File: ftree2.f

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scilab 4.0-12
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      subroutine ftree2(vec,nb,deput,outoin,outoinptr,
c     Copyright INRIA
     $     ord,nord,ok)
c make sure nb > 0
      integer vec(*),nb,deput(*),outoin(*),outoinptr(*)
      integer ord(*),nord,ok,fini
c
      ok=1
      do 150 j=1,nb+2
         fini=1
         do 100 i=1,nb
            if(vec(i).eq.j-1) then
               if(j.eq.nb+2) then
                  ok=0
                  nord=0
                  return
               endif
               if(outoinptr(i+1)-outoinptr(i).ne.0) then
                  do 60 k=outoinptr(i),outoinptr(i+1)-1
                     ii=outoin(k)
                     if((vec(ii).gt.-1).AND.(deput(ii).eq.1)
     $                    ) then
                        fini=0
                        vec(ii)=j
                     endif
 60               continue
               endif
            endif
 100     continue
         if(fini.eq.1) goto 200
 150  continue
 200  continue
      do 202 m=1,nb
         vec(m)=-vec(m)
 202  continue 
      call isort(vec,nb,ord)
      do 300 m=1,nb
      if(vec(m).lt.1) then
         if(m.eq.1) then
            nord=nb
            return
         else
            nord=nb-m+1
            do 250 mm=1,nord
               ord(mm)=ord(mm+nb-nord)
 250        continue
            return
         endif
      endif
 300  continue
      nord=0
      return
      end