/* This is part of the netCDF package. Copyright 2020 University
   Corporation for Atmospheric Research/Unidata See COPYRIGHT file for
   conditions of use.

   Test HDF5 file code. These are not intended to be exhaustive tests,
   but they use HDF5 the same way that netCDF-4 does, so if these
   tests don't work, than netCDF-4 won't work either.

   This files tests dataset creation and writing.

   Ed Hartnett
*/

#include "h5_err_macros.h"
#include <hdf5.h>

#define FILE_NAME "tst_h_vars.h5"
#define TEST_NAME "tst_h_vars"
#define GRP_NAME "Henry_V"
#define VAR_BOOL_NAME "Southhamptons_Battle_Record"
#define GRP2_NAME "Some_3D_Met_Data"
#define DIM1_LEN 3
#define MAX_DIMS 255
#define NDIM1 1

int
main()
{
    hid_t fileid, grpid, spaceid, datasetid;
    int bool_out[DIM1_LEN] = {0, 1, 0};
    hsize_t dims[1];

    printf("\n*** Checking HDF5 variable functions.\n");
    printf("*** Checking HDF5 boolean variables...");

    /* Open file and create group. */
    if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT,
                            H5P_DEFAULT)) < 0) ERR;
    if ((grpid = H5Gcreate1(fileid, GRP_NAME, 0)) < 0) ERR;

    /* Write an array of bools. */
    dims[0] = DIM1_LEN;
    if ((spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;
    if ((datasetid = H5Dcreate1(grpid, VAR_BOOL_NAME, H5T_NATIVE_HBOOL,
                               spaceid, H5P_DEFAULT)) < 0) ERR;
    if (H5Dwrite(datasetid, H5T_NATIVE_HBOOL, H5S_ALL, H5S_ALL, H5P_DEFAULT,
                 bool_out) < 0) ERR;
    if (H5Dclose(datasetid) < 0 ||
        H5Sclose(spaceid) < 0 ||
        H5Gclose(grpid) < 0 ||
        H5Fclose(fileid) < 0)
        ERR;

    SUMMARIZE_ERR;

    printf("*** Checking HDF5 variable with unlimited dimension...");
    {
#define LAT_LEN 2
#define LON_LEN 3
#define NDIMS 3
#define LAT_NAME "Lat"
#define LON_NAME "Lon"
#define TIME_NAME "Time"
#define PRES_NAME "Pressure"
#define TEMP_NAME "Temperature"

        hid_t fileid, grpid, spaceid, write_spaceid, spaceid_in, mem_spaceid;
        hid_t pres_dsid, temp_dsid, cparmsid;
        float float_data_out[LAT_LEN][LON_LEN];
        hsize_t dims[NDIMS], max_dims[NDIMS];
        hsize_t dims_in[NDIMS], max_dims_in[NDIMS];
        hsize_t start[MAX_DIMS], count[MAX_DIMS];
        int lat, lon;

        /* Set up some phoney data, 1 record's worth. In C, first
         * dimension varies most slowly. */
        for (lat = 0; lat < LAT_LEN; lat++)
            for (lon = 0; lon < LON_LEN; lon++)
                float_data_out[lat][lon] = -666.666;

        /* Create file and group. */
        if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT,
                                H5P_DEFAULT)) < 0) ERR;
        if ((grpid = H5Gcreate1(fileid, GRP2_NAME, 0)) < 0) ERR;

        /* Create a space corresponding to these three dimensions. */
        dims[0] = 0;
        dims[1] = LAT_LEN;
        dims[2] = LON_LEN;
        max_dims[0] = H5S_UNLIMITED;
        max_dims[1] = LAT_LEN;
        max_dims[2] = LON_LEN;
        if ((spaceid = H5Screate_simple(NDIMS, dims, max_dims)) < 0) ERR;

