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/*
* Copyright (c) 2015-2018, 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 "accel_dfa_build_strat.h"
#include "rdfa.h"
#include "ue2common.h"
#include "util/bytecode_ptr.h"
#include <memory>
#include <vector>
#include <set>
struct NFA;
namespace ue2 {
class ReportManager;
struct CompileContext;
class mcclellan_build_strat : public accel_dfa_build_strat {
public:
mcclellan_build_strat(raw_dfa &rdfa_in, const ReportManager &rm_in,
bool only_accel_init_in)
: accel_dfa_build_strat(rm_in, only_accel_init_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;
size_t accelSize(void) const override;
u32 max_allowed_offset_accel() const override;
u32 max_stop_char() const override;
u32 max_floating_stop_char() const override;
DfaType getType() const override { return McClellan; }
private:
raw_dfa &rdfa;
};
/**
* \brief Construct an implementation DFA.
*
* \param raw the raw dfa to construct from
* \param cc compile context
* \param rm report manger
* \param only_accel_init if true, only the init states will be examined for
* acceleration opportunities
* \param trust_daddy_states if true, trust the daddy state set in the raw dfa
* rather than conducting a search for a better daddy (for Sherman
* states)
* \param accel_states (optional) success, is filled with the set of
* accelerable states
*/
bytecode_ptr<NFA>
mcclellanCompile(raw_dfa &raw, const CompileContext &cc,
const ReportManager &rm, bool only_accel_init,
bool trust_daddy_states = false,
std::set<dstate_id_t> *accel_states = nullptr);
/* used internally by mcclellan/haig/gough compile process */
bytecode_ptr<NFA>
mcclellanCompile_i(raw_dfa &raw, accel_dfa_build_strat &strat,
const CompileContext &cc, bool trust_daddy_states = false,
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_mcclellan(const NFA *nfa);
} // namespace ue2
#endif // MCCLELLANCOMPILE_H
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