Add zobrist hash tables
This commit is contained in:
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@ -27,3 +27,6 @@ pub use rank::*;
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pub mod square;
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pub use square::*;
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pub mod zobrist;
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pub use zobrist::*;
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978
src/board/zobrist.rs
Normal file
978
src/board/zobrist.rs
Normal file
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@ -0,0 +1,978 @@
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// vim: foldmethod=marker
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use super::{CastleRights, Color, File, Piece, Square};
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type Hash = u64;
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type EnPassantHashesType = [Hash; File::NUM_VARIANTS];
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type CastlingHashesType = [[Hash; CastleRights::NUM_VARIANTS]; CastleRights::NUM_VARIANTS];
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type PieceHashesType = [[[Hash; Square::NUM_VARIANTS]; Piece::NUM_VARIANTS]; Color::NUM_VARIANTS];
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// region:sourcegen {{{
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static BLACK_TO_MOVE: Hash = 64934999470316615;
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static EN_PASSANT_HASHES: EnPassantHashesType = [
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];
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static CASTLING_HASHES: CastlingHashesType = [
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[
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],
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[
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],
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[
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],
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],
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];
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static PIECE_HASHES: PieceHashesType = [
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[
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[
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|
||||
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|
||||
],
|
||||
],
|
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[
|
||||
[
|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
||||
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|
||||
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
||||
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|
||||
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|
||||
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|
||||
],
|
||||
[
|
||||
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|
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|
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|
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|
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|
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||||
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|
||||
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|
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|
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|
||||
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|
||||
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|
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|
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|
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|
||||
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|
||||
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|
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|
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|
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|
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|
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|
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
12929297255917642880,
|
||||
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|
||||
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|
||||
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|
||||
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|
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|
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|
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
],
|
||||
[
|
||||
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||||
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|
||||
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|
||||
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||||
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|
||||
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||||
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|
||||
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||||
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|
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|
||||
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|
||||
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|
||||
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|
||||
11847570994151287255,
|
||||
14050715334936968126,
|
||||
5448278994699028448,
|
||||
5062909158550936849,
|
||||
11465405229960447949,
|
||||
2779995984806079730,
|
||||
8108449415663851271,
|
||||
5925771076410909364,
|
||||
4398525992925930953,
|
||||
15105632689435380115,
|
||||
8224881353639377989,
|
||||
13142137441375466514,
|
||||
402244963327403059,
|
||||
15972426265038828054,
|
||||
14918608839495061965,
|
||||
4783523652206804079,
|
||||
5533802637901392118,
|
||||
15857468142361536438,
|
||||
483935465300448184,
|
||||
17547570023467671419,
|
||||
9118083899124499413,
|
||||
16067662280423557207,
|
||||
14860481864823305290,
|
||||
12544461391667452601,
|
||||
16479998523741582369,
|
||||
2004653907916258288,
|
||||
10016134492966295503,
|
||||
14654098897665700345,
|
||||
15597902928417621210,
|
||||
17875771155388593350,
|
||||
12187680377949566458,
|
||||
6591854158971319321,
|
||||
10921345154959883977,
|
||||
6992586914959052076,
|
||||
