public UnexpectedTokenException(AsmToken token, AsmTokens expected)
: base(
"Unexpected token " + token.Token + " " + token.Value + " at line " + token.AsmLine + ". Expected: " +
expected)
{
Token = token;
}
public static AsmToken ModifyToken(AsmToken source, string newToken)
{
AsmToken ret = source;
ret.token = newToken;
return(ret);
}
private static void DisplayToken(StringBuilder output, AsmToken asmToken)
{
if (asmToken.LeadingWhiteSpace != null)
{
DisplayToken(output, asmToken.LeadingWhiteSpace);
}
output.Append("<span class=\"" + GetClassFromTokenType(asmToken.Type) + "\">");
output.Append(asmToken.Text);
output.Append("</span>");
}
public static void ReplaceAddressWithSymbolInProgramLine(ProgramLine instructionLine, int addressParameterIndexToReplace, bool addressIsRelative, string symbolName)
{
if (addressParameterIndexToReplace == 0 || addressParameterIndexToReplace == 1)
{
if (instructionLine.OpCodeParameters != null && instructionLine.OpCodeParameters.Count > 0)
{
InstructionLineParam paramToReplace = instructionLine.OpCodeParameters[addressParameterIndexToReplace];
// Find token to replace
AsmToken tokenToReplace = paramToReplace.Tokens.FirstOrDefault <AsmToken>(t => t.Type == AsmTokenType.NUMBER);
if (tokenToReplace != null)
{
// Generate new text for the line, replacing only the address token
StringBuilder lineText = new StringBuilder();
foreach (AsmToken token in instructionLine.AllTokens)
{
if ((!addressIsRelative && token != tokenToReplace) || !paramToReplace.Tokens.Contains(token))
{
lineText.Append(token.TextWithLeadingWhiteSpace);
}
else if (token == tokenToReplace)
{
if (tokenToReplace.LeadingWhiteSpace != null)
{
lineText.Append(tokenToReplace.LeadingWhiteSpace.Text);
}
else if (addressIsRelative && (paramToReplace.Tokens[0] != tokenToReplace))
{
if (paramToReplace.Tokens[0].LeadingWhiteSpace != null)
{
lineText.Append(paramToReplace.Tokens[0].LeadingWhiteSpace.Text);
}
}
lineText.Append(symbolName);
}
}
// Parse new line from text
ProgramLine newTextLine = Assembler.ParseProgramLine(lineText.ToString());
// Copy textual representation to the original program Line
instructionLine.CopyTextualRepresentationFrom(newTextLine);
}
}
}
}
public UnexpectedTokenException(AsmToken token)
: base("Unexpected token " + token.Token + " at line " + token.AsmLine + ".")
{
Token = token;
}
public NotARegisterException(AsmToken token)
: base(token.Value + " is not a register at line " + token.AsmLine + ".")
{
Token = token;
}
public ConstantRedeclaredException(AsmToken token)
: base("Constant " + token.Value + " redeclared at line " + token.AsmLine + ".")
{
Token = token;
}
public LabelRedeclaredException(AsmToken token)
: base("Label " + token.Value + " redeclared at line " + token.AsmLine + ".")
{
Token = token;
}
public UnexpectedTokenException(AsmToken token)
: base("Unexpected token " + token.Token + " at line " + token.AsmLine + ".")
{
Token = token;
}
public ParameterMissingException(AsmToken token)
: base("Missing or too much parameter for instruction " + token.Value + " at line " + token.AsmLine + ".")
{
Token = token;
}
public ConstantRedeclaredException(AsmToken token)
: base("Constant " + token.Value + " redeclared at line " + token.AsmLine + ".")
{
Token = token;
}
public static X86Instruction ReadInstruction(AsmToken[] tokenLine)
{
int tokenCount = tokenLine.Length;
if (tokenLine[0].Token != AsmTokens.Name)
{
throw new UnexpectedTokenException(tokenLine[0], AsmTokens.Name);
}
string instructionName = tokenLine[0].Value;
int line = tokenLine[0].AsmLine;
if (tokenCount == 1)
{
return new X86Instruction(line, instructionName);
}
X86Operand dst;
X86Operand src = null;
switch (tokenLine[1].Token)
{
case AsmTokens.Name:
if (X86Assembler.IsRegister(tokenLine[1].Value))
{
dst = new RegisterArgument(tokenLine[1].Value);
}
else
{
dst = new LabelArgument(tokenLine[1].Value);
}
break;
case AsmTokens.Number:
dst = new ImmediateArgument(tokenLine[1].IntValue);
break;
case AsmTokens.LeftBracket:
IntegerArithmeticExpression expr = IntegerArithmeticProcessor.Process(tokenLine, 1);
dst = new MemoryArgument(expr);
break;
default:
throw new UnexpectedTokenException(tokenLine[1]);
}
bool foundSrc = false;
for (int i = 2; i < tokenCount; i++)
{
if (tokenLine[i].Token == AsmTokens.Comma && i < tokenCount - 1)
{
foundSrc = true;
continue;
}
switch (tokenLine[i].Token)
{
case AsmTokens.Name:
if (X86Assembler.IsRegister(tokenLine[i].Value))
{
src = new RegisterArgument(tokenLine[i].Value);
}
else
{
src = new LabelArgument(tokenLine[i].Value);
}
goto Finish;
case AsmTokens.Number:
src = new ImmediateArgument(tokenLine[i].IntValue);
goto Finish;
case AsmTokens.LeftBracket:
IntegerArithmeticExpression expr = IntegerArithmeticProcessor.Process(tokenLine, i);
src = new MemoryArgument(expr);
goto Finish;
default:
throw new UnexpectedTokenException(tokenLine[i]);
}
}
Finish:
if (!foundSrc)
{
return new X86Instruction(line, instructionName, dst);
}
return new X86Instruction(line, instructionName, dst, src);
}
public ParameterMissingException(AsmToken token)
: base("Missing or too much parameter for instruction " + token.Value + " at line " + token.AsmLine + ".")
