typedef unsigned char  u8;
typedef unsigned int   u32;
typedef unsigned short u16;
typedef sqlite3_int64 i64;
typedef sqlite3_uint64 u64;

#define ArraySize(x) (sizeof(x) / sizeof(x[0]))

#define testcase(x)
#define ALWAYS(x) 1
#define NEVER(x) 0

#define MIN(x,y) (((x) < (y)) ? (x) : (y))
#define MAX(x,y) (((x) > (y)) ? (x) : (y))
................................................................................
** The various operations on open token or token prefix iterators opened
** using sqlite3Fts5IndexQuery().
*/
int sqlite3Fts5IterEof(Fts5IndexIter*);
int sqlite3Fts5IterNext(Fts5IndexIter*);
int sqlite3Fts5IterNextFrom(Fts5IndexIter*, i64 iMatch);
i64 sqlite3Fts5IterRowid(Fts5IndexIter*);
int sqlite3Fts5IterPoslist(Fts5IndexIter*,Fts5Colset*, const u8**, int*, i64*);
int sqlite3Fts5IterPoslistBuffer(Fts5IndexIter *pIter, Fts5Buffer *pBuf);

/*
** Close an iterator opened by sqlite3Fts5IndexQuery().
*/
void sqlite3Fts5IterClose(Fts5IndexIter*);

/*
** This interface is used by the fts5vocab module.
*/
const char *sqlite3Fts5IterTerm(Fts5IndexIter*, int*);
int sqlite3Fts5IterNextScan(Fts5IndexIter*);

int sqlite3Fts5IterCollist(Fts5IndexIter*, const u8 **, int*);


/*
** Insert or remove data to or from the index. Each time a document is 
** added to or removed from the index, this function is called one or more
** times.
**
** For an insert, it must be called once for each token in the new document.

typedef unsigned char  u8;
typedef unsigned int   u32;
typedef unsigned short u16;
typedef sqlite3_int64 i64;
typedef sqlite3_uint64 u64;

#define ArraySize(x) ((int)(sizeof(x) / sizeof(x[0])))

#define testcase(x)
#define ALWAYS(x) 1
#define NEVER(x) 0

#define MIN(x,y) (((x) < (y)) ? (x) : (y))
#define MAX(x,y) (((x) > (y)) ? (x) : (y))
................................................................................
** The various operations on open token or token prefix iterators opened
** using sqlite3Fts5IndexQuery().
*/
int sqlite3Fts5IterEof(Fts5IndexIter*);
int sqlite3Fts5IterNext(Fts5IndexIter*);
int sqlite3Fts5IterNextFrom(Fts5IndexIter*, i64 iMatch);
i64 sqlite3Fts5IterRowid(Fts5IndexIter*);



/*
** Close an iterator opened by sqlite3Fts5IndexQuery().
*/
void sqlite3Fts5IterClose(Fts5IndexIter*);

/*
** This interface is used by the fts5vocab module.
*/
const char *sqlite3Fts5IterTerm(Fts5IndexIter*, int*);
int sqlite3Fts5IterNextScan(Fts5IndexIter*);




/*
** Insert or remove data to or from the index. Each time a document is 
** added to or removed from the index, this function is called one or more
** times.
**
** For an insert, it must be called once for each token in the new document.

    { "snippet",   0, fts5SnippetFunction, 0 },
    { "highlight", 0, fts5HighlightFunction, 0 },
    { "bm25",      0, fts5Bm25Function,    0 },
  };
  int rc = SQLITE_OK;             /* Return code */
  int i;                          /* To iterate through builtin functions */

  for(i=0; rc==SQLITE_OK && i<(int)ArraySize(aBuiltin); i++){
    rc = pApi->xCreateFunction(pApi,
        aBuiltin[i].zFunc,
        aBuiltin[i].pUserData,
        aBuiltin[i].xFunc,
        aBuiltin[i].xDestroy
    );
  }

  return rc;
}

    { "snippet",   0, fts5SnippetFunction, 0 },
    { "highlight", 0, fts5HighlightFunction, 0 },
    { "bm25",      0, fts5Bm25Function,    0 },
  };
  int rc = SQLITE_OK;             /* Return code */
  int i;                          /* To iterate through builtin functions */

  for(i=0; rc==SQLITE_OK && i<ArraySize(aBuiltin); i++){
    rc = pApi->xCreateFunction(pApi,
        aBuiltin[i].zFunc,
        aBuiltin[i].pUserData,
        aBuiltin[i].xFunc,
        aBuiltin[i].xDestroy
    );
  }

  return rc;
}

  const char *pTerm, int nTerm, 
  int *pbPresent
){
  int rc = SQLITE_OK;
  *pbPresent = 0;
  if( p ){
    int i;
    int hash = 13;
    Fts5TermsetEntry *pEntry;

    /* Calculate a hash value for this term. This is the same hash checksum
    ** used by the fts5_hash.c module. This is not important for correct
    ** operation of the module, but is necessary to ensure that some tests
    ** designed to produce hash table collisions really do work.  */
    for(i=nTerm-1; i>=0; i--){
................................................................................
    hash = (hash << 3) ^ hash ^ iIdx;
    hash = hash % ArraySize(p->apHash);

    for(pEntry=p->apHash[hash]; pEntry; pEntry=pEntry->pNext){
      if( pEntry->iIdx==iIdx 
          && pEntry->nTerm==nTerm 
          && memcmp(pEntry->pTerm, pTerm, nTerm)==0 
        ){
        *pbPresent = 1;
        break;
      }
    }

    if( pEntry==0 ){
      pEntry = sqlite3Fts5MallocZero(&rc, sizeof(Fts5TermsetEntry) + nTerm);

  const char *pTerm, int nTerm, 
  int *pbPresent
){
  int rc = SQLITE_OK;
  *pbPresent = 0;
  if( p ){
    int i;
    u32 hash = 13;
    Fts5TermsetEntry *pEntry;

