Initial commit

checkpoint only

.gitignore

@@ -0,0 +1,407 @@
+## 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/main/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/
+[Aa][Rr][Mm]64[Ee][Cc]/
+bld/
+[Bb]in/
+[Oo]bj/
+[Oo]ut/
+[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
+
+# Approval Tests result files
+*.received.*
+
+# 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
+*.idb
+*.iobj
+*.pch
+*.pdb
+*.ipdb
+*.pgc
+*.pgd
+*.rsp
+# but not Directory.Build.rsp, as it configures directory-level build defaults
+!Directory.Build.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.tlog
+*.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_*
+.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. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# NuGet Symbol Packages
+*.snupkg
+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+*.appxbundle
+*.appxupload
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!?*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
+#*.snk
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+ServiceFabricBackup/
+*.rptproj.bak
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+*.rptproj.rsuser
+*- [Bb]ackup.rdl
+*- [Bb]ackup ([0-9]).rdl
+*- [Bb]ackup ([0-9][0-9]).rdl
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
+# Visual Studio 6 auto-generated project file (contains which files were open etc.)
+*.vbp
+
+# Visual Studio 6 workspace and project file (working project files containing files to include in project)
+*.dsw
+*.dsp
+
+# Visual Studio 6 technical files
+*.ncb
+*.aps
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# CodeRush personal settings
+.cr/personal
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# OpenCover UI analysis results
+OpenCover/
+
+# Azure Stream Analytics local run output
+ASALocalRun/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# AWS SAM Build and Temporary Artifacts folder
+.aws-sam
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/
+
+# Visual Studio History (VSHistory) files
+.vshistory/
+
+# BeatPulse healthcheck temp database
+healthchecksdb
+
+# Backup folder for Package Reference Convert tool in Visual Studio 2017
+MigrationBackup/
+
+# Ionide (cross platform F# VS Code tools) working folder
+.ionide/
+
+# Fody - auto-generated XML schema
+FodyWeavers.xsd
+
+# VS Code files for those working on multiple tools
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+*.code-workspace
+
+# Local History for Visual Studio Code
+.history/
+
+# Windows Installer files from build outputs
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp

src/.config/dotnet-tools.json

@@ -0,0 +1,13 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "cocor": {
+      "version": "2014.12.25",
+      "commands": [
+        "coco"
+      ],
+      "rollForward": false
+    }
+  }
+}

src/core/FunctionArgument.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace csmic
+{
+    public class FunctionArgument
+    {
+        public required string Name { get; set; }
+        public required FunctionValue Value { get; set; }
+    }
+}

src/core/FunctionValue.cs

@@ -0,0 +1,15 @@
+using csmic;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace csmic
+{
+    public class FunctionValue
+    {
+        public required csmic.ValueType Type { get; set; }
+        public object? Value { get; set; }
+    }
+}

src/core/ICodedFunction.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace csmic
+{
+    public interface ICodedFunction
+    {
+        #region Properties
+
+        IEnumerable<FunctionArgument> ExpectedArguments { get; }
+
+        #endregion
+
+        #region Methods
+
+        FunctionValue Execute(params FunctionArgument[] args);
+
+        #endregion
+    }
+}

src/core/InputInterpreter.cs

@@ -0,0 +1,7 @@
+namespace csmic
+{
+    public class InputInterpreter
+    {
+
+    }
+}

src/core/ValueType.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace csmic
+{
+    public enum ValueType
+    {
+        None,
+        Numeric,
+        String
+    }
+}

