mirror of https://gitee.com/openkylin/hdf5.git
110 lines
3.4 KiB
C
110 lines
3.4 KiB
C
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by The HDF Group. *
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* Copyright by the Board of Trustees of the University of Illinois. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the COPYING file, which can be found at the root of the source code *
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* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
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* If you do not have access to either file, you may request a copy from *
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* help@hdfgroup.org. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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#include "hdf5.h"
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#include "hdf5_hl.h"
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#include <stdlib.h>
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/*-------------------------------------------------------------------------
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* Table API example
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*
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* H5TBdelete_field
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*
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*-------------------------------------------------------------------------
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*/
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#define NFIELDS (hsize_t) 5
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#define NRECORDS (hsize_t) 8
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#define TABLE_NAME "table"
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int main( void )
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{
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typedef struct Particle
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{
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char name[16];
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int lati;
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int longi;
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float pressure;
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double temperature;
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} Particle;
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/* Calculate the size and the offsets of our struct members in memory */
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size_t dst_size = sizeof( Particle );
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size_t dst_offset[NFIELDS] = { HOFFSET( Particle, name ),
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HOFFSET( Particle, lati ),
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HOFFSET( Particle, longi ),
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HOFFSET( Particle, pressure ),
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HOFFSET( Particle, temperature )};
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/* Define an array of Particles */
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Particle p_data[NRECORDS] = {
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{"zero",0,0, 0.0f, 0.0},
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{"one",10,10, 1.0f, 10.0},
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{"two", 20,20, 2.0f, 20.0},
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{"three",30,30, 3.0f, 30.0},
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{"four", 40,40, 4.0f, 40.0},
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{"five", 50,50, 5.0f, 50.0},
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{"six", 60,60, 6.0f, 60.0},
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{"seven",70,70, 7.0f, 70.0}
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};
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/* Define field information */
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const char *field_names[NFIELDS] =
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{ "Name","Latitude", "Longitude", "Pressure", "Temperature" };
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hid_t field_type[NFIELDS];
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hid_t string_type;
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hid_t file_id;
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hsize_t chunk_size = 10;
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int compress = 0;
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Particle fill_data[1] =
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{ {"no data",-1,-1, -99.0f, -99.0} };
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hsize_t nfields_out;
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hsize_t nrecords_out;
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/* Initialize the field type */
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string_type = H5Tcopy( H5T_C_S1 );
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H5Tset_size( string_type, 16 );
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field_type[0] = string_type;
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field_type[1] = H5T_NATIVE_INT;
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field_type[2] = H5T_NATIVE_INT;
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field_type[3] = H5T_NATIVE_FLOAT;
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field_type[4] = H5T_NATIVE_DOUBLE;
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/* Create a new file using default properties. */
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file_id = H5Fcreate( "ex_table_12.h5", H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT );
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/* Make a table */
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H5TBmake_table( "Table Title", file_id, TABLE_NAME, NFIELDS, NRECORDS, dst_size,
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field_names, dst_offset, field_type,
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chunk_size, fill_data, compress, p_data );
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/* Delete the field */
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H5TBdelete_field( file_id, TABLE_NAME, "Pressure" );
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/* Get table info */
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H5TBget_table_info (file_id,TABLE_NAME, &nfields_out, &nrecords_out );
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/* print */
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printf ("Table has %d fields and %d records\n",(int)nfields_out,(int)nrecords_out);
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/* close type */
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H5Tclose( string_type );
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/* close the file */
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H5Fclose( file_id );
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return 0;
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}
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