#ifndef OSG_FIELDREADER
#define OSG_FIELDREADER 1

#include <osg/Export>
#include <string.h>
#include <stdlib.h>

#ifdef OSG_USE_IO_DOT_H
#include <iostream.h>
#else
#include <iostream>
using namespace std;
#endif

namespace osg {

class Field;

class SG_EXPORT FieldReader
{
    public:

        FieldReader();
        FieldReader(const FieldReader& ic);
        virtual ~FieldReader();

        virtual FieldReader& operator = (const FieldReader& ic);

        void attach(istream* input);
        void detach();

        virtual bool eof() const;

        bool readField(Field& fieldPtr);
        void ignoreField();
        
        /** no of unmatched `{' encounterd so far in file*/
        int getNoNestedBrackets() const;

    private:

        bool _readField(Field* fieldPtr);

        void _init();
        void _free();
        void _copy(const FieldReader& ic);

        istream* _fin;
        bool _eof;

        bool findStartOfNextField();

        int _noNestedBrackets;

        bool _delimatorEatLookUp[256];
        bool _delimatorKeepLookUp[256];

};

};

#endif                                            // __SG_FIELD_READER_H