From df8253dbf6cb09093018333f99dd9c19ba0ff02b Mon Sep 17 00:00:00 2001 From: Daniel Smith Date: Sat, 28 Nov 2020 21:24:40 -0500 Subject: Initial commit `Tokenizer` can _just barely_ parse a basic, well-formed move list. Initially, I wanted to provide the movetext as a `Stream` rather than a string, the idea being that it could be processed as it was being read from a file without having to read the entire file into memory first. I had difficulties with the stream being unreadable in `Tokenizer.ParseMoves()`, so I switched to a string in order to get the actual parsing logic down first. Because of the `yield return` strategy, the debug console output includes all of the expected halfmoves multiple times in various orders. After running a test, generally the full, in-order list seems to exist at the bottom of the output. --- .gitignore | 363 +++++++++++++++++++++++++++++++++++ .vscode/launch.json | 27 +++ .vscode/tasks.json | 42 ++++ DotnetPgn.Test/DotnetPgn.Test.csproj | 26 +++ DotnetPgn.Test/PieceParserTest.cs | 17 ++ DotnetPgn.Test/TokenizerTest.cs | 82 ++++++++ DotnetPgn.sln | 48 +++++ DotnetPgn/DotnetPgn.csproj | 7 + DotnetPgn/Models/Enums.cs | 18 ++ DotnetPgn/Models/HalfMove.cs | 11 ++ DotnetPgn/Models/Square.cs | 22 +++ DotnetPgn/PieceParser.cs | 22 +++ DotnetPgn/Tokenizer.cs | 75 ++++++++ 13 files changed, 760 insertions(+) create mode 100644 .gitignore create mode 100644 .vscode/launch.json create mode 100644 .vscode/tasks.json create mode 100644 DotnetPgn.Test/DotnetPgn.Test.csproj create mode 100644 DotnetPgn.Test/PieceParserTest.cs create mode 100644 DotnetPgn.Test/TokenizerTest.cs create mode 100644 DotnetPgn.sln create mode 100644 DotnetPgn/DotnetPgn.csproj create mode 100644 DotnetPgn/Models/Enums.cs create mode 100644 DotnetPgn/Models/HalfMove.cs create mode 100644 DotnetPgn/Models/Square.cs create mode 100644 DotnetPgn/PieceParser.cs create mode 100644 DotnetPgn/Tokenizer.cs diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..3524b8a --- /dev/null +++ b/.gitignore @@ -0,0 +1,363 @@ +## Ignore Visual Studio temporary files, build results, and +## files generated by popular Visual Studio add-ons. +## +## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore + +# User-specific files +*.rsuser +*.suo +*.user +*.userosscache +*.sln.docstates + +# User-specific files (MonoDevelop/Xamarin Studio) +*.userprefs + +# Mono auto generated files +mono_crash.* + +# Build results +[Dd]ebug/ +[Dd]ebugPublic/ +[Rr]elease/ +[Rr]eleases/ +x64/ +x86/ +[Ww][Ii][Nn]32/ +[Aa][Rr][Mm]/ +[Aa][Rr][Mm]64/ +bld/ +[Bb]in/ +[Oo]bj/ +[Ll]og/ +[Ll]ogs/ + +# Visual Studio 2015/2017 cache/options directory +.vs/ +# Uncomment if you have tasks that create the project's static files in wwwroot +#wwwroot/ + +# Visual Studio 2017 auto generated files +Generated\ Files/ + +# MSTest test Results +[Tt]est[Rr]esult*/ +[Bb]uild[Ll]og.