libcryfs/implementations/onblocks/datanodestore/DataLeafNode.h

#pragma once
#ifndef MESSMER_BLOBSTORE_IMPLEMENTATIONS_ONBLOCKS_DATANODESTORE_DATALEAFNODE_H_
#define MESSMER_BLOBSTORE_IMPLEMENTATIONS_ONBLOCKS_DATANODESTORE_DATALEAFNODE_H_

#include "DataNode.h"

namespace blobstore {
namespace onblocks {
namespace datanodestore {
class DataInnerNode;

class DataLeafNode final: public DataNode {
public:
  static cpputils::unique_ref<DataLeafNode> InitializeNewNode(cpputils::unique_ref<blockstore::Block> block);

  DataLeafNode(DataNodeView block);
  ~DataLeafNode();

  //Returning uint64_t, because calculations handling this probably need to be done in 64bit to support >4GB blobs.
  uint64_t maxStoreableBytes() const;

  void read(void *target, uint64_t offset, uint64_t size) const;
  void write(const void *source, uint64_t offset, uint64_t size);

  uint32_t numBytes() const;

  void resize(uint32_t size);

private:
  void fillDataWithZeroesFromTo(off_t begin, off_t end);

  DISALLOW_COPY_AND_ASSIGN(DataLeafNode);
};

}
}
}

#endif