subroutine GTVarGetAttrD(var, attrname, value, default)
  use gtdata_types, only: GT_VARIABLE
  use gt_map, only: var_class, vtb_class_netcdf, vtb_class_memory
  use an_generic, only: get_attr, an_variable
  use gt_mem, only: get_attr, mem_variable
  use dc_string, only: VSTRING, assignment(=), stod
  use dc_error, only: GT_ENOTVAR, StoreError
  use dc_types, only: DP
  use netcdf_f77, only: NF_FILL_REAL
  implicit none
  type(GT_VARIABLE), intent(in):: var
  character(len = *), intent(in):: attrname
  real(DP), intent(out):: value
  real(DP), intent(in), optional:: default
  integer:: stat
  real(DP):: buffer(1)
  type(VSTRING):: cbuffer
  integer:: class, cid
  logical:: err
continue
  call var_class(var, class, cid)
  select case(class)
  case (vtb_class_netcdf)
    call get_attr(an_variable(cid), attrname, value=buffer,  stat=stat, default=default)
    value = buffer(1)
    if (stat >= 1) return
  case (vtb_class_memory)
    call get_attr(mem_variable(cid), attrname, cbuffer, err)
    if (.not. err) then
      value = stod(cbuffer)
      return
    endif
  case default
    call StoreError(GT_ENOTVAR, "GTVarGetAttrR")
  end select
  value = NF_FILL_REAL
  if (present(default)) value = default
end subroutine

subroutine GTVarGetAttrDA(var, name, value, default)
  use gtdata_types, only: GT_VARIABLE
  use gtdata_generic, only: friend => get_attr
  use gt_map, only: var_class, vtb_class_netcdf, vtb_class_memory
  use an_generic, only: get_attr, an_variable
  use dc_types, only: DP
  use dc_error, only: GT_ENOTVAR, StoreError
  implicit none
  type(GT_VARIABLE), intent(in):: var
  character(len = *), intent(in):: name
  real(DP), intent(out):: value(:)
  real(DP), intent(in):: default
  real(DP), pointer:: ptr(:)
  integer:: n, stat, class, cid
continue
  call var_class(var, class, cid)
  if (class == vtb_class_netcdf) then
    call get_attr(an_variable(cid), name, value, stat, default)
  else if (class == vtb_class_memory) then
    call friend(var, name, ptr)
    if (.not. associated(ptr)) then
      value(:) = default
    else
      n = min(size(ptr), size(value))
      value(1:n) = ptr(1:n)
      if (n < size(ptr)) value(n+1: ) = default
      deallocate(ptr)
    endif
  else
    call StoreError(GT_ENOTVAR, "GTVarGetAttrRA")
  endif
end subroutine GTVarGetAttrDA

subroutine GTVarGetAttrDP(var, name, value)
  use gtdata_types, only: GT_VARIABLE
  use gt_map, only: var_class, vtb_class_netcdf, vtb_class_memory
  use an_generic, only: get_attr, an_variable
  use gt_mem, only: get_attr, mem_variable
  use dc_types, only: DP
  use dc_error, only: GT_ENOTVAR, StoreError
  use dc_string, only: VSTRING, get_array, assignment(=)
  implicit none
  type(GT_VARIABLE), intent(in):: var
  character(len = *), intent(in):: name
  real(DP), pointer:: value(:) !(out)
  integer:: stat, class, cid
  type(VSTRING):: cbuffer
  logical:: err
continue
  call var_class(var, class, cid)
  if (class == vtb_class_netcdf) then
    allocate(value(1))
    call get_attr(an_variable(cid), name, value(1:0), stat)
    deallocate(value)
    if (stat < 1) return
    allocate(value(stat))
    call get_attr(an_variable(cid), name, value, stat)
    if (stat < 1) deallocate(value)
  else if (class == vtb_class_memory) then
    call get_attr(mem_variable(cid), name, cbuffer, err)
    if (err) then
      nullify(value)
      return
    endif
    call get_array(value, cbuffer)
    cbuffer = ""
  else
    call StoreError(GT_ENOTVAR, "GTVarGetAttrRP")
  endif
end subroutine GTVarGetAttrDP

