Fossil

  "      trigger               Like \"full\" but also show trigger bytecode",
  ".excel                   Display the output of next command in a spreadsheet",
  ".exit ?CODE?             Exit this program with return-code CODE",
  ".expert                  EXPERIMENTAL. Suggest indexes for specified queries",
/* Because explain mode comes on automatically now, the ".explain" mode
** is removed from the help screen.  It is still supported for legacy, however */
/*".explain ?on|off|auto?   Turn EXPLAIN output mode on or off or to automatic",*/
  ".filectrl CMD ...        Run various sqlite3_file_control() operations",
  "                           Run \".filectrl\" with no arguments for details",
  ".fullschema ?--indent?   Show schema and the content of sqlite_stat tables",
  ".headers on|off          Turn display of headers on or off",
  ".help ?-all? ?PATTERN?   Show help text for PATTERN",
  ".import FILE TABLE       Import data from FILE into TABLE",
#ifndef SQLITE_OMIT_TEST_CONTROL
  ".imposter INDEX TABLE    Create imposter table TABLE on index INDEX",
#endif

  ".show                    Show the current values for various settings",
  ".stats ?on|off?          Show stats or turn stats on or off",
#ifndef SQLITE_NOHAVE_SYSTEM
  ".system CMD ARGS...      Run CMD ARGS... in a system shell",
#endif
  ".tables ?TABLE?          List names of tables matching LIKE pattern TABLE",
  ".testcase NAME           Begin redirecting output to 'testcase-out.txt'",
  ".testctrl CMD ...        Run various sqlite3_test_control() operations",
  "                           Run \".testctrl\" with no arguments for details",
  ".timeout MS              Try opening locked tables for MS milliseconds",
  ".timer on|off            Turn SQL timer on or off",
#ifndef SQLITE_OMIT_TRACE
  ".trace ?OPTIONS?         Output each SQL statement as it is run",
  "    FILE                    Send output to FILE",
  "    stdout                  Send output to stdout",
  "    stderr                  Send output to stderr",

      zCmd = sqlite3_mprintf("%s %s", zXdgOpenCmd, p->zTempFile);
      if( system(zCmd) ){
        utf8_printf(stderr, "Failed: [%s]\n", zCmd);
      }
      sqlite3_free(zCmd);
      outputModePop(p);
      p->doXdgOpen = 0;
      sqlite3_sleep(100);
    }
#endif /* !defined(SQLITE_NOHAVE_SYSTEM) */
  }
  p->outfile[0] = 0;
  p->out = stdout;
}

#ifndef SQLITE_OMIT_VIRTUALTABLE
  if( c=='e' && strncmp(azArg[0], "expert", n)==0 ){
    open_db(p, 0);
    expertDotCommand(p, azArg, nArg);
  }else
#endif

  if( c=='f' && strncmp(azArg[0], "filectrl", n)==0 ){
    static const struct {
       const char *zCtrlName;   /* Name of a test-control option */
       int ctrlCode;            /* Integer code for that option */
       const char *zUsage;      /* Usage notes */
    } aCtrl[] = {
      { "size_limit",     SQLITE_FCNTL_SIZE_LIMIT,      "[LIMIT]"        },
      { "chunk_size",     SQLITE_FCNTL_CHUNK_SIZE,      "SIZE"           },
   /* { "win32_av_retry", SQLITE_FCNTL_WIN32_AV_RETRY,  "COUNT DELAY"    },*/
      { "persist_wal",    SQLITE_FCNTL_PERSIST_WAL,     "[BOOLEAN]"      },
      { "psow",       SQLITE_FCNTL_POWERSAFE_OVERWRITE, "[BOOLEAN]"      },
   /* { "pragma",         SQLITE_FCNTL_PRAGMA,          "NAME ARG"       },*/
      { "tempfilename",   SQLITE_FCNTL_TEMPFILENAME,    ""               },
      { "has_moved",      SQLITE_FCNTL_HAS_MOVED,       ""               },  
      { "lock_timeout",   SQLITE_FCNTL_LOCK_TIMEOUT,    "MILLISEC"       },
    };
    int filectrl = -1;
    int iCtrl = -1;
    sqlite3_int64 iRes;  /* Integer result to display if rc2==1 */
    int isOk = 0;        /* 0: usage  1: %lld  2: no-result */
    int n2, i;
    const char *zCmd = 0;

    open_db(p, 0);
    zCmd = nArg>=2 ? azArg[1] : "help";

