Code modernization: src/n*, src/o* (#6280)

* Code modernization: src/n*, src/o*

* empty function
* default constructor/destructor
* for range-based loops
* use emplace_back instead of push_back
* remove unused IWritableNodeDefManager::clone()
* C++ STL header style
* Pointer constness in some functions

1 files changed, 98 insertions, 124 deletions

diff --git a/src/nodedef.cpp b/src/nodedef.cpp
index 651418cd8..21522955e 100644
--- a/src/nodedef.cpp
+++ b/src/nodedef.cpp
@@ -78,12 +78,9 @@ void NodeBox::serialize(std::ostream &os, u16 protocol_version) const
 			writeU8(os, type);
 
 		writeU16(os, fixed.size());
-		for (std::vector<aabb3f>::const_iterator
-				i = fixed.begin();
-				i != fixed.end(); ++i)
-		{
-			writeV3F1000(os, i->MinEdge);
-			writeV3F1000(os, i->MaxEdge);
+		for (const aabb3f &nodebox : fixed) {
+			writeV3F1000(os, nodebox.MinEdge);
+			writeV3F1000(os, nodebox.MaxEdge);
 		}
 		break;
 	case NODEBOX_WALLMOUNTED:
@@ -108,14 +105,12 @@ void NodeBox::serialize(std::ostream &os, u16 protocol_version) const
 		} else {
 			writeU8(os, type);
 
-#define WRITEBOX(box) do { \
+#define WRITEBOX(box) \
 		writeU16(os, (box).size()); \
-		for (std::vector<aabb3f>::const_iterator \
-				i = (box).begin(); \
-				i != (box).end(); ++i) { \
-			writeV3F1000(os, i->MinEdge); \
-			writeV3F1000(os, i->MaxEdge); \
-		}; } while (0)
+		for (const aabb3f &i: (box)) { \
+			writeV3F1000(os, i.MinEdge); \
+			writeV3F1000(os, i.MaxEdge); \
+		};
 
 			WRITEBOX(fixed);
 			WRITEBOX(connect_top);
@@ -170,7 +165,7 @@ void NodeBox::deSerialize(std::istream &is)
 		while (count--) { \
 			v3f min = readV3F1000(is); \
 			v3f max = readV3F1000(is); \
-			(box).push_back(aabb3f(min, max)); }; } while (0)
+			(box).emplace_back(min, max); }; } while (0)
 
 		u16 count;
 
