/**
* Create an object file using the given inputs.
*
* @param input Input source from pass 1
* @param symb The symbol table
* @param report an assembly report to be generated
* @refcode OB
* @errtest
* N/A
* @errmsg
* N/A
* @author Jacob Peddicord
* @creation May 10, 2011
* @modlog
* @teststandard Andrew Buelow
* @codestandard Mark Mathis
*/
public ObjectFile(ref IntermediateFile input, ref SymbolTable symb, ref AssemblyReport report)
{
this.input = input;
this.symb = symb;
this.report = report;
}
/**
* Parses an entire source code file.
*
* @param path the path of the source file to parse.
* @param interSource resultant intermediate file from this source
* @param symb resultant symbol table from this source
*
* @refcode N/A
* @errtest
* N/A
* @errmsg
* N/A
* @author Mark Mathis
* @creation April 8, 2011
* @modlog
* - April 9, 2011 - Mark - Parses entire source code file from a string.
* - April 9, 2011 - Mark - Reads source file in from a file.
* - April 9, 2011 - Mark - Catches exceptions possibly raised by reading the file.
* - April 9, 2011 - Jacob - Adds symbols to the symbol table. Changed the parameters to
* pass in an IntermediateFile and SymbolTable with an expected out value. Return type
* is now void.
* @teststandard Andrew Buelow
* @codestandard Mark Mathis
*/
public void ParseSource(string path, out IntermediateFile interSource, out SymbolTable symb)
{
string[] sourceCode = new string[1];
try
{
Logger.Log("Opening file: " + path, "Parser");
sourceCode = File.ReadAllLines(path);
}
catch (FileNotFoundException ex)
{
Logger.Log("Failed to open file. Error: " + ex.Message, "Parser");
Console.WriteLine("{0}\n{1}", ex.Message, "Exiting program");
System.Environment.Exit(1);
}
interSource = new IntermediateFile();
symb = new SymbolTable();
// first line is expected to hold the start directive
IntermediateLine line = ParseLine(sourceCode[0], 1, ref symb);
interSource.AddLine(line);
if (line.Directive != null)
{
if (line.Directive.ToUpper() != "START")
{
// file must start with a valid start directive
line.AddError(Errors.Category.Fatal, 2);
return;
}
else if (HasFatalError(line))
{
return;
}
}
else
{
line.AddError(Errors.Category.Fatal, 2);
return;
}
bool reachedEnd = false;
// iterate the lines of the file
for (short i = 2; i <= sourceCode.Length; i++)
{
// parse a line and create an intermediate version
line = ParseLine(sourceCode[i - 1].TrimEnd(), i, ref symb);
// if we're at the end and processing another line
if (reachedEnd)
{
if (line.SourceLine.Length > 0)
line.AddError(Errors.Category.Fatal, 7);
}
// check the LC. at this point, the line will have incremented
// already, so check if it's 1024 instead of 1023.
if (Convert.ToInt32(Parser.LC, 16) > 1024)
{
line.AddError(Errors.Category.Fatal, 3);
}
// add to source
if (!reachedEnd || line.SourceLine.Length > 0)
interSource.AddLine(line);
// did we find le end?
if (line.Directive == "END")
{
reachedEnd = true;
}
// check for fatal errors
if (HasFatalError(line))
{
break;
}
}
}