        /* Enable chunking for unlimited datasets.  */
        if ((cparmsid = H5Pcreate(H5P_DATASET_CREATE)) < 0) ERR;
        dims[0] = 1;
        dims[1] = 1;
        dims[2] = 1;
        if (H5Pset_chunk(cparmsid, NDIMS, dims) < 0) ERR;

        /* Create two variables which use this space. */
        if ((pres_dsid = H5Dcreate1(grpid, PRES_NAME, H5T_NATIVE_FLOAT,
                                   spaceid, cparmsid)) < 0) ERR;
        if ((temp_dsid = H5Dcreate1(grpid, TEMP_NAME, H5T_NATIVE_FLOAT,
                                   spaceid, cparmsid)) < 0) ERR;

        /* Get the spaceid and check various things. */
        if ((spaceid_in = H5Dget_space(pres_dsid)) < 0) ERR;
        if (H5Sget_simple_extent_dims(spaceid_in, dims_in,
                                      max_dims_in) < 0) ERR;
        if (dims_in[0] != 0 || dims_in[1] != LAT_LEN || dims_in[2] != LON_LEN) ERR;
        if (max_dims_in[0] != H5S_UNLIMITED || max_dims_in[1] != LAT_LEN || max_dims_in[2] != LON_LEN) ERR;

        /* Extend each of them to hold one record. */
        dims[0] = 1;
        dims[1] = LAT_LEN;
        dims[2] = LON_LEN;
        if (H5Dextend(pres_dsid, dims) < 0) ERR;
        if (H5Dextend(temp_dsid, dims) < 0) ERR;

        /* Create a space to deal with one record at a time in memory. */
        if ((mem_spaceid = H5Screate_simple(NDIMS, dims, NULL)) < 0) ERR;

        /* Create a space to write one record. */
        if ((write_spaceid = H5Screate_simple(NDIMS, dims, NULL)) < 0) ERR;

        /* Write one record of data to each dataset. */
        if (H5Dwrite(pres_dsid, H5T_IEEE_F32BE, mem_spaceid, write_spaceid,
                     H5P_DEFAULT, float_data_out) < 0) ERR;
        if (H5Dwrite(temp_dsid, H5T_IEEE_F32LE, mem_spaceid, write_spaceid,
                     H5P_DEFAULT, float_data_out) < 0) ERR;

        /* Get the spaceid and check various things. */
        if ((spaceid_in = H5Dget_space(temp_dsid)) < 0) ERR;
        if (H5Sget_simple_extent_dims(spaceid_in, dims_in,
                                      max_dims_in) < 0) ERR;
        if (dims_in[0] != 1 || dims_in[1] != LAT_LEN || dims_in[2] != LON_LEN) ERR;
        if (max_dims_in[0] != H5S_UNLIMITED || max_dims_in[1] != LAT_LEN || max_dims_in[2] != LON_LEN) ERR;

        /* Extend each of them to hold a second record. */
        dims[0] = 2;
        dims[1] = LAT_LEN;
        dims[2] = LON_LEN;
        if (H5Dextend(pres_dsid, dims) < 0) ERR;
        if (H5Dextend(temp_dsid, dims) < 0) ERR;

        /* Create a space to write second record. */
        if ((write_spaceid = H5Screate_simple(NDIMS, dims, NULL)) < 0) ERR;
        count[0] = 1;
        count[1] = LAT_LEN;
        count[2] = LON_LEN;
        start[0] = 1;
        start[1] = 0;
        start[2] = 0;
        if (H5Sselect_hyperslab(write_spaceid, H5S_SELECT_SET,
                                start, NULL, count, NULL) < 0) ERR;

        /* Write second record of data to each dataset. */
        if (H5Dwrite(pres_dsid, H5T_IEEE_F32LE, mem_spaceid, write_spaceid,
                     H5P_DEFAULT, float_data_out) < 0) ERR;
        if (H5Dwrite(temp_dsid, H5T_IEEE_F32LE, mem_spaceid, write_spaceid,
                     H5P_DEFAULT, float_data_out) < 0) ERR;

