xrGame/obstacles_query.cpp: cleanup

Thanks @abramcumner

Author: Xottab-DUTY

src/xrGame/obstacles_query.cpp

@@ -20,8 +20,9 @@
 
 void obstacles_query::set_intersection(const obstacles_query& query)
 {
-    u32 n = m_obstacles.size();
-    u32 buffer_size = n * sizeof(OBSTACLES::value_type);
+    // XXX: probably replace alloca
+    const u32 n = m_obstacles.size();
+    const u32 buffer_size = n * sizeof(OBSTACLES::value_type);
     OBSTACLES::value_type* temp = (OBSTACLES::value_type*)_alloca(buffer_size);
     memcpy(temp, &*obstacles().begin(), buffer_size);
     m_obstacles.erase(
@@ -36,14 +37,12 @@ void obstacles_query::set_intersection(const obstacles_query& query)
 
 void obstacles_query::merge(const AREA& object_area)
 {
-    u32 area_size = m_area.size();
-    u32 destination_size = area_size + object_area.size();
-    u32 buffer_size = destination_size * sizeof(u32);
-    u32* temp = (u32*)_alloca(buffer_size);
-    memcpy(temp, &*m_area.begin(), area_size * sizeof(u32));
+    AREA temp(std::move(m_area));
+    const u32 area_size = temp.size();
+    const u32 destination_size = area_size + object_area.size();
     m_area.resize(destination_size);
     m_area.erase(
-        std::set_union(temp, temp + area_size, object_area.begin(), object_area.end(), m_area.begin()), m_area.end());
+        std::set_union(temp.begin(), temp.end(), object_area.begin(), object_area.end(), m_area.begin()), m_area.end());
 }
 
 void obstacles_query::compute_area()
@@ -53,23 +52,20 @@ void obstacles_query::compute_area()
     m_area.clear();
 
     m_crc = 0;
-    OBSTACLES::iterator I = m_obstacles.begin();
-    OBSTACLES::iterator E = m_obstacles.end();
-    for (; I != E; ++I)
+
+    for (auto& it : m_obstacles)
     {
-        ai_obstacle& obstacle = (*I).first->obstacle();
+        ai_obstacle& obstacle = it.first->obstacle();
         merge(obstacle.area());
-        (*I).second = obstacle.crc();
-        m_crc ^= (*I).second;
+        it.second = obstacle.crc();
+        m_crc ^= it.second;
     }
 }
 
 void obstacles_query::merge(const obstacles_query& query)
 {
-    OBSTACLES::const_iterator I = query.obstacles().begin();
-    OBSTACLES::const_iterator E = query.obstacles().end();
-    for (; I != E; ++I)
-        add((*I).first);
+    for (const auto& it : query.obstacles())
+        add(it.first);
 }
 
 bool obstacles_query::merge(const Fvector& position, const float& radius, const obstacles_query& query)
@@ -85,27 +81,25 @@ bool obstacles_query::merge(const Fvector& position, const float& radius, const
         return (true);
     }
 
-    u32 crc_before = crc();
+    const u32 crc_before = crc();
     compute_area();
-    return (crc() != crc_before);
+    return crc() != crc_before;
 }
 
 bool obstacles_query::objects_changed(const Fvector& position, const float& radius) const
 {
-    OBSTACLES::const_iterator I = obstacles().begin();
-    OBSTACLES::const_iterator E = obstacles().end();
-    for (; I != E; ++I)
+    for (const auto& it : obstacles())
     {
-        if ((*I).first->obstacle().crc() == (*I).second)
+        if (it.first->obstacle().crc() == it.second)
             continue;
 
-        if ((*I).first->obstacle().distance_to(position) >= radius)
+        if (it.first->obstacle().distance_to(position) >= radius)
             continue;
 
-        return (true);
+        return true;
     }
 
-    return (false);
+    return false;
 }
 
 struct too_far_predicate
@@ -121,44 +115,40 @@ struct too_far_predicate
 
     IC bool operator()(const std::pair<const CGameObject*, u32>& object) const
     {
-        typedef obstacles_query::AREA AREA;
-        const AREA& area = object.first->obstacle().area();
-        AREA::const_iterator I = area.begin();
-        AREA::const_iterator E = area.end();
-        for (; I != E; ++I)
+        for (const auto& it : object.first->obstacle().area())
         {
-            Fvector vertex_position = ai().level_graph().vertex_position(*I);
+            Fvector vertex_position = ai().level_graph().vertex_position(it);
             const float distance_sqr = vertex_position.distance_to_sqr(m_position);
             if (distance_sqr < m_radius_sqr)
-                return (false);
+                return false;
         }
 
-        return (true);
+        return true;
     }
 };
 
 bool obstacles_query::remove_objects(const Fvector& position, const float& radius)
 {
     update_objects(position, radius);
 
-    OBSTACLES::iterator I = std::remove_if(m_obstacles.begin(), m_obstacles.end(), too_far_predicate(position, radius));
+    const auto iterator = std::remove_if(m_obstacles.begin(), m_obstacles.end(), too_far_predicate(position, radius));
 
-    if (I == m_obstacles.end())
-        return (false);
+    if (iterator == m_obstacles.end())
+        return false;
 
-    m_obstacles.erase(I, m_obstacles.end());
+    m_obstacles.erase(iterator, m_obstacles.end());
 
     m_actual = false;
-    u32 crc_before = crc();
+    const u32 crc_before = crc();
     compute_area();
-    return (crc_before != crc());
+    return crc_before != crc();
 }
 
 void obstacles_query::remove_links(IGameObject* object)
 {
-    OBSTACLES::iterator I = m_obstacles.find(smart_cast<CGameObject*>(object));
-    if (I == m_obstacles.end())
+    const auto iterator = m_obstacles.find(smart_cast<CGameObject*>(object));
+    if (iterator == m_obstacles.end())
         return;
 
-    m_obstacles.erase(I);
+    m_obstacles.erase(iterator);
 }