hxinfcod.cpp

symbian 下的helix player源代码

	if (nBitLenActual==nBitLen)
    {
		bRetVal  = this->DecodeObj(Buffer, nBitLen, pObj);
    }

	delete [] Buffer;

    return bRetVal;
}


/////////////////////////////////////////////////////////////////////
BOOL  CHXInfoDecoder::HexDecodeObj(const char* szHex, IHXStreamableObj* pObj)
{
	if (szHex)
    {
		return this->HexDecodeObj(szHex,strlen(szHex),pObj);
    }
	return(FALSE);
}

/////////////////////////////////////////////////////////////////////
BOOL  CHXInfoDecoder::HexDecodeObj(const char* szHex, UINT32 nHexLen, IHXStreamableObj* pObj)
{
	UINT32 nBitLen  = nHexLen>>1; // unhexed length is 1/2 of hex'd length

	UCHAR* Buffer=new UCHAR[nBitLen];
	HX_ASSERT(Buffer!=NULL);
	if (Buffer==NULL)	return(FALSE);

    UINT32 nBitLenActual = CHXInfoDecoder::SetFromHex(szHex, Buffer, nHexLen);

	BOOL bRetVal = FALSE;
	if (nBitLenActual==nBitLen)
    {
		bRetVal  = this->DecodeObj(Buffer,nBitLen,pObj);
    }

	delete [] Buffer;

    return bRetVal;
}

/////////////////////////////////////////////////////////////////////
STDMETHODIMP_(UINT32) CHXInfoDecoder::ReadObj(IHXStreamableObj* pObj) 
{
	UINT32 nLen=this->GetOffset();
	if (pObj->ReadObjFromBits(this)==HXR_OK)
		return this->GetOffset()-nLen;

#if 0		
	// reading object
	this->Seek(nLen);
#endif
	return(0);
}

/////////////////////////////////////////////////////////////////////
STDMETHODIMP_(UINT32) CHXInfoDecoder::ReadUCHAR(UCHAR& nValue)
{
    UCHAR temp;
    memcpy(&temp, m_Buffer+m_nOffset, sizeof(temp)); /* Flawfinder: ignore */
    nValue = temp;
	m_nOffset += sizeof(temp);
    return sizeof(temp);
}



/////////////////////////////////////////////////////////////////////
STDMETHODIMP_(UINT32) CHXInfoDecoder::ReadUINT16(UINT16& nValue)
{
    UINT16 temp16;
    memcpy(&temp16, m_Buffer+m_nOffset, sizeof(temp16)); /* Flawfinder: ignore */
    nValue = WToHost(temp16);

	m_nOffset += sizeof(temp16);
    return sizeof(temp16);
}

/////////////////////////////////////////////////////////////////////
STDMETHODIMP_(UINT32) CHXInfoDecoder::ReadUINT32(UINT32& nValue)
{
    UINT32 temp32;
    memcpy(&temp32, m_Buffer+m_nOffset, sizeof(temp32)); /* Flawfinder: ignore */
    nValue = DwToHost(temp32);

	m_nOffset += sizeof(temp32);
    return sizeof(temp32);
}


/////////////////////////////////////////////////////////////////////
STDMETHODIMP_(UINT32) CHXInfoDecoder::ReadString(CHXString& strValue)
{
    UINT32 FieldLen = *(m_Buffer+m_nOffset++);

    char* pBuffer = strValue.GetBuffer((int)FieldLen);
    memcpy(pBuffer, m_Buffer+m_nOffset, (int)FieldLen); /* Flawfinder: ignore */
    pBuffer[FieldLen] = '\0';
    strValue.ReleaseBuffer();

	m_nOffset += FieldLen;

    return FieldLen+1;
}


/////////////////////////////////////////////////////////////////////
STDMETHODIMP_(UINT32) CHXInfoDecoder::ReadAndAllocCString(char*& pszValue)
{
    UINT32 FieldLen = *(m_Buffer+m_nOffset++);

    pszValue = new char[FieldLen+1];
    memcpy(pszValue, m_Buffer+m_nOffset, (int)FieldLen); /* Flawfinder: ignore */
    pszValue[FieldLen] = '\0';

	m_nOffset += FieldLen;

    return FieldLen+1;
}

/////////////////////////////////////////////////////////////////////

STDMETHODIMP_(UINT32) CHXInfoDecoder::ReadLargeString(CHXString& strValue)
{
    UINT16 FieldLen = 0;
    UINT32 nSize = ReadUINT16(FieldLen);

    char* pBuffer = strValue.GetBuffer(FieldLen);
    memcpy(pBuffer, m_Buffer+m_nOffset, FieldLen); /* Flawfinder: ignore */
    pBuffer[FieldLen] = '\0';
    strValue.ReleaseBuffer();

