Level 0

src/map/IMG/bitstream.cpp

@@ -1,35 +1,6 @@
 #include "bitstream.h"
 
 
-bool BitStream1::read(int bits, quint32 &val)
-{
-	val = 0;
-
-	for (int pos = 0; pos < bits; ) {
-		if (!_remaining) {
-			if (!_length || !_file.readUInt8(_hdl, _data))
-				return false;
-			_remaining = 8;
-			_length--;
-		}
-
-		quint32 get = bits - pos;
-		if (get >= _remaining) {
-			val |= _data << pos;
-			pos += _remaining;
-			_remaining = 0;
-		} else {
-			quint32 mask = (1<<get) - 1;
-			val |= (_data & mask)<<pos;
-			_data >>= get;
-			_remaining -= get;
-			break;
-		}
-	}
-
-	return true;
-}
-
 bool BitStream1::flush()
 {
 	if (_length && !_file.seek(_hdl, _file.pos(_hdl) + _length))
@@ -41,7 +12,7 @@ bool BitStream1::flush()
 	return true;
 }
 
-bool BitStream4::flush()
+bool BitStream4F::flush()
 {
 	if (_length && !_file.seek(_hdl, _file.pos(_hdl) + _length))
 		return false;
@@ -96,7 +67,14 @@ bool BitStream4R::readBytes(int bytes, quint32 &val)
 		Q_ASSERT(!b);
 	}
 
-	return read(bytes * 8, val);
+	val = 0;
+	for (int i = 0; i < bytes; i++) {
+		if (!read(8, b))
+			return false;
+		val |= (b << (i * 8));
+	}
+
+	return true;
 }
 
 bool BitStream4R::readVUInt32(quint32 &val)
@@ -139,7 +117,7 @@ bool BitStream4R::readVuint32SM(quint32 &val1, quint32 &val2, quint32 &val2Bits)
 		return false;
 
 	if (!(b & 1)) {
-		val1 = b >> 3 & 0x1f;
+		val1 = b >> 3;
 		val2 = b >> 1 & 3;
 		val2Bits = 2;
 	} else {
@@ -188,14 +166,33 @@ bool BitStream4R::skip(quint32 bytes)
 	return true;
 }
 
-void BitStream4R::resize(quint32 length)
+void BitStream4R::resize(quint32 bytes)
 {
-	quint32 ab = (32 - _used)/8;
+	quint32 ab = (32 - (_used + _unused) + 7)/8;
 
-	if (ab < length)
+	if (ab <= bytes)
-		_length = length - ab;
+		_length = bytes - ab;
 	else {
 		_length = 0;
-		_used += length * 8;
+		_unused += (ab - bytes) * 8;
 	}
 }
+
+void BitStream4R::save(State &state)
+{
+	state.pos = _file.pos(_hdl);
+	state.length = _length;
+	state.used = _used;
+	state.unused = _unused;
+	state.data = _data;
+}
+
+bool BitStream4R::restore(const State &state)
+{
+	_length = state.length;
+	_used = state.used;
+	_unused = state.unused;
+	_data = state.data;
+
+	return _file.seek(_hdl, state.pos);
+}

src/map/IMG/bitstream.h

@@ -8,7 +8,7 @@ public:
 	BitStream1(const SubFile &file, SubFile::Handle &hdl, quint32 length)
 	  : _file(file), _hdl(hdl), _length(length), _remaining(0) {}
 
-	bool read(int bits, quint32 &val);
+	template<typename T> bool read(int bits, T &val);
 	bool flush();
 	quint64 bitsAvailable() const {return (quint64)_length * 8 + _remaining;}
 
@@ -25,7 +25,6 @@ public:
 	  : _file(file), _hdl(hdl), _length(length), _used(32), _unused(0),
 	  _data(0) {}
 
-	bool flush();
 	quint64 bitsAvailable() const
 	  {return (quint64)_length * 8 + (32 - _used) - _unused;}
 
@@ -42,10 +41,19 @@ public:
 	  : BitStream4(file, hdl, length) {}
 
 	bool read(int bits, quint32 &val);
+	bool flush();
 };
 
 class BitStream4R : public BitStream4 {
 public:
+	struct State {
+		quint32 pos;
+		quint32 length;
+		quint32 used;
+		quint32 unused;
+		quint32 data;
+	};
+
 	BitStream4R(const SubFile &file, SubFile::Handle &hdl, quint32 length);
 
 	template<typename T> bool read(int bits, T &val);
@@ -54,9 +62,42 @@ public:
 	bool readVuint32SM(quint32 &val1, quint32 &val2, quint32 &val2Bits);
 
 	bool skip(quint32 bytes);
-	void resize(quint32 length);
+	void resize(quint32 bytes);
+	void save(State &state);
+	bool restore(const State &state);
 };
 
+
+template<typename T>
+bool BitStream1::read(int bits, T &val)
+{
+	val = 0;
+
+	for (int pos = 0; pos < bits; ) {
+		if (!_remaining) {
+			if (!_length || !_file.readUInt8(_hdl, _data))
+				return false;
+			_remaining = 8;
+			_length--;
+		}
+
+		quint32 get = bits - pos;
+		if (get >= _remaining) {
+			val |= _data << pos;
+			pos += _remaining;
+			_remaining = 0;
+		} else {
+			quint32 mask = (1<<get) - 1;
+			val |= (_data & mask)<<pos;
+			_data >>= get;
+			_remaining -= get;
+			break;
+		}
+	}
+
+	return true;
+}
+
 template<typename T>
 bool BitStream4R::read(int bits, T &val)
 {

src/map/IMG/huffmanstream.cpp

@@ -28,3 +28,14 @@ bool HuffmanStreamR::init()
 
 	return true;
 }
+
+bool HuffmanStreamR::init(int lonSign, int latSign, quint32 data,
+  quint32 dataSize)
+{
+	_lonSign = lonSign;
+	_latSign = latSign;
+	_symbolData = data;
+	_symbolDataSize = dataSize;
+
+	return true;
+}

src/map/IMG/huffmanstream.h

@@ -11,6 +11,8 @@ public:
 	  : _bs(bitstream), _table(table), _symbolDataSize(0), _symbolData(0),
 	  _lonSign(0), _latSign(0) {}
 
+	bool read(int bits, quint32 &val);
+	bool readSymbol(quint32 &symbol);
 	bool readNext(qint32 &lonDelta, qint32 &latDelta)
 	{
 		if (!(readDelta(_lonSign, lonDelta) && readDelta(_latSign, latDelta)))
@@ -52,7 +54,31 @@ bool HuffmanStream<BitStream>::sign(int &val)
 }
 
 template <class BitStream>
-bool HuffmanStream<BitStream>::readDelta(int sign, qint32 &symbol)
+bool HuffmanStream<BitStream>::read(int bits, quint32 &val)
+{
+	if (_symbolDataSize < (quint32)bits) {
+		quint32 next;
+		quint8 nextSize = qMin((quint64)(32 - _symbolDataSize),
+		  _bs.bitsAvailable());
+
+		if (!_bs.read(nextSize, next))
+			return false;
+
+		_symbolData = (_symbolData << nextSize) | next;
+		_symbolDataSize += nextSize;
+	}
+
+	if (_symbolDataSize < (quint32)bits)
+		return false;
+
+	val = (_symbolData << (32-_symbolDataSize)) >> (32 - bits);
+	_symbolDataSize -= bits;
+
+	return true;
+}
+
+template <class BitStream>
+bool HuffmanStream<BitStream>::readSymbol(quint32 &symbol)
 {
 	quint8 size;
 	quint32 next;
@@ -65,10 +91,19 @@ bool HuffmanStream<BitStream>::readDelta(int sign, qint32 &symbol)
 	_symbolDataSize += nextSize;
 
 	symbol = _table.symbol(_symbolData << (32 - _symbolDataSize), size);
+	if (size > _symbolDataSize)
+		return false;
 
