base64.h

这是从开源项目中分离出来的base64编码例子。

/** \file Base64.h
 **	\date  2004-02-13
 **	\author [e-mail]
**/
/*
Copyright (C) 2004-2006  Anders Hedstrom

This library is made available under the terms of the GNU GPL.

If you would like to use this library in a closed-source application,
a separate license agreement is available. For information about 
the closed-source license agreement for the C++ sockets library,
please visit http://www.alhem.net/Sockets/license.html and/or
email [e-mail].

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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
#ifndef _BASE64_H
#define _BASE64_H

#ifdef _WIN32
#pragma warning(disable:4514)
#endif

#include "StdAfx.h"
#include <stdio.h>
#include <string>

/** \defgroup util Utilities */

/** Base64 encode/decode. 
	\ingroup util */
class Base64
{
public:
	static inline bool is_base64(unsigned char c) {
		return (isalnum(c) || (c == '+') || (c == '/'));};
	std::string base64_encode(unsigned char const* , unsigned int len);
	std::string base64_encode(std::string const& s);
	std::string base64_decode(unsigned char const* , unsigned int len);
	std::string base64_decode(std::string const& s);
};

#endif // _BASE64_H