private void Ror(string[] operands)
{
if (operands.Length == 2)
{
if (RegisterSyntax.TryParse(operands[0], out var register) && NumberSyntax.TryParse(operands[1], out byte number))
{
if (number < 16)
{
_bytes.Add(((byte)Opcode.Ror, register.Index).Combine(), _currentLineNumber);
_bytes.Add(((byte)0x0, number).Combine(), _currentLineNumber);
return;
}
else
{
throw new AssemblyException("Number cannot be larger than 15.", _currentLineNumber);
}
}
}
throw new AssemblyException("Invalid operands for ror instruction.", _currentLineNumber);
}
private void Org(string[] operands)
{
bool invalidSyntax = false;
if (operands.Length != 1)
{
invalidSyntax = true;
}
else if (NumberSyntax.TryParse(operands[0], out byte number))
{
_bytes.OriginAddress = number;
}
else
{
invalidSyntax = true;
}
if (invalidSyntax)
{
throw new AssemblyException("Expected a single number.", _currentLineNumber);
}
}
private void DataByte(string[] operands)
{
bool invalidSyntax = false;
if (operands.Length == 0)
{
invalidSyntax = true;
}
else
{
foreach (string operand in operands)
{
if (NumberSyntax.TryParse(operand, out byte number))
{
_bytes.Add(number, _currentLineNumber);
}
else if (StringLiteralSyntax.TryParse(operand, out string stringLiteral))
{
foreach (char c in stringLiteral)
{
_bytes.Add((byte)c, _currentLineNumber);
}
}
else
{
invalidSyntax = true;
break;
}
}
}
if (invalidSyntax)
{
throw new AssemblyException("Expected a number or string literal.", _currentLineNumber);
}
}