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//+------------------------------------------------------------------+
//| EA31337 framework |
//| Copyright 2016-2020, 31337 Investments Ltd |
//| https://github.com/EA31337 |
//+------------------------------------------------------------------+
/*
* This file is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
// Prevents processing this includes file for the second time.
#ifndef DICT_ITERATOR_BASE_MQH
#define DICT_ITERATOR_BASE_MQH
#include "DictBase.mqh"
template <typename K, typename V>
class DictIteratorBase {
protected:
DictBase<K, V>* _dict;
int _hash;
unsigned int _slotIdx;
unsigned int _index;
public:
/**
* Constructor.
*/
DictIteratorBase() : _dict(NULL) {}
/**
* Constructor.
*/
DictIteratorBase(DictBase<K, V>& dict, unsigned int slotIdx)
: _dict(&dict), _hash(dict.GetHash()), _slotIdx(slotIdx), _index(0) {}
/**
* Copy constructor.
*/
DictIteratorBase(const DictIteratorBase& right)
: _dict(right._dict),
_hash(right._dict ? right._dict.GetHash() : 0),
_slotIdx(right._slotIdx),
_index(right._index) {}
/**
* Iterator incrementation operator.
*/
void operator++(void) {
// Going to the next slot.
++_slotIdx;
++_index;
DictSlot<K, V>* slot = _dict.GetSlot(_slotIdx);
// Iterating until we find valid, used slot.
while (slot != NULL && !slot.IsUsed()) {
slot = _dict.GetSlot(++_slotIdx);
}
if (!slot || !slot.IsValid()) {
// Invalidating iterator.
_dict = NULL;
}
}
bool HasKey() { return _dict.GetSlot(_slotIdx).HasKey(); }
K Key() { return _dict.GetMode() == DictModeList ? (K)_slotIdx : _dict.GetSlot(_slotIdx).key; }
string KeyAsString(bool includeQuotes = false) { return HasKey() ? JSON::ValueToString(Key(), includeQuotes) : ""; }
unsigned int Index() { return _index; }
V Value() { return _dict.GetSlot(_slotIdx).value; }
bool IsValid() { return _dict != NULL; }
};
template <typename K, typename V>
struct DictSlotsRef {
DictSlot<K, V> DictSlots[];
// Incremental index for dict operating in list mode.
unsigned int _list_index;
unsigned int _num_used;
DictSlotsRef() { _list_index = 0; _num_used = 0; }
};
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