        /* Get the spaceid and check various things. */
        if ((spaceid_in = H5Dget_space(pres_dsid)) < 0) ERR;
        if (H5Sget_simple_extent_dims(spaceid_in, dims_in,
                                      max_dims_in) < 0) ERR;
        if (dims_in[0] != 2 || dims_in[1] != LAT_LEN || dims_in[2] != LON_LEN) ERR;
        if (max_dims_in[0] != H5S_UNLIMITED || max_dims_in[1] != LAT_LEN || max_dims_in[2] != LON_LEN) ERR;

        /* Close up the shop. */
        if (H5Dclose(pres_dsid) < 0 ||
            H5Dclose(temp_dsid) < 0 ||
            H5Sclose(spaceid) < 0 ||
            H5Gclose(grpid) < 0 ||
            H5Fclose(fileid) < 0) ERR;

    }

    SUMMARIZE_ERR;
    printf("*** Checking HDF5 deflate filter setting and getting...");
#define DEFLATE_LEVEL 9
#define MAX_NAME 100
#define NUM_CD_ELEM 10
/* HDF5 defines this... */
#define DEFLATE_NAME "deflate"
    {
        H5Z_filter_t filter;
        int num_filters;
        hid_t propid;
        unsigned int flags, cd_values[NUM_CD_ELEM], filter_config;
        size_t cd_nelems = NUM_CD_ELEM;
        size_t namelen = MAX_NAME;
        char name[MAX_NAME + 1];


        /* Open file and create group. */
        if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT,
                                H5P_DEFAULT)) < 0) ERR;
        if ((grpid = H5Gcreate1(fileid, GRP_NAME, 0)) < 0) ERR;

        /* Write an array of bools, with compression. */
        dims[0] = DIM1_LEN;
        if ((propid = H5Pcreate(H5P_DATASET_CREATE)) < 0) ERR;
        if (H5Pset_layout(propid, H5D_CHUNKED)) ERR;
        if (H5Pset_chunk(propid, 1, dims)) ERR;
        if (H5Pset_deflate(propid, DEFLATE_LEVEL)) ERR;
        if ((spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;
        if ((datasetid = H5Dcreate1(grpid, VAR_BOOL_NAME, H5T_NATIVE_HBOOL,
                                   spaceid, propid)) < 0) ERR;
        if (H5Dwrite(datasetid, H5T_NATIVE_HBOOL, H5S_ALL, H5S_ALL, H5P_DEFAULT,
                     bool_out) < 0) ERR;
        if (H5Dclose(datasetid) < 0 ||
            H5Pclose(propid) < 0 ||
            H5Sclose(spaceid) < 0 ||
            H5Gclose(grpid) < 0 ||
            H5Fclose(fileid) < 0)
            ERR;

        /* Now reopen the file and check. */
        if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDONLY, H5P_DEFAULT)) < 0) ERR;
        if ((grpid = H5Gopen1(fileid, GRP_NAME)) < 0) ERR;
        if ((datasetid = H5Dopen1(grpid, VAR_BOOL_NAME)) < 0) ERR;
        if ((propid = H5Dget_create_plist(datasetid)) < 0) ERR;

        /* The possible values of filter (which is just an int) can be
         * found in H5Zpublic.h. */
        if ((num_filters = H5Pget_nfilters(propid)) < 0) ERR;
        if (num_filters != 1) ERR;
        if ((filter = H5Pget_filter2(propid, 0, &flags, &cd_nelems, cd_values,
                                     namelen, name, &filter_config)) < 0) ERR;
        if (filter != H5Z_FILTER_DEFLATE || cd_nelems != 1 ||
            cd_values[0] != DEFLATE_LEVEL || strcmp(name, DEFLATE_NAME)) ERR;

        if (H5Dclose(datasetid) < 0 ||
            H5Pclose(propid) < 0 ||
            H5Gclose(grpid) < 0 ||
            H5Fclose(fileid) < 0)
            ERR;
    }

