* @brief Set successor for the diff state
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* @param next successor state
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*/
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void
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setNext (DiffStatePtr next)
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{
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m_next = next;
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}
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// void
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// setDigest (Hash digest);
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// Hash
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// getDigest () const;
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/**
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* @brief Accumulate differences from `this' state to the most current state
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* @returns Accumulated differences from `this' state to the most current state
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*/
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DiffStatePtr
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diff () const;
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/**
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* @brief Combine differences from `this' and `state'
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* @param state Differential state to combine with
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* @return Combined differences
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*
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* In case of collisions, `this' leaf will be replaced with the leaf of `state'
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*/
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DiffState&
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operator += (const DiffState &state);
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// from State
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virtual void
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update (NameInfoConstPtr info, const SeqNo &seq);
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virtual void
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remove (NameInfoConstPtr info);
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private:
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DiffStatePtr m_next;
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// Hash m_digest;
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};
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} // Sync
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#endif // SYNC_DIFF_STATE_H
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