sqlite3rbu_vacuum rbu test.db state.db
  rbu step
} {SQLITE_ERROR}
do_test 2.1.2 {
  list [catch { rbu close } msg] $msg
} {1 {SQLITE_ERROR - cannot vacuum wal mode database}}









reset_db
do_execsql_test 2.2.0 {
  CREATE TABLE tx(a PRIMARY KEY, b BLOB);
  INSERT INTO tx VALUES(1, randomblob(900));
  INSERT INTO tx SELECT a+1, randomblob(900) FROM tx;
  INSERT INTO tx SELECT a+2, randomblob(900) FROM tx;
  INSERT INTO tx SELECT a+4, randomblob(900) FROM tx;

  sqlite3rbu_vacuum rbu test.db state.db
  rbu step
} {SQLITE_ERROR}
do_test 2.1.2 {
  list [catch { rbu close } msg] $msg
} {1 {SQLITE_ERROR - cannot vacuum wal mode database}}

do_test 2.1.3 {
  sqlite3rbu_vacuum rbu test.db state.db
  rbu step
} {SQLITE_ERROR}
do_test 2.1.4 {
  list [catch { rbu close_no_error } msg] $msg
} {1 SQLITE_ERROR}

reset_db
do_execsql_test 2.2.0 {
  CREATE TABLE tx(a PRIMARY KEY, b BLOB);
  INSERT INTO tx VALUES(1, randomblob(900));
  INSERT INTO tx SELECT a+1, randomblob(900) FROM tx;
  INSERT INTO tx SELECT a+2, randomblob(900) FROM tx;
  INSERT INTO tx SELECT a+4, randomblob(900) FROM tx;

    sqlite3_close(p->dbMain);
    rbuDeleteVfs(p);
    sqlite3_free(p->aBuf);
    sqlite3_free(p->aFrame);

    rbuEditErrmsg(p);
    rc = p->rc;

    *pzErrmsg = p->zErrmsg;



    sqlite3_free(p->zState);
    sqlite3_free(p);
  }else{
    rc = SQLITE_NOMEM;
    *pzErrmsg = 0;
  }
  return rc;

    sqlite3_close(p->dbMain);
    rbuDeleteVfs(p);
    sqlite3_free(p->aBuf);
    sqlite3_free(p->aFrame);

    rbuEditErrmsg(p);
    rc = p->rc;
    if( pzErrmsg ){
      *pzErrmsg = p->zErrmsg;
    }else{
      sqlite3_free(p->zErrmsg);
    }
    sqlite3_free(p->zState);
    sqlite3_free(p);
  }else{
    rc = SQLITE_NOMEM;
    *pzErrmsg = 0;
  }
  return rc;

**
** If the RBU update has been completely applied, mark the RBU database
** as fully applied. Otherwise, assuming no error has occurred, save the
** current state of the RBU update appliation to the RBU database.
**
** If an error has already occurred as part of an sqlite3rbu_step()
** or sqlite3rbu_open() call, or if one occurs within this function, an
** SQLite error code is returned. Additionally, *pzErrmsg may be set to
** point to a buffer containing a utf-8 formatted English language error
** message. It is the responsibility of the caller to eventually free any 
** such buffer using sqlite3_free().
**
** Otherwise, if no error occurs, this function returns SQLITE_OK if the
** update has been partially applied, or SQLITE_DONE if it has been 
** completely applied.
*/
int sqlite3rbu_close(sqlite3rbu *pRbu, char **pzErrmsg);

**
** If the RBU update has been completely applied, mark the RBU database
** as fully applied. Otherwise, assuming no error has occurred, save the
** current state of the RBU update appliation to the RBU database.
**
** If an error has already occurred as part of an sqlite3rbu_step()
** or sqlite3rbu_open() call, or if one occurs within this function, an
** SQLite error code is returned. Additionally, if pzErrmsg is not NULL,
** *pzErrmsg may be set to point to a buffer containing a utf-8 formatted
** English language error message. It is the responsibility of the caller to
** eventually free any such buffer using sqlite3_free().
**
** Otherwise, if no error occurs, this function returns SQLITE_OK if the
** update has been partially applied, or SQLITE_DONE if it has been 
** completely applied.
*/
int sqlite3rbu_close(sqlite3rbu *pRbu, char **pzErrmsg);

    {"create_rbu_delta", 2, ""},  /* 2 */
    {"savestate", 2, ""},         /* 3 */
    {"dbMain_eval", 3, "SQL"},    /* 4 */
    {"bp_progress", 2, ""},       /* 5 */
    {"db", 3, "RBU"},             /* 6 */
    {"state", 2, ""},             /* 7 */
    {"progress", 2, ""},          /* 8 */

    {0,0,0}
  };
  int iCmd;

  if( objc<2 ){
    Tcl_WrongNumArgs(interp, 1, objv, "METHOD");
    return TCL_ERROR;
................................................................................
  switch( iCmd ){
    case 0: /* step */ {
      int rc = sqlite3rbu_step(pRbu);
      Tcl_SetObjResult(interp, Tcl_NewStringObj(sqlite3ErrName(rc), -1));
      break;
    }


    case 1: /* close */ {
      char *zErrmsg = 0;
      int rc;
      Tcl_DeleteCommand(interp, Tcl_GetString(objv[0]));

      rc = sqlite3rbu_close(pRbu, &zErrmsg);



      if( rc==SQLITE_OK || rc==SQLITE_DONE ){
        Tcl_SetObjResult(interp, Tcl_NewStringObj(sqlite3ErrName(rc), -1));
        assert( zErrmsg==0 );
      }else{
        Tcl_SetObjResult(interp, Tcl_NewStringObj(sqlite3ErrName(rc), -1));
        if( zErrmsg ){
          Tcl_AppendResult(interp, " - ", zErrmsg, 0);

    {"create_rbu_delta", 2, ""},  /* 2 */
    {"savestate", 2, ""},         /* 3 */
    {"dbMain_eval", 3, "SQL"},    /* 4 */
    {"bp_progress", 2, ""},       /* 5 */
    {"db", 3, "RBU"},             /* 6 */
    {"state", 2, ""},             /* 7 */
    {"progress", 2, ""},          /* 8 */
    {"close_no_error", 2, ""},    /* 9 */
    {0,0,0}
  };
  int iCmd;

  if( objc<2 ){
    Tcl_WrongNumArgs(interp, 1, objv, "METHOD");
    return TCL_ERROR;
................................................................................
  switch( iCmd ){
    case 0: /* step */ {
      int rc = sqlite3rbu_step(pRbu);
      Tcl_SetObjResult(interp, Tcl_NewStringObj(sqlite3ErrName(rc), -1));
      break;
    }

    case 9: /* close_no_error */ 
    case 1: /* close */ {
      char *zErrmsg = 0;
      int rc;
      Tcl_DeleteCommand(interp, Tcl_GetString(objv[0]));
      if( iCmd==1 ){
        rc = sqlite3rbu_close(pRbu, &zErrmsg);
      }else{
        rc = sqlite3rbu_close(pRbu, 0);
      }
      if( rc==SQLITE_OK || rc==SQLITE_DONE ){
        Tcl_SetObjResult(interp, Tcl_NewStringObj(sqlite3ErrName(rc), -1));
        assert( zErrmsg==0 );
      }else{
        Tcl_SetObjResult(interp, Tcl_NewStringObj(sqlite3ErrName(rc), -1));
        if( zErrmsg ){
          Tcl_AppendResult(interp, " - ", zErrmsg, 0);

# Tests for the [sqldiff --changeset] command.
#
#
if {![info exists testdir]} {
  set testdir [file join [file dirname [info script]] .. .. test]
}
source $testdir/tester.tcl

set testprefix sessiondiff

set PROG [test_find_sqldiff]
db close

proc sqlesc {id} {
  set ret "'[string map {' ''} $id]'"
................................................................................
} {
  CREATE TABLE t2(a, b, c, PRIMARY KEY(b, c));
  INSERT INTO t2 VALUES(1, 2, 11);
  INSERT INTO t2 VALUES(7, 8, 9);
}

finish_test

# Tests for the [sqldiff --changeset] command.
#
#
if {![info exists testdir]} {
  set testdir [file join [file dirname [info script]] .. .. test]
}
source $testdir/tester.tcl
ifcapable !session {finish_test; return}
set testprefix sessiondiff

set PROG [test_find_sqldiff]
db close

proc sqlesc {id} {
  set ret "'[string map {' ''} $id]'"
................................................................................
} {
  CREATE TABLE t2(a, b, c, PRIMARY KEY(b, c));
  INSERT INTO t2 VALUES(1, 2, 11);
  INSERT INTO t2 VALUES(7, 8, 9);
}

finish_test

  if( pKey ){
    assert( nKey==(i64)(int)nKey );
    pIdxKey = sqlite3VdbeAllocUnpackedRecord(pCur->pKeyInfo);
    if( pIdxKey==0 ) return SQLITE_NOMEM_BKPT;
    sqlite3VdbeRecordUnpack(pCur->pKeyInfo, (int)nKey, pKey, pIdxKey);
    if( pIdxKey->nField==0 ){
      rc = SQLITE_CORRUPT_BKPT;
      goto moveto_done;
    }
  }else{
    pIdxKey = 0;
  }
  rc = sqlite3BtreeMovetoUnpacked(pCur, pIdxKey, nKey, bias, pRes);
moveto_done:
................................................................................
  }
  assert( offset <= (int)pBt->usableSize-5 );
  assert( pEType!=0 );
  *pEType = pPtrmap[offset];
  if( pPgno ) *pPgno = get4byte(&pPtrmap[offset+1]);

  sqlite3PagerUnref(pDbPage);
  if( *pEType<1 || *pEType>5 ) return SQLITE_CORRUPT_BKPT;
  return SQLITE_OK;
}

#else /* if defined SQLITE_OMIT_AUTOVACUUM */
  #define ptrmapPut(w,x,y,z,rc)
  #define ptrmapGet(w,x,y,z) SQLITE_OK
  #define ptrmapPutOvflPtr(x, y, rc)
................................................................................
      if( 0==iFree2 || (data[iFree2]==0 && data[iFree2+1]==0) ){
        u8 *pEnd = &data[cellOffset + nCell*2];
        u8 *pAddr;
        int sz2 = 0;
        int sz = get2byte(&data[iFree+2]);
        int top = get2byte(&data[hdr+5]);
        if( iFree2 ){
          if( iFree+sz>iFree2 ) return SQLITE_CORRUPT_BKPT;
          sz2 = get2byte(&data[iFree2+2]);
          assert( iFree+sz+sz2+iFree2-(iFree+sz) <= usableSize );
          memmove(&data[iFree+sz+sz2], &data[iFree+sz], iFree2-(iFree+sz));
          sz += sz2;
        }
        cbrk = top+sz;
        assert( cbrk+(iFree-top) <= usableSize );
................................................................................
    pc = get2byte(pAddr);
    testcase( pc==iCellFirst );
    testcase( pc==iCellLast );
    /* These conditions have already been verified in btreeInitPage()
    ** if PRAGMA cell_size_check=ON.
    */
    if( pc<iCellFirst || pc>iCellLast ){
      return SQLITE_CORRUPT_BKPT;
    }
    assert( pc>=iCellFirst && pc<=iCellLast );
    size = pPage->xCellSize(pPage, &src[pc]);
    cbrk -= size;
    if( cbrk<iCellFirst || pc+size>usableSize ){
      return SQLITE_CORRUPT_BKPT;
    }
    assert( cbrk+size<=usableSize && cbrk>=iCellFirst );
    testcase( cbrk+size==usableSize );
    testcase( pc+size==usableSize );
    put2byte(pAddr, cbrk);
    if( temp==0 ){
      int x;
................................................................................
    }
    memcpy(&data[cbrk], &src[pc], size);
  }
  data[hdr+7] = 0;

 defragment_out:
  if( data[hdr+7]+cbrk-iCellFirst!=pPage->nFree ){
    return SQLITE_CORRUPT_BKPT;
  }
  assert( cbrk>=iCellFirst );
  put2byte(&data[hdr+5], cbrk);
  data[hdr+1] = 0;
  data[hdr+2] = 0;
  memset(&data[iCellFirst], 0, cbrk-iCellFirst);
  assert( sqlite3PagerIswriteable(pPage->pDbPage) );
................................................................................

  assert( pc>0 );
  do{
    int size;            /* Size of the free slot */
    /* EVIDENCE-OF: R-06866-39125 Freeblocks are always connected in order of
    ** increasing offset. */
    if( pc>usableSize-4 || pc<iAddr+4 ){
      *pRc = SQLITE_CORRUPT_BKPT;
      return 0;
    }
    /* EVIDENCE-OF: R-22710-53328 The third and fourth bytes of each
    ** freeblock form a big-endian integer which is the size of the freeblock
    ** in bytes, including the 4-byte header. */
    size = get2byte(&aData[pc+2]);
    if( (x = size - nByte)>=0 ){
      testcase( x==4 );
      testcase( x==3 );
      if( pc < pPg->cellOffset+2*pPg->nCell || size+pc > usableSize ){
        *pRc = SQLITE_CORRUPT_BKPT;
        return 0;
      }else if( x<4 ){
        /* EVIDENCE-OF: R-11498-58022 In a well-formed b-tree page, the total
        ** number of bytes in fragments may not exceed 60. */
        if( aData[hdr+7]>57 ) return 0;

        /* Remove the slot from the free-list. Update the number of
................................................................................
  ** integer, so a value of 0 is used in its place. */
  top = get2byte(&data[hdr+5]);
  assert( top<=(int)pPage->pBt->usableSize ); /* Prevent by getAndInitPage() */
  if( gap>top ){
    if( top==0 && pPage->pBt->usableSize==65536 ){
      top = 65536;
    }else{
      return SQLITE_CORRUPT_BKPT;
    }
  }

  /* If there is enough space between gap and top for one more cell pointer
  ** array entry offset, and if the freelist is not empty, then search the
  ** freelist looking for a free slot big enough to satisfy the request.
  */
................................................................................
  iPtr = hdr + 1;
  if( data[iPtr+1]==0 && data[iPtr]==0 ){
    iFreeBlk = 0;  /* Shortcut for the case when the freelist is empty */
  }else{
    while( (iFreeBlk = get2byte(&data[iPtr]))<iStart ){
      if( iFreeBlk<iPtr+4 ){
        if( iFreeBlk==0 ) break;
        return SQLITE_CORRUPT_BKPT;
      }
      iPtr = iFreeBlk;
    }
    if( iFreeBlk>iLast ) return SQLITE_CORRUPT_BKPT;
    assert( iFreeBlk>iPtr || iFreeBlk==0 );
  
    /* At this point:
    **    iFreeBlk:   First freeblock after iStart, or zero if none
    **    iPtr:       The address of a pointer to iFreeBlk
    **
    ** Check to see if iFreeBlk should be coalesced onto the end of iStart.
    */
    if( iFreeBlk && iEnd+3>=iFreeBlk ){
      nFrag = iFreeBlk - iEnd;
      if( iEnd>iFreeBlk ) return SQLITE_CORRUPT_BKPT;
      iEnd = iFreeBlk + get2byte(&data[iFreeBlk+2]);
      if( iEnd > pPage->pBt->usableSize ) return SQLITE_CORRUPT_BKPT;


      iSize = iEnd - iStart;
      iFreeBlk = get2byte(&data[iFreeBlk]);
    }
  
    /* If iPtr is another freeblock (that is, if iPtr is not the freelist
    ** pointer in the page header) then check to see if iStart should be
    ** coalesced onto the end of iPtr.
    */
    if( iPtr>hdr+1 ){
      int iPtrEnd = iPtr + get2byte(&data[iPtr+2]);
      if( iPtrEnd+3>=iStart ){
        if( iPtrEnd>iStart ) return SQLITE_CORRUPT_BKPT;
        nFrag += iStart - iPtrEnd;
        iSize = iEnd - iPtr;
        iStart = iPtr;
      }
    }
    if( nFrag>data[hdr+7] ) return SQLITE_CORRUPT_BKPT;
    data[hdr+7] -= nFrag;
  }
  if( iStart==get2byte(&data[hdr+5]) ){
    /* The new freeblock is at the beginning of the cell content area,
    ** so just extend the cell content area rather than create another
    ** freelist entry */
    if( iPtr!=hdr+1 ) return SQLITE_CORRUPT_BKPT;
    put2byte(&data[hdr+1], iFreeBlk);
    put2byte(&data[hdr+5], iEnd);
  }else{
    /* Insert the new freeblock into the freelist */
    put2byte(&data[iPtr], iStart);
    put2byte(&data[iStart], iFreeBlk);
    put2byte(&data[iStart+2], iSize);
................................................................................
    pPage->intKeyLeaf = 0;
    pPage->xParseCell = btreeParseCellPtrIndex;
    pPage->maxLocal = pBt->maxLocal;
    pPage->minLocal = pBt->minLocal;
  }else{
    /* EVIDENCE-OF: R-47608-56469 Any other value for the b-tree page type is
    ** an error. */
    return SQLITE_CORRUPT_BKPT;
  }
  pPage->max1bytePayload = pBt->max1bytePayload;
  return SQLITE_OK;
}

/*
** Initialize the auxiliary information for a disk block.
................................................................................
  assert( pPage->isInit==0 );

  pBt = pPage->pBt;
  hdr = pPage->hdrOffset;
  data = pPage->aData;
  /* EVIDENCE-OF: R-28594-02890 The one-byte flag at offset 0 indicating
  ** the b-tree page type. */
  if( decodeFlags(pPage, data[hdr]) ) return SQLITE_CORRUPT_BKPT;


  assert( pBt->pageSize>=512 && pBt->pageSize<=65536 );
  pPage->maskPage = (u16)(pBt->pageSize - 1);
  pPage->nOverflow = 0;
  usableSize = pBt->usableSize;
  pPage->cellOffset = cellOffset = hdr + 8 + pPage->childPtrSize;
  pPage->aDataEnd = &data[usableSize];
  pPage->aCellIdx = &data[cellOffset];
................................................................................
  ** interpreted as 65536. */
  top = get2byteNotZero(&data[hdr+5]);
  /* EVIDENCE-OF: R-37002-32774 The two-byte integer at offset 3 gives the
  ** number of cells on the page. */
  pPage->nCell = get2byte(&data[hdr+3]);
  if( pPage->nCell>MX_CELL(pBt) ){
    /* To many cells for a single page.  The page must be corrupt */
    return SQLITE_CORRUPT_BKPT;
  }
  testcase( pPage->nCell==MX_CELL(pBt) );
  /* EVIDENCE-OF: R-24089-57979 If a page contains no cells (which is only
  ** possible for a root page of a table that contains no rows) then the
  ** offset to the cell content area will equal the page size minus the
  ** bytes of reserved space. */
  assert( pPage->nCell>0 || top==usableSize || CORRUPT_DB );
................................................................................

