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Diffstat (limited to 'hl/examples/ex_table_04.c')
| -rw-r--r-- | hl/examples/ex_table_04.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/hl/examples/ex_table_04.c b/hl/examples/ex_table_04.c new file mode 100644 index 0000000..f31cc40 --- /dev/null +++ b/hl/examples/ex_table_04.c @@ -0,0 +1,177 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * 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_fields_name + * + *------------------------------------------------------------------------- + */ + +#define NFIELDS (hsize_t) 5 +#define NRECORDS (hsize_t) 8 +#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; + + /* Define a subset of Particle, with name and pressure fields */ + typedef struct NamePressure + { + char name[16]; + float pressure; + } NamePressure; + + 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 )}; + 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 )}; + size_t field_offset_namepre[2] = { HOFFSET( NamePressure, name ), + HOFFSET( NamePressure, pressure )}; + const char *field_names[NFIELDS] = /* Define field information */ + { "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 */ + hsize_t start; /* Record to start reading/writing */ + hsize_t nrecords; /* Number of records to read/write */ + int compress = 0; + herr_t status; + int i; + Particle *p_data = NULL; /* Initially no data */ + float pressure_in [NRECORDS] = /* Define new values for the field "Pressure" */ + { 0.0f,1.0f,2.0f,3.0f,4.0f,5.0f,6.0f,7.0f }; + Position position_in[NRECORDS] = { /* Define new values for "Latitude,Longitude" */ + {0,0}, + {10,10}, + {20,20}, + {30,30}, + {40,40}, + {50,50}, + {60,60}, + {70,70} }; + NamePressure namepre_in[NRECORDS] = /* Define new values for "Name,Pressure" */ + { {"zero",0.0f}, + {"one", 1.0f}, + {"two", 2.0f}, + {"three", 3.0f}, + {"four", 4.0f}, + {"five", 5.0f}, + {"six", 6.0f}, + {"seven", 7.0f}, + }; + size_t field_sizes_pos[2]= + { + sizeof(position_in[0].longi), + sizeof(position_in[0].lati) + }; + size_t field_sizes_namepre[2]= + { + sizeof(namepre_in[0].name), + sizeof(namepre_in[0].pressure) + }; + size_t field_sizes_pre[1]= + { + sizeof(namepre_in[0].pressure) + }; + + /* 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_04.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, compress, p_data ); + + /* Write the pressure field starting at record 2 */ + start = 2; + nrecords = 3; + status=H5TBwrite_fields_name( file_id, TABLE_NAME, "Pressure", start, nrecords, + sizeof( float ), 0, field_sizes_pre, pressure_in ); + + /* Write the new longitude and latitude information starting at record 2 */ + start = 2; + nrecords = 3; + status=H5TBwrite_fields_name( file_id, TABLE_NAME, "Latitude,Longitude", start, nrecords, + sizeof( Position ), field_offset_pos, field_sizes_pos, position_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"); + } + +/*------------------------------------------------------------------------- + * end + *------------------------------------------------------------------------- + */ + + /* Close the file. */ + H5Fclose( file_id ); + + return 0; + + +} + |