BitMaskArray.c

Go to the documentation of this file.

//------------------------------------------------------------------------------------------------
//------------------------------------------------------------------------------------------------
class SCR_BitMaskArray
{
    private ref array<int> m_BitMasks = null;
    
    //------------------------------------------------------------------------------------------------
    int GetNumBitMasks()
    {
        return m_BitMasks.Count();
    }
    
    //------------------------------------------------------------------------------------------------
    int GetBitMask(int index)
    {
        return m_BitMasks[index];
    }
    
    //------------------------------------------------------------------------------------------------
    void SetBitMask(int index, int bitMask)
    {
        if (index >= m_BitMasks.Count())
            return;
        
        m_BitMasks[index] = bitMask;
    }
    
    //------------------------------------------------------------------------------------------------
    bool GetEmpty()
    {
        for (int b = 0; b < m_BitMasks.Count(); b++)
        {
            int bitMask = m_BitMasks.Get(b);
            if (bitMask != 0)
                return false;
        }
        
        return true;
    }
    
    //------------------------------------------------------------------------------------------------
    bool GetBit(int index)
    {
        int bitMaskIndex = Math.Floor(index / 32);
        int bitInMask = 1 << (index % 32);
        
        int bitMask = m_BitMasks.Get(bitMaskIndex);
        
        if (bitMask & bitInMask)
            return true;
        else
            return false;
    }
    
    //------------------------------------------------------------------------------------------------
    void SetBit(int index, bool bSet)
    {
        int bitMaskIndex = Math.Floor(index / 32);
        int bitInMask = 1 << (index % 32);
        
        int bitMask = m_BitMasks.Get(bitMaskIndex);
        if (bSet)
            bitMask |= bitInMask;
        else
            bitMask &= ~bitInMask;
        m_BitMasks.Set(bitMaskIndex, bitMask);
    }
    
    //------------------------------------------------------------------------------------------------
    void SCR_BitMaskArray(int maxBits)
    {
        int numBitMasks = Math.Ceil(maxBits / 32);
        m_BitMasks = new array<int>;
        
        for (int b = 0; b < numBitMasks; b++)
            m_BitMasks.Insert(0);
    }
    
    //------------------------------------------------------------------------------------------------
    void ~SCR_BitMaskArray()
    {
    }
};