    if( !pPage->leaf ) iCellLast--;
    for(i=0; i<pPage->nCell; i++){
      pc = get2byteAligned(&data[cellOffset+i*2]);
      testcase( pc==iCellFirst );
      testcase( pc==iCellLast );
      if( pc<iCellFirst || pc>iCellLast ){
        return SQLITE_CORRUPT_BKPT;
      }
      sz = pPage->xCellSize(pPage, &data[pc]);
      testcase( pc+sz==usableSize );
      if( pc+sz>usableSize ){
        return SQLITE_CORRUPT_BKPT;
      }
    }
    if( !pPage->leaf ) iCellLast++;
  }  

  /* Compute the total free space on the page
  ** EVIDENCE-OF: R-23588-34450 The two-byte integer at offset 1 gives the
................................................................................
  nFree = data[hdr+7] + top;  /* Init nFree to non-freeblock free space */
  if( pc>0 ){
    u32 next, size;
    if( pc<iCellFirst ){
      /* EVIDENCE-OF: R-55530-52930 In a well-formed b-tree page, there will
      ** always be at least one cell before the first freeblock.
      */
      return SQLITE_CORRUPT_BKPT; 
    }
    while( 1 ){
      if( pc>iCellLast ){
        return SQLITE_CORRUPT_BKPT; /* Freeblock off the end of the page */

      }
      next = get2byte(&data[pc]);
      size = get2byte(&data[pc+2]);
      nFree = nFree + size;
      if( next<=pc+size+3 ) break;
      pc = next;
    }
    if( next>0 ){
      return SQLITE_CORRUPT_BKPT;  /* Freeblock not in ascending order */

    }
    if( pc+size>(unsigned int)usableSize ){
      return SQLITE_CORRUPT_BKPT;  /* Last freeblock extends past page end */

    }
  }

  /* At this point, nFree contains the sum of the offset to the start
  ** of the cell-content area plus the number of free bytes within
  ** the cell-content area. If this is greater than the usable-size
  ** of the page, then the page must be corrupted. This check also
  ** serves to verify that the offset to the start of the cell-content
  ** area, according to the page header, lies within the page.
  */
  if( nFree>usableSize ){
    return SQLITE_CORRUPT_BKPT; 
  }
  pPage->nFree = (u16)(nFree - iCellFirst);
  pPage->isInit = 1;
  return SQLITE_OK;
}

/*
................................................................................
  }
  assert( (*ppPage)->pgno==pgno );
  assert( (*ppPage)->aData==sqlite3PagerGetData(pDbPage) );

  /* If obtaining a child page for a cursor, we must verify that the page is
  ** compatible with the root page. */
  if( pCur && ((*ppPage)->nCell<1 || (*ppPage)->intKey!=pCur->curIntKey) ){
    rc = SQLITE_CORRUPT_BKPT;
    releasePage(*ppPage);
    goto getAndInitPage_error;
  }
  return SQLITE_OK;

getAndInitPage_error:
  if( pCur ) pCur->iPage--;
................................................................................
*/
static int modifyPagePointer(MemPage *pPage, Pgno iFrom, Pgno iTo, u8 eType){
  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  assert( sqlite3PagerIswriteable(pPage->pDbPage) );
  if( eType==PTRMAP_OVERFLOW2 ){
    /* The pointer is always the first 4 bytes of the page in this case.  */
    if( get4byte(pPage->aData)!=iFrom ){
      return SQLITE_CORRUPT_BKPT;
    }
    put4byte(pPage->aData, iTo);
  }else{
    int i;
    int nCell;
    int rc;

................................................................................
    for(i=0; i<nCell; i++){
      u8 *pCell = findCell(pPage, i);
      if( eType==PTRMAP_OVERFLOW1 ){
        CellInfo info;
        pPage->xParseCell(pPage, pCell, &info);
        if( info.nLocal<info.nPayload ){
          if( pCell+info.nSize > pPage->aData+pPage->pBt->usableSize ){
            return SQLITE_CORRUPT_BKPT;
          }
          if( iFrom==get4byte(pCell+info.nSize-4) ){
            put4byte(pCell+info.nSize-4, iTo);
            break;
          }
        }
      }else{
................................................................................
        }
      }
    }
  
    if( i==nCell ){
      if( eType!=PTRMAP_BTREE || 
          get4byte(&pPage->aData[pPage->hdrOffset+8])!=iFrom ){
        return SQLITE_CORRUPT_BKPT;
      }
      put4byte(&pPage->aData[pPage->hdrOffset+8], iTo);
    }
  }
  return SQLITE_OK;
}

................................................................................
  assert( aPayload > pPage->aData );
  if( (uptr)(aPayload - pPage->aData) > (pBt->usableSize - pCur->info.nLocal) ){
    /* Trying to read or write past the end of the data is an error.  The
    ** conditional above is really:
    **    &aPayload[pCur->info.nLocal] > &pPage->aData[pBt->usableSize]
    ** but is recast into its current form to avoid integer overflow problems
    */
    return SQLITE_CORRUPT_BKPT;
  }

  /* Check if data must be read/written to/from the btree page itself. */
  if( offset<pCur->info.nLocal ){
    int a = amt;
    if( a+offset>pCur->info.nLocal ){
      a = pCur->info.nLocal - offset;
................................................................................
      }
      if( rc ) break;
      iIdx++;
    }
  }

  if( rc==SQLITE_OK && amt>0 ){
    return SQLITE_CORRUPT_BKPT; /* Overflow chain ends prematurely */

  }
  return rc;
}

/*
** Read part of the payload for the row at which that cursor pCur is currently
** pointing.  "amt" bytes will be transferred into pBuf[].  The transfer
................................................................................
  ** Earlier versions of SQLite assumed that this test could not fail
  ** if the root page was already loaded when this function was called (i.e.
  ** if pCur->iPage>=0). But this is not so if the database is corrupted 
  ** in such a way that page pRoot is linked into a second b-tree table 
  ** (or the freelist).  */
  assert( pRoot->intKey==1 || pRoot->intKey==0 );
  if( pRoot->isInit==0 || (pCur->pKeyInfo==0)!=pRoot->intKey ){
    return SQLITE_CORRUPT_BKPT;
  }

skip_init:  
  pCur->ix = 0;
  pCur->info.nSize = 0;
  pCur->curFlags &= ~(BTCF_AtLast|BTCF_ValidNKey|BTCF_ValidOvfl);

................................................................................
    pCur->ix = (u16)idx;
    if( xRecordCompare==0 ){
      for(;;){
        i64 nCellKey;
        pCell = findCellPastPtr(pPage, idx);
        if( pPage->intKeyLeaf ){
          while( 0x80 <= *(pCell++) ){
            if( pCell>=pPage->aDataEnd ) return SQLITE_CORRUPT_BKPT;


          }
        }
        getVarint(pCell, (u64*)&nCellKey);
        if( nCellKey<intKey ){
          lwr = idx+1;
          if( lwr>upr ){ c = -1; break; }
        }else if( nCellKey>intKey ){
................................................................................
          pPage->xParseCell(pPage, pCellBody, &pCur->info);
          nCell = (int)pCur->info.nKey;
          testcase( nCell<0 );   /* True if key size is 2^32 or more */
          testcase( nCell==0 );  /* Invalid key size:  0x80 0x80 0x00 */
          testcase( nCell==1 );  /* Invalid key size:  0x80 0x80 0x01 */
          testcase( nCell==2 );  /* Minimum legal index key size */
          if( nCell<2 ){
            rc = SQLITE_CORRUPT_BKPT;
            goto moveto_finish;
          }
          pCellKey = sqlite3Malloc( nCell+18 );
          if( pCellKey==0 ){
            rc = SQLITE_NOMEM_BKPT;
            goto moveto_finish;
          }
................................................................................
        /* EVIDENCE-OF: R-59841-13798 The 4-byte big-endian integer at offset 32
        ** stores the page number of the first page of the freelist, or zero if
        ** the freelist is empty. */
        iTrunk = get4byte(&pPage1->aData[32]);
      }
      testcase( iTrunk==mxPage );
      if( iTrunk>mxPage || nSearch++ > n ){
        rc = SQLITE_CORRUPT_BKPT;
      }else{
        rc = btreeGetUnusedPage(pBt, iTrunk, &pTrunk, 0);
      }
      if( rc ){
        pTrunk = 0;
        goto end_allocate_page;
      }
................................................................................
        *pPgno = iTrunk;
        memcpy(&pPage1->aData[32], &pTrunk->aData[0], 4);
        *ppPage = pTrunk;
        pTrunk = 0;
        TRACE(("ALLOCATE: %d trunk - %d free pages left\n", *pPgno, n-1));
      }else if( k>(u32)(pBt->usableSize/4 - 2) ){
        /* Value of k is out of range.  Database corruption */
        rc = SQLITE_CORRUPT_BKPT;
        goto end_allocate_page;
#ifndef SQLITE_OMIT_AUTOVACUUM
      }else if( searchList 
            && (nearby==iTrunk || (iTrunk<nearby && eMode==BTALLOC_LE)) 
      ){
        /* The list is being searched and this trunk page is the page
        ** to allocate, regardless of whether it has leaves.
................................................................................
          /* The trunk page is required by the caller but it contains 
          ** pointers to free-list leaves. The first leaf becomes a trunk
          ** page in this case.
          */
          MemPage *pNewTrunk;
          Pgno iNewTrunk = get4byte(&pTrunk->aData[8]);
          if( iNewTrunk>mxPage ){ 
            rc = SQLITE_CORRUPT_BKPT;
            goto end_allocate_page;
          }
          testcase( iNewTrunk==mxPage );
          rc = btreeGetUnusedPage(pBt, iNewTrunk, &pNewTrunk, 0);
          if( rc!=SQLITE_OK ){
            goto end_allocate_page;
          }
................................................................................
        }else{
          closest = 0;
        }

        iPage = get4byte(&aData[8+closest*4]);
        testcase( iPage==mxPage );
        if( iPage>mxPage ){
          rc = SQLITE_CORRUPT_BKPT;
          goto end_allocate_page;
        }
        testcase( iPage==mxPage );
        if( !searchList 
         || (iPage==nearby || (iPage<nearby && eMode==BTALLOC_LE)) 
        ){
          int noContent;
................................................................................

  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  pPage->xParseCell(pPage, pCell, pInfo);
  if( pInfo->nLocal==pInfo->nPayload ){
    return SQLITE_OK;  /* No overflow pages. Return without doing anything */
  }
  if( pCell+pInfo->nSize-1 > pPage->aData+pPage->maskPage ){
    return SQLITE_CORRUPT_BKPT;  /* Cell extends past end of page */

  }
  ovflPgno = get4byte(pCell + pInfo->nSize - 4);
  assert( pBt->usableSize > 4 );
  ovflPageSize = pBt->usableSize - 4;
  nOvfl = (pInfo->nPayload - pInfo->nLocal + ovflPageSize - 1)/ovflPageSize;
  assert( nOvfl>0 || 
    (CORRUPT_DB && (pInfo->nPayload + ovflPageSize)<ovflPageSize)
................................................................................
      goto end_insert;
    }
    oldCell = findCell(pPage, idx);
    if( !pPage->leaf ){
      memcpy(newCell, oldCell, 4);
    }
    rc = clearCell(pPage, oldCell, &info);
    if( info.nSize==szNew && info.nLocal==info.nPayload ){


      /* Overwrite the old cell with the new if they are the same size.
      ** We could also try to do this if the old cell is smaller, then add
      ** the leftover space to the free list.  But experiments show that
      ** doing that is no faster then skipping this optimization and just
      ** calling dropCell() and insertCell(). */




      assert( rc==SQLITE_OK ); /* clearCell never fails when nLocal==nPayload */
      if( oldCell+szNew > pPage->aDataEnd ) return SQLITE_CORRUPT_BKPT;
      memcpy(oldCell, newCell, szNew);
      return SQLITE_OK;
    }
    dropCell(pPage, idx, info.nSize, &rc);
    if( rc ) goto end_insert;

  if( pKey ){
    assert( nKey==(i64)(int)nKey );
    pIdxKey = sqlite3VdbeAllocUnpackedRecord(pCur->pKeyInfo);
    if( pIdxKey==0 ) return SQLITE_NOMEM_BKPT;
    sqlite3VdbeRecordUnpack(pCur->pKeyInfo, (int)nKey, pKey, pIdxKey);
    if( pIdxKey->nField==0 ){
      rc = SQLITE_CORRUPT_PGNO(pCur->apPage[pCur->iPage]->pgno);
      goto moveto_done;
    }
  }else{
    pIdxKey = 0;
  }
  rc = sqlite3BtreeMovetoUnpacked(pCur, pIdxKey, nKey, bias, pRes);
moveto_done:
................................................................................
  }
  assert( offset <= (int)pBt->usableSize-5 );
  assert( pEType!=0 );
  *pEType = pPtrmap[offset];
  if( pPgno ) *pPgno = get4byte(&pPtrmap[offset+1]);

  sqlite3PagerUnref(pDbPage);
  if( *pEType<1 || *pEType>5 ) return SQLITE_CORRUPT_PGNO(iPtrmap);
  return SQLITE_OK;
}

#else /* if defined SQLITE_OMIT_AUTOVACUUM */
  #define ptrmapPut(w,x,y,z,rc)
  #define ptrmapGet(w,x,y,z) SQLITE_OK
  #define ptrmapPutOvflPtr(x, y, rc)
................................................................................
      if( 0==iFree2 || (data[iFree2]==0 && data[iFree2+1]==0) ){
        u8 *pEnd = &data[cellOffset + nCell*2];
        u8 *pAddr;
        int sz2 = 0;
        int sz = get2byte(&data[iFree+2]);
        int top = get2byte(&data[hdr+5]);
        if( iFree2 ){
          if( iFree+sz>iFree2 ) return SQLITE_CORRUPT_PGNO(pPage->pgno);
          sz2 = get2byte(&data[iFree2+2]);
          assert( iFree+sz+sz2+iFree2-(iFree+sz) <= usableSize );
          memmove(&data[iFree+sz+sz2], &data[iFree+sz], iFree2-(iFree+sz));
          sz += sz2;
        }
        cbrk = top+sz;
        assert( cbrk+(iFree-top) <= usableSize );
................................................................................
    pc = get2byte(pAddr);
    testcase( pc==iCellFirst );
    testcase( pc==iCellLast );
    /* These conditions have already been verified in btreeInitPage()
    ** if PRAGMA cell_size_check=ON.
    */
    if( pc<iCellFirst || pc>iCellLast ){
      return SQLITE_CORRUPT_PGNO(pPage->pgno);
    }
    assert( pc>=iCellFirst && pc<=iCellLast );
    size = pPage->xCellSize(pPage, &src[pc]);
    cbrk -= size;
    if( cbrk<iCellFirst || pc+size>usableSize ){
      return SQLITE_CORRUPT_PGNO(pPage->pgno);
    }
    assert( cbrk+size<=usableSize && cbrk>=iCellFirst );
    testcase( cbrk+size==usableSize );
    testcase( pc+size==usableSize );
    put2byte(pAddr, cbrk);
    if( temp==0 ){
      int x;
................................................................................
    }
    memcpy(&data[cbrk], &src[pc], size);
  }
  data[hdr+7] = 0;

 defragment_out:
  if( data[hdr+7]+cbrk-iCellFirst!=pPage->nFree ){
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }
  assert( cbrk>=iCellFirst );
  put2byte(&data[hdr+5], cbrk);
  data[hdr+1] = 0;
  data[hdr+2] = 0;
  memset(&data[iCellFirst], 0, cbrk-iCellFirst);
  assert( sqlite3PagerIswriteable(pPage->pDbPage) );
................................................................................

  assert( pc>0 );
  do{
    int size;            /* Size of the free slot */
    /* EVIDENCE-OF: R-06866-39125 Freeblocks are always connected in order of
    ** increasing offset. */
    if( pc>usableSize-4 || pc<iAddr+4 ){
      *pRc = SQLITE_CORRUPT_PGNO(pPg->pgno);
      return 0;
    }
    /* EVIDENCE-OF: R-22710-53328 The third and fourth bytes of each
    ** freeblock form a big-endian integer which is the size of the freeblock
    ** in bytes, including the 4-byte header. */
    size = get2byte(&aData[pc+2]);
    if( (x = size - nByte)>=0 ){
      testcase( x==4 );
      testcase( x==3 );
      if( pc < pPg->cellOffset+2*pPg->nCell || size+pc > usableSize ){
        *pRc = SQLITE_CORRUPT_PGNO(pPg->pgno);
        return 0;
      }else if( x<4 ){
        /* EVIDENCE-OF: R-11498-58022 In a well-formed b-tree page, the total
        ** number of bytes in fragments may not exceed 60. */
        if( aData[hdr+7]>57 ) return 0;

        /* Remove the slot from the free-list. Update the number of
................................................................................
  ** integer, so a value of 0 is used in its place. */
  top = get2byte(&data[hdr+5]);
  assert( top<=(int)pPage->pBt->usableSize ); /* Prevent by getAndInitPage() */
  if( gap>top ){
    if( top==0 && pPage->pBt->usableSize==65536 ){
      top = 65536;
    }else{
      return SQLITE_CORRUPT_PGNO(pPage->pgno);
    }
  }

  /* If there is enough space between gap and top for one more cell pointer
  ** array entry offset, and if the freelist is not empty, then search the
  ** freelist looking for a free slot big enough to satisfy the request.
  */
................................................................................
  iPtr = hdr + 1;
  if( data[iPtr+1]==0 && data[iPtr]==0 ){
    iFreeBlk = 0;  /* Shortcut for the case when the freelist is empty */
  }else{
    while( (iFreeBlk = get2byte(&data[iPtr]))<iStart ){
      if( iFreeBlk<iPtr+4 ){
        if( iFreeBlk==0 ) break;
        return SQLITE_CORRUPT_PGNO(pPage->pgno);
      }
      iPtr = iFreeBlk;
    }
    if( iFreeBlk>iLast ) return SQLITE_CORRUPT_PGNO(pPage->pgno);
    assert( iFreeBlk>iPtr || iFreeBlk==0 );
  
