src: Updating code style to conform (more or less) to ndn-cxx style

Also, adding .clang-format that describes the applied style. Note that
this style requires a slightly customized version of clang-format.
diff --git a/examples/custom-apps/custom-app.cpp b/examples/custom-apps/custom-app.cpp
index 71ca87e..001c440 100644
--- a/examples/custom-apps/custom-app.cpp
+++ b/examples/custom-apps/custom-app.cpp
@@ -33,112 +33,110 @@
 #include "ns3/ndn-fib.hpp"
 #include "ns3/random-variable.h"
 
-NS_LOG_COMPONENT_DEFINE ("CustomApp");
+NS_LOG_COMPONENT_DEFINE("CustomApp");
 
 namespace ns3 {
 
-NS_OBJECT_ENSURE_REGISTERED (CustomApp);
+NS_OBJECT_ENSURE_REGISTERED(CustomApp);
 
 // register NS-3 type
 TypeId
-CustomApp::GetTypeId ()
+CustomApp::GetTypeId()
 {
-  static TypeId tid = TypeId ("CustomApp")
-    .SetParent<ndn::App> ()
-    .AddConstructor<CustomApp> ()
-    ;
+  static TypeId tid = TypeId("CustomApp").SetParent<ndn::App>().AddConstructor<CustomApp>();
   return tid;
 }
 
 // Processing upon start of the application
 void
-CustomApp::StartApplication ()
+CustomApp::StartApplication()
 {
   // initialize ndn::App
-  ndn::App::StartApplication ();
+  ndn::App::StartApplication();
 
   // Create a name components object for name ``/prefix/sub``
-  Ptr<ndn::Name> prefix = Create<ndn::Name> (); // now prefix contains ``/``
-  prefix->append ("prefix"); // now prefix contains ``/prefix``
-  prefix->append ("sub"); // now prefix contains ``/prefix/sub``
+  Ptr<ndn::Name> prefix = Create<ndn::Name>(); // now prefix contains ``/``
+  prefix->append("prefix");                    // now prefix contains ``/prefix``
+  prefix->append("sub");                       // now prefix contains ``/prefix/sub``
 
   /////////////////////////////////////////////////////////////////////////////
   // Creating FIB entry that ensures that we will receive incoming Interests //
   /////////////////////////////////////////////////////////////////////////////
 
   // Get FIB object
-  Ptr<ndn::Fib> fib = GetNode ()->GetObject<ndn::Fib> ();
+  Ptr<ndn::Fib> fib = GetNode()->GetObject<ndn::Fib>();
 
   // Add entry to FIB
   // Note that ``m_face`` is cretaed by ndn::App
-  Ptr<ndn::fib::Entry> fibEntry = fib->Add (*prefix, m_face, 0);
+  Ptr<ndn::fib::Entry> fibEntry = fib->Add(*prefix, m_face, 0);
 
-  Simulator::Schedule (Seconds (1.0), &CustomApp::SendInterest, this);
+  Simulator::Schedule(Seconds(1.0), &CustomApp::SendInterest, this);
 }
 
 // Processing when application is stopped
 void
-CustomApp::StopApplication ()
+CustomApp::StopApplication()
 {
   // cleanup ndn::App
-  ndn::App::StopApplication ();
+  ndn::App::StopApplication();
 }
 
 void
-CustomApp::SendInterest ()
+CustomApp::SendInterest()
 {
   /////////////////////////////////////
   // Sending one Interest packet out //
   /////////////////////////////////////
-  
-  Ptr<ndn::Name> prefix = Create<ndn::Name> ("/prefix/sub"); // another way to create name
+
+  Ptr<ndn::Name> prefix = Create<ndn::Name>("/prefix/sub"); // another way to create name
 
   // Create and configure ndn::Interest
-  Ptr<ndn::Interest> interest = Create<ndn::Interest> ();
-  UniformVariable rand (0,std::numeric_limits<uint32_t>::max ());
-  interest->SetNonce            (rand.GetValue ());
-  interest->SetName             (prefix);
-  interest->SetInterestLifetime (Seconds (1.0));
+  Ptr<ndn::Interest> interest = Create<ndn::Interest>();
+  UniformVariable rand(0, std::numeric_limits<uint32_t>::max());
+  interest->SetNonce(rand.GetValue());
+  interest->SetName(prefix);
+  interest->SetInterestLifetime(Seconds(1.0));
 
-  NS_LOG_DEBUG ("Sending Interest packet for " << *prefix);
-  
+  NS_LOG_DEBUG("Sending Interest packet for " << *prefix);
+
   // Call trace (for logging purposes)
-  m_transmittedInterests (interest, this, m_face);
+  m_transmittedInterests(interest, this, m_face);
 
