# Copyright 2005-2019 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.
#

position startOfHeaders;

ascii[4] SOH : hidden;
ascii[3] nnn : dump;
ascii[3] crcrlf : hidden;
ascii[2] TT : dump;
ascii[2] AA : dump;
ascii[2] II : dump;
ascii[1] sp1 : hidden;
ascii[4] CCCC : dump;
ascii[1] sp2 : hidden;
ascii[2] YY : dump;
ascii[2] GG : dump;
ascii[2] gg : dump;

lookup[2] lBB (29,BB);
if (lBB is 'RR' || lBB is 'CC' || lBB is 'AA' ) {
    ascii[1] sp3 : hidden;
    ascii[3] BBB : dump;
} else {
    constant BBB="NNN";
}
alias ls.BBB=BBB;

alias ls.count=count;
alias ls.TT=TT;
alias ls.AA=AA;
alias ls.II=II;
alias ls.CCCC=CCCC;
alias ls.YY=YY;
alias ls.GG=GG;
alias ls.gg=gg;
position   endOfHeadersMarker;

message[4] theMessage;

meta lengthOfHeaders evaluate( endOfHeadersMarker-startOfHeaders);
meta md5Headers md5(startOfHeaders,lengthOfHeaders);

ascii[4]  endMark;
position totalLength; 
alias ls.totalLength=totalLength;