-	if (size <= _symbolDataSize)
 	_symbolDataSize -= size;
-	else
+
+	return true;
+}
+
+template <class BitStream>
+bool HuffmanStream<BitStream>::readDelta(int sign, qint32 &delta)
+{
+	quint32 symbol;
+	if (!readSymbol(symbol))
 		return false;
 
 	if (symbol && !sign) {
@@ -79,7 +114,7 @@ bool HuffmanStream<BitStream>::readDelta(int sign, qint32 &symbol)
 			_symbolDataSize--;
 		}
 	}
-	symbol = sign * symbol;
+	delta = sign * symbol;
 
 	return true;
 }
@@ -100,6 +135,7 @@ public:
 	  : HuffmanStream(bitstream, table) {}
 
 	bool init();
+	bool init(int lonSign, int latSign, quint32 data, quint32 dataSize);
 };
 
 #endif // HUFFMANSTREAM_H

src/map/IMG/netfile.cpp

@@ -2,10 +2,11 @@
 #include "huffmanstream.h"
 #include "subdiv.h"
 #include "nodfile.h"
+#include "lblfile.h"
 #include "netfile.h"
 
 
-bool adjCnts(BitStream4R &bs, QVector<quint16> &cnts, quint16 &mask)
+static bool readAdjCounts(BitStream4R &bs, QVector<quint16> &cnts, quint16 &mask)
 {
 	quint32 val, cnt, bits;
 	if (!bs.read(4, val))
@@ -17,7 +18,6 @@ bool adjCnts(BitStream4R &bs, QVector<quint16> &cnts, quint16 &mask)
 	if (cnt == 5) {
 		if (!bs.read(8, cnt))
 			return false;
-		Q_ASSERT(cnt > 4);
 	}
 
 	if (cnt < 2)
@@ -30,14 +30,25 @@ bool adjCnts(BitStream4R &bs, QVector<quint16> &cnts, quint16 &mask)
 	return true;
 }
 
-bool skipNodes(BitStream4R &bs, const QVector<quint16> &cnts, quint16 mask)
+static bool skipShape(BitStream4R &bs)
 {
-	for (int i = 0; i < cnts.size(); i++) {
-		if (cnts.at(i) & mask) {
 	quint32 v1, v2, v2b;
+
 	if (!bs.readVuint32SM(v1, v2, v2b))
 		return false;
-			if (!bs.skip(v1))
+
+	return bs.skip(v1);
+}
+
+static bool skipAdjShapes(BitStream4R &bs, const QVector<quint16> &cnts,
+  quint16 mask, bool firstIsShape)
+{
+	if (firstIsShape && !skipShape(bs))
+		return false;
+
+	for (int i = 0; i < cnts.size(); i++) {
+		if (cnts.at(i) & mask) {
+			if (!skipShape(bs))
 				return false;
 		}
 	}
@@ -45,7 +56,7 @@ bool skipNodes(BitStream4R &bs, const QVector<quint16> &cnts, quint16 mask)
 	return true;
 }
 
-bool seekToLevel(BitStream4R &bs, quint8 level)
+static bool seekToLevel(BitStream4R &bs, quint8 level)
 {
 	quint32 v1, v2, v2b;
 
@@ -55,7 +66,6 @@ bool seekToLevel(BitStream4R &bs, quint8 level)
 		if (!bs.skip(v1))
 			return false;
 
-		Q_ASSERT(!(v2 & 2));
 		if (v2 & 2)
 			return false;
 		if (v2 & 1)
@@ -65,7 +75,7 @@ bool seekToLevel(BitStream4R &bs, quint8 level)
 	return true;
 }
 
-bool seekToLine(BitStream4R &bs, quint8 line)
+static bool seekToLine(BitStream4R &bs, quint8 line)
 {
 	quint32 v1, v2, v2b;
 
@@ -75,7 +85,6 @@ bool seekToLine(BitStream4R &bs, quint8 line)
 		if (!bs.skip(v1))
 			return false;
 
-		Q_ASSERT(!(v2 & 2));
 		if (v2 & 2)
 			return false;
 	}
@@ -83,87 +92,9 @@ bool seekToLine(BitStream4R &bs, quint8 line)
 	return true;
 }
 
-
+static bool readLine(BitStream4R &bs, const SubDiv *subdiv,
-bool NETFile::init(Handle &hdl)
+  const HuffmanTable &table, IMG::Poly &poly)
 {
-	quint8 multiplier;
-	quint16 hdrLen;
-
-	if (!(seek(hdl, _gmpOffset) && readUInt16(hdl, hdrLen)
-	  && seek(hdl, _gmpOffset + 0x15) && readUInt32(hdl, _offset)
-	  && readUInt32(hdl, _size) && readUInt8(hdl, multiplier)))
-		return false;
-
-	if (hdrLen >= 0x47) {
-		quint32 info;
-		if (!(seek(hdl, _gmpOffset + 0x37) && readUInt32(hdl, info)))
-			return false;
-		_tableId = ((info >> 2) & 0xF);
-
-		if (!(seek(hdl, _gmpOffset + 0x43) && readUInt32(hdl, _linksOffset)
-		  && readUInt32(hdl, _linksSize) && readUInt8(hdl, _linksShift)))
-			return false;
-	}
-
-	_multiplier = 1<<multiplier;
-
-	return true;
-}
-
-bool NETFile::link(const SubDiv *subdiv, Handle &hdl, NODFile *nod,
-  Handle &nodHdl, const NODFile::BlockInfo blockInfo, quint8 linkId,
-  quint8 lineId, const HuffmanTable &table, QList<IMG::Poly> *lines)
-{
-	if (!_multiplier && !init(hdl))
-		return false;
-
-	// TODO
-	if (!subdiv->level())
-		return false;
-
-	NODFile::LinkInfo linkInfo;
-	if (!nod->linkInfo(nodHdl, blockInfo, linkId, linkInfo))
-		return false;
-
-	quint32 linkOffset = _linksOffset + (linkInfo.linkOffset << _linksShift);
-	Q_ASSERT(linkOffset <= _linksOffset + _linksSize);
-
-	quint8 s68 = (linkInfo.flags >> 0x12) & 1;
-	quint8 s69 = (linkInfo.flags >> 0x11) & 1;
-	quint8 s6a = (linkInfo.flags >> 0x13) & 1;
-
-	if (s6a == 1) {
-		QVector<quint16> ca;
-		quint16 mask;
-
-		if (!seek(hdl, linkOffset))
-			return false;
-
-		BitStream4R bs(*this, hdl, linkOffset - _linksOffset);
-		quint32 size;
-
-		if (!bs.readVUInt32(size))
-			return false;
-
-		if (s69 == 0) {
-			if (!adjCnts(bs, ca, mask))
-				return false;
-		}
-		if (s68 == 1) {
-			quint32 v1, v2, v2b;
-			if (!bs.readVuint32SM(v1, v2, v2b))
-				return false;
-			Q_ASSERT(v1);
-			if (!bs.skip(v1))
-				return false;
-		}
-		if (!skipNodes(bs, ca, mask))
-			return false;
-		if (!seekToLevel(bs, subdiv->level()))
-			return false;
-		if (!seekToLine(bs, lineId))
-			return false;
-
 	quint32 v1, v2, v2b;
 	if (!bs.readVuint32SM(v1, v2, v2b))
 		return false;
@@ -175,18 +106,13 @@ bool NETFile::link(const SubDiv *subdiv, Handle &hdl, NODFile *nod,
 	if (2 < v2b)
 		lon |= (v2 >> 2) << (0x12U - v2b);
 