src/core/cocor/Interpreter.atg

@@ -0,0 +1,143 @@
+using csmic;
+using System.Text;
+using System.Collections.Generic;
+
+COMPILER INTERPRETER
+
+/*
+*
+*	Class Structures
+*
+*/
+
+private decimal calcValue = 0;
+private string stringValue = string.Empty;
+
+public decimal CalculatedValue
+{
+	get
+	{
+		return this.calcValue;
+	}
+	set
+	{
+		this.calcValue = value;
+	}
+}
+
+public string StringValue
+{
+	get
+	{
+		return this.stringValue
+	}
+	set
+	{
+		this.stringValue = value
+	}
+}
+
+private InputInterpreter interpreter = null;
+
+public InputInterpreter Interpreter
+{
+	get
+	{
+		return this.interpreter;
+	}
+	set
+	{
+		this.interpreter = value;
+	}
+}
+
+bool IsFunctionCall()  
+{
+  scanner.ResetPeek();
+  Token next = scanner.Peek();
+  if (next.kind == _LPAREN && la.kind == _identifier)
+    return true;
+  return false;
+}
+
+bool IsCompare()  
+{
+  scanner.ResetPeek();
+  Token next = scanner.Peek();
+  if (next.kind == _COMPARER)
+    return true;
+  return false;
+}
+
+bool IsAssignment()  
+{
+  scanner.ResetPeek();
+  Token next = scanner.Peek();
+  if (next.val == "::" || next.val == ":=" || next.val == "->")
+    return true;
+  return false;
+}
+
+bool IsArrayCall()
+{
+	scanner.ResetPeek();
+	Token next = scanner.Peek();
+	if(next.val == "[")
+		return true;
+	return false;
+}
+
+/*
+ *	Parser definitions
+ *
+ */
+
+CHARACTERS
+
+	UpperLetter = 'A'..'Z'.
+	LowerLetter = 'a'..'z'.
+	letter = UpperLetter + LowerLetter.
+	digit = "0123456789" .
+	cr     = '\r' .
+	lf     = '\n' .
+	tab    = '\t' .
+	PM	   = "+-" .
+	NoQuote = ANY - '\"' .
+	
+TOKENS
+
+	identifier = letter { letter | digit}.
+	sign = PM .
+	binary = ( '0' | '1' ) { '0' | '1' } ('B' | 'b') .
+	hex = "0x" ( digit | ('A' | 'B' | 'C' | 'D' | 'E' |'F') | ('a' | 'b' | 'c' | 'd' | 'e' |'f') ) { digit | ('A' | 'B' | 'C' | 'D' | 'E' |'F') | ('a' | 'b' | 'c' | 'd' | 'e' |'f') } .
+	number = digit { digit }['.' {digit}] [('E'|'e')['+'|'-'] digit {digit}] .
+	string = "\"" { NoQuote } "\"" .
+	LPAREN = '(' .
+	RPAREN = ')' .
+	COMPARER = "==" | "<" | ">" | "<=" | ">=" .
+  
+IGNORE cr + tab
+
+/*
+ *	Parser specification
+ *
+ */
+
+ PRODUCTIONS
+
+ INTERPRETER								(.
+												decimal decimalValue = 0;
+												string stringValue = string.Empty;
+												bool success = true;
+												if(this.interpreter == null)
+												{
+													return;
+												}
+											.)
+=
+
+	IF(IsCompare())
+	Comparison<out success>					(. this.calcValue = (success == true) ? 1 : 0; .)
+	|
+	IF(IsAssignment())
+	Assignment<out r>

