/**
* Parses the operation section of the line if it has a Directive.
*
* @param line current line to parse
* @param interLine the line as a single line in the intermediate file
* @param symb symbol table reference
* @refcode DS2
* @errtest
* N/A
* @errmsg
* N/A
* @author Mark Mathis
* @creation April 9, 2011
* @modlog
* - April 9, 2011 - Mark - ParseDirective properly parses directives.
* - April 9, 2011 - Mark - Uses new ParseLiteralOperand format.
* - April 12, 2011 - Jacob - Factor out operand parsing.
* - April 14, 2011 - Mark - Moved into DirectiveParser class.
* - April 15, 2011 - Mark - Factored out all parsing into separate methods.
* @teststandard Andrew Buelow
* @codestandard Mark Mathis
*/
public static void ParseDirective(ref string line, ref IntermediateLine interLine, ref SymbolTable symb)
{
Logger.Log("Parsing directive on line " + interLine.SourceLineNumber, "DirectiveParser");
if (interLine.Directive.ToUpper() != "NOP")
OperandParser.ParseOperand(ref line, ref interLine, ref symb, 16);
// This will decide which directive is in this line and how it should
// be handled by the parser.
string currentDirective = interLine.Directive.ToUpper();
switch (currentDirective)
{
case "START":
{
ParseStart(ref interLine, ref symb);
} break;
case "RESET":
{
ParseReset(ref interLine, ref symb);
} break;
case "EQU":
{
ParseEqu(ref interLine, ref symb);
} break;
case "EQUE":
{
ParseEque(ref interLine, ref symb);
} break;
case "ENTRY":
{
ParseEntry(ref interLine, ref symb);
} break;
case "EXTRN":
{
ParseExtrn(ref interLine, ref symb);
} break;
case "END":
{
ParseEnd(ref interLine, ref symb);
} break;
case "DAT":
{
ParseDat(ref interLine, ref symb);
} break;
case "ADC":
{
ParseAdc(ref interLine, ref symb);
} break;
case "ADCE":
{
ParseAdce(ref interLine, ref symb);
} break;
case "NOP":
{
interLine.NOPificate();
interLine.ProgramCounter = Parser.LC;
Parser.IncrementLocationCounter();
} break;
default:
{
} break;
}
Logger.Log("Finished parsing directive on line " + interLine.SourceLineNumber, "DirectiveParser");
}
/**
* Parses the dat directive, ensuring that the operand has proper syntax
* and is correctly assigned to the current word of memory.
*
* @param interLine the intermediate line to process
* @param symb symbol table reference
*
* @refcode D8
* @errtest
* N/A
* @errmsg ES.14
* @author Mark Mathis
* @creation April 18, 2011
* @modlog
* - April 19, 2011 - Jacob - Fixed padding on values.
* - April 24, 2011 - Mark - Commented out the part that put the value of the dat
* into the symbol table until that can be made clearer
* by Al.
* @teststandard Andrew Buelow
* @codestandard Mark Mathis
*/
private static void ParseDat(ref IntermediateLine interLine, ref SymbolTable symb)
{
Logger.Log("Parsing DAT directive", "DirectiveParser");
if (interLine.DirectiveLitOperand != OperandParser.Literal.NONE &&
interLine.DirectiveLitOperand != OperandParser.Literal.EXPRESSION &&
interLine.DirectiveLitOperand != OperandParser.Literal.NUMBER &&
interLine.DirectiveLitOperand != OperandParser.Literal.UNKNOWN)
{
if (interLine.Label != null)
{
if (!symb.ContainsSymbol(interLine.Label))
{
symb.AddSymbol(interLine.Label, Parser.LC, Usage.LABEL); //,interLine.DirectiveOperand);
}
else
{
Symbol datSym = symb.RemoveSymbol(interLine.Label);
datSym.lc = Parser.LC;
//datSym.val = interLine.DirectiveOperand;
symb.AddSymbol(datSym);
}
}
string val = Convert.ToString(Convert.ToInt32(interLine.DirectiveOperand, 16), 2);
// assumed to be in correct representation; always pad to the left
interLine.Bytecode = val.PadLeft(16, '0');
}
else if (interLine.DirectiveLitOperand == OperandParser.Literal.UNKNOWN)
{
// error: literal operand in improper format
interLine.AddError(Errors.Category.Serious, 37);
}
else
{
// error: invalid operand type
Logger.Log("ERROR: ES.14 encountered", "DirectiveParser");
interLine.AddError(Errors.Category.Serious, 14);
interLine.NOPificate();
}
// this should need to happen no matter what
interLine.ProgramCounter = Parser.LC;
Parser.IncrementLocationCounter();
Logger.Log("Finished parsing DAT directive", "DirectiveParser");
}