fstream like interface for vector of uint8_t

BinaryVectorStream.hpp

#include <iostream>
#include <fstream>
#include <vector>
#include <cstdint>

class BinaryVectorStream {
private:
    std::vector<uint8_t>& data;
    size_t position;

public:

    BinaryVectorStream(std::vector<uint8_t>& vec) : data(vec), position(0) {
    }

    bool eof() const {
        return position >= data.size();
    }

    void write(const void* ptr, size_t size) {
        const uint8_t* bytes = static_cast<const uint8_t*> (ptr);
        data.insert(data.end(), bytes, bytes + size);
    }

    void read(void* ptr, size_t size) {
        if (position + size > data.size()) {
            throw std::runtime_error("End of file reached");
        }
        std::copy(data.begin() + position, data.begin() + position + size, static_cast<uint8_t*> (ptr));
        position += size;
    }

    void seekg(size_t pos) {
        if (pos > data.size()) {
            throw std::runtime_error("Invalid seek position");
        }
        position = pos;
    }

    size_t tellg() const {
        return position;
    }

    void close() {
        data.clear();
        position = 0;
    }
};