www.pudn.com > Example_BluetoothChat.rar > TBluetoothAttributeParser.cpp

/** 
* 
* @brief Definition of TBluetoothAttributeParser 
* 
* Copyright (c) EMCC Software Ltd 2003 
* @version 1.0 
*/ 
 
// System include 
#include  
 
// User include 
#include "BluetoothDefinitions.h" 
#include "BluetoothAttributeObserver.h" 
#include "TBluetoothAttributeParser.h" 
 
/** 
* Constructor 
* 
* Set observer and flag to indicate success / failure 
* 
* @param aObserver an Observer that will get called iff a value service & port are found 
* @param aContinueSearching flag set to indicate success / failure. 
* 
**/ 
TBluetoothAttributeParser::TBluetoothAttributeParser(MBluetoothAttributeObserver& aObserver, TBool& aContinueSearching) 
: iObserver(aObserver), 
  iContinueSearching(aContinueSearching) 
	{ 
	iProcessingState = EStartOfDesOne; 
	iFinished = EFalse; 
	} 
 
/** 
* VisitAttributeValueL 
* 
* Called for every member of the Data Element Sequence of this attribute. 
* Only interested in the RFCOMM and Port information 
* 
* An OS defined function 
* 
* @param aValue the attrubute's value 
* @param aType the type of data encapsulated by aValue 
**/ 
void TBluetoothAttributeParser::VisitAttributeValueL(CSdpAttrValue& aValue, TSdpElementType /*aType*/) 
	{ 
	switch ( iProcessingState ) 
		{ 
		case EStartOfDesOne: 
		case EStartOfDesTwo: 
		case EL2Cap: 
		case EEndOfDesTwo: 
		case EStartDesThree: 
			break; // check nothing 
 
		case ERFComm: 
			CompareRFCOMM( aValue ); 
			break; 
 
		case ERFCommPort: 
			GetPort( aValue ); 
			break; 
 
		case EEndOfDesThree: 
		case EEndOfDesOne: 
			break; // check nothing 
 
		default: // unexpected output -- panic 
			Panic(EBadAttributeValue); 
			break; 
		} 
 
	Next(); 
	} 
 
/** 
 * Called at the start of a list. OS Specified function 
 * 
 * @param aList the list your starting on 
 * @return none 
 */ 
void TBluetoothAttributeParser::StartListL(CSdpAttrValueList& /*aList*/) 
	{ 
	} 
 
/** 
 * Called at the end of list. OS Specified function 
 * 
 * @param none 
 * @return none 
 */ 
void TBluetoothAttributeParser::EndListL() 
	{ 
	switch ( iProcessingState ) 
		{ 
		// are we at the end of a list 
		case EEndOfDesOne: 
		case EEndOfDesTwo: 
		case EEndOfDesThree: 
			break; 
 
		default: 
			User::Leave(KErrGeneral); 
			break; 
		} 
 
	Next(); 
	} 
 
/** 
* CompareRFCOMM 
* 
* Check to see if RFCOMM is an advertised service 
* 
* @param aAttrValue the attribute value 
**/ 
void TBluetoothAttributeParser::CompareRFCOMM( CSdpAttrValue& aAttrValue ) 
	{ 
	TBool success = EFalse; 
 
	if ( aAttrValue.Type() == ETypeUUID ) 
		{ 
		if ( aAttrValue.UUID() == KRFCOMM ) 
			{ 
			success = ETrue; 
			} 
		} 
 
	if (!success) 
		iContinueSearching = EFalse; 
	} 
 
/** 
* GetPort 
* 
* Obtain Port information and return to the observer 
* 
* @param aAttrValue the attribute value 
* @return none 
**/ 
void TBluetoothAttributeParser::GetPort( CSdpAttrValue& aAttrValue ) 
	{ 
	TBool success = EFalse; 
 
	if ( aAttrValue.Type() == ETypeUint ) 
		{ 
		iPort = aAttrValue.Uint(); 
		iObserver.SetPort(iPort); 
		success = ETrue; 
		} 
 
	if (!success) 
		iContinueSearching = EFalse; 
	} 
 
/** 
* Next 
* 
* Move the State flag on to the next member of the Data Element Sequence 
* 
* @param none 
* @return none 
**/ 
void TBluetoothAttributeParser::Next() 
	{ 
    __ASSERT_DEBUG(iProcessingState != EFinished, Panic(EBadAttributeValue)); 
 
	// move to the next item 
	iProcessingState = static_cast( static_cast(iProcessingState) + 1 ); 
	}