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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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