c-----------------------------------------------------------------------
c-----------------------------------------------------------------------
c
c     This file is part of the Test Set for IVP solvers
c     http://www.dm.uniba.it/~testset/
c
c        Problem OREGONATOR
c        ODE of dimension 3
c
c     DISCLAIMER: see
c     http://www.dm.uniba.it/~testset/disclaimer.php
c
c     The most recent version of this source file can be found at
c     http://www.dm.uniba.it/~testset/src/problems/vdpol.f
c
c     This is revision
c     $Id: orego.F,v 1.4 2006/10/06 12:12:27 testset Exp $
c
c-----------------------------------------------------------------------
      integer function pidate()
      pidate = 20060828
      return
      end
c-----------------------------------------------------------------------
      subroutine prob(fullnm,problm,type,
     +                neqn,ndisc,t,
     +                numjac,mljac,mujac,
     +                nummas,mlmas,mumas,
     +                ind)
      character*(*) fullnm, problm, type
      integer neqn,ndisc,mljac,mujac,mlmas,mumas,ind(*)
      double precision t(0:*)
      logical numjac, nummas

      fullnm = 'Problem OREGONATOR'
      problm = 'orego'
      type   = 'ODE'
      neqn   = 3
      ndisc  = 0
      t(0)   = 0d0
      t(1)   = 360.0d0
      numjac = .false.
      mljac  = neqn
      mujac  = neqn

      return
      end
c-----------------------------------------------------------------------
      subroutine init(neqn,t,y,yprime,consis)
      integer neqn
      double precision t,y(neqn),yprime(neqn)
      logical consis

         y(1) = 1d0
         y(2) = 2d0
         y(3) = 3d0
      return
      end
c-----------------------------------------------------------------------
      subroutine settolerances(neqn,rtol,atol,tolvec)
      integer neqn 
      logical tolvec
      double precision rtol(neqn), atol(neqn)
       
      tolvec  = .false.
      

      return
      end
c-----------------------------------------------------------------------
      subroutine setoutput(neqn,solref,printsolout,
     +                     nindsol,indsol)

      logical solref, printsolout
      integer neqn, nindsol
      integer indsol(neqn)

c the reference solution is available
      solref = .true.  

c output file is required
      printsolout = .true.

c default values if printsolout is .true.
      nindsol = neqn
c only nindsol component of indsol are referenced
      do i=1,nindsol
          indsol(i) = i
      end do  

  

      return
      end

c-----------------------------------------------------------------------
      subroutine feval(neqn,t,y,yprime,f,ierr,rpar,ipar)
      integer neqn,ierr,ipar(*)
      double precision t,y(neqn),yprime(neqn),f(neqn),rpar(*)

    
      f(1)=77.27D0*(y(2)+y(1)*(1.D0-8.375D-6*y(1)-y(2)))
      f(2)=(y(3)-(1.D0+y(1))*y(2))/77.27D0
      f(3)=0.161D0*(y(1)-y(3))
      return
      end
c-----------------------------------------------------------------------
      subroutine jeval(ldim,neqn,t,y,yprime,dfdy,ierr,rpar,ipar)
      integer ldim,neqn,ierr,ipar(*)
      double precision t,y(neqn),yprime(neqn),dfdy(ldim,neqn),rpar(*)

      integer i,j

      do 20 j=1,neqn
         do 10 i=1,neqn
            dfdy(i,j)=0d0
   10    continue
   20 continue

     
        dfdy(1,1)=77.27D0*(1.D0-2.D0*8.375D-6*y(1)-y(2))
        dfdy(1,2)=77.27D0*(1.D0-y(1))
        dfdy(1,3)=0.D0
        dfdy(2,1)=-y(2)/77.27D0
        dfdy(2,2)=-(1.D0+y(1))/77.27D0
        dfdy(2,3)=1.D0/77.27D0
        dfdy(3,1)=.161D0
        dfdy(3,2)=.0D0
        dfdy(3,3)=-.161D0
      return
      end
c-----------------------------------------------------------------------
      subroutine meval(ldim,neqn,t,y,yprime,dfddy,ierr,rpar,ipar)
      integer ldim,neqn,ierr,ipar(*)
      double precision t,y(neqn),yprime(neqn),dfddy(ldim,neqn),rpar(*)
c
c     dummy subroutine
c
      return
      end
c-----------------------------------------------------------------------
      subroutine solut(neqn,t,y)
      integer neqn
      double precision t,y(neqn)
c
c
c computed using double precision RADAU on an 
c     Alphaserver DS20E, with a 667 MHz EV67 processor.
c          
c          uround = 1.01d-19
c          rtol  = h0 = 1.1d-18, atol = 1.1d-40
c
c
      y(1) =  0.1000814870318523D+001            
      y(2) =  0.1228178521549917D+004             
      y(3) =  0.1320554942846706D+003            


      return
      end