Base64.hpp 1.9 KB

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  1. /*
  2. * Author: Patrick-Christopher Mattulat
  3. * Company: Lynar Studios
  4. * E-Mail: webmaster@lynarstudios.com
  5. * Created: 2022-01-03
  6. * Changed: 2024-05-31
  7. *
  8. * */
  9. #ifndef LS_STD_BASE64_HPP
  10. #define LS_STD_BASE64_HPP
  11. #include <ls-std/core/definition.hpp>
  12. #include <ls-std/core/interface/IEncoding.hpp>
  13. #include <string_view>
  14. #include <unordered_map>
  15. #include <vector>
  16. namespace ls::std::encoding
  17. {
  18. ls_std_class Base64 final : public core::interface_type::IEncoding
  19. {
  20. public:
  21. Base64();
  22. ~Base64() noexcept override;
  23. // implementation
  24. [[nodiscard]] ::std::string encode(const ::std::string &_sequence) override;
  25. [[nodiscard]] ::std::string decode(const ::std::string &_sequence) override;
  26. private:
  27. [[nodiscard]] static ::std::string _applyEndingRule(::std::string _encodedString, size_t _sequenceSize);
  28. [[nodiscard]] static ::std::string _decodeByteQuadruple(::std::string_view _quadruple);
  29. [[nodiscard]] static ::std::string _encodeByteTriple(::std::string_view _byteTriple);
  30. [[nodiscard]] static uint32_t _extractBitSequence(uint32_t _bitMask, uint32_t _bitStorage);
  31. [[nodiscard]] static uint32_t _generateBitMask(uint32_t _maskValue, uint8_t _shiftValue);
  32. [[nodiscard]] static ::std::unordered_map<char, uint8_t> _getDecodingMap();
  33. [[nodiscard]] static ::std::unordered_map<uint8_t, char> _getEncodingMap();
  34. [[nodiscard]] static ::std::string_view _getNextByteQuadruple(::std::string_view _sequence, size_t _index);
  35. [[nodiscard]] static ::std::string_view _getNextByteTriple(::std::string_view _sequence, size_t _index);
  36. static void _mergeBitSequence(uint32_t &_bitStorage, const uint32_t &_bitMask);
  37. [[nodiscard]] static uint32_t _toDecodingBitStorage(::std::string_view _quadruple);
  38. [[nodiscard]] static uint32_t _toEncodingBitStorage(::std::string_view _triple);
  39. };
  40. }
  41. #endif