#include <cstddef>
#include <cassert>
#include <vector>
#include <boost/array.hpp>

typedef unsigned UINT;
typedef unsigned char BYTE;

std::size_t const DATA_SIZE = 6;

struct Data
{
    UINT a;
    BYTE b;
    BYTE c;
    BYTE d;

    Data() : a(), b(), c(), d() { }

    Data(boost::array<BYTE, DATA_SIZE> const& data)
      : a(data[0] << 16 | data[1] << 8 | data[2]),
        b(data[3]),
        c(data[4]),
        d(data[5])
    { }
};

inline bool operator ==(Data const& lhs, Data const& rhs)
{
    return lhs.a == rhs.a && lhs.b == rhs.b && lhs.c == rhs.c && lhs.d == rhs.d;
}

int main()
{
    boost::array<boost::array<BYTE, DATA_SIZE>, 2> const source =
    {{
        {{ 0x01, 0xfe, 0xaa, 0x01, 0xcc, 0x13 }},
        {{ 0x02, 0xa1, 0x02, 0xbb, 0x02, 0xdd }}
    }};

    std::vector<Data> data_list(source.begin(), source.end());

    assert(data_list[0] == Data(source[0]));
    assert(data_list[1] == Data(source[1]));
}