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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2010 Tatsuhiro Tsujikawa
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#ifndef D_SOCKET_BUFFER_H
#define D_SOCKET_BUFFER_H
#include "common.h"
#include <string>
#include <deque>
#include <memory>
namespace aria2 {
class SocketCore;
struct ProgressUpdate {
virtual ~ProgressUpdate() {}
virtual void update(size_t length, bool complete) = 0;
};
class SocketBuffer {
private:
class BufEntry {
public:
BufEntry(std::unique_ptr<ProgressUpdate> progressUpdate)
: progressUpdate_(std::move(progressUpdate))
{
}
virtual ~BufEntry() {}
virtual ssize_t send(const std::shared_ptr<SocketCore>& socket,
size_t offset) = 0;
virtual bool final(size_t offset) const = 0;
virtual size_t getLength() const = 0;
virtual const unsigned char* getData() const = 0;
void progressUpdate(size_t length, bool complete)
{
if (progressUpdate_) {
progressUpdate_->update(length, complete);
}
}
private:
std::unique_ptr<ProgressUpdate> progressUpdate_;
};
class ByteArrayBufEntry : public BufEntry {
public:
ByteArrayBufEntry(unsigned char* bytes, size_t length,
std::unique_ptr<ProgressUpdate> progressUpdate);
virtual ~ByteArrayBufEntry();
virtual ssize_t send(const std::shared_ptr<SocketCore>& socket,
size_t offset) CXX11_OVERRIDE;
virtual bool final(size_t offset) const CXX11_OVERRIDE;
virtual size_t getLength() const CXX11_OVERRIDE;
virtual const unsigned char* getData() const CXX11_OVERRIDE;
private:
unsigned char* bytes_;
size_t length_;
};
class StringBufEntry : public BufEntry {
public:
StringBufEntry(std::string s,
std::unique_ptr<ProgressUpdate> progressUpdate);
virtual ssize_t send(const std::shared_ptr<SocketCore>& socket,
size_t offset) CXX11_OVERRIDE;
virtual bool final(size_t offset) const CXX11_OVERRIDE;
virtual size_t getLength() const CXX11_OVERRIDE;
virtual const unsigned char* getData() const CXX11_OVERRIDE;
private:
std::string str_;
};
std::shared_ptr<SocketCore> socket_;
std::deque<std::unique_ptr<BufEntry>> bufq_;
// Offset of data in bufq_[0]. SocketBuffer tries to send bufq_[0],
// but it cannot always send whole data. In this case, offset points
// to the data to be sent in the next send() call.
size_t offset_;
public:
SocketBuffer(std::shared_ptr<SocketCore> socket);
~SocketBuffer();
// Don't allow copying
SocketBuffer(const SocketBuffer&) = delete;
SocketBuffer& operator=(const SocketBuffer&) = delete;
// Feeds data pointed by bytes with length len into queue. This
// object gets ownership of bytes, so caller must not delete or
// later bytes after this call. This function doesn't send data. If
// progressUpdate is not null, its update() function will be called
// each time the data is sent. It will be deleted by this object. It
// can be null.
void pushBytes(unsigned char* bytes, size_t len,
std::unique_ptr<ProgressUpdate> progressUpdate = nullptr);
// Feeds data into queue. This function doesn't send data. If
// progressUpdate is not null, its update() function will be called
// each time the data is sent. It will be deleted by this object. It
// can be null.
void pushStr(std::string data,
std::unique_ptr<ProgressUpdate> progressUpdate = nullptr);
// Sends data in queue. Returns the number of bytes sent.
ssize_t send();
// Returns true if queue is empty.
bool sendBufferIsEmpty() const;
size_t getBufferEntrySize() const { return bufq_.size(); }
};
} // namespace aria2
#endif // D_SOCKET_BUFFER_H
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