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.
74 lines
2.6 KiB
C++
74 lines
2.6 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 Shufti acceleration: compile code.
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*/
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#ifndef SHUFTI_COMPILE_H
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#define SHUFTI_COMPILE_H
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#include "ue2common.h"
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#include "util/charreach.h"
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#include "util/flat_containers.h"
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#include <utility>
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namespace ue2 {
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/** \brief Single-byte variant.
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*
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* Returns -1 if unable to construct masks, otherwise returns number of bits
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* used in the mask.
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*
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* Note: always able to construct masks for 8 or fewer characters.
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*/
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int shuftiBuildMasks(const CharReach &chars, u8 *lo, u8 *hi);
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/** \brief Double-byte variant
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*
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* Returns false if we are unable to build the masks (too many buckets required)
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*/
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bool shuftiBuildDoubleMasks(const CharReach &onechar,
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const flat_set<std::pair<u8, u8>> &twochar,
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u8 *lo1, u8 *hi1, u8 *lo2, u8 *hi2);
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#ifdef DUMP_SUPPORT
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/**
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* \brief Dump code: returns a CharReach with the reach that would match this
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* shufti.
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*/
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CharReach shufti2cr(const u8 *lo, const u8 *hi);
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#endif // DUMP_SUPPORT
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} // namespace ue2
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#endif // SHUFTI_COMPILE_H
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