#include <H5hut.h>

#define XSIZE		8
#define YSIZE		8
#define ZSIZE		8
#define DATASIZE	XSIZE*YSIZE*ZSIZE

#define VERBOSITY       H5_VERBOSE_DEFAULT
#define FNAME           "example_fields.h5"

int
main (
        int argc,
        char** argv
        ) {
        h5_int64_t verbosity = VERBOSITY;

        h5_float64_t ex[DATASIZE];
        h5_float64_t ey[DATASIZE];
        h5_float64_t ez[DATASIZE];
        h5_float64_t q[DATASIZE];

        // initialize MPI & H5hut
        int comm_rank = 0;
        int comm_size = 1;
        MPI_Init (&argc, &argv);
        MPI_Comm comm = MPI_COMM_WORLD;
        MPI_Comm_rank (comm, &comm_rank);
        MPI_Comm_size (comm, &comm_size);

        H5AbortOnError ();
        H5SetVerbosityLevel (verbosity);

        // open file and go to step#0
        h5_file_t file = H5OpenFile (FNAME, H5_O_RDONLY, H5_PROP_DEFAULT);
        H5SetStep (file, 0);

        H5Block3dSetView (file,
                           comm_rank*XSIZE, (comm_rank+1)*XSIZE - 1,
                           0, YSIZE - 1,
                           0, ZSIZE - 1);
        H5Block3dWriteScalarFieldFloat64(file, "Q", q);
        H5Block3dWriteVector3dFieldFloat64(file, "E", ex, ey, ez);
        H5CloseFile(file);

        MPI_Finalize();
        return H5_SUCCESS;
}