Ashin Walpola
d107534eb2
obu-firmware builds against the vanetza-idf C-ITS library, which until now came from the colleague's microbu-esp32c5 tree beside the repository and was not tracked here, so a clone of this repository could not build the firmware it ships. The library alone is now part of obu-firmware, as obu-firmware/external/vanetza-idf: their external/vanetza-idf at commit cf4b99f, unchanged (9775 files; see its PROVENANCE.md). CMake takes it from there by default; -DVANETZA_IDF_DIR still points the build elsewhere. The rest of the colleague's tree (their own VAM firmware, PKI tooling, station-link Python tools, the V2X2MAP bridge) stays out of this repository and gitignored; nothing is pushed to their repository. NOTES.md, docs/06, TODO.md and the pcap verifier's usage line point at the new location.
45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
#ifndef BIT_NUMBER_HPP_H3ODBQR7
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#define BIT_NUMBER_HPP_H3ODBQR7
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#include <boost/operators.hpp>
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#include <cstddef>
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#include <type_traits>
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namespace vanetza {
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/**
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* BitNumber restricts the value range by the given width
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*
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* \tparam T underlying integral type
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* \tparam WIDTH number of bits used to represent a number
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*/
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template<typename T, std::size_t WIDTH>
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class BitNumber : public boost::totally_ordered<BitNumber<T, WIDTH>>
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{
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static_assert(std::is_integral<T>::value == true,
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"only integral types are supported");
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static_assert(sizeof(T) * 8 > WIDTH,
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"width has to be less than size of underlying type");
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public:
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static constexpr T mask = (1 << WIDTH) - 1; /**< excessive bits are masked */
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static constexpr std::size_t bits = WIDTH; /**< number of bits used */
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typedef T value_type; /**< underlying (integral) value type */
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BitNumber() : mValue(0) {}
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BitNumber(T value) : mValue(value & mask) {}
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BitNumber& operator=(T value) { mValue = value & mask; return *this; }
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T raw() const { return mValue; }
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bool operator<(BitNumber other) const { return mValue < other.mValue; }
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bool operator==(BitNumber other) const { return mValue == other.mValue; }
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private:
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T mValue;
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};
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} // namespace vanetza
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#endif /* BIT_NUMBER_HPP_H3ODBQR7 */
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