subroutine GTVarGetAttrI(var, attrname, value, default)
  !
  !== 属性の入力
  !
  ! 変数 *var* に付加されている属性 *name* の値を返します。
  ! *Get_Attr* は複数のサブルーチンの総称名なので、
  ! *value* には様々な型の変数 (ポインタも可能)
  ! を与えることが可能です。
  ! 以下のサブルーチンを参照してください。
  !
  ! 属性の値が正常に取得できず、且つ *default* が与えられて
  ! いた場合、その値が返ります。
  ! *default* が与えられない場合のデフォルトの値はそれぞれ以下の
  ! 通りです。
  !
  ! character :: "" (空文字)
  ! real      :: netcdf_f77#NF_FILL_REAL
  ! real(DP)  :: netcdf_f77#NF_FILL_REAL
  ! integer   :: netcdf_f77#NF_FILL_INT
  !
  ! *value* がポインタの場合は、型に依らず空状態が返ります。
  !
  ! *value* にポインタを与えた場合、属性の値に応じて自動的に
  ! 割り付けが行われます。そのため、必ず空状態にしてから与えてください。
  !
  ! *value* に固定長配列を用意する場合 *default* が必須になりますが、
  ! これは Fortran の言語仕様上ポインタ方式と引用仕様が同じであっては
  ! ならないからです。
  !
  use gtdata_types, only: GT_VARIABLE
  use gt_map, only: var_class, vtb_class_netcdf, vtb_class_memory
  use an_generic, only: get_attr, an_variable
  use gt_mem, only: get_attr, mem_variable
  use netcdf_f77, only: NF_FILL_INT
  use dc_string, only: VSTRING, assignment(=), stoi
  use dc_error, only: GT_ENOTVAR, StoreError
  implicit none
  type(GT_VARIABLE), intent(in):: var
  character(len = *), intent(in):: attrname
  integer, intent(out):: value
  integer, intent(in), optional:: default
  integer:: stat, buffer(1), class, cid
  type(VSTRING):: cbuffer
  logical:: err
continue
  call var_class(var, class, cid)
  if (class == vtb_class_netcdf) then
    call get_attr(an_variable(cid), attrname, buffer, stat, default)
    value = buffer(1)
    if (stat >= 1) return
  else if (class == vtb_class_memory) then
    call get_attr(mem_variable(cid), attrname, cbuffer, err)
    if (.not. err) then
      value = stoi(cbuffer)
      return
    endif
  else
    call StoreError(GT_ENOTVAR, "GTVarGetAttrI")
  endif
  value = NF_FILL_INT
  if (present(default)) value = default
end subroutine GTVarGetAttrI

subroutine GTVarGetAttrIA(var, name, value, stat, default)
  use gtdata_types, only: GT_VARIABLE
  use gtdata_generic, only: friend => get_attr
  use gt_map, only: var_class, vtb_class_netcdf, vtb_class_memory
  use an_generic, only: get_attr, an_variable
  use dc_error, only: GT_ENOTVAR, StoreError
  implicit none
  type(GT_VARIABLE), intent(in):: var
  character(len = *), intent(in):: name
  integer, intent(out):: value(:)
  integer, intent(in):: default
  integer, pointer:: ptr(:)
  integer:: n, stat, class, cid
continue
  call var_class(var, class, cid)
  if (class == vtb_class_netcdf) then
    call get_attr(an_variable(cid), name, value, stat, default)
  else if (class == vtb_class_memory) then
    call friend(var, name, ptr)
    if (.not. associated(ptr)) then
      value(:) = default
    else
      n = min(size(ptr), size(value))
      value(1:n) = ptr(1:n)
      if (n < size(ptr)) value(n+1: ) = default
      deallocate(ptr)
    endif
  else
    call StoreError(GT_ENOTVAR, "GTVarGetAttrIA")
  endif
end subroutine GTVarGetAttrIA

subroutine GTVarGetAttrIP(var, name, value)
  use gtdata_types, only: GT_VARIABLE
  use gt_map, only: var_class, vtb_class_netcdf, vtb_class_memory
  use an_generic, only: get_attr, an_variable
  use gt_mem, only: get_attr, mem_variable
  use dc_error, only: GT_ENOTVAR, StoreError
  use dc_string, only: VSTRING, get_array, assignment(=)
  implicit none
  type(GT_VARIABLE), intent(in):: var
  character(len = *), intent(in):: name
  integer, pointer:: value(:) !(out)
  integer:: stat, class, cid
  type(VSTRING):: cbuffer
  logical:: err
continue
  call var_class(var, class, cid)
  if (class == vtb_class_netcdf) then
    allocate(value(1))
    call get_attr(an_variable(cid), name, value(1:0), stat)
    deallocate(value)
    if (stat < 1) return
    allocate(value(stat))
    call get_attr(an_variable(cid), name, value, stat)
    if (stat < 1) deallocate(value)
  else if (class == vtb_class_memory) then
    call get_attr(mem_variable(cid), name, cbuffer, err)
    if (err) then
      nullify(value)
      return
    endif
    call get_array(value, cbuffer)
    cbuffer = ""
  else
    call StoreError(GT_ENOTVAR, "GTVarGetAttrIP")
  endif
end subroutine GTVarGetAttrIP

