2 This file is part of GNUnet
3 (C) 2012 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file set/gnunet-service-set_union_strata_estimator.h
23 * @brief estimator of set difference
24 * @author Florian Dold
27 #ifndef GNUNET_CONSENSUS_STRATA_ESTIMATOR_H
28 #define GNUNET_CONSENSUS_STRATA_ESTIMATOR_H
31 #include "gnunet_common.h"
32 #include "gnunet_util_lib.h"
37 #if 0 /* keep Emacsens' auto-indent happy */
44 * A handle to a strata estimator.
46 struct StrataEstimator
49 struct InvertibleBloomFilter **strata;
52 * Size of the IBF array in @e strata
54 unsigned int strata_count;
56 unsigned int ibf_size;
61 * Write the given strata estimator to the buffer.
63 * @param se strata estimator to serialize
64 * @param buf buffer to write to, must be of appropriate size
67 strata_estimator_write (const struct StrataEstimator *se,
72 * Read strata from the buffer into the given strata
73 * estimator. The strata estimator must already be allocated.
75 * @param buf buffer to read from
76 * @param se strata estimator to write to
79 strata_estimator_read (const void *buf,
80 struct StrataEstimator *se);
84 * Create a new strata estimator with the given parameters.
86 * @param strata_count number of stratas, that is, number of ibfs in the estimator
87 * @param ibf_size size of each ibf stratum
88 * @param ibf_hashnum hashnum parameter of each ibf
89 * @return a freshly allocated, empty strata estimator
91 struct StrataEstimator *
92 strata_estimator_create (unsigned int strata_count,
98 * Get an estimation of the symmetric difference of the elements
99 * contained in both strata estimators.
101 * @param se1 first strata estimator
102 * @param se2 second strata estimator
103 * @return abs(|se1| - |se2|)
106 strata_estimator_difference (const struct StrataEstimator *se1,
107 const struct StrataEstimator *se2);
111 * Add a key to the strata estimator.
113 * @param se strata estimator to add the key to
114 * @param key key to add
117 strata_estimator_insert (struct StrataEstimator *se,
122 * Remove a key from the strata estimator.
124 * @param se strata estimator to remove the key from
125 * @param key key to remove
128 strata_estimator_remove (struct StrataEstimator *se,
133 * Destroy a strata estimator, free all of its resources.
135 * @param se strata estimator to destroy.
138 strata_estimator_destroy (struct StrataEstimator *se);
142 * Make a copy of a strata estimator.
144 * @param se the strata estimator to copy
147 struct StrataEstimator *
148 strata_estimator_dup (struct StrataEstimator *se);
151 #if 0 /* keep Emacsens' auto-indent happy */