    /* The argument can optionally begin with "-" or "--" */
    if( zCmd[0]=='-' && zCmd[1] ){
      zCmd++;
      if( zCmd[0]=='-' && zCmd[1] ) zCmd++;
    }

    /* --help lists all file-controls */
    if( strcmp(zCmd,"help")==0 ){
      utf8_printf(p->out, "Available file-controls:\n");
      for(i=0; i<ArraySize(aCtrl); i++){
        utf8_printf(p->out, "  .filectrl %s %s\n",
                    aCtrl[i].zCtrlName, aCtrl[i].zUsage);
      }
      rc = 1;
      goto meta_command_exit;
    }

    /* convert filectrl text option to value. allow any unique prefix
    ** of the option name, or a numerical value. */
    n2 = strlen30(zCmd);
    for(i=0; i<ArraySize(aCtrl); i++){
      if( strncmp(zCmd, aCtrl[i].zCtrlName, n2)==0 ){
        if( filectrl<0 ){
          filectrl = aCtrl[i].ctrlCode;
          iCtrl = i;
        }else{
          utf8_printf(stderr, "Error: ambiguous file-control: \"%s\"\n"
                              "Use \".filectrl --help\" for help\n", zCmd);
          rc = 1;
          goto meta_command_exit;
        }
      }
    }
    if( filectrl<0 ){
      utf8_printf(stderr,"Error: unknown file-control: %s\n"
                         "Use \".filectrl --help\" for help\n", zCmd);
    }else{
      switch(filectrl){
        case SQLITE_FCNTL_SIZE_LIMIT: {
          if( nArg!=2 && nArg!=3 ) break;
          iRes = nArg==3 ? integerValue(azArg[2]) : -1;
          sqlite3_file_control(p->db, 0, SQLITE_FCNTL_SIZE_LIMIT, &iRes);
          isOk = 1;
          break;
        }
        case SQLITE_FCNTL_LOCK_TIMEOUT:
        case SQLITE_FCNTL_CHUNK_SIZE: {
          int x;
          if( nArg!=3 ) break;
          x = (int)integerValue(azArg[2]);
          sqlite3_file_control(p->db, 0, filectrl, &x);
          isOk = 2;
          break;
        }
        case SQLITE_FCNTL_PERSIST_WAL:
        case SQLITE_FCNTL_POWERSAFE_OVERWRITE: {
          int x;
          if( nArg!=2 && nArg!=3 ) break;
          x = nArg==3 ? booleanValue(azArg[2]) : -1;
          sqlite3_file_control(p->db, 0, filectrl, &x);
          iRes = x;
          isOk = 1;
          break;
        }
        case SQLITE_FCNTL_HAS_MOVED: {
          int x;
          if( nArg!=2 ) break;
          sqlite3_file_control(p->db, 0, filectrl, &x);
          iRes = x;
          isOk = 1;
          break;
        }
        case SQLITE_FCNTL_TEMPFILENAME: {
          char *z = 0;
          if( nArg!=2 ) break;
          sqlite3_file_control(p->db, 0, filectrl, &z);
          if( z ){
            utf8_printf(p->out, "%s\n", z);
            sqlite3_free(z);
          }
          isOk = 2;
          break;
        }
      }
    }
    if( isOk==0 && iCtrl>=0 ){
      utf8_printf(p->out, "Usage: .filectrl %s %s\n", zCmd,aCtrl[iCtrl].zUsage);
      rc = 1;
    }else if( isOk==1 ){
      raw_printf(p->out, "%lld\n", iRes);
    }
  }else

  if( c=='f' && strncmp(azArg[0], "fullschema", n)==0 ){
    ShellState data;
    char *zErrMsg = 0;
    int doStats = 0;
    memcpy(&data, p, sizeof(data));
    data.showHeader = 0;

**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.29.0"
#define SQLITE_VERSION_NUMBER 3029000
#define SQLITE_SOURCE_ID      "2019-06-05 14:29:53 7b3a99fce8b4a757f2b2ef2f0b02d68566f2528d9ae1e30628522717f872466c"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros

