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authorAllen Byrne <50328838+byrnHDF@users.noreply.github.com>2024-01-03 20:17:46 (GMT)
committerGitHub <noreply@github.com>2024-01-03 20:17:46 (GMT)
commit772276ea1f6f8b150a22eff3a908eff24ccc50a7 (patch)
tree29d4f2850422dccf3b4e057786f9766b8e2adc54 /examples/h5_vds-percival.c
parent8f1a93f1a208055c9b872a06be28a20e72f8f488 (diff)
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Remove examples that have been moved to HDF5Examples folder (#3917)
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diff --git a/examples/h5_vds-percival.c b/examples/h5_vds-percival.c
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-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Copyright by The HDF Group. *
- * 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://www.hdfgroup.org/licenses. *
- * If you do not have access to either file, you may request a copy from *
- * help@hdfgroup.org. *
- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-/************************************************************
-
- This example illustrates the concept of the virtual dataset.
- Percival use case. Every fifth 10x10 plane in VDS is stored in
- the corresponding 3D unlimited dataset.
- EIP: For now we will use finite dimension.
- There are 4 source datasets total.
- This file is intended for use with HDF5 Library version 1.10
-
- ************************************************************/
-/* EIP Add link to the picture */
-
-#include "hdf5.h"
-#include <stdio.h>
-#include <stdlib.h>
-
-#define FILE "vds-percival.h5"
-#define DATASET "VDS-Percival"
-/* later
-#define VDSDIM0 H5S_UNLIMITED
-*/
-#define VDSDIM0 40
-#define VDSDIM1 10
-#define VDSDIM2 10
-/* later
-#define DIM0 H5S_UNLIMITED
-*/
-#define DIM0 10
-#define DIM1 10
-#define DIM2 10
-#define RANK 3
-#define PLANE_STRIDE 4
-
-const char *SRC_FILE[] = {"a.h5", "b.h5", "c.h5", "d.h5"};
-
-const char *SRC_DATASET[] = {"A", "B", "C", "D"};
-
-int
-main(void)
-{
- hid_t file, src_space, vspace, dset; /* Handles */
- hid_t dcpl;
- herr_t status;
- hsize_t vdsdims[3] = {VDSDIM0, VDSDIM1, VDSDIM2}, vdsdims_max[3] = {VDSDIM0, VDSDIM1, VDSDIM2},
- dims[3] = {DIM0, DIM1, DIM2}, dims_max[3] = {DIM0, DIM1, DIM2},
- start[3], /* Hyperslab start parameter for VDS */
- stride[3], count[3], src_count[3], block[3];
- hsize_t start_out[3], /* Hyperslab parameter out */
- stride_out[3], count_out[3], block_out[3];
- int i, j;
- H5D_layout_t layout; /* Storage layout */
- size_t num_map; /* Number of mappings */
- ssize_t len; /* Length of the string; also a return value */
- char *filename;
- char *dsetname;
- int wdata[DIM0 * DIM1 * DIM2];
-
- /*
- * Create source files and datasets. This step is optional.
- */
- for (i = 0; i < PLANE_STRIDE; i++) {
- /*
- * Initialize data for i-th source dataset.
- */
- for (j = 0; j < DIM0 * DIM1 * DIM2; j++)
- wdata[j] = i + 1;
-
- /*
- * Create the source files and datasets. Write data to each dataset and
- * close all resources.
- */
-
- file = H5Fcreate(SRC_FILE[i], H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
- src_space = H5Screate_simple(RANK, dims, NULL);
- dset = H5Dcreate2(file, SRC_DATASET[i], H5T_NATIVE_INT, src_space, H5P_DEFAULT, H5P_DEFAULT,
- H5P_DEFAULT);
- status = H5Dwrite(dset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata);
- status = H5Sclose(src_space);
- status = H5Dclose(dset);
- status = H5Fclose(file);
- }
-
- file = H5Fcreate(FILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
-
- /* Create VDS dataspace. */
- vspace = H5Screate_simple(RANK, vdsdims, vdsdims_max);
-
- /* Create dataspaces for the source dataset. */
- src_space = H5Screate_simple(RANK, dims, dims_max);
-
- /* Create VDS creation property */
- dcpl = H5Pcreate(H5P_DATASET_CREATE);
-
- /* Initialize hyperslab values */
-
- start[0] = 0;
- start[1] = 0;
- start[2] = 0;
- stride[0] = PLANE_STRIDE; /* we will select every fifth plane in VDS */
- stride[1] = 1;
- stride[2] = 1;
- /* later
- count[0] = H5S_UNLIMITED;
- */
- count[0] = VDSDIM0 / 4;
- count[1] = 1;
- count[2] = 1;
- /* later
- src_count[0] = H5S_UNLIMITED;
- */
- src_count[0] = DIM0;
- src_count[1] = 1;
- src_count[2] = 1;
- block[0] = 1;
- block[1] = DIM1;
- block[2] = DIM2;
-
- /*
- * Build the mappings
- *
- */
- status = H5Sselect_hyperslab(src_space, H5S_SELECT_SET, start, NULL, src_count, block);
- for (i = 0; i < PLANE_STRIDE; i++) {
- status = H5Sselect_hyperslab(vspace, H5S_SELECT_SET, start, stride, count, block);
- status = H5Pset_virtual(dcpl, vspace, SRC_FILE[i], SRC_DATASET[i], src_space);
- start[0]++;
- }
-
- H5Sselect_none(vspace);
-
- /* Create a virtual dataset */
- dset = H5Dcreate2(file, DATASET, H5T_NATIVE_INT, vspace, H5P_DEFAULT, dcpl, H5P_DEFAULT);
- status = H5Sclose(vspace);
- status = H5Sclose(src_space);
- status = H5Dclose(dset);
- status = H5Fclose(file);
-
- /*
- * Now we begin the read section of this example.
