count_last_flip_kindergarten.c File Reference

Functions
static int	count_last_flip_A1 (const unsigned long long P)
static int	count_last_flip_B1 (const unsigned long long P)
static int	count_last_flip_C1 (const unsigned long long P)
static int	count_last_flip_D1 (const unsigned long long P)
static int	count_last_flip_E1 (const unsigned long long P)
static int	count_last_flip_F1 (const unsigned long long P)
static int	count_last_flip_G1 (const unsigned long long P)
static int	count_last_flip_H1 (const unsigned long long P)
static int	count_last_flip_A2 (const unsigned long long P)
static int	count_last_flip_B2 (const unsigned long long P)
static int	count_last_flip_C2 (const unsigned long long P)
static int	count_last_flip_D2 (const unsigned long long P)
static int	count_last_flip_E2 (const unsigned long long P)
static int	count_last_flip_F2 (const unsigned long long P)
static int	count_last_flip_G2 (const unsigned long long P)
static int	count_last_flip_H2 (const unsigned long long P)
static int	count_last_flip_A3 (const unsigned long long P)
static int	count_last_flip_B3 (const unsigned long long P)
static int	count_last_flip_C3 (const unsigned long long P)
static int	count_last_flip_D3 (const unsigned long long P)
static int	count_last_flip_E3 (const unsigned long long P)
static int	count_last_flip_F3 (const unsigned long long P)
static int	count_last_flip_G3 (const unsigned long long P)
static int	count_last_flip_H3 (const unsigned long long P)
static int	count_last_flip_A4 (const unsigned long long P)
static int	count_last_flip_B4 (const unsigned long long P)
static int	count_last_flip_C4 (const unsigned long long P)
static int	count_last_flip_D4 (const unsigned long long P)
static int	count_last_flip_E4 (const unsigned long long P)
static int	count_last_flip_F4 (const unsigned long long P)
static int	count_last_flip_G4 (const unsigned long long P)
static int	count_last_flip_H4 (const unsigned long long P)
static int	count_last_flip_A5 (const unsigned long long P)
static int	count_last_flip_B5 (const unsigned long long P)
static int	count_last_flip_C5 (const unsigned long long P)
static int	count_last_flip_D5 (const unsigned long long P)
static int	count_last_flip_E5 (const unsigned long long P)
static int	count_last_flip_F5 (const unsigned long long P)
static int	count_last_flip_G5 (const unsigned long long P)
static int	count_last_flip_H5 (const unsigned long long P)
static int	count_last_flip_A6 (const unsigned long long P)
static int	count_last_flip_B6 (const unsigned long long P)
static int	count_last_flip_C6 (const unsigned long long P)
static int	count_last_flip_D6 (const unsigned long long P)
static int	count_last_flip_E6 (const unsigned long long P)
static int	count_last_flip_F6 (const unsigned long long P)
static int	count_last_flip_G6 (const unsigned long long P)
static int	count_last_flip_H6 (const unsigned long long P)
static int	count_last_flip_A7 (const unsigned long long P)
static int	count_last_flip_B7 (const unsigned long long P)
static int	count_last_flip_C7 (const unsigned long long P)
static int	count_last_flip_D7 (const unsigned long long P)
static int	count_last_flip_E7 (const unsigned long long P)
static int	count_last_flip_F7 (const unsigned long long P)
static int	count_last_flip_G7 (const unsigned long long P)
static int	count_last_flip_H7 (const unsigned long long P)
static int	count_last_flip_A8 (const unsigned long long P)
static int	count_last_flip_B8 (const unsigned long long P)
static int	count_last_flip_C8 (const unsigned long long P)
static int	count_last_flip_D8 (const unsigned long long P)
static int	count_last_flip_E8 (const unsigned long long P)
static int	count_last_flip_F8 (const unsigned long long P)
static int	count_last_flip_G8 (const unsigned long long P)
static int	count_last_flip_H8 (const unsigned long long P)
static int	count_last_flip_pass (const unsigned long long P)
int	count_last_flip (const int x, const unsigned long long P)

Variables
const char	COUNT_FLIP [8][256]
int(*	COUNT_LAST_FLIP [])(const unsigned long long)

Detailed Description

A function is provided to count the number of fipped disc of the last move for each square of the board. These functions are gathered into an array of functions, so that a fast access to each function is allowed. The generic form of the function take as input the player bitboard and return twice the number of flipped disc of the last move.

