protected static function mintTime($node = NULL, $seq = NULL, $time = NULL)
{
/* Generates a Version 1 UUID.
These are derived from the time at which they were generated. */
// Do a sanity check on clock sequence
if ($seq !== NULL && strlen($seq) != 2) {
throw UUIDException("Clock sequence most be a two-byte binary string.");
}
// If no time is specified, get time since Gregorian calendar
// reform in 100ns intervals. This is exceedingly difficult
// because of PHP's (and pack()'s) integer size limits
// Note that this will never be more accurate than to the microsecond
// Specifying a time for this method should only ever be used for
// debugging purposes, lest uniqueness be compromised
$time = $time !== NULL ? (double) $time : microtime(1);
$time = $time * 10000000 + self::interval;
// Convert to a string representation
$time = sprintf("%F", $time);
preg_match("/^\\d+/", $time, $time);
//strip decimal point
// And now to a 64-bit binary representation
$time = base_convert($time[0], 10, 16);
$time = pack("H*", str_pad($time, 16, "0", STR_PAD_LEFT));
// Reorder bytes to their proper locations in the UUID
$uuid = $time[4] . $time[5] . $time[6] . $time[7] . $time[2] . $time[3] . $time[0] . $time[1];
// Generate a random clock sequence if one is not provided
// Please consult Sections 4.1.5 and 4.2.1 of RFC 4122 for
// guidance regarding when to use a new clock sequence
$uuid .= $seq !== NULL ? $seq : self::randomBytes(2);
// set variant
$uuid[8] = chr(ord($uuid[8]) & self::clearVar | self::varRFC);
// set version
$uuid[6] = chr(ord($uuid[6]) & self::clearVer | self::version1);
// Set the final 'node' parameter, a MAC address
if ($node) {
$node = self::makeBin($node, 6);
}
if (!$node) {
// If no node was provided or if the node was invalid,
// generate a random MAC address and set the multicast bit
$node = self::randomBytes(6);
$node[0] = pack("C", ord($node[0]) | 1);
}
$uuid .= $node;
return $uuid;
}
protected static function CheckTimeInput($node, $seq, $time)
{
/* If no timestamp has been specified, generate one.
Note that this will never be more accurate than to
the microsecond, whereas UUID timestamps are measured in 100ns steps. */
$time = $time !== NULL ? self::normalizeTime($time) : self::normalizeTime(microtime(), 1);
/* If a node ID is supplied, use it and keep it in the store; if none is
supplied, get it from the store or generate it if none is stored. */
if ($node === NULL) {
$node = self::$store->getNode();
if (!$node) {
$node = self::randomBytes(6);
$node[0] = pack("C", ord($node[0]) | 1);
}
} else {
$node = self::makeNode($node);
if (!$node) {
throw new UUIDException("Node must be a valid MAC address.", 101);
}
}
// Do a sanity check on clock sequence if one is provided
if ($seq !== NULL && strlen($seq) != 2) {
throw UUIDException("Clock sequence must be a two-byte binary string.", 102);
}
// If one is not provided, check stable/volatile storage for a valid clock sequence
if ($seq === NULL) {
$seq = self::$store->getSequence($time, $node);
}
// Generate a random clock sequence if one is not available
if (!$seq) {
$seq = self::seq();
self::$store->setSequence($seq);
}
self::$store->setTimestamp($time);
return array($node, $seq, $time);
}
