X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Flibr2c2%2Ftrackiter.cpp;h=330e2f66c810bd9ee2c38cd0c6f2f1ebd14ae6d7;hb=02453a447bad0ecc2a71e00b9578c9afaee0eadb;hp=3c6295bb974437720b7677cf18bdbadab9136381;hpb=1ff06c5bc46a677fa389ef86c6b26664368f1653;p=r2c2.git

diff --git a/source/libr2c2/trackiter.cpp b/source/libr2c2/trackiter.cpp
index 3c6295b..330e2f6 100644
--- a/source/libr2c2/trackiter.cpp
+++ b/source/libr2c2/trackiter.cpp
@@ -1,12 +1,5 @@
-/* $Id$
-
-This file is part of R²C²
-Copyright © 2010  Mikkosoft Productions, Mikko Rasa
-Distributed under the GPL
-*/
-
 #include <algorithm>
-#include <msp/core/except.h>
+#include "blockiter.h"
 #include "track.h"
 #include "trackiter.h"
 #include "tracktype.h"
@@ -26,24 +19,63 @@ TrackIter::TrackIter(Track *t, unsigned e):
 	_entry(t ? e : 0)
 {
 	if(_track && _entry>_track->get_type().get_endpoints().size())
-		throw InvalidParameterValue("Endpoint index not valid for track");
+		throw out_of_range("TrackIter::TrackIter");
+}
+
+BlockIter TrackIter::block_iter() const
+{
+	if(!_track)
+		return BlockIter();
+
+	Block &block = _track->get_block();
+	const vector<Block::Endpoint> &beps = block.get_endpoints();
+
+	// See if this track matches an endpoint in the block
+	for(unsigned i=0; i<beps.size(); ++i)
+		if(beps[i].track==_track && beps[i].track_ep==_entry)
+			return BlockIter(&block, i);
+
+	if(!_track->get_type().is_turnout())
+	{
+		/* Since there was no endpoint match, the preceding track can't be in a
+		different block. */
+		TrackIter rev = flip();
+		TrackIter last;
+		while(rev && &rev.track()->get_block()==&block)
+		{
+			last = rev;
+			rev = rev.next();
+		}
+
+		// If we ran out of tracks, return an empty iterator
+		if(!rev)
+			return BlockIter();
+
+		TrackIter fwd = last.reverse();
+		for(unsigned i=0; i<beps.size(); ++i)
+			if(beps[i].track==fwd.track() && beps[i].track_ep==fwd.entry())
+				return BlockIter(&block, i);
+	}
+
+	throw logic_error("internal error (didn't find block entry endpoint)");
 }
 
 const TrackType::Endpoint &TrackIter::endpoint() const
 {
 	if(!_track)
-		throw InvalidState("TrackIter is null");
+		throw logic_error("null track");
 
 	return _track->get_type().get_endpoint(_entry);
 }
 
 int TrackIter::get_exit(unsigned path) const
 {
+	path = _track->get_type().coerce_path(_entry, path);
 	const vector<TrackType::Endpoint> &eps = _track->get_type().get_endpoints();
 	
 	// Find an endpoint that's connected to the entry and has the requested path
 	for(unsigned i=0; i<eps.size(); ++i)
-		if(i!=_entry && (eps[i].paths&(1<<path)) && (eps[i].paths&eps[_entry].paths))
+		if(i!=_entry && eps[i].has_path(path) && eps[i].has_common_paths(eps[_entry]))
 			return i;
 
 	return -1;
@@ -68,7 +100,7 @@ TrackIter TrackIter::next(unsigned path) const
 
 	TrackIter result;
 	result._track = _track->get_link(exit);
-	result._entry = (result._track ? result._track->get_endpoint_by_link(*_track) : 0);
+	result._entry = (result._track ? result._track->get_link_slot(*_track) : 0);
 
 	return result;
 }
@@ -100,7 +132,7 @@ TrackIter TrackIter::flip() const
 
 	TrackIter result;
 	result._track = _track->get_link(_entry);
-	result._entry = (result._track ? result._track->get_endpoint_by_link(*_track) : 0);
+	result._entry = (result._track ? result._track->get_link_slot(*_track) : 0);
 
 	return result;
 }
@@ -108,7 +140,7 @@ TrackIter TrackIter::flip() const
 Track &TrackIter::operator*() const
 {
 	if(!_track)
-		throw InvalidState("TrackIter is null");
+		throw logic_error("null track");
 
 	return *_track;
 }