public static function ParagonIE_Sodium_Core_Util::load64_le in Automatic Updates 8

Same name and namespace in other branches

1. 7 vendor/paragonie/sodium_compat/src/Core/Util.php \ParagonIE_Sodium_Core_Util::load64_le()

Load a 8 character substring into an integer

@internal You should not use this directly from another application

Parameters

string $string:

Return value

int

Throws

RangeException

SodiumException

TypeError

File

vendor/paragonie/sodium_compat/src/Core/Util.php, line 459

Class

ParagonIE_Sodium_Core_Util

Class ParagonIE_Sodium_Core_Util

Code

public static function load64_le($string) {

  /* Type checks: */
  if (!is_string($string)) {
    throw new TypeError('Argument 1 must be a string, ' . gettype($string) . ' given.');
  }

  /* Input validation: */
  if (self::strlen($string) < 4) {
    throw new RangeException('String must be 4 bytes or more; ' . self::strlen($string) . ' given.');
  }
  if (PHP_VERSION_ID >= 50603 && PHP_INT_SIZE === 8) {

    /** @var array<int, int> $unpacked */
    $unpacked = unpack('P', $string);
    return (int) $unpacked[1];
  }

  /** @var int $result */
  $result = self::chrToInt($string[0]) & 0xff;
  $result |= (self::chrToInt($string[1]) & 0xff) << 8;
  $result |= (self::chrToInt($string[2]) & 0xff) << 16;
  $result |= (self::chrToInt($string[3]) & 0xff) << 24;
  $result |= (self::chrToInt($string[4]) & 0xff) << 32;
  $result |= (self::chrToInt($string[5]) & 0xff) << 40;
  $result |= (self::chrToInt($string[6]) & 0xff) << 48;
  $result |= (self::chrToInt($string[7]) & 0xff) << 56;
  return (int) $result;
}