public void SomeTest()
{
Parser parser = new Parser();
parser.currentTxtCommand = "D=A";
String destMnemonic = parser.Dest();
Assert.IsTrue(destMnemonic == "D", "parser failed");
String compMnemonic = parser.Comp();
Assert.IsTrue(compMnemonic == "A", "parser failed");
string destBin = CodeGenerator.Dest(destMnemonic);
Assert.IsTrue(destBin == "010");
string compbin = CodeGenerator.Comp(compMnemonic);
Assert.IsTrue(compbin == "0110000");
}
public void CompTest()
{
Parser parser = new Parser();
parser.currentTxtCommand = "D=A";
Assert.IsTrue(parser.Comp() == "A");
parser.currentTxtCommand = "M=D";
Assert.IsTrue(parser.Comp() == "D");
parser.currentTxtCommand = ";JMP";
parser.Comp();
Assert.IsTrue(parser.Comp() == String.Empty);
parser.currentTxtCommand = "0;JMP";
Assert.IsTrue(parser.Comp() == "0");
parser.currentTxtCommand = "M=D+M";
Assert.IsTrue(parser.Comp() == "D+M");
parser.currentTxtCommand = "MD=M+1";
Assert.IsTrue(parser.Comp() == "M+1");
parser.currentTxtCommand = "D;JNE";
Assert.IsTrue(parser.Comp() == "D");
bool exceptionThrown = false;
try
{
parser.currentTxtCommand = "@0";
parser.Comp();
}
catch
{
exceptionThrown = true;
}
Assert.IsTrue(exceptionThrown);
}
/**
* Drives the Assembler.
*
* @param args program runtime arguments
*
* @refcode N/A
* @errtest
* Differing program arguments.
* @errmsg
* - Incorrect number of arguments.
* - Usage information
* @author Mark
* @creation April 5, 2011
* @modlog
* - April 6, 2011 - Mark - Initializes Logger.
* - April 8, 2011 - Mark - Reads files in from the command line.
* - April 8, 2011 - Mark - Initializes and uses a Parser object.
* - April 8, 2011 - Mark - Outputs results to screen.
* - April 9, 2011 - Mark - Uses an IntermediateFile object.
* - April 9, 2011 - Mark - Catches problem with improper number of arguments.
* - April 10, 2011 - Mark - Uses a SymbolTable object.
* - May 8, 2011 - Jacob - Only process one file.
* @teststandard Andrew Buelow
* @codestandard Mark Mathis
*/
public static void Main(string[] args)
{
string infile = null;
string outfile = null;
// single arg given, output to stdout
if (args.Length == 1)
{
infile = args[0];
outfile = System.IO.Path.GetFileNameWithoutExtension(args[0]) + ".obj";
}
// two args given, read in the first and output to the second
else if (args.Length == 2)
{
infile = args[0];
outfile = args[1];
}
// invalid; print usage
else
{
Usage();
System.Environment.Exit(1);
}
Errors.SetResource(Properties.Resources.errors);
// pass 1
Logger.Log("Starting up", "Main");
SymbolTable symb = new SymbolTable();
Parser pars = new Parser();
IntermediateFile interSource;
pars.ParseSource(infile, out interSource, out symb);
bool fatalerr = false;
AssemblyReport report = new AssemblyReport();
// Checking for fatal errors and creating an Assembly Report to display if a fatal error is found.
foreach (IntermediateLine line in interSource)
{
if (line.Fatal)
{
fatalerr = true;
}
report.Add(line.ProgramCounter, "0000", ' ', line.SourceLineNumber, line.SourceLine, line.GetThreeErrors());
}
if (fatalerr)
{
// Output the report
Console.WriteLine(report);
// and symbol table
Console.WriteLine(symb);
// Stop the assembler
System.Environment.Exit(10);
}
#if DEBUG
Console.WriteLine(interSource);
#endif
// pass 2
Logger.Log("Starting pass 2", "Main");
interSource.CalculateModuleLength();
report = new AssemblyReport();
ObjectFile obj = new ObjectFile(ref interSource, ref symb, ref report);
obj.Render(outfile);
// print out assembly report
Console.WriteLine(report);
// and symbol table
Console.WriteLine(symb);
}
public void SymbolTest()
{
Parser parser = new Parser();
parser.currentTxtCommand = "@0";
Assert.IsTrue(parser.Symbol() == "0");
parser.currentTxtCommand = "@Something";
Assert.IsTrue(parser.Symbol() == "Something");
parser.currentTxtCommand = "(foo)";
Assert.IsTrue(parser.Symbol() == "foo");
bool exceptionThrown = false;
try
{
parser.currentTxtCommand = "M=D+M";
parser.Symbol();
}
catch
{
exceptionThrown = true;
}
Assert.IsTrue(exceptionThrown);
}
public void JumpTest()
{
Parser parser = new Parser();
parser.currentTxtCommand = "0;JMP";
Assert.IsTrue(parser.Jump() == "JMP");
}
/// <summary>
/// First pass of the assembly file.
/// Finds all symbols and stores them in a Dictionary along (with the next line number)
/// i.e. fills the symbol table
/// </summary>
/// <param name="inputBytes">The input bytes.</param>
/// <param name="symbolTable">The symbol table.</param>
private void FillSymbolTable(byte[] inputBytes)
{
using (MemoryStream inputStream = new MemoryStream(inputBytes))
using (Parser parser = new Parser(inputStream))
{
int lineCounter = 0;
while (parser.HasMoreCommands())
{
parser.Advance();
if (parser.CommandType() == Command.L_COMMAND)
{
// store the lable and next line
this.SymbolTable.AddEntry(parser.Symbol(), lineCounter);
}
else if (parser.CommandType() == Command.C_COMMAND
|| parser.CommandType() == Command.A_COMMAND)
{
// ignore non label commands in the asm file.
lineCounter++;
}
}
}
}
/// <summary>
/// Seconds the pass.
/// TODO - refactor! break into smaller methods!!!
/// after the first symbol table filling pass,
/// we march thru the lines again, the parser gives us each command and its type
/// we pass these to the code generator to build our binary representation
/// </summary>
/// <param name="inputBytes">The input bytes.</param>
/// <param name="symbolTable">The symbol table.</param>
/// <returns></returns>
private string FinalPass(byte[] inputBytes)
{
MemoryStream inputStream = new MemoryStream(inputBytes);
using (Parser parser = new Parser(inputStream))
{
StringBuilder fullBinaryListing = new StringBuilder();
// magic number, new variables in the hack platform are stored from address 16 upwards.
int addressCounter = 16;
//TODO - horrible nested while and if chain - break into methods
while (parser.HasMoreCommands())
{
String binaryLine = String.Empty;
parser.Advance();
if (parser.CommandType() == Command.C_COMMAND)
{
binaryLine = CodeGenerator.GetFullCInstruction(parser.Comp(), parser.Dest(), parser.Jump()) + Environment.NewLine;
fullBinaryListing.Append(binaryLine);
}
else if (parser.CommandType() == Command.A_COMMAND)
{
binaryLine = this.Handle_A_Command(parser.Symbol(), ref addressCounter);
fullBinaryListing.Append(binaryLine + Environment.NewLine);
}
}
return fullBinaryListing.ToString();
}
#endregion
}
