/**************************************************************************/
/*                            File: grammar.h                             */
/**************************************************************************/
/* Project: Continuous Speech Recognition Search Algorithms               */
/* Author: Neeraj Deshmukh, Aravind Ganapathiraju                         */
/* Class: EE 8993 Spring 1996                        Date: March 27, 1996 */
/**************************************************************************/
 
/*========================================================================
  This file declares the grammar class that outlines the language model
  structure used in the speech recognizer
  ========================================================================*/
 
/*------------------------------------------------------------------------
  make sure definitions are only made once
  ------------------------------------------------------------------------*/
#ifndef __ISIP_GRAMMAR
#define __ISIP_GRAMMAR
 
/*------------------------------------------------------------------------
  system and ISIP include files
  ------------------------------------------------------------------------*/
#include "gram_state.h"

/*------------------------------------------------------------------------
  forward declaration of classes
  ------------------------------------------------------------------------*/
class Linked_List;
class Trans_State;
class Gram_State;
class Grammar;

/*========================================================================
  Grammar
  class definition for the language model grammar
  ========================================================================*/
class Grammar {
  
  // members
  //
protected:
  
  Gram_State *states_ptr;

  // methods
  //
public:

  /*------------------------
    constructor & destructor
    ------------------------*/
  Grammar ();
  ~Grammar ();

  /*---------------------
    input / output method
    ---------------------*/
  void       read_grammar_cc (FILE *gram_file_ptr);
  Gram_State *get_states_ptr_cc ();
  Gram_State *get_start_state_cc ();
  Gram_State *add_state_cc (String state_name);
  float_8    get_trans_score_cc (String from_state_name, String to_state_name);
  void       print_grammar_cc (FILE *outFile);
};

#endif