//Chris Xiong 2022
//License: MPL-2.0
#include <cstdint>
#include <string>

class base64_encoder
{
private:
    static const char *b64c;
    uint8_t counter;
    uint8_t rem;
    std::string ret;
public:
    base64_encoder();
    void encode_data(const void *data, size_t len);
    std::string finalize();
};

class base64_decoder
{
private:
    static const uint8_t b64v[];
    size_t dlen;
    bool invalid;
    uint8_t rem;
    uint8_t counter;
    size_t bp;
    std::string s;
public:
    base64_decoder(std::string &&b);
    size_t decoded_length();
    size_t decode_data(const void *data, size_t len);
};