src/windows/File.cpp (3e57fe4) - Blinker · BlinkenArea

File.cpp

/* Blinker
   Copyright 2011-2014 Stefan Schuermans <stefan@blinkenarea.org>
   Copyleft GNU public license - http://www.gnu.org/copyleft/gpl.html
   a blinkenarea.org project */

#include <string>
#include <windows.h>

#include "File.h"
#include "Time.h"

namespace Blinker {

/**
 * @brief constructor from path
 * @param[in] path path to file
 */
File::File(const std::string &path):
  m_path(path)
{
  // get modification time
  checkModified();
}

/**
 * @brief get path to file
 * @return path to file
 */
const std::string & File::getPath()
{
  return m_path;
}

/**
 * @brief check if file has been modified
 * @return if file has been modified since last check
 */
bool File::checkModified()
{
  // get handle to file
  HANDLE handle = CreateFile(m_path.c_str(), GENERIC_READ,
                             FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
                             OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
  if (handle == INVALID_HANDLE_VALUE) {
    return false; // cannot open -> silently ignore
  }

// get last write time
  FILETIME wrTime;
  if (! GetFileTime(handle, NULL, NULL, &wrTime)) {
    CloseHandle(handle);
    return false; // cannot get last write time -> silently ignore
  }

// close handle
  CloseHandle(handle);

// modification time is last write time
  Time modifyTime;
  modifyTime.fromFileTime(wrTime);

// consider file modified if modify time changed since last check
  bool mod = modifyTime > m_lastModifyTime;

// remember new modify time
  m_lastModifyTime = modifyTime;

return mod;
}

} // namespace Blinker

Blinker

implement file and time for Windows