ParagonIE_Sodium_Core32_Curve25519::fe_isnegative() public WP 1.0

Is a field element negative? (1 = yes, 0 = no. Used in calculations.)

{} It's a method of the class: ParagonIE_Sodium_Core32_Curve25519{}

No Hooks.

Return

Int.

Usage

$result = ParagonIE_Sodium_Core32_Curve25519::fe_isnegative( $f );

$f(ParagonIE_Sodium_Core32_Curve25519_Fe) (required)

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Code of ParagonIE_Sodium_Core32_Curve25519::fe_isnegative() ParagonIE Sodium Core32 Curve25519::fe isnegative ^{WP 5.8.3}

public static function fe_isnegative(ParagonIE_Sodium_Core32_Curve25519_Fe $f)
{
    $str = self::fe_tobytes($f);
    return (int) (self::chrToInt($str[0]) & 1);
}