* + +# NUnit +*.VisualState.xml +TestResult.xml +nunit-*.xml + +# Build Results of an ATL Project +[Dd]ebugPS/ +[Rr]eleasePS/ +dlldata.c + +# Benchmark Results +BenchmarkDotNet.Artifacts/ + +# .NET Core +project.lock.json +project.fragment.lock.json +artifacts/ + +# ASP.NET Scaffolding +ScaffoldingReadMe.txt + +# StyleCop +StyleCopReport.xml + +# Files built by Visual Studio +*_i.c +*_p.c +*_h.h +*.ilk +*.meta +*.obj +*.iobj +*.pch +*.pdb +*.ipdb +*.pgc +*.pgd +*.rsp +*.sbr +*.tlb +*.tli +*.tlh +*.tmp +*.tmp_proj +*_wpftmp.csproj +*.log +*.vspscc +*.vssscc +.builds +*.pidb +*.svclog +*.scc + +# Chutzpah Test files +_Chutzpah* + +# Visual C++ cache files +ipch/ +*.aps +*.ncb +*.opendb +*.opensdf +*.sdf +*.cachefile +*.VC.db +*.VC.VC.opendb + +# Visual Studio profiler +*.psess +*.vsp +*.vspx +*.sap + +# Visual Studio Trace Files +*.e2e + +# TFS 2012 Local Workspace +$tf/ + +# Guidance Automation Toolkit +*.gpState + +# ReSharper is a .NET coding add-in +_ReSharper*/ +*.[Rr]e[Ss]harper +*.DotSettings.user + +# TeamCity is a build add-in +_TeamCity* + +# DotCover is a Code Coverage Tool +*.dotCover + +# AxoCover is a Code Coverage Tool +.axoCover/* +!.axoCover/settings.json + +# Coverlet is a free, cross platform Code Coverage Tool +coverage*.json +coverage*.xml +coverage*.info + +# Visual Studio code coverage results +*.coverage +*.coveragexml + +# NCrunch +_NCrunch_* +.*crunch*.local.xml +nCrunchTemp_* + +# MightyMoose +*.mm.* +AutoTest.Net/ + +# Web workbench (sass) +.sass-cache/ + +# Installshield output folder +[Ee]xpress/ + +# DocProject is a documentation generator add-in +DocProject/buildhelp/ +DocProject/Help/*.HxT +DocProject/Help/*.HxC +DocProject/Help/*.hhc +DocProject/Help/*.hhk +DocProject/Help/*.hhp +DocProject/Help/Html2 +DocProject/Help/html + +# Click-Once directory +publish/ + +# Publish Web Output +*.[Pp]ublish.xml +*.azurePubxml +# Note: Comment the next line if you want to checkin your web deploy settings, +# but database connection strings (with potential passwords) will be unencrypted +*.pubxml +*.publishproj + +# Microsoft Azure Web App publish settings. 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build; native; contentfiles; analyzers; buildtransitive + all + + + runtime; build; native; contentfiles; analyzers; buildtransitive + all + + + + + + + + diff --git a/DotnetPgn.Test/PieceParserTest.cs b/DotnetPgn.Test/PieceParserTest.cs new file mode 100644 index 0000000..e8aacf6 --- /dev/null +++ b/DotnetPgn.Test/PieceParserTest.cs @@ -0,0 +1,17 @@ +using System.Linq; +using DotnetPgn.Models; +using Xunit; + +namespace DotnetPgn.Test +{ + public class PieceParserTest + { + [Theory] + [InlineData("K", Piece.King)] + [InlineData("Q", Piece.Queen)] + public void ParsePieceTest(string input, Piece expectedOutput) + { + Assert.Equal(expectedOutput, PieceParser.ParsePiece(input)); + } + } +} diff --git a/DotnetPgn.Test/TokenizerTest.cs b/DotnetPgn.Test/TokenizerTest.cs new file mode 100644 index 0000000..cb9940b --- /dev/null +++ b/DotnetPgn.Test/TokenizerTest.cs @@ -0,0 +1,82 @@ +using System; +using