MultiFileBlob.h

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#ifndef CondFormats_MultiFileBlob_h
#define CondFormats_MultiFileBlob_h

#include <vector>
#include <string>
#include <map>
#include <iosfwd>

class MultiFileBlob{

 public:
  typedef std::pair<unsigned char const *, unsigned char const *> Range;
 
  MultiFileBlob();

  ~MultiFileBlob();

  void finalized(bool compress);

  // void read(const std::string& name, const std::string& fname);
  // void write(const std::string& name, const std::string& fname) const;
  
  void read(const std::string& name, std::istream & is);
  void write(const std::string& name, std::ostream & os) const;

  // return blob
  Range rawBlob(const std::string& name) const;

  bool isCompressed() const {return compressed;}

  unsigned long long fullSize() const {return isize;}

  unsigned long long size(const std::string& name) const;



                                 
 private:
  // expand locally;
  void expand();

  // static unsigned int computeFileSize(const std::string & ifile);
  // static unsigned int computeStreamSize(std::istream & is);

  std::vector<unsigned char> blob;
  typedef std::map<std::string, unsigned long long> Positions;
  Positions positions;
  bool compressed; // persistent status
  unsigned long long isize;
  bool expanded; // transient status
};

#endif