|| || || || || || || ||

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FilterOperations.h

Go to the documentation of this file.

#ifndef Impala_Util_FilterOperations_h
#define Impala_Util_FilterOperations_h

namespace Impala
{
namespace Util
{

bool*
MakeIntersection(bool* set1, bool* set2, int size)
{
    bool* result = new bool[size];
    for(int i=0 ; i<size ; ++i)
        result[i] = set1[i] && set2[i];
    return result;
}

bool*
MakeRelativeComplement(bool* set1, bool* set2, int size)
{
    bool* result = new bool[size];
    for(int i=0 ; i<size ; ++i)
        result[i] = set1[i] && !set2[i];
    return result;
}


bool*
MakeUnion(bool* set1, bool* set2, int size)
{
    bool* result = new bool[size];
    for(int i=0 ; i<size ; ++i)
        result[i] = set1[i] || set2[i];
    return result;
}

int
Count(bool* set, int size)
{
    int count=0;
    for(int i=0 ; i<size ; ++i)
        if(set[i])
            ++count;
    return count;
}

int
IndexOfNth(bool* set, int size, int n)
{
    int count=0;
    for(int i=0 ; i<size ; ++i)
        if(set[i])
        {
            if(count==n)
                return i;
            ++count;
        }
    return size;
}

bool
Equal(bool* set1, bool* set2, int length)
{
    for(int i=0 ; i<length ; ++i)
    {
        if(set1[i] != set2[i])
            return false;
    }
    return true;
}
    
} // namespace Util
} // namespace Impala

#endif

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