#if defined(SQLITE_ENABLE_MULTITHREADED_CHECKS) && !defined(SQLITE_MUTEX_OMIT)
SQLITE_PRIVATE void sqlite3MutexWarnOnContention(sqlite3_mutex*);
#else
# define sqlite3MutexWarnOnContention(x)
#endif

#ifndef SQLITE_OMIT_FLOATING_POINT
# define EXP754 (((u64)0x7ff)<<52)
# define MAN754 ((((u64)1)<<52)-1)
# define IsNaN(X) (((X)&EXP754)==EXP754 && ((X)&MAN754)!=0)
SQLITE_PRIVATE   int sqlite3IsNaN(double);
#else
# define IsNaN(X)         0
# define sqlite3IsNaN(X)  0
#endif

/*
** An instance of the following structure holds information about SQL
** functions arguments that are the parameters to the printf() function.
*/

SQLITE_PRIVATE void sqlite3Detach(Parse*, Expr*);
SQLITE_PRIVATE void sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*);
SQLITE_PRIVATE int sqlite3FixSrcList(DbFixer*, SrcList*);
SQLITE_PRIVATE int sqlite3FixSelect(DbFixer*, Select*);
SQLITE_PRIVATE int sqlite3FixExpr(DbFixer*, Expr*);
SQLITE_PRIVATE int sqlite3FixExprList(DbFixer*, ExprList*);
SQLITE_PRIVATE int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
SQLITE_PRIVATE int sqlite3RealSameAsInt(double,sqlite3_int64);
SQLITE_PRIVATE int sqlite3AtoF(const char *z, double*, int, u8);
SQLITE_PRIVATE int sqlite3GetInt32(const char *, int*);
SQLITE_PRIVATE int sqlite3Atoi(const char*);
#ifndef SQLITE_OMIT_UTF16
SQLITE_PRIVATE int sqlite3Utf16ByteLen(const void *pData, int nChar);
#endif
SQLITE_PRIVATE int sqlite3Utf8CharLen(const char *pData, int nByte);

  /* All the rest are undocumented and are for internal use only */
  {  'T',  0, 0, etTOKEN,      0,  0 },
  {  'S',  0, 0, etSRCLIST,    0,  0 },
  {  'r', 10, 1, etORDINAL,    0,  0 },
};

/* Floating point constants used for rounding */
static const double arRound[] = {
  5.0e-01, 5.0e-02, 5.0e-03, 5.0e-04, 5.0e-05,
  5.0e-06, 5.0e-07, 5.0e-08, 5.0e-09, 5.0e-10,
};

/*
** If SQLITE_OMIT_FLOATING_POINT is defined, then none of the floating point
** conversions will work.
*/
#ifndef SQLITE_OMIT_FLOATING_POINT
/*
** "*val" is a double such that 0.1 <= *val < 10.0

          realvalue = -realvalue;
          prefix = '-';
        }else{
          prefix = flag_prefix;
        }
        if( xtype==etGENERIC && precision>0 ) precision--;
        testcase( precision>0xfff );
        idx = precision & 0xfff;
        rounder = arRound[idx%10];
        while( idx>=10 ){ rounder *= 1.0e-10; idx -= 10; }
        if( xtype==etFLOAT ){
          double rx = (double)realvalue;
          sqlite3_uint64 u;
          int ex;
          memcpy(&u, &rx, sizeof(u));
          ex = -1023 + (int)((u>>52)&0x7ff);
          if( precision+(ex/3) < 15 ) rounder += realvalue*3e-16;
          realvalue += rounder;
        }
        /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
        exp = 0;
        if( sqlite3IsNaN((double)realvalue) ){
          bufpt = "NaN";
          length = 3;
          break;
        }

  return xCallback ? xCallback(iTest) : SQLITE_OK;
}
#endif

#ifndef SQLITE_OMIT_FLOATING_POINT
/*
** Return true if the floating point value is Not a Number (NaN).



