{"header":{"message":"Add BitBoard, Square enum and helper methods","description":null,"timestamp":"2022-12-12T23:11:10.216635219Z","authors":[{}]},"hash":"A46B5KNQFPTZEIL2JZKD2CQELGU3COE6FGTV2ABS5U7DVTVDGEBQC","authors":[{"login":"voroskoi","key":"Guf8VYJNUiWAqxwLxDSKxmvvtY65ht2zK2q4h6VhxrcZ"}],"deps":{"hashes":[["A46B5KNQFPTZEIL2JZKD2CQELGU3COE6FGTV2ABS5U7DVTVDGEBQC","Add BitBoard, Square enum and helper methods"],["AA",null],["I5ZS5U356QWN6INGPAFJ4LX3BH7BHEUGJPZQ5WVQFIBFF6OTB3RAC",""]],"deps":["I5ZS5U356QWN6INGPAFJ4LX3BH7BHEUGJPZQ5WVQFIBFF6OTB3RAC"],"known":[]},"hunks":[{"FileAdd":{"meta":{"basename":"src","metadata":576},"context":[{"change":2,"pos":1}],"contents":[]}},{"FileAdd":{"meta":{"basename":"main.zig","metadata":0},"context":[{"change":0,"pos":15}],"contents":[{"Add":"const std = @import(\"std\");"},{"Add":""},{"Add":"pub fn main() !void {"},{"Add":" var bit_board: BitBoard = .{ .board = 0 };"},{"Add":" bit_board.show();"},{"Add":"}"},{"Add":""},{"Add":"const Square = enum(BoardType) {"},{"Add":" // zig fmt: off"},{"Add":" a8, b8, c8, d8, e8, f8, g8, h8,"},{"Add":" a7, b7, c7, d7, e7, f7, g7, h7,"},{"Add":" a6, b6, c6, d6, e6, f6, g6, h6,"},{"Add":" a5, b5, c5, d5, e5, f5, g5, h5,"},{"Add":" a4, b4, c4, d4, e4, f4, g4, h4,"},{"Add":" a3, b3, c3, d3, e3, f3, g3, h3,"},{"Add":" a2, b2, c2, d2, e2, f2, g2, h2,"},{"Add":" a1, b1, c1, d1, e1, f1, g1, h1,"},{"Add":" // zig fmt: on"},{"Add":""},{"Add":" fn int(self: @This()) u6 {"},{"Add":" return @intCast(u6, @enumToInt(self));"},{"Add":" }"},{"Add":"};"},{"Add":""},{"Add":"const SIZE = 8;"},{"Add":"const BoardType = u64;"},{"Add":"const BitBoard = packed struct(BoardType) {"},{"Add":" board: BoardType = 0,"},{"Add":""},{"Add":" fn set(self: *@This(), square: Square) void {"},{"Add":" self.board |= @as(BoardType, 1) << square.int();"},{"Add":" }"},{"Add":""},{"Add":" fn isSet(self: @This(), square: Square) bool {"},{"Add":" return (self.board & @as(BoardType, 1) << square.int() != 0);"},{"Add":" }"},{"Add":""},{"Add":" fn unSet(self: *@This(), square: Square) void {"},{"Add":" self.board &= @as(BoardType, 0) << square.int();"},{"Add":" }"},{"Add":""},{"Add":" fn flip(self: *@This(), square: Square) void {"},{"Add":" self.board ^= @as(BoardType, 1) << square.int();"},{"Add":" }"},{"Add":""},{"Add":" // pop removes the bit if set"},{"Add":" fn pop(self: *@This(), square: Square) void {"},{"Add":" if (self.isSet(square))"},{"Add":" self.board ^= @as(BoardType, 1) << square.int();"},{"Add":" }"},{"Add":""},{"Add":" fn show(self: @This()) void {"},{"Add":" var rank: usize = 0;"},{"Add":" while (rank < SIZE) : (rank += 1) {"},{"Add":" var file: usize = 0;"},{"Add":" while (file < SIZE) : (file += 1) {"},{"Add":" if (file == 0) std.debug.print(\"{d}| \", .{SIZE - rank});"},{"Add":""},{"Add":" const square = @intCast(u6, rank * SIZE + file);"},{"Add":" const mask: usize = if (self.board & (@as(BoardType, 1) << square) != 0) 1 else 0;"},{"Add":" std.debug.print(\"{d} \", .{mask});"},{"Add":" }"},{"Add":" std.debug.print(\"\\n\", .{});"},{"Add":" }"},{"Add":" std.debug.print(\"{s:>18}\\n\", .{\"---------------\"});"},{"Add":" std.debug.print(\"{s:>18}\\n\", .{\"a b c d e f g h\"});"},{"Add":""},{"Add":" std.debug.print(\"\\nBitBoard: {d}\\n\", .