WSJT-X/unpackcall.f

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subroutine unpackcall(ncall,word)
character word*12,c*37
data c/'0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ '/
n=ncall
word='......'
if(n.ge.262177560) go to 999 !Plain text message ...
i=mod(n,27)+11
word(6:6)=c(i:i)
n=n/27
i=mod(n,27)+11
word(5:5)=c(i:i)
n=n/27
i=mod(n,27)+11
word(4:4)=c(i:i)
n=n/27
i=mod(n,10)+1
word(3:3)=c(i:i)
n=n/10
i=mod(n,36)+1
word(2:2)=c(i:i)
n=n/36
i=n+1
word(1:1)=c(i:i)
do i=1,4
if(word(i:i).ne.' ') go to 10
enddo
go to 999
10 word=word(i:)
999 if(word(1:3).eq.'3D0') word='3DA0'//word(4:)
return
end