    SUMMARIZE_ERR;
    printf("*** Checking HDF5 deflate, fletcher32, shuffle filter setting and getting...");
    {
        H5Z_filter_t filter;
        int num_filters;
        hid_t propid;
        unsigned int flags, cd_values[NUM_CD_ELEM], filter_config;
        size_t cd_nelems = NUM_CD_ELEM;
        size_t namelen = MAX_NAME;
        char name[MAX_NAME + 1];
        int found_shuffle = 0, found_fletcher32 = 0, found_deflate = 0;
        int f;

        /* Open file and create group. */
        if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT,
                                H5P_DEFAULT)) < 0) ERR;
        if ((grpid = H5Gcreate1(fileid, GRP_NAME, 0)) < 0) ERR;

        /* Write an array of bools, with compression, fletcher32
         * checksum, shuffle filters. Like a hoogie with "the works." */
        dims[0] = DIM1_LEN;
        if ((propid = H5Pcreate(H5P_DATASET_CREATE)) < 0) ERR;
        if (H5Pset_layout(propid, H5D_CHUNKED)) ERR;
        if (H5Pset_chunk(propid, 1, dims)) ERR;
        if (H5Pset_shuffle(propid)) ERR;
        if (H5Pset_deflate(propid, DEFLATE_LEVEL)) ERR;
        if (H5Pset_fletcher32(propid)) ERR;
        if ((spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;
        if ((datasetid = H5Dcreate1(grpid, VAR_BOOL_NAME, H5T_NATIVE_HBOOL,
                                   spaceid, propid)) < 0) ERR;
        if (H5Dwrite(datasetid, H5T_NATIVE_HBOOL, H5S_ALL, H5S_ALL, H5P_DEFAULT,
                     bool_out) < 0) ERR;
        if (H5Dclose(datasetid) < 0 ||
            H5Pclose(propid) < 0 ||
            H5Sclose(spaceid) < 0 ||
            H5Gclose(grpid) < 0 ||
            H5Fclose(fileid) < 0)
            ERR;

        /* Now reopen the file and check. */
        if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDONLY, H5P_DEFAULT)) < 0) ERR;
        if ((grpid = H5Gopen1(fileid, GRP_NAME)) < 0) ERR;
        if ((datasetid = H5Dopen1(grpid, VAR_BOOL_NAME)) < 0) ERR;
        if ((propid = H5Dget_create_plist(datasetid)) < 0) ERR;

        /* The possible values of filter (which is just an int) can be
         * found in H5Zpublic.h. */
        if ((num_filters = H5Pget_nfilters(propid)) < 0) ERR;
        if (num_filters != 3) ERR;
        for (f = 0; f < num_filters; f++)
        {
            if ((filter = H5Pget_filter2(propid, f, &flags, &cd_nelems, cd_values,
                                         namelen, name, &filter_config)) < 0) ERR;
            switch (filter)
            {
            case H5Z_FILTER_SHUFFLE:
                found_shuffle++;
                break;
            case H5Z_FILTER_FLETCHER32:
                found_fletcher32++;
                break;
            case H5Z_FILTER_DEFLATE:
                found_deflate++;
                if (cd_nelems != 1 || cd_values[0] != DEFLATE_LEVEL ||
                    strcmp(name, DEFLATE_NAME)) ERR;
                break;
            default:
                break;
            }
        }
        if (!found_fletcher32 || !found_deflate || !found_shuffle) ERR;

        if (H5Dclose(datasetid) < 0 ||
            H5Pclose(propid) < 0 ||
            H5Gclose(grpid) < 0 ||
            H5Fclose(fileid) < 0)
            ERR;
    }

    SUMMARIZE_ERR;
    printf("*** Checking HDF5 endianness control...");

