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/*
* Copyright (c) 2015-2016, Luca Fulchir<luca@fulchir.it>, All rights reserved.
*
* This file is part of "libRaptorQ".
*
* libRaptorQ is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* libRaptorQ is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* and a copy of the GNU Lesser General Public License
* along with libRaptorQ. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "RaptorQ/v1/common.hpp"
#include <cmath>
// NOTE: this file is included from RFC.hpp and CPP_RFC_API.hpp
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// Yes, another template parameter would keep us away from macros.
// But I prefer to kep the parameters the same as for the classes.
// So we keep the macros. (NOTE: this header requires C++98 compatibility)
#ifdef RQ_HEADER_ONLY
#include "RaptorQ/v1/RFC.hpp"
namespace RFC6330__v1 {
namespace Impl {
template<typename Rnd_It, typename Fwd_It>
class Encoder;
template<typename In_It, typename Fwd_It>
class Decoder;
}
}
#define RQ_ENC_T Impl::Encoder<Rnd_It, Fwd_It>
#define RQ_DEC_T Impl::Decoder<In_It, Fwd_It>
#else
#include "RaptorQ/v1/wrapper/CPP_RFC_API_void.hpp"
#define RQ_ENC_T Impl::Encoder_void
#define RQ_DEC_T Impl::Decoder_void
#endif
///////////////////
//// Iterators
///////////////////
namespace RFC6330__v1 {
namespace It {
namespace Encoder {
template <typename Rnd_It, typename Fwd_It>
class RAPTORQ_API Symbol
{
public:
Symbol (RQ_ENC_T *const enc, const uint32_t id)
: _enc (enc), _id (id) {}
Symbol() = delete;
Symbol (const Symbol&) = default;
Symbol& operator= (const Symbol&) = default;
Symbol (Symbol&&) = default;
Symbol& operator= (Symbol&&) = default;
~Symbol() = default;
uint64_t operator() (Fwd_It &start, const Fwd_It end)
{
if (_enc == nullptr)
return 0;
return _enc->encode (start, end, _id);
}
uint32_t id() const
{ return _id; }
uint8_t block() const
{ return static_cast<uint8_t> (_id >> 24); }
uint32_t esi() const
{
uint32_t rev_mask = static_cast<uint32_t> (0xFF) << 24;
return static_cast<uint8_t> (_id & ~rev_mask);
}
private:
RQ_ENC_T *const _enc;
const uint32_t _id;
};
template <typename Rnd_It, typename Fwd_It>
class RAPTORQ_API Symbol_Iterator :
public std::iterator<std::input_iterator_tag, Symbol<Rnd_It, Fwd_It>>
{
public:
Symbol_Iterator (RQ_ENC_T *const enc, const uint32_t id)
: _enc (enc), _id (id) {}
Symbol_Iterator() = delete;
Symbol_Iterator (const Symbol_Iterator&) = default;
Symbol_Iterator& operator= (const Symbol_Iterator&) = default;
Symbol_Iterator (Symbol_Iterator&&) = default;
Symbol_Iterator& operator= (Symbol_Iterator&&) = default;
~Symbol_Iterator() = default;
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Symbol<Rnd_It, Fwd_It> operator*()
{ return Symbol<Rnd_It, Fwd_It> (_enc, _id); }
Symbol_Iterator<Rnd_It, Fwd_It>& operator++()
{
++_id;
return *this;
}
Symbol_Iterator<Rnd_It, Fwd_It> operator++ (const int i) const
{
return Symbol_Iterator<Rnd_It, Fwd_It> (_enc, _id +
static_cast<uint32_t> (i));
}
bool operator== (const Symbol_Iterator<Rnd_It, Fwd_It> &it) const
{ return it._id == _id && it._enc == _enc; }
bool operator!= (const Symbol_Iterator<Rnd_It, Fwd_It> &it) const
{ return it._id != _id && it._enc == _enc; }
private:
RQ_ENC_T *const _enc;
uint32_t _id;
};
template <typename Rnd_It, typename Fwd_It>
class RAPTORQ_API Block
{
public:
Block (RQ_ENC_T *const enc, const uint8_t block)
: _enc (enc), _block (block) {}
Block() = delete;
Block (const Block&) = default;
Block& operator= (const Block&) = default;
