(Change Ascii code to Hex code ) and (Change to Ascii value)

Change Ascii code to Hex code

Make_Ascii2Hex(_In_ CONST TCHAR *pData, _In_ unsigned int nLen, _Out_ BYTE *pOutputData, _Out_ DWORD *pRspSize)
{
	WORD i = 0, j = 0, k = 0, ret = 0;
	WORD hex_data1 = 0;
	WORD hex_data2 = 0;
	WORD hex_data3 = 0;

	TRY
	{

		for (i = 0; i < nLen; i++)
		{
			if (pData[i] != 0x20)
			{
				if (j == 0)
				{
					hex_data1 = byCode2AsciiValue(pData[i]) << 4;
					j++;
				}
				else
				{
					hex_data2 = byCode2AsciiValue(pData[i]);
					hex_data3 = hex_data1 | hex_data2;
					*pOutputData++ = (BYTE)hex_data3;

					hex_data1 = 0;
					hex_data2 = 0;
					hex_data3 = 0;
					j = 0;
					k++;
				}
			}
		}
	}
		CATCH_ALL(e)
	{
		ret = SUP300_EXCEPTION_ERROR;
	}
	END_CATCH_ALL

		*pRspSize = k;
		return (LastErrorCode = ret);
}

Change to Ascii value

 

byCode2AsciiValue(_In_ TCHAR cData)
{
	BYTE byAsciiValue;

	if (('0' <= cData) && (cData <= '9'))
	{
		byAsciiValue = cData - '0';
	}
	else if (('A' <= cData) && (cData <= 'F'))
	{
		byAsciiValue = (cData - 'A') + 10;
	}
	else if (('a' <= cData) && (cData <= 'f'))
	{
		byAsciiValue = (cData - 'a') + 10;
	}
	else
	{
		byAsciiValue = 0;
	}

	return byAsciiValue;
}