	m_nOffset += FieldLen;

    return nSize+FieldLen;
}


/////////////////////////////////////////////////////////////////////
STDMETHODIMP_(UINT32) CHXInfoDecoder::ReadAndAllocLargeCString(char*& pszValue)
{
    UINT16 FieldLen = 0;
    UINT32 nSize = ReadUINT16(FieldLen);

    pszValue = new char[FieldLen+1];
    memcpy(pszValue, m_Buffer+m_nOffset, FieldLen); /* Flawfinder: ignore */
    pszValue[FieldLen] = '\0';

	m_nOffset += FieldLen;

    return nSize+FieldLen;
}


/////////////////////////////////////////////////////////////////////
STDMETHODIMP_(UINT32) CHXInfoDecoder::ReadBuffer(char* szBuffer, UINT32 nSize)
{
    memcpy(szBuffer, m_Buffer+m_nOffset, (int)nSize); /* Flawfinder: ignore */
	m_nOffset += nSize;
    return nSize;
}

#if 0
/////////////////////////////////////////////////////////////////////
STDMETHODIMP_(UINT32) CHXInfoDecoder::ReadUTCTime(UTCTimeRep& TimeRep)
{
	UINT32	time, nSize;

	nSize = ReadUINT32(time);

	TimeRep.SetUTCTime(time);
	return(nSize);
}
#endif

/////////////////////////////////////////////////////////////////////
STDMETHODIMP CHXInfoDecoder::Seek(UINT32 nPos)
{
	if (nPos<=m_nDecodedLen)
    {
		m_nOffset = nPos;
    }
	return(HXR_OK);
}

/////////////////////////////////////////////////////////////////////
STDMETHODIMP CHXInfoDecoder::SkipForward(UINT32 nAmount)
{
	m_nOffset += nAmount;

	if (m_nOffset>m_nDecodedLen)
    {
		m_nOffset = m_nDecodedLen;
    }
	return(HXR_OK);
}

/////////////////////////////////////////////////////////////////////
STDMETHODIMP_(BOOL) CHXInfoDecoder::IsEndOfData()
{
	if (m_nDecodedLen<Perplex_ALIGNMENT)
	{
		return(TRUE);
	}

	if (m_nOffset>(m_nDecodedLen-Perplex_ALIGNMENT))
		return(TRUE);
	else
		return(FALSE);
}


/////////////////////////////////////////////////////////////////////////////
//
//	Function:
//
//		FromHexNibble()
//
//	Purpose:
//
//
//	Parameters:
//
//		char hexChar
//		Character representing a hex encoding of a nibble.
//
//	Return:
//
//		UCHAR
//		Actual value of the nibble encoded by hexChar.
//
UCHAR CHXInfoDecoder::FromHexNibble(char hexChar)
{
	UCHAR value = 0;
	if (hexChar >= '0' && hexChar <= '9')
	{
		value = hexChar - '0';
	}
	else if (hexChar >= 'A' && hexChar <= 'F')
	{
		value = hexChar - 'A' + 10;
	}
	else if (hexChar >= 'a' && hexChar <= 'f')
	{
		value = hexChar - 'a' + 10;
	}
#ifdef _DEBUG
	else
	{
		// Bad hex character!
		HX_ASSERT(FALSE);
	}
#endif

	return value;
}


/////////////////////////////////////////////////////////////////////////////
//
//	Function:
//
//		HXClientLicense::SetFromHex()
//
//	Purpose:
//
//		Sets items of the license key from a hexidecimal encoding of the
//		license key bits.
//
//	Parameters:
//
//		const char* hex
//		Pointer to a buffer that contains a hexidecimal encoding of the
//		license key.
//
//		UCHAR* Bits
//		Pointer to a buffer that will be filled on output with a bitwise
//		decoding of the license key.
//
//		UINT32 nSize
//		Size of the hex string on input
//
//	Return:
//
//		int
//		Size in bytes of decoded size!
//
//	Note:
//
// 		Hex representations of the License Key consist of the
// 		representation of the bits in human readable form in a
// 		HEX encoding. This basically uses a pointer to a memory
// 		buffer of charcters encoded as hex representing the bits.
// 		Valid characters are 0-9,A-F. Buffers out will be upper
// 		case letters, buffers in will be converted to upper case.
//
// 		These char's are hex encoding. They are never DBCS, the only
//		valid characters are 0-9,A-F
//
UINT32 CHXInfoDecoder::SetFromHex(const char* hex, UCHAR* Bits, UINT32 nSize)
{
	UINT32	ndxBits;
	UINT32	ndxHex = 0;
	UCHAR			nibble1;
	UCHAR			nibble2;
	UCHAR			byte;

	for (ndxBits = 0; ndxHex < nSize; ndxBits++)
	{
		nibble1 = FromHexNibble(hex[ndxHex]);
		nibble1 = nibble1 << 4;
		ndxHex++;
		nibble2 = FromHexNibble(hex[ndxHex]);
		byte = nibble1 | nibble2;
		ndxHex++;
		Bits[ndxBits] = byte;
	}
	return ndxBits;
}

