psblas3/base/tools/psb_dspins.f90

!!$ 
!!$              Parallel Sparse BLAS  v2.0
!!$    (C) Copyright 2006 Salvatore Filippone    University of Rome Tor Vergata
!!$                       Alfredo Buttari        University of Rome Tor Vergata
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! File: psb_dspins.f90
!
! Subroutine: psb_dspins
!    Takes a cloud of points and inserts them into a sparse matrix.
! 
! Parameters: 
!    nz       - integer.                          The number of points to insert.
!    ia       - integer,dimension(:).             The row indices of the points.
!    ja       - integer,dimension(:).             The column indices of the points.
!    val      - real,dimension(:).                The values of the points to be inserted.
!    a        - type(<psb_dspmat_type>).          The sparse destination matrix.      
!    desc_a   - type(<psb_desc_type>).            The communication descriptor.
!    info     - integer.                          Error code
!    rebuild  - logical                           Allows to reopen a matrix under
!                                                 certain circumstances.
!
subroutine psb_dspins(nz,ia,ja,val,a,desc_a,info,rebuild)

  use psb_descriptor_type
  use psb_spmat_type
  use psb_serial_mod
  use psb_const_mod
  use psb_error_mod
  use psb_penv_mod
  implicit none

  !....parameters...
  type(psb_desc_type), intent(inout)   :: desc_a
  type(psb_dspmat_type), intent(inout) :: a
  integer, intent(in)                  :: nz,ia(:),ja(:)
  real(kind(1.d0)), intent(in)         :: val(:)
  integer, intent(out)                 :: info
  logical, intent(in), optional        :: rebuild
  !locals.....

  integer :: nrow, err_act,mglob,ncol, spstate
  integer                :: ictxt,np,me
  logical, parameter     :: debug=.false.
  integer, parameter     :: relocsz=200
  logical                :: rebuild_
  integer, allocatable   :: ila(:),jla(:)

  interface psb_cdins
    subroutine psb_cdins(nz,ia,ja,desc_a,info,ila,jla)
      use psb_descriptor_type
      implicit none
      type(psb_desc_type), intent(inout) ::  desc_a
      integer, intent(in)                ::  nz,ia(:),ja(:)
      integer, intent(out)               :: info
      integer, optional, intent(out)     :: ila(:), jla(:)
    end subroutine psb_cdins
  end interface

  interface psb_glob_to_loc
    subroutine psb_glob_to_loc(x,desc_a,info,iact)
      use psb_descriptor_type
      implicit none
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(inout)           :: x(:)  
      integer, intent(out)             :: info
      character, intent(in), optional  :: iact
    end subroutine psb_glob_to_loc
  end interface
  character(len=20)  :: name, ch_err

  info = 0
  name = 'psb_dspins'
  call psb_erractionsave(err_act)


  ictxt = psb_cd_get_context(desc_a)
  mglob = psb_cd_get_global_rows(desc_a)

  call psb_info(ictxt, me, np)

  if (.not.psb_is_ok_desc(desc_a)) then 
    info = 3110
    call psb_errpush(info,name)
    goto 9999
  endif

  if (nz < 0) then 
    info = 1111
    call psb_errpush(info,name)
    goto 9999
  end if
  if (size(ia) < nz) then 
    info = 1111
    call psb_errpush(info,name)
    goto 9999
  end if

  if (size(ja) < nz) then 
    info = 1111
    call psb_errpush(info,name)
    goto 9999
  end if
  if (size(val) < nz) then 
    info = 1111
    call psb_errpush(info,name)
    goto 9999
  end if
  if (nz==0) return

  if (present(rebuild)) then 
    rebuild_ = rebuild
  else
    rebuild_ = .false.
  endif

  spstate = a%infoa(psb_state_)
  if (psb_is_bld_desc(desc_a)) then 
    if (psb_is_large_desc(desc_a)) then 

      allocate(ila(nz),jla(nz),stat=info)
      if (info /= 0) then
        ch_err='allocate'
        call psb_errpush(4013,name,a_err=ch_err,i_err=(/info,0,0,0,0/))
        goto 9999
      end if
      call  psb_cdins(nz,ia,ja,desc_a,info,ila=ila,jla=jla)
      if (info /= 0) then
        ch_err='psb_cdins'
        call psb_errpush(4013,name,a_err=ch_err,i_err=(/info,0,0,0,0/))
        goto 9999
      end if
      nrow = psb_cd_get_local_rows(desc_a)
      ncol = psb_cd_get_local_cols(desc_a)

      if (spstate == psb_spmat_bld_) then 
        call psb_coins(nz,ila,jla,val,a,1,nrow,1,ncol,info)
        if (info /= 0) then
          info=4010
          ch_err='psb_coins'
          call psb_errpush(info,name,a_err=ch_err)
          goto 9999
        end if
      else
        info = 1123
        call psb_errpush(info,name)
        goto 9999
      end if

    else

      call  psb_cdins(nz,ia,ja,desc_a,info)
      if (info /= 0) then
        ch_err='psb_cdins'
        call psb_errpush(4013,name,a_err=ch_err,i_err=(/info,0,0,0,0/))
        goto 9999
      end if
      nrow = psb_cd_get_local_rows(desc_a)
      ncol = psb_cd_get_local_cols(desc_a)

      if (spstate == psb_spmat_bld_) then 
        call psb_coins(nz,ia,ja,val,a,1,nrow,1,ncol,info,gtl=desc_a%glob_to_loc)
        if (info /= 0) then
          info=4010
          ch_err='psb_coins'
          call psb_errpush(info,name,a_err=ch_err)
          goto 9999
        end if
      else
        info = 1123
        call psb_errpush(info,name)
        goto 9999
      end if

    end if
    nrow = psb_cd_get_local_rows(desc_a)
    ncol = psb_cd_get_local_cols(desc_a)

  else if (psb_is_asb_desc(desc_a)) then 

    if (psb_is_large_desc(desc_a)) then 

      allocate(ila(nz),jla(nz),stat=info)
      if (info /= 0) then
        ch_err='allocate'
        call psb_errpush(4013,name,a_err=ch_err,i_err=(/info,0,0,0,0/))
        goto 9999
      end if

      ila(1:nz) = ia(1:nz)
      jla(1:nz) = ja(1:nz)
      call psb_glob_to_loc(ila(1:nz),desc_a,info,iact='I')
      call psb_glob_to_loc(jla(1:nz),desc_a,info,iact='I')
      nrow = psb_cd_get_local_rows(desc_a)
      ncol = psb_cd_get_local_cols(desc_a)

      call psb_coins(nz,ia,ja,val,a,1,nrow,1,ncol,&
           & info,rebuild=rebuild_)
      if (info /= 0) then
        info=4010
        ch_err='psb_coins'
        call psb_errpush(info,name,a_err=ch_err)
        goto 9999
      end if

    else
      nrow = psb_cd_get_local_rows(desc_a)
      ncol = psb_cd_get_local_cols(desc_a)
      call psb_coins(nz,ia,ja,val,a,1,nrow,1,ncol,&
           & info,gtl=desc_a%glob_to_loc,rebuild=rebuild_)
      if (info /= 0) then
        info=4010
        ch_err='psb_coins'
        call psb_errpush(info,name,a_err=ch_err)
        goto 9999
      end if
    end if
  else
    info = 1122
    call psb_errpush(info,name)
    goto 9999
  end if

  call psb_erractionrestore(err_act)
  return

9999 continue
  call psb_erractionrestore(err_act)
  if (err_act == psb_act_abort_) then
    call psb_error(ictxt)
    return
  end if
  return

end subroutine psb_dspins