-		QPoint pos = QPoint(LS(subdiv->lon(), 8) + LS((qint16)lon,
+	QPoint pos = QPoint(LS(subdiv->lon(), 8) + LS((qint16)lon, 32-subdiv->bits()),
-		  32-subdiv->bits()), LS(subdiv->lat(), 8) + LS((qint16)lat,
+	  LS(subdiv->lat(), 8) + LS((qint16)lat, 32-subdiv->bits()));
-		  32-subdiv->bits()));
 	Coordinates c(toWGS32(pos.x()), toWGS32(pos.y()));
 
-		IMG::Poly poly;
-		if (!nod->linkType(nodHdl, blockInfo, linkId, poly.type))
-			return false;
 	poly.boundingRect = RectC(c, c);
 	poly.points.append(QPointF(c.lon(), c.lat()));
 
-		Q_ASSERT(_tableId == table.id());
 	HuffmanStreamR stream(bs, table);
 	if (!stream.init())
 		return false;
@@ -203,18 +129,380 @@ bool NETFile::link(const SubDiv *subdiv, Handle &hdl, NODFile *nod,
 		poly.boundingRect = poly.boundingRect.united(c);
 	}
 
-		lines->append(poly);
+	return stream.atEnd();
+}
+
+static bool readNodeGeometry(NODFile *nod, SubFile::Handle &nodHdl,
+  NODFile::AdjacencyInfo &adj, IMG::Poly &poly, quint16 cnt = 0xFFFF)
+{
+	for (int i = 0; i <= cnt; i++) {
+		int ret = nod->nextNode(nodHdl, adj);
+		if (ret < 0)
+			return false;
+		else if (ret > 0)
+			return (cnt == 0xFFFF);
+
+		Coordinates c(toWGS32(adj.nodeInfo.pos.x()),
+		  toWGS32(adj.nodeInfo.pos.y()));
+		poly.points.append(QPointF(c.lon(), c.lat()));
+		poly.boundingRect = poly.boundingRect.united(c);
 	}
 