    /* Calculate a hash value for this term. This is the same hash checksum
    ** used by the fts5_hash.c module. This is not important for correct
    ** operation of the module, but is necessary to ensure that some tests
    ** designed to produce hash table collisions really do work.  */
    for(i=nTerm-1; i>=0; i--){
................................................................................
    hash = (hash << 3) ^ hash ^ iIdx;
    hash = hash % ArraySize(p->apHash);

    for(pEntry=p->apHash[hash]; pEntry; pEntry=pEntry->pNext){
      if( pEntry->iIdx==iIdx 
          && pEntry->nTerm==nTerm 
          && memcmp(pEntry->pTerm, pTerm, nTerm)==0 
      ){
        *pbPresent = 1;
        break;
      }
    }

    if( pEntry==0 ){
      pEntry = sqlite3Fts5MallocZero(&rc, sizeof(Fts5TermsetEntry) + nTerm);

** Argument pTerm must be a synonym iterator.
*/
static int fts5ExprSynonymList(
  Fts5ExprTerm *pTerm, 
  int bCollist, 
  Fts5Colset *pColset,
  i64 iRowid,
  int *pbDel,                     /* OUT: Caller should sqlite3_free(*pa) */
  u8 **pa, int *pn
){
  Fts5PoslistReader aStatic[4];
  Fts5PoslistReader *aIter = aStatic;
  int nIter = 0;
  int nAlloc = 4;
  int rc = SQLITE_OK;
  Fts5ExprTerm *p;

  assert( pTerm->pSynonym );
  for(p=pTerm; p; p=p->pSynonym){
    Fts5IndexIter *pIter = p->pIter;
    if( sqlite3Fts5IterEof(pIter)==0 && sqlite3Fts5IterRowid(pIter)==iRowid ){
      const u8 *a;
      int n;

      if( 0 && bCollist ){
        rc = sqlite3Fts5IterCollist(pIter, &a, &n);
      }else{
        i64 dummy;
#if 0
        rc = sqlite3Fts5IterPoslist(pIter, pColset, &a, &n, &dummy);
#endif
        a = pIter->pData;
        n = pIter->nData;
      }

      if( rc!=SQLITE_OK ) goto synonym_poslist_out;
      if( n==0 ) continue;
      if( nIter==nAlloc ){
        int nByte = sizeof(Fts5PoslistReader) * nAlloc * 2;
        Fts5PoslistReader *aNew = (Fts5PoslistReader*)sqlite3_malloc(nByte);
        if( aNew==0 ){
          rc = SQLITE_NOMEM;
          goto synonym_poslist_out;
        }
        memcpy(aNew, aIter, sizeof(Fts5PoslistReader) * nIter);
        nAlloc = nAlloc*2;
        if( aIter!=aStatic ) sqlite3_free(aIter);
        aIter = aNew;
      }
      sqlite3Fts5PoslistReaderInit(a, n, &aIter[nIter]);
      assert( aIter[nIter].bEof==0 );
      nIter++;
    }
  }

  assert( *pbDel==0 );
  if( nIter==1 ){
    *pa = (u8*)aIter[0].a;
    *pn = aIter[0].n;
  }else{
    Fts5PoslistWriter writer = {0};
    Fts5Buffer buf = {0,0,0};
    i64 iPrev = -1;

    while( 1 ){
      int i;
      i64 iMin = FTS5_LARGEST_INT64;
      for(i=0; i<nIter; i++){
        if( aIter[i].bEof==0 ){
          if( aIter[i].iPos==iPrev ){
            if( sqlite3Fts5PoslistReaderNext(&aIter[i]) ) continue;
................................................................................
          }
          if( aIter[i].iPos<iMin ){
            iMin = aIter[i].iPos;
          }
        }
      }
      if( iMin==FTS5_LARGEST_INT64 || rc!=SQLITE_OK ) break;
      rc = sqlite3Fts5PoslistWriterAppend(&buf, &writer, iMin);
      iPrev = iMin;
    }
    if( rc ){
      sqlite3_free(buf.p);
    }else{
      *pa = buf.p;
      *pn = buf.n;
      *pbDel = 1;
    }
  }

 synonym_poslist_out:
  if( aIter!=aStatic ) sqlite3_free(aIter);
  return rc;
}
................................................................................
  int i;
  int rc = SQLITE_OK;
  
  fts5BufferZero(&pPhrase->poslist);

  /* If the aStatic[] array is not large enough, allocate a large array
  ** using sqlite3_malloc(). This approach could be improved upon. */
  if( pPhrase->nTerm>(int)ArraySize(aStatic) ){
    int nByte = sizeof(Fts5PoslistReader) * pPhrase->nTerm;
    aIter = (Fts5PoslistReader*)sqlite3_malloc(nByte);
    if( !aIter ) return SQLITE_NOMEM;
  }
  memset(aIter, 0, sizeof(Fts5PoslistReader) * pPhrase->nTerm);

