Simplify stdmsg.f90. (Will it still be OK for the 72-bit modes?)

lib/stdmsg.f90

@@ -2,15 +2,6 @@ function stdmsg(msg0)
 
   ! Returns .true. if msg0 a standard "JT-style" message
   
-  ! itype
-  !  1     Standard 72-bit structured message
-  !  2     Type 1 prefix
-  !  3     Type 1 suffix
-  !  4     Type 2 prefix
-  !  5     Type 2 suffix
-  !  6     Free text
-  !  7     Hashed calls (MSK144 short format)
-
   ! i3.n3
   !  0.0   Free text
   !  0.1   DXpeditiion mode
@@ -27,23 +18,26 @@ function stdmsg(msg0)
 
   use iso_c_binding, only: c_bool
   use packjt
-  character*37 msg0,msg1,msg
-  integer dat(12)
+  use packjt77
+
+  character*37 msg0,msg1
+  character*77 c77
   logical(c_bool) :: stdmsg
 
   msg1=msg0
-  i0=index(msg1,' OOO ')
-  if(i0.gt.10) msg1=msg0(1:i0)
-  call packmsg(msg0,dat,itype)
-  call unpackmsg(dat,msg)
-  msg(23:37)='               '
-  stdmsg=(msg(1:22).eq.msg1(1:22)) .and. (itype.ge.0) .and. (itype.ne.6)
-  if(.not.stdmsg) then
-     i0=index(msg1,'  ')
-     msg1(i0:)='                    '
-     call parse77(msg1,i3,n3)
-     if(i3.gt.0 .or. n3.gt.0) stdmsg=.true.
-  endif
+  i3=-1
+  n3=-1
+  call pack77(msg1,i3,n3,c77)
+  stdmsg=(i3.gt.0 .or. n3.gt.0)
 
+!###
+!  rewind 82
+!  do i=1,nzhash
+!     write(82,3082) i,nzhash,callsign(i)
+!3082 format(2i5,2x,a13)
+!  enddo
+!  flush(82)
+!###
+  
   return
 end function stdmsg