subroutine GTVarGetAttrR(var, attrname, value, default)
  use gtdata_types, only: GT_VARIABLE
  use an_generic, only: get_attr, an_variable
  use gt_mem, only: get_attr, mem_variable
  use gt_map, only: var_class, vtb_class_netcdf, vtb_class_memory
  use dc_error, only: GT_EBADVAR, StoreError
  use dc_string, only: VSTRING, assignment(=), stod
  use netcdf_f77, only: NF_FILL_REAL
  implicit none
  type(GT_VARIABLE), intent(in):: var
  character(len = *), intent(in):: attrname
  real, intent(out):: value
  real, intent(in), optional:: default
  integer:: stat
  real:: buffer(1)
  type(VSTRING):: cbuffer
  integer:: class, cid
  logical:: err
continue
  call var_class(var, class, cid)
  if (class == vtb_class_netcdf) then
    call get_attr(an_variable(cid), attrname, value=buffer,  stat=stat, default=default)
    if (stat >= 1) then
      value = buffer(1)
      return
    endif
  else if (class == vtb_class_memory) then
    call get_attr(mem_variable(cid), attrname, cbuffer, err)
    if (.not. err) then
      value = stod(cbuffer)
      return
    endif
  else
    call StoreError(GT_EBADVAR, "GTVarGetAttrR")
  endif
  if (present(default)) then
    value = default
  else
    value = NF_FILL_REAL
  endif
end subroutine GTVarGetAttrR

subroutine GTVarGetAttrRA(var, name, value, default)
  use gtdata_types, only: GT_VARIABLE
  use gtdata_generic, only: friend => get_attr
  use gt_map, only: var_class, vtb_class_netcdf, vtb_class_memory
  use an_generic, only: get_attr, an_variable
  use dc_error, only: GT_ENOTVAR, StoreError
  implicit none
  type(GT_VARIABLE), intent(in):: var
  character(len = *), intent(in):: name
  real, intent(out):: value(:)
  real, intent(in):: default
  real, pointer:: ptr(:)
  integer:: n, class, cid, stat
continue
  call var_class(var, class, cid)
  if (class == vtb_class_netcdf) then
    call get_attr(an_variable(cid), name, value, stat, default)
  else if (class == vtb_class_memory) then
    call friend(var, name, ptr)
    if (.not. associated(ptr)) then
      value(:) = default
    else
      n = min(size(ptr), size(value))
      value(1:n) = ptr(1:n)
      if (n < size(ptr)) value(n+1: ) = default
      deallocate(ptr)
    endif
  else
    call StoreError(GT_ENOTVAR, "GTVarGetAttrRA")
  endif
end subroutine GTVarGetAttrRA

subroutine GTVarGetAttrRP(var, name, value)
  use gtdata_types, only: GT_VARIABLE
  use gt_map, only: var_class, vtb_class_netcdf, vtb_class_memory
  use an_generic, only: get_attr, an_variable
  use gt_mem, only: get_attr, mem_variable
  use dc_string, only: VSTRING, assignment(=), get_array
  use dc_error, only: GT_ENOTVAR, StoreError
  implicit none
  type(GT_VARIABLE), intent(in):: var
  character(len = *), intent(in):: name
  real, pointer:: value(:) !(out)
  integer:: stat, class, cid
  type(VSTRING):: cbuffer
  logical:: err
continue
  call var_class(var, class, cid)
  if (class == vtb_class_netcdf) then
    allocate(value(1))
    call get_attr(an_variable(cid), name, value(1:0), stat)
    deallocate(value)
    if (stat < 1) return
    allocate(value(stat))
    call get_attr(an_variable(cid), name, value, stat)
    if (stat < 1) deallocate(value)
  else if (class == vtb_class_memory) then
    call get_attr(mem_variable(cid), name, cbuffer, err)
    if (err) then
      nullify(value)
      return
    endif
    call get_array(value, cbuffer)
    cbuffer = ""
  else
    nullify(value)
    call StoreError(GT_ENOTVAR, "GTVarGetAttrRP")
  endif
end subroutine GTVarGetAttrRP