@@ -303,10 +298,6 @@ ContentFeatures::ContentFeatures()
 	reset();
 }
 
-ContentFeatures::~ContentFeatures()
-{
-}
-
 void ContentFeatures::reset()
 {
 	/*
@@ -334,15 +325,15 @@ void ContentFeatures::reset()
 	drawtype = NDT_NORMAL;
 	mesh = "";
 #ifndef SERVER
-	for(u32 i = 0; i < 24; i++)
-		mesh_ptr[i] = NULL;
+	for (auto &i : mesh_ptr)
+		i = NULL;
 	minimap_color = video::SColor(0, 0, 0, 0);
 #endif
 	visual_scale = 1.0;
-	for(u32 i = 0; i < 6; i++)
-		tiledef[i] = TileDef();
-	for(u16 j = 0; j < CF_SPECIAL_COUNT; j++)
-		tiledef_special[j] = TileDef();
+	for (auto &i : tiledef)
+		i = TileDef();
+	for (auto &j : tiledef_special)
+		j = TileDef();
 	alpha = 255;
 	post_effect_color = video::SColor(0, 0, 0, 0);
 	param_type = CPT_NONE;
@@ -398,10 +389,9 @@ void ContentFeatures::serialize(std::ostream &os, u16 protocol_version) const
 	// general
 	os << serializeString(name);
 	writeU16(os, groups.size());
-	for (ItemGroupList::const_iterator i = groups.begin(); i != groups.end();
-		++i) {
-		os << serializeString(i->first);
-		writeS16(os, i->second);
+	for (const auto &group : groups) {
+		os << serializeString(group.first);
+		writeS16(os, group.second);
 	}
 	writeU8(os, param_type);
 	writeU8(os, param_type_2);
@@ -411,13 +401,13 @@ void ContentFeatures::serialize(std::ostream &os, u16 protocol_version) const
 	os << serializeString(mesh);
 	writeF1000(os, visual_scale);
 	writeU8(os, 6);
-	for (u32 i = 0; i < 6; i++)
-		tiledef[i].serialize(os, protocol_version);
-	for (u32 i = 0; i < 6; i++)
-		tiledef_overlay[i].serialize(os, protocol_version);
+	for (const TileDef &td : tiledef)
+		td.serialize(os, protocol_version);
+	for (const TileDef &td : tiledef_overlay)
+		td.serialize(os, protocol_version);
 	writeU8(os, CF_SPECIAL_COUNT);
-	for (u32 i = 0; i < CF_SPECIAL_COUNT; i++) {
-		tiledef_special[i].serialize(os, protocol_version);
+	for (const TileDef &td : tiledef_special) {
+		td.serialize(os, protocol_version);
 	}
 	writeU8(os, alpha);
 	writeU8(os, color.getRed());
@@ -427,9 +417,8 @@ void ContentFeatures::serialize(std::ostream &os, u16 protocol_version) const
 	writeU8(os, waving);
 	writeU8(os, connect_sides);
 	writeU16(os, connects_to_ids.size());
-	for (std::set<content_t>::const_iterator i = connects_to_ids.begin();
-		i != connects_to_ids.end(); ++i)
-		writeU16(os, *i);
+	for (u16 connects_to_id : connects_to_ids)
+		writeU16(os, connects_to_id);
 	writeU8(os, post_effect_color.getAlpha());
 	writeU8(os, post_effect_color.getRed());
 	writeU8(os, post_effect_color.getGreen());
@@ -485,7 +474,7 @@ void ContentFeatures::correctAlpha(TileDef *tiles, int length)
 		return;
 
 	for (int i = 0; i < length; i++) {
-		if (tiles[i].name == "")
+		if (tiles[i].name.empty())
 			continue;
 		std::stringstream s;
 		s << tiles[i].name << "^[noalpha^[opacity:" << ((int)alpha);
@@ -500,7 +489,9 @@ void ContentFeatures::deSerialize(std::istream &is)
 	if (version < 9) {
 		deSerializeOld(is, version);
 		return;
-	} else if (version > 11) {
+	}
+
+	if (version > 11) {
 		throw SerializationError("unsupported ContentFeatures version");
 	}
 
@@ -522,15 +513,15 @@ void ContentFeatures::deSerialize(std::istream &is)
 	visual_scale = readF1000(is);
 	if (readU8(is) != 6)
 		throw SerializationError("unsupported tile count");
-	for (u32 i = 0; i < 6; i++)
-		tiledef[i].deSerialize(is, version, drawtype);
+	for (TileDef &td : tiledef)
+		td.deSerialize(is, version, drawtype);
 	if (version >= 10)
-		for (u32 i = 0; i < 6; i++)
-			tiledef_overlay[i].deSerialize(is, version, drawtype);
+		for (TileDef &td : tiledef_overlay)
+			td.deSerialize(is, version, drawtype);
 	if (readU8(is) != CF_SPECIAL_COUNT)
 		throw SerializationError("unsupported CF_SPECIAL_COUNT");
-	for (u32 i = 0; i < CF_SPECIAL_COUNT; i++)
-		tiledef_special[i].deSerialize(is, version, drawtype);
+	for (TileDef &td : tiledef_special)
+		td.deSerialize(is, version, drawtype);
 	alpha = readU8(is);
 	color.setRed(readU8(is));
 	color.setGreen(readU8(is));
@@ -667,14 +658,14 @@ void ContentFeatures::updateTextures(ITextureSource *tsrc, IShaderSource *shdsrc
 	scene::IMeshManipulator *meshmanip, Client *client, const TextureSettings &tsettings)
 {
 	// minimap pixel color - the average color of a texture
-	if (tsettings.enable_minimap && tiledef[0].name != "")
+	if (tsettings.enable_minimap && !tiledef[0].name.empty())
 		minimap_color = tsrc->getTextureAverageColor(tiledef[0].name);
 
