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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://www.hdfgroup.org/licenses. *
* 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_fields_name
*
*-------------------------------------------------------------------------
*/
#define NFIELDS (hsize_t)5
#define NRECORDS (hsize_t)8
#define NRECORDS_ADD (hsize_t)3
#define TABLE_NAME "table"
int
main(void)
{
typedef struct Particle {
char name[16];
int lati;
int longi;
float pressure;
double temperature;
} Particle;
/* Define a subset of Particle, with latitude and longitude fields */
typedef struct Position {
int lati;
int longi;
} Position;
/* Define a subset of Particle, with name and pressure fields */
typedef struct NamePressure {
char name[16];
float pressure;
} NamePressure;
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)};
size_t dst_sizes[NFIELDS] = {sizeof(dst_buf[0].name), sizeof(dst_buf[0].lati), sizeof(dst_buf[0].longi),
sizeof(dst_buf[0].pressure), sizeof(dst_buf[0].temperature)};
size_t field_offset_pos[2] = {HOFFSET(Position, lati), HOFFSET(Position, longi)};
const char *field_names[NFIELDS] = /* Define field information */
{"Name", "Latitude", "Longitude", "Pressure", "Temperature"};
hid_t field_type[NFIELDS];
hid_t string_type;
hid_t file_id;
hsize_t chunk_size = 10;
Particle fill_data[1] = {{"no data", -1, -1, -99.0f, -99.0}}; /* Fill value particle */
hsize_t start; /* Record to start reading/writing */
hsize_t nrecords; /* Number of records to read/write */
int compress = 0;
int i;
Particle *p_data = NULL; /* Initially no data */
float pressure_in[NRECORDS_ADD] = /* Define new values for the field "Pressure" */
{0.0f, 1.0f, 2.0f};
Position position_in[NRECORDS_ADD] = {/* Define new values for "Latitude,Longitude" */
{0, 0},
{10, 10},
{20, 20}};
NamePressure namepre_in[NRECORDS_ADD] = /* Define new values for "Name,Pressure" */
{
{"zero", 0.0f},
{"one", 1.0f},
{"two", 2.0f},
};
size_t field_sizes_pos[2] = {sizeof(position_in[0].longi), sizeof(position_in[0].lati)};
size_t field_sizes_pre[1] = {sizeof(namepre_in[0].pressure)};
/* 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_04.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, compress, p_data);
/* Write the pressure field starting at record 2 */
start = 2;
nrecords = NRECORDS_ADD;
H5TBwrite_fields_name(file_id, TABLE_NAME, "Pressure", start, nrecords, sizeof(float), 0, field_sizes_pre,
pressure_in);
/* Write the new longitude and latitude information starting at record 2 */
start = 2;
nrecords = NRECORDS_ADD;
H5TBwrite_fields_name(file_id, TABLE_NAME, "Latitude,Longitude", start, nrecords, sizeof(Position),
field_offset_pos, field_sizes_pos, position_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");
}
/*-------------------------------------------------------------------------
* end
*-------------------------------------------------------------------------
*/
/* close type */
H5Tclose(string_type);
/* close the file */
H5Fclose(file_id);
return 0;
}
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