The basic principle is to read into an array a precomputed result. Doing this is easy for a single line ; as we can use arrays of the form:

• COUNT_FLIP[square where we play][8-bits disc pattern]. The problem is thus to convert any line of a 64-bits disc pattern into an 8-bits disc pattern. A fast way to do this is to select the right line, with a bit-mask, to gather the masked-bits into a continuous set by a simple multiplication and to right-shift the result to scale it into a number between 0 and 255. Once we get our 8-bits disc patterns, we directly get the number of flipped discs from the precomputed array, and add them from each flipping lines. For optimization purpose, the value returned is twice the number of flipped disc, to facilitate the computation of disc difference.

With Modifications by Valéry ClaudePierre (merging diagonals).

Todo:

135° merge as done by Toshihiko Okuhara

Date

1998 - 2017

Author

Richard Delorme

Version

4.4

Function Documentation

count_last_flip()

int count_last_flip	(	const int	x,
		const unsigned long long	P
	)

count_last_flip_A1()

static int count_last_flip_A1 ( const unsigned long long  P )

static

Count last flipped discs when playing on square A1.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_A2()

static int count_last_flip_A2 ( const unsigned long long  P )

static

Count last flipped discs when playing on square A2.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_A3()

static int count_last_flip_A3 ( const unsigned long long  P )

static

Count last flipped discs when playing on square A3.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_A4()

static int count_last_flip_A4 ( const unsigned long long  P )

static

Count last flipped discs when playing on square A4.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_A5()

static int count_last_flip_A5 ( const unsigned long long  P )

static

Count last flipped discs when playing on square A5.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_A6()

static int count_last_flip_A6 ( const unsigned long long  P )

static

Count last flipped discs when playing on square A6.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_A7()

static int count_last_flip_A7 ( const unsigned long long  P )

static

Count last flipped discs when playing on square A7.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_A8()

static int count_last_flip_A8 ( const unsigned long long  P )

static

Count last flipped discs when playing on square A8.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_B1()

static int count_last_flip_B1 ( const unsigned long long  P )

static

Count last flipped discs when playing on square B1.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_B2()

static int count_last_flip_B2 ( const unsigned long long  P )

static

Count last flipped discs when playing on square B2.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_B3()

static int count_last_flip_B3 ( const unsigned long long  P )

static

Count last flipped discs when playing on square B3.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_B4()

static int count_last_flip_B4 ( const unsigned long long  P )

static

Count last flipped discs when playing on square B4.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_B5()

static int count_last_flip_B5 ( const unsigned long long  P )

static

Count last flipped discs when playing on square B5.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_B6()

static int count_last_flip_B6 ( const unsigned long long  P )

static

Count last flipped discs when playing on square B6.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_B7()

static int count_last_flip_B7 ( const unsigned long long  P )

static

Count last flipped discs when playing on square B7.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_B8()

static int count_last_flip_B8 ( const unsigned long long  P )

static

Count last flipped discs when playing on square B8.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_C1()

static int count_last_flip_C1 ( const unsigned long long  P )

static

Count last flipped discs when playing on square C1.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_C2()

static int count_last_flip_C2 ( const unsigned long long  P )

static

Count last flipped discs when playing on square C2.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_C3()

static int count_last_flip_C3 ( const unsigned long long  P )

static

Count last flipped discs when playing on square C3.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_C4()

static int count_last_flip_C4 ( const unsigned long long  P )