    /* At this point:
    **    iFreeBlk:   First freeblock after iStart, or zero if none
    **    iPtr:       The address of a pointer to iFreeBlk
    **
    ** Check to see if iFreeBlk should be coalesced onto the end of iStart.
    */
    if( iFreeBlk && iEnd+3>=iFreeBlk ){
      nFrag = iFreeBlk - iEnd;
      if( iEnd>iFreeBlk ) return SQLITE_CORRUPT_PGNO(pPage->pgno);
      iEnd = iFreeBlk + get2byte(&data[iFreeBlk+2]);
      if( iEnd > pPage->pBt->usableSize ){
        return SQLITE_CORRUPT_PGNO(pPage->pgno);
      }
      iSize = iEnd - iStart;
      iFreeBlk = get2byte(&data[iFreeBlk]);
    }
  
    /* If iPtr is another freeblock (that is, if iPtr is not the freelist
    ** pointer in the page header) then check to see if iStart should be
    ** coalesced onto the end of iPtr.
    */
    if( iPtr>hdr+1 ){
      int iPtrEnd = iPtr + get2byte(&data[iPtr+2]);
      if( iPtrEnd+3>=iStart ){
        if( iPtrEnd>iStart ) return SQLITE_CORRUPT_PGNO(pPage->pgno);
        nFrag += iStart - iPtrEnd;
        iSize = iEnd - iPtr;
        iStart = iPtr;
      }
    }
    if( nFrag>data[hdr+7] ) return SQLITE_CORRUPT_PGNO(pPage->pgno);
    data[hdr+7] -= nFrag;
  }
  if( iStart==get2byte(&data[hdr+5]) ){
    /* The new freeblock is at the beginning of the cell content area,
    ** so just extend the cell content area rather than create another
    ** freelist entry */
    if( iPtr!=hdr+1 ) return SQLITE_CORRUPT_PGNO(pPage->pgno);
    put2byte(&data[hdr+1], iFreeBlk);
    put2byte(&data[hdr+5], iEnd);
  }else{
    /* Insert the new freeblock into the freelist */
    put2byte(&data[iPtr], iStart);
    put2byte(&data[iStart], iFreeBlk);
    put2byte(&data[iStart+2], iSize);
................................................................................
    pPage->intKeyLeaf = 0;
    pPage->xParseCell = btreeParseCellPtrIndex;
    pPage->maxLocal = pBt->maxLocal;
    pPage->minLocal = pBt->minLocal;
  }else{
    /* EVIDENCE-OF: R-47608-56469 Any other value for the b-tree page type is
    ** an error. */
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }
  pPage->max1bytePayload = pBt->max1bytePayload;
  return SQLITE_OK;
}

/*
** Initialize the auxiliary information for a disk block.
................................................................................
  assert( pPage->isInit==0 );

  pBt = pPage->pBt;
  hdr = pPage->hdrOffset;
  data = pPage->aData;
  /* EVIDENCE-OF: R-28594-02890 The one-byte flag at offset 0 indicating
  ** the b-tree page type. */
  if( decodeFlags(pPage, data[hdr]) ){
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }
  assert( pBt->pageSize>=512 && pBt->pageSize<=65536 );
  pPage->maskPage = (u16)(pBt->pageSize - 1);
  pPage->nOverflow = 0;
  usableSize = pBt->usableSize;
  pPage->cellOffset = cellOffset = hdr + 8 + pPage->childPtrSize;
  pPage->aDataEnd = &data[usableSize];
  pPage->aCellIdx = &data[cellOffset];
................................................................................
  ** interpreted as 65536. */
  top = get2byteNotZero(&data[hdr+5]);
  /* EVIDENCE-OF: R-37002-32774 The two-byte integer at offset 3 gives the
  ** number of cells on the page. */
  pPage->nCell = get2byte(&data[hdr+3]);
  if( pPage->nCell>MX_CELL(pBt) ){
    /* To many cells for a single page.  The page must be corrupt */
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }
  testcase( pPage->nCell==MX_CELL(pBt) );
  /* EVIDENCE-OF: R-24089-57979 If a page contains no cells (which is only
  ** possible for a root page of a table that contains no rows) then the
  ** offset to the cell content area will equal the page size minus the
  ** bytes of reserved space. */
  assert( pPage->nCell>0 || top==usableSize || CORRUPT_DB );
................................................................................

    if( !pPage->leaf ) iCellLast--;
    for(i=0; i<pPage->nCell; i++){
      pc = get2byteAligned(&data[cellOffset+i*2]);
      testcase( pc==iCellFirst );
      testcase( pc==iCellLast );
      if( pc<iCellFirst || pc>iCellLast ){
        return SQLITE_CORRUPT_PGNO(pPage->pgno);
      }
      sz = pPage->xCellSize(pPage, &data[pc]);
      testcase( pc+sz==usableSize );
      if( pc+sz>usableSize ){
        return SQLITE_CORRUPT_PGNO(pPage->pgno);
      }
    }
    if( !pPage->leaf ) iCellLast++;
  }  

  /* Compute the total free space on the page
  ** EVIDENCE-OF: R-23588-34450 The two-byte integer at offset 1 gives the
................................................................................
  nFree = data[hdr+7] + top;  /* Init nFree to non-freeblock free space */
  if( pc>0 ){
    u32 next, size;
    if( pc<iCellFirst ){
      /* EVIDENCE-OF: R-55530-52930 In a well-formed b-tree page, there will
      ** always be at least one cell before the first freeblock.
      */
      return SQLITE_CORRUPT_PGNO(pPage->pgno); 
    }
    while( 1 ){
      if( pc>iCellLast ){
        /* Freeblock off the end of the page */
        return SQLITE_CORRUPT_PGNO(pPage->pgno);
      }
      next = get2byte(&data[pc]);
      size = get2byte(&data[pc+2]);
      nFree = nFree + size;
      if( next<=pc+size+3 ) break;
      pc = next;
    }
    if( next>0 ){
      /* Freeblock not in ascending order */
      return SQLITE_CORRUPT_PGNO(pPage->pgno);
    }
    if( pc+size>(unsigned int)usableSize ){
      /* Last freeblock extends past page end */
      return SQLITE_CORRUPT_PGNO(pPage->pgno);
    }
  }

  /* At this point, nFree contains the sum of the offset to the start
  ** of the cell-content area plus the number of free bytes within
  ** the cell-content area. If this is greater than the usable-size
  ** of the page, then the page must be corrupted. This check also
  ** serves to verify that the offset to the start of the cell-content
  ** area, according to the page header, lies within the page.
  */
  if( nFree>usableSize ){
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }
  pPage->nFree = (u16)(nFree - iCellFirst);
  pPage->isInit = 1;
  return SQLITE_OK;
}

/*
................................................................................
  }
  assert( (*ppPage)->pgno==pgno );
  assert( (*ppPage)->aData==sqlite3PagerGetData(pDbPage) );

  /* If obtaining a child page for a cursor, we must verify that the page is
  ** compatible with the root page. */
  if( pCur && ((*ppPage)->nCell<1 || (*ppPage)->intKey!=pCur->curIntKey) ){
    rc = SQLITE_CORRUPT_PGNO(pgno);
    releasePage(*ppPage);
    goto getAndInitPage_error;
  }
  return SQLITE_OK;

getAndInitPage_error:
  if( pCur ) pCur->iPage--;
................................................................................
*/
static int modifyPagePointer(MemPage *pPage, Pgno iFrom, Pgno iTo, u8 eType){
  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  assert( sqlite3PagerIswriteable(pPage->pDbPage) );
  if( eType==PTRMAP_OVERFLOW2 ){
    /* The pointer is always the first 4 bytes of the page in this case.  */
    if( get4byte(pPage->aData)!=iFrom ){
      return SQLITE_CORRUPT_PGNO(pPage->pgno);
    }
    put4byte(pPage->aData, iTo);
  }else{
    int i;
    int nCell;
    int rc;

................................................................................
    for(i=0; i<nCell; i++){
      u8 *pCell = findCell(pPage, i);
      if( eType==PTRMAP_OVERFLOW1 ){
        CellInfo info;
        pPage->xParseCell(pPage, pCell, &info);
        if( info.nLocal<info.nPayload ){
          if( pCell+info.nSize > pPage->aData+pPage->pBt->usableSize ){
            return SQLITE_CORRUPT_PGNO(pPage->pgno);
          }
          if( iFrom==get4byte(pCell+info.nSize-4) ){
            put4byte(pCell+info.nSize-4, iTo);
            break;
          }
        }
      }else{
................................................................................
        }
      }
    }
  
    if( i==nCell ){
      if( eType!=PTRMAP_BTREE || 
          get4byte(&pPage->aData[pPage->hdrOffset+8])!=iFrom ){
        return SQLITE_CORRUPT_PGNO(pPage->pgno);
      }
      put4byte(&pPage->aData[pPage->hdrOffset+8], iTo);
    }
  }
  return SQLITE_OK;
}

................................................................................
  assert( aPayload > pPage->aData );
  if( (uptr)(aPayload - pPage->aData) > (pBt->usableSize - pCur->info.nLocal) ){
    /* Trying to read or write past the end of the data is an error.  The
    ** conditional above is really:
    **    &aPayload[pCur->info.nLocal] > &pPage->aData[pBt->usableSize]
    ** but is recast into its current form to avoid integer overflow problems
    */
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }

  /* Check if data must be read/written to/from the btree page itself. */
  if( offset<pCur->info.nLocal ){
    int a = amt;
    if( a+offset>pCur->info.nLocal ){
      a = pCur->info.nLocal - offset;
................................................................................
      }
      if( rc ) break;
      iIdx++;
    }
  }

  if( rc==SQLITE_OK && amt>0 ){
    /* Overflow chain ends prematurely */
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }
  return rc;
}

/*
** Read part of the payload for the row at which that cursor pCur is currently
** pointing.  "amt" bytes will be transferred into pBuf[].  The transfer
................................................................................
  ** Earlier versions of SQLite assumed that this test could not fail
  ** if the root page was already loaded when this function was called (i.e.
  ** if pCur->iPage>=0). But this is not so if the database is corrupted 
  ** in such a way that page pRoot is linked into a second b-tree table 
  ** (or the freelist).  */
  assert( pRoot->intKey==1 || pRoot->intKey==0 );
  if( pRoot->isInit==0 || (pCur->pKeyInfo==0)!=pRoot->intKey ){
    return SQLITE_CORRUPT_PGNO(pCur->apPage[pCur->iPage]->pgno);
  }

skip_init:  
  pCur->ix = 0;
  pCur->info.nSize = 0;
  pCur->curFlags &= ~(BTCF_AtLast|BTCF_ValidNKey|BTCF_ValidOvfl);

................................................................................
    pCur->ix = (u16)idx;
    if( xRecordCompare==0 ){
      for(;;){
        i64 nCellKey;
        pCell = findCellPastPtr(pPage, idx);
        if( pPage->intKeyLeaf ){
          while( 0x80 <= *(pCell++) ){
            if( pCell>=pPage->aDataEnd ){
              return SQLITE_CORRUPT_PGNO(pPage->pgno);
            }
          }
        }
        getVarint(pCell, (u64*)&nCellKey);
        if( nCellKey<intKey ){
          lwr = idx+1;
          if( lwr>upr ){ c = -1; break; }
        }else if( nCellKey>intKey ){
................................................................................
          pPage->xParseCell(pPage, pCellBody, &pCur->info);
          nCell = (int)pCur->info.nKey;
          testcase( nCell<0 );   /* True if key size is 2^32 or more */
          testcase( nCell==0 );  /* Invalid key size:  0x80 0x80 0x00 */
          testcase( nCell==1 );  /* Invalid key size:  0x80 0x80 0x01 */
          testcase( nCell==2 );  /* Minimum legal index key size */
          if( nCell<2 ){
            rc = SQLITE_CORRUPT_PGNO(pPage->pgno);
            goto moveto_finish;
          }
          pCellKey = sqlite3Malloc( nCell+18 );
          if( pCellKey==0 ){
            rc = SQLITE_NOMEM_BKPT;
            goto moveto_finish;
          }
................................................................................
        /* EVIDENCE-OF: R-59841-13798 The 4-byte big-endian integer at offset 32
        ** stores the page number of the first page of the freelist, or zero if
        ** the freelist is empty. */
        iTrunk = get4byte(&pPage1->aData[32]);
      }
      testcase( iTrunk==mxPage );
      if( iTrunk>mxPage || nSearch++ > n ){
        rc = SQLITE_CORRUPT_PGNO(pPrevTrunk ? pPrevTrunk->pgno : 1);
      }else{
        rc = btreeGetUnusedPage(pBt, iTrunk, &pTrunk, 0);
      }
      if( rc ){
        pTrunk = 0;
        goto end_allocate_page;
      }
................................................................................
        *pPgno = iTrunk;
        memcpy(&pPage1->aData[32], &pTrunk->aData[0], 4);
        *ppPage = pTrunk;
        pTrunk = 0;
        TRACE(("ALLOCATE: %d trunk - %d free pages left\n", *pPgno, n-1));
      }else if( k>(u32)(pBt->usableSize/4 - 2) ){
        /* Value of k is out of range.  Database corruption */
        rc = SQLITE_CORRUPT_PGNO(iTrunk);
        goto end_allocate_page;
#ifndef SQLITE_OMIT_AUTOVACUUM
      }else if( searchList 
            && (nearby==iTrunk || (iTrunk<nearby && eMode==BTALLOC_LE)) 
      ){
        /* The list is being searched and this trunk page is the page
        ** to allocate, regardless of whether it has leaves.
................................................................................
          /* The trunk page is required by the caller but it contains 
          ** pointers to free-list leaves. The first leaf becomes a trunk
          ** page in this case.
          */
          MemPage *pNewTrunk;
          Pgno iNewTrunk = get4byte(&pTrunk->aData[8]);
          if( iNewTrunk>mxPage ){ 
            rc = SQLITE_CORRUPT_PGNO(iTrunk);
            goto end_allocate_page;
          }
          testcase( iNewTrunk==mxPage );
          rc = btreeGetUnusedPage(pBt, iNewTrunk, &pNewTrunk, 0);
          if( rc!=SQLITE_OK ){
            goto end_allocate_page;
          }
................................................................................
        }else{
          closest = 0;
        }

        iPage = get4byte(&aData[8+closest*4]);
        testcase( iPage==mxPage );
        if( iPage>mxPage ){
          rc = SQLITE_CORRUPT_PGNO(iTrunk);
          goto end_allocate_page;
        }
        testcase( iPage==mxPage );
        if( !searchList 
         || (iPage==nearby || (iPage<nearby && eMode==BTALLOC_LE)) 
        ){
          int noContent;
................................................................................

  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  pPage->xParseCell(pPage, pCell, pInfo);
  if( pInfo->nLocal==pInfo->nPayload ){
    return SQLITE_OK;  /* No overflow pages. Return without doing anything */
  }
  if( pCell+pInfo->nSize-1 > pPage->aData+pPage->maskPage ){
    /* Cell extends past end of page */
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }
  ovflPgno = get4byte(pCell + pInfo->nSize - 4);
  assert( pBt->usableSize > 4 );
  ovflPageSize = pBt->usableSize - 4;
  nOvfl = (pInfo->nPayload - pInfo->nLocal + ovflPageSize - 1)/ovflPageSize;
  assert( nOvfl>0 || 
    (CORRUPT_DB && (pInfo->nPayload + ovflPageSize)<ovflPageSize)
................................................................................
      goto end_insert;
    }
    oldCell = findCell(pPage, idx);
    if( !pPage->leaf ){
      memcpy(newCell, oldCell, 4);
    }
    rc = clearCell(pPage, oldCell, &info);
    if( info.nSize==szNew && info.nLocal==info.nPayload 
     && (!ISAUTOVACUUM || szNew<pPage->minLocal)
    ){
      /* Overwrite the old cell with the new if they are the same size.
      ** We could also try to do this if the old cell is smaller, then add
      ** the leftover space to the free list.  But experiments show that
      ** doing that is no faster then skipping this optimization and just
      ** calling dropCell() and insertCell(). 
      **
      ** This optimization cannot be used on an autovacuum database if the
      ** new entry uses overflow pages, as the insertCell() call below is
      ** necessary to add the PTRMAP_OVERFLOW1 pointer-map entry.  */
      assert( rc==SQLITE_OK ); /* clearCell never fails when nLocal==nPayload */
      if( oldCell+szNew > pPage->aDataEnd ) return SQLITE_CORRUPT_BKPT;
      memcpy(oldCell, newCell, szNew);
      return SQLITE_OK;
    }
    dropCell(pPage, idx, info.nSize, &rc);
    if( rc ) goto end_insert;

    pParse->nErr++;
    goto begin_table_error;
  }
  pTable->zName = zName;
  pTable->iPKey = -1;
  pTable->pSchema = db->aDb[iDb].pSchema;
  pTable->nTabRef = 1;



  pTable->nRowLogEst = 200; assert( 200==sqlite3LogEst(1048576) );

  assert( pParse->pNewTable==0 );
  pParse->pNewTable = pTable;

  /* If this is the magic sqlite_sequence table used by autoincrement,
  ** then record a pointer to this table in the main database structure
  ** so that INSERT can find the table easily.
  */

    pParse->nErr++;
    goto begin_table_error;
  }
  pTable->zName = zName;
  pTable->iPKey = -1;
  pTable->pSchema = db->aDb[iDb].pSchema;
  pTable->nTabRef = 1;
#ifdef SQLITE_DEFAULT_ROWEST
  pTable->nRowLogEst = sqlite3LogEst(SQLITE_DEFAULT_ROWEST);
#else
  pTable->nRowLogEst = 200; assert( 200==sqlite3LogEst(1048576) );
#endif
  assert( pParse->pNewTable==0 );
  pParse->pNewTable = pTable;

  /* If this is the magic sqlite_sequence table used by autoincrement,
  ** then record a pointer to this table in the main database structure
  ** so that INSERT can find the table easily.
  */

  int tmask;                  /* Mask of trigger times */
#endif

  db = pParse->db;
  if( pParse->nErr || db->mallocFailed ){
    goto insert_cleanup;
  }