*/
SQLITE_PRIVATE int sqlite3IsNaN(double x){





























  u64 y;
  memcpy(&y,&x,sizeof(y));




  return IsNaN(y);
}
#endif /* SQLITE_OMIT_FLOATING_POINT */

/*
** Compute a string length that is limited to what can be stored in
** lower 30 bits of a 32-bit signed integer.
**

** E==2 results in 100.  E==50 results in 1.0e50.
**
** This routine only works for values of E between 1 and 341.
*/
static LONGDOUBLE_TYPE sqlite3Pow10(int E){
#if defined(_MSC_VER)
  static const LONGDOUBLE_TYPE x[] = {
    1.0e+001L,
    1.0e+002L,
    1.0e+004L,
    1.0e+008L,
    1.0e+016L,
    1.0e+032L,
    1.0e+064L,
    1.0e+128L,
    1.0e+256L
  };
  LONGDOUBLE_TYPE r = 1.0;
  int i;
  assert( E>=0 && E<=307 );
  for(i=0; E!=0; i++, E >>=1){
    if( E & 1 ) r *= x[i];
  }

** The string z[] is an text representation of a real number.
** Convert this string to a double and write it into *pResult.
**
** The string z[] is length bytes in length (bytes, not characters) and
** uses the encoding enc.  The string is not necessarily zero-terminated.
**
** Return TRUE if the result is a valid real number (or integer) and FALSE
** if the string is empty or contains extraneous text.  More specifically
** return
**      1          =>  The input string is a pure integer
**      2 or more  =>  The input has a decimal point or eNNN clause
**      0          =>  The input string is not a valid number
**
** Valid numbers are in one of these formats:
**
**    [+-]digits[E[+-]digits]
**    [+-]digits.[digits][E[+-]digits]
**    [+-].digits[E[+-]digits]
**
** Leading and trailing whitespace is ignored for the purpose of determining
** validity.

  int sign = 1;    /* sign of significand */
  i64 s = 0;       /* significand */
  int d = 0;       /* adjust exponent for shifting decimal point */
  int esign = 1;   /* sign of exponent */
  int e = 0;       /* exponent */
  int eValid = 1;  /* True exponent is either not used or is well-formed */
  double result;
  int nDigit = 0;  /* Number of digits processed */
  int eType = 1;   /* 1: pure integer,  2+: fractional  -1 or less: bad UTF16 */

  assert( enc==SQLITE_UTF8 || enc==SQLITE_UTF16LE || enc==SQLITE_UTF16BE );
  *pResult = 0.0;   /* Default return value, in case of an error */

  if( enc==SQLITE_UTF8 ){
    incr = 1;
  }else{
    int i;
    incr = 2;
    assert( SQLITE_UTF16LE==2 && SQLITE_UTF16BE==3 );
    testcase( enc==SQLITE_UTF16LE );
    testcase( enc==SQLITE_UTF16BE );
    for(i=3-enc; i<length && z[i]==0; i+=2){}
    if( i<length ) eType = -100;
    zEnd = &z[i^1];
    z += (enc&1);
  }

  /* skip leading spaces */
  while( z<zEnd && sqlite3Isspace(*z) ) z+=incr;
  if( z>=zEnd ) return 0;

  /* get sign of significand */
  if( *z=='-' ){
    sign = -1;
    z+=incr;
  }else if( *z=='+' ){
    z+=incr;
  }

  /* copy max significant digits to significand */
  while( z<zEnd && sqlite3Isdigit(*z) ){
    s = s*10 + (*z - '0');
    z+=incr; nDigit++;

    if( s>=((LARGEST_INT64-9)/10) ){
      /* skip non-significant significand digits
      ** (increase exponent by d to shift decimal left) */
      while( z<zEnd && sqlite3Isdigit(*z) ){ z+=incr; d++; }
    }
  }
  if( z>=zEnd ) goto do_atof_calc;

  /* if decimal point is present */
  if( *z=='.' ){
    z+=incr;
    eType++;
    /* copy digits from after decimal to significand
    ** (decrease exponent by d to shift decimal right) */
    while( z<zEnd && sqlite3Isdigit(*z) ){
      if( s<((LARGEST_INT64-9)/10) ){
        s = s*10 + (*z - '0');
        d--;
        nDigit++;
      }
      z+=incr;
    }
  }
  if( z>=zEnd ) goto do_atof_calc;

  /* if exponent is present */
  if( *z=='e' || *z=='E' ){
    z+=incr;
    eValid = 0;
    eType++;

    /* This branch is needed to avoid a (harmless) buffer overread.  The 
    ** special comment alerts the mutation tester that the correct answer
    ** is obtained even if the branch is omitted */
    if( z>=zEnd ) goto do_atof_calc;              /*PREVENTS-HARMLESS-OVERREAD*/

    /* get sign of exponent */

    }
  }

  /* store the result */
  *pResult = result;

