psblas3/base/serial/psb_dspgetrow.f90

!!$ 
!!$              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
!!$ 
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! File:  psb_dspgetrow.f90 
! Subroutine: psb_dspgetrow
!    Gets one or more rows from a sparse matrix. 
! Arguments:
!  irw     - integer, input               The row to be extracted
!  a       - type(psb_dspmat_type),input  The sparse matrix
!  nz      - integer, output              The number of entries
!  ia(:)   - integer, allocatable, inout  The output row indices
!  ja(:)   - integer, allocatable, inout  The output col indices
!  val(:)  - real, allocatable,inout      The coefficients
!  info    - integer, output              Error code
!  iren(:) - integer, input,optional      Renumbering of indices
!  lrw     - integer, input,optional      Extract rows irw:lrw, default lrw=irw
!  append  - logical, input,optional      Should we append to already existing
!                                         partial output?
!  nzin    - integer, input, optional     If appending, how many entries were already
!                                         occupied.
!
subroutine psb_dspgetrow(irw,a,nz,ia,ja,val,info,iren,lrw,append,nzin)
  ! Output is always in  COO format 
  use psb_spmat_type
  use psb_const_mod
  use psb_getrow_mod
  use psb_string_mod
  use psb_serial_mod, psb_protect_name => psb_dspgetrow
  implicit none

  type(psb_dspmat_type), intent(in)    :: a
  integer, intent(in)                  :: irw
  integer, intent(out)                 :: nz
  integer, allocatable, intent(inout)  :: ia(:), ja(:)
  real(psb_dpk_), allocatable,  intent(inout)    :: val(:)
  integer,intent(out)                  :: info
  logical, intent(in), optional        :: append
  integer, intent(in), optional        :: iren(:)
  integer, intent(in), optional        :: lrw, nzin

  logical :: append_ 
  integer :: nzin_, lrw_, irw_, err_act
  character(len=20)                 :: name, ch_err

  name='psb_spgetrow'
  info  = 0

  call psb_erractionsave(err_act)

  irw_ = irw 
  if (present(lrw)) then
    lrw_ = lrw
  else
    lrw_ = irw
  endif
  if (lrw_ < irw) then
    write(0,*) 'SPGTBLK input error: fixing lrw',irw,lrw_
    lrw_ = irw
  end if
  if (present(append)) then
    append_=append
  else
    append_=.false.
  endif


  if ((append_).and.(present(nzin))) then 
    nzin_ = nzin
  else
    nzin_ = 0
  endif

  select case (tolower(a%fida))
  case ('csr')
    call csr_getrow(irw_,a,nz,ia,ja,val,nzin_,append_,lrw_,info,iren)
  case ('coo')
    call coo_getrow(irw_,a,nz,ia,ja,val,nzin_,append_,lrw_,info,iren)
  case ('jad')
    call jad_getrow(irw_,a,nz,ia,ja,val,nzin_,append_,lrw_,info,iren)
  case default
    info=136
    ch_err=a%fida(1:3)
    call psb_errpush(info,name,a_err=ch_err)
    goto 9999
  end select
  
  if (info /= 0) goto 9999
!!$  call psb_erractionrestore(err_act)
  return
  
9999 continue
!!$  call psb_erractionrestore(err_act)
  call psb_erractionsave(err_act)
  if (err_act == psb_act_abort_) then
     call psb_error()
     return
  end if
  return
  

end subroutine psb_dspgetrow