6881186710214967907,
|
||||
10133687459128153147,
|
||||
11053978924568326706,
|
||||
13937927219834850327,
|
||||
3101883468469491331,
|
||||
8427212063981998124,
|
||||
2092323926080990908,
|
||||
3585817315360256386,
|
||||
15747726726131045899,
|
||||
16440560833072674588,
|
||||
18384346789732354577,
|
||||
16783457322743335580,
|
||||
11756627869063466658,
|
||||
11167824433661290940,
|
||||
9877633665654560039,
|
||||
17040076472624122335,
|
||||
3220010953426300691,
|
||||
],
|
||||
[
|
||||
2440551681152908217,
|
||||
17542921143062722953,
|
||||
11172685451694101778,
|
||||
1048396501496535768,
|
||||
6426140309273374561,
|
||||
12612852760901936331,
|
||||
1512574622848540746,
|
||||
12173187909250955505,
|
||||
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|
||||
11997025710748266437,
|
||||
7697722427032893513,
|
||||
3131801314231591172,
|
||||
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|
||||
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|
||||
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|
||||
3402776113237843614,
|
||||
1763635255903222910,
|
||||
1493348699626208256,
|
||||
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|
||||
345811979331432929,
|
||||
6373077428271171816,
|
||||
2460378116234706383,
|
||||
7628144846272841726,
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
13253731529913205555,
|
||||
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|
||||
13535231015523935415,
|
||||
10292012323401205180,
|
||||
1773004715998349698,
|
||||
16799776551041782060,
|
||||
10929981434226220413,
|
||||
5672227401526069291,
|
||||
15197185234723998232,
|
||||
2327868618089768447,
|
||||
11691196257790359528,
|
||||
7797108122232849111,
|
||||
17247378053385545795,
|
||||
17190992283359664342,
|
||||
11765180081852900764,
|
||||
17136020481758062916,
|
||||
16631142675265592717,
|
||||
2780308612474172011,
|
||||
13623309349488327240,
|
||||
10027477427374497277,
|
||||
10901098973779551879,
|
||||
13622367348979020321,
|
||||
17240066494945993895,
|
||||
3613111118313098801,
|
||||
3595718136710251489,
|
||||
15541177346768674456,
|
||||
2745954478213783820,
|
||||
2993333600340807291,
|
||||
7964104343962539977,
|
||||
2018911365155885783,
|
||||
303730231039108799,
|
||||
8347454704269268605,
|
||||
15168982392769178779,
|
||||
2222543894286897630,
|
||||
7116612461922271036,
|
||||
],
|
||||
[
|
||||
6659924125020249146,
|
||||
6447320752673406213,
|
||||
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|
||||
13067246238653248617,
|
||||
17543091787100809270,
|
||||
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|
||||
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|
||||
8400586664049469607,
|
||||
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|
||||
15466110299051417899,
|
||||
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|
||||
7116524366403677718,
|
||||
16169260265445853433,
|
||||
8692955756594060325,
|
||||
16615201418588912179,
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
13554787615980332253,
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
17405285323670017057,
|
||||
342959662696107471,
|
||||
1347610445893916230,
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
12713062183167165488,
|
||||
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|
||||
12719695066185815582,
|
||||
15494003269637617920,
|
||||
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|
||||
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|
||||
13045361994561212689,
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
11263635798182361717,
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
4523550137711543282,
|
||||
12457522381881075539,
|
||||
4092390258313244045,
|
||||
3708028013704908406,
|
||||
16685460470125872576,
|
||||
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|
||||
12879711695951990697,
|
||||
4790961591497355085,
|
||||
8914134962745961064,
|
||||
15580015213313907777,
|
||||
8644499442940218319,
|
||||
61217168966658081,
|
||||
],
|
||||
[
|
||||
2912759343743843999,
|
||||
14884813698979495195,
|
||||
16425233319897104847,
|
||||
14688503175962192854,
|
||||
16633510544151871827,
|
||||
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|
||||
585745436804207639,
|
||||
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|
||||
18381405436219133756,
|
||||
14689295466480430970,
|
||||
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|
||||
12658459328140256364,
|
||||
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|
||||
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|
||||
8009151754207580377,
|
||||
4847981282259436185,
|
||||
1433660584766270169,
|
||||
5274091252087296014,
|
||||
13330399601366117612,
|
||||
16588395809568307079,
|
||||
14448566552430231758,
|
||||
13343329601558313195,
|
||||
12158146930071854376,
|
||||
4197885034159347546,
|
||||
3445100139072421635,
|
||||
16609318396120447823,
|
||||
6042075030399342756,
|
||||
13793584353850054662,
|
||||
16021579771298913846,
|
||||
11054052814289128888,
|
||||
16074104597928497109,
|
||||
15130554541552071802,
|
||||
4895805849687331062,
|
||||
1580544981451361794,
|
||||
2425277209291829232,
|
||||
7864782989239724936,
|
||||
17589104864303907651,
|
||||
15274489251065018408,
|
||||
5101250638773604988,
|
||||
2484123793698223520,
|
||||
5015053599434799784,
|
||||
16436209554247109768,
|
||||
10530941408166861910,
|
||||
7952403580920522728,
|
||||
14690149799888783296,
|
||||
3789888246444727158,
|
||||
18109247358095710450,
|
||||
3088677810223885810,
|
||||
5022612625499977309,
|
||||
7112612464628965285,
|
||||
4566226729227242637,
|
||||
5042221516346092028,
|
||||
16846599512836514536,
|
||||
6256199833536459738,
|
||||
2014937527629117588,
|
||||
17739428229013858448,
|
||||
13982298082608600032,
|
||||
17248258267345510543,
|
||||
18214829730500207223,
|
||||
7600462139109877437,
|
||||
6812119576048580698,
|
||||
6424206435528040580,
|
||||
487857718885957481,
|
||||
13371986807426798615,
|
||||
],
|
||||
],
|
||||
];
|
||||
// endregion:sourcegen }}}
|
||||
|
||||
/// Return the Zobrist hash for a [Piece] of a given [Color] on a given [Square].
|
||||
pub fn moved_piece(color: Color, piece: Piece, square: Square) -> Hash {
|
||||
PIECE_HASHES[color.index()][piece.index()][square.index()]
|
||||
}
|
||||
|
||||
/// Return the Zobrist hash for the [CastleRights] for a [Color].