-  m_face->ReceiveInterest (interest);
+  m_face->ReceiveInterest(interest);
 }
 
 // Callback that will be called when Interest arrives
 void
-CustomApp::OnInterest (Ptr<const ndn::Interest> interest)
+CustomApp::OnInterest(Ptr<const ndn::Interest> interest)
 {
-  ndn::App::OnInterest (interest);
-  
-  NS_LOG_DEBUG ("Received Interest packet for " << interest->GetName ());
+  ndn::App::OnInterest(interest);
+
+  NS_LOG_DEBUG("Received Interest packet for " << interest->GetName());
 
   // Create and configure ndn::Data and ndn::DataTail
   // (header is added in front of the packet, tail is added at the end of the packet)
 
   // Note that Interests send out by the app will not be sent back to the app !
-  
-  Ptr<ndn::Data> data = Create<ndn::Data> (Create<Packet> (1024));
-  data->SetName (Create<ndn::Name> (interest->GetName ())); // data will have the same name as Interests
 
-  NS_LOG_DEBUG ("Sending Data packet for " << data->GetName ());  
+  Ptr<ndn::Data> data = Create<ndn::Data>(Create<Packet>(1024));
+  data->SetName(
+    Create<ndn::Name>(interest->GetName())); // data will have the same name as Interests
+
+  NS_LOG_DEBUG("Sending Data packet for " << data->GetName());
 
   // Call trace (for logging purposes)
-  m_transmittedDatas (data, this, m_face);
+  m_transmittedDatas(data, this, m_face);
 
-  m_face->ReceiveData (data); 
+  m_face->ReceiveData(data);
 }
 
 // Callback that will be called when Data arrives
 void
-CustomApp::OnData (Ptr<const ndn::Data> contentObject)
+CustomApp::OnData(Ptr<const ndn::Data> contentObject)
 {
-  NS_LOG_DEBUG ("Receiving Data packet for " << contentObject->GetName ());
+  NS_LOG_DEBUG("Receiving Data packet for " << contentObject->GetName());
 
-  std::cout << "DATA received for name " << contentObject->GetName () << std::endl;
+  std::cout << "DATA received for name " << contentObject->GetName() << std::endl;
 }
 
 } // namespace ns3
diff --git a/examples/custom-apps/custom-app.hpp b/examples/custom-apps/custom-app.hpp
index 86f7bb4..5d05e99 100644
--- a/examples/custom-apps/custom-app.hpp
+++ b/examples/custom-apps/custom-app.hpp
@@ -37,32 +37,31 @@
  *
  * When an Interest is received, it is replied with a Data with 1024-byte fake payload
  */
-class CustomApp : public ndn::App
-{
+class CustomApp : public ndn::App {
 public:
   // register NS-3 type "CustomApp"
   static TypeId
-  GetTypeId ();
-  
+  GetTypeId();
+
   // (overridden from ndn::App) Processing upon start of the application
   virtual void
-  StartApplication ();
+  StartApplication();
 
   // (overridden from ndn::App) Processing when application is stopped
   virtual void
-  StopApplication ();
+  StopApplication();
 
   // (overridden from ndn::App) Callback that will be called when Interest arrives
   virtual void
-  OnInterest (Ptr<const ndn::Interest> interest);
+  OnInterest(Ptr<const ndn::Interest> interest);
 
   // (overridden from ndn::App) Callback that will be called when Data arrives
   virtual void
-  OnData (Ptr<const ndn::Data> contentObject);
+  OnData(Ptr<const ndn::Data> contentObject);
 
 private:
   void
-  SendInterest ();
+  SendInterest();
 };
 
 } // namespace ns3
diff --git a/examples/custom-apps/dumb-requester.cpp b/examples/custom-apps/dumb-requester.cpp
index eca1cf2..f81548f 100644
--- a/examples/custom-apps/dumb-requester.cpp
+++ b/examples/custom-apps/dumb-requester.cpp
@@ -32,88 +32,85 @@
 #include "ns3/ndn-interest.hpp"
 #include "ns3/ndn-data.hpp"
 
-NS_LOG_COMPONENT_DEFINE ("DumbRequester");
+NS_LOG_COMPONENT_DEFINE("DumbRequester");
 
 namespace ns3 {
 
-NS_OBJECT_ENSURE_REGISTERED (DumbRequester);
+NS_OBJECT_ENSURE_REGISTERED(DumbRequester);
 
