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#ifndef __EST_FEATURES_AUX_H__
#define __EST_FEATURES_AUX_H__

/** Non core feature functionality.
  * 
  * @author Richard Caley <rjc@cstr.ed.ac.uk>
  * @version $Id: EST_features_aux.h,v 1.3 2004/05/04 00:00:17 awb Exp $
  */

//@{

#include <speech_tools/EST_Features.h>

class EST_String;
class EST_Val;

/** Safe feature access functions.
  * 
  * These functions are guaranteed to return a value even if
  * there is an otherwise fatal error.
  */
//@{

/** What happened when we tried to look up a value.
  */
enum EST_feat_status
{
  /// All OK, value returned.
  efs_ok=0,

  /// No value for feature, default returned
  efs_not_set=1,

  /// An error occurred and was caught.
  efs_error=2
};


/// Return the value as an EST_Val.
EST_Val getVal(const EST_Features &f,
	       const EST_String name,
	       const EST_Val &def,
	       EST_feat_status &status);

/// Return the value as a string.
EST_String getString(const EST_Features &f,
		     const EST_String name,
		     const EST_String &def,
		     EST_feat_status &status);

/// Return the values as a float.
float getFloat(const EST_Features &f,
	       const EST_String name,
	       float def,
	       EST_feat_status &status);

/// Return the values as a float.
int getInteger(const EST_Features &f,
	       const EST_String name,
	       int def,
	       EST_feat_status &status);
//@}
		     

VAL_REGISTER_FUNCPTR_DCLS(pointer, void *)

  //@}

#endif

