/**
 * Sorts a column containing IP addresses in typical dot notation. This can 
 * be most useful when using DataTables for a networking application, and 
 * reporting information containing IP address. Also has a matching type 
 * detection plug-in for automatic type detection.
 *
 *  @name IP addresses 
 *  @summary Sort IP addresses numerically
 *  @author Brad Wasson
 *
 *  @example
 *    $('#example').dataTable( {
 *       columnDefs: [
 *         { type: 'ip-address', targets: 0 }
 *       ]
 *    } );
 */
jQuery.extend( jQuery.fn.dataTableExt.oSort, {
        "ip-address-pre": function ( a ) {
                var m = a.split("."), x = "";
                for(var i = 0; i < m.length; i++) {
                        var item = m[i];
                        if(item.length == 1) {
                                x += "00" + item;
                        } else if(item.length == 2) {
                                x += "0" + item;
                        } else {
                                x += item;
                        }
                }
                return x;
        },
        "ip-address-asc": function ( a, b ) {
                return ((a < b) ? -1 : ((a > b) ? 1 : 0));
        },
        "ip-address-desc": function ( a, b ) {
                return ((a < b) ? 1 : ((a > b) ? -1 : 0));
        }
} );