Not Sure of Memory Leak with ** ?

FROM : Craig Bakalian
DATE : Sat Nov 20 12:46:41 2004

Hi,
This is the first time I have made a function call like this, with a
pointer to a pointer -

-(BOOL)isWordInQuestion: (NSString *)word  location: (NSString
**)location
{
    NSRange r = NSMakeRange(0,0);
    NSMutableString *ms = [NSMutableString string];
    [ms appendString: [self stringFromRTFDData: [self questionBody]]];
    [ms appendString: [self stringFromRTFDData: [self optionOne]]];
    [ms appendString: [self stringFromRTFDData: [self optionTwo]]];
    [ms appendString: [self stringFromRTFDData: [self optionThree]]];
    [ms appendString: [self stringFromRTFDData: [self optionFour]]];
    NS_DURING
    r = [ms rangeOfString: word];
    NS_HANDLER
    if ([[localException name] isEqualToString:
NSInvalidArgumentException] ||
   [[localException name] isEqualToString: NSRangeException])
   {
       return NO;
   }
    NS_ENDHANDLER
    if(r.location > 0 && r.length > 0)
    {
   NSMutableString *s = [NSMutableString string];
   [s appendString: [[self test]testName]];
   [s appendString: @", "];
   [s appendString: [self getQuestionNameAndNumber]];
   *location = [s copy];
   return YES;
    }
    else return NO;
}

And then another object iterates through all of the above objects and
calls the above function like so -

- (IBAction)findThisWord:(id)sender
{
    NSString *word = [findWordTextField stringValue];
    if(![word isEqualToString: @""])
    {
   for(i=0;i<[allQuestions count]; i++)
   {
       Question *q = [allQuestions objectAtIndex: i];
       BOOL isIn;
       NSString *loc =nil;
       isIn = [q isWordInQuestion: word location: &loc];
       if(loc)NSLog(@"%@", loc);
       [loc release];
   }
    }
}

The big questions is - am I releasing properly, is there any leaking? I
have tested, not thoroughly, but still I am concerned.  I am not
throwing and memory erros, but... How does one release, retain, copy,
when using a point to a pointer in Foundation and Objective C?

Craig Bakalian
www.eThinkingCap.com