Bit extension (invert bits)

CryptoSwift.xcodeproj/project.pbxproj

@@ -27,6 +27,7 @@
 		758F3F761992E57D0014BBDA /* Playground in Resources */ = {isa = PBXBuildFile; fileRef = 758F3F751992E57D0014BBDA /* Playground */; };
 		758F3F781992F6CE0014BBDA /* ByteExtension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 758F3F771992F6CE0014BBDA /* ByteExtension.swift */; };
 		7599C9C6199EA28700A3988B /* StringExtension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7599C9C5199EA28700A3988B /* StringExtension.swift */; };
+		759D481119B517BC005FF7FC /* BitExtension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 759D481019B517BC005FF7FC /* BitExtension.swift */; };
 		75B601EB197D6A6C0009B53D /* CryptoSwift.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 754BE45519693E190098E6F3 /* CryptoSwift.framework */; };
 		75EB380119ABDD710002375A /* ChaCha20.swift in Sources */ = {isa = PBXBuildFile; fileRef = 75EB380019ABDD710002375A /* ChaCha20.swift */; };
 /* End PBXBuildFile section */
@@ -120,6 +121,7 @@
 		758F3F751992E57D0014BBDA /* Playground */ = {isa = PBXFileReference; lastKnownFileType = folder; name = Playground; path = CryptoSwift/Playground; sourceTree = "<group>"; };
 		758F3F771992F6CE0014BBDA /* ByteExtension.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ByteExtension.swift; sourceTree = "<group>"; };
 		7599C9C5199EA28700A3988B /* StringExtension.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = StringExtension.swift; sourceTree = "<group>"; };
+		759D481019B517BC005FF7FC /* BitExtension.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = BitExtension.swift; sourceTree = "<group>"; };
 		75EB380019ABDD710002375A /* ChaCha20.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ChaCha20.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
@@ -184,6 +186,7 @@
 				75153D4119AA3C7900750381 /* SHA2.swift */,
 				75EB380019ABDD710002375A /* ChaCha20.swift */,
 				751C5C3C19B26B000094C75D /* Poly1305.swift */,
+				759D481019B517BC005FF7FC /* BitExtension.swift */,
 				758F3F771992F6CE0014BBDA /* ByteExtension.swift */,
 				7547195019931802002FA5F1 /* IntExtension.swift */,
 				752DEF7619693EA000E17557 /* NSDataExtension.swift */,
@@ -347,6 +350,7 @@
 				750A54601992D2680017DA75 /* MD5.swift in Sources */,
 				75164E4919AD30AC00737F30 /* Utils.swift in Sources */,
 				752DEF7719693EA000E17557 /* NSDataExtension.swift in Sources */,
+				759D481119B517BC005FF7FC /* BitExtension.swift in Sources */,
 				754C8FED19979F94005AD904 /* ArrayExtension.swift in Sources */,
 				7547195119931802002FA5F1 /* IntExtension.swift in Sources */,
 				757EF7F519AAA82400586276 /* CRC.swift in Sources */,

CryptoSwift/BitExtension.swift

@@ -0,0 +1,24 @@
+//
+//  BitExtension.swift
+//  CryptoSwift
+//
+//  Created by Marcin Krzyzanowski on 01/09/14.
+//  Copyright (c) 2014 Marcin Krzyzanowski. All rights reserved.
+//
+
+import Foundation
+
+extension Bit {
+
+    func inverted() -> Bit {
+        if (self == Bit.Zero) {
+            return Bit.One
+        }
+
+        return Bit.Zero
+    }
+
+    mutating func invert()  {
+        self = self.inverted()
+    }
+}