IsoCodes\Cusip::validate()

Complexity

Conditions	9
Paths	13

Size

Total Lines

30

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
    public static function validate($cusip)
    {
        if (9 !== strlen($cusip)) {
            return false;
        }
        $sum = 0;
        for ($i = 0; $i <= 7; ++$i) {
            $c = $cusip[$i];
            if (ctype_digit($c)) {
                $v = intval($c);
            } elseif (ctype_alpha($c)) {
                $position = ord(strtoupper($c)) - ord('A') + 1;
                $v = $position + 9;
            } elseif ('*' == $c) {
                $v = 36;
            } elseif ('@' == $c) {
                $v = 37;
            } elseif ('#' == $c) {
                $v = 38;
            } else {
                return false;
            }
            if (1 == $i % 2) {
                $v *= 2;
            }
            $sum += floor($v / 10) + ($v % 10);
        }

        return ord($cusip[8]) - 48 == (10 - ($sum % 10)) % 10;
    }
}