import java.util.*;
import java.*;
import java.io.*;


//This class is responsible for basic file operations
//The functions include


public class FileReader{

	public char sym; //The current character on the input, 0x00 = error, 0xff = EOF
	private BufferedReader in;
	private File f;
	private String lineString;
	private boolean errorCondition = false;

	public FileReader(String fileName)	//Constructor: Opens a file and reads the first character into 'sym'
	{
		char temp;

		try
		{
			f = new File(fileName);
			in = new BufferedReader(new InputStreamReader(new FileInputStream(f)));

			Next();

		} catch(FileNotFoundException fnfe)
		{
			System.out.println("Can not find File:" + fileName);
		} catch (IOException ioe)
		{
			System.out.println("Can not preform IO operation correctly:" + ioe);
		}

	}//End of the constructor

	///////////////////////////


	public void Next()
	{
		int temp;

		if (errorCondition)
		{
			sym = 0;
			return;
		}

		try
		{
			temp = in.read();

			if(temp == -1) //EndOfFile has been reached
			{
				sym = 255;
				return;
			}

			if ((temp == '\t') || (temp == '\n') || (temp == '\r')) //Because I don't want to handle tab or new line cases whenever I want to do file operations
			{
				sym = ' ';
				return;
			}

			else
			{
				sym = (char)temp;
				return;
			}

		}catch(IOException ioe)
		{
			System.out.println("Got stuck in in.read method" + ioe);
		}

		return;

	}//end of method Next

	///////////////////////////////////////////////////////////

	public void Error(String ErrorMsg)//Signal an Error with current file position
	{
		errorCondition = true;

		System.out.println("An error has occured");

		return;
	}

}//End of class