 	return true;
 }
 
+static bool skipNodes(NODFile *nod, SubFile::Handle &nodHdl,
+  NODFile::AdjacencyInfo &adj, int cnt)
+{
+	for (int i = 0; i < cnt; i++)
+		if (nod->nextNode(nodHdl, adj))
+			return false;
+
+	return true;
+}
+
+static bool readShape(NODFile *nod, SubFile::Handle &nodHdl,
+  NODFile::AdjacencyInfo &adj, BitStream4R &bs, const HuffmanTable &table,
+  const SubDiv *subdiv, quint32 shift, IMG::Poly &poly, quint16 cnt = 0xFFFF,
+  bool check = false)
+{
+	quint32 v1, v2, v2b;
+	if (!bs.readVuint32SM(v1, v2, v2b))
+		return false;
+	BitStream4R::State state;
+	bs.save(state);
+	bs.resize(v1);
+
+	quint32 flags;
+	if (!bs.read(8, flags))
+		return false;
+	flags |= (v2 << 8);
+
+	bool hasCoordinatesAdjustBit = flags & (1 << (v2b + 7));
+	bool useEosBit = flags & (1 << (v2b + 5));
+	bool startWithStream = flags & (1 << (v2b + 6));
+
+	quint32 extraBits;
+	int lonSign, latSign;
+
+	if ((flags >> (v2b + 4) & 1) == 0) {
+		extraBits = v2b + 4;
+		lonSign = 0;
+	} else {
+		extraBits = v2b + 3;
+		lonSign = 1;
+		if ((flags >> (v2b + 3) & 1) != 0) {
+			lonSign = -1;
+		}
+	}
+	extraBits -= 1;
+	if ((flags >> extraBits & 1) == 0) {
+		latSign = 0;
+	} else {
+		extraBits -= 1;
+		latSign = -1;
+		if ((flags >> extraBits & 1) == 0) {
+			latSign = 1;
+		}
+	}
+
+	if (nod->nextNode(nodHdl, adj))
+		return false;
+	QPoint pos(adj.nodeInfo.pos);
+	quint16 nodes = 0;
+
+	if (!startWithStream) {
+		Coordinates c(toWGS32(adj.nodeInfo.pos.x()),
+		  toWGS32(adj.nodeInfo.pos.y()));
+		poly.points.append(QPointF(c.lon(), c.lat()));
+		poly.boundingRect = poly.boundingRect.united(c);
+
+		while (!(adj.flags & 1)) {
+			int ret = nod->nextNode(nodHdl, adj);
+			if (ret < 0)
+				return false;
+			else if (ret > 0)
+				break;
+			nodes++;
+
+			c = Coordinates(toWGS32(adj.nodeInfo.pos.x()),
+			  toWGS32(adj.nodeInfo.pos.y()));
+			poly.points.append(QPointF(c.lon(), c.lat()));
+			poly.boundingRect = poly.boundingRect.united(c);
+			pos = adj.nodeInfo.pos;
+		}
+	}
+
+	HuffmanStreamR stream(bs, table);
+	if (!stream.init(lonSign, latSign, flags, extraBits))
+		return false;
+	qint32 lonDelta, latDelta;
+	QVector<QPoint> deltas;
+
+	quint32 adjustBit = 0;
+	quint32 stepsCnt = 0;
+	quint32 steps = 0;
+	quint32 eos = 0;
+
+	while (true) {
+		if ((stepsCnt == steps) && !useEosBit) {
+			if (!stream.readSymbol(steps))
+				break;
+			if (!steps)
+				break;
+		}
+
+		if (!stream.readNext(lonDelta, latDelta))
+			break;
+
+		if (hasCoordinatesAdjustBit && !stream.read(1, adjustBit))
+			return false;
+
+		stepsCnt++;
+
+		if (useEosBit) {
+			if (!stream.read(1, eos))
+				return false;
+		} else {
+			if (steps == stepsCnt)
+				eos = 1;
+		}
+
+		if (!startWithStream) {
+			pos.rx() += LS(lonDelta, 32-subdiv->bits()-shift);
+			pos.ry() += LS(latDelta, 32-subdiv->bits()-shift);
+
+			Coordinates c(toWGS32(pos.x()), toWGS32(pos.y()));
+			poly.points.append(QPointF(c.lon(), c.lat()));
+			poly.boundingRect = poly.boundingRect.united(c);
+		} else {
+			deltas.append(QPoint(lonDelta, latDelta));
+			poly.points.append(QPointF());
+		}
+
+		if (startWithStream && eos) {
+			for (int i = deltas.size() - 1, j = 0; i >= 0; i--, j++) {
+				pos.rx() -= LS(deltas.at(i).x(), 32-subdiv->bits()-shift);
+				pos.ry() -= LS(deltas.at(i).y(), 32-subdiv->bits()-shift);
+
+				Coordinates c(toWGS32(pos.x()), toWGS32(pos.y()));
+				poly.points[poly.points.size() - 1 - j] = QPointF(c.lon(), c.lat());
+				poly.boundingRect = poly.boundingRect.united(c);
+			}
+
+			pos = adj.nodeInfo.pos;
+			Coordinates c(toWGS32(pos.x()), toWGS32(pos.y()));
+			poly.points.append(QPointF(c.lon(), c.lat()));
+			poly.boundingRect = poly.boundingRect.united(c);
+
+			stepsCnt = 0;
+			steps = 0;
+			startWithStream = false;
+
+			if (adj.flags & 1)
+				eos = 0;
+		}
+
+		if (eos) {
+			if (nodes >= cnt)
+				break;
+
+			do {
+				int ret = nod->nextNode(nodHdl, adj);
+				if (ret < 0)
+					return false;
+				else if (ret > 0)
+					break;
+				nodes++;
+
+				if (check && nodes == cnt) {
+					if (!(bs.restore(state) && bs.skip(v1)
+					  && bs.readVuint32SM(v1, v2, v2b)))
+						return false;
+					if (5 < v2b)
+						v2 >>= v2b - 2;
+					if (v2 & 1)
+						break;
+				}
+
+				Coordinates c(toWGS32(adj.nodeInfo.pos.x()),
+				  toWGS32(adj.nodeInfo.pos.y()));
+				poly.points.append(QPointF(c.lon(), c.lat()));
+				poly.boundingRect = poly.boundingRect.united(c);
+				pos = adj.nodeInfo.pos;
+			} while (!(adj.flags & 1) && nodes < cnt);
+
+			if (nodes == cnt)
+				break;
+
+			steps = 0;
+			stepsCnt = 0;
+			eos = 0;
+		}
+	}
+
+	return true;
+}
+
+
+bool NETFile::linkLabel(Handle &hdl, quint32 offset, quint32 size, LBLFile *lbl,
+  Handle &lblHdl, Label &label)
+{
+	if (!seek(hdl, offset))
+		return false;
+	BitStream1 bs(*this, hdl, size);
+
+	quint32 flags, b, labelPtr = 0;
+	if (!bs.read(8, flags))
+		return false;
+	for (int i = 0; i < 3; i++) {
+		if (!bs.read(8, b))
+			return false;
+		labelPtr |= (b << (i * 8));
+	}
+
+	if (lbl && (labelPtr & 0x3FFFFF)) {
+		if (labelPtr & 0x400000) {
+			quint32 lblOff;
+			if (lblOffset(hdl, labelPtr & 0x3FFFFF, lblOff) && lblOff)
+				label = lbl->label(lblHdl, lblOff);
+
+		} else
+			label = lbl->label(lblHdl, labelPtr & 0x3FFFFF);
+	}
+
+	return true;
+}
+
+bool NETFile::init(Handle &hdl)
+{
+	quint16 hdrLen;
+
+	if (!(seek(hdl, _gmpOffset) && readUInt16(hdl, hdrLen)
+	  && seek(hdl, _gmpOffset + 0x15) && readUInt32(hdl, _offset)
+	  && readUInt32(hdl, _size) && readUInt8(hdl, _shift)))
+		return false;
+
+	if (hdrLen >= 0x47) {
+		quint32 info;
+		if (!(seek(hdl, _gmpOffset + 0x37) && readUInt32(hdl, info)))
+			return false;
+		_tableId = ((info >> 2) & 0xF);
+
+		if (!(seek(hdl, _gmpOffset + 0x43) && readUInt32(hdl, _linksOffset)
+		  && readUInt32(hdl, _linksSize) && readUInt8(hdl, _linksShift)))
+			return false;
+	}
+
+	_init = true;
+
+	return true;
+}
+
+bool NETFile::link(const SubDiv *subdiv, quint32 shift, Handle &hdl,
+  NODFile *nod, Handle &nodHdl, LBLFile *lbl, Handle &lblHdl,
+  const NODFile::BlockInfo blockInfo, quint8 linkId, quint8 lineId,
+  const HuffmanTable &table, QList<IMG::Poly> *lines)
+{
+	if (!_init && !init(hdl))
+		return false;
+
+	Q_ASSERT(_tableId == table.id());
+	if (_tableId != table.id())
+		return false;
+
+	IMG::Poly poly;
+	if (!nod->linkType(nodHdl, blockInfo, linkId, poly.type))
+		return false;
+
+	NODFile::LinkInfo linkInfo;
+	if (!nod->linkInfo(nodHdl, blockInfo, linkId, linkInfo))
+		return false;
+
+	quint32 linkOffset = _linksOffset + (linkInfo.linkOffset << _linksShift);
+	if (linkOffset > _linksOffset + _linksSize)
+		return false;
+	if (!seek(hdl, linkOffset))
+		return false;
+	BitStream4R bs(*this, hdl, linkOffset - _linksOffset);
+	QVector<quint16> ca;
+	quint16 mask = 0;
+	quint32 size;
+
+	quint8 s68 = (linkInfo.flags >> 0x12) & 1;
+	quint8 s69 = (linkInfo.flags >> 0x11) & 1;
+	quint8 s6a = (linkInfo.flags >> 0x13) & 1;
+
+	if (s69 == 0 || s6a == 1) {
+		if (!bs.readVUInt32(size))
+			return false;
+	}
+	if (s69 == 0) {
+		if (!readAdjCounts(bs, ca, mask))
+			return false;
+	}
+
+	if (!subdiv->level()) {
+		NODFile::AdjacencyInfo adj(nod, blockInfo, linkId, linkInfo);
+
+		if (s69 == 1) {
+			if (s68 == 1) {
+				if (!readShape(nod, nodHdl, adj, bs, table, subdiv, shift, poly))
+					return false;
+			} else {
+				if (!readNodeGeometry(nod, nodHdl, adj, poly))
+					return false;
+			}
+		} else {
+			quint16 mask2 = mask + 0xffff;
+			for (int i = 0; i <= ca.size(); i++) {
+				quint16 step = (i < ca.size()) ? ca.at(i) & mask2 : 0xFFFF;
+				bool shape = (i > 0) ? ca.at(i-1) & mask : (s68 == 1);
+				if (i == lineId) {
+					if (shape) {
+						bool check = (i < ca.size()) ? (ca.at(i) & mask) : false;
+						if (!readShape(nod, nodHdl, adj, bs, table, subdiv,
+						  shift, poly, step, check))
+							return false;
+					} else {
+						if (!readNodeGeometry(nod, nodHdl, adj, poly, step))
+							return false;
+					}
+					break;
+				}
+
+				if (shape && !skipShape(bs))
+					return false;
+				if (!skipNodes(nod, nodHdl, adj, step))
+					return false;
+			}
+		}
+	} else {
+		if (!skipAdjShapes(bs, ca, mask, s68 == 1))
+			return false;
+
+		if (!seekToLevel(bs, subdiv->level()))
+			return false;
+		if (!seekToLine(bs, lineId))
+			return false;
+		if (!readLine(bs, subdiv, table, poly))
+			return false;
+	}
+
+	linkLabel(hdl, linkOffset, _linksSize - (linkOffset - _linksOffset), lbl,
+	  lblHdl, poly.label);
+
+	lines->append(poly);
+
+	return true;
+}
+
 bool NETFile::lblOffset(Handle &hdl, quint32 netOffset, quint32 &lblOffset)
 {
-	if (!_multiplier && !init(hdl))
+	if (!_init && !init(hdl))
 		return false;
 
