private OperandAST parseOperand()
{
OperandFlag flag = OperandFlag.None;
OperandType type = OperandType.Standard;
// Look for <Flags>:
var firstPeek = lookAhead(0);
var secondPeek = lookAhead(1);
// Found flags
if (isFlag(firstPeek) && secondPeek == ':')
{
// Parse and eat the flag
flag = parseFlag(eatToken());
// Eat :
_ = eatToken();
}
// Look for <type>
firstPeek = lookAhead(0);
if (isType(firstPeek))
{
// Parse and eat the type
type = parseType(eatToken());
}
firstPeek = lookAhead(0);
secondPeek = lookAhead(1);
// It's a memory addresss
if (firstPeek == '0' && secondPeek == 'x')
{
MemoryAddressAST memoryOperand = parseMemoryAddress();
if (memoryOperand != null)
{
memoryOperand.Flag = flag;
memoryOperand.Type = type;
return(memoryOperand);
}
}
// Else it's a value
else if (char.IsNumber(firstPeek))
{
return(new NumberAST
{
Flag = flag,
Type = type,
Value = parseNumber()
});
}
else
{
throw new ParserException($"Invalid token at column {_index}");
}
return(null);
}
public void ShouldParseOperandFlags(string input, OperandFlag operandFlag)
{
Parser parser = new Parser();
var tree = parser.Parse(input);
var condition = tree.Core.Conditions[0];
Assert.Equal(ConditionCompare.Equals, condition.CompareOperator);
Assert.Equal(0, condition.HitCount);
Assert.IsType <MemoryAddressAST>(condition.Left);
Assert.IsType <NumberAST>(condition.Right);
var left = condition.Left as MemoryAddressAST;
var right = condition.Right as NumberAST;
Assert.Equal(0x1234, left.Address);
Assert.Equal(MemoryAddressKind.Int8, left.Kind);
Assert.Equal(OperandType.Standard, left.Type);
Assert.Equal(operandFlag, left.Flag);
Assert.Equal(8, right.Value);
}
public itemplate( OCE aOpCode, int aOperandCount, ulong[] aOperands, int OpCodeAdress, OperandFlag aFlag1, OperandFlag aFlag2, OperandFlag aFlag3, OperandFlag aFlag4, OperandFlag aFlag5 )
{
opcode = aOpCode;
operands = aOperandCount;
opd = aOperands;
code = OpCodeAdress;
flag1 = aFlag1;
flag2 = aFlag2;
flag3 = aFlag3;
flag4 = aFlag4;
flag5 = aFlag5;
}
public itemplate( OCE aOpCode, int aOperandCount, ulong[] aOperands, int OpCodeAdress, OperandFlag aFlag1, OperandFlag aFlag2 )
{
opcode = aOpCode;
operands = aOperandCount;
opd = aOperands;
code = OpCodeAdress;
flag1 = aFlag1;
flag2 = aFlag2;
flag3 = OF.NONE;
flag4 = OF.NONE;
flag5 = OF.NONE;
}
