151 lines
4.0 KiB
C++
151 lines
4.0 KiB
C++
/*
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pdu-stream.h
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Copyright (c) 2021 Kevin Matz (kevin.matz@gmail.com)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#pragma once
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#include "uuid.h"
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#include <memory>
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#include <iostream>
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namespace ACN::PDU {
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struct pdu_stream_object; // forward declare
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/**
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* @brief Input/Output stream of nested PDU
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*/
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class pdu_stream
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: public std::enable_shared_from_this<pdu_stream>
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, private std::basic_streambuf<uint8_t>
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, public std::basic_iostream<uint8_t>
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{
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public:
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pdu_stream(uint8_t * p, std::streamsize l);
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// input sequence
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uint32_t available();
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uint8_t * data();
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// output sequence
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uint32_t size();
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uint8_t * base();
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// stream objects
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pdu_stream& operator>> (pdu_stream_object& obj);
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pdu_stream& operator<< (const pdu_stream_object& obj);
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// unsigned integer
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pdu_stream& operator>> (uint8_t& val);
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pdu_stream& operator<< (const uint8_t& val);
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pdu_stream& operator>> (uint16_t& val);
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pdu_stream& operator<< (const uint16_t& val);
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pdu_stream& operator>> (uint32_t& val);
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pdu_stream& operator<< (const uint32_t& val);
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pdu_stream& operator>> (uint64_t& val);
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pdu_stream& operator<< (const uint64_t& val);
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// signed integer
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pdu_stream& operator>> (int8_t& val);
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pdu_stream& operator<< (const int8_t& val);
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pdu_stream& operator>> (int16_t& val);
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pdu_stream& operator<< (const int16_t& val);
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pdu_stream& operator>> (int32_t& val);
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pdu_stream& operator<< (const int32_t& val);
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pdu_stream& operator>> (int64_t& val);
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pdu_stream& operator<< (const int64_t& val);
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// uuid
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pdu_stream& operator>> (UUID::uuid& uuid);
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pdu_stream& operator<< (const UUID::uuid& uuid);
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// strings
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void readString(std::string& str, const int fixed_length = 0);
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void writeString(const std::string& str, const size_t fixed_length = 0,
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const bool terminated = true);
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// reinterpreted i/o
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/**
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* @brief readType
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* @return T
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*/
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template<typename T>
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T readType()
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{
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if (in_avail() < sizeof(T))
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setstate(std::ios_base::failbit);
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if (!good())
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return 0;
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T ret = 0;
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auto data = reinterpret_cast<uint8_t*>(&ret);
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for (int i = sizeof(T); --i >= 0; )
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data[i] = get();
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if (!in_avail())
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setstate(std::ios_base::eofbit);
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return ret;
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}
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/**
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* @brief writeType
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* @param val
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*/
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template<typename T>
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void writeType (const T& val)
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{
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auto data = reinterpret_cast<const uint8_t*>(&val);
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for (int i = sizeof(T); --i >= 0; )
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put(data[i]);
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}
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};
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/**
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* @brief A shared pointer to pdu_stream.
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*/
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using Stream = std::shared_ptr<pdu_stream>;
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/**
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* @brief The inheritable base of data objects that can be read from and written to a pdu_stream.
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*/
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struct pdu_stream_object
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{
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virtual ~pdu_stream_object() {};
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/**
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* @brief streamSize
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* @return length (count of octets) on the wire
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*/
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virtual size_t streamSize() const = 0;
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/**
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* @brief fill structure data from input stream
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*/
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virtual void iStream(Stream) = 0;
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/**
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* @brief write structure data to output stream
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*/
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virtual void oStream(Stream) const = 0;
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};
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} // ACN::PDU
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