Echo Writes Code

metadata.hpp

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#ifndef CRUCIBLE_BOBA_METADATA_HPP
#define CRUCIBLE_BOBA_METADATA_HPP

#include "crucible/boba/errors.hpp"

#include <cstddef>
#include <span>
#include <vector>

namespace crucible::boba::metadata {
  struct Header final {
    bool is_internal { false };

    std::uint32_t signature { 0 };

    std::uint32_t data_size { 0 };

    std::uint32_t user_data[2] = { 0, 0 };

    std::size_t offset { 0 };
  };

  class Schema final {
  public:
    struct Entry final {
      std::uint32_t signature { 0 };

      std::uint32_t metadata { 0 };
    };

    explicit Schema(Header const &header);

    auto get_underlying_header() const -> Header;

    auto get_full_header_count() const -> std::size_t;

    auto get_user_header_count() const -> std::size_t;

    auto get_header_size() const -> std::size_t;

    auto get_entry_count() const -> std::size_t;

    auto get_entry_size() const -> std::size_t;

  private:
    Header my_header {};

    std::vector<Entry> my_entries {};
  };

  class Container final {
  public:
    using IteratorType = std::vector<Header>::const_iterator;

    explicit Container(Schema const &schema);

    Container(Schema const &schema, std::vector<Header> const &headers);

    auto get_schema() const -> Schema;

    auto begin() const -> IteratorType;

    auto end() const -> IteratorType;

  private:
    Schema my_schema;

    std::vector<Header> my_headers {};
  };

  auto from_bytes(std::span<std::byte const> bytes) -> errors::BobaResult<Container>;
}

#endif // CRUCIBLE_BOBA_METADATA_HPP