static

Count last flipped discs when playing on square C4.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_C5()

static int count_last_flip_C5 ( const unsigned long long  P )

static

Count last flipped discs when playing on square C5.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_C6()

static int count_last_flip_C6 ( const unsigned long long  P )

static

Count last flipped discs when playing on square C6.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_C7()

static int count_last_flip_C7 ( const unsigned long long  P )

static

Count last flipped discs when playing on square C7.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_C8()

static int count_last_flip_C8 ( const unsigned long long  P )

static

Count last flipped discs when playing on square C8.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_D1()

static int count_last_flip_D1 ( const unsigned long long  P )

static

Count last flipped discs when playing on square D1.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_D2()

static int count_last_flip_D2 ( const unsigned long long  P )

static

Count last flipped discs when playing on square D2.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_D3()

static int count_last_flip_D3 ( const unsigned long long  P )

static

Count last flipped discs when playing on square D3.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_D4()

static int count_last_flip_D4 ( const unsigned long long  P )

static

Count last flipped discs when playing on square D4.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_D5()

static int count_last_flip_D5 ( const unsigned long long  P )

static

Count last flipped discs when playing on square D5.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_D6()

static int count_last_flip_D6 ( const unsigned long long  P )

static

Count last flipped discs when playing on square D6.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_D7()

static int count_last_flip_D7 ( const unsigned long long  P )

static

Count last flipped discs when playing on square D7.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_D8()

static int count_last_flip_D8 ( const unsigned long long  P )

static

Count last flipped discs when playing on square D8.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_E1()

static int count_last_flip_E1 ( const unsigned long long  P )

static

Count last flipped discs when playing on square E1.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_E2()

static int count_last_flip_E2 ( const unsigned long long  P )

static

Count last flipped discs when playing on square E2.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_E3()

static int count_last_flip_E3 ( const unsigned long long  P )

static

Count last flipped discs when playing on square E3.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_E4()

static int count_last_flip_E4 ( const unsigned long long  P )

static

Count last flipped discs when playing on square E4.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_E5()

static int count_last_flip_E5 ( const unsigned long long  P )

static

Count last flipped discs when playing on square E5.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_E6()

static int count_last_flip_E6 ( const unsigned long long  P )

static

Count last flipped discs when playing on square E6.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_E7()

static int count_last_flip_E7 ( const unsigned long long  P )

static

Count last flipped discs when playing on square E7.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_E8()

static int count_last_flip_E8 ( const unsigned long long  P )

static

Count last flipped discs when playing on square E8.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_F1()

static int count_last_flip_F1 ( const unsigned long long  P )

static

Count last flipped discs when playing on square F1.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_F2()

static int count_last_flip_F2 ( const unsigned long long  P )

static

Count last flipped discs when playing on square F2.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_F3()

static int count_last_flip_F3 ( const unsigned long long  P )

static

Count last flipped discs when playing on square F3.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_F4()

static int count_last_flip_F4 ( const unsigned long long  P )

static

Count last flipped discs when playing on square F4.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_F5()

static int count_last_flip_F5 ( const unsigned long long  P )

static

Count last flipped discs when playing on square F5.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_F6()

static int count_last_flip_F6 ( const unsigned long long  P )

static

Count last flipped discs when playing on square F6.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_F7()

static int count_last_flip_F7 ( const unsigned long long  P )

static

Count last flipped discs when playing on square F7.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_F8()

static int count_last_flip_F8 ( const unsigned long long  P )

static

Count last flipped discs when playing on square F8.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_G1()

static int count_last_flip_G1 ( const unsigned long long  P )

static

Count last flipped discs when playing on square G1.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_G2()

static int count_last_flip_G2 ( const unsigned long long  P )

static

Count last flipped discs when playing on square G2.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_G3()

static int count_last_flip_G3 ( const unsigned long long  P )

static

Count last flipped discs when playing on square G3.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_G4()

