!-------------------------------------- LICENCE BEGIN ------------------------------------
!Environment Canada - Atmospheric Science and Technology License/Disclaimer, 
!                     version 3; Last Modified: May 7, 2008.
!This is free but copyrighted software; you can use/redistribute/modify it under the terms 
!of the Environment Canada - Atmospheric Science and Technology License/Disclaimer 
!version 3 or (at your option) any later version that should be found at: 
!http://collaboration.cmc.ec.gc.ca/science/rpn.comm/license.html 
!
!This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 
!without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
!See the above mentioned License/Disclaimer for more details.
!You should have received a copy of the License/Disclaimer along with this software; 
!if not, you can write to: EC-RPN COMM Group, 2121 TransCanada, suite 500, Dorval (Quebec), 
!CANADA, H9P 1J3; or send e-mail to service.rpn@ec.gc.ca
!-------------------------------------- LICENCE END --------------------------------------
***s/r v4d_zerohalo - Zero the halo of a variable  
*
#include "model_macros_f.h"
*

      subroutine v4d_zerohalo ( F, in, jn, DIST_DIM, Nk)  49
*
#include "impnone.cdk"
*
      integer DIST_DIM,Nk,in,jn
      real    F(DIST_SHAPE,Nk)
*
*author
*     M.Tanguay
*
*revision
* v3_03 - Tanguay M.        - initial MPI version
*
*object 
*     see id section
*
*arguments
*
*implicits
#include "glb_ld.cdk"
#include "ptopo.cdk"
*
      integer i, j, k
      real*8, parameter :: ZERO_8 = 0.0
*
*PDIR PARDO FOR=Ptopo_npeOpenMP
      do k=1,Nk
         do j=l_miny,0
         do i=l_minx,l_maxx
            F(i,j,k) = ZERO_8 
         end do
         end do
         do j=jn+1,  l_maxy
         do i=l_minx,l_maxx
            F(i,j,k) = ZERO_8 
         end do
         end do
         do i=l_minx,0
         do j=l_miny,l_maxy
            F(i,j,k) = ZERO_8 
         end do
         end do
         do i=in+1,  l_maxx
         do j=l_miny,l_maxy
            F(i,j,k) = ZERO_8 
         end do
         end do
      end do
*
      return
      end