WSJT-X/lib/77bit/free_text.f90
2020-06-21 14:38:40 -04:00

59 lines
1.3 KiB
Fortran

program free_text
character*13 c13,w
character*71 f71
character*42 c
character*1 qa(10),qb(10)
data c/' 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ+-./?'/
c13='TNX BOB 73 GL' !Redefine as needed
call mp_short_init
qa=char(0)
w=adjustr(c13)
do i=1,13
j=index(c,w(i:i))-1
if(j.lt.0) j=0
call mp_short_mult(qb,qa(2:10),9,42) !qb(1:9)=42*qa(2:9)
call mp_short_add(qa,qb(2:10),9,j) !qa(1:9)=qb(2:9)+j
enddo
write(f71,1000) qa(2:10)
1000 format(b7.7,8b8.8)
write(*,1010) c13,f71
1010 format('Free text: ',a13/'f71: ',a71)
end program free_text
subroutine mp_short_ops(w,u)
! Multi-precision arithmetic with storage in character arrays.
character*1 w(*),u(*)
integer i,ireg,j,n,ir,iv,ii1,ii2
character*1 creg(4)
save ii1,ii2
equivalence (ireg,creg)
entry mp_short_init
ireg=256*ichar('2')+ichar('1')
do j=1,4
if (creg(j).eq.'1') ii1=j
if (creg(j).eq.'2') ii2=j
enddo
return
entry mp_short_add(w,u,n,iv)
ireg=256*iv
do j=n,1,-1
ireg=ichar(u(j))+ichar(creg(ii2))
w(j+1)=creg(ii1)
enddo
w(1)=creg(ii2)
return
entry mp_short_mult(w,u,n,iv)
ireg=0
do j=n,1,-1
ireg=ichar(u(j))*iv+ichar(creg(ii2))
w(j+1)=creg(ii1)
enddo
w(1)=creg(ii2)
return
return
end subroutine mp_short_ops