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/* -*- c-file-style: "stroustrup" -*- */
#include "hdf5.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
int
main(void)
{
int ret_val = EXIT_SUCCESS;
//! <!-- [create] -->
{
__label__ fail_group, fail_prop, fail_lcpl, fail_file;
hid_t file, lcpl, group;
char fname[] = "g1.h5";
char path[] = "/αυτή/είναι/μια/νέα/ομάδα";
if ((file = H5Fcreate(fname, H5F_ACC_TRUNC, 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;
}
// ensure that intermediate groups are created automatically
if (H5Pset_create_intermediate_group(lcpl, 1) < 0) {
ret_val = EXIT_FAILURE;
goto fail_prop;
}
// use UTF-8 encoding for link names
if (H5Pset_char_encoding(lcpl, H5T_CSET_UTF8) < 0) {
ret_val = EXIT_FAILURE;
goto fail_prop;
}
// create five groups
if ((group = H5Gcreate(file, path, lcpl, H5P_DEFAULT, H5P_DEFAULT)) == H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_group;
}
H5Gclose(group);
fail_group:
fail_prop:
H5Pclose(lcpl);
fail_lcpl:
H5Fclose(file);
fail_file:;
}
//! <!-- [create] -->
//! <!-- [read] -->
{
__label__ fail_file;
char fname[] = "g1.h5";
char path[] = "/αυτή/είναι";
hid_t file;
H5G_info_t info;
if ((file = H5Fopen(fname, H5F_ACC_RDONLY, H5P_DEFAULT)) == H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_file;
}
// open one of the intermediate groups
if (H5Gget_info_by_name(file, path, &info, H5P_DEFAULT) < 0) {
ret_val = EXIT_FAILURE;
goto fail_info;
}
printf("Link count: %llu\n", info.nlinks);
switch (info.storage_type) {
case H5G_STORAGE_TYPE_COMPACT:
printf("Compact storage\n");
break;
case H5G_STORAGE_TYPE_DENSE:
printf("Compact storage\n");
break;
case H5G_STORAGE_TYPE_SYMBOL_TABLE:
printf("Symbol table\n");
break;
default:
printf("UFO\n");
break;
}
fail_info:
H5Fclose(file);
fail_file:;
}
//! <!-- [read] -->
//! <!-- [update] -->
{
__label__ fail_group, fail_prop, fail_lcpl, fail_file;
hid_t file, lcpl, group;
char fname[] = "g1.h5";
char path[] = "/αυτή/είναι/μια/άλλη/νέα/ομάδα";
if ((file = H5Fopen(fname, H5F_ACC_RDWR, 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;
}
// ensure that intermediate groups are created automatically
if (H5Pset_create_intermediate_group(lcpl, 1) < 0) {
ret_val = EXIT_FAILURE;
goto fail_prop;
}
// use UTF-8 encoding for link names
if (H5Pset_char_encoding(lcpl, H5T_CSET_UTF8) < 0) {
ret_val = EXIT_FAILURE;
goto fail_prop;
}
// create an anonymous group
if ((group = H5Gcreate_anon(file, H5P_DEFAULT, H5P_DEFAULT)) == H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_group;
}
// link the new group to existing the group at "/αυτή/είναι/μια"
if (H5Lcreate_hard(group, ".", file, path, lcpl, H5P_DEFAULT) < 0) {
ret_val = EXIT_FAILURE;
}
H5Gclose(group);
fail_group:
fail_prop:
H5Pclose(lcpl);
fail_lcpl:
H5Fclose(file);
fail_file:;
}
//! <!-- [update] -->
//! <!-- [delete] -->
{
__label__ fail_info, fail_object, fail_file;
hid_t file, obj;
char fname[] = "g1.h5";
char path[] = "/αυτή/είναι/μια/άλλη/νέα/ομάδα";
char delete_path[] = "/αυτή/είναι/μια";
H5O_info_t info;
if ((file = H5Fopen(fname, H5F_ACC_RDWR, H5P_DEFAULT)) == H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_file;
}
// open a "leaf" group as object
if ((obj = H5Oopen(file, path, H5P_DEFAULT)) == H5I_INVALID_HID) {
ret_val = EXIT_FAILURE;
goto fail_object;
}
// delete the link to an intermediate group on the path to the leaf
if (H5Ldelete(file, delete_path, H5P_DEFAULT) < 0) {
ret_val = EXIT_FAILURE;
}
// link deletion will propagate along hard links along all paths
// reachable from the intermediate group and cause reference counts to
// be decremented, freeing the objects if the count reaches 0
if (H5Oget_info(obj, &info, H5O_INFO_BASIC) < 0) {
ret_val = EXIT_FAILURE;
goto fail_info;
}
printf("Leaf reference count: %d\n", info.rc);
fail_info:
H5Oclose(obj);
fail_object:
H5Fclose(file);
fail_file:;
}
//! <!-- [delete] -->
assert(ret_val == EXIT_SUCCESS);
return ret_val;
}
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