src/core/cocor/Parser.frame

@@ -0,0 +1,156 @@
+/*----------------------------------------------------------------------
+Compiler Generator Coco/R,
+Copyright (c) 1990, 2004 Hanspeter Moessenboeck, University of Linz
+extended by M. Loeberbauer & A. Woess, Univ. of Linz
+with improvements by Pat Terry, Rhodes University
+
+This program is free software; you can redistribute it and/or modify it 
+under the terms of the GNU General Public License as published by the 
+Free Software Foundation; either version 2, or (at your option) any 
+later version.
+
+This program is distributed in the hope that it will be useful, but 
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
+or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License 
+for more details.
+
+You should have received a copy of the GNU General Public License along 
+with this program; if not, write to the Free Software Foundation, Inc., 
+59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+As an exception, it is allowed to write an extension of Coco/R that is
+used as a plugin in non-free software.
+
+If not otherwise stated, any source code generated by Coco/R (other than 
+Coco/R itself) does not fall under the GNU General Public License.
+----------------------------------------------------------------------*/
+-->begin
+using System;
+
+-->namespace
+
+public class Parser {
+-->constants
+	const bool _T = true;
+	const bool _x = false;
+	const int minErrDist = 2;
+	
+	public Scanner scanner;
+	public Errors  errors;
+
+	public Token t;    // last recognized token
+	public Token la;   // lookahead token
+	int errDist = minErrDist;
+
+-->declarations
+
+	public Parser(Scanner scanner) {
+		this.scanner = scanner;
+		errors = new Errors();
+	}
+
+	void SynErr (int n) {
+		if (errDist >= minErrDist) errors.SynErr(la.line, la.col, n);
+		errDist = 0;
+	}
+
+	public void SemErr (string msg) {
+		if (errDist >= minErrDist) errors.SemErr(t.line, t.col, msg);
+		errDist = 0;
+	}
+	
+	void Get () {
+		for (;;) {
+			t = la;
+			la = scanner.Scan();
+			if (la.kind <= maxT) { ++errDist; break; }
+-->pragmas
+			la = t;
+		}
+	}
+	
+	void Expect (int n) {
+		if (la.kind==n) Get(); else { SynErr(n); }
+	}
+	
+	bool StartOf (int s) {
+		return set[s, la.kind];
+	}
+	
+	void ExpectWeak (int n, int follow) {
+		if (la.kind == n) Get();
+		else {
+			SynErr(n);
+			while (!StartOf(follow)) Get();
+		}
+	}
+
+
+	bool WeakSeparator(int n, int syFol, int repFol) {
+		int kind = la.kind;
+		if (kind == n) {Get(); return true;}
+		else if (StartOf(repFol)) {return false;}
+		else {
+			SynErr(n);
+			while (!(set[syFol, kind] || set[repFol, kind] || set[0, kind])) {
+				Get();
+				kind = la.kind;
+			}
+			return StartOf(syFol);
+		}
+	}
+
+	
+-->productions
+
+	public void Parse() {
+		la = new Token();
+		la.val = "";		
+		Get();
+-->parseRoot
+	}
+	
+	static readonly bool[,] set = {
+-->initialization
+	};
+} // end Parser
+
+
+public class Errors {
+	public int count = 0;                                    // number of errors detected
+	public System.IO.TextWriter errorStream = Console.Out;   // error messages go to this stream
+	public string errMsgFormat = "-- line {0} col {1}: {2}"; // 0=line, 1=column, 2=text
+
+	public virtual void SynErr (int line, int col, int n) {
+		string s;
+		switch (n) {
+-->errors
+			default: s = "error " + n; break;
+		}
+		errorStream.WriteLine(errMsgFormat, line, col, s);
+		count++;
+	}
+
+	public virtual void SemErr (int line, int col, string s) {
+		errorStream.WriteLine(errMsgFormat, line, col, s);
+		count++;
+	}
+	
+	public virtual void SemErr (string s) {
+		errorStream.WriteLine(s);
+		count++;
+	}
+	
+	public virtual void Warning (int line, int col, string s) {
+		errorStream.WriteLine(errMsgFormat, line, col, s);
+	}
+	
+	public virtual void Warning(string s) {
+		errorStream.WriteLine(s);
+	}
+} // Errors
+
+
+public class FatalError: Exception {
+	public FatalError(string m): base(m) {}
+}

