mirror of
https://github.com/DCC-EX/CommandStation-EX.git
synced 2024-12-23 21:01:25 +01:00
65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
#ifndef RingStream_h
|
|
#define RingStream_h
|
|
/*
|
|
* © 2020-2021 Chris Harlow
|
|
* All rights reserved.
|
|
*
|
|
* This file is part of DCC-EX CommandStation-EX
|
|
*
|
|
* This is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* It 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <Arduino.h>
|
|
#include "FSH.h"
|
|
|
|
class RingStream : public Print {
|
|
|
|
public:
|
|
RingStream( const uint16_t len);
|
|
static const int THIS_IS_A_RINGSTREAM=77;
|
|
virtual size_t write(uint8_t b);
|
|
|
|
// This availableForWrite function is subverted from its original intention so that a caller
|
|
// can destinguish between a normal stream and a RingStream.
|
|
// The Arduino compiler does not support runtime dynamic cast to perform
|
|
// an instranceOf check.
|
|
// This is necessary since the Print functions are mostly not virtual so
|
|
// we cant override the print(__FlashStringHelper *) function.
|
|
virtual int availableForWrite() override;
|
|
using Print::write;
|
|
size_t printFlash(const FSH * flashBuffer);
|
|
inline int read() { return read(1); };
|
|
inline int peek() { return read(0); };
|
|
int count();
|
|
int freeSpace();
|
|
void mark(uint8_t b);
|
|
bool commit();
|
|
uint8_t peekTargetMark();
|
|
void flush();
|
|
void info();
|
|
private:
|
|
int read(byte advance);
|
|
byte readRawByte(byte advance=1);
|
|
int _len;
|
|
int _pos_write;
|
|
int _pos_read;
|
|
bool _overflow;
|
|
int _mark;
|
|
int _count;
|
|
byte * _buffer;
|
|
char * _flashInsert;
|
|
};
|
|
|
|
#endif
|