ArduinoJson/src/ArduinoJson/Array/ArrayIterator.hpp

// ArduinoJson - https://arduinojson.org
// Copyright © 2014-2022, Benoit BLANCHON
// MIT License

#pragma once

#include <ArduinoJson/Variant/SlotFunctions.hpp>
#include <ArduinoJson/Variant/VariantRef.hpp>

namespace ARDUINOJSON_NAMESPACE {

class VariantPtr {
 public:
  VariantPtr(MemoryPool *pool, VariantData *data) : _variant(pool, data) {}

  VariantRef *operator->() {
    return &_variant;
  }

  VariantRef &operator*() {
    return _variant;
  }

 private:
  VariantRef _variant;
};

class ArrayIterator {
 public:
  ArrayIterator() : _slot(0) {}
  explicit ArrayIterator(MemoryPool *pool, VariantSlot *slot)
      : _pool(pool), _slot(slot) {}

  VariantRef operator*() const {
    return VariantRef(_pool, _slot->data());
  }
  VariantPtr operator->() {
    return VariantPtr(_pool, _slot->data());
  }

  bool operator==(const ArrayIterator &other) const {
    return _slot == other._slot;
  }

  bool operator!=(const ArrayIterator &other) const {
    return _slot != other._slot;
  }

  ArrayIterator &operator++() {
    _slot = _slot->next();
    return *this;
  }

  ArrayIterator &operator+=(size_t distance) {
    _slot = _slot->next(distance);
    return *this;
  }

  VariantSlot *internal() {
    return _slot;
  }

 private:
  MemoryPool *_pool;
  VariantSlot *_slot;
};

class VariantConstPtr {
 public:
  VariantConstPtr(const VariantData *data) : _variant(data) {}

  VariantConstRef *operator->() {
    return &_variant;
  }

  VariantConstRef &operator*() {
    return _variant;
  }

 private:
  VariantConstRef _variant;
};

class ArrayConstRefIterator {
 public:
  ArrayConstRefIterator() : _slot(0) {}
  explicit ArrayConstRefIterator(const VariantSlot *slot) : _slot(slot) {}

  VariantConstRef operator*() const {
    return VariantConstRef(_slot->data());
  }
  VariantConstPtr operator->() {
    return VariantConstPtr(_slot->data());
  }

  bool operator==(const ArrayConstRefIterator &other) const {
    return _slot == other._slot;
  }

  bool operator!=(const ArrayConstRefIterator &other) const {
    return _slot != other._slot;
  }

  ArrayConstRefIterator &operator++() {
    _slot = _slot->next();
    return *this;
  }

  ArrayConstRefIterator &operator+=(size_t distance) {
    _slot = _slot->next(distance);
    return *this;
  }

  const VariantSlot *internal() {
    return _slot;
  }

 private:
  const VariantSlot *_slot;
};
}  // namespace ARDUINOJSON_NAMESPACE