RawBufferReader.hpp

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#ifndef BYTEME_RAW_BUFFER_READER_HPP
#define BYTEME_RAW_BUFFER_READER_HPP
 
#include <algorithm>
#include <cstddef>
 
#include "Reader.hpp"
 
namespace byteme {
 
class RawBufferReader final : public Reader {
public:
    RawBufferReader(const unsigned char* buffer, std::size_t length) : my_buffer(buffer), my_remaining(length) {}
 
public:
    std::size_t read(unsigned char* buffer, std::size_t n) {
        const auto to_copy = std::min(n, my_remaining);
        std::copy_n(my_buffer, to_copy, buffer);
        my_buffer += to_copy;
        my_remaining -= to_copy;
        return to_copy;
    }
 
private:
    const unsigned char* my_buffer;
    std::size_t my_remaining;
};
 
}
 
#endif