System.Collections.Generic; +using System.IO; +using System.Linq; +using DotnetPgn.Models; +using Xunit; + +namespace DotnetPgn.Test +{ + public class TokenizerTest + { + [Fact] + public void ParseMovesTest() + { + var moveText = "1. e4 e5 2. Nf3 Qe7 3. d3 h5\n"; + IEnumerable halfmoves; + + #region Expected + List expectedHalfMoves = new() + { + new HalfMove + { + MoveNumber = 1, + Player = Player.White, + Piece = Piece.Pawn, + TargetSquare = new Square('e', 4), + }, + new HalfMove + { + MoveNumber = 1, + Player = Player.Black, + Piece = Piece.Pawn, + TargetSquare = new Square('e', 5), + }, + new HalfMove + { + MoveNumber = 2, + Player = Player.White, + Piece = Piece.Knight, + TargetSquare = new Square('f', 3), + }, + new HalfMove + { + MoveNumber = 2, + Player = Player.Black, + Piece = Piece.Queen, + TargetSquare = new Square('e', 7), + }, + new HalfMove + { + MoveNumber = 3, + Player = Player.White, + Piece = Piece.Pawn, + TargetSquare = new Square('d', 3), + }, + new HalfMove + { + MoveNumber = 3, + Player = Player.Black, + Piece = Piece.Pawn, + TargetSquare = new Square('h', 5), + }, + }; + #endregion + + halfmoves = Tokenizer.ParseMoves(moveText); + + for (int i = 0; i < expectedHalfMoves.Count(); i++) + { + HalfMove generated = halfmoves.ElementAtOrDefault(i); + HalfMove expected = expectedHalfMoves.ElementAtOrDefault(i); + + Assert.NotNull(generated); + Assert.NotNull(expected); + Assert.Equal(expected.MoveNumber, generated.MoveNumber); + Assert.Equal(expected.Player, generated.Player); + Assert.Equal(expected.Piece, generated.Piece); + Assert.Equal(expected.TargetSquare, generated.TargetSquare); + } + } + } +} diff --git a/DotnetPgn.sln b/DotnetPgn.sln new file mode 100644 index 0000000..53fe2ce --- /dev/null +++ b/DotnetPgn.sln @@ -0,0 +1,48 @@ + +Microsoft Visual Studio Solution File, Format Version 12.00 +# Visual Studio 15 +VisualStudioVersion = 15.0.26124.0 +MinimumVisualStudioVersion = 15.0.26124.0 +Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DotnetPgn", "DotnetPgn\DotnetPgn.csproj", "{94582A40-22EF-4884-A2CE-6F08E08776E8}" +EndProject +Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DotnetPgn.Test", "DotnetPgn.Test\DotnetPgn.Test.csproj", "{F1ED5B4D-EC5B-4720-A877-B2CE895BD3B7}" +EndProject +Global + GlobalSection(SolutionConfigurationPlatforms) = preSolution + Debug|Any CPU = Debug|Any CPU + Debug|x64 = Debug|x64 + Debug|x86 = Debug|x86 + Release|Any CPU = Release|Any CPU + Release|x64 = Release|x64 + Release|x86 = Release|x86 + EndGlobalSection + GlobalSection(SolutionProperties) = preSolution + HideSolutionNode = FALSE + EndGlobalSection + GlobalSection(ProjectConfigurationPlatforms) = postSolution + {94582A40-22EF-4884-A2CE-6F08E08776E8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU + {94582A40-22EF-4884-A2CE-6F08E08776E8}.Debug|Any CPU.Build.0 = Debug|Any CPU + {94582A40-22EF-4884-A2CE-6F08E08776E8}.Debug|x64.ActiveCfg = Debug|Any CPU + {94582A40-22EF-4884-A2CE-6F08E08776E8}.Debug|x64.Build.0 = Debug|Any