 	// Figure out the actual tiles to use
 	TileDef tdef[6];
 	for (u32 j = 0; j < 6; j++) {
 		tdef[j] = tiledef[j];
-		if (tdef[j].name == "")
+		if (tdef[j].name.empty())
 			tdef[j].name = "unknown_node.png";
 	}
 	// also the overlay tiles
@@ -739,7 +730,7 @@ void ContentFeatures::updateTextures(ITextureSource *tsrc, IShaderSource *shdsrc
 			visual_solidness = 1;
 		} else if (tsettings.leaves_style == LEAVES_SIMPLE) {
 			for (u32 j = 0; j < 6; j++) {
-				if (tdef_spec[j].name != "")
+				if (!tdef_spec[j].name.empty())
 					tdef[j].name = tdef_spec[j].name;
 			}
 			drawtype = NDT_GLASSLIKE;
@@ -748,8 +739,8 @@ void ContentFeatures::updateTextures(ITextureSource *tsrc, IShaderSource *shdsrc
 		} else {
 			drawtype = NDT_NORMAL;
 			solidness = 2;
-			for (u32 i = 0; i < 6; i++)
-				tdef[i].name += std::string("^[noalpha");
+			for (TileDef &td : tdef)
+				td.name += std::string("^[noalpha");
 		}
 		if (waving >= 1)
 			material_type = TILE_MATERIAL_WAVING_LEAVES;
@@ -805,7 +796,7 @@ void ContentFeatures::updateTextures(ITextureSource *tsrc, IShaderSource *shdsrc
 		fillTileAttribs(tsrc, &tiles[j].layers[0], &tdef[j], tile_shader,
 			tsettings.use_normal_texture,
 			tdef[j].backface_culling, material_type);
-		if (tdef_overlay[j].name != "")
+		if (!tdef_overlay[j].name.empty())
 			fillTileAttribs(tsrc, &tiles[j].layers[1], &tdef_overlay[j],
 				overlay_shader, tsettings.use_normal_texture,
 				tdef[j].backface_culling, overlay_material);
@@ -832,7 +823,7 @@ void ContentFeatures::updateTextures(ITextureSource *tsrc, IShaderSource *shdsrc
 			param_type_2 == CPT2_COLORED_WALLMOUNTED)
 		palette = tsrc->getPalette(palette_name);
 
-	if ((drawtype == NDT_MESH) && (mesh != "")) {
+	if (drawtype == NDT_MESH && !mesh.empty()) {
 		// Meshnode drawtype
 		// Read the mesh and apply scale
 		mesh_ptr[0] = client->getMesh(mesh);
@@ -892,7 +883,7 @@ public:
 	CNodeDefManager();
 	virtual ~CNodeDefManager();
 	void clear();
-	virtual IWritableNodeDefManager *clone();
+
 	inline virtual const ContentFeatures& get(content_t c) const;
 	inline virtual const ContentFeatures& get(const MapNode &n) const;
 	virtual bool getId(const std::string &name, content_t &result) const;
@@ -977,11 +968,10 @@ CNodeDefManager::CNodeDefManager()
 CNodeDefManager::~CNodeDefManager()
 {
 #ifndef SERVER
-	for (u32 i = 0; i < m_content_features.size(); i++) {
-		ContentFeatures *f = &m_content_features[i];
-		for (u32 j = 0; j < 24; j++) {
-			if (f->mesh_ptr[j])
-				f->mesh_ptr[j]->drop();
+	for (ContentFeatures &f : m_content_features) {
+		for (auto &j : f.mesh_ptr) {
+			if (j)
+				j->drop();
 		}
 	}
 #endif
@@ -1057,14 +1047,6 @@ void CNodeDefManager::clear()
 }
 
