watchfile.h

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#ifndef ZYPP_CORE_FS_WATCHFILE_H
#define ZYPP_CORE_FS_WATCHFILE_H
 
#include <iosfwd>
 
#include <zypp/PathInfo.h>
 
namespace zypp
{ 
 
  //
  //    CLASS NAME : WatchFile
  //
  class WatchFile
  {
    public:
      enum Initial { NO_INIT, INIT };
 
    public:
      WatchFile( const Pathname & path_r = Pathname(),
                 Initial mode            = INIT )
      : _path( path_r )
      { ctorInit( mode ); }
 
      WatchFile( Pathname && path_r, Initial mode = INIT )
      : _path( std::move(path_r) )
      { ctorInit( mode ); }
 
      const Pathname & path() const
      { return _path; }
 
      off_t  lastSize() const
      { return _size;}
 
      time_t lastMtime() const
      { return _mtime; }
 
      bool isDirty() const
      {
        PathInfo pi( _path );
        return( _size != pi.size() || _mtime != pi.mtime() );
      }
 
      bool hasChanged()
      {
        PathInfo pi( _path );
        if ( _size != pi.size() || _mtime != pi.mtime() )
        {
          _size = pi.size();
          _mtime = pi.mtime();
          return true;
        }
        return false;
      }
 
    private:
      void ctorInit( Initial mode )
      {
        PathInfo pi( mode == INIT ? _path : Pathname() );
        _size  = pi.size();
        _mtime = pi.mtime();
      }
 
    private:
      Pathname _path;
      off_t  _size;
      time_t _mtime;
  };
 
} // namespace zypp
#endif // ZYPP_CORE_FS_WATCHFILE_H