mirror of
https://github.com/VectorCamp/vectorscan.git
synced 2025-07-10 04:24:43 +03:00
73 lines
2.7 KiB
C++
73 lines
2.7 KiB
C++
/*
|
|
* Copyright (c) 2015-2017, Intel Corporation
|
|
*
|
|
* 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 Intel Corporation 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.
|
|
*/
|
|
|
|
/** \file
|
|
* \brief NFA graph state squashing analysis.
|
|
*/
|
|
#ifndef NG_SQUASH_H
|
|
#define NG_SQUASH_H
|
|
|
|
#include "ng_holder.h"
|
|
#include "som/som.h"
|
|
#include "ue2common.h"
|
|
|
|
#include <unordered_map>
|
|
#include <boost/dynamic_bitset.hpp>
|
|
|
|
namespace ue2 {
|
|
|
|
class NGHolder;
|
|
class ReportManager;
|
|
|
|
/**
|
|
* Dynamically-sized bitset, as an NFA can have an arbitrary number of states.
|
|
*/
|
|
using NFAStateSet = boost::dynamic_bitset<>;
|
|
|
|
/**
|
|
* Populates the squash mask for each vertex (i.e. the set of states to be left
|
|
* on during squashing).
|
|
*
|
|
* The NFAStateSet in the output map is indexed by vertex_index.
|
|
*/
|
|
std::unordered_map<NFAVertex, NFAStateSet>
|
|
findSquashers(const NGHolder &g, som_type som = SOM_NONE);
|
|
|
|
/** Filters out squash states intended only for use in DFA construction. */
|
|
void filterSquashers(const NGHolder &g,
|
|
std::unordered_map<NFAVertex, NFAStateSet> &squash);
|
|
|
|
/** Populates squash masks for states that can be switched off by highlander
|
|
* (single match) reporters. */
|
|
std::unordered_map<NFAVertex, NFAStateSet>
|
|
findHighlanderSquashers(const NGHolder &g, const ReportManager &rm);
|
|
|
|
} // namespace ue2
|
|
|
|
#endif // NG_SQUASH_H
|