# Copyright 2005-2017 ECMWF.
#
# This software is licensed under the terms of the Apache Licence Version 2.0
# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
# 
# In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
# virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
#

#  Resolution and component flags
flags[1] resolutionAndComponentFlags 'grib2/tables/[tablesVersion]/3.3.table' : edition_specific,no_copy;

# Note our flagbit numbers run from 7 to 0, while WMO convention uses 1 to 8
# (most significant to least significant)

flagbit resolutionAndComponentFlags1(resolutionAndComponentFlags,7) = 0: read_only;
flagbit resolutionAndComponentFlags2(resolutionAndComponentFlags,6) = 0: read_only;
flagbit iDirectionIncrementGiven(resolutionAndComponentFlags,5);
flagbit jDirectionIncrementGiven(resolutionAndComponentFlags,4);
flagbit uvRelativeToGrid(resolutionAndComponentFlags,3);
flagbit resolutionAndComponentFlags6(resolutionAndComponentFlags,7) = 0: read_only;
flagbit resolutionAndComponentFlags7(resolutionAndComponentFlags,6) = 0: read_only;
flagbit resolutionAndComponentFlags8(resolutionAndComponentFlags,6) = 0: read_only;

concept ijDirectionIncrementGiven {
  '1' = {
    iDirectionIncrementGiven = 1;
    jDirectionIncrementGiven = 1;
  }
  '0' = {
    iDirectionIncrementGiven = 1;
    jDirectionIncrementGiven = 0;
  }
  '0' = {
    iDirectionIncrementGiven = 0;
    jDirectionIncrementGiven = 1;
  }
  '0' = {
    iDirectionIncrementGiven = 0;
    jDirectionIncrementGiven = 0;
  }
}

alias DiGiven=iDirectionIncrementGiven;
alias DjGiven=jDirectionIncrementGiven;