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