src/core/cocor/Scanner.frame

@@ -0,0 +1,381 @@
+/*----------------------------------------------------------------------
+Compiler Generator Coco/R,
+Copyright (c) 1990, 2004 Hanspeter Moessenboeck, University of Linz
+extended by M. Loeberbauer & A. Woess, Univ. of Linz
+with improvements by Pat Terry, Rhodes University
+
+This program is free software; you can redistribute it and/or modify it 
+under the terms of the GNU General Public License as published by the 
+Free Software Foundation; either version 2, or (at your option) any 
+later version.
+
+This program is distributed in the hope that it will be useful, but 
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
+or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License 
+for more details.
+
+You should have received a copy of the GNU General Public License along 
+with this program; if not, write to the Free Software Foundation, Inc., 
+59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+As an exception, it is allowed to write an extension of Coco/R that is
+used as a plugin in non-free software.
+
+If not otherwise stated, any source code generated by Coco/R (other than 
+Coco/R itself) does not fall under the GNU General Public License.
+-----------------------------------------------------------------------*/
+-->begin
+using System;
+using System.IO;
+using System.Collections;
+
+-->namespace
+
+public class Token {
+	public int kind;    // token kind
+	public int pos;     // token position in bytes in the source text (starting at 0)
+	public int charPos;  // token position in characters in the source text (starting at 0)
+	public int col;     // token column (starting at 1)
+	public int line;    // token line (starting at 1)
+	public string val;  // token value
+	public Token next;  // ML 2005-03-11 Tokens are kept in linked list
+}
+
+//-----------------------------------------------------------------------------------
+// Buffer
+//-----------------------------------------------------------------------------------
+public class Buffer {
+	// This Buffer supports the following cases:
+	// 1) seekable stream (file)
+	//    a) whole stream in buffer
+	//    b) part of stream in buffer
+	// 2) non seekable stream (network, console)
+
+	public const int EOF = char.MaxValue + 1;
+	const int MIN_BUFFER_LENGTH = 1024; // 1KB
+	const int MAX_BUFFER_LENGTH = MIN_BUFFER_LENGTH * 64; // 64KB
+	byte[] buf;         // input buffer
+	int bufStart;       // position of first byte in buffer relative to input stream
+	int bufLen;         // length of buffer
+	int fileLen;        // length of input stream (may change if the stream is no file)
+	int bufPos;         // current position in buffer
+	Stream stream;      // input stream (seekable)
+	bool isUserStream;  // was the stream opened by the user?
+	
+	public Buffer (Stream s, bool isUserStream) {
+		stream = s; this.isUserStream = isUserStream;
+		
+		if (stream.CanSeek) {
+			fileLen = (int) stream.Length;
+			bufLen = Math.Min(fileLen, MAX_BUFFER_LENGTH);
+			bufStart = Int32.MaxValue; // nothing in the buffer so far
+		} else {
+			fileLen = bufLen = bufStart = 0;
+		}
+
+		buf = new byte[(bufLen>0) ? bufLen : MIN_BUFFER_LENGTH];
+		if (fileLen > 0) Pos = 0; // setup buffer to position 0 (start)
+		else bufPos = 0; // index 0 is already after the file, thus Pos = 0 is invalid
+		if (bufLen == fileLen && stream.CanSeek) Close();
+	}
+	
+	protected Buffer(Buffer b) { // called in UTF8Buffer constructor
+		buf = b.buf;
+		bufStart = b.bufStart;
+		bufLen = b.bufLen;
+		fileLen = b.fileLen;
+		bufPos = b.bufPos;
+		stream = b.stream;
+		// keep destructor from closing the stream
+		b.stream = null;
+		isUserStream = b.isUserStream;
+	}
+
+	~Buffer() { Close(); }
+	
+	protected void Close() {
+		if (!isUserStream && stream != null) {
+			stream.Close();
+			stream = null;
+		}
+	}
+	
+	public virtual int Read () {
+		if (bufPos < bufLen) {
+			return buf[bufPos++];
+		} else if (Pos < fileLen) {
+			Pos = Pos; // shift buffer start to Pos
+			return buf[bufPos++];
+		} else if (stream != null && !stream.CanSeek && ReadNextStreamChunk() > 0) {
+			return buf[bufPos++];
+		} else {
+			return EOF;
+		}
+	}
+
+	public int Peek () {
+		int curPos = Pos;
+		int ch = Read();
+		Pos = curPos;
+		return ch;
+	}
+	
+	// beg .. begin, zero-based, inclusive, in byte
+	// end .. end, zero-based, exclusive, in byte
+	public string GetString (int beg, int end) {
+		int len = 0;
+		char[] buf = new char[end - beg];
+		int oldPos = Pos;
+		Pos = beg;
+		while (Pos < end) buf[len++] = (char) Read();
+		Pos = oldPos;
+		return new String(buf, 0, len);
+	}
+
+	public int Pos {
+		get { return bufPos + bufStart; }
+		set {
+			if (value >= fileLen && stream != null && !stream.CanSeek) {
+				// Wanted position is after buffer and the stream
+				// is not seek-able e.g. network or console,
+				// thus we have to read the stream manually till
+				// the wanted position is in sight.
+				while (value >= fileLen && ReadNextStreamChunk() > 0);
+			}
+
+			if (value < 0 || value > fileLen) {
+				throw new FatalError("buffer out of bounds access, position: " + value);
+			}
+
+			if (value >= bufStart && value < bufStart + bufLen) { // already in buffer
+				bufPos = value - bufStart;
+			} else if (stream != null) { // must be swapped in
+				stream.Seek(value, SeekOrigin.Begin);
+				bufLen = stream.Read(buf, 0, buf.Length);
+				bufStart = value; bufPos = 0;
+			} else {
+				// set the position to the end of the file, Pos will return fileLen.
+				bufPos = fileLen - bufStart;
+			}
+		}
+	}
+	
+	// Read the next chunk of bytes from the stream, increases the buffer
+	// if needed and updates the fields fileLen and bufLen.
+	// Returns the number of bytes read.
+	private int ReadNextStreamChunk() {
+		int free = buf.Length - bufLen;
+		if (free == 0) {