/////////////////////////////////////////////////////////////////////////////
//
//	Function:
//
//		ToHexNibble()
//
//	Purpose:
//
//		Converts a nibble into the appropriate character for Hex encoding.
//
//	Parameters:
//
//		UCHAR hexValue
//		Value of the nibble.
//
//	Return:
//
//		char
//		Character representing the hex encoding of the nibble.
//
char CHXInfoEncoder::ToHexNibble(UCHAR hexValue)
{
	char hexChar = '0';

	if (hexValue <= 0x9)
	{
		hexChar = '0' + hexValue;
	}
	else if (hexValue >= 0xA && hexValue <= 0xF)
	{
		hexChar = 'A' + (hexValue - 10);
	}
#ifdef _DEBUG
	else
	{
		// Bad hex character!
		HX_ASSERT(FALSE);
	}
#endif

	return hexChar;
}

/////////////////////////////////////////////////////////////////////////////
//
//	Function:
//
//		DumpToHex()
//
//	Purpose:
//
//		Formats the license key in human readable hexadecimal encoding.
//
//	Parameters:
//
//		char* hex
//		Pointer to buffer to be filled with hexadecimal encoding of
//		license key
//
//	Return:
//
//		None.
//
void CHXInfoEncoder::DumpToHex(char* hex, UCHAR* Bits, UINT32	nSize)
{
	UINT32	ndxBits;
	UINT32	ndxHex = 0;
	UCHAR			nibble1;
	UCHAR			nibble2;
	UCHAR			byte;

	for (ndxBits = 0; ndxBits < nSize; ndxBits++)
	{
		byte = Bits[ndxBits];
		nibble1 = (byte & 0xF0) >> 4;
		nibble2 = (byte & 0x0F);

		hex[ndxHex] = ToHexNibble(nibble1);
		ndxHex++;
		hex[ndxHex] = ToHexNibble(nibble2);
		ndxHex++;
	}
	hex[ndxHex] = '\0';
}

/////////////////////////////////////////////////////////////////////////////
//
//	Function:
//
//		MapFromPerplex()
//
//	Purpose:
//
//		Converts appropriate characters for Perplex encoding into a ULONG32.
//
#ifdef _WIN16
extern char* zPerplexChars;
#else
// A copy of this is kept in in pnmisc\pub\win\pnmisc16.h.  If you change 
// this (which is very unlikely), then be sure to change it there.  
static const char zPerplexChars[] =
						{
							'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
							'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
							'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
							'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D',
							'E'
						};

static const char zDePerplexMap[] = 
{	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0,
	0,36,37,38,39,40,0,0,0,0,0,0,0,0,0,0,
	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	0,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,
	25,26,27,28,29,30,31,32,33,34,35,0,0,0,0,0,
	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
};

#endif /* _WIN16 */

UCHAR CHXInfoDecoder::MapFromPerplex(char Perplex)
{
    return zDePerplexMap[Perplex];
}

/////////////////////////////////////////////////////////////////////////////
//
//	Function:
//
//		MapToPerplex()
//
//	Purpose:
//
//		Converts a digit ordinal to the Perplex digit...
//
char CHXInfoEncoder::MapToPerplex(UCHAR Perplex)
{                                                  
	#ifdef _DEBUG
	#ifndef _WIN16
	// On win16, zPerplexChars is a char *, rather than an array, so this
	// doesn't work.
	int size_zPerplexChars  = sizeof(zPerplexChars); 
	int size_zPerplexChars0 = sizeof(zPerplexChars[0]);
	HX_ASSERT(Perplex < size_zPerplexChars/size_zPerplexChars0);
	#endif
	#endif
	return zPerplexChars[Perplex];
}

/////////////////////////////////////////////////////////////////////////////
//
//	Function:
//
//		FromPerplex()
//
//	Purpose:
//
//		Converts appropriate characters for Perplex encoding into a ULONG32.
//
ULONG32 CHXInfoDecoder::FromPerplex(const char* Perplex)
{
	ULONG32 value = 0;
	ULONG32 PerplexBase = 1;

	for (int n = 0; n < Perplex_PER_ULONG32; n++)
	{
		value += MapFromPerplex(Perplex[n]) * PerplexBase;
		PerplexBase *= Perplex_BASE;
	}

	// Convert to local byte order!
	value = DwToHost(value);