1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
2 * Copyright by The HDF Group. *
3 * Copyright by the Board of Trustees of the University of Illinois. *
4 * All rights reserved. *
5 * *
6 * This file is part of HDF5. The full HDF5 copyright notice, including *
7 * terms governing use, modification, and redistribution, is contained in *
8 * the COPYING file, which can be found at the root of the source code *
9 * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
10 * If you do not have access to either file, you may request a copy from *
11 * help@hdfgroup.org. *
12 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
13
14 #include "hdf5.h"
15 #include "hdf5_hl.h"
16 #include <stdlib.h>
17
18 /*-------------------------------------------------------------------------
19 * Table API example
20 *
21 * H5TBwrite_fields_name
22 *
23 *-------------------------------------------------------------------------
24 */
25
26 #define NFIELDS (hsize_t) 5
27 #define NRECORDS (hsize_t) 8
28 #define NRECORDS_ADD (hsize_t) 3
29 #define TABLE_NAME "table"
30
main(void)31 int main( void )
32 {
33 typedef struct Particle
34 {
35 char name[16];
36 int lati;
37 int longi;
38 float pressure;
39 double temperature;
40 } Particle;
41
42 /* Define a subset of Particle, with latitude and longitude fields */
43 typedef struct Position
44 {
45 int lati;
46 int longi;
47 } Position;
48
49 /* Define a subset of Particle, with name and pressure fields */
50 typedef struct NamePressure
51 {
52 char name[16];
53 float pressure;
54 } NamePressure;
55
56 Particle dst_buf[NRECORDS];
57 /* Calculate the size and the offsets of our struct members in memory */
58 size_t dst_size = sizeof( Particle );
59 size_t dst_offset[NFIELDS] = { HOFFSET( Particle, name ),
60 HOFFSET( Particle, lati ),
61 HOFFSET( Particle, longi ),
62 HOFFSET( Particle, pressure ),
63 HOFFSET( Particle, temperature )};
64 size_t dst_sizes[NFIELDS] = { sizeof( dst_buf[0].name),
65 sizeof( dst_buf[0].lati),
66 sizeof( dst_buf[0].longi),
67 sizeof( dst_buf[0].pressure),
68 sizeof( dst_buf[0].temperature)};
69 size_t field_offset_pos[2] = { HOFFSET( Position, lati ),
70 HOFFSET( Position, longi )};
71 const char *field_names[NFIELDS] = /* Define field information */
72 { "Name","Latitude", "Longitude", "Pressure", "Temperature" };
73 hid_t field_type[NFIELDS];
74 hid_t string_type;
75 hid_t file_id;
76 hsize_t chunk_size = 10;
77 Particle fill_data[1] =
78 { {"no data",-1,-1, -99.0f, -99.0} }; /* Fill value particle */
79 hsize_t start; /* Record to start reading/writing */
80 hsize_t nrecords; /* Number of records to read/write */
81 int compress = 0;
82 int i;
83 Particle *p_data = NULL; /* Initially no data */
84 float pressure_in [NRECORDS_ADD] = /* Define new values for the field "Pressure" */
85 { 0.0f,1.0f,2.0f};
86 Position position_in[NRECORDS_ADD] = {/* Define new values for "Latitude,Longitude" */
87 {0,0},
88 {10,10},
89 {20,20}};
90 NamePressure namepre_in[NRECORDS_ADD] =/* Define new values for "Name,Pressure" */
91 { {"zero",0.0f},
92 {"one", 1.0f},
93 {"two", 2.0f},
94 };
95 size_t field_sizes_pos[2]=
96 {
97 sizeof(position_in[0].longi),
98 sizeof(position_in[0].lati)
99 };
100 size_t field_sizes_pre[1]=
101 {
102 sizeof(namepre_in[0].pressure)
103 };
104
105 /* Initialize the field field_type */
106 string_type = H5Tcopy( H5T_C_S1 );
107 H5Tset_size( string_type, 16 );
108 field_type[0] = string_type;
109 field_type[1] = H5T_NATIVE_INT;
110 field_type[2] = H5T_NATIVE_INT;
111 field_type[3] = H5T_NATIVE_FLOAT;
112 field_type[4] = H5T_NATIVE_DOUBLE;
113
114 /* Create a new file using default properties. */
115 file_id = H5Fcreate( "ex_table_04.h5", H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT );
116
117 /* Make the table */
118 H5TBmake_table( "Table Title",file_id,TABLE_NAME,NFIELDS,NRECORDS,
119 dst_size,field_names, dst_offset, field_type,
120 chunk_size, fill_data, compress, p_data );
121
122 /* Write the pressure field starting at record 2 */
123 start = 2;
124 nrecords = NRECORDS_ADD;
125 H5TBwrite_fields_name( file_id, TABLE_NAME, "Pressure", start, nrecords,
126 sizeof( float ), 0, field_sizes_pre, pressure_in );
127
128 /* Write the new longitude and latitude information starting at record 2 */
129 start = 2;
130 nrecords = NRECORDS_ADD;
131 H5TBwrite_fields_name( file_id, TABLE_NAME, "Latitude,Longitude", start, nrecords,
132 sizeof( Position ), field_offset_pos, field_sizes_pos, position_in );
133
134 /* read the table */
135 H5TBread_table( file_id, TABLE_NAME, dst_size, dst_offset, dst_sizes, dst_buf );
136
137 /* print it by rows */
138 for (i=0; i<NRECORDS; i++) {
139 printf ("%-5s %-5d %-5d %-5f %-5f",
140 dst_buf[i].name,
141 dst_buf[i].lati,
142 dst_buf[i].longi,
143 dst_buf[i].pressure,
144 dst_buf[i].temperature);
145 printf ("\n");
146 }
147
148 /*-------------------------------------------------------------------------
149 * end
150 *-------------------------------------------------------------------------
151 */
152
153 /* close type */
154 H5Tclose( string_type );
155
156 /* close the file */
157 H5Fclose( file_id );
158
159 return 0;
160
161
162 }
163
164