  /* Initialize a term iterator for each term in the phrase */
  for(i=0; i<pPhrase->nTerm; i++){
    Fts5ExprTerm *pTerm = &pPhrase->aTerm[i];
    i64 dummy;
    int n = 0;
    int bFlag = 0;
    const u8 *a = 0;
    if( pTerm->pSynonym ){

      rc = fts5ExprSynonymList(
          pTerm, 0, pColset, pNode->iRowid, &bFlag, (u8**)&a, &n
      );





    }else{
      Fts5IndexIter *pIter = pTerm->pIter;
#if 0
      rc = sqlite3Fts5IterPoslist(pTerm->pIter, pColset, &a, &n, &dummy);
#endif
      a = pIter->pData;
      n = pIter->nData;
    }
    if( rc!=SQLITE_OK ) goto ismatch_out;
    sqlite3Fts5PoslistReaderInit(a, n, &aIter[i]);
    aIter[i].bFlag = (u8)bFlag;
    if( aIter[i].bEof ) goto ismatch_out;
  }

  while( 1 ){
    int bMatch;
................................................................................
  int rc = *pRc;
  int bMatch;

  assert( pNear->nPhrase>1 );

  /* If the aStatic[] array is not large enough, allocate a large array
  ** using sqlite3_malloc(). This approach could be improved upon. */
  if( pNear->nPhrase>(int)ArraySize(aStatic) ){
    int nByte = sizeof(Fts5NearTrimmer) * pNear->nPhrase;
    a = (Fts5NearTrimmer*)sqlite3Fts5MallocZero(&rc, nByte);
  }else{
    memset(aStatic, 0, sizeof(aStatic));
  }
  if( rc!=SQLITE_OK ){
    *pRc = rc;
................................................................................
    int i;
    for(i=0; i<pPhrase->nTerm; i++){
      Fts5ExprTerm *pSyn;
      Fts5ExprTerm *pNext;
      Fts5ExprTerm *pTerm = &pPhrase->aTerm[i];
      sqlite3_free(pTerm->zTerm);
      sqlite3Fts5IterClose(pTerm->pIter);

      for(pSyn=pTerm->pSynonym; pSyn; pSyn=pNext){
        pNext = pSyn->pSynonym;
        sqlite3Fts5IterClose(pSyn->pIter);

        sqlite3_free(pSyn);
      }
    }
    if( pPhrase->poslist.nSpace>0 ) fts5BufferFree(&pPhrase->poslist);
    sqlite3_free(pPhrase);
  }
}
................................................................................

  /* If an error has already occurred, this is a no-op */
  if( pCtx->rc!=SQLITE_OK ) return pCtx->rc;

  assert( pPhrase==0 || pPhrase->nTerm>0 );
  if( pPhrase && (tflags & FTS5_TOKEN_COLOCATED) ){
    Fts5ExprTerm *pSyn;
    int nByte = sizeof(Fts5ExprTerm) + nToken+1;
    pSyn = (Fts5ExprTerm*)sqlite3_malloc(nByte);
    if( pSyn==0 ){
      rc = SQLITE_NOMEM;
    }else{
      memset(pSyn, 0, nByte);
      pSyn->zTerm = (char*)&pSyn[1];
      memcpy(pSyn->zTerm, pToken, nToken);
      pSyn->pSynonym = pPhrase->aTerm[pPhrase->nTerm-1].pSynonym;
      pPhrase->aTerm[pPhrase->nTerm-1].pSynonym = pSyn;
    }
  }else{
    Fts5ExprTerm *pTerm;
    if( pPhrase==0 || (pPhrase->nTerm % SZALLOC)==0 ){
................................................................................
    { "fts5_isalnum",  fts5ExprIsAlnum },
    { "fts5_fold",     fts5ExprFold },
  };
  int i;
  int rc = SQLITE_OK;
  void *pCtx = (void*)pGlobal;

  for(i=0; rc==SQLITE_OK && i<(int)ArraySize(aFunc); i++){
    struct Fts5ExprFunc *p = &aFunc[i];
    rc = sqlite3_create_function(db, p->z, -1, SQLITE_UTF8, pCtx, p->x, 0, 0);
  }

  /* Avoid a warning indicating that sqlite3Fts5ParserTrace() is unused */
#ifndef NDEBUG
  (void)sqlite3Fts5ParserTrace;
................................................................................

  if( pNode->bEof==0 
   && pNode->iRowid==pExpr->pRoot->iRowid 
   && pPhrase->poslist.n>0
  ){
    Fts5ExprTerm *pTerm = &pPhrase->aTerm[0];
    if( pTerm->pSynonym ){
      int bDel = 0;
      u8 *a;
      rc = fts5ExprSynonymList(
          pTerm, 1, 0, pNode->iRowid, &bDel, &a, pnCollist
      );
      if( bDel ){
        sqlite3Fts5BufferSet(&rc, &pPhrase->poslist, *pnCollist, a);
        *ppCollist = pPhrase->poslist.p;
        sqlite3_free(a);
      }else{
        *ppCollist = a;
      }
    }else{
      *ppCollist = pPhrase->aTerm[0].pIter->pData;
      *pnCollist = pPhrase->aTerm[0].pIter->nData;
    }
  }else{
    *ppCollist = 0;
    *pnCollist = 0;
  }

  return rc;
}

** Argument pTerm must be a synonym iterator.
*/
static int fts5ExprSynonymList(
  Fts5ExprTerm *pTerm, 
  int bCollist, 
  Fts5Colset *pColset,
  i64 iRowid,
  Fts5Buffer *pBuf,               /* Use this buffer for space if required */
  u8 **pa, int *pn
){
  Fts5PoslistReader aStatic[4];
  Fts5PoslistReader *aIter = aStatic;
  int nIter = 0;
  int nAlloc = 4;
  int rc = SQLITE_OK;
  Fts5ExprTerm *p;

