From cf38d0a8208fab7ba7aaafc5eed9a86dfc3722a5 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Thu, 31 Oct 2013 00:21:57 +0200
Subject: [PATCH] Detect conflicting blocks and avoid creating duplicate
 sensors

---
 source/libr2c2/block.cpp | 7 ++++++-
 source/libr2c2/block.h   | 1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/source/libr2c2/block.cpp b/source/libr2c2/block.cpp
index f02762c..33627f8 100644
--- a/source/libr2c2/block.cpp
+++ b/source/libr2c2/block.cpp
@@ -18,6 +18,7 @@ Block::Block(Layout &l, Track &start):
 	id(0),
 	sensor_id(start.get_sensor_id()),
 	turnout_id(start.get_turnout_id()),
+	conflict(false),
 	sensor(0),
 	train(0)
 {
@@ -44,7 +45,11 @@ Block::Block(Layout &l, Track &start):
 
 	determine_id();
 
-	if(sensor_id)
+	const set<Block *> &blocks = layout.get_all<Block>();
+	for(set<Block *>::const_iterator i=blocks.begin(); (!conflict && i!=blocks.end()); ++i)
+		conflict = (id==(*i)->get_id());
+
+	if(!conflict && sensor_id)
 		sensor = new TrackCircuit(layout, *this);
 
 	layout.add(*this);
diff --git a/source/libr2c2/block.h b/source/libr2c2/block.h
index 558d425..c3b7c87 100644
--- a/source/libr2c2/block.h
+++ b/source/libr2c2/block.h
@@ -34,6 +34,7 @@ private:
 	unsigned id;
 	unsigned sensor_id;
 	unsigned turnout_id;
+	bool conflict;
 	TrackCircuit *sensor;
 	std::vector<Endpoint> endpoints;
 	Train *train;
-- 
2.45.2