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! This is part of the netCDF package.
! Copyright 2006 University Corporation for Atmospheric Research/Unidata.
! See COPYRIGHT file for conditions of use.
! This program tests netCDF-4 variable functions from fortran.
! Ed Hartnett
program f90tst_grps
use typeSizes
use netcdf
implicit none
! This is the name of the data file we will create.
character (len = *), parameter :: FILE_NAME = "f90tst_grps.nc"
! We are writing 2D data, a 6 x 12 grid.
integer, parameter :: MAX_DIMS = 2
integer, parameter :: NX = 6, NY = 12
! We need these ids and other gunk for netcdf.
integer :: ncid, varid1, varid2, varid3, varid4, dimids(MAX_DIMS)
integer :: chunksizes(MAX_DIMS), chunksizes_in(MAX_DIMS)
integer :: x_dimid, y_dimid
integer :: nvars, ngatts, ndims, unlimdimid, file_format
integer, parameter :: CACHE_NELEMS = 10000, CACHE_SIZE = 1000000
integer, parameter :: DEFLATE_LEVEL = 4
integer (kind = EightByteInt), parameter :: TOE_SAN_VALUE = 2147483648_EightByteInt
character (len = *), parameter :: VAR1_NAME = "Payroll"
character (len = *), parameter :: VAR2_NAME = "Spies"
character (len = *), parameter :: VAR3_NAME = "Propaganda"
character (len = *), parameter :: VAR4_NAME = "Arms"
character (len = *), parameter :: GRP1_NAME = "Irish_Republican_Brotherhood"
character (len = *), parameter :: GRP2_NAME = "Sinn_Fein"
character (len = *), parameter :: GRP3_NAME = "Gaelic_Athletic_Association"
character (len = *), parameter :: GRP4_NAME = "Provisional_Government"
character (len = NF90_MAX_NAME) :: grp1_full_name
integer :: len
! Information read back from the file to check correctness.
integer :: varid1_in, varid2_in, varid3_in, varid4_in
integer :: grpid1, grpid2, grpid3, grpid4
integer :: xtype_in, ndims_in, natts_in, dimids_in(MAX_DIMS)
character (len = nf90_max_name) :: name_in
integer :: endianness_in, deflate_level_in
logical :: shuffle_in, fletcher32_in, contiguous_in
print *, ''
print *,'*** Testing netCDF-4 groups from Fortran 90.'
! Create the netCDF file.
call check(nf90_create(FILE_NAME, nf90_netcdf4, ncid))
! Define the dimensions.
call check(nf90_def_dim(ncid, "x", NX, x_dimid))
call check(nf90_def_dim(ncid, "y", NY, y_dimid))
dimids = (/ y_dimid, x_dimid /)
! Define some nested groups.
call check(nf90_def_grp(ncid, GRP1_NAME, grpid1))
call check(nf90_def_grp(grpid1, GRP2_NAME, grpid2))
call check(nf90_def_grp(grpid2, GRP3_NAME, grpid3))
call check(nf90_def_grp(grpid3, GRP4_NAME, grpid4))
! Define some variables.
chunksizes = (/ NY, NX /)
call check(nf90_def_var(ncid, VAR1_NAME, NF90_INT, dimids, varid1, chunksizes = chunksizes, &
shuffle = .TRUE., fletcher32 = .TRUE., endianness = nf90_endian_big, deflate_level = DEFLATE_LEVEL))
call check(nf90_def_var(grpid1, VAR2_NAME, NF90_INT, dimids, varid2, contiguous = .TRUE.))
call check(nf90_def_var(grpid2, VAR3_NAME, NF90_INT64, varid3))
call check(nf90_def_var(grpid3, VAR4_NAME, NF90_INT, x_dimid, varid4, contiguous = .TRUE.))
