CrossAssembler.java

import analysers.FileReader;
import analysers.ILexicalAnalyser;
import analysers.LexicalAnalyser;
import analysers.SyntaxAnalyser;
import errorReporters.*;
import components.SymbolTable;
import errorReporters.IErrorReporter;
import generators.CodeGenerator;
import generators.Listing;
import interfaces.*;
import components.Options;

/**
 * main class for cross assembler
 */
public class CrossAssembler {

    public static void main(String[] args) {

        System.out.println("\nFor more information about the cross-assemblers optional features, please include the " +
                "\"-h\" flag following the file name");

        Options options = new Options(args);

        String srcFile = "";
                //"Sprint Listing/rela02.asm";

        //for command line file name specification
       if(args.length > 0) {
            if (args.length != 1 && !options.helpEnabled())
                srcFile = fileName(args[args.length - 1] );
            else
            {
                System.out.println("File not specified");
                System.exit(404);
            }
        }else{
            System.out.println("File not specified");
            System.exit(404);
        }

        IFileReader reader = new FileReader(srcFile);

        //Creation of Error Reporter
        IErrorReporter errRep = new ErrorReporter(srcFile);

        //creation of symbol table
        ISymbolTable symbolTable = new SymbolTable();

        //creation of line components.IR and subsequent line statements
        ILexicalAnalyser lexer = new LexicalAnalyser(reader, symbolTable, errRep);
        ISyntaxAnalyser parser = new SyntaxAnalyser(symbolTable, lexer, errRep);


        //creation of objects used to traverse components.IR
        IIR intRep = parser.parse();
        //IListing list = new Listing(intRep);

        if (!errRep.isEmpty()) {
            errRep.reportErrors();
        }
        //generates .lst file
        CodeGenerator codeGenerator = new CodeGenerator(intRep, symbolTable, options, errRep, srcFile);

    }

    private static String fileName(String srcFile)
    {
        String fileName = "";
        boolean hasExtension = false;
        for(int i=0;i<srcFile.length();i++)
        {
            if(srcFile.charAt(i)=='.' && srcFile.length()==i+4)
            {
                hasExtension = true;
                if(srcFile.substring(i,srcFile.length()-1)==".asm"){
                    fileName = srcFile.substring(0,srcFile.length()-4);
                }else{
                    fileName=srcFile;
                }
            }

        }
        if(!hasExtension){
            fileName=srcFile;
        }
        return fileName;
    }

}