static int count_last_flip_G4 ( const unsigned long long  P )

static

Count last flipped discs when playing on square G4.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_G5()

static int count_last_flip_G5 ( const unsigned long long  P )

static

Count last flipped discs when playing on square G5.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_G6()

static int count_last_flip_G6 ( const unsigned long long  P )

static

Count last flipped discs when playing on square G6.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_G7()

static int count_last_flip_G7 ( const unsigned long long  P )

static

Count last flipped discs when playing on square G7.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_G8()

static int count_last_flip_G8 ( const unsigned long long  P )

static

Count last flipped discs when playing on square G8.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_H1()

static int count_last_flip_H1 ( const unsigned long long  P )

static

Count last flipped discs when playing on square H1.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_H2()

static int count_last_flip_H2 ( const unsigned long long  P )

static

Count last flipped discs when playing on square H2.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_H3()

static int count_last_flip_H3 ( const unsigned long long  P )

static

Count last flipped discs when playing on square H3.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_H4()

static int count_last_flip_H4 ( const unsigned long long  P )

static

Count last flipped discs when playing on square H4.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_H5()

static int count_last_flip_H5 ( const unsigned long long  P )

static

Count last flipped discs when playing on square H5.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_H6()

static int count_last_flip_H6 ( const unsigned long long  P )

static

Count last flipped discs when playing on square H6.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_H7()

static int count_last_flip_H7 ( const unsigned long long  P )

static

Count last flipped discs when playing on square H7.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_H8()

static int count_last_flip_H8 ( const unsigned long long  P )

static

Count last flipped discs when playing on square H8.

Parameters

P	player's disc pattern.

Returns

flipped disc count.

count_last_flip_pass()

static int count_last_flip_pass ( const unsigned long long  P )

static

Count last flipped discs when plassing.

Parameters

P	player's disc pattern (unused).

Returns

zero.

Variable Documentation

COUNT_FLIP

const char COUNT_FLIP[8][256]

precomputed count flip array

COUNT_LAST_FLIP

int(* COUNT_LAST_FLIP[])(const unsigned long long)

Initial value:

= {
        count_last_flip_A1, count_last_flip_B1, count_last_flip_C1, count_last_flip_D1,
        count_last_flip_E1, count_last_flip_F1, count_last_flip_G1, count_last_flip_H1,
        count_last_flip_A2, count_last_flip_B2, count_last_flip_C2, count_last_flip_D2,
        count_last_flip_E2, count_last_flip_F2, count_last_flip_G2, count_last_flip_H2,
        count_last_flip_A3, count_last_flip_B3, count_last_flip_C3, count_last_flip_D3,
        count_last_flip_E3, count_last_flip_F3, count_last_flip_G3, count_last_flip_H3,
        count_last_flip_A4, count_last_flip_B4, count_last_flip_C4, count_last_flip_D4,
        count_last_flip_E4, count_last_flip_F4, count_last_flip_G4, count_last_flip_H4,
        count_last_flip_A5, count_last_flip_B5, count_last_flip_C5, count_last_flip_D5,
        count_last_flip_E5, count_last_flip_F5, count_last_flip_G5, count_last_flip_H5,
        count_last_flip_A6, count_last_flip_B6, count_last_flip_C6, count_last_flip_D6,
        count_last_flip_E6, count_last_flip_F6, count_last_flip_G6, count_last_flip_H6,
        count_last_flip_A7, count_last_flip_B7, count_last_flip_C7, count_last_flip_D7,
        count_last_flip_E7, count_last_flip_F7, count_last_flip_G7, count_last_flip_H7,
        count_last_flip_A8, count_last_flip_B8, count_last_flip_C8, count_last_flip_D8,
        count_last_flip_E8, count_last_flip_F8, count_last_flip_G8, count_last_flip_H8,
        count_last_flip_pass,
}

Array of functions to count flipped discs of the last move