mirror of
https://github.com/VectorCamp/vectorscan.git
synced 2025-07-13 22:14:45 +03:00
122 lines
4.6 KiB
C++
122 lines
4.6 KiB
C++
/*
|
|
* Copyright (c) 2015-2016, 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.
|
|
*/
|
|
|
|
#ifndef MCCLELLANCOMPILE_H
|
|
#define MCCLELLANCOMPILE_H
|
|
|
|
#include "rdfa.h"
|
|
#include "ue2common.h"
|
|
#include "util/accel_scheme.h"
|
|
#include "util/alloc.h"
|
|
#include "util/charreach.h"
|
|
#include "util/ue2_containers.h"
|
|
|
|
#include <memory>
|
|
#include <vector>
|
|
#include <set>
|
|
|
|
struct NFA;
|
|
|
|
namespace ue2 {
|
|
|
|
class ReportManager;
|
|
struct CompileContext;
|
|
|
|
struct raw_report_info {
|
|
raw_report_info();
|
|
virtual ~raw_report_info();
|
|
virtual u32 getReportListSize() const = 0; /* in bytes */
|
|
virtual size_t size() const = 0; /* number of lists */
|
|
virtual void fillReportLists(NFA *n, size_t base_offset,
|
|
std::vector<u32> &ro /* out */) const = 0;
|
|
};
|
|
|
|
class dfa_build_strat {
|
|
public:
|
|
explicit dfa_build_strat(const ReportManager &rm_in) : rm(rm_in) {}
|
|
virtual ~dfa_build_strat();
|
|
virtual raw_dfa &get_raw() const = 0;
|
|
virtual std::unique_ptr<raw_report_info> gatherReports(
|
|
std::vector<u32> &reports /* out */,
|
|
std::vector<u32> &reports_eod /* out */,
|
|
u8 *isSingleReport /* out */,
|
|
ReportID *arbReport /* out */) const = 0;
|
|
virtual AccelScheme find_escape_strings(dstate_id_t this_idx) const = 0;
|
|
virtual size_t accelSize(void) const = 0;
|
|
virtual void buildAccel(dstate_id_t this_idx, const AccelScheme &info,
|
|
void *accel_out) = 0;
|
|
protected:
|
|
const ReportManager &rm;
|
|
};
|
|
|
|
class mcclellan_build_strat : public dfa_build_strat {
|
|
public:
|
|
mcclellan_build_strat(raw_dfa &rdfa_in, const ReportManager &rm_in)
|
|
: dfa_build_strat(rm_in), rdfa(rdfa_in) {}
|
|
raw_dfa &get_raw() const override { return rdfa; }
|
|
std::unique_ptr<raw_report_info> gatherReports(
|
|
std::vector<u32> &reports /* out */,
|
|
std::vector<u32> &reports_eod /* out */,
|
|
u8 *isSingleReport /* out */,
|
|
ReportID *arbReport /* out */) const override;
|
|
AccelScheme find_escape_strings(dstate_id_t this_idx) const override;
|
|
size_t accelSize(void) const override;
|
|
void buildAccel(dstate_id_t this_idx,const AccelScheme &info,
|
|
void *accel_out) override;
|
|
virtual u32 max_allowed_offset_accel() const;
|
|
|
|
private:
|
|
raw_dfa &rdfa;
|
|
};
|
|
|
|
/* accel_states: (optional) on success, is filled with the set of accelerable
|
|
* states */
|
|
ue2::aligned_unique_ptr<NFA>
|
|
mcclellanCompile(raw_dfa &raw, const CompileContext &cc,
|
|
const ReportManager &rm,
|
|
std::set<dstate_id_t> *accel_states = nullptr);
|
|
|
|
/* used internally by mcclellan/haig/gough compile process */
|
|
ue2::aligned_unique_ptr<NFA>
|
|
mcclellanCompile_i(raw_dfa &raw, dfa_build_strat &strat,
|
|
const CompileContext &cc,
|
|
std::set<dstate_id_t> *accel_states = nullptr);
|
|
|
|
/**
|
|
* \brief Returns the width of the character reach at start.
|
|
*/
|
|
u32 mcclellanStartReachSize(const raw_dfa *raw);
|
|
|
|
std::set<ReportID> all_reports(const raw_dfa &rdfa);
|
|
|
|
bool has_accel_dfa(const NFA *nfa);
|
|
|
|
} // namespace ue2
|
|
|
|
#endif
|