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/*
* Copyright (C) 1998 Spizella Software
* All rights reserved.
*
* Programmer: Robb Matzke <matzke@llnl.gov>
* Friday, January 30, 1998
*
* Purpose: Tests extendible datasets.
*/
#include <assert.h>
#include <hdf5.h>
#define NX 100 /* USE AN EVEN NUMBER!*/
#define NY 100 /* USE AN EVEN NUMBER!*/
/*-------------------------------------------------------------------------
* Function: main
*
* Purpose: Tests extendible datasets
*
* Return: Success: exit(0)
*
* Failure: exit(non-zero)
*
* Programmer: Robb Matzke
* Friday, January 30, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
int
main (void)
{
hid_t file, dataset, mem_space, file_space, cparms;
herr_t status;
int i, j, k, m;
static int buf1[NY][NX], buf2[NX/2][NY/2];
static const size_t dims[2] = {NX, NY};
static const size_t half_dims[2] = {NX/2, NY/2};
static const size_t chunk_dims[2] = {NX/2, NY/2};
static size_t maxdims[2] = {H5S_UNLIMITED, H5S_UNLIMITED};
static size_t size[2];
int offset[2];
/* Initialize buffer and space */
for (i=0; i<NX; i++) {
for (j=0; j<NY; j++) {
buf1[i][j] = i*NY+j;
}
}
mem_space = H5Screate_simple (2, dims, maxdims);
assert (mem_space>=0);
/* Create the file */
file = H5Fcreate ("extend.h5", H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
assert (file>=0);
/* Create the dataset which is originally NX by NY */
cparms = H5Pcreate (H5P_DATASET_CREATE);
assert (cparms>=0);
status = H5Pset_chunk (cparms, 2, chunk_dims);
assert (status>=0);
dataset = H5Dcreate (file, "dataset", H5T_NATIVE_INT, mem_space, cparms);
assert (dataset>=0);
/* Write the data */
for (i=0; i<5; i++) {
for (j=0; j<5; j++) {
/* Extend the dataset */
offset[0] = i * NX;
offset[1] = j * NY;
size[0] = offset[0] + NX;
size[1] = offset[1] + NY;
status = H5Dextend (dataset, size);
assert (status>=0);
/* Select a hyperslab */
file_space = H5Dget_space (dataset);
assert (file_space>=0);
status = H5Sset_hyperslab (file_space, offset, dims, NULL);
assert (status>=0);
/* Write to the hyperslab */
status = H5Dwrite (dataset, H5T_NATIVE_INT, mem_space, file_space,
H5P_DEFAULT, buf1);
assert (status>=0);
H5Sclose (file_space);
}
}
H5Sclose (mem_space);
/* Read the data */
mem_space = H5Screate_simple (2, half_dims, NULL);
file_space = H5Dget_space (dataset);
for (i=0; i<10; i++) {
for (j=0; j<10; j++) {
/* Select a hyperslab */
offset[0] = i * NX/2;
offset[1] = j * NY/2;
assert (file_space>=0);
status = H5Sset_hyperslab (file_space, offset, half_dims, NULL);
assert (status>=0);
/* Read */
status = H5Dread (dataset, H5T_NATIVE_INT, mem_space, file_space,
H5P_DEFAULT, buf2);
assert (status>=0);
/* Compare */
for (k=0; k<NX/2; k++) {
for (m=0; m<NY/2; m++) {
assert (buf2[k][m]==buf1[(i%2)*NX/2+k][(j%2)*NY/2+m]);
}
}
}
}
H5Dclose (dataset);
H5Fclose (file);
return 0;
}
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