  /* return true if number and no extra non-whitespace chracters after */
  return z==zEnd && nDigit>0 && eValid && eType>0 ? eType : 0;
#else
  return !sqlite3Atoi64(z, pResult, length, enc);
#endif /* SQLITE_OMIT_FLOATING_POINT */
}

/*
** Compare the 19-character string zNum against the text representation

/* Compare a floating point value to an integer.  Return true if the two
** values are the same within the precision of the floating point value.
**
** For some versions of GCC on 32-bit machines, if you do the more obvious
** comparison of "r1==(double)i" you sometimes get an answer of false even
** though the r1 and (double)i values are bit-for-bit the same.
*/
SQLITE_PRIVATE int sqlite3RealSameAsInt(double r1, sqlite3_int64 i){
  double r2 = (double)i;
  return memcmp(&r1, &r2, sizeof(r1))==0;
}

/*
** Convert pMem so that it has type MEM_Real or MEM_Int.
** Invalidate any prior representations.

** and store the result in pMem.  Return the number of bytes read.
**
** This function is implemented as two separate routines for performance.
** The few cases that require local variables are broken out into a separate
** routine so that in most cases the overhead of moving the stack pointer
** is avoided.
*/ 
static u32 serialGet(
  const unsigned char *buf,     /* Buffer to deserialize from */
  u32 serial_type,              /* Serial type to deserialize */
  Mem *pMem                     /* Memory cell to write value into */
){
  u64 x = FOUR_BYTE_UINT(buf);
  u32 y = FOUR_BYTE_UINT(buf+4);
  x = (x<<32) + y;

    u64 t2 = t1;
    swapMixedEndianFloat(t2);
    assert( sizeof(r1)==sizeof(t2) && memcmp(&r1, &t2, sizeof(r1))==0 );
#endif
    assert( sizeof(x)==8 && sizeof(pMem->u.r)==8 );
    swapMixedEndianFloat(x);
    memcpy(&pMem->u.r, &x, sizeof(x));
    pMem->flags = IsNaN(x) ? MEM_Null : MEM_Real;
  }
  return 8;
}
SQLITE_PRIVATE u32 sqlite3VdbeSerialGet(
  const unsigned char *buf,     /* Buffer to deserialize from */
  u32 serial_type,              /* Serial type to deserialize */
  Mem *pMem                     /* Memory cell to write value into */

      pCx->uc.pCursor = (BtCursor*)
          &pMem->z[ROUND8(sizeof(VdbeCursor))+2*sizeof(u32)*nField];
      sqlite3BtreeCursorZero(pCx->uc.pCursor);
    }
  }
  return pCx;
}

/*
** The string in pRec is known to look like an integer and to have a
** floating point value of rValue.  Return true and set *piValue to the
** integer value if the string is in range to be an integer.  Otherwise,
** return false.
*/
static int alsoAnInt(Mem *pRec, double rValue, i64 *piValue){
  i64 iValue = (double)rValue;
  if( sqlite3RealSameAsInt(rValue,iValue) ){
    testcase( iValue<-2251799813685248 );
    testcase( iValue==-2251799813685248 );
    testcase( iValue==-2251799813685247 );
    testcase( iValue>-2251799813685247 && iValue<+2251799813685247 );
    testcase( iValue==+2251799813685247 );
    testcase( iValue==+2251799813685248 );
    testcase( iValue>+2251799813685248 );
    if( iValue > -2251799813685248 && iValue < 2251799813685248 ){
      *piValue = iValue;
      return 1;
    }
  }
  return 0==sqlite3Atoi64(pRec->z, piValue, pRec->n, pRec->enc);
}

/*
** Try to convert a value into a numeric representation if we can
** do so without loss of information.  In other words, if the string
** looks like a number, convert it into a number.  If it does not
** look like a number, leave it alone.
**
** If the bTryForInt flag is true, then extra effort is made to give
** an integer representation.  Strings that look like floating point
** values but which have no fractional component (example: '48.00')
** will have a MEM_Int representation when bTryForInt is true.
**
** If bTryForInt is false, then if the input string contains a decimal
** point or exponential notation, the result is only MEM_Real, even
** if there is an exact integer representation of the quantity.
*/
static void applyNumericAffinity(Mem *pRec, int bTryForInt){
  double rValue;

  u8 enc = pRec->enc;
  int rc;
  assert( (pRec->flags & (MEM_Str|MEM_Int|MEM_Real|MEM_IntReal))==MEM_Str );
  rc = sqlite3AtoF(pRec->z, &rValue, pRec->n, enc);
  if( rc==0 ) return;
  if( rc==1 && alsoAnInt(pRec, rValue, &pRec->u.i) ){
    pRec->flags |= MEM_Int;
  }else{
    pRec->u.r = rValue;
    pRec->flags |= MEM_Real;
    if( bTryForInt ) sqlite3VdbeIntegerAffinity(pRec);
  }
  /* TEXT->NUMERIC is many->one.  Hence, it is important to invalidate the

