//+------------------------------------------------------------------+
//|                                                          Str.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_HASH_GENERIC_STR_STR_MQH
#define FASTCOLLECTIONSBYLEO_COLHASH_HASH_GENERIC_STR_STR_MQH

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
#include <TSN/Tables/H/XXH64/XSTR.mqh>
#include "..\\Def.mqh"

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
namespace TSN
{
//+------------------------------------------------------------------+
//| String FNV1A64                                                   |
//+------------------------------------------------------------------+
class CGenericHash_string : public CGenericHash_eq_simple<string>
 {
public:
                     CGenericHash_string(void) {}
                    ~CGenericHash_string(void) {}

  //---
  static   ulong     Hash(const string& key)
   {
    ulong hash = 14695981039346656037ULL;
    const int len = StringLen(key);
    for(int i = 0; i < len; i++)
     {
      hash ^= (ulong)key[i];
      hash *= 1099511628211ULL;
     }
    return hash;
   }
 };

//+------------------------------------------------------------------+
// djb2
class CGenericHash_string_djb2 : public CGenericHash_eq_simple<string>
 {
public:
                     CGenericHash_string_djb2(void) {}
                    ~CGenericHash_string_djb2(void) {}

  //---
  static ulong       Hash(const string& key)
   {
    ulong hash = 5381;
    const int len = StringLen(key);
    for(int i = 0; i < len; i++)
      hash = ((hash << 5) + hash) + (ulong)key[i]; // hash * 33 + c
    return hash;

   }
 };



//+------------------------------------------------------------------+
// XXHash
class CGenericHash_string_xxhash64 : public CGenericHash_eq_simple<string>
 {
public:
                     CGenericHash_string_xxhash64(void) {}
                    ~CGenericHash_string_xxhash64(void) {}

  //---
  static   ulong     Hash(const string& key)
   {
    return TSN::XSTR::XXH64(key, StringLen(key), 0);
   }
 };
}
//+------------------------------------------------------------------+
#endif // FASTCOLLECTIONSBYLEO_COLHASH_HASH_GENERIC_STR_STR_MQH