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https://github.com/Unidata/netcdf-c.git
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91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
#include <hdf5.h>
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#include <hdf5_hl.h>
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#include <nc_tests.h>
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#include "err_macros.h"
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#define FILE_NAME_A "tst_virtual_a.nc"
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#define FILE_NAME_B "tst_virtual_b.nc"
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#define VARIABLE_SIZE 5
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#define VARIABLE_NAME "v"
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static void
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create_dataset_a() {
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hsize_t dims[1] = {VARIABLE_SIZE};
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float data[VARIABLE_SIZE];
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size_t i;
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for(i = 0; i < VARIABLE_SIZE; ++i) {
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data[i] = (float)i;
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}
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hid_t file = H5Fcreate(FILE_NAME_A, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
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hid_t space = H5Screate_simple(1, dims, NULL);
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hid_t dset = H5Dcreate2(file, VARIABLE_NAME, H5T_IEEE_F32LE, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
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H5Dwrite(dset, H5T_IEEE_F32LE, H5S_ALL, H5S_ALL, H5P_DEFAULT, data);
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H5DSset_scale(dset, VARIABLE_NAME);
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H5Dclose(dset);
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H5Sclose(space);
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H5Fclose(file);
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}
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static void
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create_dataset_b() {
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hsize_t dims[1] = {VARIABLE_SIZE};
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hid_t file = H5Fcreate(FILE_NAME_B, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
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hid_t src_space = H5Screate_simple(1, dims, NULL);
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hid_t space = H5Screate_simple(1, dims, NULL);
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hid_t dcpl = H5Pcreate(H5P_DATASET_CREATE);
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H5Pset_virtual(dcpl, space, FILE_NAME_A, VARIABLE_NAME, src_space);
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hid_t dset = H5Dcreate2(file, VARIABLE_NAME, H5T_IEEE_F32LE, space, H5P_DEFAULT, dcpl, H5P_DEFAULT);
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H5DSset_scale(dset, VARIABLE_NAME);
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H5Dclose(dset);
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H5Pclose(dcpl);
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H5Sclose(space);
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H5Sclose(src_space);
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H5Fclose(file);
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}
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int read_back_contents(const char* filename) {
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int ncid, varid, ndims;
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size_t i;
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float data[VARIABLE_SIZE];
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char var_name[NC_MAX_NAME+1];
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int dimids_var[1], var_type, natts;
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printf("\treading back %s.\n", filename);
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if (nc_open(filename, 0, &ncid)) ERR;
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if (nc_inq_varid(ncid, VARIABLE_NAME, &varid)) ERR;
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if (nc_inq_var(ncid, varid, var_name, &var_type, &ndims, dimids_var, &natts)) ERR;
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if (nc_get_var_float(ncid, varid, data)) ERR;
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printf("\t %s: ", var_name);
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for (i = 0; i < VARIABLE_SIZE; ++i) {
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printf("%f, ", data[i]);
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}
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printf("\n");
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if (nc_close(ncid)) ERR;
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SUMMARIZE_ERR;
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return 0;
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}
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int
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main(int argc, char **argv)
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{
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printf("\n*** Testing reading of virtual datasets.\n");
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create_dataset_a();
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create_dataset_b();
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int status;
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if((status = read_back_contents(FILE_NAME_A))) return status;
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if((status = read_back_contents(FILE_NAME_B))) return status;
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}
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