DataExportBuffer.h

Go to the documentation of this file.

/*
  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef TRIGACCELEVENT_DATAEXPORTBUFFER_H
#define TRIGACCELEVENT_DATAEXPORTBUFFER_H
 
 
#include <string>
#include <fstream>
 
namespace TrigAccel {
 
  typedef struct DataExportBuffer {
  public:
    DataExportBuffer() : m_size(0), m_buffer(0) {};
    DataExportBuffer(size_t s) : m_size(s) {
      m_buffer = new char[s];
    }
    ~DataExportBuffer() {delete[] m_buffer;}
 
    // no copy/assign
    DataExportBuffer(const DataExportBuffer&) = delete;
    DataExportBuffer& operator=(const DataExportBuffer&) = delete;
 
    inline bool fit(size_t s) {
      return s<=m_size;
    }
 
    void reallocate(size_t s) {
      delete[] m_buffer;
      m_buffer = new char[s];
      m_size = s;
    }
 
    void save(const std::string& name) const {
      std::ofstream binFile(name, std::ios::binary);
      binFile.write(m_buffer, m_size);
      binFile.close();
    }
 
    size_t load(const std::string& name) {
      std::ifstream binFile(name, std::ios::binary);
      if (!binFile) {
    return 0;
      }
      binFile.seekg(0, binFile.end);
      size_t fileSize = binFile.tellg();
      binFile.seekg (0, binFile.beg);
      reallocate(fileSize);
      binFile.read(m_buffer, m_size);
      binFile.close();
      return fileSize;
    }
 
    size_t m_size;
    char* m_buffer;
  } DATA_EXPORT_BUFFER;
}
 
#endif