/** 
 * @file llbase64.cpp
 * @brief Wrapper for apr base64 encoding that returns a std::string
 * @author James Cook
 *
 * $LicenseInfo:firstyear=2007&license=viewergpl$
 * 
 * Copyright (c) 2007-2008, Linden Research, Inc.
 * 
 * Second Life Viewer Source Code
 * The source code in this file ("Source Code") is provided by Linden Lab
 * to you under the terms of the GNU General Public License, version 2.0
 * ("GPL"), unless you have obtained a separate licensing agreement
 * ("Other License"), formally executed by you and Linden Lab.  Terms of
 * the GPL can be found in doc/GPL-license.txt in this distribution, or
 * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
 * 
 * There are special exceptions to the terms and conditions of the GPL as
 * it is applied to this Source Code. View the full text of the exception
 * in the file doc/FLOSS-exception.txt in this software distribution, or
 * online at http://secondlifegrid.net/programs/open_source/licensing/flossexception
 * 
 * By copying, modifying or distributing this software, you acknowledge
 * that you have read and understood your obligations described above,
 * and agree to abide by those obligations.
 * 
 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
 * COMPLETENESS OR PERFORMANCE.
 * $/LicenseInfo$
 */

#include "linden_common.h"

#include "llbase64.h"

#include <string>

#include "apr_base64.h"


// static
std::string LLBase64::encode(const U8* input, size_t input_size)
{
	std::string output;
	if (input
		&& input_size > 0)
	{
		// Yes, it returns int.
		int b64_buffer_length = apr_base64_encode_len(input_size);
		char* b64_buffer = new char[b64_buffer_length];
		
		// This is faster than apr_base64_encode() if you know
		// you're not on an EBCDIC machine.  Also, the output is
		// null terminated, even though the documentation doesn't
		// specify.  See apr_base64.c for details. JC
		b64_buffer_length = apr_base64_encode_binary(
			b64_buffer,
			input,
			input_size);
		output.assign(b64_buffer);
		delete[] b64_buffer;
	}
	return output;
}

// reX: new function
bool LLBase64::decode(const std::string &input, unsigned char *buffer, size_t buffer_size)
{
   int len = apr_base64_decode_len(input.c_str());
   if (len != buffer_size || buffer_size <= 0 || buffer == 0 || input.empty())
      return false;

   apr_base64_decode_binary(buffer, input.c_str());

   return true;
}

// reX: new function
int LLBase64::decode_len(const std::string &input)
{
   return apr_base64_decode_len(input.c_str());
}