! Close the file.
call check(nf90_close(ncid))
! Reopen the file.
call check(nf90_open(FILE_NAME, nf90_nowrite, ncid))
! Check some stuff out.
call check(nf90_inquire(ncid, ndims, nvars, ngatts, unlimdimid, file_format))
if (ndims /= 2 .or. nvars /= 1 .or. ngatts /= 0 .or. unlimdimid /= -1 .or. &
file_format /= nf90_format_netcdf4) stop 21
! Get the group ids for the newly reopened file.
call check(nf90_inq_grp_ncid(ncid, GRP1_NAME, grpid1))
call check(nf90_inq_grp_ncid(grpid1, GRP2_NAME, grpid2))
call check(nf90_inq_grp_ncid(grpid2, GRP3_NAME, grpid3))
call check(nf90_inq_grp_ncid(grpid3, GRP4_NAME, grpid4))
! Check for the groups with full group names.
write(grp1_full_name, '(A,A)') '/', GRP1_NAME
call check(nf90_inq_grp_full_ncid(ncid, grp1_full_name, grpid1))
call check(nf90_inq_grpname(grpid1, name_in))
if (name_in .ne. GRP1_NAME) stop 61
call check(nf90_inq_grpname_full(grpid1, len, name_in))
if (name_in .ne. grp1_full_name) stop 62
! Get varids.
call check(nf90_inq_varid(ncid, VAR1_NAME, varid1_in))
call check(nf90_inq_varid(grpid1, VAR2_NAME, varid2_in))
call check(nf90_inq_varid(grpid2, VAR3_NAME, varid3_in))
call check(nf90_inq_varid(grpid3, VAR4_NAME, varid4_in))
! Check variable 1.
call check(nf90_inquire_variable(ncid, varid1_in, name_in, xtype_in, ndims_in, dimids_in, &
natts_in, chunksizes = chunksizes_in, endianness = endianness_in, fletcher32 = fletcher32_in, &
deflate_level = deflate_level_in, shuffle = shuffle_in))
if (name_in .ne. VAR1_NAME .or. xtype_in .ne. NF90_INT .or. ndims_in .ne. MAX_DIMS .or. &
natts_in .ne. 0 .or. dimids_in(1) .ne. dimids(1) .or. dimids_in(2) .ne. dimids(2)) stop 3
if (chunksizes_in(1) /= chunksizes(1) .or. chunksizes_in(2) /= chunksizes(2)) &
stop 4
if (endianness_in .ne. nf90_endian_big) stop 5
! Check variable 2.
call check(nf90_inquire_variable(grpid1, varid2_in, name_in, xtype_in, ndims_in, dimids_in, &
natts_in, contiguous = contiguous_in, endianness = endianness_in, fletcher32 = fletcher32_in, &
deflate_level = deflate_level_in, shuffle = shuffle_in))
if (name_in .ne. VAR2_NAME .or. xtype_in .ne. NF90_INT .or. ndims_in .ne. MAX_DIMS .or. &
natts_in .ne. 0 .or. dimids_in(1) .ne. dimids(1) .or. dimids_in(2) .ne. dimids(2)) stop 6
if (deflate_level_in .ne. 0 .or. .not. contiguous_in .or. fletcher32_in .or. shuffle_in) stop 7
! Check variable 3.
call check(nf90_inquire_variable(grpid2, varid3_in, name_in, xtype_in, ndims_in, dimids_in, &
natts_in, contiguous = contiguous_in, endianness = endianness_in, fletcher32 = fletcher32_in, &
deflate_level = deflate_level_in, shuffle = shuffle_in))
if (name_in .ne. VAR3_NAME .or. xtype_in .ne. NF90_INT64 .or. ndims_in .ne. 0 .or. &
natts_in .ne. 0) stop 8
if (deflate_level_in .ne. 0 .or. .not. contiguous_in .or. fletcher32_in .or. shuffle_in) stop 9
! Check variable 4.
call check(nf90_inquire_variable(grpid3, varid4_in, name_in, xtype_in, ndims_in, dimids_in, &
natts_in, contiguous = contiguous_in, endianness = endianness_in, fletcher32 = fletcher32_in, &
deflate_level = deflate_level_in, shuffle = shuffle_in))
if (name_in .ne. VAR4_NAME .or. xtype_in .ne. NF90_INT .or. ndims_in .ne. 1 .or. &
natts_in .ne. 0 .or. dimids_in(1) .ne. x_dimid) stop 10
if (deflate_level_in .ne. 0 .or. .not. contiguous_in .or. fletcher32_in .or. shuffle_in) stop 11
! Close the file.
call check(nf90_close(ncid))
print *,'*** SUCCESS!'
contains
! This subroutine handles errors by printing an error message and
! exiting with a non-zero status.
subroutine check(errcode)
use netcdf
implicit none
integer, intent(in) :: errcode
if(errcode /= nf90_noerr) then
print *, 'Error: ', trim(nf90_strerror(errcode))
stop 2
endif
end subroutine check
end program f90tst_grps
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