superdev7788

import os
import hmac
import hashlib
import struct
import base64
from typing import bytes as Bytes, Tuple, List
import time
import secrets

class SimpleBcrypt:

superdev7788

import struct
from typing import List, bytes as Bytes

class SHA256:
    """
    A complete implementation of SHA-256 hash algorithm.
    
    This implementation is for educational purposes and to understand
    the inner workings of SHA-256. For production use, always use
    the hashlib library which is optimized and thoroughly tested.

superdev7788

import struct
import math


class SimpleMD5:
    def __init__(self):
        # MD5 constants
        self.h = [0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476]

        # Pre-computed sine values for MD5 rounds

superdev7788

class EventBus:
    def __init__(self):
        # A dictionary to store event types and their listener functions
        # key: event_type (string), value: list of listener functions
        self.listeners = {}

    def on(self, event_type, listener):
        """Registers a listener for a specific event type."""
        if event_type not in self.listeners:
            self.listeners[event_type] = []

superdev7788

class Broker:
    def __init__(self):
        # A dictionary to store topics and their subscribers
        # key: topic (string), value: set of subscriber callback functions
        self.subscribers = {}

    def subscribe(self, topic, callback):
        """Adds a new subscriber to a topic."""
        # If the topic doesn't exist, create an empty set for it
        if topic not in self.subscribers:

superdev7788

import random
from typing import Optional, Any, List, Tuple


class SkipListNode:
    """Node in the skip list containing key-value pair and forward pointers"""

    def __init__(self, key: Any, value: Any, level: int):
        self.key = key
        self.value = value