public Response IsSyntaxValid(List<string> args)
{
var response = new Response {Success = true};
Operator op;
try
{
op = (Operator)Enum.Parse(typeof(Operator), args[0]);
}
catch (Exception)
{
op = Operator.invalid;
}
switch (op)
{
case Operator.addi:
case Operator.add:
case Operator.beq:
if (args.Count != 4)
{
response.Reasons.Add(string.Format("4 operands required for {0}, {1} parameters provided.",
op, args.Count));
response.Success = false;
}
break;
case Operator.j:
if (args.Count != 2)
{
response.Reasons.Add(string.Format("1 operands required for {1}, {0} parameters provided.",
args.Count, op));
response.Success = false;
}
break;
default:
response.Reasons.Add(string.Format("{0}: is an unknown mips operation", args[0]));
response.Success = false;
break;
}
return response;
}
public Response HasValidParams(List<string> parameters)
{
string target, source1, source2;
Operator operation;
var response = new Response {Success = true};
var opString = parameters[0];
Enum.TryParse(opString.Replace("$", string.Empty), true, out operation);
switch (operation)
{
case Operator.add:
{
target = parameters[1];
source1 = parameters[2];
source2 = parameters[3];
if (!target.CanWriteTo())
{
response.Reasons.Add(
string.Format("{0}: error temporary or store error register expected", target));
response.Success = false;
}
if (!source1.CanReadFrom() )
{
response.Reasons.Add(
string.Format("{0}: error temporary or store error register expected", source1));
response.Success = false;
}
if (!source2.CanReadFrom(true) )
{
response.Reasons.Add(string.Format("{0}: error temporary or store error register expected", source2));
response.Success = false;
}
}
break;
case Operator.addi:
{
target = parameters[1];
source1 = parameters[2];
source2 = parameters[3];
if (!target.CanWriteTo())
{
response.Reasons.Add(string.Format("{0}: error temporary or store error register expected", target));
response.Success = false;
}
if (!source1.CanReadFrom())
{
response.Reasons.Add(string.Format("{0}: error temporary or store error register expected", source1));
response.Success = false;
}
if (!source2.IsMIPSConstant(true))
{
response.Reasons.Add(string.Format("{0}: error constant expected.", source2));
response.Success = false;
}
}
break;
case Operator.beq:
{
source1 = parameters[1];
source2 = parameters[2];
target = parameters[3];
if (!source1.CanReadFrom())
{
response.Reasons.Add(string.Format("{0}: error temporary or store error register expected", source1));
response.Success = false;
}
if (!source2.CanReadFrom())
{
response.Reasons.Add(string.Format("{0}: error temporary or store error register expected", source2));
response.Success = false;
}
if (!target.IsLabel() && !target.IsMIPSConstant())
{
response.Reasons.Add(string.Format("{0}: error label or constant expected", target));
response.Success = false;
}
}
break;
}
return response;
}
