Class BitArrayView

czxing/src/main/cpp/zxing/src/BitArray.h:151–191

}

class BitArrayView
{
	const BitArray& bits;
	BitArray::Iterator cur;

public:
	BitArrayView(const BitArray& bits) : bits(bits), cur(bits.begin()) {}

	BitArrayView& skipBits(int n)
	{
		if (n > bits.size())
			throw std::out_of_range("BitArrayView::skipBits() out of range.");
		cur += n;
		return *this;
	}

	int peakBits(int n) const
	{
		assert(n <= 32);
		if (n > bits.size())
			throw std::out_of_range("BitArrayView::peakBits() out of range.");
		int res = 0;
		for (auto i = cur; n > 0; --n, i++)
			AppendBit(res, *i);
		return res;
	}

	int readBits(int n)
	{
		int res = peakBits(n);
		cur += n;
		return res;
	}

	int size() const
	{
		return narrow_cast<int>(bits.end() - cur);
	}

	explicit operator bool() const { return size(); }
};

} // ZXing