protected void addErrorMesage(string message, IToken offendingToken)
{
ErrorMessage error = new ErrorMessage();
error.SourceFile = _driver.SourceFilePath;
error.Message = message;
if (offendingToken != null)
{
error.Context = offendingToken.InputStream.ToString().Split('\n')[offendingToken.Line - 1].Replace('\t', ' ').TrimEnd();
error.Line = offendingToken.Line;
error.Column = offendingToken.Column;
error.StartToken = offendingToken.StartIndex;
error.EndToken = offendingToken.StopIndex;
}
_driver.Errors.Add(error);
}
public override void SyntaxError(IRecognizer recognizer, IToken offendingSymbol, int line, int charPositionInLine, string msg, RecognitionException e)
{
ErrorMessage errorMessage = new ErrorMessage();
CommonTokenStream tokens = (CommonTokenStream)recognizer.InputStream;
errorMessage.SourceFile = _driver.SourceFilePath;
errorMessage.Context = tokens.TokenSource.InputStream.ToString().Split('\n')[line - 1].Replace('\t', ' ').TrimEnd();
errorMessage.Line = line;
errorMessage.Column = charPositionInLine;
errorMessage.Message = msg;
errorMessage.StartToken = offendingSymbol.StartIndex;
errorMessage.EndToken = offendingSymbol.StopIndex;
_driver.Errors.Add(errorMessage);
}
public void SecondPass()
{
if (Vectors == null)
{
ErrorMessage error = new ErrorMessage();
error.SourceFile = SourceFilePath;
error.Message = "Required vectors statement not found.";
Errors.Add(error);
}
ParseTreeWalker walker = new ParseTreeWalker();
walker.Walk(new SecondCpuPass(this), _rootTree);
if (Errors.Count > 0)
{
throw new CompilerErrorException();
}
}
private void verifyBranchLength()
{
long physicalAddress = 0;
Scope parentScope = _globalScope;
foreach (var scope in parentScope.Children)
{
foreach (var instruction in scope.Statements)
{
if (instruction is CpuInstructionStatement)
{
var cpuInstruction = instruction as CpuInstructionStatement;
if (cpuInstruction.AddressingMode == CpuAddressingMode.Relative)
{
int instructionSize = (int)instruction.ComputeSize();
if (cpuInstruction.Arguments[0] is LabelInstructionArgument)
{
var labelArgument = cpuInstruction.Arguments[0] as LabelInstructionArgument;
int labelAddress = (int)scope.AddressFor(labelArgument.Label);
int branchLength = labelAddress - ((int)physicalAddress + instructionSize);
if (branchLength > sbyte.MaxValue || branchLength < sbyte.MinValue)
{
ErrorMessage error = new ErrorMessage();
error.SourceFile = SourceFilePath;
error.Message = String.Format("Branch label '{0}' is too far away. Consider reducing the distance or use a jmp.", labelArgument.Label);
error.Line = instruction.Line;
error.Column = instruction.Column;
Errors.Add(error);
}
}
}
}
physicalAddress += instruction.ComputeSize();
}
}
}
static void printErrorMessage(ErrorMessage error)
{
Console.Error.WriteLine("{0}({1},{2}): error: {3}", error.SourceFile, error.Line, error.Column, error.Message);
if (!String.IsNullOrEmpty(error.Context))
{
Console.Error.WriteLine(error.Context);
for (int i = 0; i < error.Column; ++i)
{
Console.Error.Write(' ');
}
for(int i=error.StartToken; i<=error.EndToken; ++i)
{
Console.Error.Write("^");
}
Console.Error.WriteLine();
}
}