  assert( pTerm->pSynonym );
  for(p=pTerm; p; p=p->pSynonym){
    Fts5IndexIter *pIter = p->pIter;
    if( sqlite3Fts5IterEof(pIter)==0 && sqlite3Fts5IterRowid(pIter)==iRowid ){















      if( pIter->nData==0 ) continue;
      if( nIter==nAlloc ){
        int nByte = sizeof(Fts5PoslistReader) * nAlloc * 2;
        Fts5PoslistReader *aNew = (Fts5PoslistReader*)sqlite3_malloc(nByte);
        if( aNew==0 ){
          rc = SQLITE_NOMEM;
          goto synonym_poslist_out;
        }
        memcpy(aNew, aIter, sizeof(Fts5PoslistReader) * nIter);
        nAlloc = nAlloc*2;
        if( aIter!=aStatic ) sqlite3_free(aIter);
        aIter = aNew;
      }
      sqlite3Fts5PoslistReaderInit(pIter->pData, pIter->nData, &aIter[nIter]);
      assert( aIter[nIter].bEof==0 );
      nIter++;
    }
  }


  if( nIter==1 ){
    *pa = (u8*)aIter[0].a;
    *pn = aIter[0].n;
  }else{
    Fts5PoslistWriter writer = {0};

    i64 iPrev = -1;
    fts5BufferZero(pBuf);
    while( 1 ){
      int i;
      i64 iMin = FTS5_LARGEST_INT64;
      for(i=0; i<nIter; i++){
        if( aIter[i].bEof==0 ){
          if( aIter[i].iPos==iPrev ){
            if( sqlite3Fts5PoslistReaderNext(&aIter[i]) ) continue;
................................................................................
          }
          if( aIter[i].iPos<iMin ){
            iMin = aIter[i].iPos;
          }
        }
      }
      if( iMin==FTS5_LARGEST_INT64 || rc!=SQLITE_OK ) break;
      rc = sqlite3Fts5PoslistWriterAppend(pBuf, &writer, iMin);
      iPrev = iMin;
    }
    if( rc==SQLITE_OK ){


      *pa = pBuf->p;
      *pn = pBuf->n;

    }
  }

 synonym_poslist_out:
  if( aIter!=aStatic ) sqlite3_free(aIter);
  return rc;
}
................................................................................
  int i;
  int rc = SQLITE_OK;
  
  fts5BufferZero(&pPhrase->poslist);

  /* If the aStatic[] array is not large enough, allocate a large array
  ** using sqlite3_malloc(). This approach could be improved upon. */
  if( pPhrase->nTerm>ArraySize(aStatic) ){
    int nByte = sizeof(Fts5PoslistReader) * pPhrase->nTerm;
    aIter = (Fts5PoslistReader*)sqlite3_malloc(nByte);
    if( !aIter ) return SQLITE_NOMEM;
  }
  memset(aIter, 0, sizeof(Fts5PoslistReader) * pPhrase->nTerm);

  /* Initialize a term iterator for each term in the phrase */
  for(i=0; i<pPhrase->nTerm; i++){
    Fts5ExprTerm *pTerm = &pPhrase->aTerm[i];

    int n = 0;
    int bFlag = 0;
    u8 *a = 0;
    if( pTerm->pSynonym ){
      Fts5Buffer buf = {0, 0, 0};
      rc = fts5ExprSynonymList(
          pTerm, 0, pColset, pNode->iRowid, &buf, &a, &n
      );
      if( rc ){
        sqlite3_free(a);
        goto ismatch_out;
      }
      if( a==buf.p ) bFlag = 1;
    }else{




      a = (u8*)pTerm->pIter->pData;
      n = pTerm->pIter->nData;
    }

    sqlite3Fts5PoslistReaderInit(a, n, &aIter[i]);
    aIter[i].bFlag = (u8)bFlag;
    if( aIter[i].bEof ) goto ismatch_out;
  }

  while( 1 ){
    int bMatch;
................................................................................
  int rc = *pRc;
  int bMatch;

  assert( pNear->nPhrase>1 );

  /* If the aStatic[] array is not large enough, allocate a large array
  ** using sqlite3_malloc(). This approach could be improved upon. */
  if( pNear->nPhrase>ArraySize(aStatic) ){
    int nByte = sizeof(Fts5NearTrimmer) * pNear->nPhrase;
    a = (Fts5NearTrimmer*)sqlite3Fts5MallocZero(&rc, nByte);
  }else{
    memset(aStatic, 0, sizeof(aStatic));
  }
  if( rc!=SQLITE_OK ){
    *pRc = rc;
................................................................................
    int i;
    for(i=0; i<pPhrase->nTerm; i++){
      Fts5ExprTerm *pSyn;
      Fts5ExprTerm *pNext;
      Fts5ExprTerm *pTerm = &pPhrase->aTerm[i];
      sqlite3_free(pTerm->zTerm);
      sqlite3Fts5IterClose(pTerm->pIter);

      for(pSyn=pTerm->pSynonym; pSyn; pSyn=pNext){
        pNext = pSyn->pSynonym;
        sqlite3Fts5IterClose(pSyn->pIter);
        fts5BufferFree((Fts5Buffer*)&pSyn[1]);
        sqlite3_free(pSyn);
      }
    }
    if( pPhrase->poslist.nSpace>0 ) fts5BufferFree(&pPhrase->poslist);
    sqlite3_free(pPhrase);
  }
}
................................................................................

