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/* */
/* Centre for Speech Technology Research */
/* University of Edinburgh, UK */
/* Copyright (c) 1995,1996 */
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/*************************************************************************/
/* Author : Paul Taylor */
/* Date : May 1995 (redone May 1998) */
/*-----------------------------------------------------------------------*/
/* EST_Utterance Class header file */
/* */
/*=======================================================================*/
#ifndef __Utterance_H__
#define __Utterance_H__
#include "EST_String.h"
#include "EST_TList.h"
#include "ling_class/EST_Relation.h"
#include "ling_class/EST_Item.h"
#include "EST_Features.h"
/** A class that contains <link linkend="est-item">EST_Items</link>
and <link linkend="est-relation">EST_Relations</link> between them.
Used for holding interrelated linguistic structures.
*/
class EST_Utterance{
private:
void copy(const EST_Utterance &u);
int highest_id;
public:
/**@name Constructor and initialisation Functions */
//@{
/// default constructor
EST_Utterance();
EST_Utterance(const EST_Utterance &u) { copy(u); }
~EST_Utterance() {clear();}
//@}
///
/**@name Utility Functions */
//@{
/// initialise utterance
void init();
/// remove everything in utterance
void clear();
/// clear the contents of the relations only
void clear_relations();
/// set the next id to be <parameter>n</parameter>
void set_highest_id(int n) {highest_id=n;}
/// return the id of the next item
int next_id();
//@}
/**@name File i/o */
//@{
/** load an utterance from an ascii file
*/
EST_read_status load(const EST_String &filename);
/** load an utterance from a already opened token stream
*/
EST_read_status load(EST_TokenStream &ts);
/** save an utterance to an ascii file
*/
EST_write_status save(const EST_String &filename,
const EST_String &type="est_ascii") const;
/** save an utterance to an ostream
*/
EST_write_status save(ostream &outf,const EST_String &type) const;
//@}
EST_Utterance &operator=(const EST_Utterance &s);
friend ostream& operator << (ostream &s, const EST_Utterance &u);
EST_Relation * operator() (const EST_String &name)
{ return relation(name);}
/** Utterance access
*/
//@{
/// Utterance level features
EST_Features f;
/// Evaluate all feature functions in utterance
void evaluate_all_features();
/// The list of named relations
EST_Features relations;
/// number of relations in this utterance
int num_relations() const { return relations.length(); }
/** returns true if utterance contains named relations.
{\bf name} can be either a single string or a bracketed list
of strings e.g. "(Word Phone Syl)". */
bool relation_present(const EST_String name) const;
/** returns true if utterance contains all the relations
named in the list {\bf name}. */
bool relation_present(EST_StrList &names) const;
/// get relation by name
EST_Relation *relation(const char *name,int err_on_not_found=1) const;
/// return EST_Item whose id is <parameter>n</parameter>.
EST_Item *id(const EST_String &n) const;
/// create a new relation called <parameter>n</parameter>.
EST_Relation *create_relation(const EST_String &relname);
/// remove the relation called <parameter>n</parameter>.
void remove_relation(const EST_String &relname);
void sub_utterance(EST_Item *i);
};
void utt_2_flat_repr( const EST_Utterance &utt,
EST_String &flat_repr );
int utterance_merge(EST_Utterance &utt,
EST_Utterance &sub_utt,
EST_Item *utt_root,
EST_Item *sub_root);
int utterance_merge(EST_Utterance &utt,
EST_Utterance &extra,
EST_String feature);
void sub_utterance(EST_Utterance &sub,EST_Item *i);
#endif
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