-	if (!(seek(hdl, _offset + netOffset * _multiplier)
+	if (!(seek(hdl, _offset + (netOffset << _shift))
 	  && readUInt24(hdl, lblOffset)))
 		return false;
 

src/map/IMG/netfile.h

@@ -14,24 +14,29 @@ class NETFile : public SubFile
 {
 public:
 	NETFile(IMG *img) : SubFile(img), _offset(0), _size(0), _linksOffset(0),
-	  _linksSize(0), _multiplier(0), _linksShift(0) {}
+	  _linksSize(0), _shift(0), _linksShift(0), _init(false) {}
 	NETFile(const QString &path) : SubFile(path), _offset(0), _size(0),
-	  _linksOffset(0), _linksSize(0), _multiplier(0), _linksShift(0) {}
+	  _linksOffset(0), _linksSize(0), _shift(0), _linksShift(0),
+	  _init(false) {}
 	NETFile(SubFile *gmp, quint32 offset) : SubFile(gmp, offset),
-	  _offset(0), _size(0), _linksOffset(0), _linksSize(0), _multiplier(0),
+	  _offset(0), _size(0), _linksOffset(0), _linksSize(0), _shift(0),
-	  _linksShift(0) {}
+	  _linksShift(0), _init(false) {}
 
 	bool lblOffset(Handle &hdl, quint32 netOffset, quint32 &lblOffset);
-	bool link(const SubDiv *subdiv, Handle &hdl, NODFile *nod, Handle &nodHdl,
+	bool link(const SubDiv *subdiv, quint32 shift, Handle &hdl, NODFile *nod,
+	  Handle &nodHdl, LBLFile *lbl, Handle &lblHdl,
 	  const NODFile::BlockInfo blockInfo, quint8 linkId, quint8 lineId,
 	  const HuffmanTable &table, QList<IMG::Poly> *lines);
 
 private:
 	bool init(Handle &hdl);
+	bool linkLabel(Handle &hdl, quint32 offset, quint32 size, LBLFile *lbl,
+	  Handle &lblHdl, Label &label);
 
 	quint32 _offset, _size, _linksOffset, _linksSize;
-	quint8 _multiplier, _linksShift;
+	quint8 _shift, _linksShift;
 	quint8 _tableId;
+	bool _init;
 };
 
 #endif // NETFILE_H

src/map/IMG/nodfile.cpp

@@ -1,6 +1,81 @@
 #include "bitstream.h"
 #include "nodfile.h"
 
+
+#define ARRAY_SIZE(array) \
+  (sizeof(array) / sizeof(array[0]))
+
+static const struct {
+	quint8 lon;
+	quint8 lat;
+} LLBITS[] = {
+	{0xc, 0xc}, {0x8, 0x10}, {0x10, 0x8}, {0x10, 0x10}, {0xc, 0x14},
+	{0x14, 0xc}, {0x14, 0x14}
+};
+
+union NodeShift {
+	qint32 offset;
+	quint8 id;
+};
+
+static bool adjDistInfo(BitStream1 &bs, bool extraBit, quint8 &flags)
+{
+	quint32 data, cnt;
+
+	if (!bs.read(extraBit | 8, data))
+		return false;
+
+	data <<= !extraBit;
+	flags |= (quint8)data & 1;
+	data >>= 1;
+
+	for (cnt = 0; (data >> cnt) & 1; cnt++) {
+		if (cnt == 4)
+			break;
+	}
+	if (!bs.read(cnt * 4, data))
+		return false;
+
+	return true;
+}
+
+static bool adjNodeInfo(BitStream1 &bs, bool extraBit, NodeShift &shift,
+  quint8 &flags)
+{
+	quint32 data;
+
+	if (!bs.read(9, data))
+		return false;
+
+	data <<= !extraBit;
+
+	if (data & 1)
+		shift.id = data >> 1;
+	else {
+		quint32 bits = (data >> 1) & 7;
+		quint32 data2;
+		flags |= 2;
+
+		if (!bs.read(bits + extraBit + 1, data2))
+			return false;
+
+		data = data2 << (6 - extraBit) | data >> 4;
+		bits = 0x19 - bits;
+		shift.offset = ((qint32)(data << bits) >> bits);
+	}
+
+	return true;
+}
+
+static bool skipOptAdjData(BitStream1 &bs)
+{
+	// TODO
+	Q_UNUSED(bs);
+	Q_ASSERT(false);
+	return false;
+}
+
+
 bool NODFile::init(Handle &hdl)
 {
 	quint16 hdrLen;
@@ -9,9 +84,10 @@ bool NODFile::init(Handle &hdl)
 		return false;
 
 	if (hdrLen >= 0x7b) {
-		if (!(seek(hdl, _gmpOffset + 0x21) && readUInt8(hdl, _blockShift)
+		if (!(seek(hdl, _gmpOffset + 0x1d) && readUInt32(hdl, _flags)
-		  && readUInt8(hdl, _nodeShift)))
+		  && readUInt8(hdl, _blockShift) && readUInt8(hdl, _nodeShift)))
 			return false;
+
 		if (!(seek(hdl, _gmpOffset + 0x67) && readUInt32(hdl, _blockOffset)
 		  && readUInt32(hdl, _blockSize) && readUInt16(hdl, _blockRecordSize)
 		  && readUInt32(hdl, _indexOffset) && readUInt32(hdl, _indexSize)
@@ -38,42 +114,49 @@ quint32 NODFile::indexIdSize(Handle &hdl)
 		return 0;
 }
 
-bool NODFile::blockInfo(Handle &hdl, quint32 blockIndexId,
+bool NODFile::readBlock(Handle &hdl, quint32 blockOffset,
   BlockInfo &blockInfo) const
 {
-	quint32 blockOffset;
+	blockInfo.offset = blockOffset;
-	quint32 offset = _indexRecordSize * blockIndexId + _indexOffset;
-	quint32 offsetSize = (_indexFlags & 3) + 1;
 
-
+	if (!(seek(hdl, blockInfo.offset + _blockOffset)
-	Q_ASSERT(offset <= _indexOffset + _indexSize);
+	  && readUInt16(hdl, blockInfo.hdr.s0) && readUInt32(hdl, blockInfo.hdr.s2)
-	if (!(seek(hdl, offset) && readVUInt32(hdl, offsetSize, blockOffset)))
+	  && readUInt32(hdl, blockInfo.hdr.s6) && readUInt32(hdl, blockInfo.hdr.sa)
-		return false;
+	  && readUInt16(hdl, blockInfo.hdr.se) && readUInt8(hdl, blockInfo.hdr.s10)
-
+	  && readUInt8(hdl, blockInfo.hdr.s11) && readUInt8(hdl, blockInfo.hdr.s12)))
-	blockInfo.offset = (blockOffset << _blockShift) + _blockOffset;
-
-	if (!(seek(hdl, blockInfo.offset) && readUInt16(hdl, blockInfo.h0)
-	  && readUInt32(hdl, blockInfo.h2) && readUInt32(hdl, blockInfo.h6)
-	  && readUInt32(hdl, blockInfo.ha) && readUInt16(hdl, blockInfo.he)
-	  && readUInt8(hdl, blockInfo.h10) && readUInt8(hdl, blockInfo.h11)
-	  && readUInt8(hdl, blockInfo.h12)))
 		return false;
 
 	return true;
 }
 
+bool NODFile::blockInfo(Handle &hdl, quint32 blockId, BlockInfo &blockInfo) const
+{
+	quint32 blockOffset;
+	quint32 offset = _indexRecordSize * blockId + _indexOffset;
+	quint32 offsetSize = (_indexFlags & 3) + 1;
+
+	if (offset > _indexOffset + _indexSize)
+		return false;
+	if (!(seek(hdl, offset) && readVUInt32(hdl, offsetSize, blockOffset)))
+		return false;
+
+	return readBlock(hdl, blockOffset << _blockShift, blockInfo);
+}
+
 bool NODFile::linkInfo(Handle &hdl, const BlockInfo &blockInfo, quint32 linkId,
   LinkInfo &linkInfo) const
 {
-	Q_ASSERT(linkId < blockInfo.h10);
+	if (linkId >= blockInfo.hdr.s10)
+		return false;
 
