LimitedMemoryStream.h

/****
 * Sming Framework Project - Open Source framework for high efficiency native ESP8266 development.
 * Created 2015 by Skurydin Alexey
 * http://github.com/anakod/Sming
 * All files of the Sming Core are provided under the LGPL v3 license.
 *
 * LimitedMemoryStream.h
 *
 ****/

#ifndef _SMING_CORE_DATA_STREAM_LIMITED_MEMORY_STREAM_H_
#define _SMING_CORE_DATA_STREAM_LIMITED_MEMORY_STREAM_H_

#include "ReadWriteStream.h"

class LimitedMemoryStream : public ReadWriteStream
{
public:
    LimitedMemoryStream(size_t length) : buffer(new uint8_t[length]), length(length)
    {
    }

    ~LimitedMemoryStream()
    {
        delete[] buffer;
    }

    //Use base class documentation
    StreamType getStreamType() const override
    {
        return eSST_Memory;
    }

    int available() override
    {
        return writePos - readPos;
    }

    uint16_t readMemoryBlock(char* data, int bufSize) override;

    //Use base class documentation
    bool seek(int len) override;

    size_t write(const uint8_t* buffer, size_t size) override;

    bool isFinished() override
    {
        return (readPos >= length);
    }

private:
    uint8_t* buffer = nullptr;
    size_t writePos = 0;
    size_t readPos = 0;
    size_t length = 0;
};

#endif /* _SMING_CORE_DATA_STREAM_LIMITED_MEMORY_STREAM_H_ */