SeqFile.h

//+
// File : seqfile.h
// Description : Blocked file management for sequential binary I/O
//
// Author : Ryosuke Itoh, IPNS, KEK
// Date : 28 - Aug - 2003
//-
 
#pragma once
 
#include <iosfwd>
#include <memory>
#include <string>
 
namespace Belle2 {
  class SeqFile {
  public:
    SeqFile(const std::string& filename, const std::string& rwflag,
            char* streamerinfo = NULL, int streamerinfo_size = 0,
            bool filenameIsPattern = false);
    ~SeqFile();
    SeqFile(const SeqFile&) = delete;
    SeqFile& operator=(const SeqFile&) = delete;
    int status() const;
 
    int write(const char* buf);
    int read(char* buf, int max);
 
  private:
    void openFile(std::string filename, bool readonly);
 
  private:
    const static int c_MaxFileSize {512000000 * 4};
 
    std::string m_filename; 
    std::string m_filenamePattern; 
    int m_fd{ -1}; 
    int m_nb{0}; 
    int m_nfile{0}; 
    bool m_compressed{false}; 
    std::unique_ptr<std::ios> m_stream; 
    char* m_streamerinfo;
 
    int m_streamerinfo_size;
 
  };
 
}