BitMask

A simple class used to handle unsigned integer bitmasks.

Functionality:

• static methods for construction
• copy constructor, assignment operator
• comparison operators
• bitwise operators

Details

• All operations take O(n) time, where n is number of unsigned ints used to store mask.
• Counting of bits begins from 0 from the right
• It is guaranteed that all bits to the left of the last significant bit are always zero

    BitMask m1 = BitMask::MakeOne(100); //00..01
    BitMask m2(m1);
    bool areSame = (m1 == m2); //true

    BitMask m3 = m1 << 30;
    BitMask m4 = BitMask::MakeAllZeros(100); //00..0
    m4.SetBitValue(30, 1);
    areSame = (m3 == m4); //true

    BitMask m5 = BitMask::MakeAllOnes(50); //11..1
    m5.SetBitValue(25, 0);
    BitMask m6 = ~m5;
    areSame = (m6 == (BitMask::MakeOne(50) << 25)); //true
    
    BitMask m7 = BitMask::MakeAllZeros(1000);
    m7.Invert();
    BitMask m8 = m7;
    m7.SetBitValue(0, 0);
    bool is7LargerThan8 = (m7 > m8); //false