558   fuzzer_cursor *pCur;  in fuzzerOpen()  local
559   pCur = sqlite3_malloc( sizeof(*pCur) );  in fuzzerOpen()
560   if( pCur==0 ) return SQLITE_NOMEM;  in fuzzerOpen()
561   memset(pCur, 0, sizeof(*pCur));  in fuzzerOpen()
562   pCur->pVtab = p;  in fuzzerOpen()
563   *ppCursor = &pCur->base;  in fuzzerOpen()
583 static void fuzzerClearCursor(fuzzer_cursor *pCur, int clearHash){  in fuzzerClearCursor()  argument
585   fuzzerClearStemList(pCur->pStem);  in fuzzerClearCursor()
586   fuzzerClearStemList(pCur->pDone);  in fuzzerClearCursor()
587   for(i=0; i<FUZZER_NQUEUE; i++) fuzzerClearStemList(pCur->aQueue[i]);  in fuzzerClearCursor()
588   pCur->rLimit = (fuzzer_cost)0;  in fuzzerClearCursor()
589   if( clearHash && pCur->nStem ){  in fuzzerClearCursor()
590     pCur->mxQueue = 0;  in fuzzerClearCursor()
591     pCur->pStem = 0;  in fuzzerClearCursor()
592     pCur->pDone = 0;  in fuzzerClearCursor()
593     memset(pCur->aQueue, 0, sizeof(pCur->aQueue));  in fuzzerClearCursor()
594     memset(pCur->apHash, 0, sizeof(pCur->apHash));  in fuzzerClearCursor()
596   pCur->nStem = 0;  in fuzzerClearCursor()
603   fuzzer_cursor *pCur = (fuzzer_cursor *)cur;  in fuzzerClose()  local
604   fuzzerClearCursor(pCur, 0);  in fuzzerClose()
605   sqlite3_free(pCur->zBuf);  in fuzzerClose()
606   pCur->pVtab->nCursor--;  in fuzzerClose()
607   sqlite3_free(pCur);  in fuzzerClose()
694 static int fuzzerSeen(fuzzer_cursor *pCur, fuzzer_stem *pStem){  in fuzzerSeen()  argument
698   if( fuzzerRender(pStem, &pCur->zBuf, &pCur->nBuf)==SQLITE_NOMEM ){  in fuzzerSeen()
701   h = fuzzerHash(pCur->zBuf);  in fuzzerSeen()
702   pLookup = pCur->apHash[h];  in fuzzerSeen()
703   while( pLookup && strcmp(pLookup->zBasis, pCur->zBuf)!=0 ){  in fuzzerSeen()
733 static int fuzzerAdvance(fuzzer_cursor *pCur, fuzzer_stem *pStem){  in fuzzerAdvance()  argument
736     assert( pRule==&pCur->nullRule || pRule->iRuleset==pCur->iRuleset );  in fuzzerAdvance()
743         int rc = fuzzerSeen(pCur, pStem);  in fuzzerAdvance()
754     }while( fuzzerSkipRule(pRule, pStem, pCur->iRuleset) );  in fuzzerAdvance()
756     if( pRule && fuzzerCost(pStem)>pCur->rLimit ) pStem->pRule = 0;  in fuzzerAdvance()
794 static fuzzer_stem *fuzzerLowestCostStem(fuzzer_cursor *pCur){  in fuzzerLowestCostStem()  argument
799   if( pCur->pStem==0 ){  in fuzzerLowestCostStem()
802     for(i=0; i<=pCur->mxQueue; i++){  in fuzzerLowestCostStem()
803       pX = pCur->aQueue[i];  in fuzzerLowestCostStem()
811       pCur->aQueue[iBest] = pBest->pNext;  in fuzzerLowestCostStem()
813       pCur->pStem = pBest;  in fuzzerLowestCostStem()
816   return pCur->pStem;  in fuzzerLowestCostStem()
825 static fuzzer_stem *fuzzerInsert(fuzzer_cursor *pCur, fuzzer_stem *pNew){  in fuzzerInsert()  argument
832   if( (pX = pCur->pStem)!=0 && pX->rCostX>pNew->rCostX ){  in fuzzerInsert()
834     pCur->pStem = pNew;  in fuzzerInsert()
841   for(i=0; i<=pCur->mxQueue; i++){  in fuzzerInsert()
842     if( pCur->aQueue[i] ){  in fuzzerInsert()
843       pX = fuzzerMergeStems(pX, pCur->aQueue[i]);  in fuzzerInsert()
844       pCur->aQueue[i] = 0;  in fuzzerInsert()
846       pCur->aQueue[i] = pX;  in fuzzerInsert()
850   if( i>pCur->mxQueue ){  in fuzzerInsert()
852       pCur->mxQueue = i;  in fuzzerInsert()
853       pCur->aQueue[i] = pX;  in fuzzerInsert()
855       assert( pCur->mxQueue==FUZZER_NQUEUE-1 );  in fuzzerInsert()
856       pX = fuzzerMergeStems(pX, pCur->aQueue[FUZZER_NQUEUE-1]);  in fuzzerInsert()
857       pCur->aQueue[FUZZER_NQUEUE-1] = pX;  in fuzzerInsert()
861   return fuzzerLowestCostStem(pCur);  in fuzzerInsert()
869   fuzzer_cursor *pCur,  in fuzzerNewStem()  argument
883   pRule = pCur->pVtab->pRule;  in fuzzerNewStem()
884   while( fuzzerSkipRule(pRule, pNew, pCur->iRuleset) ){  in fuzzerNewStem()
891   pNew->pHash = pCur->apHash[h];  in fuzzerNewStem()
892   pCur->apHash[h] = pNew;  in fuzzerNewStem()
893   pCur->nStem++;  in fuzzerNewStem()
902   fuzzer_cursor *pCur = (fuzzer_cursor*)cur;  in fuzzerNext()  local
906   pCur->iRowid++;  in fuzzerNext()
911   pStem = pCur->pStem;  in fuzzerNext()
913     rc = fuzzerRender(pStem, &pCur->zBuf, &pCur->nBuf);  in fuzzerNext()
915     pNew = fuzzerNewStem(pCur, pCur->zBuf, pStem->rCostX);  in fuzzerNext()
917       if( fuzzerAdvance(pCur, pNew)==0 ){  in fuzzerNext()
918         pNew->pNext = pCur->pDone;  in fuzzerNext()
919         pCur->pDone = pNew;  in fuzzerNext()
921         if( fuzzerInsert(pCur, pNew)==pNew ){  in fuzzerNext()
933   while( (pStem = pCur->pStem)!=0 ){  in fuzzerNext()
934     int res = fuzzerAdvance(pCur, pStem);  in fuzzerNext()
938       pCur->pStem = 0;  in fuzzerNext()
939       pStem = fuzzerInsert(pCur, pStem);  in fuzzerNext()
940       if( (rc = fuzzerSeen(pCur, pStem))!=0 ){  in fuzzerNext()
946     pCur->pStem = 0;  in fuzzerNext()
947     pStem->pNext = pCur->pDone;  in fuzzerNext()
948     pCur->pDone = pStem;  in fuzzerNext()
949     if( fuzzerLowestCostStem(pCur) ){  in fuzzerNext()
950       rc = fuzzerSeen(pCur, pCur->pStem);  in fuzzerNext()
960   pCur->rLimit = (fuzzer_cost)0;  in fuzzerNext()
974   fuzzer_cursor *pCur = (fuzzer_cursor *)pVtabCursor;  in fuzzerFilter()  local
979   fuzzerClearCursor(pCur, 1);  in fuzzerFilter()
980   pCur->rLimit = 2147483647;  in fuzzerFilter()
987     pCur->rLimit = (fuzzer_cost)sqlite3_value_int(argv[idx]);  in fuzzerFilter()
991     pCur->iRuleset = (fuzzer_cost)sqlite3_value_int(argv[idx]);  in fuzzerFilter()
994   pCur->nullRule.pNext = pCur->pVtab->pRule;  in fuzzerFilter()
995   pCur->nullRule.rCost = 0;  in fuzzerFilter()
996   pCur->nullRule.nFrom = 0;  in fuzzerFilter()
997   pCur->nullRule.nTo = 0;  in fuzzerFilter()
998   pCur->nullRule.zFrom = "";  in fuzzerFilter()
999   pCur->iRowid = 1;  in fuzzerFilter()
1000   assert( pCur->pStem==0 );  in fuzzerFilter()
1005     pCur->pStem = pStem = fuzzerNewStem(pCur, zWord, (fuzzer_cost)0);  in fuzzerFilter()
1007     pStem->pRule = &pCur->nullRule;  in fuzzerFilter()
1010     pCur->rLimit = 0;  in fuzzerFilter()
1021   fuzzer_cursor *pCur = (fuzzer_cursor*)cur;  in fuzzerColumn()  local
1024     if( fuzzerRender(pCur->pStem, &pCur->zBuf, &pCur->nBuf)==SQLITE_NOMEM ){  in fuzzerColumn()
1027     sqlite3_result_text(ctx, pCur->zBuf, -1, SQLITE_TRANSIENT);  in fuzzerColumn()
1030     sqlite3_result_int(ctx, pCur->pStem->rCostX);  in fuzzerColumn()
1042   fuzzer_cursor *pCur = (fuzzer_cursor*)cur;  in fuzzerRowid()  local
1043   *pRowid = pCur->iRowid;  in fuzzerRowid()
1052   fuzzer_cursor *pCur = (fuzzer_cursor*)cur;  in fuzzerEof()  local
1053   return pCur->rLimit<=(fuzzer_cost)0;  in fuzzerEof()