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// Copyright (C) 2003--2004 Darren Moore (moore@idiap.ch)
//
// This file is part of Torch 3.1.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. The name of the author may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef LMINTERIORLEVELWORDENTRY_INC
#define LMINTERIORLEVELWORDENTRY_INC
#include "general.h"
#include "LMInteriorLevelWordList.h"
#ifdef DEBUG
#include "Vocabulary.h"
#endif
namespace Torch {
typedef struct
{
int word ;
real log_prob ;
} LMWordEntry ;
class LMInteriorLevelWordList ;
/**
This class is used internally within the language model n-gram
data structures. It contains a list of LM probabilities relevant
to the level of the tree structure where it exists, and a link to
the next level of the tree structure.
@author Darren Moore (moore@idiap.ch)
*/
class LMInteriorLevelWordEntry
{
public:
int word ;
real log_bo_weight ;
LMInteriorLevelWordList *next_level ;
int n_entries ;
LMWordEntry *entries ;
/* Constructors / destructor */
LMInteriorLevelWordEntry( int word_ ) ;
virtual ~LMInteriorLevelWordEntry() ;
/* Methods */
void addProbEntry( int list_level , int order , int *words , real prob ) ;
void addBackoffEntry( int list_level , int order , int *words , real bo_wt ) ;
bool getProbWithBackoff( int order , int *prev_words , real *prob ) ;
// Internal function.
real getWordProb( int word ) ;
#ifdef DEBUG
void outputText( Vocabulary *vocab , int *words , int n_words ) ;
#endif
};
}
#endif
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