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3 Copyright (C) 2012 Christian Grothoff (and other contributing authors)
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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 * The IBFs of this strata estimator.
51 struct InvertibleBloomFilter **strata;
54 * Size of the IBF array in @e strata
56 unsigned int strata_count;
59 * Size of each IBF stratum (in bytes)
61 unsigned int ibf_size;
66 * Write the given strata estimator to the buffer.
68 * @param se strata estimator to serialize
69 * @param buf buffer to write to, must be of appropriate size
72 strata_estimator_write (const struct StrataEstimator *se,
77 * Read strata from the buffer into the given strata
78 * estimator. The strata estimator must already be allocated.
80 * @param buf buffer to read from
81 * @param se strata estimator to write to
84 strata_estimator_read (const void *buf,
85 struct StrataEstimator *se);
89 * Create a new strata estimator with the given parameters.
91 * @param strata_count number of stratas, that is, number of ibfs in the estimator
92 * @param ibf_size size of each ibf stratum
93 * @param ibf_hashnum hashnum parameter of each ibf
94 * @return a freshly allocated, empty strata estimator
96 struct StrataEstimator *
97 strata_estimator_create (unsigned int strata_count,
103 * Get an estimation of the symmetric difference of the elements
104 * contained in both strata estimators.
106 * @param se1 first strata estimator
107 * @param se2 second strata estimator
108 * @return abs(|se1| - |se2|)
111 strata_estimator_difference (const struct StrataEstimator *se1,
112 const struct StrataEstimator *se2);
116 * Add a key to the strata estimator.
118 * @param se strata estimator to add the key to
119 * @param key key to add
122 strata_estimator_insert (struct StrataEstimator *se,
127 * Remove a key from the strata estimator.
129 * @param se strata estimator to remove the key from
130 * @param key key to remove
133 strata_estimator_remove (struct StrataEstimator *se,
138 * Destroy a strata estimator, free all of its resources.
140 * @param se strata estimator to destroy.
143 strata_estimator_destroy (struct StrataEstimator *se);
147 * Make a copy of a strata estimator.
149 * @param se the strata estimator to copy
152 struct StrataEstimator *
153 strata_estimator_dup (struct StrataEstimator *se);
156 #if 0 /* keep Emacsens' auto-indent happy */