 // register NS-3 type
 TypeId
-DumbRequester::GetTypeId ()
+DumbRequester::GetTypeId()
 {
-  static TypeId tid = TypeId ("DumbRequester")
-    .SetParent<ndn::App> ()
-    .AddConstructor<DumbRequester> ()
+  static TypeId tid =
+    TypeId("DumbRequester")
+      .SetParent<ndn::App>()
+      .AddConstructor<DumbRequester>()
 
-    .AddAttribute ("Prefix", "Requested name",
-                   StringValue ("/dumb-interest"),
-                   ndn::MakeNameAccessor (&DumbRequester::m_name),
-                   ndn::MakeNameChecker ())
-    ;
+      .AddAttribute("Prefix", "Requested name", StringValue("/dumb-interest"),
+                    ndn::MakeNameAccessor(&DumbRequester::m_name), ndn::MakeNameChecker());
   return tid;
 }
 
-DumbRequester::DumbRequester ()
-  : m_isRunning (false)
+DumbRequester::DumbRequester()
+  : m_isRunning(false)
 {
 }
 
 // Processing upon start of the application
 void
-DumbRequester::StartApplication ()
+DumbRequester::StartApplication()
 {
   // initialize ndn::App
-  ndn::App::StartApplication ();
+  ndn::App::StartApplication();
 
   m_isRunning = true;
-  Simulator::ScheduleNow (&DumbRequester::SendInterest, this);
+  Simulator::ScheduleNow(&DumbRequester::SendInterest, this);
 }
 
 // Processing when application is stopped
 void
-DumbRequester::StopApplication ()
+DumbRequester::StopApplication()
 {
   m_isRunning = false;
   // cleanup ndn::App
-  ndn::App::StopApplication ();
+  ndn::App::StopApplication();
 }
 
 void
-DumbRequester::SendInterest ()
+DumbRequester::SendInterest()
 {
-  if (!m_isRunning) return;
-  
+  if (!m_isRunning)
+    return;
+
   /////////////////////////////////////
   // Sending one Interest packet out //
   /////////////////////////////////////
-  
-  Ptr<ndn::Name> prefix = Create<ndn::Name> (m_name); // another way to create name
+
+  Ptr<ndn::Name> prefix = Create<ndn::Name>(m_name); // another way to create name
 
   // Create and configure ndn::Interest
-  Ptr<ndn::Interest> interest = Create<ndn::Interest> ();
-  UniformVariable rand (0,std::numeric_limits<uint32_t>::max ());
-  interest->SetNonce            (rand.GetValue ());
-  interest->SetName             (prefix);
-  interest->SetInterestLifetime (Seconds (1.0));
+  Ptr<ndn::Interest> interest = Create<ndn::Interest>();
+  UniformVariable rand(0, std::numeric_limits<uint32_t>::max());
+  interest->SetNonce(rand.GetValue());
+  interest->SetName(prefix);
+  interest->SetInterestLifetime(Seconds(1.0));
 
-  NS_LOG_DEBUG ("Sending Interest packet for " << *prefix);
-  
+  NS_LOG_DEBUG("Sending Interest packet for " << *prefix);
 
   // Call trace (for logging purposes)
-  m_transmittedInterests (interest, this, m_face);
+  m_transmittedInterests(interest, this, m_face);
 
   // Forward packet to lower (network) layer
-  m_face->ReceiveInterest (interest);
+  m_face->ReceiveInterest(interest);
 
-  Simulator::Schedule (Seconds (1.0), &DumbRequester::SendInterest, this);
+  Simulator::Schedule(Seconds(1.0), &DumbRequester::SendInterest, this);
 }
 
 void
-DumbRequester::OnData (Ptr<const ndn::Data> contentObject)
+DumbRequester::OnData(Ptr<const ndn::Data> contentObject)
 {
-  NS_LOG_DEBUG ("Receiving Data packet for " << contentObject->GetName ());
+  NS_LOG_DEBUG("Receiving Data packet for " << contentObject->GetName());
 }
 
-
 } // namespace ns3
diff --git a/examples/custom-apps/dumb-requester.hpp b/examples/custom-apps/dumb-requester.hpp
index 7a1272d..55bdace 100644
--- a/examples/custom-apps/dumb-requester.hpp
+++ b/examples/custom-apps/dumb-requester.hpp
@@ -31,32 +31,31 @@
 /**
  * @brief A dumb requester application
  *
- * This app keeps requesting every second the same content object 
+ * This app keeps requesting every second the same content object
  */
-class DumbRequester : public ndn::App
-{
+class DumbRequester : public ndn::App {
 public:
   // register NS-3 type "DumbRequester"
   static TypeId
-  GetTypeId ();
+  GetTypeId();
 
