dump an object's memory to a stream encoded in hex

memory_dump.hpp

#include <ios>
#include <ostream>

struct memory_dump_t
{
    typedef unsigned char byte;
    
    byte const * const address;
    std::size_t const length;
};

template <typename T>
memory_dump_t dump(T const& obj)
{
    return { &obj, sizeof(T) };
}

std::ostream& operator <<(std::ostream& stream, memory_dump_t const& mem_dump)
{
    auto original_flags = stream.flags();
    stream.setf(std::ios::hex, std::ios::basefield);
    {
        auto stream_ = stream << std::setw(2) << std::setfill('0');
        for (auto ptr = mem_dump.address; ptr < mem_dump.address + mem_dump.length; ++ptr)
            stream_ << &ptr;
    }
    stream.flags(original_flags);
    return stream;
}

/*
Usage example:

    MyObject foo;
    // ...
    std::cout << dump(foo) << std::endl;
*/