gdncvarinquireia.f90

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!> @file gdncvarinquireia.f90
!>
!> @author GFD Dennou Club
!> @copyright Copyright (C) GFD Dennou Club, 2000-2026. All rights reserved. <br/>
!>            License is BSD-2-Clause. See [COPYRIGHT](@ref COPYRIGHT) in detail
!>
!> @en
!> @brief Inquire dimension lengths of a netCDF variable (array version)
!> @enden
!>
!> @ja
!> @brief netCDF 変数の次元長を問い合わせる (配列版)
!> @endja
!>
 
!>
!> @en
!> @brief Get dimension lengths for a variable
!>
!> Returns the length of each dimension for the specified variable.
!> The dimlen array must have at least ndims elements.
!> @enden
!>
!> @ja
!> @brief 変数の次元長を取得
!>
!> 指定された変数の各次元の長さを返します。
!> dimlen 配列は少なくとも ndims 個の要素を持つ必要があります。
!> @endja
!>
!> @param[in]  var    @en Variable handle @enden @ja 変数ハンドル @endja
!> @param[out] dimlen @en Array to store dimension lengths @enden @ja 次元長を格納する配列 @endja
!>
subroutine gdncvarinquireia(var, dimlen)
  use gtdata_netcdf_types, only: gd_nc_variable, gd_nc_variable_entry
  !    use gtdata_netcdf_internal, only: GD_NC_VARIABLE_ENTRY
  use gtdata_netcdf_internal, only: vtable_lookup
  use netcdf, only: nf90_noerr, nf90_inquire_dimension
  type(gd_nc_variable), intent(in):: var
  integer, intent(out):: dimlen(:)
  type(gd_nc_variable_entry):: ent
  integer:: stat, i
 
  dimlen(:) = -1
 
  stat = vtable_lookup(var, ent)
  if (stat /= nf90_noerr) return
 
  if (ent%varid > 0) then
    if (.not. associated(ent%dimids)) return
    do, i = 1, min(size(dimlen), size(ent%dimids))
      stat = nf90_inquire_dimension(ent%fileid, ent%dimids(i), len = dimlen(i))
      if (stat /= nf90_noerr ) exit
    enddo
  else
    stat = nf90_inquire_dimension(ent%fileid, ent%dimid, len = dimlen(1))
    if (stat /= nf90_noerr ) dimlen(1) = -1
  endif
end subroutine