/* * Author: Patrick-Christopher Mattulat * Company: Lynar Studios * E-Mail: webmaster@lynarstudios.com * Created: 2022-01-03 * Changed: 2024-09-05 * * */ #ifndef LS_STD_BASE64_HPP #define LS_STD_BASE64_HPP #include <bitset> #include <cstdint> #include <ls-std/core/interface/IEncoding.hpp> #include <ls-std/os/dynamic-goal.hpp> #include <string_view> #include <unordered_map> #include <vector> namespace ls::std::encoding { class LS_STD_DYNAMIC_GOAL Base64 : public ls::std::core::interface_type::IEncoding { public: Base64(); ~Base64() noexcept override; // implementation [[nodiscard]] ::std::string encode(const ::std::string &_sequence) override; [[nodiscard]] ::std::string decode(const ::std::string &_sequence) override; private: [[nodiscard]] static ::std::string _applyEndingRule(::std::string _encodedString, size_t _sequenceSize); [[nodiscard]] static ::std::string _decodeByteQuadruple(::std::string_view _quadruple); [[nodiscard]] static ::std::string _encodeByteTriple(::std::string_view _byteTriple); [[nodiscard]] static uint32_t _extractBitSequence(uint32_t _bitMask, uint32_t _bitStorage); [[nodiscard]] static uint32_t _generateBitMask(uint32_t _maskValue, uint8_t _shiftValue); [[nodiscard]] static ::std::unordered_map<char, uint8_t> _getDecodingMap(); [[nodiscard]] static ::std::unordered_map<uint8_t, char> _getEncodingMap(); [[nodiscard]] static ::std::string_view _getNextByteQuadruple(::std::string_view _sequence, size_t _index); [[nodiscard]] static ::std::string_view _getNextByteTriple(::std::string_view _sequence, size_t _index); static void _mergeBitSequence(uint32_t &_bitStorage, const uint32_t &_bitMask); [[nodiscard]] static uint32_t _toDecodingBitStorage(::std::string_view _quadruple); [[nodiscard]] static uint32_t _toEncodingBitStorage(::std::string_view _triple); }; } #endif