Re: IPAddressFormatter?

FROM : Clark Cox
DATE : Thu Oct 14 23:11:50 2004

On Thu, 14 Oct 2004 10:31:34 -0400, Brent Gulanowski
<<email_removed>> wrote:
> I scanned the 'net and the archives and check in Omni and Misc, but I
> can't seem to find a freebie IP Address formatter. I know I'm being
> lazy, but if anyone has one lying around it and wanted to share I'd be
> your friend forever. Or larn me how to search better ;-).


It shouldn't be that tough, here's something just hacked together in
Mail, handles the input of IP addresses as XXX.XXX.XXX.XXX in hex, oct
or decimal; as well as IP addresses specified as a single 32-bit
number:

-----------
@interface IPFormatter : NSFormatter
@end

@implementation IPFormatter

- (NSString *)stringForObjectValue:(id)obj
{
  unsigned int  ipNumber;
 
  if([obj isKindOfClass:[NSNumber class]])
  {
    ipNumber  = [obj unsignedIntValue];
  }
  else
  {
    ipNumber  = [obj intValue];
  }
 
  return [NSString stringWithFormat: @"%u.%u.%u.%u",
    (ipNumber >> 24) & 0xFF,
    (ipNumber >> 16) & 0xFF,
    (ipNumber >> 8) & 0xFF,
    ipNumber & 0xFF];
}

unsigned long ConvertPart(NSString *part)
{
  if(part)
    return strtoul([part UTF8String], NULL, 0);
  else
    return 0;
}

- (BOOL)getObjectValue:(id *)obj forString:(NSString *)string
errorDescription:(NSString **)error
{
  //Remove any characters that are not in [0-9xX.]
  NSMutableString *tempString          = [NSMutableString
stringWithString: string];
  NSCharacterSet  *illegalCharacters    = [[NSCharacterSet
characterSetWithCharactersInString:@"0123456789xX."] invertedSet];
  NSRange        illegalCharacterRange = [tempString
rangeOfCharacterFromSet: illegalCharacters];
 
  while(illegalCharacterRange.location != NSNotFound)
  {
    [tempString deleteCharactersInRange: illegalCharacterRange];
    illegalCharacterRange = [tempString rangeOfCharacterFromSet:
illegalCharacters];
  }
 
  string          = tempString;
 
  NSArray *parts  = [string componentsSeparatedByString: @"."];
 
  switch([parts count])
  {
    case 0:
      *obj  = [NSNumber numberWithUnsignedLong: 0];
      return TRUE;
     
    case 1:
      *obj  = [NSNumber numberWithUnsignedLong: ConvertPart([parts
objectAtIndex: 0])];
      return TRUE;
     
    case 2:
      *obj  = [NSNumber numberWithUnsignedLong: (((ConvertPart([parts
objectAtIndex: 0]) & 0xFF) << 24) |
                                                ((ConvertPart([parts
objectAtIndex: 1]) & 0xFF) << 16))];
      return TRUE;
     
    case 3:
      *obj  = [NSNumber numberWithUnsignedLong: (((ConvertPart([parts
objectAtIndex: 0]) & 0xFF) << 24) |
                                                ((ConvertPart([parts
objectAtIndex: 1]) & 0xFF) << 16) |
                                                ((ConvertPart([parts
objectAtIndex: 2]) & 0xFF) << 8))];
      return TRUE;
     
    case 4:
      *obj  = [NSNumber numberWithUnsignedLong: (((ConvertPart([parts
objectAtIndex: 0]) & 0xFF) << 24) |
                                                ((ConvertPart([parts
objectAtIndex: 1]) & 0xFF) << 16) |
                                                ((ConvertPart([parts
objectAtIndex: 2]) & 0xFF) << 8) |
                                                (ConvertPart([parts
objectAtIndex: 3]) & 0xFF))];
      return TRUE;
     
    default:
      return FALSE;
  }
}

@end
-----------


--
Clark S. Cox III
<email_removed>
http://www.livejournal.com/users/clarkcox3/
http://homepage.mac.com/clarkcox3/