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-rw-r--r--src/libsystemd/libsystemd-internal/sd-bus/bus-bloom.h43
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diff --git a/src/libsystemd/libsystemd-internal/sd-bus/bus-bloom.h b/src/libsystemd/libsystemd-internal/sd-bus/bus-bloom.h
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+++ b/src/libsystemd/libsystemd-internal/sd-bus/bus-bloom.h
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+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Lennart Poettering
+
+ systemd 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.
+
+ systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+/*
+ * Our default bloom filter has the following parameters:
+ *
+ * m=512 (bits in the filter)
+ * k=8 (hash functions)
+ *
+ * We use SipHash24 as hash function with a number of (originally
+ * randomized) but fixed hash keys.
+ *
+ */
+
+#define DEFAULT_BLOOM_SIZE (512/8) /* m: filter size */
+#define DEFAULT_BLOOM_N_HASH 8 /* k: number of hash functions */
+
+void bloom_add_pair(uint64_t filter[], size_t size, unsigned n_hash, const char *a, const char *b);
+void bloom_add_prefixes(uint64_t filter[], size_t size, unsigned n_hash, const char *a, const char *b, char sep);
+
+bool bloom_validate_parameters(size_t size, unsigned n_hash);