/*!
 * @file zip.h
 * @brief Definition of the Zip singleton Class
 */

#ifndef _ZIP_H
#define _ZIP_H

#include <zlib.h>
#include <string>
#include <vector>

#include "netdefs.h"

struct DictionaryEntry
{
  byte * dict;
  int    dictLen;
  uLong  adler;
};

//! A class for compressing/uncompressing packes.
class Zip 
{
  public:
    virtual ~Zip(void);
    /** @returns a Pointer to the only object of this Class */
    inline static Zip* getInstance(void) { if (!singletonRef) singletonRef = new Zip();  return singletonRef; };
    
    bool loadDictionary( std::string name );
    int zip( byte * from, int fromLength, byte * to, int maxLength, int dict = 0 );
    int unZip( byte * from, int fromLength, byte * to, int maxLength );
    
    int getDictCount(){ return dicts.size(); }

  private:
    Zip();
    static Zip* singletonRef;
    
    std::vector<DictionaryEntry> dicts;
};

#endif /* _PROTO_SINGLETON_H */