public Translator(SymbolTable symbolTable)
{
Symbols = symbolTable;
}
static int Main(string[] args)
{
// The program should receive a text file named XXX.asm
// (it should act as a command-line and receive XXX.asm as an argument)
string szFile = args[0];
// -- check the file extention is asm
if (szFile.Substring(szFile.Length - 4) != ".asm")
{
Console.WriteLine("Manager.Main: Error! the received file doesn't have the right extension.");
return(1);
}
// -- create the symbol table
SymbolTable cSymbTab = new SymbolTable();
// -- create generated code string
string szGenCode = "";
// -- check the file exists
if (!File.Exists(@szFile))
{
Console.WriteLine("Manager.Main: Error! the received file doesn't exist.");
return(1);
}
FileInfo fAsm = new FileInfo(@szFile);
// -- open file and read it line by line
using (StreamReader fsAsm = fAsm.OpenText())
{
// First pass
string szCurrLine = "";
Parser cParser = new Parser();
while ((szCurrLine = fsAsm.ReadLine()) != null)
{
cParser.NewInstr(szCurrLine, true);
if (cParser.IsLabelDefinition())
{
cSymbTab.AddLabel(cParser.GetLblName(), cParser.GetInstrNum());
}
}
// Second pass
cParser.Init();
fsAsm.DiscardBufferedData();
fsAsm.BaseStream.Seek(0, SeekOrigin.Begin);
Code cCode = new Code();
while ((szCurrLine = fsAsm.ReadLine()) != null)
{
cParser.NewInstr(szCurrLine, false);
if (cParser.IsAInstruction())
{
string szAddr = cParser.GetAInstrElts();
cSymbTab.AddVar(szAddr);
if (cSymbTab.HasSymbol(szAddr))
{
szAddr = cSymbTab.FetchVal(szAddr).ToString();
}
szGenCode += string.Format("{0}\n", cCode.translateAInstr(szAddr));
}
else if (cParser.IsCInstruction())
{
string[] szElts = cParser.GetCInstrElts();
szGenCode += string.Format("{0}\n", cCode.translateCInstr(szElts));
}
}
}
// The generated code is written into a text file named XXX.hack
// ASSUMPTION: XXX.asm is error free
string szOutFile = szFile.Substring(0, szFile.Length - 3); // truncate asm extension
szOutFile += "hack"; // update with hack extension
File.WriteAllText(@szOutFile, szGenCode.Substring(0, szGenCode.Length - 1));
return(0);
}
