static void FirstPass(string inputFile, SymbolTable symbolTable)
{
using (var parser = new Parser(inputFile))
{
int counter = 0;
while (parser.HasMoreCommands())
{
parser.Advance();
if (parser.CommandType() == Parser.L_COMMAND)
{
symbolTable.AddEntry(parser.GetSymbol(), counter);
}
else
{
counter++;
}
}
}
}
static void MainProcess(StreamWriter writer, string inputFile, SymbolTable symbolTable)
{
using (var parser = new Parser(inputFile))
{
string line = "";
int counter = 16;
while (parser.HasMoreCommands())
{
parser.Advance();
if (parser.CommandType() == Parser.A_COMMAND)
{
int address = 0;
string symbol = parser.GetSymbol();
if (!Int32.TryParse(symbol, out address))
{
if (symbolTable.Contains(symbol))
{
address = symbolTable.GetAddress(parser.GetSymbol());
}
else
{
address = counter++;
symbolTable.AddEntry(symbol, address);
}
}
line = Convert.ToString(address, 2).PadLeft(16, '0');
}
else if (parser.CommandType() == Parser.C_COMMAND)
{
var dest = Code.Dest(parser.GetDest());
var comp = Code.Comp(parser.GetComp());
var jump = Code.Jump(parser.GetJump());
line = "111" + comp + dest + jump;
}
else
{
continue; // skip labels
}
writer.WriteLine(line);
}
}
}