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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: 14 нояб. 2017 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_IOUTSTREAM_H_
#define LSP_PLUG_IN_IO_IOUTSTREAM_H_
#include <lsp-plug.in/runtime/version.h>
#include <lsp-plug.in/common/types.h>
#include <lsp-plug.in/common/status.h>
namespace lsp
{
namespace io
{
class IOutStream
{
private:
IOutStream & operator = (const IOutStream &);
protected:
status_t nErrorCode;
protected:
inline status_t set_error(status_t error) { return nErrorCode = error; }
public:
explicit IOutStream();
virtual ~IOutStream();
public:
/** Get last I/O error code
*
* @return last I/O error code
*/
inline status_t last_error() const { return nErrorCode; };
/** The current read position
*
* @return current read position or error code
*/
virtual wssize_t position();
/** Write the data to output stream.
* The implementation should write the most possible amount
* of bytes before exit. Such behaviour will simplify the caller's
* implementation.
*
* @param buf buffer to write
* @param count number of bytes
* @return number of bytes actually written or negative error code
*/
virtual ssize_t write(const void *buf, size_t count);
/**
* Write a single byte to underlying storage
* @param b byte to write
* @return number of bytes actually written or negative error code
*/
virtual ssize_t writeb(int v);
/** Seek the stream to the specified position from the beginning
*
* @param position the specified position
* @return real position or negative value on error
*/
virtual wssize_t seek(wsize_t position);
/**
* Flush buffers to underlying storage
* @return status of operation
*/
virtual status_t flush();
/** Close the clip data stream
*
* @return status of operation
*/
virtual status_t close();
};
} /* namespace ws */
} /* namespace lsp */
#endif /* LSP_PLUG_IN_IO_IOUTSTREAM_H_ */
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