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frame_check_sequence.h
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/******************************************************************************
The MIT License(MIT)
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
Copyright(c) 2014 John Wellbelove
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files(the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions :
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
******************************************************************************/
#ifndef ETL_FRAME_CHECK_SEQUENCE_INCLUDED
#define ETL_FRAME_CHECK_SEQUENCE_INCLUDED
#include "platform.h"
#include "binary.h"
#include "iterator.h"
#include "static_assert.h"
#include "type_traits.h"
#include <stdint.h>
ETL_STATIC_ASSERT(ETL_USING_8BIT_TYPES, "This file does not currently support targets with no 8bit type");
namespace etl
{
namespace private_frame_check_sequence
{
//***************************************************
//***************************************************
template <typename TFrame_Check_Sequence>
class add_insert_iterator : public etl::iterator<ETL_OR_STD::output_iterator_tag, typename TFrame_Check_Sequence::value_type>
{
public:
//***********************************
explicit add_insert_iterator(TFrame_Check_Sequence& fcs) ETL_NOEXCEPT
: p_fcs(&fcs)
{
}
//***********************************
add_insert_iterator& operator*() ETL_NOEXCEPT
{
return *this;
}
//***********************************
add_insert_iterator& operator++() ETL_NOEXCEPT
{
return *this;
}
//***********************************
add_insert_iterator& operator++(int) ETL_NOEXCEPT
{
return *this;
}
//***********************************
add_insert_iterator& operator=(uint8_t value)
{
p_fcs->add(value);
return *this;
}
private:
TFrame_Check_Sequence* p_fcs;
};
} // namespace private_frame_check_sequence
//***************************************************************************
//***************************************************************************
template <typename TPolicy>
class frame_check_sequence
{
public:
typedef TPolicy policy_type;
typedef typename policy_type::value_type value_type;
typedef private_frame_check_sequence::add_insert_iterator< frame_check_sequence<TPolicy> > add_insert_iterator;
ETL_STATIC_ASSERT(etl::is_unsigned<value_type>::value, "Signed frame check type not supported");
//*************************************************************************
//*************************************************************************
ETL_CONSTEXPR14 frame_check_sequence()
: frame_check()
{
reset();
}
//*************************************************************************
//*************************************************************************
template <typename TIterator>
ETL_CONSTEXPR14 frame_check_sequence(TIterator begin, const TIterator end)
: frame_check()
{
ETL_STATIC_ASSERT(sizeof(typename etl::iterator_traits<TIterator>::value_type) == 1, "Type not supported");
reset();
add(begin, end);
}
//*************************************************************************
//*************************************************************************
ETL_CONSTEXPR14 void reset()
{
frame_check = policy.initial();
}
//*************************************************************************
//*************************************************************************
template <typename TIterator>
ETL_CONSTEXPR14 void add(TIterator begin, const TIterator end)
{
ETL_STATIC_ASSERT(sizeof(typename etl::iterator_traits<TIterator>::value_type) == 1, "Type not supported");
while (begin != end)
{
frame_check = policy.add(frame_check, static_cast<uint8_t>(*begin));
++begin;
}
}
//*************************************************************************
//*************************************************************************
ETL_CONSTEXPR14 void add(uint8_t value_)
{
frame_check = policy.add(frame_check, value_);
}
//*************************************************************************
//*************************************************************************
ETL_CONSTEXPR14 value_type value() const
{
return policy.final(frame_check);
}
//*************************************************************************
//*************************************************************************
ETL_CONSTEXPR14 operator value_type() const
{
return policy.final(frame_check);
}
//*************************************************************************
//*************************************************************************
ETL_CONSTEXPR14 add_insert_iterator input()
{
return add_insert_iterator(*this);
}
private:
value_type frame_check;
policy_type policy;
};
} // namespace etl
#endif
binary.h
etl::private_frame_check_sequence::add_insert_iterator
Definition frame_check_sequence.h:51
etl::frame_check_sequence::add
ETL_CONSTEXPR14 void add(uint8_t value_)
Definition frame_check_sequence.h:159
etl::frame_check_sequence::add
ETL_CONSTEXPR14 void add(TIterator begin, const TIterator end)
Definition frame_check_sequence.h:145
etl::frame_check_sequence::reset
ETL_CONSTEXPR14 void reset()
Resets the FCS to the initial state.
Definition frame_check_sequence.h:134
etl::frame_check_sequence::frame_check_sequence
ETL_CONSTEXPR14 frame_check_sequence(TIterator begin, const TIterator end)
Definition frame_check_sequence.h:122
etl::frame_check_sequence::frame_check_sequence
ETL_CONSTEXPR14 frame_check_sequence()
Default constructor.
Definition frame_check_sequence.h:110
etl::frame_check_sequence::input
ETL_CONSTEXPR14 add_insert_iterator input()
Gets an add_insert_iterator for input.
Definition frame_check_sequence.h:183
etl::frame_check_sequence::value
ETL_CONSTEXPR14 value_type value() const
Gets the FCS value.
Definition frame_check_sequence.h:167
iterator.h
etl
Definition absolute.h:40
etl::end
TContainer::iterator end(TContainer &container)
Definition iterator.h:1166
etl::begin
TContainer::iterator begin(TContainer &container)
Definition iterator.h:1136
platform.h
etl::value_type
etl::iterator
iterator
Definition iterator.h:482
type_traits.h