#ifndef PL_BASE64_HH

#define PL_BASE64_HH

#include <qpdf/Pipeline.hh>

class Pl_Base64 final: public Pipeline

{

  public:

    enum action_e { a_encode, a_decode };

    Pl_Base64(char const* identifier, Pipeline* next, action_e);

    ~Pl_Base64() final = default;

    void write(unsigned char const* buf, size_t len) final;

    void finish() final;

    static std::string encode(std::string_view data);

    static std::string decode(std::string_view data);

  private:

    void decode_internal(std::string_view data);

    void encode_internal(std::string_view data);

    void flush_decode();

    void flush_encode();

    void reset();

    action_e action;

    unsigned char buf[4]{0, 0, 0, 0};

    size_t pos{0};

    std::string in_buffer;

    std::string out_buffer;

    bool end_of_data{false};

};

#endif // PL_BASE64_HH