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/*
* Copyright (c) 2017, 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 exclusive analysis for infix and suffix engines.
* Two engines are considered as exclusive if they can never be alive
* at the same time. This analysis takes advantage of the property of
* triggering literal + engine graph. If the triggering literals of
* two engines can make all the states dead in each other's graph,
* then they are exclusive.
*/
#ifndef ROSE_BUILD_EXCLUSIVE_H
#define ROSE_BUILD_EXCLUSIVE_H
#include "ue2common.h"
#include "rose_build_impl.h"
#include "util/alloc.h"
#include "util/charreach.h"
#include <map>
#include <set>
#include <vector>
namespace ue2 {
/** \brief role info structure for exclusive analysis */
template<typename role_id>
struct RoleInfo {
RoleInfo(role_id role_in, u32 id_in) : role(role_in), id(id_in) {}
bool operator==(const RoleInfo &b) const {
return id == b.id;
}
bool operator!=(const RoleInfo &b) const { return !(*this == b); }
bool operator<(const RoleInfo &b) const {
const RoleInfo &a = *this;
if (a.score != b.score) {
return a.score > b.score;
}
ORDER_CHECK(id);
return false;
}
std::vector<std::vector<CharReach>> literals; // prefix literals
CharReach prefix_cr; // reach of prefix literals
CharReach last_cr; // reach of the last character of literals
CharReach cr; // reach of engine graph
const role_id role; // infix or suffix info
const u32 id; // infix or suffix id
u32 score = ~0U; // score for exclusive analysis
};
/**
* \brief add triggering literals to infix info.
*/
bool setTriggerLiteralsInfix(RoleInfo<left_id> &roleInfo,
const std::map<u32, std::vector<std::vector<CharReach>>> &triggers);
/**
* \brief add triggering literals to suffix info.
*/
bool setTriggerLiteralsSuffix(RoleInfo<suffix_id> &roleInfo,
const std::map<u32, std::vector<std::vector<CharReach>>> &triggers);
/**
* Exclusive analysis for infix engines.
*
* @param build rose build info mainly used to set exclusive chunk size here
* @param vertex_map mapping between engine id and rose vertices
* related to this engine
* @param roleInfoSet structure contains role properties including infix info,
* triggering literals and literal reachabilities.
* Used for exclusive analysis.
* @param exclusive_roles output mapping between engine id and its exclusive
* group id
*/
void exclusiveAnalysisInfix(const RoseBuildImpl &build,
const std::map<u32, std::vector<RoseVertex>> &vertex_map,
std::set<RoleInfo<left_id>> &roleInfoSet,
std::vector<std::vector<u32>> &exclusive_roles);
/**
* Exclusive analysis for suffix engines.
*
* @param build rose build info mainly used to set exclusive chunk size here
* @param vertex_map mapping between engine id and rose vertices
* related to this engine
* @param roleInfoSet structure contains role properties including suffix info,
* triggering literals and literal reachabilities.
* Used for exclusive analysis.
* @param exclusive_roles output mapping between engine id and its exclusive
* group id
*/
void exclusiveAnalysisSuffix(const RoseBuildImpl &build,
const std::map<u32, std::vector<RoseVertex>> &vertex_map,
std::set<RoleInfo<suffix_id>> &roleInfoSet,
std::vector<std::vector<u32>> &exclusive_roles);
} // namespace ue2
#endif //ROSE_BUILD_EXCLUSIVE_H
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