/*
  Copyright (c) 2006-2015, The Regents of the University of California,
  through Lawrence Berkeley National Laboratory (subject to receipt of any
  required approvals from the U.S. Dept. of Energy) and the Paul Scherrer
  Institut (Switzerland).  All rights reserved.

  License: see file COPYING in top level of source distribution.
*/

#include "H5hut.h"
#include "examples.h"

// name of output file
const char* fname = "example_setnparticles.h5";

// H5hut verbosity level
const h5_int64_t h5_verbosity = H5_VERBOSE_DEFAULT;

// number of particles we are going to write per core
const h5_int64_t num_particles = 99;

int
main (
        int argc,
        char* argv[]
        ){

        // initialize MPI & H5hut
        MPI_Init (&argc, &argv);
        MPI_Comm comm = MPI_COMM_WORLD;
        int comm_rank = 0;
        MPI_Comm_rank (comm, &comm_rank);
        H5AbortOnError ();
        H5SetVerbosityLevel (h5_verbosity);

        // open file and create first step
        h5_file_t file = H5OpenFile (fname, H5_O_WRONLY, H5_PROP_DEFAULT);
        H5SetStep (file, 0); 

        // define number of particles this process will write
        H5PartSetNumParticles (file, num_particles);

	// create fake data
        h5_int32_t data[num_particles];
        for (int i = 0; i < num_particles; i++) {
                data[i] = i + num_particles * comm_rank;
        }

        // write data
        H5PartWriteDataInt32 (file, "data", data);

        // done
        H5CloseFile(file);
	MPI_Finalize ();
        return 0;
}