!   
!                Parallel Sparse BLAS  version 3.5
!      (C) Copyright 2006-2018
!        Salvatore Filippone    
!        Alfredo Buttari      
!   
!    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.
!   
!    
!
!
! package: psb_linmap_type_mod
!    Defines data types for mapping between vectors belonging
!    to different spaces.
!
module psb_base_linmap_mod
  use psb_const_mod
  use psb_desc_mod, only: psb_desc_type
  

  type psb_base_linmap_type
    integer(psb_ipk_) :: kind
    integer(psb_ipk_), allocatable  :: iaggr(:), naggr(:)
    type(psb_desc_type), pointer :: p_desc_X=>null(), p_desc_Y=>null()
    type(psb_desc_type)   :: desc_X, desc_Y
  contains
    procedure, pass(map)  :: sizeof   => base_map_sizeof
    procedure, pass(map)  :: is_ok    => base_is_ok
    procedure, pass(map)  :: is_asb   => base_is_asb
    procedure, pass(map)  :: get_kind => base_get_kind
    procedure, pass(map)  :: set_kind => base_set_kind
    procedure, pass(map)  :: free     => base_free
    procedure, pass(map)  :: clone    => base_clone
  end type psb_base_linmap_type


  interface psb_move_alloc
    module procedure  psb_base_linmap_transfer
  end interface

  private :: base_map_sizeof, base_is_ok, base_is_asb,&
       & base_get_kind, base_set_kind, base_free, base_clone

contains

  function base_get_kind(map) result(val)
    implicit none
    class(psb_base_linmap_type), intent(in) :: map
    integer(psb_ipk_) :: val
  
    val = map%kind
  end function base_get_kind


  subroutine base_set_kind(map_kind,map)    
    implicit none
    integer(psb_ipk_), intent(in)          :: map_kind
    class(psb_base_linmap_type), intent(inout) :: map

    map%kind = map_kind

  end subroutine base_set_kind


  function base_is_ok(map) result(res)
    use psb_desc_mod
    implicit none 
    class(psb_base_linmap_type), intent(in) :: map
    logical  :: res
    res = .false.

    select case(map%get_kind())
    case (psb_map_aggr_)
      if (.not.associated(map%p_desc_X)) return
      if (.not.associated(map%p_desc_Y)) return
      res = map%p_desc_X%is_ok().and.map%p_desc_Y%is_ok()    
    case(psb_map_gen_linear_)    
      res = map%desc_X%is_ok().and.map%desc_Y%is_ok()    
    end select

  end function base_is_ok

  function base_is_asb(map) result(res)
    use psb_desc_mod
    implicit none 
    class(psb_base_linmap_type), intent(in) :: map
    logical  :: res
    res = .false.

    select case(map%get_kind())
    case (psb_map_aggr_)
      if (.not.associated(map%p_desc_X)) return
      if (.not.associated(map%p_desc_Y)) return
      res = map%p_desc_X%is_asb().and.map%p_desc_Y%is_asb()    
    case(psb_map_gen_linear_)    
      res = map%desc_X%is_asb().and.map%desc_Y%is_asb()    
    end select

  end function base_is_asb

  function base_map_sizeof(map) result(val)
    use psb_desc_mod
    implicit none 
    class(psb_base_linmap_type), intent(in) :: map
    integer(psb_long_int_k_) :: val

    val = psb_sizeof_int
    if (allocated(map%iaggr))   &
         & val = val + psb_sizeof_int*size(map%iaggr)
    if (allocated(map%naggr))   &
         & val = val + psb_sizeof_int*size(map%naggr)
    val = val + map%desc_X%sizeof()
    val = val + map%desc_Y%sizeof()

  end function base_map_sizeof
  
  subroutine  psb_base_linmap_transfer(mapin,mapout,info)
    use psb_realloc_mod
    use psb_desc_mod
    use psb_mat_mod, only : psb_move_alloc
    implicit none 
    type(psb_base_linmap_type), intent(inout) :: mapin,mapout
    integer(psb_ipk_), intent(out)            :: info 
    
    mapout%kind = mapin%kind
    call psb_move_alloc(mapin%iaggr,mapout%iaggr,info)
    call psb_move_alloc(mapin%naggr,mapout%naggr,info)
    mapout%p_desc_X => mapin%p_desc_X 
    mapin%p_desc_X  => null()
    mapout%p_desc_Y => mapin%p_desc_Y
    mapin%p_desc_Y  => null()
    call psb_move_alloc(mapin%desc_X,mapout%desc_X,info)
    call psb_move_alloc(mapin%desc_Y,mapout%desc_Y,info)

  end subroutine psb_base_linmap_transfer



  subroutine  base_clone(map,mapout,info)
    use psb_desc_mod
    use psb_realloc_mod
    implicit none 
    class(psb_base_linmap_type), intent(inout) :: map
    class(psb_base_linmap_type), intent(inout) :: mapout
    integer(psb_ipk_)     :: info 
    
    mapout%kind = map%kind
    call psb_safe_ab_cpy(map%iaggr,mapout%iaggr,info)
    call psb_safe_ab_cpy(map%naggr,mapout%naggr,info)
    mapout%p_desc_X => map%p_desc_X 
    mapout%p_desc_Y => map%p_desc_Y
    call map%desc_X%clone(mapout%desc_X,info)
    call map%desc_Y%clone(mapout%desc_Y,info)

  end subroutine base_clone


  subroutine  base_free(map,info)
    implicit none 
    class(psb_base_linmap_type) :: map
    integer(psb_ipk_), intent(out)       :: info 
    
    if (allocated(map%iaggr)) &
         & deallocate(map%iaggr,stat=info)
    if (allocated(map%naggr)) &
         & deallocate(map%naggr,stat=info)
    map%p_desc_X  => null()
    map%p_desc_Y  => null()
    if (map%desc_X%is_ok()) call map%desc_X%free(info)
    if (map%desc_Y%is_ok()) call map%desc_Y%free(info)

  end subroutine base_free
  


end module psb_base_linmap_mod

