61 lines
1.4 KiB
C++
61 lines
1.4 KiB
C++
#pragma once
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#ifndef BLOBSTORE_IMPLEMENTATIONS_ONBLOCKS_DATANODESTORE_DATAINNERNODE_H_
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#define BLOBSTORE_IMPLEMENTATIONS_ONBLOCKS_DATANODESTORE_DATAINNERNODE_H_
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#include "DataNode.h"
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namespace blobstore {
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namespace onblocks {
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namespace datanodestore {
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class DataInnerNode: public DataNode {
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public:
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static std::unique_ptr<DataInnerNode> InitializeNewNode(std::unique_ptr<blockstore::Block> block, const DataNode &first_child_key);
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DataInnerNode(DataNodeView block);
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virtual ~DataInnerNode();
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struct ChildEntry {
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public:
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blockstore::Key key() const {
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return blockstore::Key::FromBinary(_keydata);
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}
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private:
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void setKey(const blockstore::Key &key) {
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key.ToBinary(_keydata);
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}
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friend class DataInnerNode;
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uint8_t _keydata[blockstore::Key::KEYLENGTH_BINARY];
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DISALLOW_COPY_AND_ASSIGN(ChildEntry);
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};
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static constexpr uint32_t MAX_STORED_CHILDREN = DataNodeView::DATASIZE_BYTES / sizeof(ChildEntry);
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uint8_t depth() const;
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ChildEntry *getChild(unsigned int index);
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const ChildEntry *getChild(unsigned int index) const;
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uint32_t numChildren() const;
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void addChild(const DataNode &child_key);
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void removeLastChild();
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ChildEntry *LastChild();
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const ChildEntry *LastChild() const;
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private:
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ChildEntry *ChildrenBegin();
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ChildEntry *ChildrenEnd();
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const ChildEntry *ChildrenBegin() const;
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const ChildEntry *ChildrenEnd() const;
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};
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}
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}
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}
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#endif
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