🚀 go-pugleaf

You can sometimes check the file BEFORE you take action,
and sure you can take actions AFTER an unsuccessful try.
These are some functions that I sometimes use BEFORE I
take some action:


bool IsFileOccupied( const char* s )
{
   try
   {
      TFileStream *tStream = new TFileStream( AnsiString( s ),
                                              fmOpenRead|fmShareExclusive );
      delete tStream;
      return( false );
   }
   catch (...)
   {
      return( true );
   }
}

bool CheckIfFileExists( const char* s )
{
   return access( s, 0 ) == 0;
}


bool IsFileReadOnly( const char* s )
{
   return access( s, 02 ) != 0;
}

bool IsFileReadable( const char* AFilename )
{
   FILE *fp;
   fp = fopen( AFilename, "r" );
   if ( fp == 0 )
      return ( false );
   else
   {
      fclose( fp );
      return ( true );
   }
}

bool IsFileWritable(const char* fileName)
{
   if ( access( fileName, 02 ) == 0)
      return ( true );
   if ( errno == ENOENT ) // we know now it doesnt exist
   {
      FILE *fp = fopen( fileName, "a" );
      if ( fp )
      {
         fclose( fp );
         unlink( fileName );
         return ( true );
      }
   }
   return ( false );
}





Best regards,
Vladimir Stefanovic