#pragma region CPL License
/*
Nuclex Native Framework
Copyright (C) 2002-2013 Nuclex Development Labs

This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
IBM Common Public License for more details.

You should have received a copy of the IBM Common Public
License along with this library
*/
#pragma endregion // CPL License

#ifndef NUCLEX_STORAGE_FILESYSTEM_WINDOWS_DATEHELPER_H
#define NUCLEX_STORAGE_FILESYSTEM_WINDOWS_DATEHELPER_H

#include "Nuclex/Storage/Config.h"

#if defined(NUCLEX_STORAGE_WIN32)

#include "../../Helpers/WindowsApi.h" // includes minimal Windows.h for ::FILETIME

#include <cstdint> // for std::uint64_t
#include <ctime> // for std::time_t

namespace Nuclex { namespace Storage { namespace FileSystem { namespace Windows {

  // ------------------------------------------------------------------------------------------- //

  /// <summary>Some helper methods for dealing with date and time</summary>
  class DateHelper {

    /// <summary>Converts a Microsoft FILETIME into a Posix time stamp</summary>
    /// <param name="fileTime">
    ///   File timestamp reported by a Microsoft API
    /// </param>
    /// <returns>The equivalent date and time in Posix time format</returns>
    public: static std::time_t PosixTimeFromFileTime(const ::FILETIME &fileTime);

#if 0
    /// <summary>Converts a Microsoft FILETIME into a Posix time stamp</summary>
    /// <param name="fileTimeHigh">
    ///   Upper 32 bits of the date and time in Microsoft FILETIME format
    /// </param>
    /// <param name="fileTimeLow">
    ///   Lower 32 bits of the date and time in Microsoft FILETIME format
    /// </param>
    /// <returns>The equivalent date and time in Posix time format</returns>
    public: static std::time_t PosixTimeFromFileTime(
      std::uint32_t fileTimeHigh, std::uint32_t fileTimeLow
    );
#endif

    /// <summary>Converts a Microsoft FILETIME into a Posix time stamp</summary>
    /// <param name="fileTime">Date and time in Microsoft FILETIME format</param>
    /// <returns>The equivalent date and time in Posix time format</returns>
    public: static std::time_t PosixTimeFromFileTime(
      std::uint64_t fileTime
    );

  };

  // ------------------------------------------------------------------------------------------- //

}}}} // namespace Nuclex::Storage::FileSystem::Windows

#endif // defined(NUCLEX_STORAGE_WIN32)

#endif // NUCLEX_STORAGE_FILESYSTEM_WINDOWS_DATEHELPER_H