gdncattrinquire.f90

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! -*- mode: f90; coding: utf-8 -*-
! Copyright (C) GFD Dennou Club, 2000.  All rights reserved.

subroutine gdncattrinquire(var, attrname, xtype)
  use gtdata_netcdf_types, only: gd_nc_variable, gd_nc_variable_entry
  use gtdata_netcdf_internal, only: vtable_lookup
  use gtdata_netcdf_generic, only: gdncxtypename, inquireplus
  use netcdf, only: nf90_max_name, nf90_noerr, nf90_inquire_attribute
  use dc_url, only: gt_plus
  implicit none
  type(gd_nc_variable), intent(in):: var
  character(len=*), intent(in):: attrname
  character(len=*), intent(out), optional:: xtype
  type(gd_nc_variable_entry):: ent
  integer:: varid, i_xtype, stat
  character(len=NF90_MAX_NAME):: anam
  stat = vtable_lookup(var, ent)
  if (stat /= nf90_noerr) return
  if (present(xtype)) then
    call inquireplus(var, attrname, varid, anam)
    stat = nf90_inquire_attribute(ent%fileid, varid, anam, xtype=i_xtype)
    if (stat /= nf90_noerr) i_xtype = 0
    call gdncxtypename(i_xtype, xtype)
  endif
end subroutine

subroutine gdncattrinquireplus(var, attrname, varid, nf_attrname)
  !
  ! 実際にアクセスするときに使う varid, attrname を得る.
  ! attrname の先頭が '+' ---> 大域属性を強制指示.
  ! attrname の先頭が '-' ---> 変数属性、大域属性の順で検索.
  !
  use gtdata_netcdf_types, only: gd_nc_variable, gd_nc_variable_entry
  use gtdata_netcdf_internal, only: vtable_lookup
  use dc_url, only: gt_plus
  use netcdf, only: nf90_global, nf90_noerr, nf90_inquire_attribute
  type(gd_nc_variable), intent(in):: var
  character(len=*), intent(in):: attrname
  integer, intent(out):: varid
  type(gd_nc_variable_entry):: ent
  character(len=*), intent(out):: nf_attrname
  integer:: stat, n
  stat = vtable_lookup(var, ent)
  if (stat /= nf90_noerr) return
  if (attrname(1:1) == gt_plus) then
    varid = nf90_global
    nf_attrname = attrname(2: )
  else if (attrname(1:1) == '-') then
    varid = ent%varid
    nf_attrname = attrname(2: )
    stat = nf90_inquire_attribute(ent%fileid, varid, nf_attrname, len = n)
    if (stat == nf90_noerr) return
    varid = nf90_global
  else
    varid = ent%varid
    nf_attrname = attrname
  endif
end subroutine gdncattrinquireplus