Junxiao Shi
df3b438c40
FragIndex and FragCount fields are encoded as nonNegativeInteger. refs #1283 Change-Id: I4654078c3bfd73c83ce06ce6a9cd97952a4f49f8
73 lines
1.3 KiB
C++
73 lines
1.3 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/**
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* Copyright (C) 2014 Named Data Networking Project
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* See COPYING for copyright and distribution information.
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*/
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#ifndef NFD_FACE_NDNLP_SEQUENCE_GENERATOR_HPP
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#define NFD_FACE_NDNLP_SEQUENCE_GENERATOR_HPP
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#include "common.hpp"
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namespace nfd {
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namespace ndnlp {
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/** \brief represents a block of sequence numbers
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*/
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class SequenceBlock
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{
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public:
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SequenceBlock(uint64_t start, size_t count);
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/** \return{ the pos-th sequence number }
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*/
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uint64_t
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operator[](size_t pos) const;
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size_t
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count() const;
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private:
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uint64_t m_start;
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size_t m_count;
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};
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inline uint64_t
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SequenceBlock::operator[](size_t pos) const
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{
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if (pos >= m_count)
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throw std::out_of_range("pos");
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return m_start + static_cast<uint64_t>(pos);
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}
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inline size_t
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SequenceBlock::count() const
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{
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return m_count;
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}
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/** \class SequenceGenerator
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* \brief generates sequence numbers
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*/
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class SequenceGenerator : noncopyable
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{
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public:
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SequenceGenerator();
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/** \brief generates a block of consecutive sequence numbers
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*
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* This block must not overlap with a recent block.
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*/
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SequenceBlock
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nextBlock(size_t count);
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private:
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/// next sequence number
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uint64_t m_next;
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};
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} // namespace ndnlp
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} // namespace nfd
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#endif // NFD_FACE_NDNLP_SEQUENCE_GENERATOR_HPP
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