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+/*
+ * Copyright (c) 2019 Inria
+ * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Daniel Carvalho
+ */
+
+#ifndef __BASE_FILTERS_BLOCK_BLOOM_FILTER_HH__
+#define __BASE_FILTERS_BLOCK_BLOOM_FILTER_HH__
+
+#include <vector>
+
+#include "base/filters/base.hh"
+
+struct BloomFilterBlockParams;
+
+namespace BloomFilter {
+
+/**
+ * Simple deletable (with false negatives) bloom filter that extracts
+ * bitfields of an address to use as indexes of the filter vector.
+ */
+class Block : public Base
+{
+ public:
+ Block(const BloomFilterBlockParams* p);
+ ~Block();
+
+ void set(Addr addr) override;
+ void unset(Addr addr) override;
+ int getCount(Addr addr) const override;
+
+ private:
+ /**
+ * XOR hash between bitfields of an address, provided by the mask vector.
+ *
+ * @param addr The address to be hashed.
+ * @return The value of the XOR of the masked bitfields of the address.
+ */
+ int hash(Addr addr) const;
+
+ /** Position of the LSB of each mask. */
+ std::vector<unsigned> masksLSBs;
+
+ /** Number of bits in each mask. */
+ std::vector<unsigned> masksSizes;
+};
+
+} // namespace BloomFilter
+
+#endif // __BASE_FILTERS_BLOCK_BLOOM_FILTER_HH__