pack_and_send_floatR4 Subroutine

subroutine pack_and_send_floatR4(vm, bufsize, recvPets, rootPet, buffer, &
                               outbuffer, dims)

  type(ESMF_VM) :: vm
  integer :: bufsize(:)
  integer :: recvPets
  integer :: rootPet
  real(ESMF_KIND_R4) :: buffer(:)
  real(ESMF_KIND_R4) :: outbuffer(:,:)
  integer :: dims(:)

  integer :: xdim, start
  integer :: lbnd(2), ubnd(2)
  integer :: i,j,k,ii
  real(ESMF_KIND_R4), pointer :: sendbuf(:)
  integer :: localrc

  ! fill my own pointer first
  lbnd = lbound(outbuffer)
  ubnd = ubound(outbuffer)
  xdim = ubnd(1)-lbnd(1)+1
  bufsize(2)=ubnd(2)-lbnd(2)+1
  do i=1,bufsize(2)
    outbuffer(:, lbnd(2)+i-1) = buffer((i-1)*bufsize(1)+1 : (i-1)*bufsize(1)+xdim)
  enddo
  if (recvPets > 1) then
     allocate(sendbuf(dims(1)*bufsize(2)))
     start=xdim
     do k = 1, recvPets-1
       if (k>1) then
        if (dims(k) /= dims(k-1)) then
          deallocate(sendbuf)
          allocate(sendbuf(dims(k)*bufsize(2)))
        endif
       endif
       ii = 1
       do j = 1, bufsize(2)
         do i = start+1, start+dims(k)
            sendbuf(ii) = buffer((j-1)*bufsize(1)+i)
            ii=ii+1
         enddo
       enddo
       call ESMF_VMSend(vm, sendbuf, dims(k)*bufsize(2), rootPet+k, rc=localrc)
       start = start+dims(k)
     enddo
     deallocate(sendbuf)
  endif
end subroutine pack_and_send_floatR4