// Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// This component and the accompanying materials are made available
// under the terms of "Eclipse Public License v1.0"
// which accompanies this distribution, and is available
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
// File contains internal classes for Ascii To Base64 converison
// and vice-versa.
//
//
/**
@file TConvBase64.h
@internalAll
@released
*/
#ifndef __TCONVBASE64_H__
#define __TCONVBASE64_H__
#include <e32base.h>
const TInt KMaxB64EncodedCharsPerLine = 60;
// Could be increased to 75 characters for every encoded line if KDecodeLineLength = 675.
// 60 was chosen to maintain existing behaviour.
const TInt8 KImcvLookUpStartOffset = 43;
const TUint8 KImcvConvEquals = '=';
const TInt8 AsciiToBase64[80]=
{
62, -1, -1, -1, 63, 52, 53, 54, 55, 56,
57, 58, 59, 60, 61, -1, -1, -1, 64, -1,
-1, -1, 0, 1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
18, 19, 20, 21, 22, 23, 24, 25, -1, -1,
-1, -1, -1, -1, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41,
42, 43, 44, 45, 46, 47, 48, 49, 50, 51
};
const TInt8 Base64ToAscii[65]=
{
65, 66, 67, 68, 69, 70, 71, 72, 73, 74,
75, 76, 77, 78, 79, 80, 81, 82, 83, 84,
85, 86, 87, 88, 89, 90, 97, 98, 99,100,
101,102,103,104,105,106,107,108,109,110,
111,112,113,114,115,116,117,118,119,120,
121,122, 48, 49, 50, 51, 52, 53, 54, 55,
56, 57, 43, 47, 61
};
/**
Base64 encoding and decoding class.
@internalAll
@released
*/
class TBase64
{
private:
/**
enum base64 coding defines
*/
enum
{
/** Padding characters */
EPadChar = 64
};
/**
enum for EMaskValues
*/
enum EMaskValues
{
/** Mask Six bits */
ESixBitMask = 0x3F,
/** Mask Eight bits */
EEightBitMask = 0xFF
};
/**
enum for EMaskShiftValues
*/
enum EMaskShiftValues
{
/** enum for 6 */
ESix = 6,
/** enum for 4 */
EFour = 4,
/** enum for 2 */
ETwo = 2,
/** enum for 0 */
EZero = 0
};
public:
IMPORT_C TBase64();
IMPORT_C TInt Encode( const TDesC8& aSrcString, TDes8& rDestString);
IMPORT_C TBool Decode( const TDesC8& aSrcString, TDes8& rDestString);
IMPORT_C TInt PortableEncode(const TDesC8& aSrcString, TDes8& aDestString, TInt aLineLength=-1);
private:
TInt iShiftStored;
TInt iMaskShiftStored;
};
#endif // __TCONVBASE64_H__