  }
  if( sqlite3_value_type(argv[0])==SQLITE_NULL ) return;
  r = sqlite3_value_double(argv[0]);
  /* If Y==0 and X will fit in a 64-bit int,
  ** handle the rounding directly,
  ** otherwise use printf.
  */
  if( r<-4503599627370496.0 || r>+4503599627370496.0 ){
    /* The value has no fractional part so there is nothing to round */
  }else if( n==0 ){  
    r = (double)((sqlite_int64)(r+(r<0?-0.5:+0.5)));
  }else{
    zBuf = sqlite3_mprintf("%.*f",n,r);
    if( zBuf==0 ){
      sqlite3_result_error_nomem(context);
      return;
    }
    if( !sqlite3AtoF(zBuf, &r, sqlite3Strlen30(zBuf), SQLITE_UTF8) ){

  sqlite3 *db;          /* Database connection */

  /* Make sure there is no ORDER BY or LIMIT clause on prior SELECTs.  Only
  ** the last (right-most) SELECT in the series may have an ORDER BY or LIMIT.
  */
  assert( p && p->pPrior );  /* Calling function guarantees this much */
  assert( (p->selFlags & SF_Recursive)==0 || p->op==TK_ALL || p->op==TK_UNION );
  assert( p->selFlags & SF_Compound );
  db = pParse->db;
  pPrior = p->pPrior;
  dest = *pDest;
  if( pPrior->pOrderBy || pPrior->pLimit ){
    sqlite3ErrorMsg(pParse,"%s clause should come after %s not before",
      pPrior->pOrderBy!=0 ? "ORDER BY" : "LIMIT", selectOpName(p->op));
    rc = 1;

      x.iTable = iParent;
      x.iNewTable = iNewParent;
      x.isLeftJoin = isLeftJoin;
      x.pEList = pSub->pEList;
      substSelect(&x, pParent, 0);
    }
  
    /* The flattened query is a compound if either the inner or the
    ** outer query is a compound. */

    pParent->selFlags |= pSub->selFlags & SF_Compound;
    assert( (pSub->selFlags & SF_Distinct)==0 ); /* restriction (17b) */
  
    /*
    ** SELECT ... FROM (SELECT ... LIMIT a OFFSET b) LIMIT x OFFSET y;
    **
    ** One is tempted to try to add a and b to combine the limits.  But this
    ** does not work if either limit is negative.
    */

  int bFirst = (pPrev->n==0);     /* True if this is the first term written */
  int nPrefix;                    /* Size of term prefix in bytes */
  int nSuffix;                    /* Size of term suffix in bytes */

  /* Node must have already been started. There must be a doclist for a
  ** leaf node, and there must not be a doclist for an internal node.  */
  assert( pNode->n>0 );
  assert_fts3_nc( (pNode->a[0]=='\0')==(aDoclist!=0) );

  blobGrowBuffer(pPrev, nTerm, &rc);
  if( rc!=SQLITE_OK ) return rc;

  nPrefix = fts3PrefixCompress(pPrev->a, pPrev->n, zTerm, nTerm);
  nSuffix = nTerm - nPrefix;
  memcpy(pPrev->a, zTerm, nTerm);

static int fts3TermCmp(
  const char *zLhs, int nLhs,     /* LHS of comparison */
  const char *zRhs, int nRhs      /* RHS of comparison */
){
  int nCmp = MIN(nLhs, nRhs);
  int res;

  res = (nCmp ? memcmp(zLhs, zRhs, nCmp) : 0);
  if( res==0 ) res = nLhs - nRhs;

  return res;
}


/*

      }

      for(i=nHeight; i>=0 && rc==SQLITE_OK; i--){
        NodeReader reader;
        pNode = &pWriter->aNodeWriter[i];

