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psblas3/base/serial/psb_dspgtblk.f90

129 lines
4.3 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS v2.0
!!$ (C) Copyright 2006 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_dspgtblk.f90
! Subroutine: psb_dspgtblk
! Gets one or more rows from a sparse matrix.
! Arguments:
!*****************************************************************************
!* *
!* Takes a specified row from matrix A and copies into matrix B (possibly *
!* appending to B). Output is always COO. Input might be anything, *
!* *
!*****************************************************************************
subroutine psb_dspgtblk(irw,a,b,info,append,iren,lrw,srt)
! Output is always in COO format into B, irrespective of
! the input format
use psb_spmat_type
use psb_const_mod
use psb_string_mod
use psb_serial_mod, psb_protect_name => psb_dspgtblk
implicit none
type(psb_dspmat_type), intent(in) :: a
integer, intent(in) :: irw
type(psb_dspmat_type), intent(inout) :: b
integer,intent(out) :: info
logical, intent(in), optional :: append
integer, intent(in), target, optional :: iren(:)
integer, intent(in), optional :: lrw
logical, intent(in), optional :: srt
logical :: append_,srt_
integer :: i,j,k,ip,jp,nr,idx, nz,iret,nzb, nza, lrw_, irw_, err_act
character(len=20) :: name, ch_err
name='psb_spgtblk'
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 (present(srt)) then
srt_ = srt
else
srt_ = .true.
endif
if (append_) then
nzb = b%infoa(psb_nnz_)
else
nzb = 0
b%m = 0
b%k = 0
b%descra = a%descra
endif
b%fida = 'COO'
call psb_sp_getrow(irw,a,nz,b%ia1,b%ia2,b%aspk,info,iren=iren,&
& lrw=lrw_,append=append_,nzin=nzb)
if (.not.allocated(b%pl)) then
allocate(b%pl(1),stat=info)
b%pl = 0
endif
if (.not.allocated(b%pr)) then
allocate(b%pr(1),stat=info)
b%pr = 0
endif
b%infoa(psb_nnz_) = nzb+nz
b%m = b%m+lrw_-irw+1
b%k = max(b%k,a%k)
if (srt_) call psb_fixcoo(b,info)
!!$ call psb_erractionrestore(err_act)
return
9999 continue
!!$ call psb_erractionrestore(err_act)
call psb_erractionsave(err_act)
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine psb_dspgtblk