mirror of
https://github.com/VectorCamp/vectorscan.git
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9cf66b6ac9
This commit replaces the ue2::unordered_{set,map} types with their STL
versions, with some new hashing utilities in util/hash.h. The new types
ue2_unordered_set<T> and ue2_unordered_map<Key, T> default to using the
ue2_hasher.
The header util/ue2_containers.h has been removed, and the flat_set/map
containers moved to util/flat_containers.h.
85 lines
3.0 KiB
C++
85 lines
3.0 KiB
C++
/*
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* Copyright (c) 2015-2017, Intel Corporation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/** \file
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* \brief Utility functions related to SOM ("Start of Match").
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*/
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#ifndef NG_SOM_UTIL_H
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#define NG_SOM_UTIL_H
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#include "ng_util.h"
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#include "util/depth.h"
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#include <map>
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#include <unordered_map>
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#include <vector>
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namespace ue2 {
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class NGHolder;
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/**
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* Returns min/max distance from start of match, index by vertex_id.
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*/
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std::vector<DepthMinMax> getDistancesFromSOM(const NGHolder &g);
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/**
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* Returns true if the first match by end-offset must always be the first match
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* by start-offset.
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*/
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bool firstMatchIsFirst(const NGHolder &p);
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struct smgb_cache : public mbsb_cache {
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explicit smgb_cache(const NGHolder &gg) : mbsb_cache(gg) {}
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std::map<NFAVertex, bool> smgb;
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};
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bool somMayGoBackwards(NFAVertex u, const NGHolder &g,
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const std::unordered_map<NFAVertex, u32> ®ion_map,
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smgb_cache &cache);
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/**
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* Returns true if matching 'sent' causes all tail states in the main graph \a
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* g to go dead. A tail state is any state with a region greater than
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* \a last_head_region.
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*
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* - The graph \a sent must be a "kinda-DAG", where the only back-edges present
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* are self-loops.
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* - If the result is false, \a bad_region will be updated with the smallest
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* region ID associated with a tail state that is still on.
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*/
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bool sentClearsTail(const NGHolder &g,
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const std::unordered_map<NFAVertex, u32> ®ion_map,
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const NGHolder &sent, u32 last_head_region,
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u32 *bad_region);
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} // namespace ue2
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#endif // NG_SOM_UTIL_H
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