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/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-runtime-lib
* Created on: 19 авг. 2019 г.
*
* lsp-runtime-lib 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 3 of the License, or
* any later version.
*
* lsp-runtime-lib 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 lsp-runtime-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_IO_OUTMEMORYSTREAM_H_
#define LSP_PLUG_IN_IO_OUTMEMORYSTREAM_H_
#include <lsp-plug.in/runtime/version.h>
#include <lsp-plug.in/io/IOutStream.h>
namespace lsp
{
namespace io
{
class OutMemoryStream: public IOutStream
{
private:
uint8_t *pData;
size_t nSize;
size_t nCapacity;
size_t nQuantity;
size_t nPosition;
public:
explicit OutMemoryStream();
explicit OutMemoryStream(size_t quantity);
virtual ~OutMemoryStream();
public:
/**
* Get current contents of the memory buffer
* @return contents of the memory buffer, may be NULL if there is no data
*/
const uint8_t *data() const { return pData; }
/**
* Get current size of memory buffer
* @return size of memory buffer
*/
const size_t size() const { return nSize; }
/**
* Get capacity of the memory buffer
* @return capacity of the memory buffer
*/
const size_t capacity() const { return nCapacity; }
/**
* Get grow quantity of the memory buffer
* @return grow quantity
*/
const size_t quantity() const { return nQuantity; }
/**
* Release the internal buffer and return it's contents
* @return the pointer to data that should be free()'d after use
*/
uint8_t *release();
/**
* Drop internal stream data and reset position
*/
void drop();
/** Reset the size of memory buffer
*
*/
void clear();
/** Reduce the buffer size to the specified value if it was greater
* @return true if the size has been reduced
*/
bool reduce(size_t size);
/**
* Reserve amount of data
* @param amount amount of bytes to reserve
* @return status of operation
*/
status_t reserve(size_t amount);
public:
virtual ssize_t write(const void *buf, size_t count);
virtual ssize_t writeb(int v);
virtual wssize_t seek(wsize_t position);
virtual status_t flush();
virtual status_t close();
};
} /* namespace io */
} /* namespace lsp */
#endif /* LSP_PLUG_IN_IO_OUTMEMORYSTREAM_H_ */
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