CPU + {94582A40-22EF-4884-A2CE-6F08E08776E8}.Debug|x86.ActiveCfg = Debug|Any CPU + {94582A40-22EF-4884-A2CE-6F08E08776E8}.Debug|x86.Build.0 = Debug|Any CPU + {94582A40-22EF-4884-A2CE-6F08E08776E8}.Release|Any CPU.ActiveCfg = Release|Any CPU + {94582A40-22EF-4884-A2CE-6F08E08776E8}.Release|Any CPU.Build.0 = Release|Any CPU + {94582A40-22EF-4884-A2CE-6F08E08776E8}.Release|x64.ActiveCfg = Release|Any CPU + {94582A40-22EF-4884-A2CE-6F08E08776E8}.Release|x64.Build.0 = Release|Any CPU + {94582A40-22EF-4884-A2CE-6F08E08776E8}.Release|x86.ActiveCfg = Release|Any CPU + {94582A40-22EF-4884-A2CE-6F08E08776E8}.Release|x86.Build.0 = Release|Any CPU + {F1ED5B4D-EC5B-4720-A877-B2CE895BD3B7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU + {F1ED5B4D-EC5B-4720-A877-B2CE895BD3B7}.Debug|Any CPU.Build.0 = Debug|Any CPU + {F1ED5B4D-EC5B-4720-A877-B2CE895BD3B7}.Debug|x64.ActiveCfg = Debug|Any CPU + {F1ED5B4D-EC5B-4720-A877-B2CE895BD3B7}.Debug|x64.Build.0 = Debug|Any CPU + {F1ED5B4D-EC5B-4720-A877-B2CE895BD3B7}.Debug|x86.ActiveCfg = Debug|Any CPU + {F1ED5B4D-EC5B-4720-A877-B2CE895BD3B7}.Debug|x86.Build.0 = Debug|Any CPU + {F1ED5B4D-EC5B-4720-A877-B2CE895BD3B7}.Release|Any CPU.ActiveCfg = Release|Any CPU + {F1ED5B4D-EC5B-4720-A877-B2CE895BD3B7}.Release|Any CPU.Build.0 = Release|Any CPU + {F1ED5B4D-EC5B-4720-A877-B2CE895BD3B7}.Release|x64.ActiveCfg = Release|Any CPU + {F1ED5B4D-EC5B-4720-A877-B2CE895BD3B7}.Release|x64.Build.0 = Release|Any CPU + {F1ED5B4D-EC5B-4720-A877-B2CE895BD3B7}.Release|x86.ActiveCfg = Release|Any CPU + {F1ED5B4D-EC5B-4720-A877-B2CE895BD3B7}.Release|x86.Build.0 = Release|Any CPU + EndGlobalSection +EndGlobal diff --git a/DotnetPgn/DotnetPgn.csproj b/DotnetPgn/DotnetPgn.csproj new file mode 100644 index 0000000..563e6f9 --- /dev/null +++ b/DotnetPgn/DotnetPgn.csproj @@ -0,0 +1,7 @@ + + + + net5.0 + + + diff --git a/DotnetPgn/Models/Enums.cs b/DotnetPgn/Models/Enums.cs new file mode 100644 index 0000000..893f2fa --- /dev/null +++ b/DotnetPgn/Models/Enums.cs @@ -0,0 +1,18 @@ +namespace DotnetPgn.Models +{ + public enum Piece + { + Pawn, + Knight, + Bishop, + Rook, + Queen, + King, + } + + public enum Player + { + White, + Black, + } +} \ No newline at end of file diff --git a/DotnetPgn/Models/HalfMove.cs b/DotnetPgn/Models/HalfMove.cs new file mode 100644 index 0000000..b94d77d --- /dev/null +++ b/DotnetPgn/Models/HalfMove.cs @@ -0,0 +1,11 @@ +namespace DotnetPgn.Models +{ + public record HalfMove + { + public int MoveNumber {get; init;} + public Player Player { get; init; } + public Piece Piece { get; init; } + public Square SourceSquare { get; init; } + public Square TargetSquare { get; init; } + } +} \ No newline at end of file diff --git a/DotnetPgn/Models/Square.cs b/DotnetPgn/Models/Square.cs new file mode 100644 index 0000000..a3910d3 --- /dev/null +++ b/DotnetPgn/Models/Square.cs @@ -0,0 +1,22 @@ +using System; + +namespace DotnetPgn.Models +{ + public record Square + { + public char Rank { get; } + public int