#define NATIVE_VAR_NAME "native_var"
#define LE_VAR_NAME "le_var"
#define BE_VAR_NAME "be_var"
    {
        int data[DIM1_LEN], data_in[DIM1_LEN];
        hid_t typeid, native_typeid;
        hid_t native_did, le_did, be_did;
        H5T_order_t order;
        htri_t equal;
        int i;

        for (i = 0; i < DIM1_LEN; i++)
            data[i] = i;

        /* Open file and create group. */
        if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT,
                                H5P_DEFAULT)) < 0) ERR;
        if ((grpid = H5Gcreate1(fileid, GRP_NAME, 0)) < 0) ERR;

        /* Create a dataset of native endian. */
        dims[0] = DIM1_LEN;
        if ((spaceid = H5Screate_simple(1, dims, dims)) < 0) ERR;
        if ((native_did = H5Dcreate1(grpid, NATIVE_VAR_NAME, H5T_NATIVE_INT,
                                    spaceid, H5P_DEFAULT)) < 0) ERR;
        if ((le_did = H5Dcreate1(grpid, LE_VAR_NAME, H5T_STD_I32LE,
                                spaceid, H5P_DEFAULT)) < 0) ERR;
        if ((be_did = H5Dcreate1(grpid, BE_VAR_NAME, H5T_STD_I32BE,
                                spaceid, H5P_DEFAULT)) < 0) ERR;
        if (H5Dwrite(native_did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
                     data) < 0) ERR;
        if (H5Dwrite(le_did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
                     data) < 0) ERR;
        if (H5Dwrite(be_did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
                     data) < 0) ERR;
        if (H5Dclose(native_did) < 0 ||
            H5Dclose(le_did) < 0 ||
            H5Dclose(be_did) < 0 ||
            H5Sclose(spaceid) < 0 ||
            H5Gclose(grpid) < 0 ||
            H5Fclose(fileid) < 0)
            ERR;

        /* Now reopen the file and check. */
        if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDONLY, H5P_DEFAULT)) < 0) ERR;
        if ((grpid = H5Gopen1(fileid, GRP_NAME)) < 0) ERR;

        if ((native_did = H5Dopen1(grpid, NATIVE_VAR_NAME)) < 0) ERR;
        if ((typeid = H5Dget_type(native_did)) < 0) ERR;
        if ((native_typeid = H5Tget_native_type(typeid, H5T_DIR_DESCEND)) < 0) ERR;
        if ((order = H5Tget_order(typeid)) < 0) ERR;
        if ((equal = H5Tequal(typeid, native_typeid)) < 0) ERR;
        if (!equal) ERR;

        if (H5Dread(native_did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
                    data_in) < 0) ERR;
        for (i = 0; i < DIM1_LEN; i++)
            if (data[i] != data_in[i]) ERR;

        if ((le_did = H5Dopen1(grpid, LE_VAR_NAME)) < 0) ERR;
        if ((typeid = H5Dget_type(le_did)) < 0) ERR;
        if ((order = H5Tget_order(typeid)) < 0) ERR;
        if (order != H5T_ORDER_LE) ERR;

        if (H5Dread(le_did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
                    data_in) < 0) ERR;
        for (i = 0; i < DIM1_LEN; i++)
            if (data[i] != data_in[i]) ERR;

        if ((be_did = H5Dopen1(grpid, BE_VAR_NAME)) < 0) ERR;
        if ((typeid = H5Dget_type(be_did)) < 0) ERR;
        if ((order = H5Tget_order(typeid)) < 0) ERR;
        if (order != H5T_ORDER_BE) ERR;

        if (H5Dread(be_did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
                    data_in) < 0) ERR;
        for (i = 0; i < DIM1_LEN; i++)
            if (data[i] != data_in[i]) ERR;

        if (H5Dclose(native_did) < 0 ||
            H5Dclose(le_did) < 0 ||
            H5Dclose(be_did) < 0 ||
            H5Gclose(grpid) < 0 ||
            H5Fclose(fileid) < 0)
            ERR;
    }