-	quint32 infoOffset = ((blockInfo.he * linkId) >> 3) + 0x13
+	quint32 infoOffset = ((blockInfo.hdr.se * linkId) >> 3) + 0x13
-	  + ((blockInfo.h0 >> 0xb) & 1) + blockInfo.offset;
+	  + ((blockInfo.hdr.s0 >> 0xb) & 1) + blockInfo.offset + _blockOffset;
-	quint32 s1 = ((blockInfo.h0 >> 2) & 0x1f) + 8;
+	quint32 s1 = ((blockInfo.hdr.s0 >> 2) & 0x1f) + 8;
-	quint32 s2 = (blockInfo.h0 >> 7) & 0xf;
+	quint32 s2 = (blockInfo.hdr.s0 >> 7) & 0xf;
-	quint32 skip = (blockInfo.he * linkId) & 7;
+	quint32 skip = (blockInfo.hdr.se * linkId) & 7;
 
-	Q_ASSERT(infoOffset <= _blockOffset + _blockSize);
+	if (infoOffset > _blockOffset + _blockSize || infoOffset < blockInfo.offset)
+		return false;
 	if (!seek(hdl, infoOffset))
 		return false;
 
@@ -90,20 +173,340 @@ bool NODFile::linkInfo(Handle &hdl, const BlockInfo &blockInfo, quint32 linkId,
 	} else {
 		if (!bs.read(s1 - s2, linkInfo.linkOffset))
 			return false;
-		linkInfo.linkOffset += blockInfo.ha;
+		linkInfo.linkOffset += blockInfo.hdr.sa;
 	}
 
+	if (!bs.read(s2, linkInfo.nodeOffset))
+		return false;
+	linkInfo.nodeOffset = (blockInfo.offset - linkInfo.nodeOffset)
+	  >> _nodeShift;
+
 	return true;
 }
 
