FileDescriptor.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2013 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#pragma once
 
#include "MantidKernel/DllConfig.h"
 
#include <fstream>
#include <stdio.h>
#include <string>
 
namespace Mantid {
namespace Kernel {
 
class MANTID_KERNEL_DLL FileDescriptor {
public:
  static bool isAscii(const std::string &filename, const size_t nbytes = 256);
  static bool isAscii(std::istream &data, const size_t nbytes = 256);
  static bool isAscii(FILE *file, const size_t nbytes = 256);
  static bool isEmpty(const std::string &filename);
 
public:
  FileDescriptor(const std::string &filename);
  ~FileDescriptor();
 
  FileDescriptor() = delete;
 
  FileDescriptor(const FileDescriptor &) = delete;
 
  FileDescriptor &operator=(const FileDescriptor &) = delete;
 
  inline const std::string &filename() const { return m_filename; }
  inline const std::string &extension() const { return m_extension; }
  inline bool isAscii() const { return m_ascii; }
  bool isXML() const;
  inline std::istream &data() { return m_file; }
  void resetStreamToStart();
 
private:
  void initialize(const std::string &filename);
 
  std::string m_filename;
  std::string m_extension;
  std::ifstream m_file;
  bool m_ascii;
};
 
} // namespace Kernel
} // namespace Mantid