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#ifndef UTILS_BITSET_HPP |
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#define UTILS_BITSET_HPP |
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#include <iostream> |
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#include <functional> |
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#include <vector> |
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namespace oopse { |
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/** |
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* @class BitSet BitSet.hpp "BitSet.hpp" |
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* @brief BitSet is a wrapper class of std::vector<char> |
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* @brief BitSet is a wrapper class of std::vector<char> to act as a growable std::bitset |
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*/ |
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class BitSet { |
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public: |
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/** */ |
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BitSet() {} |
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/** */ |
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BitSet(int nbits) { bitset_.resize(nbits); } |
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BitSet(int nbits) : bitset_(nbits) {clearAll(); } |
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/** Returns the number of bits set to true in this BitSet. */ |
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int countBits(); |
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/** Returns a new BitSet composed of bits from this BitSet from fromIndex(inclusive) to toIndex(exclusive). */ |
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BitSet get(int fromIndex, int toIndex); |
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/** Returns true if this BitSet contains no bits that are set to true. */ |
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bool isEmpty(); |
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/** Returns true if any bits are set to true */ |
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bool any() {return !none(); } |
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/** Returns true if no bits are set to true */ |
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bool none(); |
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int firstOffBit() { return !bitset_[0] ? 0 : nextOffBit(0); } |
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/** Returns the index of the first bit that is set to false that occurs on or after the specified starting index.*/ |
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int nextOffBit(int fromIndex); |
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int nextOffBit(int fromIndex) const; |
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int firstOnBit() { return bitset_[0] ? 0 : nextOnBit(0); } |
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/** Returns the index of the first bit that is set to true that occurs on or after the specified starting index. */ |
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int nextOnBit(int fromIndex); |
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int nextOnBit(int fromIndex) const; |
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/** Performs a logical AND of this target bit set with the argument bit set. */ |
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void and(const BitSet& bs); |
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/** Clears all of the bits in this BitSet whose corresponding bit is set in the specified BitSet. */ |
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void andNot(const BitSet& bs); |
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void andOperator (const BitSet& bs); |
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/** Performs a logical OR of this bit set with the bit set argument. */ |
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void or(const BitSet& bs); |
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void orOperator (const BitSet& bs); |
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/** Performs a logical XOR of this bit set with the bit set argument. */ |
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void xor(const BitSet& bs); |
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void xorOperator (const BitSet& bs); |
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void setBitOn(int bitIndex) { setBit(bitIndex, true); } |
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void setRangeOff(int fromIndex, int toIndex) { setBits(fromIndex, toIndex, false); } |
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/** Sets all of the bits in this BitSet to false. */ |
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void clear() { setRangeOff(0, size()); } |
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void clearAll() { setRangeOff(0, size()); } |
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void setAll() { setRangeOn(0, size()); } |
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/** Returns the number of bits of space actually in use by this BitSet to represent bit values. */ |
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int size() { return bitset_.size(); } |
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int size() const { return bitset_.size(); } |
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/** Changes the size of BitSet*/ |
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bool resize(int nbits) { bitset_.resize(); } |
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void resize(int nbits); |
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BitSet& operator&= (const BitSet &bs) { and(bs); return *this; } |
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BitSet& operator|= (const BitSet &bs) { or(bs); return *this; } |
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BitSet& operator^= (const BitSet &bs) { xor(bs); return *this; } |
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bool operator[] (int bitIndex) { return bitset_[bitIndex]; } |
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friend BitSet operator| (BitSet& bs1, BitSet& bs2); |
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friend BitSet operator& (BitSet& bs1, BitSet& bs2); |
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friend BitSet operator^ (BitSet& bs1, BitSet& bs2); |
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BitSet& operator&= (const BitSet &bs) { andOperator (bs); return *this; } |
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BitSet& operator|= (const BitSet &bs) { orOperator (bs); return *this; } |
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BitSet& operator^= (const BitSet &bs) { xorOperator (bs); return *this; } |
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bool operator[] (int bitIndex) const { return bitset_[bitIndex]; } |
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friend BitSet operator| (const BitSet& bs1, const BitSet& bs2); |
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friend BitSet operator& (const BitSet& bs1, const BitSet& bs2); |
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friend BitSet operator^ (const BitSet& bs1, const BitSet& bs2); |
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friend bool operator== (const BitSet & bs1, const BitSet &bs2); |
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friend std::istream& operator>> ( std::istream&, BitSet& bs); |
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friend std::istream& operator>> ( std::istream&, const BitSet& bs); |
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friend std::ostream& operator<< ( std::ostream&, const BitSet& bs) ; |
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private: |
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void setBit(int bitIndex, bool value) { bitset_[bitIndex] = value; } |
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/** Sets the bits from the specified fromIndex(inclusive) to the specified toIndex(exclusive) to the specified value. */ |
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void setBits(int fromIndex, int toIndex, bool value) {} |
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void setBits(int fromIndex, int toIndex, bool value); |
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std::vector<char> bitset_; |
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}; |
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template<typename T> |
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struct logical_xor :public std::binary_function<T, T, bool> { |
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double operator()(T x, T y) { return x ^ y; } |
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}; |
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} |
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#endif |