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/*
This file is part of Android File Transfer For Linux.
Copyright (C) 2015-2020 Vladimir Menshakov
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef AFTL_MTP_PTP_BYTEARRAYOBJECTSTREAM_H
#define AFTL_MTP_PTP_BYTEARRAYOBJECTSTREAM_H
#include <mtp/ptp/IObjectStream.h>
#include <mtp/ByteArray.h>
namespace mtp
{
class ByteArrayObjectInputStream final: public IObjectInputStream, public CancellableStream //! stream constructed from \ref ByteArray data
{
ByteArray _data;
size_t _offset;
public:
ByteArrayObjectInputStream(const ByteArray & data) noexcept: _data(data), _offset(0) { }
ByteArrayObjectInputStream(ByteArray && data) noexcept: _data(data), _offset(0) { }
const ByteArray &GetData() const
{ return _data; }
virtual u64 GetSize() const
{ return _data.size(); }
virtual size_t Read(u8 *data, size_t size)
{
CheckCancelled();
size_t n = std::min(size, _data.size() - _offset);
std::copy(_data.data() + _offset, _data.data() + _offset + n, data);
_offset += n;
return n;
}
};
DECLARE_PTR(ByteArrayObjectInputStream);
class ByteArrayObjectOutputStream final: public IObjectOutputStream, public CancellableStream //! stream inserting into \ref ByteArray
{
ByteArray _data;
public:
ByteArrayObjectOutputStream(): _data() { }
const ByteArray &GetData() const
{ return _data; }
ByteArray &GetData()
{ return _data; }
size_t Write(const u8 *data, size_t size) override
{
CheckCancelled();
std::copy(data, data + size, std::back_inserter(_data));
return size;
}
};
DECLARE_PTR(ByteArrayObjectOutputStream);
class FixedSizeByteArrayObjectOutputStream final: public IObjectOutputStream, public CancellableStream //! stream writing into fixed size \ref ByteArray
{
ByteArray _data;
size_t _offset;
public:
FixedSizeByteArrayObjectOutputStream(size_t size): _data(size), _offset(0) { }
const ByteArray &GetData() const
{ return _data; }
size_t Write(const u8 *data, size_t size) override
{
CheckCancelled();
size_t n = std::min(size, _data.size() - _offset);
std::copy(data, data + n, _data.data() + _offset);
_offset += n;
return n;
}
};
DECLARE_PTR(FixedSizeByteArrayObjectOutputStream);
}
#endif /* BYTEARRAYOBJECTSTREAM_H */
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