|
||||
pub fn castling_rights(rights: [CastleRights; Color::NUM_VARIANTS]) -> Hash {
|
||||
CASTLING_HASHES[rights[0].index()][rights[1].index()]
|
||||
}
|
||||
|
||||
/// Return the Zobrist hash for the [File] of an en-passant capture.
|
||||
pub fn en_passant(file: File) -> Hash {
|
||||
EN_PASSANT_HASHES[file.index()]
|
||||
}
|
||||
|
||||
/// Return the Zobrist hash for the given side-to-move being [Color::Black].
|
||||
pub fn side_to_move() -> Hash {
|
||||
BLACK_TO_MOVE
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod test {
|
||||
use std::fmt::{Display, Write as _};
|
||||
|
||||
use super::*;
|
||||
use crate::utils::SimpleRng;
|
||||
|
||||
fn split_twice<'a>(
|
||||
text: &'a str,
|
||||
start_marker: &str,
|
||||
end_marker: &str,
|
||||
) -> Option<(&'a str, &'a str, &'a str)> {
|
||||
let (prefix, rest) = text.split_once(start_marker)?;
|
||||
let (mid, suffix) = rest.split_once(end_marker)?;
|
||||
Some((prefix, mid, suffix))
|
||||
}
|
||||
|
||||
fn array_string<T: Display>(indent_level: usize, values: &[T]) -> String {
|
||||
let inner = || -> Result<String, std::fmt::Error> {
|
||||
let mut res = String::new();
|
||||
|
||||
writeln!(&mut res, "[")?;
|
||||
for val in values {
|
||||
let indent = (indent_level + 1) * 4;
|
||||
writeln!(&mut res, "{:indent$}{},", "", val)?;
|
||||
}
|
||||
let indent = indent_level * 4;
|
||||
write!(&mut res, "{:indent$}]", "")?;
|
||||
|
||||
Ok(res)
|
||||
};
|
||||
|
||||
inner().unwrap()
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn regen_zobrist_hashes() {
|
||||
let mut rng = SimpleRng::new();
|
||||
|
||||
macro_rules! rng_iter {
|
||||
($outer:expr, $( $inner:expr ),+) => {{
|
||||
let mut res = vec![];
|
||||
for _ in $outer {
|
||||
res.push(rng_iter!($($inner),+));
|
||||
}
|
||||
res
|
||||
}};
|
||||
($iter:expr) => {{
|
||||
let mut res = vec![];
|
||||
for _ in $iter {
|
||||
res.push(rng.gen());
|
||||
}
|
||||
res
|
||||
}};
|
||||
}
|
||||
|
||||
let black_to_move = rng.gen();
|
||||
let en_passant = rng_iter!(File::iter());
|
||||
let castle_rights = rng_iter!(CastleRights::iter(), CastleRights::iter());
|
||||
let move_piece = rng_iter!(Color::iter(), Piece::iter(), Square::iter());
|
||||
|
||||
let original_text = std::fs::read_to_string(file!()).unwrap();
|
||||
let new_text = {
|
||||
let start_marker = "// region:sourcegen {{{\n";
|
||||
let end_marker = "// endregion:sourcegen }}}\n";
|
||||
let (prefix, _, suffix) =
|
||||
split_twice(&original_text, start_marker, end_marker).unwrap();
|
||||
|
||||
let black_to_move = format!("static BLACK_TO_MOVE: Hash = {};\n", black_to_move);
|
||||
let en_passant = format!(
|
||||
"static EN_PASSANT_HASHES: EnPassantHashesType = {};\n",
|
||||
array_string(0, &en_passant[..]),
|
||||
);
|
||||
let castle_rights = {
|
||||
let strings: Vec<_> = castle_rights
|
||||
.iter()
|
||||
.map(|v| array_string(1, &v[..]))
|
||||
.collect();
|
||||
format!(
|
||||
"static CASTLING_HASHES: CastlingHashesType = {};\n",
|
||||
array_string(0, &strings[..])
|
||||
)
|
||||
};
|
||||
let move_piece = {
|
||||
let strings: Vec<_> = move_piece
|
||||
.iter()
|
||||
.map(|v| {
|
||||
let strings: Vec<_> = v.iter().map(|v| array_string(2, &v[..])).collect();
|
||||
array_string(1, &strings[..])
|
||||
})
|
||||
.collect();
|
||||
format!(
|
||||
"static PIECE_HASHES: PieceHashesType = {};\n",
|
||||
array_string(0, &strings[..])
|
||||
)
|
||||
};
|
||||
let hashes = format!("{black_to_move}\n{en_passant}\n{castle_rights}\n{move_piece}");
|
||||
format!("{prefix}{start_marker}{hashes}{end_marker}{suffix}")
|
||||
};
|
||||
|
||||
if new_text != original_text {
|
||||
std::fs::write(file!(), new_text).unwrap();
|
||||
panic!("source was not up-to-date")
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in a new issue