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37 lines
916 B
C++
37 lines
916 B
C++
//=======================================================================
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// Copyright Baptiste Wicht 2013-2016.
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// Distributed under the terms of the MIT License.
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// (See accompanying file LICENSE or copy at
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// http://www.opensource.org/licenses/MIT)
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//=======================================================================
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#ifndef BITFIELD_HPP
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#define BITFIELD_HPP
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#include <types.hpp>
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namespace std {
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template<typename S, typename T, size_t Position, size_t Size>
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struct bit_field {
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S* value;
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bit_field(S* value) : value(value) {}
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T operator*() const {
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return (*value >> Position) & ((1ULL << Size) - 1);
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}
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bit_field& operator=(T new_value_real){
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S new_value(new_value_real);
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size_t mask = ((S(1) << Size) - 1) << Position;
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*value = (*value & ~mask) | ((new_value << Position) & mask);
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return *this;
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}
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};
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} //end of namespace std
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#endif
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