#ifndef __FIXFHEAP_HPP
#define __FIXFHEAP_HPP

#include "fileheap.hpp"

struct FixedFileHeap_header;
class FixedFileHeap : public FileHeap {
public:
        FixedFileHeap(FileHeapStorage *s);
        FixedFileHeap(FileHeapStorage *s, int rsize, int bsize);
        ~FixedFileHeap();
        
        recid Alloc(int rsize);
        int Free(recid r);
        int Read(recid r, void *data, int datalen);
        int Write(recid r, const void *data, int datalen);
        void Flush();
        
        int FindFirst(recid r[], int maxrecids, int *recids);
        int FindNext(recid from, recid r[], int maxrecids, int *recids);

        int cardinality();
        unsigned long count_approx();
        unsigned long count_exact();
private:
        long blockno;
        void *block;
        int blockdirty;
        FixedFileHeap_header *header;
        int headerdirty;
        unsigned long rmask;
        
        void makenewblock();
        recid findfreerecord();
        void fetchblock(long bn);
        void syncblock();
        void addfreeblock(long bn);
        void removefreeblock(long bn);
};

#endif