Exemplos de BigInteger::countNumberOfSetBits em C++ (Cpp)

Exemplo n.º 1

static void ensureMinimumNumBitsSet (BigInteger& chans, int minNumChans)
{
    int i = 0;

    while (chans.countNumberOfSetBits() < minNumChans)
        chans.setBit (i++);
}

Exemplo n.º 2

Arquivo: juce_Primes.cpp Projeto: EQ4/editor

    bool passesMillerRabin (const BigInteger& n, int iterations)
    {
        const BigInteger one (1), two (2);
        const BigInteger nMinusOne (n - one);

        BigInteger d (nMinusOne);
        const int s = d.findNextSetBit (0);
        d >>= s;

        BigInteger smallPrimes;
        int numBitsInSmallPrimes = 0;

        for (;;)
        {
            numBitsInSmallPrimes += 256;
            createSmallSieve (numBitsInSmallPrimes, smallPrimes);

            const int numPrimesFound = numBitsInSmallPrimes - smallPrimes.countNumberOfSetBits();

            if (numPrimesFound > iterations + 1)
                break;
        }

        int smallPrime = 2;

        while (--iterations >= 0)
        {
            smallPrime = smallPrimes.findNextClearBit (smallPrime + 1);

            BigInteger r (smallPrime);
            r.exponentModulo (d, n);

            if (r != one && r != nMinusOne)
            {
                for (int j = 0; j < s; ++j)
                {
                    r.exponentModulo (two, n);

                    if (r == nMinusOne)
                        break;
                }

                if (r != nMinusOne)
                    return false;
            }
        }

        return true;
    }