Block (Block&&) = default;
Block& operator= (Block&&) = default;
~Block() = default;
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Symbol_Iterator<Rnd_It, Fwd_It> begin_source() const
{
if (_enc == nullptr)
return Symbol_Iterator<Rnd_It, Fwd_It> (nullptr, 0);
const uint32_t id = static_cast<uint32_t> (_block) << 24;
return Symbol_Iterator<Rnd_It, Fwd_It> (_enc, id);
}
Symbol_Iterator<Rnd_It, Fwd_It> end_source() const
{
if (_enc == nullptr)
return Symbol_Iterator<Rnd_It, Fwd_It> (nullptr, 0);
const uint32_t id = static_cast<uint32_t> (_block) << 24;
return Symbol_Iterator<Rnd_It, Fwd_It> (_enc,
id + _enc->symbols (_block));
}
Symbol_Iterator<Rnd_It, Fwd_It> begin_repair() const
{ return end_source(); }
Symbol_Iterator<Rnd_It, Fwd_It> end_repair (uint32_t repairs) const
{
if (repairs > std::pow (2, 20))
repairs = static_cast<uint32_t> (std::pow (2, 20));
if (_enc == nullptr)
return Symbol_Iterator<Rnd_It, Fwd_It> (nullptr, 0);
const uint32_t id = static_cast<uint32_t> (_block) << 24;
return Symbol_Iterator<Rnd_It, Fwd_It> (_enc,
id + _enc->symbols (_block) + repairs);
}
uint8_t id() const
{ return _block; }
uint32_t max_repair() const
{
if (_enc == nullptr)
return 0;
return _enc->max_repair (_block);
}
uint16_t symbols() const
{
if (_enc == nullptr)
return 0;
return _enc->symbols (_block);
}
uint32_t block_size() const
{
if (_enc == nullptr)
return 0;
return _enc->block_size (_block);
}
private:
RQ_ENC_T *const _enc;
const uint8_t _block;
};
template <typename Rnd_It, typename Fwd_It>
class RAPTORQ_API Block_Iterator :
public std::iterator<std::input_iterator_tag, Block<Rnd_It, Fwd_It>>
{
public:
Block_Iterator (RQ_ENC_T *const enc, const uint8_t block)
: _enc (enc), _block (block) {}
Block_Iterator() = delete;
Block_Iterator (const Block_Iterator&) = default;
Block_Iterator& operator= (const Block_Iterator&) = default;
Block_Iterator (Block_Iterator&&) = default;
Block_Iterator& operator= (Block_Iterator&&) = default;
~Block_Iterator() = default;
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Block<Rnd_It, Fwd_It> operator*()
{ return Block<Rnd_It, Fwd_It> (_enc, _block); }
Block_Iterator<Rnd_It, Fwd_It>& operator++()
{
++_block;
return *this;
}
Block_Iterator<Rnd_It, Fwd_It> operator++ (const int i) const
{
return Block_Iterator<Rnd_It, Fwd_It> (_enc, _block +
static_cast<uint8_t> (i));
}
bool operator== (const Block_Iterator<Rnd_It, Fwd_It> &it) const
{ return it._block == _block && it._enc == _enc; }
bool operator!= (const Block_Iterator<Rnd_It, Fwd_It> &it) const
{ return it._block != _block && it._enc == _enc; }
private:
RQ_ENC_T *const _enc;
uint8_t _block;
};
} // namespace Encoder
/////////////////
//// Decoder
/////////////////
namespace Decoder {
template <typename In_It, typename Fwd_It>
class RAPTORQ_API Symbol
{
public:
Symbol (RQ_DEC_T *const dec, const uint32_t id)
: _dec (dec), _id (id) {}
Symbol() = delete;
Symbol (const Symbol&) = default;
Symbol& operator= (const Symbol&) = default;
Symbol (Symbol&&) = default;
Symbol& operator= (Symbol&&) = default;
~Symbol() = default;
uint64_t operator() (In_It &start, const In_It end)
{
if (_dec == nullptr || esi (_id) > _dec->symbols (block (_id)))
return _dec->decode_symbol (start, end,
static_cast<uint16_t> (esi (_id)), block (_id));
}
uint32_t id() const
{ return _id; }
uint8_t block() const
{ return static_cast<uint8_t> (_id >> 24); }
uint32_t esi() const
{
uint32_t rev_mask = static_cast<uint32_t> (0xFF) << 24;
return static_cast<uint8_t> (_id & ~rev_mask);
}
private:
RQ_DEC_T *const _dec;
