lanes.h

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/*
        Author: Marco Costalba (C) 2005-2006

        Copyright: See COPYING file that comes with this distribution

*/
#ifndef LANES_H
#define LANES_H

#include <qstring.h>
#include <qstringlist.h>
#include <qvaluevector.h>

class Lanes {
public:
        Lanes() {} // init() will setup us later, when data is available
        bool isEmpty() { return typeVec.empty(); }
        void init(const QString& expectedSha);
        void clear();
        bool isFork(const QString& sha, bool& isDiscontinuity);
        void setBoundary(bool isBoundary);
        void setFork(const QString& sha);
        void setMerge(const QStringList& parents);
        void setInitial();
        void setApplied();
        void changeActiveLane(const QString& sha);
        void afterMerge();
        void afterFork();
        bool isBranch();
        void afterBranch();
        void afterApplied();
        void nextParent(const QString& sha);
        void getLanes(QValueVector<int> &ln) { ln = typeVec; } // O(1) vector is implicitly shared

private:
        int findNextSha(const QString& next, int pos);
        int findType(int type, int pos);
        int add(int type, const QString& next, int pos);

        int activeLane;
        QValueVector<int> typeVec;
        QValueVector<QString> nextShaVec;
        bool boundary;
        int NODE, NODE_L, NODE_R;
};

#endif

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