validip method
Besides evaluating if a string is a valid IP number it can report back what parts of the string that's wrong. Made after a request from Chris Wik
Regular expression found here:
http://www.regular-expressions.info/examples.html

2010-11-08	Jolle Carlestam	First version

Usage:
var(testips = array(
	'192.168.2.55', // valid
	'255.255.255.255', // valid
	'0.0.0.0', // valid
	'198.5.kk.25', // not valid
	'198.5.4', // not valid
	'999.999.255.255', // not valid
	'my mother likes cakes' // not valid
	))
var(holder = null)
iterate($testips)
	$holder = jina_validateip
	$holder -> input(loop_value)
	$holder -> valid
	!$holder -> valid ? ' ' + $holder -> errors
	'
'
/iterate

*/
define jina_validateip => type {

	data private err::array = array
	data private valid = false
	data private evaluated = false
	data private input::string

	public oncreate(
		input::string = ''
		) => {

		.'input' = #input -> ascopy

		.'input' -> size > 0 ? .evaluate

	}

	public oncreate(
		-input::string
		) => .oncreate(#input)

	private evaluate() => {
		.'valid' = .'input' -> validip
		.'evaluated' = true
	}

	public input(input::string) => {.'input' = #input -> ascopy}

	public valid() => {
		fail_if(.'input' -> size == 0, -1, 'No input value provided')
		if(!.'evaluated')
			.evaluate
		/if
	 	return .'valid'
	 }
	public asString() => .valid

	public errors() => {

		if(!.valid)
			local('parts')	= .'input' -> split('.')
			#parts -> size != 4 ? .'err' -> insert('Not the right number of octets.')
	
			local(reg_exp = regexp(-find = `\b(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b`))
	
			iterate(#parts)
				#reg_exp -> input = loop_value
				(#reg_exp-> findall) -> size != 1 ? .'err' -> insert('Invalid character(s) in octet ' + loop_count + ': ' + loop_value)
			/iterate
		/if
		return .'err'

	}

	public inputvalue() => .'input'

}

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