File { get; } + + public Square(char rank, int file) + { + if (rank < 'a' || rank > 'h') + throw new ArgumentException($"Invalid rank '{rank}'."); + + if (file < 1 || file > 8) + throw new ArgumentException($"Invalid file '{file}'."); + + Rank = rank; + File = file; + } + } +} \ No newline at end of file diff --git a/DotnetPgn/PieceParser.cs b/DotnetPgn/PieceParser.cs new file mode 100644 index 0000000..5ea9402 --- /dev/null +++ b/DotnetPgn/PieceParser.cs @@ -0,0 +1,22 @@ +using System; +using DotnetPgn.Models; + +namespace DotnetPgn +{ + public static class PieceParser + { + public static Piece ParsePiece(string sanPiece) + { + return sanPiece switch + { + "P" or "p" or "" => Piece.Pawn, + "N" or "n" => Piece.Knight, + "B" or "b" => Piece.Bishop, + "R" or "r" => Piece.Rook, + "Q" or "q" => Piece.Queen, + "K" or "k" => Piece.King, + _ => throw new ArgumentException($"'{sanPiece} is not a valid piece.'"), + }; + } + } +} diff --git a/DotnetPgn/Tokenizer.cs b/DotnetPgn/Tokenizer.cs new file mode 100644 index 0000000..9f779cb --- /dev/null +++ b/DotnetPgn/Tokenizer.cs @@ -0,0 +1,75 @@ +using System; +using System.Collections.Generic; +using System.IO; +using System.Text; +using System.Text.RegularExpressions; +using DotnetPgn.Models; + +namespace DotnetPgn +{ + public static class Tokenizer + { + private static readonly Regex s_halfMoveRegex = + new(@"([KQRBNP]?)([a-h]?[1-8]?)(x?)([a-h][1-8])([+#]?)"); + + public static IEnumerable ParseMoves(string moveText) + { + StringBuilder currToken = new(); + char[] moveTextChars = moveText.ToCharArray(); + int moveNumber = 1; + Player currPlayer = Player.White; + + for (int i = 0; i < moveTextChars.Length; i++) + { + char nextChar = moveTextChars[i]; + + if (nextChar is ' ' or '\t' or '\n' or '\r') + { + // We should have either a move number or a complete halfmove. + string token = currToken.ToString(); + currToken.Clear(); + Match match = s_halfMoveRegex.Match(token); + + if (!match.Success) + { + Console.WriteLine($"Unrecognized token: `{token}`"); + Console.WriteLine(); + continue; + } + + Console.WriteLine($"Recognized token: {token}"); + Console.WriteLine($"Matching groups: ({match.Groups[1].Value})" + + $"({match.Groups[2].Value})({match.Groups[3].Value})({match.Groups[4].Value})" + + $"({match.Groups[5].Value})"); + + var move = new HalfMove + { + MoveNumber = moveNumber, + Player = currPlayer, + Piece = PieceParser.ParsePiece(match.Groups[1].Value), + TargetSquare = new Square(match.Groups[4].Value[0], Convert.ToInt32(Char.GetNumericValue(match.Groups[4].Value[1]))), + }; + + Console.WriteLine($"Halfmove: {move.MoveNumber}. {move.Player} {move.Piece} from {move.SourceSquare} to {move.TargetSquare}"); + Console.WriteLine(); + + if (currPlayer == Player.White) + { + currPlayer = Player.Black; + } + else + { + currPlayer = Player.White; + moveNumber++; + } + + yield return move; + } + else + { + currToken.Append(nextChar); + } + } + } + } +} \ No newline at end of file -- cgit v1.2.3