  /* If the Select object is really just a simple VALUES() list with a
  ** single row (the common case) then keep that one row of values
  ** and discard the other (unused) parts of the pSelect object
  */
  if( pSelect && (pSelect->selFlags & SF_Values)!=0 && pSelect->pPrior==0 ){
    pList = pSelect->pEList;

  int tmask;                  /* Mask of trigger times */
#endif

  db = pParse->db;
  if( pParse->nErr || db->mallocFailed ){
    goto insert_cleanup;
  }
  dest.iSDParm = 0;  /* Suppress a harmless compiler warning */

  /* If the Select object is really just a simple VALUES() list with a
  ** single row (the common case) then keep that one row of values
  ** and discard the other (unused) parts of the pSelect object
  */
  if( pSelect && (pSelect->selFlags & SF_Values)!=0 && pSelect->pPrior==0 ){
    pList = pSelect->pEList;

  return reportError(SQLITE_MISUSE, lineno, "misuse");
}
int sqlite3CantopenError(int lineno){
  testcase( sqlite3GlobalConfig.xLog!=0 );
  return reportError(SQLITE_CANTOPEN, lineno, "cannot open file");
}
#ifdef SQLITE_DEBUG






int sqlite3NomemError(int lineno){
  testcase( sqlite3GlobalConfig.xLog!=0 );
  return reportError(SQLITE_NOMEM, lineno, "OOM");
}
int sqlite3IoerrnomemError(int lineno){
  testcase( sqlite3GlobalConfig.xLog!=0 );
  return reportError(SQLITE_IOERR_NOMEM, lineno, "I/O OOM error");

  return reportError(SQLITE_MISUSE, lineno, "misuse");
}
int sqlite3CantopenError(int lineno){
  testcase( sqlite3GlobalConfig.xLog!=0 );
  return reportError(SQLITE_CANTOPEN, lineno, "cannot open file");
}
#ifdef SQLITE_DEBUG
int sqlite3CorruptPgnoError(int lineno, Pgno pgno){
  char zMsg[100];
  sqlite3_snprintf(sizeof(zMsg), zMsg, "database corruption page %d", pgno);
  testcase( sqlite3GlobalConfig.xLog!=0 );
  return reportError(SQLITE_CORRUPT, lineno, zMsg);
}
int sqlite3NomemError(int lineno){
  testcase( sqlite3GlobalConfig.xLog!=0 );
  return reportError(SQLITE_NOMEM, lineno, "OOM");
}
int sqlite3IoerrnomemError(int lineno){
  testcase( sqlite3GlobalConfig.xLog!=0 );
  return reportError(SQLITE_IOERR_NOMEM, lineno, "I/O OOM error");

      }else{
        VdbeNoopComment((v, "materialize \"%s\"", pItem->pTab->zName));
      }
      pPrior = isSelfJoinView(pTabList, pItem);
      if( pPrior ){
        sqlite3VdbeAddOp2(v, OP_OpenDup, pItem->iCursor, pPrior->iCursor);
        explainSetInteger(pItem->iSelectId, pPrior->iSelectId);


      }else{
        sqlite3SelectDestInit(&dest, SRT_EphemTab, pItem->iCursor);
        explainSetInteger(pItem->iSelectId, (u8)pParse->iNextSelectId);
        sqlite3Select(pParse, pSub, &dest);
      }
      pItem->pTab->nRowLogEst = pSub->nSelectRow;
      if( onceAddr ) sqlite3VdbeJumpHere(v, onceAddr);

      }else{
        VdbeNoopComment((v, "materialize \"%s\"", pItem->pTab->zName));
      }
      pPrior = isSelfJoinView(pTabList, pItem);
      if( pPrior ){
        sqlite3VdbeAddOp2(v, OP_OpenDup, pItem->iCursor, pPrior->iCursor);
        explainSetInteger(pItem->iSelectId, pPrior->iSelectId);
        assert( pPrior->pSelect!=0 );
        pSub->nSelectRow = pPrior->pSelect->nSelectRow;
      }else{
        sqlite3SelectDestInit(&dest, SRT_EphemTab, pItem->iCursor);
        explainSetInteger(pItem->iSelectId, (u8)pParse->iNextSelectId);
        sqlite3Select(pParse, pSub, &dest);
      }
      pItem->pTab->nRowLogEst = pSub->nSelectRow;
      if( onceAddr ) sqlite3VdbeJumpHere(v, onceAddr);

** lower 30 bits of a 32-bit signed integer.
*/
static int strlen30(const char *z){
  const char *z2 = z;
  while( *z2 ){ z2++; }
  return 0x3fffffff & (int)(z2 - z);
}













/*
** This routine reads a line of text from FILE in, stores
** the text in memory obtained from malloc() and returns a pointer
** to the text.  NULL is returned at end of file, or if malloc()
** fails.
**
................................................................................
    SHA3Update(p, &c3, 1);
  }
  for(i=0; i<p->nRate; i++){
    p->u.x[i+p->nRate] = p->u.x[i^p->ixMask];
  }
  return &p->u.x[p->nRate];
}
























































/*
** Implementation of the sha3(X,SIZE) function.
**
** Return a BLOB which is the SIZE-bit SHA3 hash of X.  The default
** size is 256.  If X is a BLOB, it is hashed as is.
** For all other non-NULL types of input, X is converted into a UTF-8 string
................................................................................
          int w, n;
          if( i<ArraySize(p->colWidth) ){
            w = colWidth[i];
          }else{
            w = 0;
          }
          if( w==0 ){
            w = strlen30(azCol[i] ? azCol[i] : "");
            if( w<10 ) w = 10;
            n = strlen30(azArg && azArg[i] ? azArg[i] : p->nullValue);
            if( w<n ) w = n;
          }
          if( i<ArraySize(p->actualWidth) ){
            p->actualWidth[i] = w;
          }
          if( showHdr ){
            utf8_width_print(p->out, w, azCol[i]);
................................................................................
      for(i=0; i<nArg; i++){
        int w;
        if( i<ArraySize(p->actualWidth) ){
           w = p->actualWidth[i];
        }else{
           w = 10;
        }
        if( p->cMode==MODE_Explain && azArg[i] && strlen30(azArg[i])>w ){
          w = strlen30(azArg[i]);
        }
        if( i==1 && p->aiIndent && p->pStmt ){
          if( p->iIndent<p->nIndent ){
            utf8_printf(p->out, "%*.s", p->aiIndent[p->iIndent], "");
          }
          p->iIndent++;
        }
................................................................................
                            sha3Func, 0, 0);
    sqlite3_create_function(p->db, "sha3", 2, SQLITE_UTF8, 0,
                            sha3Func, 0, 0);
    sqlite3_create_function(p->db, "sha3_query", 1, SQLITE_UTF8, 0,
                            sha3QueryFunc, 0, 0);
    sqlite3_create_function(p->db, "sha3_query", 2, SQLITE_UTF8, 0,
                            sha3QueryFunc, 0, 0);



  }
}

/*
** Do C-language style dequoting.
**
**    \a    -> alarm
................................................................................
    }else{
      raw_printf(stderr, "Usage: .scanstats on|off\n");
      rc = 1;
    }
  }else

  if( c=='s' && strncmp(azArg[0], "schema", n)==0 ){

    ShellState data;
    char *zErrMsg = 0;



    open_db(p, 0);
    memcpy(&data, p, sizeof(data));
    data.showHeader = 0;
    data.cMode = data.mode = MODE_Semi;

    if( nArg>=2 && optionMatch(azArg[1], "indent") ){
      data.cMode = data.mode = MODE_Pretty;
      nArg--;
      if( nArg==2 ) azArg[1] = azArg[2];
    }
    if( nArg==2 && azArg[1][0]!='-' ){
      int i;
................................................................................
                      ")";
        new_argv[1] = 0;
        new_colv[0] = "sql";
        new_colv[1] = 0;
        callback(&data, 1, new_argv, new_colv);
        rc = SQLITE_OK;
      }else{
        char *zSql;
        zSql = sqlite3_mprintf(
          "SELECT sql FROM "
          "  (SELECT sql sql, type type, tbl_name tbl_name, name name, rowid x"
          "     FROM sqlite_master UNION ALL"
          "   SELECT sql, type, tbl_name, name, rowid FROM sqlite_temp_master) "
          "WHERE lower(tbl_name) LIKE %Q"
          "  AND type!='meta' AND sql NOTNULL "
          "ORDER BY rowid", azArg[1]);
        rc = sqlite3_exec(p->db, zSql, callback, &data, &zErrMsg);
        sqlite3_free(zSql);
      }
    }else if( nArg==1 ){
      rc = sqlite3_exec(p->db,
         "SELECT sql FROM "
         "  (SELECT sql sql, type type, tbl_name tbl_name, name name, rowid x"
         "     FROM sqlite_master UNION ALL"
         "   SELECT sql, type, tbl_name, name, rowid FROM sqlite_temp_master) "
         "WHERE type!='meta' AND sql NOTNULL AND name NOT LIKE 'sqlite_%' "
         "ORDER BY rowid",
         callback, &data, &zErrMsg
      );

    }else{
      raw_printf(stderr, "Usage: .schema ?--indent? ?LIKE-PATTERN?\n");
      rc = 1;
      goto meta_command_exit;
    }















































    if( zErrMsg ){
      utf8_printf(stderr,"Error: %s\n", zErrMsg);
      sqlite3_free(zErrMsg);
      rc = 1;
    }else if( rc != SQLITE_OK ){
      raw_printf(stderr,"Error: querying schema information\n");
      rc = 1;
................................................................................
  }else
#endif

  if( c=='s' && n>=4 && strncmp(azArg[0],"selftest",n)==0 ){
    int bIsInit = 0;         /* True to initialize the SELFTEST table */
    int bVerbose = 0;        /* Verbose output */
    int bSelftestExists;     /* True if SELFTEST already exists */
    char **azTest = 0;       /* Content of the SELFTEST table */
    int nRow = 0;            /* Number of rows in the SELFTEST table */
    int nCol = 4;            /* Number of columns in the SELFTEST table */
    int i;                   /* Loop counter */
    int nTest = 0;           /* Number of tests runs */
    int nErr = 0;            /* Number of errors seen */
    ShellText str;           /* Answer for a query */
    static char *azDefaultTest[] = {
       0, 0, 0, 0,
       "0", "memo", "Missing SELFTEST table - default checks only", "",
       "1", "run", "PRAGMA integrity_check", "ok"
    };
    static const int nDefaultRow = 2;

    open_db(p,0);
    for(i=1; i<nArg; i++){
      const char *z = azArg[i];
      if( z[0]=='-' && z[1]=='-' ) z++;
      if( strcmp(z,"-init")==0 ){
        bIsInit = 1;
................................................................................
    }else{
      bSelftestExists = 1;
    }
    if( bIsInit ){
      createSelftestTable(p);
      bSelftestExists = 1;
    }


    if( bSelftestExists ){

      rc = sqlite3_get_table(p->db,
          "SELECT tno,op,cmd,ans FROM selftest ORDER BY tno",
          &azTest, &nRow, &nCol, 0);







      if( rc ){
        raw_printf(stderr, "Error querying the selftest table\n");
        rc = 1;
        sqlite3_free_table(azTest);
        goto meta_command_exit;
      }else if( nRow==0 ){
        sqlite3_free_table(azTest);
        azTest = azDefaultTest;
        nRow = nDefaultRow;
      }
    }else{
      azTest = azDefaultTest;
      nRow = nDefaultRow;
    }
    initText(&str);
    appendText(&str, "x", 0);
    for(i=1; i<=nRow; i++){
      int tno = atoi(azTest[i*nCol]);


      const char *zOp = azTest[i*nCol+1];
      const char *zSql = azTest[i*nCol+2];
      const char *zAns = azTest[i*nCol+3];


      if( bVerbose>0 ){
        char *zQuote = sqlite3_mprintf("%q", zSql);
        printf("%d: %s %s\n", tno, zOp, zSql);
        sqlite3_free(zQuote);
      }
      if( strcmp(zOp,"memo")==0 ){
        utf8_printf(p->out, "%s\n", zSql);
      }else
      if( strcmp(zOp,"run")==0 ){
        char *zErrMsg = 0;
        str.n = 0;
        str.z[0] = 0;
        rc = sqlite3_exec(p->db, zSql, captureOutputCallback, &str, &zErrMsg);
        nTest++;
        if( bVerbose ){
          utf8_printf(p->out, "Result: %s\n", str.z);
        }
        if( rc || zErrMsg ){
          nErr++;
          rc = 1;
          utf8_printf(p->out, "%d: error-code-%d: %s\n", tno, rc, zErrMsg);
          sqlite3_free(zErrMsg);
        }else if( strcmp(zAns,str.z)!=0 ){
          nErr++;
          rc = 1;
          utf8_printf(p->out, "%d: Expected: [%s]\n", tno, zAns);
          utf8_printf(p->out, "%d:      Got: [%s]\n", tno, str.z);
        }
      }else
      {
        utf8_printf(stderr,
          "Unknown operation \"%s\" on selftest line %d\n", zOp, tno);
        rc = 1;
        break;
      }
    }



    freeText(&str);
    if( azTest!=azDefaultTest ) sqlite3_free_table(azTest);
    utf8_printf(p->out, "%d errors out of %d tests\n", nErr, nTest);
  }else

  if( c=='s' && strncmp(azArg[0], "separator", n)==0 ){
    if( nArg<2 || nArg>3 ){
      raw_printf(stderr, "Usage: .separator COL ?ROW?\n");
      rc = 1;
................................................................................
  if( (c=='t' && n>1 && strncmp(azArg[0], "tables", n)==0)
   || (c=='i' && (strncmp(azArg[0], "indices", n)==0
                 || strncmp(azArg[0], "indexes", n)==0) )
  ){
    sqlite3_stmt *pStmt;
    char **azResult;
    int nRow, nAlloc;
    char *zSql = 0;
    int ii;


    open_db(p, 0);
    rc = sqlite3_prepare_v2(p->db, "PRAGMA database_list", -1, &pStmt, 0);
    if( rc ) return shellDatabaseError(p->db);

    /* Create an SQL statement to query for the list of tables in the
    ** main and all attached databases where the table name matches the
    ** LIKE pattern bound to variable "?1". */
    if( c=='t' ){
      zSql = sqlite3_mprintf(
          "SELECT name FROM sqlite_master"
          " WHERE type IN ('table','view')"
          "   AND name NOT LIKE 'sqlite_%%'"
          "   AND name LIKE ?1");
    }else if( nArg>2 ){
      /* It is an historical accident that the .indexes command shows an error
      ** when called with the wrong number of arguments whereas the .tables
      ** command does not. */
      raw_printf(stderr, "Usage: .indexes ?LIKE-PATTERN?\n");
      rc = 1;
      goto meta_command_exit;
    }else{
      zSql = sqlite3_mprintf(
          "SELECT name FROM sqlite_master"
          " WHERE type='index'"
          "   AND tbl_name LIKE ?1");
    }
    for(ii=0; zSql && sqlite3_step(pStmt)==SQLITE_ROW; ii++){
      const char *zDbName = (const char*)sqlite3_column_text(pStmt, 1);
      if( zDbName==0 || ii==0 ) continue;
      if( c=='t' ){
        zSql = sqlite3_mprintf(
                 "%z UNION ALL "
                 "SELECT '%q.' || name FROM \"%w\".sqlite_master"
                 " WHERE type IN ('table','view')"
                 "   AND name NOT LIKE 'sqlite_%%'"
                 "   AND name LIKE ?1", zSql, zDbName, zDbName);
      }else{
        zSql = sqlite3_mprintf(
                 "%z UNION ALL "
                 "SELECT '%q.' || name FROM \"%w\".sqlite_master"
                 " WHERE type='index'"
                 "   AND tbl_name LIKE ?1", zSql, zDbName, zDbName);
      }
    }
    rc = sqlite3_finalize(pStmt);
    if( zSql && rc==SQLITE_OK ){
      zSql = sqlite3_mprintf("%z ORDER BY 1", zSql);
      if( zSql ) rc = sqlite3_prepare_v2(p->db, zSql, -1, &pStmt, 0);
    }
    sqlite3_free(zSql);
    if( !zSql ) return shellNomemError();

    if( rc ) return shellDatabaseError(p->db);

    /* Run the SQL statement prepared by the above block. Store the results
    ** as an array of nul-terminated strings in azResult[].  */
    nRow = nAlloc = 0;
    azResult = 0;
    if( nArg>1 ){

** lower 30 bits of a 32-bit signed integer.
*/
static int strlen30(const char *z){
  const char *z2 = z;
  while( *z2 ){ z2++; }
  return 0x3fffffff & (int)(z2 - z);
}

/*
** Return the length of a string in characters.  Multibyte UTF8 characters
** count as a single character.
*/
static int strlenChar(const char *z){
  int n = 0;
  while( *z ){
    if( (0xc0&*(z++))!=0x80 ) n++;
  }
  return n;
}

/*
** This routine reads a line of text from FILE in, stores
** the text in memory obtained from malloc() and returns a pointer
** to the text.  NULL is returned at end of file, or if malloc()
** fails.
**
................................................................................
    SHA3Update(p, &c3, 1);
  }
  for(i=0; i<p->nRate; i++){
    p->u.x[i+p->nRate] = p->u.x[i^p->ixMask];
  }
  return &p->u.x[p->nRate];
}

