--- /dev/null
+/* static_bitsequence_rrr02_light.h
+ * Copyright (C) 2008, Francisco Claude, all rights reserved.
+ *
+ * RRR02 Bitsequence - light version
+ *
+ * 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 _STATIC_BITSEQUENCE_RRR02_LIGHT_H
+#define _STATIC_BITSEQUENCE_RRR02_LIGHT_H
+
+#define BLOCK_SIZE_LIGHT 15
+#define DEFAULT_SAMPLING_LIGHT 32
+
+#include <static_bitsequence.h>
+#include <table_offset.h>
+#include <cassert>
+#include <iostream>
+
+//using namespace std;
+
+/** Implementation of Raman, Raman and Rao's [1] proposal for rank/select capable
+ * data structures, it achieves space nH_0, O(sample_rate) time for rank and O(log len)
+ * for select. The practial implementation is based on [2]
+ *
+ * [1] R. Raman, V. Raman and S. Rao. Succinct indexable dictionaries with applications
+ * to encoding $k$-ary trees and multisets. SODA02.
+ * [2] F. Claude and G. Navarro. Practical Rank/Select over Arbitrary Sequences. SPIRE08.
+ *
+ * @author Francisco Claude
+ */
+class static_bitsequence_rrr02_light: public static_bitsequence {
+public:
+ static_bitsequence_rrr02_light(uint * bitseq, uint len, uint sample_rate=DEFAULT_SAMPLING_LIGHT);
+ virtual ~static_bitsequence_rrr02_light();
+
+ /** Returns the number of zeros until position i */
+ virtual uint rank0(uint i);
+
+ /** Returns the number of ones until position i */
+ virtual uint rank1(uint i);
+
+ /** Returns the position of the i-th zero
+ * @return (uint)-1 if i=0, len if i>num_zeros or the position */
+ virtual uint select0(uint i);
+
+ /** Returns the position of the i-th one
+ * @return (uint)-1 if i=0, len if i>num_ones or the position */
+ virtual uint select1(uint i);
+
+ /** Returns the i-th bit */
+ virtual bool access(uint i);
+
+ /** Returns the size of the structure in bytes */
+ virtual uint size();
+
+ /** Stores the bitmap given a file pointer, return 0 in case of success */
+ virtual int save(FILE * fp);
+
+ /** Reads the bitmap from a file pointer, returns NULL in case of error */
+ static static_bitsequence_rrr02_light * load(FILE * fp);
+
+ /** Creates a new sampling for the queries */
+ void create_sampling(uint sampling_rate);
+
+ /** Frees the space required by the table E, which is static and global
+ * to all instances.
+ */
+ static void delete_E() {
+ delete E;
+ }
+
+protected:
+ static_bitsequence_rrr02_light();
+ /** Classes and offsets */
+ uint *C, *O;
+ uint O_bits_len;
+ /** C and O samplings */
+ uint *C_sampling, *O_pos;
+ /** Sample rate */
+ uint sample_rate;
+
+ static table_offset * E;
+};
+
+#endif /* _STATIC_BITSEQUENCE_RRR02_H */