mirror of
https://github.com/VectorCamp/vectorscan.git
synced 2025-06-28 16:41:01 +03:00
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.
119 lines
3.7 KiB
C++
119 lines
3.7 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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/**
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* \file
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* \brief SOM Slot Manager.
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*/
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#ifndef SLOT_MANAGER_H
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#define SLOT_MANAGER_H
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#include "ue2common.h"
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#include "nfagraph/ng_holder.h"
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#include "util/bytecode_ptr.h"
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#include "util/noncopyable.h"
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#include <deque>
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#include <memory>
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#include <unordered_map>
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struct NFA;
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namespace ue2 {
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class CharReach;
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class NGHolder;
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struct Grey;
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struct SlotCache;
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/** \brief SOM slot manager. Used to hand out SOM slots and track their
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* relationships during SOM construction. Also stores reverse NFAs used for
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* SOM. */
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class SomSlotManager : noncopyable {
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public:
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explicit SomSlotManager(u8 precision);
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~SomSlotManager();
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/** \brief Sentinel value used to specify that a slot has no parent. */
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static constexpr u32 NO_PARENT = ~0;
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u32 getSomSlot(const NGHolder &prefix, const CharReach &escapes,
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bool is_reset, u32 parent_slot);
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/** prefix must be acting as a resetting sentinel and should be a dag (if
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* not how are we establish som?) */
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u32 getInitialResetSomSlot(const NGHolder &prefix, const NGHolder &g,
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const std::unordered_map<NFAVertex, u32> ®ion_map,
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u32 last_sent_region,
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bool *prefix_already_implemented);
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u32 getPrivateSomSlot(void);
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void rollbackSomTo(u32 num);
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u32 numSomSlots() const;
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const std::deque<bytecode_ptr<NFA>> &getRevNfas() const {
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return rev_nfas;
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}
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u32 addRevNfa(bytecode_ptr<NFA> nfa, u32 maxWidth);
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u32 somHistoryRequired() const { return historyRequired; }
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u32 somPrecision() const { return precision; }
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void somPrecision(u32 p) {
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precision = p;
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}
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private:
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u32 nextSomSlot;
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std::unique_ptr<SlotCache> cache;
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/** \brief Reverse NFAs used for SOM support. */
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std::deque<bytecode_ptr<NFA>> rev_nfas;
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/** \brief In streaming mode, the amount of history we've committed to
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* using for SOM rev NFAs. */
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u32 historyRequired;
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/** \brief Number of bytes of SOM precision requested by the user, zero if
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* not in SOM mode. */
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u32 precision;
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#ifdef DUMP_SUPPORT
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friend void dumpSomSlotManager(const SomSlotManager &ssm, const Grey &grey);
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#endif
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};
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} // namespace ue2
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#endif
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