  /* If an error has already occurred, this is a no-op */
  if( pCtx->rc!=SQLITE_OK ) return pCtx->rc;

  assert( pPhrase==0 || pPhrase->nTerm>0 );
  if( pPhrase && (tflags & FTS5_TOKEN_COLOCATED) ){
    Fts5ExprTerm *pSyn;
    int nByte = sizeof(Fts5ExprTerm) + sizeof(Fts5Buffer) + nToken+1;
    pSyn = (Fts5ExprTerm*)sqlite3_malloc(nByte);
    if( pSyn==0 ){
      rc = SQLITE_NOMEM;
    }else{
      memset(pSyn, 0, nByte);
      pSyn->zTerm = ((char*)pSyn) + sizeof(Fts5ExprTerm) + sizeof(Fts5Buffer);
      memcpy(pSyn->zTerm, pToken, nToken);
      pSyn->pSynonym = pPhrase->aTerm[pPhrase->nTerm-1].pSynonym;
      pPhrase->aTerm[pPhrase->nTerm-1].pSynonym = pSyn;
    }
  }else{
    Fts5ExprTerm *pTerm;
    if( pPhrase==0 || (pPhrase->nTerm % SZALLOC)==0 ){
................................................................................
    { "fts5_isalnum",  fts5ExprIsAlnum },
    { "fts5_fold",     fts5ExprFold },
  };
  int i;
  int rc = SQLITE_OK;
  void *pCtx = (void*)pGlobal;

  for(i=0; rc==SQLITE_OK && i<ArraySize(aFunc); i++){
    struct Fts5ExprFunc *p = &aFunc[i];
    rc = sqlite3_create_function(db, p->z, -1, SQLITE_UTF8, pCtx, p->x, 0, 0);
  }

  /* Avoid a warning indicating that sqlite3Fts5ParserTrace() is unused */
#ifndef NDEBUG
  (void)sqlite3Fts5ParserTrace;
................................................................................

  if( pNode->bEof==0 
   && pNode->iRowid==pExpr->pRoot->iRowid 
   && pPhrase->poslist.n>0
  ){
    Fts5ExprTerm *pTerm = &pPhrase->aTerm[0];
    if( pTerm->pSynonym ){
      Fts5Buffer *pBuf = (Fts5Buffer*)&pTerm->pSynonym[1];

      rc = fts5ExprSynonymList(
          pTerm, 1, 0, pNode->iRowid, pBuf, (u8**)ppCollist, pnCollist
      );







    }else{
      *ppCollist = pPhrase->aTerm[0].pIter->pData;
      *pnCollist = pPhrase->aTerm[0].pIter->nData;
    }
  }else{
    *ppCollist = 0;
    *pnCollist = 0;
  }

  return rc;
}

const char *sqlite3Fts5IterTerm(Fts5IndexIter *pIndexIter, int *pn){
  int n;
  const char *z = (const char*)fts5MultiIterTerm((Fts5Iter*)pIndexIter, &n);
  *pn = n-1;
  return &z[1];
}


/*
** Return a pointer to a buffer containing a copy of the position list for
** the current entry. Output variable *pn is set to the size of the buffer 
** in bytes before returning.
**
** The returned position list does not include the "number of bytes" varint
** field that starts the position list on disk.
*/
int sqlite3Fts5IterPoslist(
  Fts5IndexIter *pIndexIter, 
  Fts5Colset *pColset,            /* Column filter (or NULL) */
  const u8 **pp,                  /* OUT: Pointer to position-list data */
  int *pn,                        /* OUT: Size of position-list in bytes */
  i64 *piRowid                    /* OUT: Current rowid */
){
  Fts5Iter *pIter = (Fts5Iter*)pIndexIter;
  Fts5SegIter *pSeg = &pIter->aSeg[ pIter->aFirst[1].iFirst ];
  int eDetail = pIter->pIndex->pConfig->eDetail;

  assert( pIter->pIndex->rc==SQLITE_OK );
  *piRowid = pSeg->iRowid;
  if( eDetail==FTS5_DETAIL_NONE ){
    *pn = pSeg->nPos;
  }else
  if( eDetail==FTS5_DETAIL_FULL 
   && pSeg->iLeafOffset+pSeg->nPos<=pSeg->pLeaf->szLeaf 
  ){
    u8 *pPos = &pSeg->pLeaf->p[pSeg->iLeafOffset];
    if( pColset==0 || pIter->bFiltered ){
      *pn = pSeg->nPos;
      *pp = pPos;
    }else if( pColset->nCol==1 ){
      *pp = pPos;
      *pn = fts5IndexExtractCol(pp, pSeg->nPos, pColset->aiCol[0]);
    }else{
      fts5BufferZero(&pIter->poslist);
      fts5IndexExtractColset(pColset, pPos, pSeg->nPos, &pIter->poslist);
      *pp = pIter->poslist.p;
      *pn = pIter->poslist.n;
    }
  }else{
    fts5BufferZero(&pIter->poslist);
    fts5SegiterPoslist(pIter->pIndex, pSeg, pColset, &pIter->poslist);
    if( eDetail==FTS5_DETAIL_FULL ){
      *pp = pIter->poslist.p;
    }
    *pn = pIter->poslist.n;
  }
  return fts5IndexReturn(pIter->pIndex);
}

int sqlite3Fts5IterCollist(
  Fts5IndexIter *pIndexIter, 
  const u8 **pp,                  /* OUT: Pointer to position-list data */
  int *pn                         /* OUT: Size of position-list in bytes */
){
  Fts5Iter *pIter = (Fts5Iter*)pIndexIter;
  assert( pIter->pIndex->pConfig->eDetail==FTS5_DETAIL_COLUMNS );
  *pp = pIter->poslist.p;
  *pn = pIter->poslist.n;
  return SQLITE_OK;
}

