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/*
EEPROM.cpp - esp8266 EEPROM emulation
Copyright (c) 2014 Ivan Grokhotkov. All rights reserved.
This file is part of the esp8266 core for Arduino environment.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef EEPROM_h
#define EEPROM_h
#include <stddef.h>
#include <stdint.h>
#include <string.h>
class EEPROMClass {
public:
EEPROMClass(uint32_t sector);
EEPROMClass(void);
void begin(size_t size);
uint8_t read(int const address);
void write(int const address, uint8_t const val);
bool commit();
void end();
uint8_t * getDataPtr();
uint8_t const * getConstDataPtr() const;
template<typename T>
T &get(int const address, T &t) {
if (address < 0 || address + sizeof(T) > _size)
return t;
memcpy((uint8_t*) &t, _data + address, sizeof(T));
return t;
}
template<typename T>
const T &put(int const address, const T &t) {
if (address < 0 || address + sizeof(T) > _size)
return t;
if (memcmp(_data + address, (const uint8_t*)&t, sizeof(T)) != 0) {
_dirty = true;
memcpy(_data + address, (const uint8_t*)&t, sizeof(T));
}
return t;
}
size_t length() {return _size;}
uint8_t& operator[](int const address) {return getDataPtr()[address];}
uint8_t const & operator[](int const address) const {return getConstDataPtr()[address];}
protected:
uint32_t _sector;
uint8_t* _data;
size_t _size;
bool _dirty;
};
#if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_EEPROM)
extern EEPROMClass EEPROM;
#endif
#endif