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// $Id: ReorderingConstraint.h 2451 2009-08-04 13:46:24Z hieuhoang1972 $
// vim:tabstop=2
/***********************************************************************
Moses - factored phrase-based language decoder
Copyright (C) 2008 University of Edinburgh
This library 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 2.1 of the License, or (at your option) any later version.
This library 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 library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
***********************************************************************/
#pragma once
//#include <malloc.h>
#include <limits>
#include <vector>
#include <iostream>
#include <cstring>
#include <cmath>
#include "TypeDef.h"
#include "Word.h"
#include "Phrase.h"
namespace Moses
{
class InputType;
/** vector of boolean used to represent whether a word has been translated or not */
class ReorderingConstraint
{
friend std::ostream& operator<<(std::ostream& out, const ReorderingConstraint& reorderingConstraint);
protected:
// const size_t m_size; /**< number of words in sentence */
size_t m_size; /**< number of words in sentence */
bool *m_wall; /**< flag for each word if it is a wall */
bool *m_localWall; /**< flag for each word if it is a local wall */
std::vector< std::vector< size_t > > m_zone; /** zones that limit reordering */
bool m_active; /**< flag indicating, if there are any active constraints */
public:
//! create ReorderingConstraint of length size and initialise to zero
ReorderingConstraint() :m_wall(NULL),m_localWall(NULL),m_active(false) {}
//! destructer
~ReorderingConstraint()
{
if (m_wall != NULL) free(m_wall);
if (m_localWall != NULL) free(m_localWall);
}
//! allocate memory for memory for a sentence of a given size
void InitializeWalls(size_t size);
//! changes walls in zones into local walls
void FinalizeWalls();
//! set value at a particular position
void SetWall( size_t pos, bool value );
//! whether a word has been translated at a particular position
bool GetWall(size_t pos) const { return m_wall[pos]; }
//! whether a word has been translated at a particular position
bool GetLocalWall(size_t pos) const { return m_localWall[pos]; }
//! set a zone
void SetZone( size_t startPos, size_t endPos );
//! returns the vector of zones
std::vector< std::vector< size_t > > & GetZones() { return m_zone; }
//! set the reordering walls based on punctuation in the sentence
void SetMonotoneAtPunctuation( const Phrase & sentence );
//! check if all constraints are fulfilled -> all find
bool Check( const WordsBitmap &bitmap, size_t start, size_t end ) const;
//! checks if reordering constraints will be enforced
bool IsActive() const { return m_active; }
};
}
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