/* board.h
 *
 */

/*
      icds - Internet Checkers and Draughts Server
      Copyright (c) 1997 by Michael Rohrer

    fics - An internet chess server.
    Copyright (C) 1993  Richard V. Nash

    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 2 of the License, 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.
*/

/* Revision history:
   name		email		yy/mm/dd	Change
   Richard Nash	              	93/10/22	Created
   Michael Rohrer               97/05/01        Modified
*/

#ifndef _BOARD_H
#define _BOARD_H

#define WHITE 0x00
#define BLACK 0x80
#define CString( c ) (((c) == WHITE) ? "White" : "Black" )
#define CToggle( c ) (((c) == BLACK) ? WHITE : BLACK )

/* These are indexes into an array so their values are not arbitrary */
#define NOPIECE 0x00
#define PIECE 0x01
#define KING  0x02
/* #define PPIECE 0x03 
   #define PKING 0x04 */

#define MAX_BOARD_STRING_LEGTH 1280	/* Abitrarily 80 * 16 */
#define MAX_STYLES 5

#define W_PIECE (PIECE | WHITE)
#define W_KING  (KING  | WHITE)
/* #define W_PPIECE (PPIECE | WHITE)
   #define W_PKING (PKING | WHITE) */

#define B_PIECE (PIECE | BLACK)
#define B_KING  (KING  | BLACK)
/* #define B_PPIECE (PPIECE | BLACK)
   #define B_PKING (PKING | BLACK) */

#define isblack(p) (((p) & BLACK) == BLACK)
#define iswhite(p) ((((p) & BLACK) == WHITE) && (p != NOPIECE))
#define iscolor(p,color) (((p) & BLACK) == (color))
       /* for replacing !iscolor and having separate check for nopiece */
#define isnotcolor(p,color) ((((p) & BLACK) != (color)) && (p != NOPIECE))
#define piecetype(p) ((p) & 0x0f)
#define colorval(p) ((p) & 0x80)
#define square_color(r,f) ((((r)+(f)) & 0x01) ? BLACK : WHITE)


extern int pieceValues[5];

/* Treated as [file][rank] */
typedef int board_t[10][10];

typedef struct _game_state_t {
  board_t board;
  /* For draws */
  int lastIrreversable;
  int onMove;
  int moveNum;
  /* Game num not saved, must be restored when read */
  int gameNum;
} game_state_t;

typedef struct _square {
  int file, rank;
} spot;

typedef struct _move_t {
  int color;
  spot square[10];
  /*  int fromFile, fromRank, toFile, toRank; */
  int capFile, capRank;
  int pieceCaptured;
  char moveString[30];
  char algString[30];
  unsigned char FENpos[74];    /* This replaces the boardList. */
  unsigned atTime;
  unsigned tookTime;
} move_t;

#define MoveToHalfMove( gs ) ((((gs)->moveNum - 1) * 2) + (((gs)->onMove == WHITE) ? 0 : 1))

extern char *wpstring[];
extern char *bpstring[];

extern int board_init(game_state_t *, int);
extern void board_calc_strength(game_state_t *, int *, int *);
extern char *board_to_string(char *, char *, int, int, game_state_t *, move_t *, int, int, int, int);
extern char *move_and_time(move_t *);
extern int board_load_british(game_state_t *);
extern int board_load_pool(game_state_t *);
extern int board_load_spanish(game_state_t *);
extern int board_load_polish(game_state_t *);
/* extern int board_read_file(char *, game_state_t *); */

extern int fgetc();

#endif