static void Main(string[] args)
{
// Watch for unhandled exceptions
AppDomain.CurrentDomain.UnhandledException += UnhandledExceptionHandler;
LogManager.Enabled = true;
LogManager.AttachLogTarget(new ConsoleTarget(Level.Trace));
Console.ForegroundColor = ConsoleColor.Yellow;
PrintBanner();
Console.ResetColor();
if (args.Length < 1 ||
Path.GetExtension(args[0]) != FileManager.INPUT_FILE_EXTENSION)
{
PrintUsage();
Environment.Exit(1);
}
using (FileManager fileManager = new FileManager(args[0]))
{
SymbolTable symbolTable = new SymbolTable();
CodeGeneratorHelper cdh = new CodeGeneratorHelper();
SyntaxTree syntaxTree;
if (RunPhase_1(fileManager, symbolTable, out syntaxTree) &&
RunPhase_2(syntaxTree, symbolTable, cdh) &&
RunPhase_3(fileManager, syntaxTree, symbolTable, cdh))
{
Logger.Info("Compilation successful.");
}
fileManager.FinalizeListing();
}
}
public Scanner(FileManager fileManager, SymbolTable symbolTable)
{
this._fileManager = fileManager;
this._symbolTable = symbolTable;
this._specialChars = this._symbolTable.GetSpecialCharList();
this._peekSymbol = AdvanceSymbol();
}
public GeneratedScannerWrapper(FileManager fileManager, SymbolTable symbolTable)
{
this._scanner = new NaseScanner(fileManager.Input);
this._scanner.SymbolTable = symbolTable;
this._symbolTable = symbolTable;
this._peekSymbol = (Symbol)this._scanner.yylex();
if (this._peekSymbol == Symbol.INTEGER_LITERAL_SYMBOL || this._peekSymbol == Symbol.IDENTIFIER_SYMBOL)
{
UpdateSymbol();
}
}
public Parser(SymbolTable symbolTable, IScanner scanner)
{
this._symbolTable = symbolTable;
this._scanner = scanner;
}
static bool RunPhase_1(FileManager fileManager, SymbolTable symbolTable, out SyntaxTree syntaxTree)
{
if (false)
{
IScanner scanner = new GeneratedScannerWrapper(fileManager, symbolTable);
//IScanner scanner = new Scanner(fileManager, symbolTable);
Parser parser = new Parser(symbolTable, scanner);
bool result = parser.ParseProgramm(out syntaxTree);
Logger.Debug(symbolTable.DumpSymbolTable());
Logger.Debug(syntaxTree.DumpTreeTable());
return result;
}
else
{
NaseScanner scanner = new NaseScanner(fileManager.Input);
scanner.SymbolTable = symbolTable;
NaseParser parser = new NaseParser(scanner, symbolTable);
bool result = parser.Parse();
syntaxTree = parser.SyntaxTree;
if (result)
{
Logger.Debug(symbolTable.DumpSymbolTable());
Logger.Debug(syntaxTree.DumpTreeTable());
}
return result;
}
}
static bool RunPhase_3(FileManager fileManager, SyntaxTree syntaxTree, SymbolTable symbolTable, CodeGeneratorHelper cdh)
{
fileManager.InitializeOutputFile();
syntaxTree.GenerateCode(fileManager, symbolTable, cdh);
fileManager.FinalizeOutputFile();
return true;
}
static bool RunPhase_2(SyntaxTree syntaxTree, SymbolTable symbolTable, CodeGeneratorHelper storage)
{
if (syntaxTree.CheckForSemanticErrors(symbolTable) &&
syntaxTree.AllocateMemoryForConstants(storage) &&
syntaxTree.AllocateMemoryForVariables(storage))
{
return true;
}
return false;
}