mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-01 16:13:57 -04:00
5b54b41174
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6419 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
67 lines
1.7 KiB
Fortran
67 lines
1.7 KiB
Fortran
subroutine genmsk_short(msg,msgsent,ichk,itone,itype)
|
|
|
|
use hashing
|
|
character*22 msg,msgsent
|
|
character*3 crpt,rpt(0:7)
|
|
logical first
|
|
integer itone(35)
|
|
integer ig24(0:4096-1) !Codewords for Golay (24,12) code
|
|
integer b11(11)
|
|
data b11/1,1,1,0,0,0,1,0,0,1,0/ !Barker 11 code
|
|
data rpt /'26 ','27 ','28 ','R26','R27','R28','RRR','73 '/
|
|
data first/.true./
|
|
save first,ig24
|
|
|
|
if(first) then
|
|
call golay24_table(ig24) !Define the Golay(24,12) codewords
|
|
first=.false.
|
|
endif
|
|
|
|
itype=-1
|
|
msgsent='*** bad message ***'
|
|
itone=0
|
|
i1=index(msg,'>')
|
|
if(i1.lt.9) go to 900
|
|
call fmtmsg(msg,iz)
|
|
crpt=msg(i1+2:i1+5)
|
|
do i=0,7
|
|
if(crpt.eq.rpt(i)) go to 10
|
|
enddo
|
|
go to 900
|
|
|
|
10 irpt=i !Report index, 0-7
|
|
if(ichk.lt.10000) then
|
|
call hash(msg(2:i1-1),i1-2,ihash)
|
|
ihash=iand(ihash,511) !9-bit hash for the two callsigns
|
|
ig=8*ihash + irpt !12-bit message information
|
|
else
|
|
ig=ichk-10000
|
|
endif
|
|
ncodeword=ig24(ig)
|
|
itone(1:11)=b11 !Insert the Barker-11 code
|
|
n=2**24
|
|
do i=12,35 !Insert codeword into itone array
|
|
n=n/2
|
|
itone(i)=0
|
|
if(iand(ncodeword,n).ne.0) itone(i)=1
|
|
enddo
|
|
msgsent=msg
|
|
itype=7
|
|
|
|
n=count(itone(1:35).eq.0)
|
|
if(mod(n,2).ne.0) stop 'Parity error in genmsk_short.'
|
|
|
|
900 return
|
|
end subroutine genmsk_short
|
|
|
|
subroutine hash_calls(calls,ih9)
|
|
|
|
use hashing
|
|
character*(*) calls
|
|
i1=index(calls,'>')
|
|
call hash(calls(2:i1-1),i1-2,ih9)
|
|
ih9=iand(ih9,511) !9-bit hash for the two callsigns
|
|
|
|
return
|
|
end subroutine hash_calls
|