        rc = nodeReaderInit(&reader, pNode->block.a, pNode->block.n);
        if( reader.aNode ){
          while( reader.aNode && rc==SQLITE_OK ) rc = nodeReaderNext(&reader);
          blobGrowBuffer(&pNode->key, reader.term.n, &rc);
          if( rc==SQLITE_OK ){
            memcpy(pNode->key.a, reader.term.a, reader.term.n);
            pNode->key.n = reader.term.n;
            if( i>0 ){
              char *aBlock = 0;
              int nBlock = 0;
              pNode = &pWriter->aNodeWriter[i-1];
              pNode->iBlock = reader.iChild;
              rc = sqlite3Fts3ReadBlock(p, reader.iChild, &aBlock, &nBlock, 0);
              blobGrowBuffer(&pNode->block, MAX(nBlock, p->nNodeSize), &rc);
              if( rc==SQLITE_OK ){
                memcpy(pNode->block.a, aBlock, nBlock);
                pNode->block.n = nBlock;
              }
              sqlite3_free(aBlock);
            }
          }
        }
        nodeReaderRelease(&reader);
      }
    }

    rc2 = sqlite3_reset(pSelect);

  const char *zTerm,              /* Omit all terms smaller than this */
  int nTerm,                      /* Size of zTerm in bytes */
  sqlite3_int64 *piBlock          /* OUT: Block number in next layer down */
){
  NodeReader reader;              /* Reader object */
  Blob prev = {0, 0, 0};          /* Previous term written to new node */
  int rc = SQLITE_OK;             /* Return code */
  int bLeaf;                       /* True for a leaf node */

  if( nNode<1 ) return FTS_CORRUPT_VTAB;
  bLeaf = aNode[0]=='\0';

  /* Allocate required output space */
  blobGrowBuffer(pNew, nNode, &rc);
  if( rc!=SQLITE_OK ) return rc;
  pNew->n = 0;

  /* Populate new node buffer */

  Fts5Data *pData;

  pData = fts5DataRead(p, FTS5_STRUCTURE_ROWID);
  if( p->rc==SQLITE_OK ){
    /* TODO: Do we need this if the leaf-index is appended? Probably... */
    memset(&pData->p[pData->nn], 0, FTS5_DATA_PADDING);
    p->rc = fts5StructureDecode(pData->p, pData->nn, &iCookie, &pRet);
    if( p->rc==SQLITE_OK && (pConfig->pgsz==0 || pConfig->iCookie!=iCookie) ){
      p->rc = sqlite3Fts5ConfigLoad(pConfig, iCookie);
    }
    fts5DataRelease(pData);
    if( p->rc!=SQLITE_OK ){
      fts5StructureRelease(pRet);
      pRet = 0;
    }

static void fts5SourceIdFunc(
  sqlite3_context *pCtx,          /* Function call context */
  int nArg,                       /* Number of args */
  sqlite3_value **apUnused        /* Function arguments */
){
  assert( nArg==0 );
  UNUSED_PARAM2(nArg, apUnused);
  sqlite3_result_text(pCtx, "fts5: 2019-06-04 18:21:59 4979f138e8c8bef7dd6b5921fb9ca9fea86bbf7ec1419934bb2d1a0d74e77183", -1, SQLITE_TRANSIENT);
}

/*
** Return true if zName is the extension on one of the shadow tables used
** by this module.
*/
static int fts5ShadowName(const char *zName){

#endif
  return rc;
}
#endif /* SQLITE_CORE */
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_STMTVTAB) */

/************** End of stmt.c ************************************************/
#if __LINE__!=223628
#undef SQLITE_SOURCE_ID
#define SQLITE_SOURCE_ID      "2019-06-05 14:29:53 7b3a99fce8b4a757f2b2ef2f0b02d68566f2528d9ae1e30628522717f872alt2"
#endif
/* Return the source-id for this library */
SQLITE_API const char *sqlite3_sourceid(void){ return SQLITE_SOURCE_ID; }
/************************** End of sqlite3.c ******************************/

**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.29.0"
#define SQLITE_VERSION_NUMBER 3029000
#define SQLITE_SOURCE_ID      "2019-06-05 14:29:53 7b3a99fce8b4a757f2b2ef2f0b02d68566f2528d9ae1e30628522717f872466c"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros