FiltrationValue.h

/*    This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
 *    See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
 *    Author(s):       Clément Maria
 *
 *    Copyright (C) 2014 Inria
 *
 *    Modification(s):
 *      - 2024/08 Hannah Schreiber: Update of the concept after several additions to the Simplex tree.
 *      - YYYY/MM Author: Description of the modification
 */

struct FiltrationValue {
  FiltrationValue();
  explicit FiltrationValue(Gudhi::simplex_tree::empty_filtration_value_t e);
 
  // only for default ordering of filtration_vect_ in initialize_filtration and for prune_above_filtration
  friend bool operator<(const FiltrationValue& f1, const FiltrationValue& f2);
  friend bool operator==(const FiltrationValue& f1, const FiltrationValue& f2);
  
  friend FiltrationValue operator-(const FiltrationValue& f);

  friend bool is_positive_infinity(const FiltrationValue& f);

  friend bool unify_lifetimes(FiltrationValue& f1, const FiltrationValue& f2);

  friend bool intersect_lifetimes(FiltrationValue& f1, const FiltrationValue& f2);

  friend char* serialize_value_to_char_buffer(const FiltrationValue& value, char* start);

  friend const char* deserialize_value_from_char_buffer(FiltrationValue& value, const char* start);

  friend std::size_t get_serialization_size_of(const FiltrationValue& value);

  friend std::ostream& operator<<(std::ostream& os, const FiltrationValue& fil);

  friend std::istream& operator>>(std::istream& os, FiltrationValue& fil);
};