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/*
* Copyright (c) 2015, 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.
*/
/** \file
* \brief Bounded repeat compile-time code.
*/
#ifndef REPEATCOMPILE_H
#define REPEATCOMPILE_H
#include "repeat_internal.h"
#include <cstdint>
#include <utility>
#include <vector>
namespace ue2 {
class CharReach;
class depth;
/**
* \brief Structure representing the various state requirements for a given
* bounded repeat.
*/
struct RepeatStateInfo {
RepeatStateInfo(enum RepeatType type, const depth &repeatMin,
const depth &repeatMax, u32 minPeriod);
u32 stateSize;
u32 packedCtrlSize;
u32 horizon;
u32 patchCount;
u32 patchSize;
u32 encodingSize;
u32 patchesOffset;
std::vector<u32> packedFieldSizes;
std::vector<uint64_t> table; // not u64a, for boost/gcc-4.9
};
/**
* \brief Given the parameters of a repeat, choose a repeat implementation
* type.
*/
enum RepeatType chooseRepeatType(const depth &repeatMin, const depth &repeatMax,
u32 minPeriod, bool is_reset,
bool has_external_guard = false);
u32 calcPackedBytes(u64a val);
bool matches(std::vector<CharReach>::const_iterator a_it,
std::vector<CharReach>::const_iterator a_ite,
std::vector<CharReach>::const_iterator b_it,
std::vector<CharReach>::const_iterator b_ite);
std::vector<size_t>
minResetDistToEnd(const std::vector<std::vector<CharReach>> &triggers,
const CharReach &cr);
u32 minPeriod(const std::vector<std::vector<CharReach>> &triggers,
const CharReach &cr, bool *can_reset);
} // namespace ue2
#endif // REPEATCOMPILE_H
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