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program jt4code
! Provides examples of message packing, bit and symbol ordering,
! convolutional encoding, and other necessary details of the JT4
! protocol.
use jt4
use packjt
character*22 msg,decoded,bad*1,msgtype*13
integer i4tone(206)
include 'testmsg.f90'
nargs=iargc()
if(nargs.ne.1) then
print*,'Usage: jt4code "message"'
print*,' jt4code -t'
go to 999
endif
call getarg(1,msg)
nmsg=1
if(msg(1:2).eq."-t") nmsg=NTEST
write(*,1010)
1010 format(" Message Decoded Err? Type"/ &
74("-"))
do imsg=1,nmsg
if(nmsg.gt.1) msg=testmsg(imsg)
call fmtmsg(msg,iz) !To upper case, collapse multiple blanks
ichk=0
call gen4(msg,ichk,decoded,i4tone,itype)
msgtype=""
if(itype.eq.1) msgtype="Std Msg"
if(itype.eq.2) msgtype="Type 1 prefix"
if(itype.eq.3) msgtype="Type 1 suffix"
if(itype.eq.4) msgtype="Type 2 prefix"
if(itype.eq.5) msgtype="Type 2 suffix"
if(itype.eq.6) msgtype="Free text"
bad=" "
if(decoded.ne.msg) bad="*"
write(*,1020) imsg,msg,decoded,bad,itype,msgtype
1020 format(i2,'.',2x,a22,2x,a22,3x,a1,i3,": ",a13)
enddo
if(nmsg.eq.1) write(*,1030) i4tone
1030 format(/'Channel symbols'/(30i2))
999 end program jt4code
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