/*
** This function is similar to sqlite3Fts5IterPoslist(), except that it
** copies the position list into the buffer supplied as the second 
** argument.
*/
int sqlite3Fts5IterPoslistBuffer(Fts5IndexIter *pIndexIter, Fts5Buffer *pBuf){
  Fts5Iter *pIter = (Fts5Iter*)pIndexIter;
  Fts5Index *p = pIter->pIndex;
  Fts5SegIter *pSeg = &pIter->aSeg[ pIter->aFirst[1].iFirst ];
  assert( p->rc==SQLITE_OK );
  fts5BufferZero(pBuf);
  fts5SegiterPoslist(p, pSeg, 0, pBuf);
  return fts5IndexReturn(p);
}

/*
** Close an iterator opened by an earlier call to sqlite3Fts5IndexQuery().
*/
void sqlite3Fts5IterClose(Fts5IndexIter *pIndexIter){
  if( pIndexIter ){
    Fts5Iter *pIter = (Fts5Iter*)pIndexIter;
    Fts5Index *pIndex = pIter->pIndex;

const char *sqlite3Fts5IterTerm(Fts5IndexIter *pIndexIter, int *pn){
  int n;
  const char *z = (const char*)fts5MultiIterTerm((Fts5Iter*)pIndexIter, &n);
  *pn = n-1;
  return &z[1];
}
















































































/*
** Close an iterator opened by an earlier call to sqlite3Fts5IndexQuery().
*/
void sqlite3Fts5IterClose(Fts5IndexIter *pIndexIter){
  if( pIndexIter ){
    Fts5Iter *pIter = (Fts5Iter*)pIndexIter;
    Fts5Index *pIndex = pIter->pIndex;

  aColMap[1] = pConfig->nCol;
  aColMap[2] = pConfig->nCol+1;

  /* Set idxFlags flags for all WHERE clause terms that will be used. */
  for(i=0; i<pInfo->nConstraint; i++){
    struct sqlite3_index_constraint *p = &pInfo->aConstraint[i];
    int j;
    for(j=0; j<(int)ArraySize(aConstraint); j++){
      struct Constraint *pC = &aConstraint[j];
      if( p->iColumn==aColMap[pC->iCol] && p->op & pC->op ){
        if( p->usable ){
          pC->iConsIndex = i;
          idxFlags |= pC->fts5op;
        }else if( j==0 ){
          /* As there exists an unusable MATCH constraint this is an 
................................................................................
    pInfo->estimatedCost = bHasMatch ? 750.0 : 750000.0;
  }else{
    pInfo->estimatedCost = bHasMatch ? 1000.0 : 1000000.0;
  }

  /* Assign argvIndex values to each constraint in use. */
  iNext = 1;
  for(i=0; i<(int)ArraySize(aConstraint); i++){
    struct Constraint *pC = &aConstraint[i];
    if( pC->iConsIndex>=0 ){
      pInfo->aConstraintUsage[pC->iConsIndex].argvIndex = iNext++;
      pInfo->aConstraintUsage[pC->iConsIndex].omit = (unsigned char)pC->omit;
    }
  }

  aColMap[1] = pConfig->nCol;
  aColMap[2] = pConfig->nCol+1;

  /* Set idxFlags flags for all WHERE clause terms that will be used. */
  for(i=0; i<pInfo->nConstraint; i++){
    struct sqlite3_index_constraint *p = &pInfo->aConstraint[i];
    int j;
    for(j=0; j<ArraySize(aConstraint); j++){
      struct Constraint *pC = &aConstraint[j];
      if( p->iColumn==aColMap[pC->iCol] && p->op & pC->op ){
        if( p->usable ){
          pC->iConsIndex = i;
          idxFlags |= pC->fts5op;
        }else if( j==0 ){
          /* As there exists an unusable MATCH constraint this is an 
................................................................................
    pInfo->estimatedCost = bHasMatch ? 750.0 : 750000.0;
  }else{
    pInfo->estimatedCost = bHasMatch ? 1000.0 : 1000000.0;
  }

  /* Assign argvIndex values to each constraint in use. */
  iNext = 1;
  for(i=0; i<ArraySize(aConstraint); i++){
    struct Constraint *pC = &aConstraint[i];
    if( pC->iConsIndex>=0 ){
      pInfo->aConstraintUsage[pC->iConsIndex].argvIndex = iNext++;
      pInfo->aConstraintUsage[pC->iConsIndex].omit = (unsigned char)pC->omit;
    }
  }

*/
int sqlite3Fts5StorageClose(Fts5Storage *p){
  int rc = SQLITE_OK;
  if( p ){
    int i;

    /* Finalize all SQL statements */
    for(i=0; i<(int)ArraySize(p->aStmt); i++){
      sqlite3_finalize(p->aStmt[i]);
    }

    sqlite3_free(p);
  }
  return rc;
}

*/
int sqlite3Fts5StorageClose(Fts5Storage *p){
  int rc = SQLITE_OK;
  if( p ){
    int i;

