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/*
* Program: pgn-extract: a Portable Game Notation (PGN) extractor.
* Copyright (C) 1994-2001 David Barnes
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 1, or (at your option)
* any later version.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* David Barnes may be contacted as D.J.Barnes@ukc.ac.uk
* http://www.cs.ukc.ac.uk/people/staff/djb/
*
*/
/* Define a type to hold hash values of interest.
* This is used both to aid in duplicate detection
* and in finding positional variations.
*/
typedef struct HashLog {
/* combined_hash_value is the XOR of the final position hash value and
* the cumulative hash value for a game.
*/
HashCode combined_hash_value;
/* Record the file list index for the file this game was first found in. */
int file_number;
struct HashLog *next;
} HashLog;
void init_duplicate_hash_table(void);
void clear_duplicate_hash_table(void);
const char *previous_occurance(Game game_details);
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