wp-includes/sodium_compat/src/Core32/Curve25519.php:1817$charstring|intint public static function negative($char) { if (is_int($char)) { return $char < 0 ? 1 : 0; } /** @var string $char */ $x = self::chrToInt(self::substr($char, 0, 1)); return (int) ($x >> 31); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/sodium_compat/src/Core32/Curve25519.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.