 
-IWritableNodeDefManager *CNodeDefManager::clone()
-{
-	CNodeDefManager *mgr = new CNodeDefManager();
-	*mgr = *this;
-	return mgr;
-}
-
-
 inline const ContentFeatures& CNodeDefManager::get(content_t c) const
 {
 	return c < m_content_features.size()
@@ -1116,10 +1098,9 @@ bool CNodeDefManager::getIds(const std::string &name,
 		return true;
 
 	const GroupItems &items = i->second;
-	for (GroupItems::const_iterator j = items.begin();
-		j != items.end(); ++j) {
-		if ((*j).second != 0)
-			result.insert((*j).first);
+	for (const auto &item : items) {
+		if (item.second != 0)
+			result.insert(item.first);
 	}
 	//printf("getIds: %dus\n", t.stop());
 	return true;
@@ -1141,10 +1122,10 @@ content_t CNodeDefManager::allocateId()
 			id >= m_next_id; // overflow?
 			++id) {
 		while (id >= m_content_features.size()) {
-			m_content_features.push_back(ContentFeatures());
+			m_content_features.emplace_back();
 		}
 		const ContentFeatures &f = m_content_features[id];
-		if (f.name == "") {
+		if (f.name.empty()) {
 			m_next_id = id + 1;
 			return id;
 		}
@@ -1163,9 +1144,8 @@ content_t CNodeDefManager::allocateId()
  */
 void boxVectorUnion(const std::vector<aabb3f> &boxes, aabb3f *box_union)
 {
-	for (std::vector<aabb3f>::const_iterator it = boxes.begin();
-			it != boxes.end(); ++it) {
-		box_union->addInternalBox(*it);
+	for (const aabb3f &box : boxes) {
+		box_union->addInternalBox(box);
 	}
 }
 
@@ -1202,9 +1182,9 @@ void getNodeBoxUnion(const NodeBox &nodebox, const ContentFeatures &features,
 					fabsf(half_processed.MaxEdge.Y),
 					fabsf(half_processed.MaxEdge.Z) };
 				f32 max = 0;
-				for (int i = 0; i < 6; i++) {
-					if (max < coords[i]) {
-						max = coords[i];
+				for (float coord : coords) {
+					if (max < coord) {
+						max = coord;
 					}
 				}
 				// Add the union of all possible rotated boxes
@@ -1226,9 +1206,9 @@ void getNodeBoxUnion(const NodeBox &nodebox, const ContentFeatures &features,
 				fabsf(nodebox.wall_side.MaxEdge.X),
 				fabsf(nodebox.wall_side.MaxEdge.Z) };
 			f32 max = 0;
-			for (int i = 0; i < 4; i++) {
-				if (max < coords[i]) {
-					max = coords[i];
+			for (float coord : coords) {
+				if (max < coord) {
+					max = coord;
 				}
 			}
 			// Add the union of all possible rotated boxes
@@ -1308,18 +1288,16 @@ content_t CNodeDefManager::set(const std::string &name, const ContentFeatures &d
 	// Add this content to the list of all groups it belongs to
 	// FIXME: This should remove a node from groups it no longer
 	// belongs to when a node is re-registered
-	for (ItemGroupList::const_iterator i = def.groups.begin();
-		i != def.groups.end(); ++i) {
-		std::string group_name = i->first;
+	for (const auto &group : def.groups) {
+		const std::string &group_name = group.first;
 
 		std::unordered_map<std::string, GroupItems>::iterator
 			j = m_group_to_items.find(group_name);
 		if (j == m_group_to_items.end()) {
-			m_group_to_items[group_name].push_back(
-				std::make_pair(id, i->second));
+			m_group_to_items[group_name].emplace_back(id, group.second);
 		} else {
 			GroupItems &items = j->second;
-			items.push_back(std::make_pair(id, i->second));
+			items.emplace_back(id, group.second);
 		}
 	}
 	return id;
@@ -1360,7 +1338,7 @@ void CNodeDefManager::removeNode(const std::string &name)
 		}
 
