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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 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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* writer HDF5 API module of the trecover test program.
*
* Creator: Albert Cheng, Jan 28, 2008.
*/
#include "trecover.h"
#define H5FILE_NAME "SDS.h5"
#define DATASETNAME "IntArray"
#define ZDATASETNAME "IntArrayZCompressed"
#define SZDATASETNAME "IntArraySZCompressed"
/* Dataset dimensions. Intentional small for easier dumping of data. */
#define RANK 2
#define NX 8000 /* dataset dimensions */
#define NY 16
#define ChunkX 8 /* Dataset chunk sizes */
#define ChunkY 8
void
writer(void)
{
hid_t file, dataset; /* file and dataset handles */
hid_t datatype, dataspace, plist; /* handles */
hsize_t dims[RANK]={NX,NY}; /* dataset dimensions */
hsize_t dimschunk[RANK]={ChunkX,ChunkY}; /* dataset chunk dimensions */
herr_t status;
int data[NX][NY]; /* data to write */
int i, j;
/*
* Data and output buffer initialization.
*/
for (i = 0; i < NX; i++) {
for (j = 0; j < NY; j++)
data[i][j] = i*100 + j;
}
/*
* 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.
*/
dataspace = H5Screate_simple(RANK, dims, NULL);
/*
* Define datatype for the data in the file.
* We will store little endian INT numbers.
*/
datatype = H5Tcopy(H5T_NATIVE_INT);
status = H5Tset_order(datatype, H5T_ORDER_LE);
/* =============================================================
* Create a new dataset within the file using defined dataspace and
* datatype and default dataset creation properties.
* =============================================================
*/
dataset = H5Dcreate(file, DATASETNAME, datatype, dataspace,
H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
/*
* Write the data to the dataset using default transfer properties.
*/
status = H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL,
H5P_DEFAULT, data);
CRASH;
/*
* Close/release resources.
*/
H5Dclose(dataset);
printf("%s created.\n", DATASETNAME);
#ifdef H5_HAVE_FILTER_DEFLATE
/* =============================================================
* Create similar dataset but using Zlib compression.
* Dataset creation property list is modified to use
* GZIP compression with the compression effort set to 6.
* Note that compression can be used only when dataset is chunked.
* =============================================================
*/
plist = H5Pcreate(H5P_DATASET_CREATE);
H5Pset_chunk(plist, RANK, dimschunk);
H5Pset_deflate( plist, 6);
dataset = H5Dcreate(file, ZDATASETNAME, H5T_NATIVE_INT,
dataspace, plist, H5P_DEFAULT, H5P_DEFAULT);
status = H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL,
H5P_DEFAULT, data);
/*
* Close/release resources.
*/
H5Pclose(plist);
H5Dclose(dataset);
printf("%s created.\n", ZDATASETNAME);
#else
printf("%s is not created because of no GZIP (deflate) support.\n",
ZDATASETNAME);
#endif
#ifdef H5_HAVE_FILTER_SZIP
/* =============================================================
* Create similar dataset but using SZLIB compression.
* Dataset creation property list is modified to use
* SZIP compression with 8 pixels_per_block.
* Note that compression can be used only when dataset is chunked.
* =============================================================
*/
plist = H5Pcreate(H5P_DATASET_CREATE);
H5Pset_chunk(plist, RANK, dimschunk);
H5Pset_szip (plist, H5_SZIP_NN_OPTION_MASK, 8);
dataset = H5Dcreate(file, SZDATASETNAME, H5T_NATIVE_INT,
dataspace, plist, H5P_DEFAULT, H5P_DEFAULT);
status = H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL,
H5P_DEFAULT, data);
/*
* Close/release resources.
*/
H5Pclose(plist);
H5Dclose(dataset);
printf("%s created.\n", SZDATASETNAME);
#else
printf("%s is not created because of no SZIP encode support.\n",
SZDATASETNAME);
#endif
/*
* Close/release resources.
*/
H5Sclose(dataspace);
H5Tclose(datatype);
/* Close the file */
H5Fclose(file);
printf("HDF5 C Sample program ran successfully. File %s generated.\n", H5FILE_NAME);
return;
}
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