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Diffstat (limited to 'hl/examples/ex_table_03.c')
-rw-r--r-- | hl/examples/ex_table_03.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/hl/examples/ex_table_03.c b/hl/examples/ex_table_03.c new file mode 100644 index 0000000..fbe66a1 --- /dev/null +++ b/hl/examples/ex_table_03.c @@ -0,0 +1,134 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * 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 + * + * H5TBwrite_records + * + *------------------------------------------------------------------------- + */ + +#define NFIELDS (hsize_t) 5 +#define NRECORDS (hsize_t) 8 +#define NRECORDS_WRITE (hsize_t) 2 +#define TABLE_NAME "table" + +int main( void ) +{ + typedef struct Particle + { + char name[16]; + int lati; + int longi; + float pressure; + double temperature; + } Particle; + + Particle dst_buf[NRECORDS]; + + /* 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 )}; + + Particle p = {"zero",0,0, 0.0f, 0.0}; + size_t dst_sizes[NFIELDS] = { sizeof( p.name), + sizeof( p.lati), + sizeof( p.longi), + sizeof( p.pressure), + sizeof( p.temperature)}; + + /* Define field information */ + const char *field_names[NFIELDS] = + { "Name","Latitude", "Longitude", "Pressure", "Temperature" }; + /* Fill value particle */ + Particle fill_data[1] = + { {"no data",-1,-1, -99.0f, -99.0} }; + hid_t field_type[NFIELDS]; + hid_t string_type; + hid_t file_id; + hsize_t chunk_size = 10; + hsize_t start; /* Record to start reading/writing */ + hsize_t nrecords; /* Number of records to read/write */ + herr_t status; + int i; + + /* Define 2 new particles to write */ + Particle particle_in[NRECORDS_WRITE] = + { {"zero",0,0, 0.0f, 0.0}, + {"one",10,10, 1.0f, 10.0} }; + + /* 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_03.h5", H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT ); + + /* Make the table */ + status=H5TBmake_table( "Table Title", + file_id, + TABLE_NAME, + NFIELDS, + NRECORDS, + dst_size, + field_names, + dst_offset, + field_type, + chunk_size, + fill_data, + 0, /* no compression */ + NULL ); /* no data written */ + + + /* Overwrite 2 records starting at record 0 */ + start = 0; + nrecords = NRECORDS_WRITE; + status=H5TBwrite_records( file_id, TABLE_NAME, start, nrecords, dst_size, dst_offset, + dst_sizes, particle_in); + + /* read the table */ + status=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 the file. */ + H5Fclose( file_id ); + + return 0; + +} + |