import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.*;
import java.io.*;
import java.util.*;


public class Datei {
  int ib = 0;
  int iLength = 0;
  byte buffer[] = new byte[1000000];
  byte searchBuffer[] = new byte[1000000];
  String dateiname = "";
  String pfad= "";
  
  public Datei () {
    dateiname = "unbenannt.txt";
  }
  public Datei (File file) {
    try {
      buffer = new byte[(int) file.length()+100000];
      searchBuffer = new byte[(int) file.length()+100000];
      FileInputStream inFile = new FileInputStream(file);
      //BufferedReader  inData = new BufferedReader(new InputStreamReader(inFile));
      
      //if (inData.ready()) {
      iLength = inFile.read(buffer);
      for (int i=0; i< iLength; i++) searchBuffer[i]=0;
      
      //inData.close();
      inFile.close();
      dateiname = file.getName();
      pfad = file.getAbsolutePath();
      
      //} else {
      //System.out.println("Fehler beim Dateiöffnen");
      //}
    }
    catch (Exception ex) {
      System.out.println("Fehler beim Dateiöffnen");
    }
    
  }
  
  public void saveFile(File file) {
    try {
      FileOutputStream outFile = new FileOutputStream(file);
      //BufferedReader  inData = new BufferedReader(new InputStreamReader(inFile));
      
      //if (inData.ready()) {
      outFile.write(buffer,0,iLength);
      //inData.close();
      outFile.close();
      dateiname = file.getName();
      pfad = file.getAbsolutePath();
      
      //} else {
      //System.out.println("Fehler beim Dateiöffnen");
      //}
    }
    catch (Exception ex) {
      System.out.println("Fehler beim Dateiöffnen");
    }
    
  }
  
  public String getFileName()
  {
    return dateiname;
  }
  
  public String getPathName()
  {
    return dateiname;
  }
  
  public String getByteBinary(int i)
  {
    String s = "";
    if (i<this.iLength) {
      byte c = buffer[i];
      String p = "00000000";
      s = Integer.toBinaryString(c);
      if (s.length()==32) {
        s = s.substring(24);
      }
      s = p.substring(0,8-s.length())+s;
    }
    return s;
  }
  
  public void setByteBinary(int i, String s)
  {
    if(i<iLength) buffer[i]=(byte) Integer.parseInt(s,2);
  }
  
  public String getByteHex(int i)
  {
    String s = "";
    if (i<this.iLength) {
      byte c = buffer[i];
      s = Integer.toHexString(c);
      s = s.toUpperCase();
      if (s.length()<2) {
        s = "0"+s;
      }
      if (s.length()==8) {
        s = s.substring(6);
      }
    }
    return s;
  }
  
  public void setByteHex(int i, String s)
  {
    if (i<this.iLength) {
      buffer[i]=(byte) Integer.parseInt(s,16);
    }
  }
  
  public String getByteChar(int i)
  {
    String s="";
    if (i<this.iLength) {
      int j = (0x000000FF & ((int)buffer[i]));
      s = ""+(char) j;
    }
    return s;
  }
  
  public void setByteChar(int i, char c)
  {
    if (i<this.iLength) {
      buffer[i] = (byte) c;
    }
  }
  
  public byte getByte(int i)
  {
    if (i<this.iLength) {
      return buffer[i];
    } else {
      return 0;
    } // end of if-else
    
  }
  
  public byte getSearchByte(int i)
  {
    return searchBuffer[i];
  }
  
  public String getBinary()
  {
    String s = "";
    
    for (int i = 0; i< iLength; i++)
    {
      s = s + getByteBinary(i);
      
    }
    return s;
  }
  
  public String getHex()
  {
    String s = "";
    
    for (int i = 0; i< iLength; i++)
    {
      s = s + getByteHex(i);
    }
    return s;
  }
  
  public int getLength()
  {
    return iLength;
  }
  
  public void insertByte(int pos) {
    for (int i=iLength; i>= pos; i--) buffer[i+1]=buffer[i];
    buffer[pos]=0;
    iLength++;
  }
  public void deleteByte(int pos) {
    for (int i=pos; i< iLength; i++) buffer[i]=buffer[i+1];
    buffer[iLength]=0;
    iLength--;
  }
  
  
  public int search(String s, int modus) {
    byte searchBytes[] = new byte[50];
    int  searchLength = 0;
    int i, treffer, laenge=0;
    
    for (i=0; i< iLength;i++) searchBuffer[i]=0;
    i = 0;
    
    if (modus==1) laenge = 8;
    if (modus==2) laenge = 2;
    if (modus==3) laenge = 1;
    
    while(s.length() >= laenge) {
      if (modus==1) {
        searchBytes[i] = (byte) Integer.parseInt(s.substring(0,8),2);
      }
      if (modus==2) {
        searchBytes[i] = (byte) Integer.parseInt(s.substring(0,2),16);
      }
      if (modus==3) {
        searchBytes[i] = (byte) s.charAt(0);
      }
      if (s.length()>laenge) {
        s = s.substring(laenge);
      } else  s = "";
      i++;
    }
    searchLength = i;
    
    if (s.length()==0) {
      treffer=0;
      for(int j = 0; j< iLength-searchLength; j++)
      {
        int gefunden = 1;
        for (i = 0; (i < searchLength) && (gefunden==1); i++)
        {
          if (buffer[j+i]!= searchBytes[i]) gefunden = 0;
        }
        
        if (gefunden==1) {
          for (i=0; i<searchLength; i++) searchBuffer[j+i] = 1;
          treffer++;
        }
      }
    }
    else treffer = -1;
    return treffer;
  }
  
  public int compare (File file) {
    int  cLength = 0;
    byte cbuffer[];
    int  unterschiede=0;
    
    for (int i=0; i< iLength;i++) searchBuffer[i]=0;
    try {
      FileInputStream inFile = new FileInputStream(file);
      cbuffer = new byte[(int) file.length()];
      cLength = inFile.read(cbuffer);
      inFile.close();
      if (iLength < cLength) cLength = iLength;
      for (int i=0; i <cLength; i++) {
        if (buffer[i] != cbuffer[i]) {
          searchBuffer[i] = 1;
          unterschiede++;
        }
      }
    }
    catch (Exception ex) {
      System.out.println("Fehler beim Dateiöffnen");
      unterschiede = -1;
    }
    return unterschiede;
  }
  
  
}