{
Token = token;
}
public static IntegerArithmeticExpression Process(AsmToken[] tokenLine, int offset)
{
int tokenCount = tokenLine.Length;
bool closed = false;
if (tokenCount < offset + 2)
{
throw new Exception("Wrong formatted instruction at line" + tokenLine[offset].AsmLine);
}
int i = 1;
var expression = new IntegerArithmeticExpression();
while ((offset + i) < tokenCount)
{
AsmToken token = tokenLine[offset + i];
if ((i & 1) == 1) //Oddth token. It should be either a register or a number.
{
switch (token.Token)
{
case AsmTokens.Name:
string regName = token.Value;
if (!X86Assembler.IsRegister(regName))
{
throw new NotARegisterException(token);
}
expression.AddTerm(regName);
break;
case AsmTokens.Number:
expression.AddTerm(token.IntValue);
break;
default:
throw new UnexpectedTokenException(token);
}
}
else //Eventh token. It is either an operator or the end of the expression.
{
switch (token.Token)
{
case AsmTokens.Plus:
expression.AddOperator(IntegerArithmeticOperatorType.Addition);
break;
case AsmTokens.Mult:
expression.AddOperator(IntegerArithmeticOperatorType.Multiplication);
break;
case AsmTokens.Sub:
expression.AddOperator(IntegerArithmeticOperatorType.Substraction);
break;
case AsmTokens.RightBracket:
closed = true;
break;
default:
throw new UnexpectedTokenException(token);
}
}
i++;
}
if (!closed)
{
throw new Exception("Wrong formatted instruction at line " + tokenLine[0].AsmLine);
}
return(expression);
}
public X86Assembler(AsmToken[][] asmTokens)
{
_asmTokens = asmTokens;
}
public static X86Assembly GenerateAssembly(AsmToken[][] asmTokens)
{
var assembler = new X86Assembler(asmTokens);
return assembler.GenerateAssembly();
}
public NotARegisterException(AsmToken token)
: base(token.Value + " is not a register at line " + token.AsmLine + ".")
{
Token = token;
}
public LabelRedeclaredException(AsmToken token)
: base("Label " + token.Value + " redeclared at line " + token.AsmLine + ".")
{
Token = token;
}
public static IntegerArithmeticExpression Process(AsmToken[] tokenLine, int offset)
{
int tokenCount = tokenLine.Length;
bool closed = false;
if (tokenCount < offset + 2)
{
throw new Exception("Wrong formatted instruction at line" + tokenLine[offset].AsmLine);
}
int i = 1;
var expression = new IntegerArithmeticExpression();
while ((offset + i) < tokenCount)
{
AsmToken token = tokenLine[offset + i];
if ((i & 1) == 1) //Oddth token. It should be either a register or a number.
{
switch (token.Token)
{
case AsmTokens.Name:
string regName = token.Value;
if (!X86Assembler.IsRegister(regName))
{
throw new NotARegisterException(token);
}
expression.AddTerm(regName);
break;
case AsmTokens.Number:
expression.AddTerm(token.IntValue);
break;
default:
throw new UnexpectedTokenException(token);
}
}
else //Eventh token. It is either an operator or the end of the expression.
{
switch (token.Token)
{
case AsmTokens.Plus:
expression.AddOperator(IntegerArithmeticOperatorType.Addition);
break;
case AsmTokens.Mult:
expression.AddOperator(IntegerArithmeticOperatorType.Multiplication);
break;
case AsmTokens.Sub:
expression.AddOperator(IntegerArithmeticOperatorType.Substraction);
break;
case AsmTokens.RightBracket:
closed = true;
break;
default:
throw new UnexpectedTokenException(token);
}
}
i++;
}
if (!closed)
throw new Exception("Wrong formatted instruction at line " + tokenLine[0].AsmLine);
return expression;
}
public bool TryGetNextToken(out AsmToken token)
{
token = new AsmToken();
while (true)
{
var startPosition = _position;
if (_c == 0)
{
return(false);
}
if (_c == '.')
{
token = ParseDirective(startPosition);
return(true);
}
// Like everywhere else in this file, we are inlining the matching characters instead
// of using helper functions, as Mono might not be enough good at inlining by itself
if (_c >= 'a' && _c <= 'z' || _c >= 'A' && _c <= 'Z' || _c == '_' || _c == '@')
{
token = ParseInstructionOrIdentifierOrRegister(startPosition);
return(true);
}
if (_c >= '0' && _c <= '9' || _c == '-')
{
token = ParseNumber(startPosition);
return(true);
}
if (_c == '"')
{
token = ParseString(startPosition);
return(true);
}
if (_c == _commentStartChar)
{
token = ParseComment(startPosition);
return(true);
}
if (_c == '\r')
{
if (PreviewChar() == '\n')
{
NextChar(); // skip \r
}
token = ParseNewLine(startPosition);
return(true);
}
if (_c == '\n')
{
token = ParseNewLine(startPosition);
return(true);
}
token = ParseMisc(startPosition);
return(true);
}
}
public UnexpectedTokenException(AsmToken token, AsmTokens expected)
: base("Unexpected token " + token.Token + " " + token.Value + " at line " + token.AsmLine + ". Expected: " +
expected)
{
Token = token;
}
