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/* -*- c-file-style: "stroustrup" -*- */
#include "hdf5.h"
#include <stdio.h>
#include <stdlib.h>
int
main(void)
{
int ret_val = EXIT_SUCCESS;
//! <!-- [create] -->
{
__label__ fail_lcpl, fail_dset, fail_file;
hid_t file, lcpl, fspace, dset;
unsigned mode = H5F_ACC_TRUNC;
char file_name[] = "d1.h5";
// link names can be arbitrary Unicode strings
char dset_name[] = "σύνολο/δεδομένων";
if ((file = H5Fcreate(file_name, mode, H5P_DEFAULT, H5P_DEFAULT)) == H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_file;
}
if ((lcpl = H5Pcreate(H5P_LINK_CREATE)) == H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_lcpl;
}
// use UTF-8 encoding for link names
if (H5Pset_char_encoding(lcpl, H5T_CSET_UTF8) < 0) {
ret_val = EXIT_FAILURE;
goto fail_fspace;
}
// create intermediate groups as needed
if (H5Pset_create_intermediate_group(lcpl, 1) < 0) {
ret_val = EXIT_FAILURE;
goto fail_fspace;
}
// create a 1D dataspace
if ((fspace = H5Screate_simple(1, (hsize_t[]){10}, NULL)) == H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_fspace;
}
// create a 32-bit integer dataset
if ((dset = H5Dcreate2(file, dset_name, H5T_STD_I32LE, fspace, lcpl, H5P_DEFAULT, H5P_DEFAULT)) ==
H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_dset;
}
H5Dclose(dset);
fail_dset:
H5Sclose(fspace);
fail_fspace:
H5Pclose(lcpl);
fail_lcpl:
H5Fclose(file);
fail_file:;
}
//! <!-- [create] -->
//! <!-- [read] -->
{
__label__ fail_dset, fail_file;
hid_t file, dset;
unsigned mode = H5F_ACC_RDONLY;
char file_name[] = "d1.h5";
// assume a priori knowledge of dataset name and size
char dset_name[] = "σύνολο/δεδομένων";
int elts[10];
if ((file = H5Fopen(file_name, mode, H5P_DEFAULT)) == H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_file;
}
if ((dset = H5Dopen2(file, dset_name, H5P_DEFAULT)) == H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_dset;
}
// read all dataset elements
if (H5Dread(dset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, elts) < 0)
ret_val = EXIT_FAILURE;
// do something w/ the dataset elements
H5Dclose(dset);
fail_dset:
H5Fclose(file);
fail_file:;
}
//! <!-- [read] -->
//! <!-- [update] -->
{
__label__ fail_update, fail_fspace, fail_dset, fail_file;
hid_t file, dset, fspace;
unsigned mode = H5F_ACC_RDWR;
char file_name[] = "d1.h5";
char dset_name[] = "σύνολο/δεδομένων";
int new_elts[6][2] = {{-1, 1}, {-2, 2}, {-3, 3}, {-4, 4}, {-5, 5}, {-6, 6}};
if ((file = H5Fopen(file_name, mode, H5P_DEFAULT)) == H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_file;
}
if ((dset = H5Dopen2(file, dset_name, H5P_DEFAULT)) == H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_dset;
}
// get the dataset's dataspace
if ((fspace = H5Dget_space(dset)) == H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_fspace;
}
// select the first 5 elements in odd positions
if (H5Sselect_hyperslab(fspace, H5S_SELECT_SET, (hsize_t[]){1}, (hsize_t[]){2}, (hsize_t[]){5},
NULL) < 0) {
ret_val = EXIT_FAILURE;
goto fail_update;
}
// (implicitly) select and write the first 5 elements of the second column of NEW_ELTS
if (H5Dwrite(dset, H5T_NATIVE_INT, H5S_ALL, fspace, H5P_DEFAULT, new_elts) < 0)
ret_val = EXIT_FAILURE;
fail_update:
H5Sclose(fspace);
fail_fspace:
H5Dclose(dset);
fail_dset:
H5Fclose(file);
fail_file:;
}
//! <!-- [update] -->
//! <!-- [delete] -->
{
__label__ fail_delete, fail_file;
hid_t file;
unsigned mode = H5F_ACC_RDWR;
char file_name[] = "d1.h5";
char group_name[] = "σύνολο";
char dset_name[] = "σύνολο/δεδομένων";
if ((file = H5Fopen(file_name, mode, H5P_DEFAULT)) == H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_file;
}
// delete (unlink) the dataset
if (H5Ldelete(file, dset_name, H5P_DEFAULT) < 0) {
ret_val = EXIT_FAILURE;
goto fail_delete;
}
// the previous call deletes (unlinks) only the dataset
if (H5Ldelete(file, group_name, H5P_DEFAULT) < 0) {
ret_val = EXIT_FAILURE;
goto fail_delete;
}
fail_delete:
H5Fclose(file);
fail_file:;
}
//! <!-- [delete] -->
return ret_val;
}
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