    /* Finalize all SQL statements */
    for(i=0; i<ArraySize(p->aStmt); i++){
      sqlite3_finalize(p->aStmt[i]);
    }

    sqlite3_free(p);
  }
  return rc;
}

    { "ascii",     {fts5AsciiCreate, fts5AsciiDelete, fts5AsciiTokenize }},
    { "porter",    {fts5PorterCreate, fts5PorterDelete, fts5PorterTokenize }},
  };
  
  int rc = SQLITE_OK;             /* Return code */
  int i;                          /* To iterate through builtin functions */

  for(i=0; rc==SQLITE_OK && i<(int)ArraySize(aBuiltin); i++){
    rc = pApi->xCreateTokenizer(pApi,
        aBuiltin[i].zName,
        (void*)pApi,
        &aBuiltin[i].x,
        0
    );
  }

  return rc;
}

    { "ascii",     {fts5AsciiCreate, fts5AsciiDelete, fts5AsciiTokenize }},
    { "porter",    {fts5PorterCreate, fts5PorterDelete, fts5PorterTokenize }},
  };
  
  int rc = SQLITE_OK;             /* Return code */
  int i;                          /* To iterate through builtin functions */

  for(i=0; rc==SQLITE_OK && i<ArraySize(aBuiltin); i++){
    rc = pApi->xCreateTokenizer(pApi,
        aBuiltin[i].zName,
        (void*)pApi,
        &aBuiltin[i].x,
        0
    );
  }

  return rc;
}

    const char *zType = bDb ? argv[5] : argv[4];
    int nDb = (int)strlen(zDb)+1; 
    int nTab = (int)strlen(zTab)+1;
    int eType = 0;
    
    rc = fts5VocabTableType(zType, pzErr, &eType);
    if( rc==SQLITE_OK ){
      assert( eType>=0 && eType<sizeof(azSchema)/sizeof(azSchema[0]) );
      rc = sqlite3_declare_vtab(db, azSchema[eType]);
    }

    nByte = sizeof(Fts5VocabTable) + nDb + nTab;
    pRet = sqlite3Fts5MallocZero(&rc, nByte);
    if( pRet ){
      pRet->pGlobal = (Fts5Global*)pAux;
................................................................................
      sqlite3Fts5BufferSet(&rc, &pCsr->term, nTerm, (const u8*)zTerm);
      memset(pCsr->aCnt, 0, nCol * sizeof(i64));
      memset(pCsr->aDoc, 0, nCol * sizeof(i64));
      pCsr->iCol = 0;

      assert( pTab->eType==FTS5_VOCAB_COL || pTab->eType==FTS5_VOCAB_ROW );
      while( rc==SQLITE_OK ){
        i64 dummy;
        const u8 *pPos; int nPos;   /* Position list */
        i64 iPos = 0;               /* 64-bit position read from poslist */
        int iOff = 0;               /* Current offset within position list */

        pPos = pCsr->pIter->pData;
        nPos = pCsr->pIter->nData;
        switch( pCsr->pConfig->eDetail ){

    const char *zType = bDb ? argv[5] : argv[4];
    int nDb = (int)strlen(zDb)+1; 
    int nTab = (int)strlen(zTab)+1;
    int eType = 0;
    
    rc = fts5VocabTableType(zType, pzErr, &eType);
    if( rc==SQLITE_OK ){
      assert( eType>=0 && eType<ArraySize(azSchema) );
      rc = sqlite3_declare_vtab(db, azSchema[eType]);
    }

    nByte = sizeof(Fts5VocabTable) + nDb + nTab;
    pRet = sqlite3Fts5MallocZero(&rc, nByte);
    if( pRet ){
      pRet->pGlobal = (Fts5Global*)pAux;
................................................................................
      sqlite3Fts5BufferSet(&rc, &pCsr->term, nTerm, (const u8*)zTerm);
      memset(pCsr->aCnt, 0, nCol * sizeof(i64));
      memset(pCsr->aDoc, 0, nCol * sizeof(i64));
      pCsr->iCol = 0;

      assert( pTab->eType==FTS5_VOCAB_COL || pTab->eType==FTS5_VOCAB_ROW );
      while( rc==SQLITE_OK ){

        const u8 *pPos; int nPos;   /* Position list */
        i64 iPos = 0;               /* 64-bit position read from poslist */
        int iOff = 0;               /* Current offset within position list */

        pPos = pCsr->pIter->pData;
        nPos = pCsr->pIter->nData;
        switch( pCsr->pConfig->eDetail ){

  for {set i 0} {$i < [$cmd xPhraseCount]} {incr i} {
    $cmd xPhraseForeach $i c o {
      lappend res $i.$c.$o
    }
  }

  set res

}

proc fts5_test_collist {cmd} {
  set res [list]

  for {set i 0} {$i < [$cmd xPhraseCount]} {incr i} {
    $cmd xPhraseColumnForeach $i c { lappend res $i.$c }

  for {set i 0} {$i < [$cmd xPhraseCount]} {incr i} {
    $cmd xPhraseForeach $i c o {
      lappend res $i.$c.$o
    }
  }