+bool NODFile::nodeInfo(Handle &hdl, const BlockInfo &blockInfo,
+  quint32 nodeOffset, NodeInfo &nodeInfo) const
+{
+	quint32 infoOffset = (nodeOffset << _nodeShift) + _blockOffset;
+	if (infoOffset > _blockOffset + _blockSize || infoOffset < blockInfo.offset)
+		return false;
+	if (!seek(hdl, infoOffset))
+		return false;
+
+	BitStream1 bs(*this, hdl, _blockOffset + _blockSize - infoOffset);
+
+	if (!bs.read(8, nodeInfo.flags))
+		return false;
+
+	if ((nodeInfo.flags & 7) >= ARRAY_SIZE(LLBITS))
+		return false;
+	quint8 lonBits = LLBITS[nodeInfo.flags & 7].lon;
+	quint8 latBits = LLBITS[nodeInfo.flags & 7].lat;
+	quint8 maxBits = ((_flags >> 10) & 7) | 0x18;
+
+	quint32 lon, lat;
+	if (!(bs.read(lonBits, lon) && bs.read(latBits, lat)))
+		return false;
+
+	quint8 lonShift = 0x20 - lonBits;
+	quint8 latShift = 0x20 - latBits;
+	quint8 shift = 0x20 - maxBits;
+	QPoint pos((((int)(lon << lonShift) >> lonShift) << shift)
+	  + blockInfo.hdr.s2, (((int)(lat << latShift) >> latShift) << shift)
+	  + blockInfo.hdr.s6);
+	nodeInfo.bytes = ((lonBits + latBits) >> 3) + 1;
+
+	if ((maxBits < 0x1c) && (nodeInfo.flags & 8)) {
+		quint8 extraBits = 0x1c - maxBits;
+		quint32 extraLon, extraLat;
+
+		if (!(bs.read(extraBits, extraLon) && bs.read(extraBits, extraLat)))
+			return false;
+		pos.setX(pos.x() | extraLon << 4); pos.setY(pos.y() | extraLat << 4);
+		nodeInfo.bytes++;
+	}
+	// TODO?: extra bits
+
+	nodeInfo.pos = pos;
+	nodeInfo.flags &= 0xf8;
+
+	return true;
+}
+
+bool NODFile::nodeOffset(Handle &hdl, const BlockInfo &blockInfo,
+  quint8 nodeId, quint32 &nodeOffset) const
+{
+	if (nodeId >= blockInfo.hdr.s11)
+		return false;
+
+	quint32 offset = ((blockInfo.hdr.s10 * blockInfo.hdr.se + 7) >> 3)
+	  + 0x13 + nodeId * 3 + _blockOffset + blockInfo.offset
+	  + ((blockInfo.hdr.s0 >> 0xb) & 1);
+
+	if (!(seek(hdl, offset) && readUInt24(hdl, nodeOffset)))
+		return false;
+
+	return true;
+}
+
+bool NODFile::nodeBlock(Handle &hdl, quint32 nodeOffset,
+  BlockInfo &blockInfo) const
+{
+	int low = 0;
+	int high = _indexSize / _indexRecordSize - 1;
+	quint32 offsetSize = (_indexFlags & 3) + 1;
+
+	while (low <= high) {
+		quint32 m = ((low + high) / 2);
+		quint32 offset = _indexRecordSize * m + _indexOffset;
+		quint32 blockOffset, prevBlockOffset;
+
+		if (m > 0) {
+			if (!(seek(hdl, offset - _indexRecordSize)
+			  && readVUInt32(hdl, offsetSize, prevBlockOffset)
+			  && readVUInt32(hdl, offsetSize, blockOffset)))
+				return false;
+		} else {
+			if (!(seek(hdl, offset)
+			  && readVUInt32(hdl, offsetSize, blockOffset)))
+				return false;
+			prevBlockOffset = 0;
+		}
+		prevBlockOffset <<= _blockShift;
+		blockOffset <<= _blockShift;
+
+		if (blockOffset < nodeOffset)
+			low = m + 1;
+		else {
+			if (prevBlockOffset <= nodeOffset)
+				return readBlock(hdl, blockOffset, blockInfo);
+			else
+				high = m - 1;
+		}
+	}
+
+	return false;
+}
+
+bool NODFile::absAdjInfo(Handle &hdl, AdjacencyInfo &adj) const
+{
+	quint32 infoOffset = (adj.nodeOffset << _nodeShift) + _blockOffset
+	  + adj.nodeInfo.bytes;
+	if (!seek(hdl, infoOffset))
+		return false;
+	BitStream1 bs(*this, hdl, _blockOffset + _blockSize - infoOffset);
+
+	quint8 linkId = adj.blockInfo.hdr.s10;
+	quint32 m2p = 2;
+	quint32 skip = 8;
+	quint32 flags;
+	quint32 nextOffset;
+	bool extraBit = (adj.nodeInfo.flags >> 6) & 1;
+	bool linkIdValid = true;
+	bool firstLoop = true;
+
+	do {
+		adj.flags = 0;
+
+		if (!bs.read(8, flags))
+			return false;
+
+		if (firstLoop) {
+			skip >>= (flags >> 5) & 1;
+			flags |= 0x20;
+		}
+		firstLoop = false;
+		quint32 f4 = flags & 0x10;
+		quint32 f4sn = (f4 >> 4) ^ 1;
+		quint32 m1 = (flags >> 5) & f4sn;
+		quint32 m2 = (f4 >> 3) | (f4sn & (flags >> 6));
+
+		if (m1) {
+			if (!bs.read(8, linkId))
+				return false;
+			linkIdValid = true;
+		}
+
+		if ((m2 != m2p) || (flags & 0x10) || m1) {
+			quint32 data;
+			if (!bs.read(skip, data))
+				return false;
+		}
+
+		if (!(flags & 0x10)) {
+			if (!adjDistInfo(bs, (m2 == 1 && linkIdValid), adj.flags))
+				return false;
+
+			NodeShift shift;
+			if (!adjNodeInfo(bs, extraBit, shift, adj.flags))
+				return false;
+			if (adj.flags & 2)
+				nextOffset = adj.nodeOffset + shift.offset;
+			else if (!nodeOffset(adj.extHdl, adj.blockInfo, shift.id, nextOffset))
+				return false;
+
+			m2p = m2;
+		}
+
+		if (flags & 0x8) {
+			quint32 data;
+			if (!bs.read(8, data))
+				return false;
+			if (!(data & 0xe0)) {
+				if (!bs.read(8, data))
+					return false;
+			}
+		}
+
+		if ((_flags & 0x18) && !skipOptAdjData(bs))
+			return false;
+
+		if ((m2 == 1) && linkIdValid) {
+			LinkInfo li;
+			if (adj.linkId == 0xFFFFFFFF) {
+				if (!linkInfo(adj.extHdl, adj.blockInfo, linkId, li))
+					return false;
+			} else
+				li.linkOffset = 0xFFFFFFFF;
+
+			if ((adj.linkOffset == li.linkOffset) || (adj.linkId == linkId)) {
+				adj.nodeOffset = nextOffset;
+				if (!(adj.flags & 2)) {
+					adj.linkId = 0xFFFFFFFF;
+					return nodeBlock(hdl, adj.nodeOffset << _nodeShift,
+					  adj.blockInfo);
+				} else {
+					adj.linkId = linkId;
+					return true;
+				}
+			}
+
+			linkIdValid = false;
+		}
+	} while (!(flags & 0x80));
+
+	adj.nodeOffset = 0xFFFFFFFF;
+
+	return true;
+}
+
+bool NODFile::relAdjInfo(Handle &hdl, AdjacencyInfo &adj) const
+{
+	quint32 infoOffset = (adj.nodeOffset << _nodeShift) + _blockOffset
+	  + adj.nodeInfo.bytes;
+	if (!seek(hdl, infoOffset))
+		return false;
+
+	BitStream1 bs(*this, hdl, _blockOffset + _blockSize - infoOffset);
+
+	quint32 linkId = adj.blockInfo.hdr.s10;
+	quint32 skip = 8;
+	quint32 flagsBits = 8;
+	quint32 flags;
+	quint32 nextOffset;
+	bool extraBit = (adj.nodeInfo.flags >> 6) & 1;
+	bool linkIdValid = true;
+	bool firstLoop = true;
+
+	do {
+		adj.flags = 0;
+
+		if (!bs.read(flagsBits, flags))
+			return false;
+
+		flags <<= (8U - flagsBits);
+		if (firstLoop) {
+			skip >>= (flags >> 5) & 1;
+			flags = ((flags >> 1) & 0x20) | (flags & 0xffffffdf);
+		}
+		firstLoop = false;
+		flagsBits >>= (flags >> 3) & 1;
+		quint32 m = (((flags & 0x70) == 0x30) << 1) | ((flags >> 6) & 1);
+		if (!m) {
+			adj.nodeOffset = 0xFFFFFFFF;
+			return true;
+		}
+
+		if ((flags & 0x60) == 0x60) {
+			if (!bs.read(8, linkId))
+				return false;
+			linkIdValid = true;
+		}
+
+		if (((flags & 0x70) == 0x70)) {
+			quint32 data;
+			if (!bs.read(skip, data))
+				return false;
+		}
+
+		if ((flags & 0x50) == 0x50) {
+			if (!adjDistInfo(bs, false, adj.flags))
+				return false;
+			adj.flags |= 1;
+		}
+		if ((flags >> 6) & 1) {
+			NodeShift shift;
+			if (!adjNodeInfo(bs, extraBit, shift, adj.flags))
+				return false;
+			if (adj.flags & 2)
+				nextOffset = adj.nodeOffset + shift.offset;
+			else if (!nodeOffset(adj.extHdl, adj.blockInfo, shift.id, nextOffset))
+				return false;
+		}
+
+		if ((_flags & 0x18) && !skipOptAdjData(bs))
+			return false;
+
+		if (((m == 1) && linkIdValid)) {
+			LinkInfo li;
+			if (adj.linkId == 0xFFFFFFFF) {
+				if (!linkInfo(adj.extHdl, adj.blockInfo, linkId, li))
+					return false;
+			} else
+				li.linkOffset = 0xFFFFFFFF;
+
+			if ((adj.linkOffset == li.linkOffset) || (adj.linkId == linkId)) {
+				adj.nodeOffset = nextOffset;
+				if (!(adj.flags & 2)) {
+					adj.linkId = 0xFFFFFFFF;
+					return nodeBlock(hdl, adj.nodeOffset << _nodeShift,
+					  adj.blockInfo);
+				} else {
+					adj.linkId = linkId;
+					return true;
+				}
+			}
+			linkIdValid = false;
+		}
+	} while (!(flags & 0x80));
+
+	adj.nodeOffset = 0xFFFFFFFF;
+
+	return true;
+}
+
+int NODFile::nextNode(Handle &hdl, AdjacencyInfo &adjInfo)
+{
+	if (adjInfo.nodeOffset == 0xFFFFFFFF)
+		return 1;
+
+	if (!nodeInfo(hdl, adjInfo.blockInfo, adjInfo.nodeOffset,
+	  adjInfo.nodeInfo))
+		return -1;
+	if (!adjacencyInfo(hdl, adjInfo))
+		return -1;
+
+	return 0;
+}
+
 bool NODFile::linkType(Handle &hdl, const BlockInfo &blockInfo, quint8 linkId,
   quint32 &type) const
 {
-	quint32 offset = ((blockInfo.h10 * blockInfo.he + 7) >> 3) + 0x13 +
+	quint32 offset = ((blockInfo.hdr.s10 * blockInfo.hdr.se + 7) >> 3) + 0x13
-	  blockInfo.offset + ((blockInfo.h0 >> 0xb) & 1) + (quint32)blockInfo.h11
+	  + blockInfo.offset + _blockOffset + ((blockInfo.hdr.s0 >> 0xb) & 1)
-	  * 3;
+	  + blockInfo.hdr.s11 * 3;
 	quint32 low = 0;
-	quint32 high = blockInfo.h12 - 1;
+	quint32 high = blockInfo.hdr.s12 - 1;
 	quint32 pos;
 	quint16 val;
 
