bearoff.h

/*
 * bearoff.h
 *
 * by Joern Thyssen <jthyssen@dk.ibm.com>, 2002
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 3 or later of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * $Id: bearoff.h,v 1.28 2012/03/25 14:50:18 plm Exp $
 */

#ifndef _BEAROFF_H_
#define _BEAROFF_H_

#include "gnubg-types.h"

#include <glib.h>

typedef enum _bearofftype {
	BEAROFF_INVALID,
  BEAROFF_ONESIDED,
  BEAROFF_TWOSIDED,
  BEAROFF_HYPERGAMMON
} bearofftype;

typedef struct _bearoffcontext
{
  FILE *pf;          /* file pointer */
  bearofftype bt; /* type of bearoff database */
  unsigned int nPoints;    /* number of points covered by database */
  unsigned int nChequers;  /* number of chequers for one-sided database */
  char *szFilename; /* filename */
  /* one sided dbs */
  int fCompressed; /* is database compressed? */
  int fGammon;     /* gammon probs included */
  int fND;         /* normal distibution instead of exact dist? */
  int fHeuristic;  /* heuristic database? */
  /* two sided dbs */
  int fCubeful;    /* cubeful equities included */
#if GLIB_CHECK_VERSION(2,8,0)
  GMappedFile *map;
#endif
  unsigned char *p;        /* pointer to data in memory */

  unsigned long int nReads; /* number of reads */

} bearoffcontext;

enum _bearoffoptions {
  BO_NONE              = 0,
  BO_IN_MEMORY         = 1,
  BO_MUST_BE_ONE_SIDED = 2,
  BO_MUST_BE_TWO_SIDED = 4,
  BO_HEURISTIC         = 8
};

extern bearoffcontext *BearoffInit ( const char *szFilename, const int bo, void (*p)(unsigned int) );

extern bearoffcontext *BearoffInitBuiltin ( void );

extern int
BearoffEval ( const bearoffcontext *pbc, const TanBoard anBoard, float arOutput[] );

extern void
BearoffStatus ( const bearoffcontext *pbc, char *sz );

extern int
BearoffDump ( const bearoffcontext *pbc, const TanBoard anBoard, char *sz );

extern int
BearoffDist ( const bearoffcontext *pbc, const unsigned int nPosID,
              float arProb[ 32 ], float arGammonProb[ 32 ],
              float ar[ 4 ],
              unsigned short int ausProb[ 32 ], 
              unsigned short int ausGammonProb[ 32 ] );

extern int
BearoffCubeful ( const bearoffcontext *pbc,
                 const unsigned int iPos,
                 float ar[ 4 ], unsigned short int aus[ 4 ] );

extern void BearoffClose ( bearoffcontext *ppbc );

extern int
isBearoff ( const bearoffcontext *pbc, const TanBoard anBoard );

extern float
fnd ( const float x, const float mu, const float sigma  );

extern int
BearoffHyper( const bearoffcontext *pbc,
              const unsigned int iPos,
              float arOutput[], float arEquity[] );

#endif /* _BEAROFF_H_ */