/*
 * Copyright (C) 2025 Fastly, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef READWRITE_H
#define READWRITE_H

#include <QByteArray>
#include <boost/signals2.hpp>

class ReadWrite
{
public:
	virtual ~ReadWrite() = default;

	// size < 0 means default read size
	// returns buffer of bytes read. null buffer means error. empty means end
	virtual QByteArray read(int size = -1) = 0;

	// returns amount accepted, or -1 for error
	virtual int write(const QByteArray &buf) = 0;

	// returns errno of latest operation
	virtual int errorCondition() const = 0;

	boost::signals2::signal<void()> readReady;
	boost::signals2::signal<void()> writeReady;
};

#endif
