/**
* parse a string of form U+A..U+B,U+C in a Range
*/
public static function parseRange($str, $db)
{
$set = [];
$junks = preg_split('/\\s*(?:,\\s*)+/', trim($str));
foreach ($junks as $j) {
$ranges = preg_split('/\\s*(?:-|\\.\\.|:)\\s*/', $j);
switch (count($ranges)) {
case 0:
break;
case 1:
$tmp = Toolkit::parseCodepoint($ranges[0]);
if (is_int($tmp)) {
$set[] = $tmp;
}
break;
case 2:
$low = Toolkit::parseCodepoint($ranges[0]);
$high = Toolkit::parseCodepoint($ranges[1]);
if (is_int($low) && is_int($high)) {
$set = array_merge($set, range(min($low, $high), max($high, $low)));
}
break;
default:
$max = -1;
$min = 0x110000;
foreach ($ranges as $r) {
$tmp = Toolkit::parseCodepoint($r);
if (is_int($tmp) && $tmp > $max) {
$max = $tmp;
}
if (is_int($tmp) && $tmp < $min) {
$min = $tmp;
}
}
if ($min < 0x110000 && $max > -1) {
$set = array_merge($set, range(min($min, $max), max($max, $min)));
}
}
}
return new Range($set, $db);
}
