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patterns.h
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patterns.h
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/*
File: patterns.h
Created: July 4, 1997
Modified: August 1, 2002
Author: Gunnar Andersson (gunnar@radagast.se)
Contents: The patterns.
*/
#ifndef PATTERNS_H
#define PATTERNS_H
#include "constant.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Predefined two-bit patterns. */
#define EMPTY_PATTERN 0
#define BLACK_PATTERN 1
#define WHITE_PATTERN 2
/* Board patterns used in position evaluation */
#define PATTERN_COUNT 46
#define AFILEX1 0
#define AFILEX2 1
#define AFILEX3 2
#define AFILEX4 3
#define BFILE1 4
#define BFILE2 5
#define BFILE3 6
#define BFILE4 7
#define CFILE1 8
#define CFILE2 9
#define CFILE3 10
#define CFILE4 11
#define DFILE1 12
#define DFILE2 13
#define DFILE3 14
#define DFILE4 15
#define DIAG8_1 16
#define DIAG8_2 17
#define DIAG7_1 18
#define DIAG7_2 19
#define DIAG7_3 20
#define DIAG7_4 21
#define DIAG6_1 22
#define DIAG6_2 23
#define DIAG6_3 24
#define DIAG6_4 25
#define DIAG5_1 26
#define DIAG5_2 27
#define DIAG5_3 28
#define DIAG5_4 29
#define DIAG4_1 30
#define DIAG4_2 31
#define DIAG4_3 32
#define DIAG4_4 33
#define CORNER33_1 34
#define CORNER33_2 35
#define CORNER33_3 36
#define CORNER33_4 37
#define CORNER42_1 38
#define CORNER42_2 39
#define CORNER42_3 40
#define CORNER42_4 41
#define CORNER42_5 42
#define CORNER42_6 43
#define CORNER42_7 44
#define CORNER42_8 45
#define CORNER52_1 38
#define CORNER52_2 39
#define CORNER52_3 40
#define CORNER52_4 41
#define CORNER52_5 42
#define CORNER52_6 43
#define CORNER52_7 44
#define CORNER52_8 45
extern int pow3[10];
/* Connections between the squares and the bit masks */
extern int row_no[100];
extern int row_index[100];
extern int col_no[100];
extern int col_index[100];
extern int color_pattern[3];
/* The patterns describing the current state of the board. */
extern int row_pattern[8];
extern int col_pattern[8];
/* Symmetry maps */
extern int flip8[6561];
/* Masks which represent dependencies between discs and patterns */
extern unsigned int depend_lo[100];
extern unsigned int depend_hi[100];
/* Bit masks that show what patterns have been modified */
extern unsigned int modified_lo;
extern unsigned int modified_hi;
void
init_patterns( void );
void
compute_line_patterns( int *in_board );
#ifdef __cplusplus
}
#endif
#endif /* PATTERNS_H */