module psb_z_nullprec
use psb_z_base_prec_mod
type, extends(psb_z_base_prec_type) :: psb_z_null_prec_type
contains
procedure, pass(prec) :: apply => psb_z_null_apply
procedure, pass(prec) :: precbld => psb_z_null_precbld
procedure, pass(prec) :: precinit => psb_z_null_precinit
procedure, pass(prec) :: precseti => psb_z_null_precseti
procedure, pass(prec) :: precsetr => psb_z_null_precsetr
procedure, pass(prec) :: precsetc => psb_z_null_precsetc
procedure, pass(prec) :: precfree => psb_z_null_precfree
procedure, pass(prec) :: precdescr => psb_z_null_precdescr
procedure, pass(prec) :: sizeof => psb_z_null_sizeof
end type psb_z_null_prec_type
private :: psb_z_null_apply, psb_z_null_precbld, psb_z_null_precseti,&
& psb_z_null_precsetr, psb_z_null_precsetc, psb_z_null_sizeof,&
& psb_z_null_precinit, psb_z_null_precfree, psb_z_null_precdescr
contains
subroutine psb_z_null_apply(alpha,prec,x,beta,y,desc_data,info,trans,work)
use psb_sparse_mod
type(psb_desc_type),intent(in) :: desc_data
class(psb_z_null_prec_type), intent(in) :: prec
complex(psb_dpk_),intent(in) :: x(:)
complex(psb_dpk_),intent(in) :: alpha, beta
complex(psb_dpk_),intent(inout) :: y(:)
integer, intent(out) :: info
character(len=1), optional :: trans
complex(psb_dpk_),intent(inout), optional, target :: work(:)
Integer :: err_act, nrow
character(len=20) :: name='z_null_prec_apply'
call psb_erractionsave(err_act)
!
! This is the base version and we should throw an error.
! Or should it be the NULL preonditioner???
!
info = psb_success_
nrow = psb_cd_get_local_rows(desc_data)
if (size(x) < nrow) then
info = 36
call psb_errpush(info,name,i_err=(/2,nrow,0,0,0/))
goto 9999
end if
if (size(y) < nrow) then
info = 36
call psb_errpush(info,name,i_err=(/3,nrow,0,0,0/))
goto 9999
end if
call psb_geaxpby(alpha,x,beta,y,desc_data,info)
if (info /= psb_success_ ) then
info = psb_err_from_subroutine_
call psb_errpush(infoi,name,a_err="psb_geaxpby")
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()
return
end if
return
end subroutine psb_z_null_apply
subroutine psb_z_null_precinit(prec,info)
use psb_sparse_mod
Implicit None
class(psb_z_null_prec_type),intent(inout) :: prec
integer, intent(out) :: info
Integer :: err_act, nrow
character(len=20) :: name='z_null_precinit'
call psb_erractionsave(err_act)
info = psb_success_
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_z_null_precinit
subroutine psb_z_null_precbld(a,desc_a,prec,info,upd,mold,afmt)
use psb_sparse_mod
Implicit None
type(psb_zspmat_type), intent(in), target :: a
type(psb_desc_type), intent(in), target :: desc_a
class(psb_z_null_prec_type),intent(inout) :: prec
integer, intent(out) :: info
character, intent(in), optional :: upd
character(len=*), intent(in), optional :: afmt
class(psb_z_base_sparse_mat), intent(in), optional :: mold
Integer :: err_act, nrow
character(len=20) :: name='z_null_precbld'
call psb_erractionsave(err_act)
info = psb_success_
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_z_null_precbld
subroutine psb_z_null_precseti(prec,what,val,info)
use psb_sparse_mod
Implicit None
class(psb_z_null_prec_type),intent(inout) :: prec
integer, intent(in) :: what
integer, intent(in) :: val
integer, intent(out) :: info
Integer :: err_act, nrow
character(len=20) :: name='z_null_precset'
call psb_erractionsave(err_act)
info = psb_success_
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_z_null_precseti
subroutine psb_z_null_precsetr(prec,what,val,info)
use psb_sparse_mod
Implicit None
class(psb_z_null_prec_type),intent(inout) :: prec
integer, intent(in) :: what
real(psb_dpk_), intent(in) :: val
integer, intent(out) :: info
Integer :: err_act, nrow
character(len=20) :: name='z_null_precset'
call psb_erractionsave(err_act)
info = psb_success_
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_z_null_precsetr
subroutine psb_z_null_precsetc(prec,what,val,info)
use psb_sparse_mod
Implicit None
class(psb_z_null_prec_type),intent(inout) :: prec
integer, intent(in) :: what
character(len=*), intent(in) :: val
integer, intent(out) :: info
Integer :: err_act, nrow
character(len=20) :: name='z_null_precset'
call psb_erractionsave(err_act)
info = psb_success_
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_z_null_precsetc
subroutine psb_z_null_precfree(prec,info)
use psb_sparse_mod
Implicit None
class(psb_z_null_prec_type), intent(inout) :: prec
integer, intent(out) :: info
Integer :: err_act, nrow
character(len=20) :: name='z_null_precset'
call psb_erractionsave(err_act)
info = psb_success_
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_z_null_precfree
subroutine psb_z_null_precdescr(prec,iout)
use psb_sparse_mod
Implicit None
class(psb_z_null_prec_type), intent(in) :: prec
integer, intent(in), optional :: iout
Integer :: err_act, nrow, info
character(len=20) :: name='z_null_precset'
integer :: iout_
call psb_erractionsave(err_act)
info = psb_success_
if (present(iout)) then
iout_ = iout
else
iout_ = 6
end if
write(iout_,*) 'No preconditioning'
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_z_null_precdescr
function psb_z_null_sizeof(prec) result(val)
use psb_sparse_mod
class(psb_z_null_prec_type), intent(in) :: prec
integer(psb_long_int_k_) :: val
val = 0
return
end function psb_z_null_sizeof
end module psb_z_nullprec