/*
 * TrueRandom - A true random number generator for Arduino.
 * This is variant of original work originally implemented as:
 * https://code.google.com/archive/p/tinkerit/ https://github.com/Cathedrow/TrueRandom
 * Copyright (c) 2010 Peter Knight, Tinker.it! All rights reserved.
 * Now modified for the ESP8266
 */

#ifndef ESP8266TrueRandom_h
#define ESP8266TrueRandom_h

#include <Arduino.h>
#include <inttypes.h>

class ESP8266TrueRandomClass
{
  public:
	ICACHE_FLASH_ATTR ESP8266TrueRandomClass();
	ICACHE_FLASH_ATTR int rand();
	ICACHE_FLASH_ATTR long random();
	ICACHE_FLASH_ATTR long random(long howBig);
	ICACHE_FLASH_ATTR long random(long howsmall, long how);
	ICACHE_FLASH_ATTR int randomBit(void);
	ICACHE_FLASH_ATTR char randomByte(void);
	ICACHE_FLASH_ATTR void memfill(char* location, int size);
	ICACHE_FLASH_ATTR void mac(uint8_t* macLocation);
	ICACHE_FLASH_ATTR void uuid(uint8_t* uuidLocation);
	ICACHE_FLASH_ATTR String uuidToString(uint8_t* uuidLocation);
    bool useRNG;
  private:
    unsigned long lastYield;
    ICACHE_FLASH_ATTR int randomBitRaw(void);
    ICACHE_FLASH_ATTR int randomBitRaw2(void);
};
extern ESP8266TrueRandomClass ESP8266TrueRandom;
#endif