SimPHash/Src/Hash/Str/XXHash.mqh

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

#ifndef SIMPHASH_SRC_HASH_STR_XXHASH_MQH
#define SIMPHASH_SRC_HASH_STR_XXHASH_MQH


//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
#include "..\\Def.mqh"

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
namespace TSN
{
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
class CHashXXHash : public IHashGenerator
 {
private:
  ulong              m_seed;
public:
                     CHashXXHash(void) {}
                    ~CHashXXHash(void) {}

  //---
  bool               Init(CYmlNode& node) override final
   {
    m_seed = ulong(node["seed"].ToInt(123123ULL));
    return true;
   }

  //---
  ulong              Hash(const string& key) override final
   {
    return TSN::XSTR::XXH64(key, StringLen(key), m_seed);
   }

  //---
  void               AddIncludes(string& data) override final
   {
    data += "#include <TSN/Tables/AllHashes.mqh>\r\n";
   }

  //---
  void               BuildString(string& data) override final
   {
    data += "//---\r\n";
    data += "  const int len = StringLen(key);\r\n";
    data += "  ulong key_hash = TSN::XSTR::XXH64(key, len, " + string(m_seed) + "ULL);\r\n";
    data += "\r\n";
   }

 };
//+------------------------------------------------------------------+
}
//+------------------------------------------------------------------+
#endif // SIMPHASH_SRC_HASH_STR_XXHASH_MQH