 		// Check if group is empty
-		if (items.size() == 0)
+		if (items.empty())
 			m_group_to_items.erase(iter_groups++);
 		else
 			++iter_groups;
@@ -1373,9 +1351,7 @@ void CNodeDefManager::updateAliases(IItemDefManager *idef)
 	std::set<std::string> all;
 	idef->getAll(all);
 	m_name_id_mapping_with_aliases.clear();
-	for (std::set<std::string>::const_iterator
-			i = all.begin(); i != all.end(); ++i) {
-		const std::string &name = *i;
+	for (const std::string &name : all) {
 		const std::string &convert_to = idef->getAlias(name);
 		content_t id;
 		if (m_name_id_mapping.getId(convert_to, id)) {
@@ -1395,7 +1371,7 @@ void CNodeDefManager::applyTextureOverrides(const std::string &override_filepath
 	int line_c = 0;
 	while (std::getline(infile, line)) {
 		line_c++;
-		if (trim(line) == "")
+		if (trim(line).empty())
 			continue;
 		std::vector<std::string> splitted = str_split(line, ' ');
 		if (splitted.size() != 3) {
@@ -1424,8 +1400,8 @@ void CNodeDefManager::applyTextureOverrides(const std::string &override_filepath
 		else if (splitted[1] == "front")
 			nodedef.tiledef[5].name = splitted[2];
 		else if (splitted[1] == "all" || splitted[1] == "*")
-			for (int i = 0; i < 6; i++)
-				nodedef.tiledef[i].name = splitted[2];
+			for (TileDef &i : nodedef.tiledef)
+				i.name = splitted[2];
 		else if (splitted[1] == "sides")
 			for (int i = 2; i < 6; i++)
 				nodedef.tiledef[i].name = splitted[2];
@@ -1475,7 +1451,7 @@ void CNodeDefManager::serialize(std::ostream &os, u16 protocol_version) const
 				|| i == CONTENT_UNKNOWN)
 			continue;
 		const ContentFeatures *f = &m_content_features[i];
-		if (f->name == "")
+		if (f->name.empty())
 			continue;
 		writeU16(os2, i);
 		// Wrap it in a string to allow different lengths without
@@ -1517,7 +1493,7 @@ void CNodeDefManager::deSerialize(std::istream &is)
 				"not changing builtin node " << i << std::endl;
 			continue;
 		}
-		if (f.name == "") {
+		if (f.name.empty()) {
 			warningstream << "NodeDefManager::deSerialize(): "
 				"received empty name" << std::endl;
 			continue;
@@ -1580,7 +1556,7 @@ void ContentFeatures::serializeOld(std::ostream &os, u16 protocol_version) const
 	TileDef compatible_tiles[6];
 	for (u8 i = 0; i < 6; i++) {
 		compatible_tiles[i] = tiledef[i];
-		if (tiledef_overlay[i].name != "") {
+		if (!tiledef_overlay[i].name.empty()) {
 			std::stringstream s;
 			s << "(" << tiledef[i].name << ")^(" << tiledef_overlay[i].name
 				<< ")";
@@ -1594,19 +1570,18 @@ void ContentFeatures::serializeOld(std::ostream &os, u16 protocol_version) const
 
