75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/*
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* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the GNU Affero General Public License, version 3
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* or later ("AGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __INDEX_FST_DFA_H__
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#define __INDEX_FST_DFA_H__
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#include "indexFstRegex.h"
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#include "indexFstSparse.h"
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#include "tarray.h"
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#include "thash.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct FstDfa FstDfa;
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typedef struct {
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SArray *insts;
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uint32_t next[256];
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bool isMatch;
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} DfaState;
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/*
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* dfa builder related func
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**/
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typedef struct FstDfaBuilder {
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FstDfa *dfa;
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SHashObj *cache;
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} FstDfaBuilder;
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FstDfaBuilder *dfaBuilderCreate(SArray *insts);
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void dfaBuilderDestroy(FstDfaBuilder *builder);
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FstDfa *dfaBuilderBuild(FstDfaBuilder *builder);
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bool dfaBuilderRunState(FstDfaBuilder *builder, FstSparseSet *cur, FstSparseSet *next, uint32_t state, uint8_t bytes,
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uint32_t *result);
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bool dfaBuilderCacheState(FstDfaBuilder *builder, FstSparseSet *set, uint32_t *result);
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/*
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* dfa related func
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**/
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typedef struct FstDfa {
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SArray *insts;
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SArray *states;
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} FstDfa;
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FstDfa *dfaCreate(SArray *insts, SArray *states);
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bool dfaIsMatch(FstDfa *dfa, uint32_t si);
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bool dfaAccept(FstDfa *dfa, uint32_t si, uint8_t byte, uint32_t *result);
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void dfaAdd(FstDfa *dfa, FstSparseSet *set, uint32_t ip);
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bool dfaRun(FstDfa *dfa, FstSparseSet *from, FstSparseSet *to, uint8_t byte);
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#ifdef __cplusplus
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}
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#endif
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#endif
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