homework-jianmu/source/libs/index/src/indexFstNode.c

121 lines
3.4 KiB
C

/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "indexFstNode.h"
FstBuilderNode* fstBuilderNodeDefault() {
FstBuilderNode* bn = taosMemoryMalloc(sizeof(FstBuilderNode));
bn->isFinal = false;
bn->finalOutput = 0;
bn->trans = taosArrayInit(16, sizeof(FstTransition));
return bn;
}
void fstBuilderNodeDestroy(FstBuilderNode* node) {
if (node == NULL) {
return;
}
taosArrayDestroy(node->trans);
taosMemoryFree(node);
}
bool fstBuilderNodeEqual(FstBuilderNode* n1, FstBuilderNode* n2) {
if (n1 == n2) {
return true;
}
if (n1 == NULL || n2 == NULL) {
return false;
}
if (n1->isFinal != n2->isFinal || n1->finalOutput != n2->finalOutput) {
return false;
}
size_t s1 = n1->trans ? taosArrayGetSize(n1->trans) : 0;
size_t s2 = n2->trans ? taosArrayGetSize(n2->trans) : 0;
if (s1 != s2) {
return false;
}
for (size_t i = 0; i < s1; i++) {
FstTransition* t1 = taosArrayGet(n1->trans, i);
FstTransition* t2 = taosArrayGet(n2->trans, i);
if (t1->inp != t2->inp || t1->out != t2->out || t1->addr != t2->addr) {
return false;
}
}
return true;
}
FstBuilderNode* fstBuilderNodeClone(FstBuilderNode* src) {
FstBuilderNode* node = taosMemoryMalloc(sizeof(FstBuilderNode));
if (node == NULL) {
return NULL;
}
//
size_t sz = taosArrayGetSize(src->trans);
SArray* trans = taosArrayInit(sz, sizeof(FstTransition));
for (size_t i = 0; i < sz; i++) {
FstTransition* tran = taosArrayGet(src->trans, i);
taosArrayPush(trans, tran);
}
node->trans = trans;
node->isFinal = src->isFinal;
node->finalOutput = src->finalOutput;
return node;
}
// not destroy src, User's bussiness
void fstBuilderNodeCloneFrom(FstBuilderNode* dst, FstBuilderNode* src) {
if (dst == NULL || src == NULL) {
return;
}
dst->isFinal = src->isFinal;
dst->finalOutput = src->finalOutput;
// release free avoid mem leak
taosArrayDestroy(dst->trans);
size_t sz = taosArrayGetSize(src->trans);
dst->trans = taosArrayInit(sz, sizeof(FstTransition));
for (size_t i = 0; i < sz; i++) {
FstTransition* trn = taosArrayGet(src->trans, i);
taosArrayPush(dst->trans, trn);
}
}
// bool fstBuilderNodeCompileTo(FstBuilderNode *b, IdxFile *wrt, CompiledAddr lastAddr, CompiledAddr
// startAddr) {
// size_t sz = taosArrayGetSize(b->trans);
// assert(sz < 256);
// if (FST_BUILDER_NODE_IS_FINAL(b)
// && FST_BUILDER_NODE_TRANS_ISEMPTY(b)
// && FST_BUILDER_NODE_FINALOUTPUT_ISZERO(b)) {
// return true;
//} else if (sz != 1 || b->isFinal) {
// // AnyTrans->Compile(w, addr, node);
//} else {
// FstTransition *tran = taosArrayGet(b->trans, 0);
// if (tran->addr == lastAddr && tran->out == 0) {
// //OneTransNext::compile(w, lastAddr, tran->inp);
// return true;
// } else {
// //OneTrans::Compile(w, lastAddr, *tran);
// return true;
// }
//}
// return true;
//}