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