/*
** SQL function:  shell_add_schema(S,X)
**
** Add the schema name X to the CREATE statement in S and return the result.
** Examples:
**
**    CREATE TABLE t1(x)   ->   CREATE TABLE xyz.t1(x);
**
** Also works on
**
**    CREATE INDEX
**    CREATE UNIQUE INDEX
**    CREATE VIEW
**    CREATE TRIGGER
**    CREATE VIRTUAL TABLE
**
** This UDF is used by the .schema command to insert the schema name of
** attached databases into the middle of the sqlite_master.sql field.
*/
static void shellAddSchemaName(
  sqlite3_context *pCtx,
  int nVal,
  sqlite3_value **apVal
){
  static const char *aPrefix[] = {
     "TABLE",
     "INDEX",
     "UNIQUE INDEX",
     "VIEW",
     "TRIGGER",
     "VIRTUAL TABLE"
  };
  int i = 0;
  const char *zIn = (const char*)sqlite3_value_text(apVal[0]);
  const char *zSchema = (const char*)sqlite3_value_text(apVal[1]);
  assert( nVal==2 );
  if( zIn!=0 && strncmp(zIn, "CREATE ", 7)==0 ){
    for(i=0; i<sizeof(aPrefix)/sizeof(aPrefix[0]); i++){
      int n = strlen30(aPrefix[i]);
      if( strncmp(zIn+7, aPrefix[i], n)==0 && zIn[n+7]==' ' ){
        char cQuote = quoteChar(zSchema);
        char *z;
        if( cQuote ){
         z = sqlite3_mprintf("%.*s \"%w\".%s", n+7, zIn, zSchema, zIn+n+8);
        }else{
          z = sqlite3_mprintf("%.*s %s.%s", n+7, zIn, zSchema, zIn+n+8);
        }
        sqlite3_result_text(pCtx, z, -1, sqlite3_free);
        return;
      }
    }
  }
  sqlite3_result_value(pCtx, apVal[0]);
}

/*
** Implementation of the sha3(X,SIZE) function.
**
** Return a BLOB which is the SIZE-bit SHA3 hash of X.  The default
** size is 256.  If X is a BLOB, it is hashed as is.
** For all other non-NULL types of input, X is converted into a UTF-8 string
................................................................................
          int w, n;
          if( i<ArraySize(p->colWidth) ){
            w = colWidth[i];
          }else{
            w = 0;
          }
          if( w==0 ){
            w = strlenChar(azCol[i] ? azCol[i] : "");
            if( w<10 ) w = 10;
            n = strlenChar(azArg && azArg[i] ? azArg[i] : p->nullValue);
            if( w<n ) w = n;
          }
          if( i<ArraySize(p->actualWidth) ){
            p->actualWidth[i] = w;
          }
          if( showHdr ){
            utf8_width_print(p->out, w, azCol[i]);
................................................................................
      for(i=0; i<nArg; i++){
        int w;
        if( i<ArraySize(p->actualWidth) ){
           w = p->actualWidth[i];
        }else{
           w = 10;
        }
        if( p->cMode==MODE_Explain && azArg[i] && strlenChar(azArg[i])>w ){
          w = strlenChar(azArg[i]);
        }
        if( i==1 && p->aiIndent && p->pStmt ){
          if( p->iIndent<p->nIndent ){
            utf8_printf(p->out, "%*.s", p->aiIndent[p->iIndent], "");
          }
          p->iIndent++;
        }
................................................................................
                            sha3Func, 0, 0);
    sqlite3_create_function(p->db, "sha3", 2, SQLITE_UTF8, 0,
                            sha3Func, 0, 0);
    sqlite3_create_function(p->db, "sha3_query", 1, SQLITE_UTF8, 0,
                            sha3QueryFunc, 0, 0);
    sqlite3_create_function(p->db, "sha3_query", 2, SQLITE_UTF8, 0,
                            sha3QueryFunc, 0, 0);
    sqlite3_create_function(p->db, "shell_add_schema", 2, SQLITE_UTF8, 0,
                            shellAddSchemaName, 0, 0);
                            
  }
}

/*
** Do C-language style dequoting.
**
**    \a    -> alarm
................................................................................
    }else{
      raw_printf(stderr, "Usage: .scanstats on|off\n");
      rc = 1;
    }
  }else

  if( c=='s' && strncmp(azArg[0], "schema", n)==0 ){
    ShellText sSelect;
    ShellState data;
    char *zErrMsg = 0;
    const char *zDiv = 0;
    int iSchema = 0;

    open_db(p, 0);
    memcpy(&data, p, sizeof(data));
    data.showHeader = 0;
    data.cMode = data.mode = MODE_Semi;
    initText(&sSelect);
    if( nArg>=2 && optionMatch(azArg[1], "indent") ){
      data.cMode = data.mode = MODE_Pretty;
      nArg--;
      if( nArg==2 ) azArg[1] = azArg[2];
    }
    if( nArg==2 && azArg[1][0]!='-' ){
      int i;
................................................................................
                      ")";
        new_argv[1] = 0;
        new_colv[0] = "sql";
        new_colv[1] = 0;
        callback(&data, 1, new_argv, new_colv);
        rc = SQLITE_OK;
      }else{
        zDiv = "(";










      }
    }else if( nArg==1 ){









      zDiv = "(";
    }else{
      raw_printf(stderr, "Usage: .schema ?--indent? ?LIKE-PATTERN?\n");
      rc = 1;
      goto meta_command_exit;
    }
    if( zDiv ){
      sqlite3_stmt *pStmt = 0;
      sqlite3_prepare_v2(p->db, "SELECT name FROM pragma_database_list",
                         -1, &pStmt, 0);
      appendText(&sSelect, "SELECT sql FROM", 0);
      iSchema = 0;
      while( sqlite3_step(pStmt)==SQLITE_ROW ){
        const char *zDb = (const char*)sqlite3_column_text(pStmt, 0);
        char zScNum[30];
        sqlite3_snprintf(sizeof(zScNum), zScNum, "%d", ++iSchema);
        appendText(&sSelect, zDiv, 0);
        zDiv = " UNION ALL ";
        if( strcmp(zDb, "main")!=0 ){
          appendText(&sSelect, "SELECT shell_add_schema(sql,", 0);
          appendText(&sSelect, zDb, '"');
          appendText(&sSelect, ") AS sql, type, tbl_name, name, rowid,", 0);
          appendText(&sSelect, zScNum, 0);
          appendText(&sSelect, " AS snum, ", 0);
          appendText(&sSelect, zDb, '\'');
          appendText(&sSelect, " AS sname FROM ", 0);
          appendText(&sSelect, zDb, '"');
          appendText(&sSelect, ".sqlite_master", 0);
        }else{
          appendText(&sSelect, "SELECT sql, type, tbl_name, name, rowid, ", 0);
          appendText(&sSelect, zScNum, 0);
          appendText(&sSelect, " AS snum, 'main' AS sname FROM sqlite_master",0);
        }
      }
      sqlite3_finalize(pStmt);
      appendText(&sSelect, ") WHERE ", 0);
      if( nArg>1 ){
        char *zQarg = sqlite3_mprintf("%Q", azArg[1]);
        if( strchr(azArg[1], '.') ){
          appendText(&sSelect, "lower(printf('%s.%s',sname,tbl_name))", 0);
        }else{
          appendText(&sSelect, "lower(tbl_name)", 0);
        }
        appendText(&sSelect, strchr(azArg[1], '*') ? " GLOB " : " LIKE ", 0);
        appendText(&sSelect, zQarg, 0);
        appendText(&sSelect, " AND ", 0);
        sqlite3_free(zQarg);
      }
      appendText(&sSelect, "type!='meta' AND sql IS NOT NULL"
                           " ORDER BY snum, rowid", 0);
      rc = sqlite3_exec(p->db, sSelect.z, callback, &data, &zErrMsg);
      freeText(&sSelect);
    }
    if( zErrMsg ){
      utf8_printf(stderr,"Error: %s\n", zErrMsg);
      sqlite3_free(zErrMsg);
      rc = 1;
    }else if( rc != SQLITE_OK ){
      raw_printf(stderr,"Error: querying schema information\n");
      rc = 1;
................................................................................
  }else
#endif

  if( c=='s' && n>=4 && strncmp(azArg[0],"selftest",n)==0 ){
    int bIsInit = 0;         /* True to initialize the SELFTEST table */
    int bVerbose = 0;        /* Verbose output */
    int bSelftestExists;     /* True if SELFTEST already exists */



    int i, k;                /* Loop counters */
    int nTest = 0;           /* Number of tests runs */
    int nErr = 0;            /* Number of errors seen */
    ShellText str;           /* Answer for a query */
    sqlite3_stmt *pStmt = 0; /* Query against the SELFTEST table */






    open_db(p,0);
    for(i=1; i<nArg; i++){
      const char *z = azArg[i];
      if( z[0]=='-' && z[1]=='-' ) z++;
      if( strcmp(z,"-init")==0 ){
        bIsInit = 1;
................................................................................
    }else{
      bSelftestExists = 1;
    }
    if( bIsInit ){
      createSelftestTable(p);
      bSelftestExists = 1;
    }
    initText(&str);
    appendText(&str, "x", 0);
    for(k=bSelftestExists; k>=0; k--){
      if( k==1 ){
        rc = sqlite3_prepare_v2(p->db,
            "SELECT tno,op,cmd,ans FROM selftest ORDER BY tno",

            -1, &pStmt, 0);
      }else{
        rc = sqlite3_prepare_v2(p->db,
          "VALUES(0,'memo','Missing SELFTEST table - default checks only',''),"
          "      (1,'run','PRAGMA integrity_check','ok')",
          -1, &pStmt, 0);
      }
      if( rc ){
        raw_printf(stderr, "Error querying the selftest table\n");
        rc = 1;
        sqlite3_finalize(pStmt);
        goto meta_command_exit;




      }








      for(i=1; sqlite3_step(pStmt)==SQLITE_ROW; i++){
        int tno = sqlite3_column_int(pStmt, 0);
        const char *zOp = (const char*)sqlite3_column_text(pStmt, 1);
        const char *zSql = (const char*)sqlite3_column_text(pStmt, 2);
        const char *zAns = (const char*)sqlite3_column_text(pStmt, 3);

        k = 0;
        if( bVerbose>0 ){
          char *zQuote = sqlite3_mprintf("%q", zSql);
          printf("%d: %s %s\n", tno, zOp, zSql);
          sqlite3_free(zQuote);
        }
        if( strcmp(zOp,"memo")==0 ){
          utf8_printf(p->out, "%s\n", zSql);
        }else
        if( strcmp(zOp,"run")==0 ){
          char *zErrMsg = 0;
          str.n = 0;
          str.z[0] = 0;
          rc = sqlite3_exec(p->db, zSql, captureOutputCallback, &str, &zErrMsg);
          nTest++;
          if( bVerbose ){
            utf8_printf(p->out, "Result: %s\n", str.z);
          }
          if( rc || zErrMsg ){
            nErr++;
            rc = 1;
            utf8_printf(p->out, "%d: error-code-%d: %s\n", tno, rc, zErrMsg);
            sqlite3_free(zErrMsg);
          }else if( strcmp(zAns,str.z)!=0 ){
            nErr++;
            rc = 1;
            utf8_printf(p->out, "%d: Expected: [%s]\n", tno, zAns);
            utf8_printf(p->out, "%d:      Got: [%s]\n", tno, str.z);
          }
        }else
        {
          utf8_printf(stderr,
            "Unknown operation \"%s\" on selftest line %d\n", zOp, tno);
          rc = 1;
          break;
        }

      } /* End loop over rows of content from SELFTEST */
      sqlite3_finalize(pStmt);
    } /* End loop over k */
    freeText(&str);

    utf8_printf(p->out, "%d errors out of %d tests\n", nErr, nTest);
  }else

  if( c=='s' && strncmp(azArg[0], "separator", n)==0 ){
    if( nArg<2 || nArg>3 ){
      raw_printf(stderr, "Usage: .separator COL ?ROW?\n");
      rc = 1;
................................................................................
  if( (c=='t' && n>1 && strncmp(azArg[0], "tables", n)==0)
   || (c=='i' && (strncmp(azArg[0], "indices", n)==0
                 || strncmp(azArg[0], "indexes", n)==0) )
  ){
    sqlite3_stmt *pStmt;
    char **azResult;
    int nRow, nAlloc;

    int ii;
    ShellText s;
    initText(&s);
    open_db(p, 0);
    rc = sqlite3_prepare_v2(p->db, "PRAGMA database_list", -1, &pStmt, 0);
    if( rc ) return shellDatabaseError(p->db);










    if( nArg>2 && c=='i' ){
      /* It is an historical accident that the .indexes command shows an error
      ** when called with the wrong number of arguments whereas the .tables
      ** command does not. */
      raw_printf(stderr, "Usage: .indexes ?LIKE-PATTERN?\n");
      rc = 1;
      goto meta_command_exit;
    }
    for(ii=0; sqlite3_step(pStmt)==SQLITE_ROW; ii++){
      const char *zDbName = (const char*)sqlite3_column_text(pStmt, 1);
      if( zDbName==0 ) continue;
      if( s.z && s.z[0] ) appendText(&s, " UNION ALL ", 0);
      if( sqlite3_stricmp(zDbName, "main")==0 ){
        appendText(&s, "SELECT name FROM ", 0);
      }else{
        appendText(&s, "SELECT ", 0);
        appendText(&s, zDbName, '\'');
        appendText(&s, "||'.'||name FROM ", 0);
      }
      appendText(&s, zDbName, '"');
      appendText(&s, ".sqlite_master ", 0);
      if( c=='t' ){
        appendText(&s," WHERE type IN ('table','view')"
                      "   AND name NOT LIKE 'sqlite_%'"
                      "   AND name LIKE ?1", 0);
      }else{
        appendText(&s," WHERE type='index'"
                      "   AND tbl_name LIKE ?1", 0);

      }
    }
    rc = sqlite3_finalize(pStmt);
    appendText(&s, " ORDER BY 1", 0);

    rc = sqlite3_prepare_v2(p->db, s.z, -1, &pStmt, 0);



    freeText(&s);
    if( rc ) return shellDatabaseError(p->db);

    /* Run the SQL statement prepared by the above block. Store the results
    ** as an array of nul-terminated strings in azResult[].  */
    nRow = nAlloc = 0;
    azResult = 0;
    if( nArg>1 ){

** interface returns SQLITE_OK and fills in the non-NULL pointers in
** the final five arguments with appropriate values if the specified
** column exists.  ^The sqlite3_table_column_metadata() interface returns
** SQLITE_ERROR and if the specified column does not exist.
** ^If the column-name parameter to sqlite3_table_column_metadata() is a
** NULL pointer, then this routine simply checks for the existence of the
** table and returns SQLITE_OK if the table exists and SQLITE_ERROR if it
** does not.


**
** ^The column is identified by the second, third and fourth parameters to
** this function. ^(The second parameter is either the name of the database
** (i.e. "main", "temp", or an attached database) containing the specified
** table or NULL.)^ ^If it is NULL, then all attached databases are searched
** for the table using the same algorithm used by the database engine to
** resolve unqualified table references.

** interface returns SQLITE_OK and fills in the non-NULL pointers in
** the final five arguments with appropriate values if the specified
** column exists.  ^The sqlite3_table_column_metadata() interface returns
** SQLITE_ERROR and if the specified column does not exist.
** ^If the column-name parameter to sqlite3_table_column_metadata() is a
** NULL pointer, then this routine simply checks for the existence of the
** table and returns SQLITE_OK if the table exists and SQLITE_ERROR if it
** does not.  If the table name parameter T in a call to
** sqlite3_table_column_metadata(X,D,T,C,...) is NULL then the result is
** undefined behavior.
**
** ^The column is identified by the second, third and fourth parameters to
** this function. ^(The second parameter is either the name of the database
** (i.e. "main", "temp", or an attached database) containing the specified
** table or NULL.)^ ^If it is NULL, then all attached databases are searched
** for the table using the same algorithm used by the database engine to
** resolve unqualified table references.

int sqlite3CantopenError(int);
#define SQLITE_CORRUPT_BKPT sqlite3CorruptError(__LINE__)
#define SQLITE_MISUSE_BKPT sqlite3MisuseError(__LINE__)
#define SQLITE_CANTOPEN_BKPT sqlite3CantopenError(__LINE__)
#ifdef SQLITE_DEBUG
  int sqlite3NomemError(int);
  int sqlite3IoerrnomemError(int);

# define SQLITE_NOMEM_BKPT sqlite3NomemError(__LINE__)
# define SQLITE_IOERR_NOMEM_BKPT sqlite3IoerrnomemError(__LINE__)

#else
# define SQLITE_NOMEM_BKPT SQLITE_NOMEM
# define SQLITE_IOERR_NOMEM_BKPT SQLITE_IOERR_NOMEM

#endif

/*
** FTS3 and FTS4 both require virtual table support
*/
#if defined(SQLITE_OMIT_VIRTUALTABLE)
# undef SQLITE_ENABLE_FTS3

int sqlite3CantopenError(int);
#define SQLITE_CORRUPT_BKPT sqlite3CorruptError(__LINE__)
#define SQLITE_MISUSE_BKPT sqlite3MisuseError(__LINE__)
#define SQLITE_CANTOPEN_BKPT sqlite3CantopenError(__LINE__)
#ifdef SQLITE_DEBUG
  int sqlite3NomemError(int);
  int sqlite3IoerrnomemError(int);
  int sqlite3CorruptPgnoError(int,Pgno);
# define SQLITE_NOMEM_BKPT sqlite3NomemError(__LINE__)
# define SQLITE_IOERR_NOMEM_BKPT sqlite3IoerrnomemError(__LINE__)
# define SQLITE_CORRUPT_PGNO(P) sqlite3CorruptPgnoError(__LINE__,(P))
#else
# define SQLITE_NOMEM_BKPT SQLITE_NOMEM
# define SQLITE_IOERR_NOMEM_BKPT SQLITE_IOERR_NOMEM
# define SQLITE_CORRUPT_PGNO(P) sqlite3CorruptError(__LINE__)
#endif

/*
** FTS3 and FTS4 both require virtual table support
*/
#if defined(SQLITE_OMIT_VIRTUALTABLE)
# undef SQLITE_ENABLE_FTS3

      for(i=nPrefix; zQuery[i]; i++){
        if( zQuery[i]==aWild[0] || zQuery[i]==aWild[1] ) break;
        if( zQuery[i]=='/' ) nDir = i;
      }
      zDir = zQuery;
    }
  }


  sqlite3_bind_text(pCsr->pStmt, 1, zDir, nDir, SQLITE_TRANSIENT);
  sqlite3_bind_text(pCsr->pStmt, 2, zRoot, nRoot, SQLITE_TRANSIENT);
  sqlite3_bind_text(pCsr->pStmt, 3, zPrefix, nPrefix, SQLITE_TRANSIENT);