+			// in the case of a growing input stream
+			// we can neither seek in the stream, nor can we
+			// foresee the maximum length, thus we must adapt
+			// the buffer size on demand.
+			byte[] newBuf = new byte[bufLen * 2];
+			Array.Copy(buf, newBuf, bufLen);
+			buf = newBuf;
+			free = bufLen;
+		}
+		int read = stream.Read(buf, bufLen, free);
+		if (read > 0) {
+			fileLen = bufLen = (bufLen + read);
+			return read;
+		}
+		// end of stream reached
+		return 0;
+	}
+}
+
+//-----------------------------------------------------------------------------------
+// UTF8Buffer
+//-----------------------------------------------------------------------------------
+public class UTF8Buffer: Buffer {
+	public UTF8Buffer(Buffer b): base(b) {}
+
+	public override int Read() {
+		int ch;
+		do {
+			ch = base.Read();
+			// until we find a utf8 start (0xxxxxxx or 11xxxxxx)
+		} while ((ch >= 128) && ((ch & 0xC0) != 0xC0) && (ch != EOF));
+		if (ch < 128 || ch == EOF) {
+			// nothing to do, first 127 chars are the same in ascii and utf8
+			// 0xxxxxxx or end of file character
+		} else if ((ch & 0xF0) == 0xF0) {
+			// 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+			int c1 = ch & 0x07; ch = base.Read();
+			int c2 = ch & 0x3F; ch = base.Read();
+			int c3 = ch & 0x3F; ch = base.Read();
+			int c4 = ch & 0x3F;
+			ch = (((((c1 << 6) | c2) << 6) | c3) << 6) | c4;
+		} else if ((ch & 0xE0) == 0xE0) {
+			// 1110xxxx 10xxxxxx 10xxxxxx
+			int c1 = ch & 0x0F; ch = base.Read();
+			int c2 = ch & 0x3F; ch = base.Read();
+			int c3 = ch & 0x3F;
+			ch = (((c1 << 6) | c2) << 6) | c3;
+		} else if ((ch & 0xC0) == 0xC0) {
+			// 110xxxxx 10xxxxxx
+			int c1 = ch & 0x1F; ch = base.Read();
+			int c2 = ch & 0x3F;
+			ch = (c1 << 6) | c2;
+		}
+		return ch;
+	}
+}
+
+//-----------------------------------------------------------------------------------
+// Scanner
+//-----------------------------------------------------------------------------------
+public class Scanner {
+	const char EOL = '\n';
+	const int eofSym = 0; /* pdt */
+-->declarations
+
+	public Buffer buffer; // scanner buffer
+	
+	Token t;          // current token
+	int ch;           // current input character
+	int pos;          // byte position of current character
+	int charPos;      // position by unicode characters starting with 0
+	int col;          // column number of current character
+	int line;         // line number of current character
+	int oldEols;      // EOLs that appeared in a comment;
+	static readonly Hashtable start; // maps first token character to start state
+
+	Token tokens;     // list of tokens already peeked (first token is a dummy)
+	Token pt;         // current peek token
+	
+	char[] tval = new char[128]; // text of current token
+	int tlen;         // length of current token
+	
+	static Scanner() {
+		start = new Hashtable(128);
+-->initialization
+	}
+	
+	public Scanner (string fileName) {
+		try {
+			Stream stream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read);
+			buffer = new Buffer(stream, false);
+			Init();
+		} catch (IOException) {
+			throw new FatalError("Cannot open file " + fileName);
+		}
+	}
+	
+	public Scanner (Stream s) {
+		buffer = new Buffer(s, true);
+		Init();
+	}
+	
+	void Init() {
+		pos = -1; line = 1; col = 0; charPos = -1;
+		oldEols = 0;
+		NextCh();
+		if (ch == 0xEF) { // check optional byte order mark for UTF-8
+			NextCh(); int ch1 = ch;
+			NextCh(); int ch2 = ch;
+			if (ch1 != 0xBB || ch2 != 0xBF) {
+				throw new FatalError(String.Format("illegal byte order mark: EF {0,2:X} {1,2:X}", ch1, ch2));
+			}
+			buffer = new UTF8Buffer(buffer); col = 0; charPos = -1;
+			NextCh();
+		}
+		pt = tokens = new Token();  // first token is a dummy
+	}
+	
+	void NextCh() {
+		if (oldEols > 0) { ch = EOL; oldEols--; } 
+		else {
+			pos = buffer.Pos;
+			// buffer reads unicode chars, if UTF8 has been detected
+			ch = buffer.Read(); col++; charPos++;
+			// replace isolated '\r' by '\n' in order to make
+			// eol handling uniform across Windows, Unix and Mac
+			if (ch == '\r' && buffer.Peek() != '\n') ch = EOL;
+			if (ch == EOL) { line++; col = 0; }
+		}
+-->casing1
+	}
+
+	void AddCh() {
+		if (tlen >= tval.Length) {
+			char[] newBuf = new char[2 * tval.Length];
+			Array.Copy(tval, 0, newBuf, 0, tval.Length);
+			tval = newBuf;
+		}
+		if (ch != Buffer.EOF) {
+-->casing2
+			NextCh();
+		}
+	}
+
+
+-->comments
+
+	void CheckLiteral() {
+-->literals
+	}
+
+	Token NextToken() {
+		while (ch == ' ' ||
+-->scan1
+		) NextCh();
+-->scan2
+		int recKind = noSym;
+		int recEnd = pos;
+		t = new Token();
+		t.pos = pos; t.col = col; t.line = line; t.charPos = charPos;
+		int state;
+		if (start.ContainsKey(ch)) { state = (int) start[ch]; }
+		else { state = 0; }
+		tlen = 0; AddCh();
+		
+		switch (state) {
+			case -1: { t.kind = eofSym; break; } // NextCh already done
+			case 0: {
+				if (recKind != noSym) {
+					tlen = recEnd - t.pos;
+					SetScannerBehindT();
+				}
+				t.kind = recKind; break;
+			} // NextCh already done
+-->scan3
+		}
+		t.val = new String(tval, 0, tlen);
+		return t;
+	}
+	
+	private void SetScannerBehindT() {
+		buffer.Pos = t.pos;
+		NextCh();
+		line = t.line; col = t.col; charPos = t.charPos;
+		for (int i = 0; i < tlen; i++) NextCh();
+	}
+	
+	// get the next token (possibly a token already seen during peeking)
+	public Token Scan () {
+		if (tokens.next == null) {
+			return NextToken();
+		} else {
+			pt = tokens = tokens.next;
+			return tokens;
+		}
+	}
+
+	// peek for the next token, ignore pragmas
+	public Token Peek () {
+		do {
+			if (pt.next == null) {
+				pt.next = NextToken();
+			}
+			pt = pt.next;
+		} while (pt.kind > maxT); // skip pragmas
+	
+		return pt;
+	}
+
+	// make sure that peeking starts at the current scan position
+	public void ResetPeek () { pt = tokens; }
+
+} // end Scanner

