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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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 files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Programmer: Raymond Lu <slu@ncsa.uiuc.edu>
* Thursday, March 23, 2006
*
* This program writes floating-point data to the HDF5 file. It generates
* the file to be read by cross_read.c, to test reading data from cross-systems.
* Run it on an OpenVMS, a little-endian, and a big-endian machine. Change the
* output file names to vms_data.h5, le_data.h5, and be_data.h5, and put them
* under hdf5/test/ directory.
*/
#include "h5test.h"
#define H5FILE_NAME "data.h5"
#define DATASETNAME "Array"
#define DATASETNAME2 "Scale_offset_data"
#define NX 6
#define NY 6
#define RANK 2
#define CHUNK0 3
#define CHUNK1 3
int create_normal_dset(hid_t fid, hid_t sid, hid_t tid);
int create_scale_offset_dset(hid_t fid, hid_t sid, hid_t tid);
/*-------------------------------------------------------------------------
* Function: create_normal_dset
*
* Purpose: Create a regular dataset of DOUBLE datatype.
*
* Return: Success: 0
* Failure: -1
*
* Programmer: Raymond Lu
* Some time ago
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
int
create_normal_dset(hid_t fid, hid_t sid, hid_t tid)
{
hid_t dataset; /* file and dataset handles */
herr_t status;
float data[NX][NY]; /* data to write */
int i, j;
/*
* Data and output buffer initialization.
*/
for (j = 0; j < NX; j++) {
for (i = 0; i < NY; i++)
data[j][i] = i + j;
}
/*
* 0 1 2 3 4 5
* 1 2 3 4 5 6
* 2 3 4 5 6 7
* 3 4 5 6 7 8
* 4 5 6 7 8 9
* 5 6 7 8 9 10
*/
/*
* Create a new dataset within the file using defined dataspace and
* datatype and default dataset creation properties.
*/
dataset = H5Dcreate2(fid, DATASETNAME, tid, sid,
H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
/*
* Write the data to the dataset using default transfer properties.
*/
status = H5Dwrite(dataset, H5T_NATIVE_FLOAT, H5S_ALL, H5S_ALL,
H5P_DEFAULT, data);
/*
* Close/release resources.
*/
H5Dclose(dataset);
return 0;
}
/*-------------------------------------------------------------------------
* Function: create_scale_offset_dset
*
* Purpose: Create a dataset of DOUBLE datatype with scale-offset filter
*
* Return: Success: 0
* Failure: -1
*
* Programmer: Raymond Lu
* 21 January 2011
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
int
create_scale_offset_dset(hid_t fid, hid_t sid, hid_t tid)
{
#ifdef H5_HAVE_FILTER_SCALEOFFSET
hid_t dataset; /* file and dataset handles */
hid_t dcpl;
herr_t status;
float data[NX][NY]; /* data to write */
hsize_t chunk[RANK] = {CHUNK0, CHUNK1};
int i, j;
/*
* Data and output buffer initialization.
*/
for (j = 0; j < NX; j++) {
for (i = 0; i < NY; i++)
data[j][i] = ((float)(i + j + 1))/3;
}
/*
* Create the dataset creation property list, add the Scale-Offset
* filter and set the chunk size.
*/
dcpl = H5Pcreate (H5P_DATASET_CREATE);
status = H5Pset_scaleoffset (dcpl, H5Z_SO_FLOAT_DSCALE, 3);
status = H5Pset_chunk (dcpl, RANK, chunk);
/*
* Create a new dataset within the file using defined dataspace and
* datatype and default dataset creation properties.
*/
dataset = H5Dcreate2(fid, DATASETNAME2, tid, sid,
H5P_DEFAULT, dcpl, H5P_DEFAULT);
/*
* Write the data to the dataset using default transfer properties.
*/
status = H5Dwrite(dataset, H5T_NATIVE_FLOAT, H5S_ALL, H5S_ALL,
H5P_DEFAULT, data);
/*
* Close/release resources.
*/
H5Pclose(dcpl);
H5Dclose(dataset);
#else /* H5_HAVE_FILTER_SCALEOFFSET */
const char *not_supported= "Scaleoffset filter is not enabled. Can't create the dataset.";
puts(not_supported);
#endif /* H5_HAVE_FILTER_SCALEOFFSET */
return 0;
}
/*-------------------------------------------------------------------------
* Function: main
*
* Purpose: Create a file for cross_read.c test.
*
* Return: Success: exit(0)
* Failure: exit(1)
*
* Programmer: Raymond Lu
* Some time ago
*
*-------------------------------------------------------------------------
*/
int
main (void)
{
hid_t file; /* file and dataset handles */
hid_t dataspace, datatype;
hsize_t dimsf[RANK];
/*
* Create a new file using H5F_ACC_TRUNC access,
* default file creation properties, and default file
* access properties.
*/
file = H5Fcreate(H5FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
/*
* Describe the size of the array and create the data space for fixed
* size dataset.
*/
dimsf[0] = NX;
dimsf[1] = NY;
dataspace = H5Screate_simple(RANK, dimsf, NULL);
/*
* Define datatype for the data in the file.
* We will store little endian INT numbers.
*/
datatype = H5Tcopy(H5T_NATIVE_DOUBLE);
/* Create a regular dataset */
create_normal_dset(file, dataspace, datatype);
/* Create a dataset with scale-offset filter */
create_scale_offset_dset(file, dataspace, datatype);
/*
* Close/release resources.
*/
H5Sclose(dataspace);
H5Tclose(datatype);
H5Fclose(file);
return 0;
}
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