cross-reference.hxx

#ifndef art__paperback__carousel__cross_reference_hxx_
#define art__paperback__carousel__cross_reference_hxx_
 
#include <art/paperback/types.hxx>
#include <art/paperback/forward.hxx>
 
#include <art/paperback/carousel/writer.hxx>
 
namespace Art::Paperback::Carousel
{
 
  /// Implements the COS cross-reference table.
  ///
  class cross_Reference
  {
  public:
    /// Constructor.
    ///
    cross_Reference();
 
    /// Constructor.
    ///
    cross_Reference(cross_Reference const&);
 
    /// Constructor.
    ///
    cross_Reference(cross_Reference&&);
 
    /// Destructor.
    ///
    ~cross_Reference() noexcept;
 
    /// Get the size of the cross-reference table.
    ///
    uint32_t
    size() const;
 
    /// Allocate a new object index.
    ///
    Identity
    allocate();
 
    /// Get the offset of a used entry.
    ///
    int64_t
    get_offset(Identity) const;
 
    /// Set the offset of a used entry.
    ///
    void
    set_offset(Identity, int64_t);
 
    /// Get the next available object identity.
    ///
    Identity
    next() const;
 
    /// Write the cross-reference to an output stream.
    ///
    void
    write(Writer&, bool);
 
    /// Clears the offsets of used entries.
    ///
    void
    clear_offsets();
 
    /// Assignment.
    ///
    cross_Reference&
    operator=(cross_Reference const&);
 
    /// Assignment.
    ///
    cross_Reference&
    operator=(cross_Reference&&);
 
  private:
    struct Free_entry;
    struct Used_entry;
 
    using Entry = variant<Free_entry, Used_entry>;
 
    /// Cross-reference table entries.
    ///
    map<Identity, Entry> _table;
 
  };
 
} // namespace Art::Paperback::Carousel
 
#endif