{self.board});"},{"Add":" }"},{"Add":"};"},{"Add":""},{"Add":"test \"BitBoard\" {"},{"Add":" { // set, unSet"},{"Add":" var bb: BitBoard = .{};"},{"Add":" try std.testing.expectEqual(@as(BoardType, 0), bb.board);"},{"Add":""},{"Add":" bb.set(.a8);"},{"Add":" try std.testing.expectEqual(@as(BoardType, 1), bb.board);"},{"Add":""},{"Add":" bb.unSet(.a8);"},{"Add":" bb.set(.h1);"},{"Add":" const exp = @as(BoardType, 1) << @as(u6, 63);"},{"Add":" try std.testing.expectEqual(exp, bb.board);"},{"Add":" }"},{"Add":""},{"Add":" { // flip"},{"Add":" var bb: BitBoard = .{};"},{"Add":""},{"Add":" bb.set(.e4);"},{"Add":" try std.testing.expect(bb.isSet(.e4));"},{"Add":" bb.set(.f1);"},{"Add":" try std.testing.expect(bb.isSet(.f1));"},{"Add":""},{"Add":" bb.flip(.e4);"},{"Add":" bb.flip(.f1);"},{"Add":" try std.testing.expectEqual(@as(BoardType, 0), bb.board);"},{"Add":""},{"Add":" bb.flip(.f1); // sets f1 again"},{"Add":" try std.testing.expectEqual("},{"Add":" @as(BoardType, @as(BoardType, 1) << @enumToInt(Square.f1)),"},{"Add":" bb.board,"},{"Add":" );"},{"Add":" }"},{"Add":""},{"Add":" { // pop"},{"Add":" var bb: BitBoard = .{};"},{"Add":""},{"Add":" bb.set(.e4);"},{"Add":" bb.set(.f1);"},{"Add":" bb.pop(.e4);"},{"Add":" bb.pop(.f1);"},{"Add":""},{"Add":" bb.set(.g3);"},{"Add":" try std.testing.expectEqual("},{"Add":" @as(BoardType, @as(BoardType, 1) << @enumToInt(Square.g3)),"},{"Add":" bb.board,"},{"Add":" );"},{"Add":""},{"Add":" bb.pop(.e4); // does nothing"},{"Add":" try std.testing.expectEqual("},{"Add":" @as(BoardType, @as(BoardType, 1) << @enumToInt(Square.g3)),"},{"Add":" bb.board,"},{"Add":" );"},{"Add":" }"},{"Add":"}"}]}},{"FileAdd":{"meta":{"basename":"build.zig","metadata":0},"context":[{"change":2,"pos":1}],"contents":[{"Add":"const std = @import(\"std\");"},{"Add":""},{"Add":"pub fn build(b: *std.build.Builder) void {"},{"Add":" // Standard target options allows the person running `zig build` to choose"},{"Add":" // what target to build for. Here we do not override the defaults, which"},{"Add":" // means any target is allowed, and the default is native. Other options"},{"Add":" // for restricting supported target set are available."},{"Add":" const target = b.standardTargetOptions(.{});"},{"Add":""},{"Add":" // Standard release options allow the person running `zig build` to select"},{"Add":" // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall."},{"Add":" const mode = b.standardReleaseOptions();"},{"Add":""},{"Add":" const exe = b.addExecutable(\"pistike\", \"src/main.zig\");"},{"Add":" exe.setTarget(target);"},{"Add":" exe.setBuildMode(mode);"},{"Add":" exe.install();"},{"Add":""},{"Add":" const run_cmd = exe.run();"},{"Add":" run_cmd.step.dependOn(b.getInstallStep());"},{"Add":" if (b.args) |args| {"},{"Add":" run_cmd.addArgs(args);"},{"Add":" }"},{"Add":""},{"Add":" const run_step = b.step(\"run\", \"Run the app\");"},{"Add":" run_step.dependOn(&run_cmd.step);"},{"Add":""},{"Add":" const exe_tests = b.addTest(\"src/main.zig\");"},{"Add":" exe_tests.setTarget(target);"},{"Add":" exe_tests.setBuildMode(mode);"},{"Add":""},{"Add":" const test_step = b.step(\"test\", \"Run unit tests\");"},{"Add":" test_step.dependOn(&exe_tests.step);"},{"Add":"}"}]}}],"owner":"voroskoi","repo":"pistike","token":"6f7SonUp434TU0rkACxwK5BiyRySRDhIZRVIl5x/zv8=","login":null}

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