# 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 'grib1/7.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 ijDirectionIncrementGiven(resolutionAndComponentFlags,7) = 1 ;

# For grib 1 to 2
alias iDirectionIncrementGiven = ijDirectionIncrementGiven;
alias jDirectionIncrementGiven = ijDirectionIncrementGiven;
alias DiGiven = ijDirectionIncrementGiven;
alias DjGiven = ijDirectionIncrementGiven;

flagbit earthIsOblate(resolutionAndComponentFlags,6) : dump;
if (earthIsOblate) {
  # Earth assumed oblate spheroidal with size as determined by IAU in 1965
  transient earthMajorAxis = 6378160.0;
  transient earthMinorAxis = 6356775.0;
  alias earthMajorAxisInMetres=earthMajorAxis;
  alias earthMinorAxisInMetres=earthMinorAxis;
}


flagbit resolutionAndComponentFlags3(resolutionAndComponentFlags,5) = 0: read_only;
flagbit resolutionAndComponentFlags4(resolutionAndComponentFlags,4) = 0: read_only;

flagbit uvRelativeToGrid(resolutionAndComponentFlags,3) : dump;

flagbit resolutionAndComponentFlags6(resolutionAndComponentFlags,2) = 0: read_only;
flagbit resolutionAndComponentFlags7(resolutionAndComponentFlags,1) = 0: read_only;
flagbit resolutionAndComponentFlags8(resolutionAndComponentFlags,0) = 0: read_only;
