* * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ declare (strict_types=1); namespace RectorPrefix202411\Fidry\CpuCoreCounter\Finder; use function getenv; use function preg_match; use function sprintf; use function var_export; final class EnvVariableFinder implements CpuCoreFinder { /** @var string */ private $environmentVariableName; public function __construct(string $environmentVariableName) { $this->environmentVariableName = $environmentVariableName; } public function diagnose() : string { $value = getenv($this->environmentVariableName); return sprintf('parse(getenv(%s)=%s)=%s', $this->environmentVariableName, var_export($value, \true), self::isPositiveInteger($value) ? $value : 'null'); } public function find() : ?int { $value = getenv($this->environmentVariableName); return self::isPositiveInteger($value) ? (int) $value : null; } public function toString() : string { return sprintf('getenv(%s)', $this->environmentVariableName); } /** * @param string|false $value */ private static function isPositiveInteger($value) : bool { return \false !== $value && 1 === preg_match('/^\\d+$/', $value) && (int) $value > 0; } }