mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-17 17:42:02 -05:00
55 lines
1.2 KiB
Fortran
55 lines
1.2 KiB
Fortran
program t1
|
|
|
|
real x(13)
|
|
real(KIND=16) :: dlong,dlong0
|
|
character wd*13,w*13,error*5
|
|
character c*44 !NB: 44^13 = 2^(70.973)
|
|
data c/' 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ+-./?@$'/
|
|
|
|
nargs=iargc()
|
|
if(nargs.ne.1) then
|
|
print*,'Usage: t1 "FreeText13"'
|
|
print*,' t1 <iters>'
|
|
go to 999
|
|
endif
|
|
call getarg(1,w)
|
|
iters=1
|
|
read(w,*,err=10) iters
|
|
10 continue
|
|
|
|
do iter=1,iters
|
|
if(iters.gt.1) then
|
|
! Create a random free-text word
|
|
call random_number(x)
|
|
do i=1,13
|
|
j=44*x(i) + 1
|
|
w(i:i)=c(j:j)
|
|
enddo
|
|
endif
|
|
! Encode a 13-character free-text message into a 71-bit integer.
|
|
dlong=0.d0
|
|
do i=1,13
|
|
n=index(c,w(i:i))-1
|
|
dlong=44.d0*dlong + n
|
|
enddo
|
|
dlong0=dlong
|
|
|
|
! Decode a a 71-bit integer into a 13-character free-text message.
|
|
do i=13,1,-1
|
|
j=mod(dlong,44.d0)+1.d0
|
|
wd(i:i)=c(j:j)
|
|
dlong=dlong/44.d0
|
|
enddo
|
|
|
|
|
|
error=' '
|
|
if(wd.ne.w) then
|
|
error='ERROR'
|
|
write(*,1010) w,dlong0,wd,error
|
|
1010 format('"',a13,'"',f25.1,2x,'"',a13'"',2x,a5)
|
|
endif
|
|
if(mod(iter,1000).eq.0) print*,iter
|
|
enddo
|
|
|
|
999 end program t1
|