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Diffstat (limited to 'hl/examples/ex_table_09.c')
| -rw-r--r-- | hl/examples/ex_table_09.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/hl/examples/ex_table_09.c b/hl/examples/ex_table_09.c new file mode 100644 index 0000000..164f6aa --- /dev/null +++ b/hl/examples/ex_table_09.c @@ -0,0 +1,141 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * 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 files COPYING and Copyright.html. COPYING can be found at the root * + * of the source code distribution tree; Copyright.html can be found at the * + * root level of an installed copy of the electronic HDF5 document set and * + * is linked from the top-level documents page. It can also be found at * + * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have * + * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +#include "H5TB.h" +#include <stdlib.h> + +/*------------------------------------------------------------------------- + * Table API example + * + * H5TBadd_records_from + * + *------------------------------------------------------------------------- + */ + +#define NFIELDS (hsize_t) 5 +#define NRECORDS (hsize_t) 8 +#define NRECORDS_INS (hsize_t) 2 +#define TABLE1_NAME "table1" +#define TABLE2_NAME "table2" + +int main( void ) +{ + typedef struct Particle + { + char name[16]; + int lati; + int longi; + float pressure; + double temperature; + } Particle; + + Particle dst_buf[ NRECORDS + NRECORDS_INS ]; + + /* 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)}; + + /* Define an array of Particles */ + Particle p_data[NRECORDS] = { + {"zero",0,0, 0.0f, 0.0}, + {"one",10,10, 1.0f, 10.0}, + {"two", 20,20, 2.0f, 20.0}, + {"three",30,30, 3.0f, 30.0}, + {"four", 40,40, 4.0f, 40.0}, + {"five", 50,50, 5.0f, 50.0}, + {"six", 60,60, 6.0f, 60.0}, + {"seven",70,70, 7.0f, 70.0} + }; + + /* 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; + int compress = 0; + Particle fill_data[1] = + { {"no data",-1,-1, -99.0f, -99.0} }; /* Fill value particle */ + hsize_t start1; /* Record to start reading from 1st table */ + hsize_t nrecords; /* Number of records to insert */ + hsize_t start2; /* Record to start writing in 2nd table */ + herr_t status; + int i; + hsize_t nfields_out; + hsize_t nrecords_out; + + /* 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_09.h5", H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT ); + + /* Make 2 tables: TABLE2_NAME is empty */ + status=H5TBmake_table( "Table Title",file_id,TABLE1_NAME,NFIELDS,NRECORDS, + dst_size,field_names, dst_offset, field_type, + chunk_size, fill_data, compress, p_data ); + + status=H5TBmake_table( "Table Title",file_id,TABLE2_NAME,NFIELDS,NRECORDS, + dst_size,field_names, dst_offset, field_type, + chunk_size, fill_data, compress, NULL ); + + + /* Add 2 records from TABLE1_NAME to TABLE2_NAME */ + start1 = 3; + nrecords = NRECORDS_INS; + start2 = 6; + status=H5TBadd_records_from( file_id, TABLE1_NAME, start1, nrecords, TABLE2_NAME, start2 ); + + /* read TABLE2_NAME: it should have 2 more records now */ + status=H5TBread_table( file_id, TABLE2_NAME, dst_size, dst_offset, dst_sizes, dst_buf ); + + /* Get table info */ + status=H5TBget_table_info (file_id,TABLE2_NAME, &nfields_out, &nrecords_out ); + + /* print */ + printf ("Table has %d fields and %d records\n",(int)nfields_out,(int)nrecords_out); + + /* print it by rows */ + for (i=0; i<nrecords_out; 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 the file. */ + H5Fclose( file_id ); + + return 0; +} + |