/*On?my?honour?I?have?neither?given?nor?received?unauthorized?aid?on?this?assignment.*/
import?java.io.BufferedReader;
import?java.io.File;
import?java.io.FileNotFoundException;
import?java.io.FileReader;
import?java.io.IOException;
import?java.io.PrintStream;
import?java.lang.reflect.InvocationTargetException;
import?java.lang.reflect.Method;
import?java.util.ArrayList;
import?java.util.Iterator;
import?java.util.logging.Level;
import?java.util.logging.Logger;

public?class?MIPSsim?{

	public?static?void?main（String[]?args）?throws?FileNotFoundException?IOException?Throwable?{
		File?file?=?new?File（args[0]）;
		Reader?reader?=?new?Reader（file）;
		Parser?parser?=?new?Parser（）;

		Simulator?simulator?=?new?Simulator（256?file.getAbsoluteFile（）.getParent（））;
		Instruction?instruction?=?new?Instruction（）;

		String?line;
		while?（（line?=?reader.read（））?!=?null）?{
			instruction?=?parser.parseInstruction（line）;
			simulator.addInstruction（instruction）;
			if?（instruction.name.equals（“BREAK“））?{
				break;
			}
		}
		PrintStream?dis_out?=?new?PrintStream（file.getAbsoluteFile（）.getParent（）?+?“/disassembly.txt“）;
		//if（instruction.isEmpty（））{
		if（line?==?null）{
			dis_out.print（“The?input?file?is?empty.“）;
		}

		ArrayList?data?=?new?ArrayList（）;
		while?（（line?=?reader.read（））?!=?null）?{
			data.add（parser.parserData（line））;
		}
		simulator.setData（data.toArray（））;

		//simulator.printInstructions（）;

		simulator.printInstructions（dis_out）;
		dis_out.close（）;
		simulator.run（）;
		reader.close（）;
	}
	}

	class?Parser?{

		public?Parser（）?{
		}

		public?Instruction?parseInstruction（String?line）?{
			Instruction?instruction?=?new?Instruction（）;
			instruction.binary?=?line;
			String?prefix?=?line.substring（0?2）;
			int?opCode?=?binaryToDec（line.substring（2?6）?false）;
			line?=?line.substring（6）;?
			InstructionFormat?definition?=?Config.nullDefinition;

			if?（prefix.equals（“01“））?{
				definition?=?Config.formatCategory1[opCode];
			}?else?if?（prefix.equals（“11“））?{
				definition?=?Config.formatCategory2[opCode];
			}?else?{
				//?unrecogonized?instruction
			}

			instruction.name?=?definition.name;
			instruction.template?=?definition.template;

			//System.out.print（instruction.name?+?“?“）;
			//?fill?args
			int[]?args?=?new?int[definition.argsLength.length];
			for?（int?i?=?0;?i?!=?args.length;?i++）?{
				boolean?isSignedArgs?=?false;
				int?argsLength?=?definition.argsLength[i];
				if?（argsLength?					isSignedArgs?=?true;
					argsLength?=?-argsLength;
				}
				String?rawArgs?=?line.substring（0?argsLength）;
				args[i]?=?Parser.binaryToDec（rawArgs?isSignedArgs）;
				//System.out.print（“?“?+?args[i]）;
				line?=?line.substring（argsLength）;
			}
			//System.out.println（）;
			int[]?orderedArgs?=?new?int[definition.argsOrder.length];
			for?（int?i?=?0;?i?!=?orderedArgs.length;?i++）?{
				orderedArgs[i]?=?args[definitio