You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
122 lines
3.9 KiB
Fortran
122 lines
3.9 KiB
Fortran
!!$
|
|
!!$ Parallel Sparse BLAS version 2.2
|
|
!!$ (C) Copyright 2006/2007/2008
|
|
!!$ Salvatore Filippone University of Rome Tor Vergata
|
|
!!$ Alfredo Buttari University of Rome Tor Vergata
|
|
!!$
|
|
!!$ Redistribution and use in source and binary forms, with or without
|
|
!!$ modification, are permitted provided that the following conditions
|
|
!!$ are met:
|
|
!!$ 1. Redistributions of source code must retain the above copyright
|
|
!!$ notice, this list of conditions and the following disclaimer.
|
|
!!$ 2. Redistributions in binary form must reproduce the above copyright
|
|
!!$ notice, this list of conditions, and the following disclaimer in the
|
|
!!$ documentation and/or other materials provided with the distribution.
|
|
!!$ 3. The name of the PSBLAS group or the names of its contributors may
|
|
!!$ not be used to endorse or promote products derived from this
|
|
!!$ software without specific written permission.
|
|
!!$
|
|
!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
|
|
!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
!!$ POSSIBILITY OF SUCH DAMAGE.
|
|
!!$
|
|
!!$
|
|
! File: psb_dneigh.f90
|
|
! Subroutine:
|
|
! Arguments:
|
|
|
|
subroutine psb_dneigh(a,idx,neigh,n,info,lev)
|
|
|
|
use psb_realloc_mod
|
|
use psb_const_mod
|
|
use psb_spmat_type
|
|
use psb_serial_mod, psb_protect_name => psb_dneigh
|
|
implicit none
|
|
|
|
|
|
type(psb_dspmat_type), intent(in) :: a ! the sparse matrix
|
|
integer, intent(in) :: idx ! the index whose neighbours we want to find
|
|
integer, intent(out) :: n, info ! the number of neighbours and the info
|
|
integer, allocatable :: neigh(:) ! the neighbours
|
|
integer, optional :: lev ! level of neighbours to find
|
|
|
|
integer :: lev_, i, nl, ifl,ill,&
|
|
& n1, err_act, nn, nidx,ntl
|
|
character(len=20) :: name
|
|
integer, allocatable :: ia(:), ja(:)
|
|
real(kind(1.d0)), allocatable :: val(:)
|
|
|
|
name='psb_dneigh'
|
|
info = 0
|
|
call psb_erractionsave(err_act)
|
|
|
|
n = 0
|
|
info = 0
|
|
if(present(lev)) then
|
|
lev_=lev
|
|
else
|
|
lev_=1
|
|
end if
|
|
|
|
call psb_sp_getrow(idx,a,n,ia,ja,val,info)
|
|
if (info == 0) call psb_realloc(n,neigh,info)
|
|
if (info /= 0) then
|
|
call psb_errpush(4000,name)
|
|
goto 9999
|
|
end if
|
|
neigh(1:n) = ja(1:n)
|
|
ifl = 1
|
|
ill = n
|
|
|
|
|
|
do nl = 2, lev_
|
|
n1 = ill - ifl + 1
|
|
call psb_ensure_size(ill+n1*n1,neigh,info)
|
|
if (info /= 0) then
|
|
call psb_errpush(4000,name)
|
|
goto 9999
|
|
end if
|
|
ntl = 0
|
|
do i=ifl,ill
|
|
nidx=neigh(i)
|
|
if ((nidx /= idx).and.(nidx > 0).and.(nidx <= a%m)) then
|
|
call psb_sp_getrow(nidx,a,nn,ia,ja,val,info)
|
|
if (info==0) call psb_ensure_size(ill+ntl+nn,neigh,info)
|
|
if (info /= 0) then
|
|
call psb_errpush(4000,name)
|
|
goto 9999
|
|
end if
|
|
neigh(ill+ntl+1:ill+ntl+nn)=ja(1:nn)
|
|
ntl = ntl+nn
|
|
end if
|
|
end do
|
|
call psb_msort_unique(neigh(ill+1:ill+ntl),nn)
|
|
ifl = ill + 1
|
|
ill = ill + nn
|
|
end do
|
|
call imsru(ill,neigh,psb_sort_up_,nn)
|
|
n = nn
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 continue
|
|
call psb_erractionrestore(err_act)
|
|
if (err_act == psb_act_abort_) then
|
|
call psb_error()
|
|
return
|
|
end if
|
|
return
|
|
|
|
|
|
end subroutine psb_dneigh
|
|
|