FastCollections-FastHashMap/Src/ColHash/HashMap/Main.mqh

//+------------------------------------------------------------------+
//|                                                         Main.mqh |
//|                                  Copyright 2026, Niquel Mendoza. |
//|                                            https://www.mql5.com/ |
//+------------------------------------------------------------------+
#property copyright "Copyright 2026, Niquel Mendoza."
#property link      "https://www.mql5.com/"
#property strict

#ifndef FASTCOLLECTIONSBYLEO_COLHASH_HASHMAP_MAIN_MQH
#define FASTCOLLECTIONSBYLEO_COLHASH_HASHMAP_MAIN_MQH

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
#include "..\\HashBases\\Main.mqh"


//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
#define CHashMapFastIterator(k, v) TSN::CHashMapFastIteratorInt<k, v, TSN::CGenericHash_##k>

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
namespace TSN
{
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
template <typename TKey, typename TValue, typename TBase>
struct CHashMapFastIteratorInt;

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
template <typename TKey, typename TValue>
struct CHashMapFastInternalPar
 {
  TKey               key;
  TValue             value;
  ulong              hash;
 };

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
template <typename TKey, typename TValue, typename TBase>
class CHashMapFastBase : public CFastHashTableBase<CHashMapFastInternalPar<TKey, TValue>, TKey, TBase>
 {
public:
                     CHashMapFastBase(int initial_size = 128) { Init(initial_size); }
                    ~CHashMapFastBase(void) {}

  //---
  bool               TryGet(const TKey& key, TValue& out) const;

  //---
  int                CopyTo(TKey& keys[],  TValue& values[]) const;

  //---
  CHashMapFastIteratorInt<TKey, TValue, TBase> BeginIteration();
 };



//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
template <typename TKey, typename TValue, typename TBase>
int CHashMapFastBase::CopyTo(TKey& keys[], TValue& values[]) const
 {
  ArrayResize(keys, m_count);
  ArrayResize(values, m_count);
  int out_idx = 0;

  for(int group = 0; group < m_num_groups; group++)
   {
    ulong occupied_mask = (m_meta[group] & MQLARTICLES_HASHMAP_MASK_HIGH_BIT) ^ MQLARTICLES_HASHMAP_MASK_HIGH_BIT;

    while(occupied_mask != 0)
     {
      const ulong flag = TSNTABLES_SWAR_64_DEJAR_SOLO_MINUS_SIG_BYTE(occupied_mask);
      const int slot = (group << 3) + TSNTABLES_SWAR_64_GET_BYTE(flag);

      keys[out_idx] = m_table[slot].key;
      values[out_idx] = m_table[slot].value;
      out_idx++;

      occupied_mask &= (occupied_mask - 1);
     }
   }

  return out_idx;
 }



//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
template <typename TKey, typename TValue, typename TBase>
bool CHashMapFastBase::TryGet(const TKey& key, TValue& out) const
 {
//---
  const int slot = Find(key);
  if(slot == -1)
    return false;
  out = m_table[slot].value;
  return true;
 }

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
template <typename TKey, typename TValue, typename TBase>
CHashMapFastIteratorInt<TKey, TValue, TBase> CHashMapFastBase::BeginIteration()
 {
  return CHashMapFastIteratorInt<TKey, TValue, TBase>(&this);
 }

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
template <typename TKey, typename TValue, typename TBase>
struct CHashMapFastIteratorInt : public CFastHashTableIteratorBase<CHashMapFastBase<TKey, TValue, TBase>, TKey>
 {
                     CHashMapFastIteratorInt(CHashMapFastBase<TKey, TValue, TBase>* ptr)
    :                CFastHashTableIteratorBase<CHashMapFastBase<TKey, TValue, TBase>, TKey>(ptr)
   {
   }
                     CHashMapFastIteratorInt() {}


  //---
  __forceinline TValue Val() const    { return m_ctx.m_table[m_current_slot].value; }
 };
}
//+------------------------------------------------------------------+
#endif // FASTCOLLECTIONSBYLEO_COLHASH_HASHMAP_MAIN_MQH