    SUMMARIZE_ERR;
#ifdef USE_SZIP
    printf("*** Checking szip functionality...");
#define SZIP_VAR_NAME "szip_var"
#define SZIP_DIM1_LEN 32
    {
        int data[SZIP_DIM1_LEN];
        hid_t plistid;
        hsize_t chunksize[NDIM1] = {SZIP_DIM1_LEN};
        int options_mask = 32, pixels_per_block = 4;
        hsize_t my_dims[NDIM1];
        int i;

        /* For info about HDF5 and szip, see
         * https://support.hdfgroup.org/HDF5/doc/RM/RM_H5P.html#Property-SetSzip
         * and
         * https://support.hdfgroup.org/doc_resource/SZIP/index.html. */

        for (i = 0; i < SZIP_DIM1_LEN; i++)
            data[i] = i;

        /* Open file and create group. */
        if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT,
                                H5P_DEFAULT)) < 0) ERR;
        if ((grpid = H5Gcreate1(fileid, GRP_NAME, 0)) < 0) ERR;

        /* Create dataset creation property list. */
        if ((plistid = H5Pcreate(H5P_DATASET_CREATE)) < 0) ERR;

        /* Turn on chunking. */
        if (H5Pset_chunk(plistid, NDIM1, chunksize) < 0) ERR;

        /* Turn off object tracking times in HDF5 (as netcdf-4 does). */
        if (H5Pset_obj_track_times(plistid, 0) < 0) ERR;

        /* Turn on szip compression. */
        if (H5Pset_szip(plistid, options_mask, pixels_per_block) < 0) ERR;

        /* Create a space. */
        my_dims[0] = SZIP_DIM1_LEN;
        if ((spaceid = H5Screate_simple(1, my_dims, my_dims)) < 0) ERR;

        /* Create a dataset. */
        if ((datasetid = H5Dcreate2(grpid, SZIP_VAR_NAME, H5T_NATIVE_INT,
                                    spaceid, H5P_DEFAULT, plistid,
                                    H5P_DEFAULT)) < 0) ERR;

        /* Write data. */
        if (H5Dwrite(datasetid, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
                     data) < 0) ERR;

        /* Release resources. */
        if (H5Dclose(datasetid) < 0 ||
            H5Sclose(spaceid) < 0 ||
            H5Pclose(plistid) < 0 ||
            H5Gclose(grpid) < 0 ||
            H5Fclose(fileid) < 0)
            ERR;

        {
            /* Now reopen the file and check. */
            int data_in[SZIP_DIM1_LEN];
            hid_t native_did;
            int i;

            if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDONLY, H5P_DEFAULT)) < 0) ERR;
            if ((grpid = H5Gopen1(fileid, GRP_NAME)) < 0) ERR;

            if ((native_did = H5Dopen1(grpid, SZIP_VAR_NAME)) < 0) ERR;

            if (H5Dread(native_did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
                        data_in) < 0) ERR;
            for (i = 0; i < SZIP_DIM1_LEN; i++)
                if (data[i] != data_in[i]) ERR;

            if (H5Dclose(native_did) < 0 ||
                H5Gclose(grpid) < 0 ||
                H5Fclose(fileid) < 0)
                ERR;
        }
    }
    SUMMARIZE_ERR;
    printf("*** Checking using szip and zlib on same var...");
#define BOTH_VAR_NAME "szip_var"
#define BOTH_DIM1_LEN 50
#define NUM_FILE 5
#define MAX_STR 80
    {
        int data[BOTH_DIM1_LEN];
        hid_t plistid;
        hsize_t chunksize[NDIM1] = {BOTH_DIM1_LEN};
        int options_mask = 32, pixels_per_block = 4;
        int deflate_level = 3;
        hsize_t my_dims[NDIM1];
        int i, f;