 		os << serializeString(name);
 		writeU16(os, groups.size());
-		for (ItemGroupList::const_iterator i = groups.begin();
-				i != groups.end(); ++i) {
-			os << serializeString(i->first);
-			writeS16(os, i->second);
+		for (const auto &group : groups) {
+			os << serializeString(group.first);
+			writeS16(os, group.second);
 		}
 		writeU8(os, drawtype);
 		writeF1000(os, compatible_visual_scale);
 		writeU8(os, 6);
-		for (u32 i = 0; i < 6; i++)
-			compatible_tiles[i].serialize(os, protocol_version);
+		for (const auto &compatible_tile : compatible_tiles)
+			compatible_tile.serialize(os, protocol_version);
 		writeU8(os, CF_SPECIAL_COUNT);
-		for (u32 i = 0; i < CF_SPECIAL_COUNT; i++)
-			tiledef_special[i].serialize(os, protocol_version);
+		for (const TileDef &i : tiledef_special)
+			i.serialize(os, protocol_version);
 		writeU8(os, alpha);
 		writeU8(os, post_effect_color.getAlpha());
 		writeU8(os, post_effect_color.getRed());
@@ -1646,9 +1621,8 @@ void ContentFeatures::serializeOld(std::ostream &os, u16 protocol_version) const
 		collision_box.serialize(os, protocol_version);
 		writeU8(os, floodable);
 		writeU16(os, connects_to_ids.size());
-		for (std::set<content_t>::const_iterator i = connects_to_ids.begin();
-				i != connects_to_ids.end(); ++i)
-			writeU16(os, *i);
+		for (content_t connects_to_id : connects_to_ids)
+			writeU16(os, connects_to_id);
 		writeU8(os, connect_sides);
 	} else {
 		throw SerializationError("ContentFeatures::serialize(): "
@@ -1673,12 +1647,12 @@ void ContentFeatures::deSerializeOld(std::istream &is, int version)
 		visual_scale = readF1000(is);
 		if (readU8(is) != 6)
 			throw SerializationError("unsupported tile count");
-		for (u32 i = 0; i < 6; i++)
-			tiledef[i].deSerialize(is, version, drawtype);
+		for (TileDef &i : tiledef)
+			i.deSerialize(is, version, drawtype);
 		if (readU8(is) != CF_SPECIAL_COUNT)
 			throw SerializationError("unsupported CF_SPECIAL_COUNT");
-		for (u32 i = 0; i < CF_SPECIAL_COUNT; i++)
-			tiledef_special[i].deSerialize(is, version, drawtype);
+		for (TileDef &i : tiledef_special)
+			i.deSerialize(is, version, drawtype);
 		alpha = readU8(is);
 		post_effect_color.setAlpha(readU8(is));
 		post_effect_color.setRed(readU8(is));
@@ -1722,8 +1696,8 @@ void ContentFeatures::deSerializeOld(std::istream &is, int version)
 		visual_scale = readF1000(is);
 		if (readU8(is) != 6)
 			throw SerializationError("unsupported tile count");
-		for (u32 i = 0; i < 6; i++)
-			tiledef[i].deSerialize(is, version, drawtype);
+		for (TileDef &i : tiledef)
+			i.deSerialize(is, version, drawtype);
 		// CF_SPECIAL_COUNT in version 6 = 2
 		if (readU8(is) != 2)
 			throw SerializationError("unsupported CF_SPECIAL_COUNT");
@@ -1777,12 +1751,12 @@ void ContentFeatures::deSerializeOld(std::istream &is, int version)
 		visual_scale = readF1000(is);
 		if (readU8(is) != 6)
 			throw SerializationError("unsupported tile count");
-		for (u32 i = 0; i < 6; i++)
-			tiledef[i].deSerialize(is, version, drawtype);
+		for (TileDef &i : tiledef)
+			i.deSerialize(is, version, drawtype);
 		if (readU8(is) != CF_SPECIAL_COUNT)
 			throw SerializationError("unsupported CF_SPECIAL_COUNT");
-		for (u32 i = 0; i < CF_SPECIAL_COUNT; i++)
-			tiledef_special[i].deSerialize(is, version, drawtype);
+		for (TileDef &i : tiledef_special)
+			i.deSerialize(is, version, drawtype);
 		alpha = readU8(is);
 		post_effect_color.setAlpha(readU8(is));
 		post_effect_color.setRed(readU8(is));
@@ -1886,13 +1860,13 @@ void CNodeDefManager::resetNodeResolveState()
 
 void CNodeDefManager::mapNodeboxConnections()
 {
-	for (u32 i = 0; i < m_content_features.size(); i++) {
-		ContentFeatures *f = &m_content_features[i];
-		if ((f->drawtype != NDT_NODEBOX) || (f->node_box.type != NODEBOX_CONNECTED))
+	for (ContentFeatures &f : m_content_features) {
+		if (f.drawtype != NDT_NODEBOX || f.node_box.type != NODEBOX_CONNECTED)
 			continue;
-		for (std::vector<std::string>::iterator it = f->connects_to.begin();
-				it != f->connects_to.end(); ++it) {
-			getIds(*it, f->connects_to_ids);
+
+		for (std::vector<std::string>::const_iterator it = f.connects_to.begin();
+				it != f.connects_to.end(); ++it) {
+			getIds(*it, f.connects_to_ids);
 		}
 	}
 }