Function swap

deps/opencv/modules/core/src/matrix.cpp:54–83

namespace cv {

void swap( Mat& a, Mat& b )
{
    std::swap(a.flags, b.flags);
    std::swap(a.dims, b.dims);
    std::swap(a.rows, b.rows);
    std::swap(a.cols, b.cols);
    std::swap(a.data, b.data);
    std::swap(a.refcount, b.refcount);
    std::swap(a.datastart, b.datastart);
    std::swap(a.dataend, b.dataend);
    std::swap(a.datalimit, b.datalimit);
    std::swap(a.allocator, b.allocator);

    std::swap(a.size.p, b.size.p);
    std::swap(a.step.p, b.step.p);
    std::swap(a.step.buf[0], b.step.buf[0]);
    std::swap(a.step.buf[1], b.step.buf[1]);

    if( a.step.p == b.step.buf )
    {
        a.step.p = a.step.buf;
        a.size.p = &a.rows;
    }

    if( b.step.p == a.step.buf )
    {
        b.step.p = b.step.buf;
        b.size.p = &b.rows;
    }
}


static inline void setSize( Mat& m, int _dims, const int* _sz,