        /* Create data. */
        for (i = 0; i < BOTH_DIM1_LEN; i++)
            data[i] = i;

        /* Run test 4 times. */
        for (f = 0; f < NUM_FILE; f++)
        {
            char file_name[MAX_STR * 2 + 1];
            char desc[NUM_FILE][MAX_STR + 1] = {"uncompressed", "zlib",
                                                "szip", "zlib_and_szip",
                                                "szip_and_zlib"};

            /* Open file and create group. */
            sprintf(file_name, "%s_%s.h5", TEST_NAME, desc[f]);
            if ((fileid = H5Fcreate(file_name, H5F_ACC_TRUNC, H5P_DEFAULT,
                                    H5P_DEFAULT)) < 0) ERR;
            if ((grpid = H5Gcreate1(fileid, GRP_NAME, 0)) < 0) ERR;

            /* Create dataset creation property list. */
            if ((plistid = H5Pcreate(H5P_DATASET_CREATE)) < 0) ERR;

            /* Turn on chunking. */
            if (H5Pset_chunk(plistid, NDIM1, chunksize) < 0) ERR;

            /* Turn off object tracking times in HDF5 (as netcdf-4 does). */
            if (H5Pset_obj_track_times(plistid, 0) < 0) ERR;

            /* Turn on compression for some files. */
            switch (f)
            {
            case 1:
                if (H5Pset_deflate(plistid, deflate_level) < 0)
                    break;
            case 2:
                if (H5Pset_szip(plistid, options_mask, pixels_per_block) < 0) ERR;
                break;
            case 3:
                if (H5Pset_deflate(plistid, deflate_level) < 0)
                if (H5Pset_szip(plistid, options_mask, pixels_per_block) < 0) ERR;
                break;
            case 4:
                if (H5Pset_szip(plistid, options_mask, pixels_per_block) < 0) ERR;
                if (H5Pset_deflate(plistid, deflate_level) < 0)
                break;
            }


            /* Create a space. */
            my_dims[0] = BOTH_DIM1_LEN;
            if ((spaceid = H5Screate_simple(1, my_dims, my_dims)) < 0) ERR;

            /* Create a dataset. */
            if ((datasetid = H5Dcreate2(grpid, BOTH_VAR_NAME, H5T_NATIVE_INT,
                                        spaceid, H5P_DEFAULT, plistid,
                                        H5P_DEFAULT)) < 0) ERR;

            /* Write data. */
            if (H5Dwrite(datasetid, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
                         data) < 0) ERR;

            /* Release resources. */
            if (H5Dclose(datasetid) < 0 ||
                H5Sclose(spaceid) < 0 ||
                H5Pclose(plistid) < 0 ||
                H5Gclose(grpid) < 0 ||
                H5Fclose(fileid) < 0)
                ERR;

            {
                /* Now reopen the file and check. */
                int data_in[BOTH_DIM1_LEN];
                hid_t native_did;
                int i;

                if ((fileid = H5Fopen(file_name, H5F_ACC_RDONLY, H5P_DEFAULT)) < 0) ERR;
                if ((grpid = H5Gopen1(fileid, GRP_NAME)) < 0) ERR;

                if ((native_did = H5Dopen1(grpid, BOTH_VAR_NAME)) < 0) ERR;

                if (H5Dread(native_did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
                            data_in) < 0) ERR;
                for (i = 0; i < BOTH_DIM1_LEN; i++)
                    if (data[i] != data_in[i]) ERR;

                if (H5Dclose(native_did) < 0 ||
                    H5Gclose(grpid) < 0 ||
                    H5Fclose(fileid) < 0)
                    ERR;
            }
        } /* next file */
    }
    SUMMARIZE_ERR;
#endif /* USE_SZIP */
    FINAL_RESULTS;
}