  #set res
  sort_poslist $res
}

proc fts5_test_collist {cmd} {
  set res [list]

  for {set i 0} {$i < [$cmd xPhraseCount]} {incr i} {
    $cmd xPhraseColumnForeach $i c { lappend res $i.$c }

foreach tok {query document} {
foreach_detail_mode $testprefix {

fts5_tclnum_register db
fts5_aux_test_functions db
















proc fts5_rowid {cmd} { expr [$cmd xColumnText -1] }
sqlite3_fts5_create_function db fts5_rowid fts5_rowid

do_execsql_test 1.$tok.0.1 "
  CREATE VIRTUAL TABLE ss USING fts5(a, b, 
       tokenize='tclnum $tok', detail=%DETAIL%);
  INSERT INTO ss(ss, rank) VALUES('rank', 'fts5_rowid()');
................................................................................
  INSERT INTO ss VALUES('eight vii eight six 3', 'i vii 1 six 9 vii');
  INSERT INTO ss VALUES('9 0 viii viii five', 'i 1 viii ix 3 4');
  INSERT INTO ss VALUES('three nine 5 nine viii four zero', 'ii i 1 5 2 viii');
  INSERT INTO ss VALUES('5 vii three 9 four', 'three five one 7 2 eight one');
}

foreach {tn expr} {


  1.1 "one"   1.2 "two"   1.3 "three"   1.4 "four"
  1.5 "v"     1.6 "vi"    1.7 "vii"     1.8 "viii"
  1.9 "9"    1.10 "0"    1.11 "1"      1.12 "2"

  2.1 "one OR two OR three OR four"
  2.2 "(one AND two) OR (three AND four)"
  2.3 "(one AND two) OR (three AND four) NOT five"
................................................................................
  if {[fts5_expr_ok $expr ss]==0} {
    do_test 1.$tok.$tn.OMITTED { list } [list]
    continue
  }

  set res [fts5_query_data $expr ss ASC ::tclnum_syn]
  do_execsql_test 1.$tok.$tn.[llength $res].asc.1 {
    SELECT rowid, fts5_test_poslist(ss), fts5_test_collist(ss) FROM ss($expr)
  } $res

  do_execsql_test 1.$tok.$tn.[llength $res].asc.2 {
    SELECT rowid, fts5_test_poslist(ss), fts5_test_collist(ss) FROM ss($expr)




    ORDER BY rank ASC
  } $res














}

}
}

finish_test

foreach tok {query document} {
foreach_detail_mode $testprefix {

fts5_tclnum_register db
fts5_aux_test_functions db

proc fts5_test_bothlist {cmd} {

  for {set i 0} {$i < [$cmd xPhraseCount]} {incr i} {
    set bFirst 1
    $cmd xPhraseColumnForeach $i c { 
      lappend CL $i.$c 
      if {$bFirst} { $cmd xPhraseForeach $i c o { lappend PL $i.$c.$o } }
      set bFirst 0
    }
  }

  list [sort_poslist $PL] $CL
}
sqlite3_fts5_create_function db fts5_test_bothlist fts5_test_bothlist

proc fts5_rowid {cmd} { expr [$cmd xColumnText -1] }
sqlite3_fts5_create_function db fts5_rowid fts5_rowid

do_execsql_test 1.$tok.0.1 "
  CREATE VIRTUAL TABLE ss USING fts5(a, b, 
       tokenize='tclnum $tok', detail=%DETAIL%);
  INSERT INTO ss(ss, rank) VALUES('rank', 'fts5_rowid()');
................................................................................
  INSERT INTO ss VALUES('eight vii eight six 3', 'i vii 1 six 9 vii');
  INSERT INTO ss VALUES('9 0 viii viii five', 'i 1 viii ix 3 4');
  INSERT INTO ss VALUES('three nine 5 nine viii four zero', 'ii i 1 5 2 viii');
  INSERT INTO ss VALUES('5 vii three 9 four', 'three five one 7 2 eight one');
}

foreach {tn expr} {
  2.1 "one OR two OR three OR four"

  1.1 "one"   1.2 "two"   1.3 "three"   1.4 "four"
  1.5 "v"     1.6 "vi"    1.7 "vii"     1.8 "viii"
  1.9 "9"    1.10 "0"    1.11 "1"      1.12 "2"

  2.1 "one OR two OR three OR four"
  2.2 "(one AND two) OR (three AND four)"
  2.3 "(one AND two) OR (three AND four) NOT five"
................................................................................
  if {[fts5_expr_ok $expr ss]==0} {
    do_test 1.$tok.$tn.OMITTED { list } [list]
    continue
  }

  set res [fts5_query_data $expr ss ASC ::tclnum_syn]
  do_execsql_test 1.$tok.$tn.[llength $res].asc.1 {
    SELECT rowid, fts5_test_poslist2(ss), fts5_test_collist(ss) FROM ss($expr)
  } $res

  do_execsql_test 1.$tok.$tn.[llength $res].asc.2 {
    SELECT rowid, fts5_test_poslist(ss), fts5_test_collist(ss) FROM ss($expr)
  } $res

  do_execsql_test 1.$tok.$tn.[llength $res].asc.2 {
    SELECT rowid, fts5_test_poslist2(ss), fts5_test_collist(ss) FROM ss($expr)
    ORDER BY rank ASC
  } $res

  set res2 [list]
  foreach {a b c} $res { lappend res2 $a $c $b }
  do_execsql_test 1.$tok.$tn.[llength $res].asc.3 {
    SELECT rowid, fts5_test_collist(ss), fts5_test_poslist2(ss) FROM ss($expr)
  } $res2

  set res3 [list]
  foreach {a b c} $res { lappend res3 $a [list $b $c] }
  do_execsql_test 1.$tok.$tn.[llength $res].asc.3 {
    SELECT rowid, fts5_test_bothlist(ss) FROM ss($expr)
  } $res3


}

}
}

finish_test