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87 lines
2.5 KiB
C++
87 lines
2.5 KiB
C++
/*
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* Copyright (c), 2017, Adrien Devresse <adrien.devresse@epfl.ch>
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*
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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*/
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#pragma once
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#include <H5Gpublic.h>
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#include "H5Object.hpp"
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#include "bits/H5Friends.hpp"
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#include "bits/H5_definitions.hpp"
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#include "bits/H5Annotate_traits.hpp"
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#include "bits/H5Node_traits.hpp"
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#include "bits/H5Path_traits.hpp"
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namespace HighFive {
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namespace detail {
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/// \brief Internal hack to create an `Group` from an ID.
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///
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/// WARNING: Creating an Group from an ID has implications w.r.t. the lifetime of the object
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/// that got passed via its ID. Using this method careless opens up the suite of issues
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/// related to C-style resource management, including the analog of double free, dangling
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/// pointers, etc.
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///
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/// NOTE: This is not part of the API and only serves to work around a compiler issue in GCC which
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/// prevents us from using `friend`s instead. This function should only be used for internal
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/// purposes. The problematic construct is:
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///
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/// template<class Derived>
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/// friend class SomeCRTP<Derived>;
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///
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/// \private
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Group make_group(hid_t);
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} // namespace detail
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///
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/// \brief Represents an hdf5 group
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class Group: public Object,
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public NodeTraits<Group>,
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public AnnotateTraits<Group>,
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public PathTraits<Group> {
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public:
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const static ObjectType type = ObjectType::Group;
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Group() = default;
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std::pair<unsigned int, unsigned int> getEstimatedLinkInfo() const;
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/// \brief Get the list of properties for creation of this group
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GroupCreateProps getCreatePropertyList() const {
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return details::get_plist<GroupCreateProps>(*this, H5Gget_create_plist);
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}
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explicit Group(Object&& o) noexcept
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: Object(std::move(o)) {};
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protected:
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using Object::Object;
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friend Group detail::make_group(hid_t);
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friend class File;
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friend class Reference;
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#if HIGHFIVE_HAS_FRIEND_DECLARATIONS
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template <typename Derivate>
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friend class ::HighFive::NodeTraits;
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#endif
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};
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inline std::pair<unsigned int, unsigned int> Group::getEstimatedLinkInfo() const {
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auto gcpl = getCreatePropertyList();
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auto eli = EstimatedLinkInfo(gcpl);
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return std::make_pair(eli.getEntries(), eli.getNameLength());
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}
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namespace detail {
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inline Group make_group(hid_t hid) {
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return Group(hid);
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}
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} // namespace detail
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} // namespace HighFive
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