reduce code duplication for error handling

src/Exception/Exception.php

@@ -7,4 +7,13 @@
 
 namespace Icewind\SMB\Exception;
 
-class Exception extends \Exception {}
+class Exception extends \Exception {
+	static public function unknown($path, $error) {
+		$message = 'Unknown error (' . $error . ')';
+		if ($path) {
+			$message .= ' for ' . $path;
+		}
+
+		return new Exception($message, $error);
+	}
+}

src/NativeState.php

@@ -59,11 +59,7 @@ class NativeState {
 			case 113:
 				throw new NoRouteToHostException($path, $error);
 			default:
-				$message = 'Unknown error (' . $error . ')';
+				throw Exception::unknown($path, $error);
-				if ($path) {
-					$message .= ' for ' . $path;
-				}
-				throw new Exception($message, $error);
 		}
 	}
 

src/Parser.php

@@ -67,11 +67,7 @@ class Parser {
 				case ErrorCodes::SharingViolation:
 					throw new FileInUseException($path);
 				default:
-					$message = 'Unknown error (' . $error . ')';
+					throw Exception::unknown($path, $error);
-					if ($path) {
-						$message .= ' for ' . $path;
-					}
-					throw new Exception($message);
 			}
 		}
 	}