@@ -142,7 +545,7 @@ bool NODFile::linkType(Handle &hdl, const BlockInfo &blockInfo, quint8 linkId,
 		}
 	}
 
-	type *= 256;
+	type <<= 8;
 
 	return true;
 }

src/map/IMG/nodfile.h

@@ -7,23 +7,53 @@
 class NODFile : public SubFile
 {
 public:
-	struct BlockInfo {
+	struct BlockInfo
+	{
 		quint32 offset;
-		quint16 h0;
+		struct
-		quint32 h2;
+		{
-		quint32 h6;
+			quint32 s2; // node lon base
-		quint32 ha;
+			quint32 s6; // node lat base
-		quint16 he;
+			quint32 sa;
-		quint8 h10; // links count
+			quint16 s0; // flags
-		quint8 h11;
+			quint16 se; // link info bit size
-		quint8 h12;
+			quint8 s10; // links count
+			quint8 s11; // nodes count
+			quint8 s12; // link types count
+		} hdr;
 	};
 
-	struct LinkInfo {
+	struct LinkInfo
+	{
 		quint32 linkOffset;
+		quint32 nodeOffset;
 		quint32 flags;
 	};
 
+	struct NodeInfo
+	{
+		QPoint pos;
+		quint8 flags;
+		quint8 bytes;
+	};
+
+	struct AdjacencyInfo
+	{
+		AdjacencyInfo(const SubFile *file, const BlockInfo &blockInfo,
+		  quint32 linkId, const LinkInfo &linkInfo) : extHdl(file),
+		  blockInfo(blockInfo), nodeOffset(linkInfo.nodeOffset),
+		  linkOffset(linkInfo.linkOffset), linkId(linkId)
+		{}
+
+		Handle extHdl;
+		struct BlockInfo blockInfo;
+		struct NodeInfo nodeInfo;
+		quint32 nodeOffset;
+		quint32 linkOffset;
+		quint32 linkId;
+		quint8 flags;
+	};
+
 	NODFile(IMG *img) : SubFile(img), _indexOffset(0), _indexSize(0),
 	  _indexFlags(0), _blockOffset(0), _blockSize(0), _indexRecordSize(0),
 	  _blockRecordSize(0), _blockShift(0), _nodeShift(0) {}
@@ -36,19 +66,33 @@ public:
 	  _nodeShift(0) {}
 
 	quint32 indexIdSize(Handle &hdl);
-	bool blockInfo(Handle &hdl, quint32 blockIndexId,
+	bool blockInfo(Handle &hdl, quint32 blockId, BlockInfo &blockInfo) const;
-	  BlockInfo &blockInfo) const;
 	bool linkInfo(Handle &hdl, const BlockInfo &blockInfo, quint32 linkId,
 	  LinkInfo &linkInfo) const;
 	bool linkType(Handle &hdl, const BlockInfo &blockInfo, quint8 linkId,
 	  quint32 &type) const;
+	int nextNode(Handle &hdl, AdjacencyInfo &adjInfo);
 
 private:
 	bool init(Handle &hdl);
+	bool nodeInfo(Handle &hdl, const BlockInfo &blockInfo, quint32 nodeOffset,
+	  NodeInfo &nodeInfo) const;
+	bool nodeOffset(Handle &hdl, const BlockInfo &blockInfo, quint8 nodeId,
+	  quint32 &nodeOffset) const;
+	bool absAdjInfo(Handle &hdl, AdjacencyInfo &adj) const;
+	bool relAdjInfo(Handle &hdl, AdjacencyInfo &adj) const;
+	bool adjacencyInfo(Handle &hdl, AdjacencyInfo &adj) const
+	{
+		return (adj.nodeInfo.flags & 0x20) ? absAdjInfo(hdl, adj)
+		  : relAdjInfo(hdl, adj);
+	}
+	bool nodeBlock(Handle &hdl, quint32 nodeOffset, BlockInfo &blockInfo) const;
+	bool readBlock(Handle &hdl, quint32 blockOffset, BlockInfo &blockInfo) const;
 
 	quint32 _indexOffset, _indexSize, _indexFlags, _blockOffset, _blockSize;
 	quint16 _indexRecordSize, _blockRecordSize;
 	quint8 _blockShift, _nodeShift;
+	quint32 _flags;
 };
 
 #endif // NETFILE_H

src/map/IMG/rgnfile.cpp

@@ -424,8 +424,9 @@ bool RGNFile::extPointObjects(Handle &hdl, const SubDiv *subdiv, LBLFile *lbl,
 	return true;
 }
 
-bool RGNFile::links(Handle &hdl, const SubDiv *subdiv, NETFile *net,
+bool RGNFile::links(Handle &hdl, const SubDiv *subdiv, quint32 shift,
-  Handle &netHdl, NODFile *nod, Handle &nodHdl, QList<IMG::Poly> *lines) const
+  NETFile *net, Handle &netHdl, NODFile *nod, Handle &nodHdl, LBLFile *lbl,
+  Handle &lblHdl, QList<IMG::Poly> *lines) const
 {
 	quint32 size, blockIndexIdSize, blockIndexId;
 	quint8 flags;
@@ -494,8 +495,8 @@ bool RGNFile::links(Handle &hdl, const SubDiv *subdiv, NETFile *net,
 				lineId = 0;
 			}
 
-			net->link(subdiv, netHdl, nod, nodHdl, blockInfo, linkId, lineId,
+			net->link(subdiv, shift, netHdl, nod, nodHdl, lbl, lblHdl,
-			  _huffmanTable, lines);
+			  blockInfo, linkId, lineId, _huffmanTable, lines);
 		}
 
 		Q_ASSERT(entryStart + size == pos(hdl));

src/map/IMG/rgnfile.h

@@ -46,8 +46,9 @@ public:
 	  QList<IMG::Poly> *polys) const;
 	bool extPointObjects(Handle &hdl, const SubDiv *subdiv, LBLFile *lbl,
 	  Handle &lblHdl, QList<IMG::Point> *points) const;
-	bool links(Handle &hdl, const SubDiv *subdiv, NETFile *net, Handle &netHdl,
+	bool links(Handle &hdl, const SubDiv *subdiv, quint32 shift, NETFile *net,
-	  NODFile *nod, Handle &nodHdl, QList<IMG::Poly> *lines) const;
+	  Handle &netHdl, NODFile *nod, Handle &nodHdl, LBLFile *lbl, Handle &lblHdl,
+	  QList<IMG::Poly> *lines) const;
 
 	bool subdivInit(Handle &hdl, SubDiv *subdiv) const;
 

src/map/IMG/vectortile.cpp

@@ -149,7 +149,8 @@ void VectorTile::polys(const RectC &rect, int bits, bool baseMap,
 			  lblHdl, &p);
 			_rgn->extPolyObjects(rgnHdl, subdiv, shift, RGNFile::Line, _lbl,
 			  lblHdl, &l);
-			_rgn->links(rgnHdl, subdiv, _net, netHdl, _nod, nodHdl, &l);
+			_rgn->links(rgnHdl, subdiv, shift, _net, netHdl, _nod, nodHdl, _lbl,
+			  lblHdl, &l);
 
 			copyPolys(rect, &p, polygons);
 			copyPolys(rect, &l, lines);