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https://github.com/VectorCamp/vectorscan.git
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76 lines
2.6 KiB
C++
76 lines
2.6 KiB
C++
/*
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* Copyright (c) 2015, 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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#ifndef MULTIACCELCOMPILE_H_
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#define MULTIACCELCOMPILE_H_
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#include "ue2common.h"
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#include "nfagraph/ng_limex_accel.h"
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#include <vector>
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namespace ue2 {
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/* accel scheme state machine */
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enum accel_scheme_state {
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STATE_FIRST_RUN,
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STATE_SECOND_RUN,
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STATE_WAITING_FOR_GRAB,
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STATE_FIRST_TAIL,
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STATE_SECOND_TAIL,
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STATE_STOPPED,
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STATE_INVALID
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};
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struct accel_data {
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MultibyteAccelInfo::multiaccel_type type = MultibyteAccelInfo::MAT_NONE;
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accel_scheme_state state = STATE_INVALID;
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unsigned len1 = 0; /* length of first run */
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unsigned len2 = 0; /* length of second run, if present */
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unsigned tlen1 = 0; /* first tail length */
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unsigned tlen2 = 0; /* second tail length */
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};
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class MultiaccelCompileHelper {
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private:
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const CharReach &cr;
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u32 offset;
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std::vector<accel_data> accels;
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unsigned max_len;
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public:
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MultiaccelCompileHelper(const CharReach &cr, u32 off, unsigned max_len);
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bool canAdvance();
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MultibyteAccelInfo getBestScheme();
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void advance(const ue2::CharReach &cr);
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};
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}; // namespace
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#endif /* MULTIACCELCOMPILE_H_ */
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