Refactor SettingsUI and related modules

submodules/PersistentStringHash/Sources/PersistentStringHash.h

@@ -0,0 +1,19 @@
+//
+//  PersistentStringHash.h
+//  PersistentStringHash
+//
+//  Created by Peter on 8/17/19.
+//  Copyright © 2019 Telegram Messenger LLP. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+//! Project version number for PersistentStringHash.
+FOUNDATION_EXPORT double PersistentStringHashVersionNumber;
+
+//! Project version string for PersistentStringHash.
+FOUNDATION_EXPORT const unsigned char PersistentStringHashVersionString[];
+
+// In this header, you should import all the public headers of your framework using statements like #import <PersistentStringHash/PublicHeader.h>
+
+

submodules/PersistentStringHash/Sources/StringHash.swift

@@ -0,0 +1,12 @@
+import Foundation
+
+public extension String {
+    var persistentHashValue: UInt64 {
+        var result = UInt64 (5381)
+        let buf = [UInt8](self.utf8)
+        for b in buf {
+            result = 127 * (result & 0x00ffffffffffffff) + UInt64(b)
+        }
+        return result
+    }
+}