#if SQLITE_OS_WIN
  sqlite3_free(zPrefix);

      for(i=nPrefix; zQuery[i]; i++){
        if( zQuery[i]==aWild[0] || zQuery[i]==aWild[1] ) break;
        if( zQuery[i]=='/' ) nDir = i;
      }
      zDir = zQuery;
    }
  }
  if( nDir==0 ) nDir = 1;

  sqlite3_bind_text(pCsr->pStmt, 1, zDir, nDir, SQLITE_TRANSIENT);
  sqlite3_bind_text(pCsr->pStmt, 2, zRoot, nRoot, SQLITE_TRANSIENT);
  sqlite3_bind_text(pCsr->pStmt, 3, zPrefix, nPrefix, SQLITE_TRANSIENT);

#if SQLITE_OS_WIN
  sqlite3_free(zPrefix);

    char *z;

    /* Make an entry in the sqlite_master table */
    v = sqlite3GetVdbe(pParse);
    if( v==0 ) goto triggerfinish_cleanup;
    sqlite3BeginWriteOperation(pParse, 0, iDb);
    z = sqlite3DbStrNDup(db, (char*)pAll->z, pAll->n);

    sqlite3NestedParse(pParse,
       "INSERT INTO %Q.%s VALUES('trigger',%Q,%Q,0,'CREATE TRIGGER %q')",
       db->aDb[iDb].zDbSName, MASTER_NAME, zName,
       pTrig->table, z);
    sqlite3DbFree(db, z);
    sqlite3ChangeCookie(pParse, iDb);
    sqlite3VdbeAddParseSchemaOp(v, iDb,

    char *z;

    /* Make an entry in the sqlite_master table */
    v = sqlite3GetVdbe(pParse);
    if( v==0 ) goto triggerfinish_cleanup;
    sqlite3BeginWriteOperation(pParse, 0, iDb);
    z = sqlite3DbStrNDup(db, (char*)pAll->z, pAll->n);
    testcase( z==0 );
    sqlite3NestedParse(pParse,
       "INSERT INTO %Q.%s VALUES('trigger',%Q,%Q,0,'CREATE TRIGGER %q')",
       db->aDb[iDb].zDbSName, MASTER_NAME, zName,
       pTrig->table, z);
    sqlite3DbFree(db, z);
    sqlite3ChangeCookie(pParse, iDb);
    sqlite3VdbeAddParseSchemaOp(v, iDb,

    }
    if( pVal->flags & (MEM_Int|MEM_Real) ) pVal->flags &= ~MEM_Str;
    if( enc!=SQLITE_UTF8 ){
      rc = sqlite3VdbeChangeEncoding(pVal, enc);
    }
  }else if( op==TK_UMINUS ) {
    /* This branch happens for multiple negative signs.  Ex: -(-5) */
    if( SQLITE_OK==sqlite3ValueFromExpr(db,pExpr->pLeft,enc,affinity,&pVal) 
     && pVal!=0
    ){
      sqlite3VdbeMemNumerify(pVal);
      if( pVal->flags & MEM_Real ){
        pVal->u.r = -pVal->u.r;
      }else if( pVal->u.i==SMALLEST_INT64 ){
        pVal->u.r = -(double)SMALLEST_INT64;

    }
    if( pVal->flags & (MEM_Int|MEM_Real) ) pVal->flags &= ~MEM_Str;
    if( enc!=SQLITE_UTF8 ){
      rc = sqlite3VdbeChangeEncoding(pVal, enc);
    }
  }else if( op==TK_UMINUS ) {
    /* This branch happens for multiple negative signs.  Ex: -(-5) */
    if( SQLITE_OK==valueFromExpr(db,pExpr->pLeft,enc,affinity,&pVal,pCtx) 
     && pVal!=0
    ){
      sqlite3VdbeMemNumerify(pVal);
      if( pVal->flags & MEM_Real ){
        pVal->u.r = -pVal->u.r;
      }else if( pVal->u.i==SMALLEST_INT64 ){
        pVal->u.r = -(double)SMALLEST_INT64;

#ifdef WHERETRACE_ENABLED
    if( sqlite3WhereTrace ){    /* Display all of the WhereLoop objects */
      WhereLoop *p;
      int i;
      static const char zLabel[] = "0123456789abcdefghijklmnopqrstuvwyxz"
                                             "ABCDEFGHIJKLMNOPQRSTUVWYXZ";
      for(p=pWInfo->pLoops, i=0; p; p=p->pNextLoop, i++){
        p->cId = zLabel[i%sizeof(zLabel)];
        whereLoopPrint(p, sWLB.pWC);
      }
    }
#endif
  
    wherePathSolver(pWInfo, 0);
    if( db->mallocFailed ) goto whereBeginError;

#ifdef WHERETRACE_ENABLED
    if( sqlite3WhereTrace ){    /* Display all of the WhereLoop objects */
      WhereLoop *p;
      int i;
      static const char zLabel[] = "0123456789abcdefghijklmnopqrstuvwyxz"
                                             "ABCDEFGHIJKLMNOPQRSTUVWYXZ";
      for(p=pWInfo->pLoops, i=0; p; p=p->pNextLoop, i++){
        p->cId = zLabel[i%(sizeof(zLabel)-1)];
        whereLoopPrint(p, sWLB.pWC);
      }
    }
#endif
  
    wherePathSolver(pWInfo, 0);
    if( db->mallocFailed ) goto whereBeginError;

  execsql { INSERT INTO t1 SELECT NULL, randstr(50,50) FROM t1 }
} {}
do_test autovacuum-9.5 {
  execsql { DELETE FROM t1 WHERE rowid > (SELECT max(a)/2 FROM t1) }
  file size test.db
} $::sqlite_pending_byte
 








finish_test

  execsql { INSERT INTO t1 SELECT NULL, randstr(50,50) FROM t1 }
} {}
do_test autovacuum-9.5 {
  execsql { DELETE FROM t1 WHERE rowid > (SELECT max(a)/2 FROM t1) }
  file size test.db
} $::sqlite_pending_byte
 
do_execsql_test autovacuum-10.1 {
  DROP TABLE t1;
  CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
  INSERT INTO t1 VALUES(25, randomblob(104));
  REPLACE INTO t1 VALUES(25, randomblob(1117));
  PRAGMA integrity_check;
} {ok}

finish_test

"\n"
"        Generate a new test database file named DBFILE containing N\n"
"        BLOBs each of size M bytes.  The page size of the new database\n"
"        file will be X.  Additional options:\n"
"\n"
"           --variance V           Randomly vary M by plus or minus V\n"
"\n"
"   kvtest export DBFILE DIRECTORY\n"
"\n"
"        Export all the blobs in the kv table of DBFILE into separate\n"
"        files in DIRECTORY.\n"





"\n"
"   kvtest stat DBFILE\n"
"\n"
"        Display summary information about DBFILE\n"


"\n"
"   kvtest run DBFILE [options]\n"
"\n"
"        Run a performance test.  DBFILE can be either the name of a\n"
"        database or a directory containing sample files.  Options:\n"
"\n"
"           --asc                  Read blobs in ascending order\n"
................................................................................
"           --cache-size N         Database cache size\n"
"           --count N              Read N blobs\n"
"           --desc                 Read blobs in descending order\n"
"           --fsync                Synchronous file writes\n"
"           --integrity-check      Run \"PRAGMA integrity_check\" after test\n"
"           --max-id N             Maximum blob key to use\n"
"           --mmap N               Mmap as much as N bytes of DBFILE\n"


"           --nosync               Set \"PRAGMA synchronous=OFF\"\n"
"           --jmode MODE           Set MODE journal mode prior to starting\n"
"           --random               Read blobs in a random order\n"
"           --start N              Start reading with this blob key\n"
"           --stats                Output operating stats before exiting\n"
"           --update               To an overwrite test\n"
;

/* Reference resources used */
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
................................................................................
#include <string.h>
#include "sqlite3.h"

#ifndef _WIN32
# include <unistd.h>
#else
  /* Provide Windows equivalent for the needed parts of unistd.h */

# include <io.h>
# define R_OK 2
# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
# define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
# define access _access
#endif

#include <stdint.h>
#include <inttypes.h>

/*
** The following macros are used to cast pointers to integers and
** integers to pointers.  The way you do this varies from one compiler
** to the next, so we have developed the following set of #if statements
** to generate appropriate macros for a wide range of compilers.
**
................................................................................
** the ((void*)&((char*)0)[X]) construct.  But MSVC chokes on ((void*)(X)).
** So we have to define the macros in different ways depending on the
** compiler.
*/
#if defined(__PTRDIFF_TYPE__)  /* This case should work for GCC */
# define SQLITE_INT_TO_PTR(X)  ((void*)(__PTRDIFF_TYPE__)(X))
# define SQLITE_PTR_TO_INT(X)  ((sqlite3_int64)(__PTRDIFF_TYPE__)(X))
#elif !defined(__GNUC__)       /* Works for compilers other than LLVM */
# define SQLITE_INT_TO_PTR(X)  ((void*)&((char*)0)[X])
# define SQLITE_PTR_TO_INT(X)  ((sqlite3_int64)(((char*)X)-(char*)0))
#elif defined(HAVE_STDINT_H)   /* Use this case if we have ANSI headers */
# define SQLITE_INT_TO_PTR(X)  ((void*)(intptr_t)(X))
# define SQLITE_PTR_TO_INT(X)  ((sqlite3_int64)(intptr_t)(X))
#else                          /* Generates a warning - but it always works */
# define SQLITE_INT_TO_PTR(X)  ((void*)(X))
# define SQLITE_PTR_TO_INT(X)  ((sqlite3_int64)(X))
#endif

/*
** Show thqe help text and quit.
*/
static void showHelp(void){
  fprintf(stdout, "%s", zHelp);
................................................................................
  return isNeg? -v : v;
}


/*
** Check the filesystem object zPath.  Determine what it is:
**
**    PATH_DIR     A directory

**    PATH_DB      An SQLite database
**    PATH_NEXIST  Does not exist
**    PATH_OTHER   Something else








*/
#define PATH_DIR     1

#define PATH_DB      2
#define PATH_NEXIST  0
#define PATH_OTHER   99
static int pathType(const char *zPath){
  struct stat x;
  int rc;
  if( access(zPath,R_OK) ) return PATH_NEXIST;
  memset(&x, 0, sizeof(x));
  rc = stat(zPath, &x);
  if( rc<0 ) return PATH_OTHER;






  if( S_ISDIR(x.st_mode) ) return PATH_DIR;


  if( (x.st_size%512)==0 ) return PATH_DB;
  return PATH_OTHER;
}

/*
** Return the size of a file in bytes.  Or return -1 if the
** named object is not a regular file or does not exist.
................................................................................
*/
static int statMain(int argc, char **argv){
  char *zDb;
  int i, rc;
  sqlite3 *db;
  char *zSql;
  sqlite3_stmt *pStmt;


  assert( strcmp(argv[1],"stat")==0 );
  assert( argc>=3 );
  zDb = argv[2];
  for(i=3; i<argc; i++){
    char *z = argv[i];
    if( z[0]!='-' ) fatalError("unknown argument: \"%s\"", z);
    if( z[1]=='-' ) z++;




    fatalError("unknown option: \"%s\"", argv[i]);
  }
  rc = sqlite3_open(zDb, &db);
  if( rc ){
    fatalError("cannot open database \"%s\": %s", zDb, sqlite3_errmsg(db));
  }





  zSql = sqlite3_mprintf(
    "SELECT count(*), min(length(v)), max(length(v)), avg(length(v))"
    "  FROM kv"
  );
  rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
  if( rc ) fatalError("cannot prepare SQL [%s]: %s", zSql, sqlite3_errmsg(db));
  sqlite3_free(zSql);
................................................................................
  zSql = sqlite3_mprintf("PRAGMA page_count");
  rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
  if( rc ) fatalError("cannot prepare SQL [%s]: %s", zSql, sqlite3_errmsg(db));
  sqlite3_free(zSql);
  if( sqlite3_step(pStmt)==SQLITE_ROW ){
    printf("Page-count:         %8d\n", sqlite3_column_int(pStmt, 0));
  }
  sqlite3_finalize(pStmt);
  sqlite3_close(db);
  return 0;
}

/*
** Implementation of the "writefile(X,Y)" SQL function.  The argument Y
** is written into file X.  The number of bytes written is returned.  Or
** NULL is returned if something goes wrong, such as being unable to open
** file X for writing.
*/
static void writefileFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  FILE *out;
  const char *z;
  sqlite3_int64 rc;
  const char *zFile;

  zFile = (const char*)sqlite3_value_text(argv[0]);
  if( zFile==0 ) return;
  out = fopen(zFile, "wb");
  if( out==0 ) return;
  z = (const char*)sqlite3_value_blob(argv[1]);
  if( z==0 ){
    rc = 0;
  }else{
    rc = fwrite(z, 1, sqlite3_value_bytes(argv[1]), out);
  }
  fclose(out);
  printf("\r%s   ", zFile); fflush(stdout);
  sqlite3_result_int64(context, rc);
}

/*
**      remember(V,PTR)
**
** Return the integer value V.  Also save the value of V in a
** C-language variable whose address is PTR.
*/
static void rememberFunc(
................................................................................
  sqlite3_int64 ptr;
  assert( argc==2 );
  v = sqlite3_value_int64(argv[0]);
  ptr = sqlite3_value_int64(argv[1]);
  *(sqlite3_int64*)SQLITE_INT_TO_PTR(ptr) = v;
  sqlite3_result_int64(pCtx, v);
}












/*
** Export the kv table to individual files in the filesystem
*/
static int exportMain(int argc, char **argv){
  char *zDb;
  char *zDir;
  sqlite3 *db;
  char *zSql;
  int rc;


  char *zErrMsg = 0;




  assert( strcmp(argv[1],"export")==0 );
  assert( argc>=3 );

  zDb = argv[2];
  if( argc!=4 ) fatalError("Usage: kvtest export DATABASE DIRECTORY");
  zDir = argv[3];












  if( pathType(zDir)!=PATH_DIR ){

    fatalError("object \"%s\" is not a directory", zDir);
  }
  rc = sqlite3_open(zDb, &db);
  if( rc ){
    fatalError("cannot open database \"%s\": %s", zDb, sqlite3_errmsg(db));
  }
  sqlite3_create_function(db, "writefile", 2, SQLITE_UTF8, 0,
                          writefileFunc, 0, 0);





  zSql = sqlite3_mprintf(
    "SELECT writefile(printf('%s/%%06d',k),v) FROM kv;",
    zDir
  );
  rc = sqlite3_exec(db, zSql, 0, 0, &zErrMsg);
  if( rc ) fatalError("database create failed: %s", zErrMsg);




























  sqlite3_free(zSql);
  sqlite3_close(db);

  printf("\n");
  return 0;
}

/*
** Read the content of file zName into memory obtained from sqlite3_malloc64()
** and return a pointer to the buffer. The caller is responsible for freeing 
................................................................................
** For convenience, a nul-terminator byte is always appended to the data read
** from the file before the buffer is returned. This byte is not included in
** the final value of (*pnByte), if applicable.
**
** NULL is returned if any error is encountered. The final value of *pnByte
** is undefined in this case.
*/
static unsigned char *readFile(const char *zName, int *pnByte){
  FILE *in;               /* FILE from which to read content of zName */
  sqlite3_int64 nIn;      /* Size of zName in bytes */
  size_t nRead;           /* Number of bytes actually read */
  unsigned char *pBuf;    /* Content read from disk */

  nIn = fileSize(zName);
  if( nIn<0 ) return 0;
................................................................................
  if( pBuf==0 ) return 0;
  nRead = fread(pBuf, (size_t)nIn, 1, in);
  fclose(in);
  if( nRead!=1 ){
    sqlite3_free(pBuf);
    return 0;
  }
  if( pnByte ) *pnByte = (int)nIn;
  return pBuf;
}

/*
** Overwrite a file with randomness.  Do not change the size of the
** file.
*/
static void updateFile(const char *zName, int *pnByte, int doFsync){
  FILE *out;              /* FILE from which to read content of zName */
  sqlite3_int64 sz;       /* Size of zName in bytes */
  size_t nWritten;        /* Number of bytes actually read */
  unsigned char *pBuf;    /* Content to store on disk */
  const char *zMode = "wb";   /* Mode for fopen() */

  sz = fileSize(zName);
  if( sz<0 ){
    fatalError("No such file: \"%s\"", zName);
  }
  *pnByte = (int)sz;
  if( sz==0 ) return;
  pBuf = sqlite3_malloc64( sz );
  if( pBuf==0 ){
    fatalError("Cannot allocate %lld bytes\n", sz);
  }
  sqlite3_randomness((int)sz, pBuf); 
#if defined(_WIN32)
................................................................................
  int bBlobApi = 0;           /* Use the incremental blob I/O API */
  int bStats = 0;             /* Print stats before exiting */
  int eOrder = ORDER_ASC;     /* Access order */
  int isUpdateTest = 0;       /* Do in-place updates rather than reads */
  int doIntegrityCk = 0;      /* Run PRAGMA integrity_check after the test */
  int noSync = 0;             /* Disable synchronous mode */
  int doFsync = 0;            /* Update disk files synchronously */


  sqlite3 *db = 0;            /* Database connection */
  sqlite3_stmt *pStmt = 0;    /* Prepared statement for SQL access */
  sqlite3_blob *pBlob = 0;    /* Handle for incremental Blob I/O */
  sqlite3_int64 tmStart;      /* Start time */
  sqlite3_int64 tmElapsed;    /* Elapsed time */
  int mmapSize = 0;           /* --mmap N argument */
  int nData = 0;              /* Bytes of data */
  sqlite3_int64 nTotal = 0;   /* Total data read */
  unsigned char *pData = 0;   /* Content of the blob */
  int nAlloc = 0;             /* Space allocated for pData[] */
  const char *zJMode = 0;     /* Journal mode */
  

  assert( strcmp(argv[1],"run")==0 );
  assert( argc>=3 );
  zDb = argv[2];
  eType = pathType(zDb);
  if( eType==PATH_OTHER ) fatalError("unknown object type: \"%s\"", zDb);
  if( eType==PATH_NEXIST ) fatalError("object does not exist: \"%s\"", zDb);
  for(i=3; i<argc; i++){
    char *z = argv[i];
    if( z[0]!='-' ) fatalError("unknown argument: \"%s\"", z);
    if( z[1]=='-' ) z++;













    if( strcmp(z, "-count")==0 ){
      if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]);
      nCount = integerValue(argv[++i]);
      if( nCount<1 ) fatalError("the --count must be positive");
      continue;

