const uint32_t _id;
};
template <typename In_It, typename Fwd_It>
class RAPTORQ_API Symbol_Iterator :
public std::iterator<std::input_iterator_tag, Symbol<In_It, Fwd_It>>
{
public:
Symbol_Iterator (RQ_DEC_T *const dec, const uint32_t id)
: _dec (dec), _id (id) {}
Symbol_Iterator() = delete;
Symbol_Iterator (const Symbol_Iterator&) = default;
Symbol_Iterator& operator= (const Symbol_Iterator&) = default;
Symbol_Iterator (Symbol_Iterator&&) = default;
Symbol_Iterator& operator= (Symbol_Iterator&&) = default;
~Symbol_Iterator() = default;
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Symbol<In_It, Fwd_It> operator*()
{ return Symbol<In_It, Fwd_It> (_dec, _id); }
Symbol_Iterator<In_It, Fwd_It>& operator++()
{
++_id;
return *this;
}
Symbol_Iterator<In_It, Fwd_It> operator++ (const int i) const
{
return Symbol_Iterator<In_It, Fwd_It> (_dec, _id +
static_cast<uint32_t> (i));
}
bool operator== (const Symbol_Iterator<In_It, Fwd_It> &it) const
{ return it._id == _id && it._dec == _dec; }
bool operator!= (const Symbol_Iterator<In_It, Fwd_It> &it) const
{ return it._id != _id && it._dec == _dec; }
private:
RQ_DEC_T *const _dec;
uint32_t _id;
};
template <typename In_It, typename Fwd_It>
class RAPTORQ_API Block
{
public:
Block (RQ_DEC_T *const dec, const uint8_t block)
: _dec (dec), _block (block) {}
Block() = delete;
Block (const Block&) = default;
Block& operator= (const Block&) = default;
Block (Block&&) = default;
Block& operator= (Block&&) = default;
~Block() = default;
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Symbol_Iterator<In_It, Fwd_It> begin() const
{
if (_dec == nullptr)
return Symbol_Iterator<In_It, Fwd_It> (nullptr, 0);
const uint32_t id = static_cast<uint32_t> (_block) << 24;
return Symbol_Iterator<In_It, Fwd_It> (_dec, id);
}
Symbol_Iterator<In_It, Fwd_It> end() const
{
if (_dec == nullptr)
return Symbol_Iterator<In_It, Fwd_It> (nullptr, 0);
const uint32_t id = static_cast<uint32_t> (_block) << 24;
return Symbol_Iterator<In_It, Fwd_It> (_dec, id +
_dec->symbols (_block));
}
uint8_t id() const
{ return _block; }
uint16_t symbols() const
{
if (_dec == nullptr)
return 0;
return _dec->symbols (_block);
}
uint32_t block_size() const
{
if (_dec == nullptr)
return 0;
return _dec->block_size (_block);
}
private:
RQ_DEC_T *const _dec;
const uint8_t _block;
};
template <typename In_It, typename Fwd_It>
class RAPTORQ_API Block_Iterator :
public std::iterator<std::input_iterator_tag, Block<In_It, Fwd_It>>
{
public:
Block_Iterator (RQ_DEC_T *const dec, const uint8_t block)
: _dec (dec), _block (block) {}
Block_Iterator() = delete;
Block_Iterator (const Block_Iterator&) = default;
Block_Iterator& operator= (const Block_Iterator&) = default;
Block_Iterator (Block_Iterator&&) = default;
Block_Iterator& operator= (Block_Iterator&&) = default;
~Block_Iterator() = default;
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Block<In_It, Fwd_It> operator*()
{ return Block<In_It, Fwd_It> (_dec, _block); }
Block_Iterator<In_It, Fwd_It>& operator++()
{
++_block;
return *this;
}
Block_Iterator<In_It, Fwd_It> operator++ (const int i) const
{
return Block_Iterator<In_It, Fwd_It> (_dec, _block +
static_cast<uint8_t> (i));
}
bool operator== (const Block_Iterator<In_It, Fwd_It> &it) const
{ return it._block == _block && it._dec == _dec; }
bool operator!= (const Block_Iterator<In_It, Fwd_It> &it) const
{ return it._block != _block && it._dec == _dec; }
private:
RQ_DEC_T *const _dec;
uint8_t _block;
};
} // namespace Decoder
} // namespace It
} // namespace Rfc6330__v1