1 files changed, 100 insertions, 0 deletions
diff --git a/src/utility.cpp b/src/utility.cpp
index 7ffbe7160..87c81cb2a 100644
--- a/src/utility.cpp
+++ b/src/utility.cpp
@@ -276,3 +276,103 @@ std::string translatePassword(std::string playername, std::wstring password)
 
 
 
+PointedThing::PointedThing():
+	type(POINTEDTHING_NOTHING),
+	node_undersurface(0,0,0),
+	node_abovesurface(0,0,0),
+	object_id(-1)
+{}
+
+std::string PointedThing::dump() const
+{
+	std::ostringstream os(std::ios::binary);
+	if(type == POINTEDTHING_NOTHING)
+	{
+		os<<"[nothing]";
+	}
+	else if(type == POINTEDTHING_NODE)
+	{
+		const v3s16 &u = node_undersurface;
+		const v3s16 &a = node_abovesurface;
+		os<<"[node under="<<u.X<<","<<u.Y<<","<<u.Z
+			<< " above="<<a.X<<","<<a.Y<<","<<a.Z<<"]";
+	}
+	else if(type == POINTEDTHING_OBJECT)
+	{
+		os<<"[object "<<object_id<<"]";
+	}
+	else
+	{
+		os<<"[unknown PointedThing]";
+	}
+	return os.str();
+}
+
+void PointedThing::serialize(std::ostream &os) const
+{
+	writeU8(os, 0); // version
+	writeU8(os, (u8)type);
+	if(type == POINTEDTHING_NOTHING)
+	{
+		// nothing
+	}
+	else if(type == POINTEDTHING_NODE)
+	{
+		writeV3S16(os, node_undersurface);
+		writeV3S16(os, node_abovesurface);
+	}
+	else if(type == POINTEDTHING_OBJECT)
+	{
+		writeS16(os, object_id);
+	}
+}
+
+void PointedThing::deSerialize(std::istream &is)
+{
+	int version = readU8(is);
+	if(version != 0) throw SerializationError(
+			"unsupported PointedThing version");
+	type = (PointedThingType) readU8(is);
+	if(type == POINTEDTHING_NOTHING)
+	{
+		// nothing
+	}
+	else if(type == POINTEDTHING_NODE)
+	{
+		node_undersurface = readV3S16(is);
+		node_abovesurface = readV3S16(is);
+	}
+	else if(type == POINTEDTHING_OBJECT)
+	{
+		object_id = readS16(is);
+	}
+	else
+	{
+		throw SerializationError(
+			"unsupported PointedThingType");
+	}
+}
+
+bool PointedThing::operator==(const PointedThing &pt2) const
+{
+	if(type != pt2.type)
+		return false;
+	if(type == POINTEDTHING_NODE)
+	{
+		if(node_undersurface != pt2.node_undersurface)
+			return false;
+		if(node_abovesurface != pt2.node_abovesurface)
+			return false;
+	}
+	else if(type == POINTEDTHING_OBJECT)
+	{
+		if(object_id != pt2.object_id)
+			return false;
+	}
+	return true;
+}
+
+bool PointedThing::operator!=(const PointedThing &pt2) const
+{
+	return !(*this == pt2);
+}