    }
    if( strcmp(z, "-mmap")==0 ){
      if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]);
      mmapSize = integerValue(argv[++i]);
      if( nCount<0 ) fatalError("the --mmap must be non-negative");
      continue;
    }
    if( strcmp(z, "-max-id")==0 ){
      if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]);
      iMax = integerValue(argv[++i]);
      continue;
    }
    if( strcmp(z, "-start")==0 ){
      if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]);
      iKey = integerValue(argv[++i]);
      if( iKey<1 ) fatalError("the --start must be positive");
      continue;
    }
    if( strcmp(z, "-cache-size")==0 ){
      if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]);
      iCache = integerValue(argv[++i]);

      continue;
    }
    if( strcmp(z, "-jmode")==0 ){
      if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]);
      zJMode = argv[++i];

      continue;
    }
    if( strcmp(z, "-random")==0 ){
      eOrder = ORDER_RANDOM;
      continue;
    }
    if( strcmp(z, "-asc")==0 ){
      eOrder = ORDER_ASC;
      continue;
    }
    if( strcmp(z, "-desc")==0 ){
      eOrder = ORDER_DESC;
      continue;
    }
    if( strcmp(z, "-blob-api")==0 ){
      bBlobApi = 1;

      continue;
    }
    if( strcmp(z, "-stats")==0 ){
      bStats = 1;
      continue;
    }
    if( strcmp(z, "-update")==0 ){
      isUpdateTest = 1;
      continue;
    }
    if( strcmp(z, "-integrity-check")==0 ){
      doIntegrityCk = 1;
      continue;
    }
    if( strcmp(z, "-nosync")==0 ){
      noSync = 1;
      continue;
    }
    if( strcmp(z, "-fsync")==0 ){
      doFsync = 1;
      continue;
    }
    fatalError("unknown option: \"%s\"", argv[i]);
  }
  if( eType==PATH_DB ){
    /* Recover any prior crashes prior to starting the timer */
    sqlite3_open(zDb, &db);
    sqlite3_exec(db, "SELECT rowid FROM sqlite_master LIMIT 1", 0, 0, 0);
    sqlite3_close(db);

  }
  tmStart = timeOfDay();
  if( eType==PATH_DB ){
    char *zSql;
    rc = sqlite3_open(zDb, &db);
    if( rc ){
      fatalError("cannot open database \"%s\": %s", zDb, sqlite3_errmsg(db));
................................................................................
    }
    sqlite3_finalize(pStmt);
    pStmt = 0;
    if( zJMode ){
      zSql = sqlite3_mprintf("PRAGMA journal_mode=%Q", zJMode);
      sqlite3_exec(db, zSql, 0, 0, 0);
      sqlite3_free(zSql);



    }
    sqlite3_prepare_v2(db, "PRAGMA journal_mode", -1, &pStmt, 0);
    if( sqlite3_step(pStmt)==SQLITE_ROW ){
      zJMode = sqlite3_mprintf("%s", sqlite3_column_text(pStmt, 0));
    }else{
      zJMode = "???";
    }
................................................................................
      sqlite3_prepare_v2(db, "SELECT max(k) FROM kv", -1, &pStmt, 0);
      if( sqlite3_step(pStmt)==SQLITE_ROW ){
        iMax = sqlite3_column_int(pStmt, 0);
      }
      sqlite3_finalize(pStmt);
    }
    pStmt = 0;
    sqlite3_exec(db, "BEGIN", 0, 0, 0);
  }
  if( iMax<=0 ) iMax = 1000;
  for(i=0; i<nCount; i++){
    if( eType==PATH_DIR ){
      /* CASE 1: Reading blobs out of separate files */
      char *zKey;

      zKey = sqlite3_mprintf("%s/%06d", zDb, iKey);




      nData = 0;
      if( isUpdateTest ){
        updateFile(zKey, &nData, doFsync);
      }else{
        pData = readFile(zKey, &nData);
        sqlite3_free(pData);
      }
................................................................................
      }else{
        rc = sqlite3_blob_reopen(pBlob, iKey);
      }
      if( rc==SQLITE_OK ){
        nData = sqlite3_blob_bytes(pBlob);
        if( nAlloc<nData+1 ){
          nAlloc = nData+100;
          pData = sqlite3_realloc(pData, nAlloc);
        }
        if( pData==0 ) fatalError("cannot allocate %d bytes", nData+1);
        if( isUpdateTest ){
          sqlite3_randomness((int)nData, pData);
          rc = sqlite3_blob_write(pBlob, pData, nData, 0);
          if( rc!=SQLITE_OK ){
            fatalError("could not write the blob at %d: %s", iKey,
                      sqlite3_errmsg(db));
          }
        }else{
          rc = sqlite3_blob_read(pBlob, pData, nData, 0);
          if( rc!=SQLITE_OK ){
            fatalError("could not read the blob at %d: %s", iKey,
                      sqlite3_errmsg(db));
          }
        }
      }
    }else{
................................................................................
  if( nAlloc ) sqlite3_free(pData);
  if( pStmt ) sqlite3_finalize(pStmt);
  if( pBlob ) sqlite3_blob_close(pBlob);
  if( bStats ){
    display_stats(db, 0);
  }
  if( db ){
    sqlite3_exec(db, "COMMIT", 0, 0, 0);

    sqlite3_close(db);

  }

  tmElapsed = timeOfDay() - tmStart;




  if( nExtra ){
    printf("%d cycles due to %d misses\n", nCount, nExtra);
  }
  if( eType==PATH_DB ){
    printf("SQLite version: %s\n", sqlite3_libversion());
    if( doIntegrityCk ){
      sqlite3_open(zDb, &db);
      sqlite3_prepare_v2(db, "PRAGMA integrity_check", -1, &pStmt, 0);
      while( sqlite3_step(pStmt)==SQLITE_ROW ){
        printf("integrity-check: %s\n", sqlite3_column_text(pStmt, 0));
      }
      sqlite3_finalize(pStmt);
      sqlite3_close(db);

    }
  }
  printf("--count %d --max-id %d", nCount-nExtra, iMax);
  switch( eOrder ){
    case ORDER_RANDOM:  printf(" --random\n");  break;
    case ORDER_DESC:    printf(" --desc\n");    break;
    default:            printf(" --asc\n");     break;

"\n"
"        Generate a new test database file named DBFILE containing N\n"
"        BLOBs each of size M bytes.  The page size of the new database\n"
"        file will be X.  Additional options:\n"
"\n"
"           --variance V           Randomly vary M by plus or minus V\n"
"\n"
"   kvtest export DBFILE DIRECTORY [--tree]\n"
"\n"
"        Export all the blobs in the kv table of DBFILE into separate\n"
"        files in DIRECTORY.  DIRECTORY is created if it does not previously\n"
"        exist.  If the --tree option is used, then the blobs are written\n"
"        into a hierarchy of directories, using names like 00/00/00,\n"
"        00/00/01, 00/00/02, and so forth.  Without the --tree option, all\n"
"        files are in the top-level directory with names like 000000, 000001,\n"
"        000002, and so forth.\n"
"\n"
"   kvtest stat DBFILE [options]\n"
"\n"
"        Display summary information about DBFILE.  Options:\n"
"\n"
"           --vacuum               Run VACUUM on the database file\n"
"\n"
"   kvtest run DBFILE [options]\n"
"\n"
"        Run a performance test.  DBFILE can be either the name of a\n"
"        database or a directory containing sample files.  Options:\n"
"\n"
"           --asc                  Read blobs in ascending order\n"
................................................................................
"           --cache-size N         Database cache size\n"
"           --count N              Read N blobs\n"
"           --desc                 Read blobs in descending order\n"
"           --fsync                Synchronous file writes\n"
"           --integrity-check      Run \"PRAGMA integrity_check\" after test\n"
"           --max-id N             Maximum blob key to use\n"
"           --mmap N               Mmap as much as N bytes of DBFILE\n"
"           --multitrans           Each read or write in its own transaction\n"
"           --nocheckpoint         Omit the checkpoint on WAL mode writes\n"
"           --nosync               Set \"PRAGMA synchronous=OFF\"\n"
"           --jmode MODE           Set MODE journal mode prior to starting\n"
"           --random               Read blobs in a random order\n"
"           --start N              Start reading with this blob key\n"
"           --stats                Output operating stats before exiting\n"
"           --update               Do an overwrite test\n"
;

/* Reference resources used */
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
................................................................................
#include <string.h>
#include "sqlite3.h"

#ifndef _WIN32
# include <unistd.h>
#else
  /* Provide Windows equivalent for the needed parts of unistd.h */
# include <direct.h>
# include <io.h>
# define R_OK 2
# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
# define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
# define access _access
#endif

#include <stdint.h>


/*
** The following macros are used to cast pointers to integers and
** integers to pointers.  The way you do this varies from one compiler
** to the next, so we have developed the following set of #if statements
** to generate appropriate macros for a wide range of compilers.
**
................................................................................
** the ((void*)&((char*)0)[X]) construct.  But MSVC chokes on ((void*)(X)).
** So we have to define the macros in different ways depending on the
** compiler.
*/
#if defined(__PTRDIFF_TYPE__)  /* This case should work for GCC */
# define SQLITE_INT_TO_PTR(X)  ((void*)(__PTRDIFF_TYPE__)(X))
# define SQLITE_PTR_TO_INT(X)  ((sqlite3_int64)(__PTRDIFF_TYPE__)(X))
#else



# define SQLITE_INT_TO_PTR(X)  ((void*)(intptr_t)(X))
# define SQLITE_PTR_TO_INT(X)  ((sqlite3_int64)(intptr_t)(X))



#endif

/*
** Show thqe help text and quit.
*/
static void showHelp(void){
  fprintf(stdout, "%s", zHelp);
................................................................................
  return isNeg? -v : v;
}


/*
** Check the filesystem object zPath.  Determine what it is:
**
**    PATH_DIR     A single directory holding many files
**    PATH_TREE    A directory hierarchy with files at the leaves
**    PATH_DB      An SQLite database
**    PATH_NEXIST  Does not exist
**    PATH_OTHER   Something else
**
** PATH_DIR means all of the separate files are grouped together
** into a single directory with names like 000000, 000001, 000002, and
** so forth.  PATH_TREE means there is a hierarchy of directories so
** that no single directory has too many entries.  The files have names
** like 00/00/00, 00/00/01, 00/00/02 and so forth.  The decision between
** PATH_DIR and PATH_TREE is determined by the presence of a subdirectory
** named "00" at the top-level.
*/
#define PATH_DIR     1
#define PATH_TREE    2
#define PATH_DB      3
#define PATH_NEXIST  0
#define PATH_OTHER   99
static int pathType(const char *zPath){
  struct stat x;
  int rc;
  if( access(zPath,R_OK) ) return PATH_NEXIST;
  memset(&x, 0, sizeof(x));
  rc = stat(zPath, &x);
  if( rc<0 ) return PATH_OTHER;
  if( S_ISDIR(x.st_mode) ){
    char *zLayer1 = sqlite3_mprintf("%s/00", zPath);
    memset(&x, 0, sizeof(x));
    rc = stat(zLayer1, &x);
    sqlite3_free(zLayer1);
    if( rc<0 ) return PATH_DIR;
    if( S_ISDIR(x.st_mode) ) return PATH_TREE;
    return PATH_DIR;
  }
  if( (x.st_size%512)==0 ) return PATH_DB;
  return PATH_OTHER;
}

/*
** Return the size of a file in bytes.  Or return -1 if the
** named object is not a regular file or does not exist.
................................................................................
*/
static int statMain(int argc, char **argv){
  char *zDb;
  int i, rc;
  sqlite3 *db;
  char *zSql;
  sqlite3_stmt *pStmt;
  int doVacuum = 0;

  assert( strcmp(argv[1],"stat")==0 );
  assert( argc>=3 );
  zDb = argv[2];
  for(i=3; i<argc; i++){
    char *z = argv[i];
    if( z[0]!='-' ) fatalError("unknown argument: \"%s\"", z);
    if( z[1]=='-' ) z++;
    if( strcmp(z, "-vacuum")==0 ){
      doVacuum = 1;
      continue;
    }
    fatalError("unknown option: \"%s\"", argv[i]);
  }
  rc = sqlite3_open(zDb, &db);
  if( rc ){
    fatalError("cannot open database \"%s\": %s", zDb, sqlite3_errmsg(db));
  }
  if( doVacuum ){
    printf("Vacuuming...."); fflush(stdout);
    sqlite3_exec(db, "VACUUM", 0, 0, 0);
    printf("       done\n");
  }
  zSql = sqlite3_mprintf(
    "SELECT count(*), min(length(v)), max(length(v)), avg(length(v))"
    "  FROM kv"
  );
  rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
  if( rc ) fatalError("cannot prepare SQL [%s]: %s", zSql, sqlite3_errmsg(db));
  sqlite3_free(zSql);
................................................................................
  zSql = sqlite3_mprintf("PRAGMA page_count");
  rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
  if( rc ) fatalError("cannot prepare SQL [%s]: %s", zSql, sqlite3_errmsg(db));
  sqlite3_free(zSql);
  if( sqlite3_step(pStmt)==SQLITE_ROW ){
    printf("Page-count:         %8d\n", sqlite3_column_int(pStmt, 0));
  }
  sqlite3_finalize(pStmt);
  zSql = sqlite3_mprintf("PRAGMA freelist_count");
  rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
  if( rc ) fatalError("cannot prepare SQL [%s]: %s", zSql, sqlite3_errmsg(db));
  sqlite3_free(zSql);
  if( sqlite3_step(pStmt)==SQLITE_ROW ){
    printf("Freelist-count:     %8d\n", sqlite3_column_int(pStmt, 0));
  }
  sqlite3_finalize(pStmt);
  rc = sqlite3_prepare_v2(db, "PRAGMA integrity_check(10)", -1, &pStmt, 0);
  if( rc ) fatalError("cannot prepare integrity check: %s", sqlite3_errmsg(db));
  while( sqlite3_step(pStmt)==SQLITE_ROW ){
    printf("Integrity-check:    %s\n", sqlite3_column_text(pStmt, 0));
  }
  sqlite3_finalize(pStmt);
  sqlite3_close(db);
  return 0;
}


















/*
**      remember(V,PTR)
**
** Return the integer value V.  Also save the value of V in a
** C-language variable whose address is PTR.
*/
static void rememberFunc(
................................................................................
  sqlite3_int64 ptr;
  assert( argc==2 );
  v = sqlite3_value_int64(argv[0]);
  ptr = sqlite3_value_int64(argv[1]);
  *(sqlite3_int64*)SQLITE_INT_TO_PTR(ptr) = v;
  sqlite3_result_int64(pCtx, v);
}

/*
** Make sure a directory named zDir exists.
*/
static void kvtest_mkdir(const char *zDir){
#if defined(_WIN32)
  (void)mkdir(zDir);
#else
  (void)mkdir(zDir, 0755);
#endif
}

/*
** Export the kv table to individual files in the filesystem
*/
static int exportMain(int argc, char **argv){
  char *zDb;
  char *zDir;
  sqlite3 *db;
  sqlite3_stmt *pStmt;
  int rc;
  int ePathType;
  int nFN;
  char *zFN;
  char *zTail;
  size_t nWrote;
  int i;

  assert( strcmp(argv[1],"export")==0 );
  assert( argc>=3 );
  if( argc<4 ) fatalError("Usage: kvtest export DATABASE DIRECTORY [OPTIONS]");
  zDb = argv[2];

  zDir = argv[3];
  kvtest_mkdir(zDir);
  for(i=4; i<argc; i++){
    const char *z = argv[i];
    if( z[0]=='-' && z[1]=='-' ) z++;
    if( strcmp(z,"-tree")==0 ){
      zFN = sqlite3_mprintf("%s/00", zDir);
      kvtest_mkdir(zFN);
      sqlite3_free(zFN);
      continue;
    }
    fatalError("unknown argument: \"%s\"\n", argv[i]);
  }
  ePathType = pathType(zDir);
  if( ePathType!=PATH_DIR && ePathType!=PATH_TREE ){
    fatalError("object \"%s\" is not a directory", zDir);
  }
  rc = sqlite3_open(zDb, &db);
  if( rc ){
    fatalError("cannot open database \"%s\": %s", zDb, sqlite3_errmsg(db));
  }


  rc = sqlite3_prepare_v2(db, "SELECT k, v FROM kv ORDER BY k", -1, &pStmt, 0);
  if( rc ){
    fatalError("prepare_v2 failed: %s\n", sqlite3_errmsg(db));
  }
  nFN = (int)strlen(zDir);
  zFN = sqlite3_mprintf("%s/00/00/00.extra---------------------", zDir);





  if( zFN==0 ){
    fatalError("malloc failed\n");
  }
  zTail = zFN + nFN + 1;
  while( sqlite3_step(pStmt)==SQLITE_ROW ){
    int iKey = sqlite3_column_int(pStmt, 0);
    sqlite3_int64 nData = sqlite3_column_bytes(pStmt, 1);
    const void *pData = sqlite3_column_blob(pStmt, 1);
    FILE *out;
    if( ePathType==PATH_DIR ){
      sqlite3_snprintf(20, zTail, "%06d", iKey);
    }else{
      sqlite3_snprintf(20, zTail, "%02d", iKey/10000);
      kvtest_mkdir(zFN);
      sqlite3_snprintf(20, zTail, "%02d/%02d", iKey/10000, (iKey/100)%100);
      kvtest_mkdir(zFN);
      sqlite3_snprintf(20, zTail, "%02d/%02d/%02d",
                       iKey/10000, (iKey/100)%100, iKey%100);
    }
    out = fopen(zFN, "wb");      
    nWrote = fwrite(pData, 1, nData, out);
    fclose(out);
    printf("\r%s   ", zTail); fflush(stdout);
    if( nWrote!=nData ){
      fatalError("Wrote only %d of %d bytes to %s\n",
                  (int)nWrote, nData, zFN);
    }
  }
  sqlite3_finalize(pStmt);
  sqlite3_close(db);
  sqlite3_free(zFN);
  printf("\n");
  return 0;
}

