/*

* Copyright (c) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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 

 @internalComponent

 @released

*/

#include "util.h"

#include "symbiantypes.h"

#include <fstream.h>

#include <iostream>

#include <sstream>

// openssl

#include <openssl/bio.h>

#include <openssl/evp.h>

#include <openssl/buffer.h>

#ifdef _WIN32

#include <windows.h>

#endif // _WIN32

static const TUint32 CrcTab32[256] =

     {

     0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,

     0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,

     0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,

     0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,

     0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,

     0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,

     0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,

     0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,

     0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,

     0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,

     0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,

     0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,

     0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,

     0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,

     0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,

     0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,

     0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,

     0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,

     0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,

     0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,

     0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,

     0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,

     0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,

     0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,

     0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,

     0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,

     0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,

     0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,

     0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,

     0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,

     0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,

     0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,

     0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,

     0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,

     0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,

     0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,

     0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,

     0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,

     0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,

     0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,

     0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,

     0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,

     0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,

     0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,

     0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,

     0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,

     0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,

     0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,

     0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,

     0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,

     0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,

     0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,

     0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,

     0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,

     0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,

     0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,

     0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,

     0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,

     0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,

     0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,

     0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,

     0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,

     0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,

     0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d

     };

namespace Util

{

/**

 * Converts wide char (unicode) string to multibyte string

 * This interface is provided so that we can have different implementation 

 * in windows and linux machine.

 * @param aSource 		string to be converted

 * @param aSourceLen	Source len. If this is -1 then it will calculate the length of the source.

 * @param aTarget		target location.

 * @param aTargetLen	Space in the target location.

 * @param aCodePage		Code page number (currently supported in windows only)

 * @return Number of bytes that make up the converted part of multibyte sequence. 

 * 			If aTarget is NULL then the function will return the size needed to store

 * 			the complete conversion of the source string.

 */

int ConvertWideCharToMultiByte(const wchar_t* aSource, int aSourceLen, char* aTarget, int aTargetLen, TUint32 aCodePage = 0);

/**

 * Converts multibyte string to wide char (unicode)

 * This interface is provided so that we can have different implementation 

 * in windows and linux machine.

 * @param aSource 		string to be converted

 * @param aSourceLen	Source len. If this is -1 then it will calculate the length of the source.

 * @param aTarget		target location.

 * @param aTargetLen	Space in the target location.

 * @param aCodePage		Code page number (currently supported in windows only)

 * @return Number of bytes that make up the converted part of widechar sequence. 

 * 			If aTarget is NULL then the function will return the size needed to store

 * 			the complete conversion of the source string.

 */

int ConvertMultiByteToWideChar(const char* aSource, int aSourceLen, wchar_t* aTarget, int aTargetLen, TUint32 aCodePage = 0);

}; // namespace Util

#ifdef __linux__ 

int Util::ConvertWideCharToMultiByte(const wchar_t* aSource, int /*aSourceLen*/, char* aTarget, int aTargetLen, TUint32 /*aCodePage*/)

	{

	int retValue = wcstombs(aTarget, aSource, aTargetLen);

	if (-1 == retValue)

		{

		return 0;

		}

	return retValue;

	}

int Util::ConvertMultiByteToWideChar(const char* aSource, int /*aSourceLen*/, wchar_t* aTarget, int aTargetLen, TUint32 /*aCodePage*/)

	{

	int retValue = mbstowcs(aTarget, aSource, aTargetLen);

	if (-1 == retValue)

		{

		return 0;

		}

	return retValue;

	}

#else

int Util::ConvertWideCharToMultiByte(const wchar_t* aSource, int aSourceLen, char* aTarget, int aTargetLen, TUint32 aCodePage)

	{

	if(0 == aCodePage)

		{

		aCodePage = CP_OEMCP;

		}

	return WideCharToMultiByte( aCodePage, 0, aSource, aSourceLen, aTarget, aTargetLen, NULL, NULL);

	}

int Util::ConvertMultiByteToWideChar(const char* aSource, int aSourceLen, wchar_t* aTarget, int aTargetLen, TUint32 aCodePage)

	{

	if(0 == aCodePage)

		{

		aCodePage = CP_OEMCP;

		}

	return MultiByteToWideChar( aCodePage, 0, aSource, aSourceLen, aTarget, aTargetLen);

	}

#endif // __linux__

std::wstring Util::string2wstring (const char* aNarrow)

	{

	std::string narrowStr(aNarrow);

	int max = ConvertMultiByteToWideChar(aNarrow, strlen(aNarrow),0,0);

	std::wstring reply;

	if (max > 0 )

		{

		wchar_t* buffer = new wchar_t [max];

		try

			{

			ConvertMultiByteToWideChar(aNarrow, strlen(aNarrow),buffer,max);

			reply = std::wstring (buffer, max);

			}

		catch (...)

			{

			}

		delete [] buffer;

		}

	return reply;

	}

DllExport int Util::WideCharToInteger(const wchar_t* aWideChar)

	{

	unsigned long int value=0;

	std::wstringstream str(aWideChar);

	str >> value;

	return value;

	}

TInt64 Util::WideCharToInt64(const wchar_t* aWideChar)

	{

	}

DllExport const std::wstring Util::IntegerToWideString(int aInt)

	{

	std::wstringstream wstream;

	wstream << aInt;

	return wstream.str();

	}

std::string Util::Base64Encode( const std::string& aBinaryData )

	{

	BIO *b64 = BIO_new(BIO_f_base64());

	BIO *mem = BIO_new(BIO_s_mem());

	mem = BIO_push(b64, mem);

	BIO_write(mem, aBinaryData.c_str(), aBinaryData.length());

	BIO_flush(b64);

	BUF_MEM *bptr;

	BIO_get_mem_ptr(mem, &bptr);

	std::string encodedString(bptr->data, bptr->length); 

	BIO_free_all(b64);

	return encodedString;

	}

std::string Util::Base64Decode( const std::string& aEncodedData )

	{

TUint32 Util::Crc32(const void* aPtr, TInt aLength)

	{

	const TUint8* p = (const TUint8*)aPtr;

	const TUint8* q = p + aLength;

	TUint32 crc = 0;

	while (p < q)

	 crc = (crc >> 8) ^ CrcTab32[(crc ^ *p++) & 0xff];

	return crc;

	}