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baldurk
54 lines
2.3 KiB
C++
54 lines
2.3 KiB
C++
/******************************************************************************
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* The MIT License (MIT)
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*
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* Copyright (c) 2019-2020 Baldur Karlsson
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*
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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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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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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
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* THE SOFTWARE.
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******************************************************************************/
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#pragma once
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template <typename BitType, typename FlagType, typename SignedType>
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class BitFlagIterator
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{
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private:
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FlagType flags;
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public:
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inline BitFlagIterator() : flags(0) {}
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inline BitFlagIterator(FlagType mask) : flags(mask) {}
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inline BitFlagIterator(FlagType mask, BitType bit) : flags(mask & ~(bit - 1)) {}
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inline BitFlagIterator(const BitFlagIterator &o) : flags(o.flags) {}
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static inline BitFlagIterator begin(FlagType mask) { return BitFlagIterator(mask); }
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static inline BitFlagIterator end() { return BitFlagIterator(0); }
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inline BitType operator*() const { return (BitType)(flags & (FlagType)(-(SignedType)flags)); }
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inline BitFlagIterator &operator++()
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{
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flags ^= **this;
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return *this;
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}
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inline bool operator==(const BitFlagIterator &rhs) const { return flags == rhs.flags; }
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inline bool operator!=(const BitFlagIterator &rhs) const { return flags != rhs.flags; }
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inline BitFlagIterator &operator=(const BitFlagIterator &rhs)
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{
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flags = rhs.flags;
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return *this;
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}
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};
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