/* SequenceGMR.h
 * Copyright (C) 2008, Francisco Claude, all rights reserved.
 *
 * GMR
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifndef SEQUENCEGMR_H
#define SEQUENCEGMR_H

#include <libcdsBasics.h>
#include <Sequence.h>
#include <BitSequence.h>
#include <SequenceBuilder.h>
#include <BitSequenceBuilder.h>
#include <cassert>
#include <iostream>

using namespace cds_utils;
namespace cds_static
{
	//using namespace std;

	class SequenceGMR : public Sequence
	{
		public:
			/** Builds the GMR structure.
			 * @param sequence Sequence of unsigned ints
			 * @param n length of the sequence
			 * @param chunk_length length of the regular partitioning (called chunks in the paper)
			 * @param bmb builder for the bitmap B (as called in the paper)
			 * @param ssb builder for the representation used for each chunk.
			 */
			SequenceGMR(uint * sequence, size_t n, uint chunk_length, BitSequenceBuilder * bmb, SequenceBuilder * ssb);
			SequenceGMR(const Array & sequence, uint chunk_length, BitSequenceBuilder * bmb, SequenceBuilder * ssb);

			~SequenceGMR();
			virtual size_t rank(uint c, size_t j) const;
			virtual size_t select(uint c, size_t j) const;
			virtual uint access(size_t j) const;
			virtual size_t getSize() const;
			virtual void save(ostream & fp) const;
			/** Loads the SequenceGMR object from the stream.
			 */
			static SequenceGMR * load(istream & fp);

		protected:
			SequenceGMR();
			void build(uint * sequence, BitSequenceBuilder * bmb, SequenceBuilder * ssb);
			uint * get_ones(uint * sequence);

			uint sigma, chunk_length;
			Sequence ** chunk;
			BitSequence * B;
	};

};
#endif