src/core/core.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <RootNamespace>cs_mic.core</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <Target Name="PreBuild" BeforeTargets="PreBuildEvent">
+    <Exec Command="dotnet tool run coco -namespace csmic.Interpreter - frames . $(ProjectDir)\cocor\interpreter.atg" />
+  </Target>
+
+</Project>

src/cs-mic.sln

@@ -0,0 +1,28 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.12.35707.178
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "core", "core\core.csproj", "{5387FF55-3044-4EB4-BB90-AD2E922131C1}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{6394EDF0-24F7-4B75-B4CE-E5F884EE88AC}"
+	ProjectSection(SolutionItems) = preProject
+		setup.ps1 = setup.ps1
+	EndProjectSection
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+		Description = CS-MIC is a .NET library written in C# designed to give developers easy access to expression parsing.
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{5387FF55-3044-4EB4-BB90-AD2E922131C1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{5387FF55-3044-4EB4-BB90-AD2E922131C1}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{5387FF55-3044-4EB4-BB90-AD2E922131C1}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{5387FF55-3044-4EB4-BB90-AD2E922131C1}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

src/setup.ps1

@@ -0,0 +1,3 @@
+Write-Host "Restoring local dotnet tools..."
+dotnet tool restore
+Write-Host "Done. You can now run: dotnet tool run coco"