public static Instruction Parse(string input)
{
var inst = new Cinstruction();
inst._comp = ParseComp(GetInstruction(input));
inst._dest = ParseDest(GetDestination(input));
inst._jump = ParseJump(GetJump(input));
return(inst);
}
public static Instruction Parse(string input)
{
var inst = new Cinstruction();
inst._comp = ParseComp(GetInstruction(input));
inst._dest = ParseDest(GetDestination(input));
inst._jump = ParseJump(GetJump(input));
return inst;
}
static List <Instruction> GetInstructions(List <string> lines)
{
var instructions = new List <Instruction>();
//var _predefSymbols = new Dictionary<string, int>();
int lineNo = 0;
// second pass
foreach (var line in lines)
{
if (line.StartsWith("(") && line.EndsWith(")"))
{
// a symbol
symbols.Add(line.Substring(1, line.Length - 2), lineNo);
// continue; don't increment the line number (this is a label, not an instruction)!
continue;
}
++lineNo;
}
// second pass
int variableNo = 16;
foreach (var line in lines)
{
if (line == string.Empty)
{
continue;
}
if (line.StartsWith("(") && line.EndsWith(")"))
{
continue;
}
if (line.StartsWith("@"))
{
string valueString = line.Substring(1);
try
{
System.Convert.ToInt32(valueString);
}
catch (System.FormatException)
{
// string!
if (!symbols.ContainsKey(valueString))
{
// a symbol
symbols.Add(valueString, variableNo);
++variableNo;
// continue; don't increment the line number (this is a label, not an instruction)!
}
}
instructions.Add(Ainstruction.Parse(line, symbols));
}
else
{
instructions.Add(Cinstruction.Parse(line));
}
}
return(instructions);
}
