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wfst_aux.h
/*************************************************************************/
/* */
/* Centre for Speech Technology Research */
/* University of Edinburgh, UK */
/* Copyright (c) 1997 */
/* All Rights Reserved. */
/* */
/* Permission is hereby granted, free of charge, to use and distribute */
/* this software and its documentation without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of this work, and to */
/* permit persons to whom this work is furnished to do so, subject to */
/* the following conditions: */
/* 1. The code must retain the above copyright notice, this list of */
/* conditions and the following disclaimer. */
/* 2. Any modifications must be clearly marked as such. */
/* 3. Original authors' names are not deleted. */
/* 4. The authors' names are not used to endorse or promote products */
/* derived from this software without specific prior written */
/* permission. */
/* */
/* THE UNIVERSITY OF EDINBURGH AND THE CONTRIBUTORS TO THIS WORK */
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
/* SHALL THE UNIVERSITY OF EDINBURGH NOR THE CONTRIBUTORS BE LIABLE */
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
/* THIS SOFTWARE. */
/* */
/*************************************************************************/
/* Author : Alan W Black */
/* Date : November 1997 */
/*-----------------------------------------------------------------------*/
/* */
/* Some internal classes for Weighted Finite State Transducers */
/* */
/*=======================================================================*/
#ifndef __WFST_AUX_H__
#define __WFST_AUX_H__
// Used in minimization
class wfst_marks {
private:
int p_x;
char **p_mark_table; // triangular matrix
char val(int p,int q)
{ if (p < q) return p_mark_table[q][p];
else return p_mark_table[p][q]; }
void set_val(int p,int q,char e)
{ if (p < q) p_mark_table[q][p] = e;
else p_mark_table[p][q] = e; }
public:
wfst_marks(int x);
~wfst_marks();
int distinguished(int p, int q) { return val(p,q) == 'd'; }
int undistinguished(int p, int q)
{ return val(p,q) == 'u'; }
void distinguish(int p, int q) { set_val(p,q,'d'); }
void undistinguish(int p, int q) { set_val(p,q,'u'); }
void find_state_map(EST_IVector &state_map,int &num_new_states);
};
typedef EST_TKVL<int,EST_IList> wfst_assumes;
void mark_undistinguished(wfst_marks &marks,wfst_assumes &assumptions);
int equivalent_to(int y,int z,wfst_assumes &assumptions);
void add_assumption(int y,int z,wfst_assumes &assumptions);
#endif
EST_TKVL
Definition EST_TKVL.h:72
wfst_marks
Definition wfst_aux.h:45