-  DumbRequester ();
-  
+  DumbRequester();
+
   // (overridden from ndn::App) Processing upon start of the application
   virtual void
-  StartApplication ();
+  StartApplication();
 
   // (overridden from ndn::App) Processing when application is stopped
   virtual void
-  StopApplication ();
+  StopApplication();
 
   // (overridden from ndn::App) Callback that will be called when Data arrives
   virtual void
-  OnData (Ptr<const ndn::Data> contentObject);
-  
+  OnData(Ptr<const ndn::Data> contentObject);
+
 private:
   void
-  SendInterest ();
+  SendInterest();
 
 private:
   bool m_isRunning;
diff --git a/examples/custom-apps/hijacker.cpp b/examples/custom-apps/hijacker.cpp
index f1852d4..bcff26a 100644
--- a/examples/custom-apps/hijacker.cpp
+++ b/examples/custom-apps/hijacker.cpp
@@ -23,53 +23,49 @@
 #include "hijacker.hpp"
 #include "ns3/ndn-name.hpp"
 
-NS_LOG_COMPONENT_DEFINE ("Hijacker");
+NS_LOG_COMPONENT_DEFINE("Hijacker");
 
 namespace ns3 {
 
 // Necessary if you are planning to use ndn::AppHelper
-NS_OBJECT_ENSURE_REGISTERED (Hijacker);
+NS_OBJECT_ENSURE_REGISTERED(Hijacker);
 
 TypeId
-Hijacker::GetTypeId ()
+Hijacker::GetTypeId()
 {
-  static TypeId tid = TypeId ("Hijacker")
-    .SetParent<ndn::App> ()
-    .AddConstructor<Hijacker> ()
-    ;
+  static TypeId tid = TypeId("Hijacker").SetParent<ndn::App>().AddConstructor<Hijacker>();
 
   return tid;
 }
 
-Hijacker::Hijacker ()
+Hijacker::Hijacker()
 {
 }
 
 void
-Hijacker::OnInterest (Ptr<const ndn::Interest> interest)
+Hijacker::OnInterest(Ptr<const ndn::Interest> interest)
 {
-  ndn::App::OnInterest (interest); // forward call to perform app-level tracing
+  ndn::App::OnInterest(interest); // forward call to perform app-level tracing
   // do nothing else (hijack interest)
 
-  NS_LOG_DEBUG ("Do nothing for incoming interest for" << interest->GetName ());
+  NS_LOG_DEBUG("Do nothing for incoming interest for" << interest->GetName());
 }
 
 void
-Hijacker::StartApplication ()
+Hijacker::StartApplication()
 {
-  App::StartApplication ();
+  App::StartApplication();
 
   // equivalent to setting interest filter for "/" prefix
-  Ptr<ndn::Fib> fib = GetNode ()->GetObject<ndn::Fib> ();
-  Ptr<ndn::fib::Entry> fibEntry = fib->Add (ndn::Name ("/"), m_face, 0);
-  fibEntry->UpdateStatus (m_face, ndn::fib::FaceMetric::NDN_FIB_GREEN);
+  Ptr<ndn::Fib> fib = GetNode()->GetObject<ndn::Fib>();
+  Ptr<ndn::fib::Entry> fibEntry = fib->Add(ndn::Name("/"), m_face, 0);
+  fibEntry->UpdateStatus(m_face, ndn::fib::FaceMetric::NDN_FIB_GREEN);
 }
 
 void
-Hijacker::StopApplication ()
+Hijacker::StopApplication()
 {
-  App::StopApplication ();
+  App::StopApplication();
 }
 
 } // namespace ns3
-
diff --git a/examples/custom-apps/hijacker.hpp b/examples/custom-apps/hijacker.hpp
index a90166d..a794f12 100644
--- a/examples/custom-apps/hijacker.hpp
+++ b/examples/custom-apps/hijacker.hpp
@@ -29,25 +29,24 @@
 
 namespace ns3 {
 
-class Hijacker : public ndn::App
-{
+class Hijacker : public ndn::App {
 public:
   static TypeId
-  GetTypeId ();
+  GetTypeId();
 
-  Hijacker ();
+  Hijacker();
 
   // Receive all Interests but do nothing in response
   void
-  OnInterest (Ptr<const ndn::Interest> interest);
+  OnInterest(Ptr<const ndn::Interest> interest);
 
 protected:
   // inherited from Application base class.
   virtual void
-  StartApplication ();
+  StartApplication();
 
   virtual void
-  StopApplication ();
+  StopApplication();
 };
 
 } // namespace ns3