- */
-
- /*
- * Open file and dataset using the default properties.
- */
- file = H5Fopen(FILE, H5F_ACC_RDONLY, H5P_DEFAULT);
- dset = H5Dopen2(file, DATASET, H5P_DEFAULT);
-
- /*
- * Get creation property list and mapping properties.
- */
- dcpl = H5Dget_create_plist(dset);
-
- /*
- * Get storage layout.
- */
- layout = H5Pget_layout(dcpl);
-
- if (H5D_VIRTUAL == layout)
- printf(" Dataset has a virtual layout \n");
- else
- printf(" Wrong layout found \n");
-
- /*
- * Find number of mappings.
- */
- status = H5Pget_virtual_count(dcpl, &num_map);
- printf(" Number of mappings is %lu\n", (unsigned long)num_map);
-
- /*
- * Get mapping parameters for each mapping.
- */
- for (i = 0; i < (int)num_map; i++) {
- printf(" Mapping %d \n", i);
- printf(" Selection in the virtual dataset \n");
- /* Get selection in the virtual dataset */
- vspace = H5Pget_virtual_vspace(dcpl, (size_t)i);
- if (H5Sget_select_type(vspace) == H5S_SEL_HYPERSLABS) {
- if (H5Sis_regular_hyperslab(vspace)) {
- status = H5Sget_regular_hyperslab(vspace, start_out, stride_out, count_out, block_out);
- printf(" start = [%llu, %llu, %llu] \n", (unsigned long long)start_out[0],
- (unsigned long long)start_out[1], (unsigned long long)start_out[2]);
- printf(" stride = [%llu, %llu, %llu] \n", (unsigned long long)stride_out[0],
- (unsigned long long)stride_out[1], (unsigned long long)stride_out[2]);
- printf(" count = [%llu, %llu, %llu] \n", (unsigned long long)count_out[0],
- (unsigned long long)count_out[1], (unsigned long long)count_out[2]);
- printf(" block = [%llu, %llu, %llu] \n", (unsigned long long)block_out[0],
- (unsigned long long)block_out[1], (unsigned long long)block_out[2]);
- }
- }
- /* Get source file name */
- len = H5Pget_virtual_filename(dcpl, (size_t)i, NULL, 0);
- filename = (char *)malloc((size_t)len * sizeof(char) + 1);
- H5Pget_virtual_filename(dcpl, (size_t)i, filename, len + 1);
- printf(" Source filename %s\n", filename);
-
- /* Get source dataset name */
- len = H5Pget_virtual_dsetname(dcpl, (size_t)i, NULL, 0);
- dsetname = (char *)malloc((size_t)len * sizeof(char) + 1);
- H5Pget_virtual_dsetname(dcpl, (size_t)i, dsetname, len + 1);
- printf(" Source dataset name %s\n", dsetname);
-
- /* Get selection in the source dataset */
- printf(" Selection in the source dataset \n");
- src_space = H5Pget_virtual_srcspace(dcpl, (size_t)i);
- if (H5Sget_select_type(src_space) == H5S_SEL_HYPERSLABS) {
- if (H5Sis_regular_hyperslab(src_space)) {
- status = H5Sget_regular_hyperslab(src_space, start_out, stride_out, count_out, block_out);
- printf(" start = [%llu, %llu, %llu] \n", (unsigned long long)start_out[0],
- (unsigned long long)start_out[1], (unsigned long long)start_out[2]);
- printf(" stride = [%llu, %llu, %llu] \n", (unsigned long long)stride_out[0],
- (unsigned long long)stride_out[1], (unsigned long long)stride_out[2]);
- printf(" count = [%llu, %llu, %llu] \n", (unsigned long long)count_out[0],
- (unsigned long long)count_out[1], (unsigned long long)count_out[2]);
- printf(" block = [%llu, %llu, %llu] \n", (unsigned long long)block_out[0],
- (unsigned long long)block_out[1], (unsigned long long)block_out[2]);
- }
- }
- H5Sclose(vspace);
- H5Sclose(src_space);
- free(filename);
- free(dsetname);
- }
- /*
- * Close and release resources.
- */
- status = H5Pclose(dcpl);
- status = H5Dclose(dset);
- status = H5Fclose(file);
- return 0;
-}