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module psb_s_nullprec
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use psb_prec_type
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type, extends(psb_s_base_prec_type) :: psb_s_null_prec_type
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contains
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procedure, pass(prec) :: apply => s_null_apply
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procedure, pass(prec) :: precbld => s_null_precbld
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procedure, pass(prec) :: precinit => s_null_precinit
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procedure, pass(prec) :: precseti => s_null_precseti
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procedure, pass(prec) :: precsetr => s_null_precsetr
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procedure, pass(prec) :: precsetc => s_null_precsetc
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procedure, pass(prec) :: precfree => s_null_precfree
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procedure, pass(prec) :: precdescr => s_null_precdescr
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procedure, pass(prec) :: sizeof => s_null_sizeof
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end type psb_s_null_prec_type
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contains
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subroutine s_null_apply(alpha,prec,x,beta,y,desc_data,info,trans,work)
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use psb_sparse_mod
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type(psb_desc_type),intent(in) :: desc_data
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class(psb_s_null_prec_type), intent(in) :: prec
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real(psb_spk_),intent(in) :: x(:)
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real(psb_spk_),intent(in) :: alpha, beta
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real(psb_spk_),intent(inout) :: y(:)
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integer, intent(out) :: info
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character(len=1), optional :: trans
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real(psb_spk_),intent(inout), optional, target :: work(:)
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Integer :: err_act, nrow
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character(len=20) :: name='s_null_prec_apply'
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call psb_erractionsave(err_act)
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!
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! This is the base version and we should throw an error.
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! Or should it be the NULL preonditioner???
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!
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info = psb_success_
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nrow = psb_cd_get_local_rows(desc_data)
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if (size(x) < nrow) then
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info = 36
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call psb_errpush(info,name,i_err=(/2,nrow,0,0,0/))
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goto 9999
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end if
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if (size(y) < nrow) then
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info = 36
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call psb_errpush(info,name,i_err=(/3,nrow,0,0,0/))
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goto 9999
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end if
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call psb_geaxpby(alpha,x,beta,y,desc_data,info)
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if (info /= psb_success_ ) then
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info = psb_err_from_subroutine_
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call psb_errpush(infoi,name,a_err="psb_geaxpby")
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goto 9999
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end if
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine s_null_apply
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subroutine s_null_precinit(prec,info)
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use psb_sparse_mod
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Implicit None
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class(psb_s_null_prec_type),intent(inout) :: prec
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integer, intent(out) :: info
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Integer :: err_act, nrow
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character(len=20) :: name='s_null_precinit'
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call psb_erractionsave(err_act)
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info = psb_success_
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine s_null_precinit
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subroutine s_null_precbld(a,desc_a,prec,info,upd)
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use psb_sparse_mod
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Implicit None
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type(psb_s_sparse_mat), intent(in), target :: a
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type(psb_desc_type), intent(in), target :: desc_a
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class(psb_s_null_prec_type),intent(inout) :: prec
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integer, intent(out) :: info
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character, intent(in), optional :: upd
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Integer :: err_act, nrow
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character(len=20) :: name='s_null_precbld'
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call psb_erractionsave(err_act)
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info = psb_success_
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine s_null_precbld
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subroutine s_null_precseti(prec,what,val,info)
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use psb_sparse_mod
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Implicit None
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class(psb_s_null_prec_type),intent(inout) :: prec
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integer, intent(in) :: what
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integer, intent(in) :: val
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integer, intent(out) :: info
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Integer :: err_act, nrow
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character(len=20) :: name='s_null_precset'
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call psb_erractionsave(err_act)
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info = psb_success_
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine s_null_precseti
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subroutine s_null_precsetr(prec,what,val,info)
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use psb_sparse_mod
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Implicit None
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class(psb_s_null_prec_type),intent(inout) :: prec
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integer, intent(in) :: what
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real(psb_spk_), intent(in) :: val
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integer, intent(out) :: info
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Integer :: err_act, nrow
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character(len=20) :: name='s_null_precset'
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call psb_erractionsave(err_act)
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info = psb_success_
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine s_null_precsetr
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subroutine s_null_precsetc(prec,what,val,info)
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use psb_sparse_mod
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Implicit None
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class(psb_s_null_prec_type),intent(inout) :: prec
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integer, intent(in) :: what
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character(len=*), intent(in) :: val
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integer, intent(out) :: info
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Integer :: err_act, nrow
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character(len=20) :: name='s_null_precset'
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call psb_erractionsave(err_act)
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info = psb_success_
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine s_null_precsetc
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subroutine s_null_precfree(prec,info)
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use psb_sparse_mod
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Implicit None
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class(psb_s_null_prec_type), intent(inout) :: prec
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integer, intent(out) :: info
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Integer :: err_act, nrow
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character(len=20) :: name='s_null_precset'
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call psb_erractionsave(err_act)
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info = psb_success_
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine s_null_precfree
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subroutine s_null_precdescr(prec,iout)
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use psb_sparse_mod
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Implicit None
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class(psb_s_null_prec_type), intent(in) :: prec
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integer, intent(in), optional :: iout
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Integer :: err_act, nrow, info
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character(len=20) :: name='s_null_precset'
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integer :: iout_
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call psb_erractionsave(err_act)
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info = psb_success_
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if (present(iout)) then
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iout_ = iout
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else
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iout_ = 6
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end if
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write(iout_,*) 'No preconditioning'
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine s_null_precdescr
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function s_null_sizeof(prec) result(val)
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use psb_sparse_mod
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class(psb_s_null_prec_type), intent(in) :: prec
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integer(psb_long_int_k_) :: val
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val = 0
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return
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end function s_null_sizeof
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end module psb_s_nullprec
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