highfive/bits/H5Reference_misc.hpp

0001 /*
0002  *  Copyright (c), 2020, EPFL - Blue Brain Project
0003  *
0004  *  Distributed under the Boost Software License, Version 1.0.
0005  *    (See accompanying file LICENSE_1_0.txt or copy at
0006  *          http://www.boost.org/LICENSE_1_0.txt)
0007  *
0008  */
0009
0010 #pragma once
0011
0012 #include <string>
0013 #include <H5Ppublic.h>
0014
0015 #include "H5Utils.hpp"
0016
0017 #include "../H5Object.hpp"
0018
0019 #include "h5r_wrapper.hpp"
0020
0021 namespace HighFive {
0022
0023 inline Reference::Reference(const Object& location, const Object& object)
0024     : parent_id(location.getId()) {
0025     obj_name = details::get_name([&](char* buffer, size_t length) {
0026         return detail::h5i_get_name(object.getId(), buffer, length);
0027     });
0028 }
0029
0030 inline void Reference::create_ref(hobj_ref_t* refptr) const {
0031     detail::h5r_create(refptr, parent_id, obj_name.c_str(), H5R_OBJECT, -1);
0032 }
0033
0034 inline ObjectType Reference::getType(const Object& location) const {
0035     return get_ref(location).getType();
0036 }
0037
0038 template <typename T>
0039 inline T Reference::dereference(const Object& location) const {
0040     static_assert(std::is_same<DataSet, T>::value || std::is_same<Group, T>::value,
0041                   "We can only (de)reference HighFive::Group or HighFive:DataSet");
0042     auto obj = get_ref(location);
0043     if (obj.getType() != T::type) {
0044         HDF5ErrMapper::ToException<ReferenceException>("Trying to dereference the wrong type");
0045     }
0046 #if defined __GNUC__ && __GNUC__ < 9
0047     return std::move(obj);
0048 #else
0049     return obj;
0050 #endif
0051 }
0052
0053 inline Object Reference::get_ref(const Object& location) const {
0054 #if (H5Rdereference_vers == 2)
0055     hid_t res = detail::h5r_dereference(location.getId(), H5P_DEFAULT, H5R_OBJECT, &href);
0056 #else
0057     hid_t res = detail::h5r_dereference(location.getId(), H5R_OBJECT, &href);
0058 #endif
0059     return Object(res);
0060 }
0061
0062 }  // namespace HighFive