예제 #1
0
void Attributes::write(H5::H5File f, const cpath & dataset_root)
{
  for(uint i=0;i<attrs.size();i++)
    attrs[i].write(f, dataset_root);
  
  f.flush(H5F_SCOPE_GLOBAL);
}
예제 #2
0
void pyne::Material::write_hdf5(std::string filename, std::string datapath, std::string nucpath, float row, int chunksize)
{
  // Turn off annoying HDF5 errors
  H5::Exception::dontPrint();

  // Create new/open datafile.
  H5::H5File db;
  if (pyne::file_exists(filename))
  {
    bool isH5 = H5::H5File::isHdf5(filename);
    if (!isH5)
      throw h5wrap::FileNotHDF5(filename);
    db = H5::H5File(filename, H5F_ACC_RDWR);
  }
  else
    db = H5::H5File(filename, H5F_ACC_TRUNC);

  //
  // Read in nuclist if available, write it out if not
  //
  bool nucpath_exists = h5wrap::path_exists(&db, nucpath);
  std::vector<int> nuclides;
  int nuc_size;
  hsize_t nuc_dims[1];
  
  if (nucpath_exists)
  {
    nuclides = h5wrap::h5_array_to_cpp_vector_1d<int>(&db, nucpath, H5::PredType::NATIVE_INT);
    nuc_size = nuclides.size();
    nuc_dims[0] = nuc_size;
  }
  else
  {
    nuclides = std::vector<int>();
    for (pyne::comp_iter i = comp.begin(); i != comp.end(); i++)
      nuclides.push_back(i->first);
    nuc_size = nuclides.size();

    // Create the data if it doesn't exist
    int nuc_data [nuc_size];
    for (int n = 0; n != nuc_size; n++)
      nuc_data[n] = nuclides[n];
    nuc_dims[0] = nuc_size;
    H5::DataSpace nuc_space(1, nuc_dims);
    H5::DataSet nuc_set = db.createDataSet(nucpath, H5::PredType::NATIVE_INT, nuc_space);
    nuc_set.write(nuc_data, H5::PredType::NATIVE_INT);
    db.flush(H5F_SCOPE_GLOBAL);
  };



  //
  // Write out to the file
  //
  H5::DataSet data_set;
  H5::DataSpace data_space, data_hyperslab;
  int data_rank = 1;
  hsize_t data_dims[1] = {1};
  hsize_t data_max_dims[1] = {H5S_UNLIMITED};
  hsize_t data_offset[1] = {0};

  size_t material_struct_size = sizeof(pyne::material_struct) + sizeof(double)*(nuc_size);
  H5::CompType data_desc(material_struct_size);
  H5::ArrayType comp_values_array_type (H5::PredType::NATIVE_DOUBLE, 1, nuc_dims);

  // make the data table type
  data_desc.insertMember("name", HOFFSET(pyne::material_struct, name), H5::StrType(0, 20));
  data_desc.insertMember("mass", HOFFSET(pyne::material_struct, mass), H5::PredType::NATIVE_DOUBLE);
  data_desc.insertMember("atoms_per_mol", HOFFSET(pyne::material_struct, atoms_per_mol), H5::PredType::NATIVE_DOUBLE);
  data_desc.insertMember("comp", HOFFSET(pyne::material_struct, comp), comp_values_array_type);

  // make the data array, have to over-allocate
  material_struct * mat_data  = (material_struct *) malloc(material_struct_size);
  int name_len = name.length();
  for (int i=0; i < 20; i++)
  {
    if (i < name_len)
      (*mat_data).name[i] = name[i];
    else
      (*mat_data).name[i] = NULL;
  };
  (*mat_data).mass = mass;
  (*mat_data).atoms_per_mol = atoms_per_mol;
  for (int n = 0; n != nuc_size; n++)
  {
    if (0 < comp.count(nuclides[n]))
      (*mat_data).comp[n] = comp[nuclides[n]];
    else
      (*mat_data).comp[n] = 0.0;
  };

  // get / make the data set
  bool datapath_exists = h5wrap::path_exists(&db, datapath);
  if (datapath_exists)
  {
    data_set = db.openDataSet(datapath);
    data_space = data_set.getSpace();
    data_rank = data_space.getSimpleExtentDims(data_dims, data_max_dims);

    // Determine the row size.
    int row_num = (int) row;

    if (std::signbit(row))
      row_num = data_dims[0] + row;  // careful, row is negative

    if (data_dims[0] <= row_num)
    {
      // row == -0, extend to data set so that we can append, or
      // row_num is larger than current dimension, resize to accomodate.
      data_dims[0] = row_num + 1;
      data_set.extend(data_dims);
    }
    else if (data_dims[0] < 0)
      throw h5wrap::HDF5BoundsError();

    data_offset[0] = row_num;
  }
  else
  {
    // Get full space
    data_space = H5::DataSpace(1, data_dims, data_max_dims);

    // Make data set properties to enable chunking
    H5::DSetCreatPropList data_set_params;
    hsize_t chunk_dims[1] ={chunksize}; 
    data_set_params.setChunk(1, chunk_dims);

    material_struct * data_fill_value  = (material_struct *) malloc(material_struct_size);
    for (int i=0; i < 20; i++)
      (*data_fill_value).name[i] = NULL;
    (*data_fill_value).mass = -1.0;
    (*data_fill_value).atoms_per_mol = -1.0;
    for (int n = 0; n != nuc_size; n++)
      (*data_fill_value).comp[n] = 0.0;
    data_set_params.setFillValue(data_desc, &data_fill_value);

    // Create the data set
    data_set = db.createDataSet(datapath, data_desc, data_space, data_set_params);
    data_set.extend(data_dims);

    // Add attribute pointing to nuc path
    H5::StrType nuc_attr_type(0, nucpath.length());
    H5::DataSpace nuc_attr_space(H5S_SCALAR);
    H5::Attribute nuc_attr = data_set.createAttribute("nucpath", nuc_attr_type, nuc_attr_space);
    nuc_attr.write(nuc_attr_type, nucpath);

    // Remember to de-allocate
    free(data_fill_value);
  };

  // Get the data hyperslab
  data_hyperslab = data_set.getSpace();
  hsize_t data_count[1] = {1};
  data_hyperslab.selectHyperslab(H5S_SELECT_SET, data_count, data_offset);

  // Get a memory space for writing
  H5::DataSpace mem_space (1, data_count, data_max_dims);

  // Write the row...
  data_set.write(mat_data, data_desc, mem_space, data_hyperslab);

  // Close out the HDF5 file
  db.close();

  // Remember the milk!  
  // ...by which I mean to deallocate
  free(mat_data);
};