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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_fields_index
*
*-------------------------------------------------------------------------
*/
#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;
/* Calculate the type_size and the offsets of our struct members */
Particle dst_buf[NRECORDS];
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)};
/* Initially no data */
Particle *p_data = NULL;
/* Define field information */
const char *field_names[NFIELDS] = {"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 */
int compress = 0;
hsize_t nfields;
hsize_t start; /* Record to start reading/writing */
hsize_t nrecords; /* Number of records to read/write */
int i;
/* Define new values for the field "Pressure" */
float pressure_in[NRECORDS_ADD] = {0.0f, 1.0f, 2.0f};
int field_index_pre[1] = {3};
int field_index_pos[2] = {1, 2};
/* Define new values for the fields "Latitude,Longitude" */
Position position_in[NRECORDS_ADD] = {{0, 0}, {10, 10}, {20, 20}};
size_t field_sizes_pos[2] = {sizeof(position_in[0].longi), sizeof(position_in[0].lati)};
size_t field_sizes_pre[1] = {sizeof(float)};
/* 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_05.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 */
nfields = 1;
start = 2;
nrecords = NRECORDS_ADD;
H5TBwrite_fields_index(file_id, TABLE_NAME, nfields, field_index_pre, start, nrecords, sizeof(float), 0,
field_sizes_pre, pressure_in);
/* Write the new longitude and latitude information starting at record 2 */
nfields = 2;
start = 2;
nrecords = NRECORDS_ADD;
H5TBwrite_fields_index(file_id, TABLE_NAME, nfields, field_index_pos, 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");
}
/* close type */
H5Tclose(string_type);
/* close the file */
H5Fclose(file_id);
return 0;
}
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