Removed deprecated rak header files.

src/display/window.h

@@ -102,6 +102,63 @@ protected:
   torrent::utils::SchedulerEntry m_task_update;
 };
 
+// Return a range with a distance of no more than __distance and
+// between __first and __last, centered on __middle1.
+template <typename _InputIter, typename _Distance>
+std::pair<_InputIter, _InputIter>
+advance_bidirectional(_InputIter __first, _InputIter __middle1, _InputIter __last, _Distance __distance) {
+  _InputIter __middle2 = __middle1;
+
+  do {
+    if (!__distance)
+      break;
+
+    if (__middle2 != __last) {
+      ++__middle2;
+      --__distance;
+
+    } else if (__middle1 == __first) {
+      break;
+    }
+
+    if (!__distance)
+      break;
+
+    if (__middle1 != __first) {
+      --__middle1;
+      --__distance;
+
+    } else if (__middle2 == __last) {
+      break;
+    }
+
+  } while (true);
+
+  return std::make_pair(__middle1, __middle2);
+}
+
+template <typename _InputIter, typename _Distance>
+_InputIter
+advance_forward(_InputIter __first, _InputIter __last, _Distance __distance) {
+  while (__first != __last && __distance != 0) {
+    __first++;
+    __distance--;
+  }
+
+  return __first;
+}
+
+template <typename _InputIter, typename _Distance>
+_InputIter
+advance_backward(_InputIter __first, _InputIter __last, _Distance __distance) {
+  while (__first != __last && __distance != 0) {
+    __first--;
+    __distance--;
+  }
+
+  return __first;
+}
+
 }
 
 #endif