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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 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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include "hdf5.h"
#include "hdf5_hl.h"
#include <stdlib.h>
/*-------------------------------------------------------------------------
* Table API example
*
* H5TBwrite_records
*
*-------------------------------------------------------------------------
*/
#define NFIELDS (hsize_t)5
#define NRECORDS (hsize_t)8
#define NRECORDS_WRITE (hsize_t)2
#define TABLE_NAME "table"
int
main(void)
{
typedef struct Particle {
char name[16];
int lati;
int longi;
float pressure;
double temperature;
} Particle;
Particle dst_buf[NRECORDS];
/* Calculate the size and the offsets of our struct members in memory */
size_t dst_size = sizeof(Particle);
size_t dst_offset[NFIELDS] = {HOFFSET(Particle, name), HOFFSET(Particle, lati), HOFFSET(Particle, longi),
HOFFSET(Particle, pressure), HOFFSET(Particle, temperature)};
Particle p = {"zero", 0, 0, 0.0f, 0.0};
size_t dst_sizes[NFIELDS] = {sizeof(p.name), sizeof(p.lati), sizeof(p.longi), sizeof(p.pressure),
sizeof(p.temperature)};
/* Define field information */
const char *field_names[NFIELDS] = {"Name", "Latitude", "Longitude", "Pressure", "Temperature"};
/* Fill value particle */
Particle fill_data[1] = {{"no data", -1, -1, -99.0f, -99.0}};
hid_t field_type[NFIELDS];
hid_t string_type;
hid_t file_id;
hsize_t chunk_size = 10;
hsize_t start; /* Record to start reading/writing */
hsize_t nrecords; /* Number of records to read/write */
int i;
/* Define 2 new particles to write */
Particle particle_in[NRECORDS_WRITE] = {{"zero", 0, 0, 0.0f, 0.0}, {"one", 10, 10, 1.0f, 10.0}};
/* Initialize the field field_type */
string_type = H5Tcopy(H5T_C_S1);
H5Tset_size(string_type, 16);
field_type[0] = string_type;
field_type[1] = H5T_NATIVE_INT;
field_type[2] = H5T_NATIVE_INT;
field_type[3] = H5T_NATIVE_FLOAT;
field_type[4] = H5T_NATIVE_DOUBLE;
/* Create a new file using default properties. */
file_id = H5Fcreate("ex_table_03.h5", H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
/* Make the table */
H5TBmake_table("Table Title", file_id, TABLE_NAME, NFIELDS, NRECORDS, dst_size, field_names, dst_offset,
field_type, chunk_size, fill_data, 0, /* no compression */
NULL); /* no data written */
/* Overwrite 2 records starting at record 0 */
start = 0;
nrecords = NRECORDS_WRITE;
H5TBwrite_records(file_id, TABLE_NAME, start, nrecords, dst_size, dst_offset, dst_sizes, particle_in);
/* read the table */
H5TBread_table(file_id, TABLE_NAME, dst_size, dst_offset, dst_sizes, dst_buf);
/* print it by rows */
for (i = 0; i < NRECORDS; i++) {
printf("%-5s %-5d %-5d %-5f %-5f", dst_buf[i].name, dst_buf[i].lati, dst_buf[i].longi,
dst_buf[i].pressure, dst_buf[i].temperature);
printf("\n");
}
/* close type */
H5Tclose(string_type);
/* close the file */
H5Fclose(file_id);
return 0;
}
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