added operator~ to DNS::Ip class

Author: EmielBruijntjes

CMakeLists.txt

@@ -2,7 +2,7 @@
 cmake_minimum_required(VERSION 3.10 FATAL_ERROR)
 
 # Find a suitable compiler, and declare the version and language.
-project(DNS-CPP VERSION 1.3.2 LANGUAGES CXX)
+project(DNS-CPP VERSION 1.3.3 LANGUAGES CXX)
 
 # All artefacts should end up at the root of the build dir for convenience
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})

Makefile

@@ -3,7 +3,7 @@ INCLUDE_DIR             = ${PREFIX}/include
 LIBRARY_DIR             = ${PREFIX}/lib
 export LIBRARY_NAME		= dnscpp
 export SONAME			= 1.3
-export VERSION			= 1.3.2
+export VERSION			= 1.3.3
 
 all:
 		$(MAKE) -C src all

include/dnscpp/ip.h

@@ -340,6 +340,12 @@ class Ip
     {
         return any();
     }
+    
+    /**
+     *  Inverse operator
+     *  @return Ip
+     */
+    Ip operator~() const;
 
     /**
      *  Bitwise assignment OR operator (x |= y)

src/ip.cpp

@@ -228,6 +228,37 @@ Ip &Ip::operator=(const struct in6_addr *ip)
     return *this;
 }
 
+/**
+ *  Inverse operator
+ *  @return Ip
+ */
+Ip Ip::operator~() const
+{
+    // implementation depends on ip version
+    if (_version == 6)
+    {
+        // get the address
+        auto address = _data.ipv6;
+        
+        // iterate over the entire address
+        for (unsigned i = 0; i < 16; ++i) address.s6_addr[i] = ~address.s6_addr[i];
+        
+        // construct a new ip
+        return DNS::Ip(address);
+    }
+    else
+    {
+        // get the address
+        auto address = _data.ipv4;
+        
+        // ipv4 can use a single cpu operation
+        address.s_addr = ~address.s_addr;
+
+        // construct a new ip
+        return DNS::Ip(address);
+    }
+}
+
 /**
  *  Bitwise assignment OR operator (x |= y)
  *  @param  that        The other IP