/*
** Read the content of file zName into memory obtained from sqlite3_malloc64()
** and return a pointer to the buffer. The caller is responsible for freeing 
................................................................................
** For convenience, a nul-terminator byte is always appended to the data read
** from the file before the buffer is returned. This byte is not included in
** the final value of (*pnByte), if applicable.
**
** NULL is returned if any error is encountered. The final value of *pnByte
** is undefined in this case.
*/
static unsigned char *readFile(const char *zName, sqlite3_int64 *pnByte){
  FILE *in;               /* FILE from which to read content of zName */
  sqlite3_int64 nIn;      /* Size of zName in bytes */
  size_t nRead;           /* Number of bytes actually read */
  unsigned char *pBuf;    /* Content read from disk */

  nIn = fileSize(zName);
  if( nIn<0 ) return 0;
................................................................................
  if( pBuf==0 ) return 0;
  nRead = fread(pBuf, (size_t)nIn, 1, in);
  fclose(in);
  if( nRead!=1 ){
    sqlite3_free(pBuf);
    return 0;
  }
  if( pnByte ) *pnByte = nIn;
  return pBuf;
}

/*
** Overwrite a file with randomness.  Do not change the size of the
** file.
*/
static void updateFile(const char *zName, sqlite3_int64 *pnByte, int doFsync){
  FILE *out;              /* FILE from which to read content of zName */
  sqlite3_int64 sz;       /* Size of zName in bytes */
  size_t nWritten;        /* Number of bytes actually read */
  unsigned char *pBuf;    /* Content to store on disk */
  const char *zMode = "wb";   /* Mode for fopen() */

  sz = fileSize(zName);
  if( sz<0 ){
    fatalError("No such file: \"%s\"", zName);
  }
  *pnByte = sz;
  if( sz==0 ) return;
  pBuf = sqlite3_malloc64( sz );
  if( pBuf==0 ){
    fatalError("Cannot allocate %lld bytes\n", sz);
  }
  sqlite3_randomness((int)sz, pBuf); 
#if defined(_WIN32)
................................................................................
  int bBlobApi = 0;           /* Use the incremental blob I/O API */
  int bStats = 0;             /* Print stats before exiting */
  int eOrder = ORDER_ASC;     /* Access order */
  int isUpdateTest = 0;       /* Do in-place updates rather than reads */
  int doIntegrityCk = 0;      /* Run PRAGMA integrity_check after the test */
  int noSync = 0;             /* Disable synchronous mode */
  int doFsync = 0;            /* Update disk files synchronously */
  int doMultiTrans = 0;       /* Each operation in its own transaction */
  int noCheckpoint = 0;       /* Omit the checkpoint in WAL mode */
  sqlite3 *db = 0;            /* Database connection */
  sqlite3_stmt *pStmt = 0;    /* Prepared statement for SQL access */
  sqlite3_blob *pBlob = 0;    /* Handle for incremental Blob I/O */
  sqlite3_int64 tmStart;      /* Start time */
  sqlite3_int64 tmElapsed;    /* Elapsed time */
  int mmapSize = 0;           /* --mmap N argument */
  sqlite3_int64 nData = 0;    /* Bytes of data */
  sqlite3_int64 nTotal = 0;   /* Total data read */
  unsigned char *pData = 0;   /* Content of the blob */
  sqlite3_int64 nAlloc = 0;   /* Space allocated for pData[] */
  const char *zJMode = 0;     /* Journal mode */
  

  assert( strcmp(argv[1],"run")==0 );
  assert( argc>=3 );
  zDb = argv[2];
  eType = pathType(zDb);
  if( eType==PATH_OTHER ) fatalError("unknown object type: \"%s\"", zDb);
  if( eType==PATH_NEXIST ) fatalError("object does not exist: \"%s\"", zDb);
  for(i=3; i<argc; i++){
    char *z = argv[i];
    if( z[0]!='-' ) fatalError("unknown argument: \"%s\"", z);
    if( z[1]=='-' ) z++;
    if( strcmp(z, "-asc")==0 ){
      eOrder = ORDER_ASC;
      continue;
    }
    if( strcmp(z, "-blob-api")==0 ){
      bBlobApi = 1;
      continue;
    }
    if( strcmp(z, "-cache-size")==0 ){
      if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]);
      iCache = integerValue(argv[++i]);
      continue;
    }
    if( strcmp(z, "-count")==0 ){
      if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]);
      nCount = integerValue(argv[++i]);
      if( nCount<1 ) fatalError("the --count must be positive");
      continue;
    }
    if( strcmp(z, "-desc")==0 ){
      eOrder = ORDER_DESC;
      continue;
    }
    if( strcmp(z, "-fsync")==0 ){
      doFsync = 1;
      continue;
    }
    if( strcmp(z, "-integrity-check")==0 ){
      doIntegrityCk = 1;
      continue;
    }
    if( strcmp(z, "-jmode")==0 ){
      if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]);
      zJMode = argv[++i];
      continue;
    }
    if( strcmp(z, "-mmap")==0 ){
      if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]);
      mmapSize = integerValue(argv[++i]);
      if( nCount<0 ) fatalError("the --mmap must be non-negative");
      continue;
    }
    if( strcmp(z, "-max-id")==0 ){
      if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]);
      iMax = integerValue(argv[++i]);
      continue;
    }
    if( strcmp(z, "-multitrans")==0 ){
      doMultiTrans = 1;


      continue;
    }
    if( strcmp(z, "-nocheckpoint")==0 ){


      noCheckpoint = 1;
      continue;
    }
    if( strcmp(z, "-nosync")==0 ){


      noSync = 1;
      continue;
    }
    if( strcmp(z, "-random")==0 ){
      eOrder = ORDER_RANDOM;
      continue;
    }
    if( strcmp(z, "-start")==0 ){
      if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]);
      iKey = integerValue(argv[++i]);







      if( iKey<1 ) fatalError("the --start must be positive");
      continue;
    }
    if( strcmp(z, "-stats")==0 ){
      bStats = 1;
      continue;
    }
    if( strcmp(z, "-update")==0 ){
      isUpdateTest = 1;
      continue;
    }












    fatalError("unknown option: \"%s\"", argv[i]);
  }
  if( eType==PATH_DB ){
    /* Recover any prior crashes prior to starting the timer */
    sqlite3_open(zDb, &db);
    sqlite3_exec(db, "SELECT rowid FROM sqlite_master LIMIT 1", 0, 0, 0);
    sqlite3_close(db);
    db = 0;
  }
  tmStart = timeOfDay();
  if( eType==PATH_DB ){
    char *zSql;
    rc = sqlite3_open(zDb, &db);
    if( rc ){
      fatalError("cannot open database \"%s\": %s", zDb, sqlite3_errmsg(db));
................................................................................
    }
    sqlite3_finalize(pStmt);
    pStmt = 0;
    if( zJMode ){
      zSql = sqlite3_mprintf("PRAGMA journal_mode=%Q", zJMode);
      sqlite3_exec(db, zSql, 0, 0, 0);
      sqlite3_free(zSql);
      if( noCheckpoint ){
        sqlite3_exec(db, "PRAGMA wal_autocheckpoint=0", 0, 0, 0);
      }
    }
    sqlite3_prepare_v2(db, "PRAGMA journal_mode", -1, &pStmt, 0);
    if( sqlite3_step(pStmt)==SQLITE_ROW ){
      zJMode = sqlite3_mprintf("%s", sqlite3_column_text(pStmt, 0));
    }else{
      zJMode = "???";
    }
................................................................................
      sqlite3_prepare_v2(db, "SELECT max(k) FROM kv", -1, &pStmt, 0);
      if( sqlite3_step(pStmt)==SQLITE_ROW ){
        iMax = sqlite3_column_int(pStmt, 0);
      }
      sqlite3_finalize(pStmt);
    }
    pStmt = 0;
    if( !doMultiTrans ) sqlite3_exec(db, "BEGIN", 0, 0, 0);
  }
  if( iMax<=0 ) iMax = 1000;
  for(i=0; i<nCount; i++){
    if( eType==PATH_DIR || eType==PATH_TREE ){
      /* CASE 1: Reading or writing blobs out of separate files */
      char *zKey;
      if( eType==PATH_DIR ){
        zKey = sqlite3_mprintf("%s/%06d", zDb, iKey);
      }else{
        zKey = sqlite3_mprintf("%s/%02d/%02d/%02d", zDb, iKey/10000,
                               (iKey/100)%100, iKey%100);
      }
      nData = 0;
      if( isUpdateTest ){
        updateFile(zKey, &nData, doFsync);
      }else{
        pData = readFile(zKey, &nData);
        sqlite3_free(pData);
      }
................................................................................
      }else{
        rc = sqlite3_blob_reopen(pBlob, iKey);
      }
      if( rc==SQLITE_OK ){
        nData = sqlite3_blob_bytes(pBlob);
        if( nAlloc<nData+1 ){
          nAlloc = nData+100;
          pData = sqlite3_realloc64(pData, nAlloc);
        }
        if( pData==0 ) fatalError("cannot allocate %d bytes", nData+1);
        if( isUpdateTest ){
          sqlite3_randomness((int)nData, pData);
          rc = sqlite3_blob_write(pBlob, pData, (int)nData, 0);
          if( rc!=SQLITE_OK ){
            fatalError("could not write the blob at %d: %s", iKey,
                      sqlite3_errmsg(db));
          }
        }else{
          rc = sqlite3_blob_read(pBlob, pData, (int)nData, 0);
          if( rc!=SQLITE_OK ){
            fatalError("could not read the blob at %d: %s", iKey,
                      sqlite3_errmsg(db));
          }
        }
      }
    }else{
................................................................................
  if( nAlloc ) sqlite3_free(pData);
  if( pStmt ) sqlite3_finalize(pStmt);
  if( pBlob ) sqlite3_blob_close(pBlob);
  if( bStats ){
    display_stats(db, 0);
  }
  if( db ){
    if( !doMultiTrans ) sqlite3_exec(db, "COMMIT", 0, 0, 0);
    if( !noCheckpoint ){
      sqlite3_close(db);
      db = 0;
    }
  }
  tmElapsed = timeOfDay() - tmStart;
  if( db && noCheckpoint ){
    sqlite3_close(db);
    db = 0;
  }
  if( nExtra ){
    printf("%d cycles due to %d misses\n", nCount, nExtra);
  }
  if( eType==PATH_DB ){
    printf("SQLite version: %s\n", sqlite3_libversion());
    if( doIntegrityCk ){
      sqlite3_open(zDb, &db);
      sqlite3_prepare_v2(db, "PRAGMA integrity_check", -1, &pStmt, 0);
      while( sqlite3_step(pStmt)==SQLITE_ROW ){
        printf("integrity-check: %s\n", sqlite3_column_text(pStmt, 0));
      }
      sqlite3_finalize(pStmt);
      sqlite3_close(db);
      db = 0;
    }
  }
  printf("--count %d --max-id %d", nCount-nExtra, iMax);
  switch( eOrder ){
    case ORDER_RANDOM:  printf(" --random\n");  break;
    case ORDER_DESC:    printf(" --desc\n");    break;
    default:            printf(" --asc\n");     break;

      set fd [open $path w]
      puts -nonewline $fd [string repeat 1 $sz]
      close $fd
    }
  } {}

  set pwd [pwd]

  do_execsql_test 3.5 {

    SELECT path, size FROM fstree WHERE path GLOB $pwd || '/subdir/*' ORDER BY 1
  } [list \
    "$pwd/subdir/x1.txt" 143 \
    "$pwd/subdir/x2.txt" 153 \
  ]
  do_execsql_test 3.6 {

    SELECT path, size FROM fstree WHERE path LIKE $pwd || '/subdir/%' ORDER BY 1
  } [list \
    "$pwd/subdir/x1.txt" 143 \
    "$pwd/subdir/x2.txt" 153 \
  ]
  do_execsql_test 3.7 {
    SELECT sum(size) FROM fstree WHERE path LIKE $pwd || '/subdir/%'
  } 296
  do_execsql_test 3.8 {
    SELECT size FROM fstree WHERE path = $pwd || '/subdir/x1.txt'
  } 143

}



finish_test

      set fd [open $path w]
      puts -nonewline $fd [string repeat 1 $sz]
      close $fd
    }
  } {}

  set pwd [pwd]
  if {![string match {*[_%]*} $pwd]} {
    do_execsql_test 3.5 {
      SELECT path, size FROM fstree 
       WHERE path GLOB $pwd || '/subdir/*' ORDER BY 1
    } [list \
      "$pwd/subdir/x1.txt" 143 \
      "$pwd/subdir/x2.txt" 153 \
    ]
    do_execsql_test 3.6 {
      SELECT path, size FROM fstree
       WHERE path LIKE $pwd || '/subdir/%' ORDER BY 1
    } [list \
      "$pwd/subdir/x1.txt" 143 \
      "$pwd/subdir/x2.txt" 153 \
    ]
    do_execsql_test 3.7 {
      SELECT sum(size) FROM fstree WHERE path LIKE $pwd || '/subdir/%'
    } 296
    do_execsql_test 3.8 {
      SELECT size FROM fstree WHERE path = $pwd || '/subdir/x1.txt'
    } 143
  }

}


finish_test

  # total_pages_percent: Pages consumed as a percentage of the file.
  # storage: Bytes consumed.
  # payload_percent: Payload bytes used as a percentage of $storage.
  # total_unused: Unused bytes on pages.
  # avg_payload: Average payload per btree entry.
  # avg_fanout: Average fanout for internal pages.
  # avg_unused: Average unused bytes per btree entry.

  # ovfl_cnt_percent: Percentage of btree entries that use overflow pages.
  #
  set total_pages [expr {$leaf_pages+$int_pages+$ovfl_pages}]
  set total_pages_percent [percent $total_pages $file_pgcnt]
  set storage [expr {$total_pages*$pageSize}]
  set payload_percent [percent $payload $storage {of storage consumed}]
  set total_unused [expr {$ovfl_unused+$int_unused+$leaf_unused}]
  set avg_payload [divide $payload $nentry]
  set avg_unused [divide $total_unused $nentry]




  if {$int_pages>0} {
    # TODO: Is this formula correct?
    set nTab [mem eval "
      SELECT count(*) FROM (
          SELECT DISTINCT tblname FROM space_used WHERE $where AND is_index=0
      )
    "]
................................................................................
  if {$compressed_size!=$storage} {
    set compressed_size [expr {$compressed_size+$compressOverhead*$total_pages}]
    set pct [expr {$compressed_size*100.0/$storage}]
    set pct [format {%5.1f%%} $pct]
    statline {Bytes used after compression} $compressed_size $pct
  }
  statline {Bytes of payload} $payload $payload_percent

  if {$cnt==1} {statline {B-tree depth} $depth}
  statline {Average payload per entry} $avg_payload
  statline {Average unused bytes per entry} $avg_unused

  if {[info exists avg_fanout]} {
    statline {Average fanout} $avg_fanout
  }
  if {$showFrag && $total_pages>1} {
    set fragmentation [percent $gap_cnt [expr {$total_pages-1}]]
    statline {Non-sequential pages} $gap_cnt $fragmentation
  }
................................................................................
Bytes of payload

    The amount of payload stored under this category.  Payload is the data
    part of table entries and the key part of index entries.  The percentage
    at the right is the bytes of payload divided by the bytes of storage 
    consumed.










Average payload per entry

    The average amount of payload on each entry.  This is just the bytes of
    payload divided by the number of entries.

Average unused bytes per entry

  # total_pages_percent: Pages consumed as a percentage of the file.
  # storage: Bytes consumed.
  # payload_percent: Payload bytes used as a percentage of $storage.
  # total_unused: Unused bytes on pages.
  # avg_payload: Average payload per btree entry.
  # avg_fanout: Average fanout for internal pages.
  # avg_unused: Average unused bytes per btree entry.
  # avg_meta: Average metadata overhead per entry.
  # ovfl_cnt_percent: Percentage of btree entries that use overflow pages.
  #
  set total_pages [expr {$leaf_pages+$int_pages+$ovfl_pages}]
  set total_pages_percent [percent $total_pages $file_pgcnt]
  set storage [expr {$total_pages*$pageSize}]
  set payload_percent [percent $payload $storage {of storage consumed}]
  set total_unused [expr {$ovfl_unused+$int_unused+$leaf_unused}]
  set avg_payload [divide $payload $nentry]
  set avg_unused [divide $total_unused $nentry]
  set total_meta [expr {$storage - $payload - $total_unused}]
  set total_meta [expr {$total_meta + 4*($ovfl_pages - $ovfl_cnt)}]
  set meta_percent [percent $total_meta $storage {of metadata}]
  set avg_meta [divide $total_meta $nentry]
  if {$int_pages>0} {
    # TODO: Is this formula correct?
    set nTab [mem eval "
      SELECT count(*) FROM (
          SELECT DISTINCT tblname FROM space_used WHERE $where AND is_index=0
      )
    "]
................................................................................
  if {$compressed_size!=$storage} {
    set compressed_size [expr {$compressed_size+$compressOverhead*$total_pages}]
    set pct [expr {$compressed_size*100.0/$storage}]
    set pct [format {%5.1f%%} $pct]
    statline {Bytes used after compression} $compressed_size $pct
  }
  statline {Bytes of payload} $payload $payload_percent
  statline {Bytes of metadata} $total_meta $meta_percent
  if {$cnt==1} {statline {B-tree depth} $depth}
  statline {Average payload per entry} $avg_payload
  statline {Average unused bytes per entry} $avg_unused
  statline {Average metadata per entry} $avg_meta
  if {[info exists avg_fanout]} {
    statline {Average fanout} $avg_fanout
  }
  if {$showFrag && $total_pages>1} {
    set fragmentation [percent $gap_cnt [expr {$total_pages-1}]]
    statline {Non-sequential pages} $gap_cnt $fragmentation
  }
................................................................................
Bytes of payload

    The amount of payload stored under this category.  Payload is the data
    part of table entries and the key part of index entries.  The percentage
    at the right is the bytes of payload divided by the bytes of storage 
    consumed.

Bytes of metadata

    The amount of formatting and structural information stored on for the
    table or index.  Metadata includes the btree page header, the cell pointer
    array, the size field for each cell, the left child pointer or non-leaf
    cells, the overflow pointers for overflow cells, and the rowid value for
    rowid table cells.  In other words, metadata is everything that is not
    unused space and that is not content.

Average payload per entry

    The average amount of payload on each entry.  This is just the bytes of
    payload divided by the number of entries.

Average unused bytes per entry