Method read

src/streams.h:280–296

    int GetVersion() const       { return nVersion; }

    void read(Span<value_type> dst)
    {
        if (dst.size() == 0) return;

        // Read from the beginning of the buffer
        auto next_read_pos{CheckedAdd(m_read_pos, dst.size())};
        if (!next_read_pos.has_value() || next_read_pos.value() > vch.size()) {
            throw std::ios_base::failure("CDataStream::read(): end of data");
        }
        memcpy(dst.data(), &vch[m_read_pos], dst.size());
        if (next_read_pos.value() == vch.size()) {
            m_read_pos = 0;
            vch.clear();
            return;
        }
        m_read_pos = next_read_pos.value();
    }

    void ignore(size_t num_ignore)
    {