~drizzle-trunk/drizzle/development

/* Copyright (C) 2008 PrimeBase Technologies GmbH, Germany

 *

 * PrimeBase Media Stream for MySQL

 *

 * 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 St, Fifth Floor, Boston, MA 02110-1301 USA

 *

 * Original author: Paul McCullagh (H&G2JCtL)

 * Continued development: Barry Leslie

 *

 * 2007-05-24

 *

 * CORE SYSTEM:

 * Basic file I/O.

 *

 */

#ifndef __CSSOCKET_H__

#define __CSSOCKET_H__

#include <stdio.h>

#include "CSDefs.h"

#include "CSPath.h"

#include "CSException.h"

#include "CSMemory.h"

#include "CSMutex.h"

class CSOutputStream;

class CSInputStream;

#define CS_SOCKET_ADDRESS_SIZE		300

/* This is only required if you do

 * not use an output buffer stream!

 */

//#define CS_USE_OUTPUT_BUFFER

#ifdef CS_USE_OUTPUT_BUFFER

#ifdef DEBUG

#define CS_OUTPUT_BUFFER_SIZE		80

#define CS_MIN_WRITE_SIZE			40

#else

#define CS_OUTPUT_BUFFER_SIZE		(4*1024)

#define CS_MIN_WRITE_SIZE			(1500)

#endif

#endif

class CSSocket : public CSRefObject {

public:

	CSSocket(): iHandle(-1), iHost(NULL), iService(NULL), iIdentity(NULL), iPort(0), iTimeout(0) {

#ifdef CS_USE_OUTPUT_BUFFER

	iDataLen = 0;

#endif

	}

	virtual ~CSSocket() {

		close();

	}

	void setTimeout(uint32_t milli_sec);

	CSOutputStream *getOutputStream();

	CSInputStream *getInputStream();

	virtual void formatAddress(size_t size, char *address);

	/*

	 * Publish a listener:

	 */

	virtual void publish(char *service, int default_port);

	/*

	 * Accept a connection from a listening socket:

	 */

	virtual void open(CSSocket *listener);

	/*

	 * Connect to a listening socket.

	 */

	virtual void open(char *address, int default_port);

	/*

	 * Close the socket.

	 */

	virtual void close();

	/*

	 * Read at least one byte from the socket.

	 * This function returns 0 on EOF.

	 * If the function returns at least

	 * one byte, then you must call the function

	 * again, there may be more data available.

	 *

	 * Note: Errors on the socket do not cause

	 * an exception!

	 */

	virtual size_t read(void *data, size_t size);

	/*

	 * Returns -1 on EOF!

	 * Otherwize it returns a character value >= 0

	 * Just like read, error on the socket do

	 * not throw an exception.

	 */

	virtual int read();

	/*

	 * Look at the next character in the file without

	 * taking from the input.

	 */

	virtual int peek();

	/*

	 * Write the given number of bytes.

	 * Throws IOException if an error occurs.

	 */

	virtual void write(const  void *data, size_t size);

	/*

	 * Write a character to the file.

	 */

	virtual void write(char ch);

	/*

	 * Flush the data written.

	 */

	virtual void flush();

	virtual const char *identify();

	static void initSockets();

	static CSSocket	*newSocket();

private:

	void throwError(const char *func, const char *file, int line, char *address, int err);

	void throwError(const char *func, const char *file, int line, int err);

	void setNoDelay();

	void setNonBlocking();

	void setBlocking();

	void openInternal();

	void writeBlock(const void *data, size_t len);

	int timeoutRead(CSThread *self, void *buffer, size_t length);

	int			iHandle;

	char		*iHost;

	char		*iService;

	char		*iIdentity;

	int			iPort;

	uint32_t	iTimeout;

#ifdef CS_USE_OUTPUT_BUFFER

	char	iOutputBuffer[CS_OUTPUT_BUFFER_SIZE];

	size_t	iDataLen;

#endif

};

#endif