mirror of
https://github.com/HDFGroup/hdf5.git
synced 2024-11-27 02:10:55 +08:00
89fbe00dec
* commit '54957d37f5aa73912763dbb6e308555e863c43f4': Commit copyright header change for src/H5PLpkg.c which was added after running script to make changes. Add new files in release_docs to MANIFEST. Cimmit changes to Makefile.in(s) and H5PL.c that resulted from running autogen.sh. Merge pull request #407 in HDFFV/hdf5 from ~LRKNOX/hdf5_lrk:hdf5_1_10_1 to hdf5_1_10_1 Change copyright headers to replace url referring to file to be removed and replace it with new url for COPYING file.
234 lines
8.4 KiB
C
234 lines
8.4 KiB
C
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
|
* 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://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 example illustrates the concept of the virtual dataset.
|
|
Excalibur use case with k=2 and m=3 and only 3 planes in
|
|
Z-direction (i.e., not unlimited).
|
|
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-exclim.h5"
|
|
#define DATASET "VDS-Excaliburlim"
|
|
#define VDSDIM0 3
|
|
#define VDSDIM1 15
|
|
#define VDSDIM2 6
|
|
#define KDIM0 3
|
|
#define KDIM1 2
|
|
#define KDIM2 6
|
|
#define NDIM0 3
|
|
#define NDIM1 3
|
|
#define NDIM2 6
|
|
#define RANK 3
|
|
|
|
const char *SRC_FILE[] = {
|
|
"a.h5",
|
|
"b.h5",
|
|
"c.h5",
|
|
"d.h5",
|
|
"e.h5",
|
|
"f.h5"
|
|
};
|
|
|
|
const char *SRC_DATASET[] = {
|
|
"A",
|
|
"B",
|
|
"C",
|
|
"D",
|
|
"E",
|
|
"F"
|
|
};
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
hid_t file, space, ksrc_space, nsrc_space, vspace,
|
|
src_space,
|
|
dset; /* Handles */
|
|
hid_t dcpl;
|
|
herr_t status;
|
|
hsize_t vdsdims[3] = {VDSDIM0, VDSDIM1, VDSDIM2},
|
|
kdims[3] = {KDIM0, KDIM1, KDIM2},
|
|
ndims[3] = {NDIM0, NDIM1, NDIM2},
|
|
start[3], /* Hyperslab parameters */
|
|
stride[3],
|
|
count[3],
|
|
block[3];
|
|
hsize_t start_out[3],
|
|
stride_out[3],
|
|
count_out[3],
|
|
block_out[3];
|
|
int k = 2;
|
|
int n = 3;
|
|
int i;
|
|
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;
|
|
|
|
|
|
file = H5Fcreate (FILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
|
|
|
|
/* Create VDS dataspace. */
|
|
space = H5Screate_simple (RANK, vdsdims, NULL);
|
|
/* Create dataspaces for A, C, and E datasets. */
|
|
ksrc_space = H5Screate_simple (RANK, kdims, NULL);
|
|
/* Create dataspaces for B, D, and F datasets. */
|
|
nsrc_space = H5Screate_simple (RANK, ndims, NULL);
|
|
|
|
/* Create VDS creation property */
|
|
dcpl = H5Pcreate (H5P_DATASET_CREATE);
|
|
|
|
/* Initialize hyperslab values */
|
|
|
|
start[0] = 0;
|
|
start[1] = 0;
|
|
start[2] = 0;
|
|
count[0] = VDSDIM0;
|
|
count[1] = 1;
|
|
count[2] = 1;
|
|
block[0] = 1;
|
|
block[1] = k;
|
|
block[2] = VDSDIM2;
|
|
|
|
/*
|
|
* Build the mappings for A, C and E source datasets.
|
|
*
|
|
*/
|
|
status = H5Sselect_hyperslab (ksrc_space, H5S_SELECT_SET, start, NULL, count, block);
|
|
for (i = 0; i < 3; i++) {
|
|
start[1] = (hsize_t)((k+n)*i);
|
|
status = H5Sselect_hyperslab (space, H5S_SELECT_SET, start, NULL, count, block);
|
|
status = H5Pset_virtual (dcpl, space, SRC_FILE[2*i], SRC_DATASET[2*i], ksrc_space);
|
|
}
|
|
|
|
/* Reinitialize start[0] and block[1] */
|
|
start[0] = 0;
|
|
block[1] = n;
|
|
/*
|
|
* Build the mappings for B, D and F source datasets.
|
|
*
|
|
*/
|
|
status = H5Sselect_hyperslab (nsrc_space, H5S_SELECT_SET, start, NULL, count, block);
|
|
for (i = 0; i < 3; i++) {
|
|
start[1] = (hsize_t)(k+(k+n)*i);
|
|
status = H5Sselect_hyperslab (space, H5S_SELECT_SET, start, NULL, count, block);
|
|
status = H5Pset_virtual (dcpl, space, SRC_FILE[2*i+1], SRC_DATASET[2*i+1], nsrc_space);
|
|
}
|
|
|
|
/* Create a virtual dataset */
|
|
dset = H5Dcreate2 (file, DATASET, H5T_NATIVE_INT, space, H5P_DEFAULT,
|
|
dcpl, H5P_DEFAULT);
|
|
status = H5Sclose (space);
|
|
status = H5Sclose (nsrc_space);
|
|
status = H5Sclose (ksrc_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 virttual 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(vspace)) {
|
|
status = H5Sget_regular_hyperslab (vspace, start_out, stride_out, count_out, block_out);
|
|
printf(" start = [%d, %d, %d] \n", (int)start_out[0], (int)start_out[1], (int)start_out[2]);
|
|
printf(" stride = [%d, %d, %d] \n", (int)stride_out[0], (int)stride_out[1], (int)stride_out[2]);
|
|
printf(" count = [%d, %d, %d] \n", (int)count_out[0], (int)count_out[1], (int)count_out[2]);
|
|
printf(" block = [%d, %d, %d] \n", (int)block_out[0], (int)block_out[1], (int)block_out[2]);
|
|
}
|
|
}
|
|
H5Sclose(vspace);
|
|
H5Sclose(src_space);
|
|
free(filename);
|
|
free(dsetname);
|
|
}
|
|
/* EIP read data back */
|
|
|
|
/*
|
|
* Close and release resources.
|
|
*/
|
|
status = H5Pclose (dcpl);
|
|
status = H5Dclose (dset);
|
|
status = H5Fclose (file);
|
|
|
|
return 0;
|
|
}
|
|
|