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+/*
+ This file is part of GNUnet
+ (C) 2012 Christian Grothoff (and other contributing authors)
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 2, or (at your
+ option) any later version.
+
+ GNUnet 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file consensus/strata_estimator.h
+ * @brief estimator of set difference
+ * @author Florian Dold
+ */
+
+#ifndef GNUNET_CONSENSUS_STRATA_ESTIMATOR_H
+#define GNUNET_CONSENSUS_STRATA_ESTIMATOR_H
+
+#include "platform.h"
+#include "gnunet_common.h"
+#include "gnunet_util_lib.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#if 0 /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+
+struct StrataEstimator
+{
+ struct InvertibleBloomFilter **strata;
+ unsigned int strata_count;
+ unsigned int ibf_size;
+};
+
+
+void
+strata_estimator_write (const struct StrataEstimator *se, void *buf);
+
+
+void
+strata_estimator_read (const void *buf, struct StrataEstimator *se);
+
+
+struct StrataEstimator *
+strata_estimator_create (unsigned int strata_count, uint32_t ibf_size, uint8_t ibf_hashnum);
+
+
+unsigned int
+strata_estimator_difference (const struct StrataEstimator *se1,
+ const struct StrataEstimator *se2);
+
+
+void
+strata_estimator_insert (struct StrataEstimator *se, struct GNUNET_HashCode *key);
+
+
+void
+strata_estimator_destroy (struct StrataEstimator *se);
+
+
+#if 0 /* keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+