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author | Jerome Soumagne <jsoumagne@hdfgroup.org> | 2019-07-16 16:15:43 (GMT) |
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committer | Jerome Soumagne <jsoumagne@hdfgroup.org> | 2019-10-08 20:19:21 (GMT) |
commit | dabdcf95593aa97185c83006f35a0849ea012450 (patch) | |
tree | d8e20aa27fb16271e9ef355694475ca2c4437ff5 /examples/h5_reference.c | |
parent | e9570c198b7950dd7459cd005068d772b33c7fd4 (diff) | |
download | hdf5-dabdcf95593aa97185c83006f35a0849ea012450.zip hdf5-dabdcf95593aa97185c83006f35a0849ea012450.tar.gz hdf5-dabdcf95593aa97185c83006f35a0849ea012450.tar.bz2 |
Add new H5R API that abstracts object, region and attribute reference types
Also support references to external files
Add new H5T_REF type and type conversion routines
Support conversion from H5T_REF_OBJ/DSET_REG to H5T_REF
Add H5Treclaim() API to reclaim memory of vlen/reference types
Deprecate H5Dvlen_reclaim()
Fix H5T_vlen_reclaim() and H5T_reclaim() to use private callback
Add H5T_ref_reclaim()
Move previous H5R APIs to H5Rdeprec.c
Clean up H5Ocopy
Separate H5O_copy_expand_ref() to H5Ocopy_ref()
Add support for copying new reference types
Clean up deprecated routines to go through VOL and same code path
Fix return codes in existing trefer.c test
Rename trefer.c to trefer_deprec.c
trefer.c is for new references
Add performance test for trefer
Add additional obj_copy_ref test
Make use of tokens and blobs to store references
Skip blob encoding for object references
Start adding new reference examples
Diffstat (limited to 'examples/h5_reference.c')
-rw-r--r-- | examples/h5_reference.c | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/examples/h5_reference.c b/examples/h5_reference.c deleted file mode 100644 index 32a5f59..0000000 --- a/examples/h5_reference.c +++ /dev/null @@ -1,147 +0,0 @@ -/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * - * 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 illustrates how references to objects can be used. - * Program creates a dataset and a group in a file. It also creates - * second dataset, and references to the first dataset and the group - * are stored in it. - * Program reopens the file and reads dataset with the references. - * References are used to open the objects. Information about the - * objects is displayed. - */ - -#include <stdlib.h> - -#include "hdf5.h" - -#define H5FILE_NAME "refere.h5" - -int -main(void) { - hid_t fid; /* File, group, datasets, datatypes */ - hid_t gid_a; /* and dataspaces identifiers */ - hid_t did_b, sid_b, tid_b; - hid_t did_r, tid_r, sid_r; - H5O_type_t obj_type; - herr_t status; - - hobj_ref_t *wbuf; /* buffer to write to disk */ - hobj_ref_t *rbuf; /* buffer to read from disk */ - - - hsize_t dim_r[1]; - hsize_t dim_b[2]; - - /* - * Create a file using default properties. - */ - fid = H5Fcreate(H5FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT); - - /* - * Create group "A" in the file. - */ - gid_a = H5Gcreate2(fid, "A", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT); - - /* - * Create dataset "B" in the file. - */ - dim_b[0] = 2; - dim_b[1] = 6; - sid_b = H5Screate_simple(2, dim_b, NULL); - did_b = H5Dcreate2(fid, "B", H5T_NATIVE_FLOAT, sid_b, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT); - - /* - * Create dataset "R" to store references to the objects "A" and "B". - */ - dim_r[0] = 2; - sid_r = H5Screate_simple(1, dim_r, NULL); - tid_r = H5Tcopy(H5T_STD_REF_OBJ); - did_r = H5Dcreate2(fid, "R", tid_r, sid_r, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT); - - /* - * Allocate write and read buffers. - */ - wbuf = (hobj_ref_t *)malloc(sizeof(hobj_ref_t) * 2); - rbuf = (hobj_ref_t *)malloc(sizeof(hobj_ref_t) * 2); - - /* - * Create references to the group "A" and dataset "B" - * and store them in the wbuf. - */ - H5Rcreate(&wbuf[0], fid, "A", H5R_OBJECT, (hid_t)-1); - H5Rcreate(&wbuf[1], fid, "B", H5R_OBJECT, (hid_t)-1); - - /* - * Write dataset R using default transfer properties. - */ - status = H5Dwrite(did_r, H5T_STD_REF_OBJ, H5S_ALL, H5S_ALL, H5P_DEFAULT, wbuf); - - /* - * Close all objects. - */ - H5Gclose(gid_a); - - H5Sclose(sid_b); - H5Dclose(did_b); - - H5Tclose(tid_r); - H5Sclose(sid_r); - H5Dclose(did_r); - - H5Fclose(fid); - - /* - * Reopen the file. - */ - fid = H5Fopen(H5FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT); - - /* - * Open and read dataset "R". - */ - did_r = H5Dopen2(fid, "R", H5P_DEFAULT); - status = H5Dread(did_r, H5T_STD_REF_OBJ, H5S_ALL, H5S_ALL, H5P_DEFAULT, rbuf); - - /* - * Find the type of referenced objects. - */ - status = H5Rget_obj_type2(did_r, H5R_OBJECT, &rbuf[0], &obj_type); - if(obj_type == H5O_TYPE_GROUP) - printf("First dereferenced object is a group. \n"); - - status = H5Rget_obj_type2(did_r, H5R_OBJECT, &rbuf[1], &obj_type); - if(obj_type == H5O_TYPE_DATASET) - printf("Second dereferenced object is a dataset. \n"); - - /* - * Get datatype of the dataset "B" - */ - did_b = H5Rdereference2(did_r, H5P_DEFAULT, H5R_OBJECT, &rbuf[1]); - tid_b = H5Dget_type(did_b); - if(H5Tequal(tid_b, H5T_NATIVE_FLOAT)) - printf("Datatype of the dataset is H5T_NATIVE_FLOAT.\n"); - printf("\n"); - - /* - * Close all objects and free memory buffers. - */ - H5Dclose(did_r); - H5Dclose(did_b); - H5Tclose(tid_b); - H5Fclose(fid); - free(rbuf); - free(wbuf); - - return 0; - } - |