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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* This program checks if group exists in a file and creates it including
* all intermediate groups.
*/
#include "hdf5.h"
#define H5FILE_NAME "interm_group.h5"
#define TRUE 1
#define FALSE 0
int
main(void)
{
hid_t file;
hid_t g1_id, g2_id, g3_id;
hid_t grp_crt_plist;
H5G_info_t g2_info;
char name[3];
herr_t status;
int i;
/*
* Create a file using the default properties.
*/
file = H5Fcreate(H5FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
/*
* Create a group in the file.
*/
g1_id = H5Gcreate2(file, "/G1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
H5Gclose(g1_id);
H5Fclose(file);
/*
* Now reopen the file and group in the file.
*/
file = H5Fopen(H5FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT);
/*
* Check if group /G1 exists in the file.
*/
if(H5Lexists(file, "/G1", H5P_DEFAULT) !=FALSE)
printf("Group /G1 exists in the file\n");
/*
* Check that group G2/G3 exists in /G1 and if not create it using
* intermediate group creation property.
*/
g1_id = H5Gopen2(file, "/G1", H5P_DEFAULT);
/* Next commented call causes error stack to be printed out; the next one
* works fine; is it a bug or a feature? EIP 04-25-07
*/
/* if (H5Lexists(g1_id, "G2/G3", H5P_DEFAULT) !=TRUE) { */
if (H5Lexists(g1_id, "G2", H5P_DEFAULT) !=TRUE) {
grp_crt_plist = H5Pcreate(H5P_LINK_CREATE);
/* Set flag for intermediate group creation */
status = H5Pset_create_intermediate_group(grp_crt_plist, TRUE);
g3_id = H5Gcreate2(g1_id, "G2/G3", grp_crt_plist, H5P_DEFAULT, H5P_DEFAULT);
H5Gclose(g3_id);
}
H5Gclose(g1_id);
/* Now check if group /G1/G2 exists in the file, then open it and print
* its members names
*/
if (H5Lexists(file, "/G1/G2", H5P_DEFAULT)) {
g2_id = H5Gopen2(file, "/G1/G2", H5P_DEFAULT);
status = H5Gget_info(g2_id, &g2_info);
printf("Group /G1/G2 has %d member(s)\n", (int)g2_info.nlinks);
for (i=0; i < (int)g2_info.nlinks; i++) {
H5Lget_name_by_idx(g2_id, ".", H5_INDEX_NAME, H5_ITER_NATIVE, (hsize_t)i,
name, 3, H5P_DEFAULT);
printf("Object's name is %s\n", name);
}
H5Gclose(g2_id);
}
H5Fclose(file);
return 0;
}
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