inline boost::any read_attribute_if_exists(H5::H5Object const& object, std::string const& name)
{
if (exists_attribute(object, name)) {
return read_attribute<T>(object, name);
}
return boost::any();
}
inline typename boost::enable_if<boost::mpl::and_<
is_vector<T>
, boost::is_same<typename T::value_type, std::string>
>, void>::type
write_attribute(H5::H5Object const& object, std::string const& name, T const& value)
{
size_t size = value.size();
// size of longest string
size_t str_len = 0;
for (size_t i = 0; i < size; ++i) {
str_len = std::max(str_len, value[i].size());
}
// remove attribute if it exists and re-create with proper String datatype
// and simple dataspace
if (exists_attribute(object, name)) {
object.removeAttr(name);
}
hsize_t dim[1] = { size };
H5::DataSpace ds(1, dim);
H5::StrType tid(H5::PredType::C_S1, str_len);
H5::Attribute attr = object.createAttribute(name, tid, ds);
// copy strings to contiguous buffer
std::vector<char> buffer(size * str_len);
for (size_t i = 0; i < size; ++i) {
value[i].copy(buffer.data() + i * str_len, str_len);
}
attr.write(tid, &*buffer.begin());
}
inline void delete_attribute(h5xxObject const& object, std::string const& name)
{
if (exists_attribute(object, name)) {
if (H5Adelete(object.hid(), name.c_str()) < 0) {
throw error("deleting attribute \"" + name + "\" from HDF5 object \"" + get_name(object) + "\"");
}
}
}
void* widget::attribute(const std::string& name) const
{
return exists_attribute(name) ? impl_->attributes_[name].data() : nullptr;
}
