SQLite4  Check-in [56335097b1]

        len = sqlite4GetToken(zCsr, &token);
      } while( token==TK_SPACE );
      assert( len>0 );
    } while( token!=TK_LP && token!=TK_USING );

    zRet = sqlite4MPrintf(db, "%.*s\"%w\"%s", ((u8*)tname.z) - zSql, zSql, 
       zTableName, tname.z+tname.n);
    sqlite4_result_text(context, zRet, -1, SQLITE4_TRANSIENT);
    sqlite4_result_text(context, zRet, -1, SQLITE4_TRANSIENT, 0);
    sqlite4DbFree(db, zRet);
  }
}

/*
** This C function implements an SQL user function that is used by SQL code
** generated by the ALTER TABLE ... RENAME command to modify the definition

        zInput = &z[n];
      }
      sqlite4DbFree(db, zParent);
    }
  }

  zResult = sqlite4MPrintf(db, "%s%s", (zOutput?zOutput:""), zInput), 
  sqlite4_result_text(context, zResult, -1, SQLITE4_TRANSIENT);
  sqlite4_result_text(context, zResult, -1, SQLITE4_TRANSIENT, 0);
  sqlite4DbFree(db, zOutput);
  sqlite4DbFree(db, zResult);
}
#endif

#ifndef SQLITE4_OMIT_TRIGGER
/* This function is used by SQL generated to implement the

    } while( dist!=2 || (token!=TK_WHEN && token!=TK_FOR && token!=TK_BEGIN) );

    /* Variable tname now contains the token that is the old table-name
    ** in the CREATE TRIGGER statement.
    */
    zRet = sqlite4MPrintf(db, "%.*s\"%w\"%s", ((u8*)tname.z) - zSql, zSql, 
       zTableName, tname.z+tname.n);
    sqlite4_result_text(context, zRet, -1, SQLITE4_TRANSIENT);
    sqlite4_result_text(context, zRet, -1, SQLITE4_TRANSIENT, 0);
    sqlite4DbFree(db, zRet);
  }
}
#endif   /* !SQLITE4_OMIT_TRIGGER */

/*
** Register built-in functions used to help implement ALTER TABLE

    db->xCollNeeded(db->pCollNeededArg, db, enc, zExternal);
    sqlite4DbFree(db, zExternal);
  }
#ifndef SQLITE4_OMIT_UTF16
  if( db->xCollNeeded16 ){
    char const *zExternal;
    sqlite4_value *pTmp = sqlite4ValueNew(db);
    sqlite4ValueSetStr(pTmp, -1, zName, SQLITE4_UTF8, SQLITE4_STATIC);
    sqlite4ValueSetStr(pTmp, -1, zName, SQLITE4_UTF8, SQLITE4_STATIC, 0);
    zExternal = sqlite4ValueText(pTmp, SQLITE4_UTF16NATIVE);
    if( zExternal ){
      db->xCollNeeded16(db->pCollNeededArg, db, (int)ENC(db), zExternal);
    }
    sqlite4ValueFree(pTmp);
  }
#endif

  int rc = SQLITE4_NOMEM;

#ifndef SQLITE4_OMIT_AUTOINIT
  rc = sqlite4_initialize(0);
  if( rc ) return rc;
#endif
  pVal = sqlite4ValueNew(0);
  sqlite4ValueSetStr(pVal, -1, zSql, SQLITE4_UTF16NATIVE, SQLITE4_STATIC);
  sqlite4ValueSetStr(pVal, -1, zSql, SQLITE4_UTF16NATIVE, SQLITE4_STATIC, 0);
  zSql8 = sqlite4ValueText(pVal, SQLITE4_UTF8);
  if( zSql8 ){
    rc = sqlite4_complete(zSql8);
  }else{
    rc = SQLITE4_NOMEM;
  }
  sqlite4ValueFree(pVal);

){
  DateTime x;
  if( isDate(context, argc, argv, &x)==0 ){
    char zBuf[100];
    computeYMD_HMS(&x);
    sqlite4_snprintf(zBuf,sizeof(zBuf), "%04d-%02d-%02d %02d:%02d:%02d",
                     x.Y, x.M, x.D, x.h, x.m, (int)(x.s));
    sqlite4_result_text(context, zBuf, -1, SQLITE4_TRANSIENT);
    sqlite4_result_text(context, zBuf, -1, SQLITE4_TRANSIENT, 0);
  }
}

/*
**    time( TIMESTRING, MOD, MOD, ...)
**
** Return HH:MM:SS
*/
static void timeFunc(
  sqlite4_context *context,
  int argc,
  sqlite4_value **argv
){
  DateTime x;
  if( isDate(context, argc, argv, &x)==0 ){
    char zBuf[100];
    computeHMS(&x);
    sqlite4_snprintf(zBuf,sizeof(zBuf), "%02d:%02d:%02d", x.h, x.m, (int)x.s);
    sqlite4_result_text(context, zBuf, -1, SQLITE4_TRANSIENT);
    sqlite4_result_text(context, zBuf, -1, SQLITE4_TRANSIENT, 0);
  }
}

/*
**    date( TIMESTRING, MOD, MOD, ...)
**
** Return YYYY-MM-DD
*/
static void dateFunc(
  sqlite4_context *context,
  int argc,
  sqlite4_value **argv
){
  DateTime x;
  if( isDate(context, argc, argv, &x)==0 ){
    char zBuf[100];
    computeYMD(&x);
    sqlite4_snprintf(zBuf,sizeof(zBuf), "%04d-%02d-%02d", x.Y, x.M, x.D);
    sqlite4_result_text(context, zBuf, -1, SQLITE4_TRANSIENT);
    sqlite4_result_text(context, zBuf, -1, SQLITE4_TRANSIENT, 0);
  }
}

/*
**    strftime( FORMAT, TIMESTRING, MOD, MOD, ...)
**
** Return a string described by FORMAT.  Conversions as follows:

        }
        default:   z[j++] = '%'; break;
      }
    }
  }
  z[j] = 0;
  sqlite4_result_text(context, z, -1,
                      z==zBuf ? SQLITE4_TRANSIENT : SQLITE4_DYNAMIC);
                      z==zBuf ? SQLITE4_TRANSIENT : SQLITE4_DYNAMIC, 0);
}

/*
** current_time()
**
** This function returns the same value as time('now').
*/

  sqlite4_mutex_enter(sqlite4MutexAlloc(SQLITE4_MUTEX_STATIC_MASTER));
  pTm = gmtime(&t);
  if( pTm ) memcpy(&sNow, pTm, sizeof(sNow));
  sqlite4_mutex_leave(sqlite4MutexAlloc(SQLITE4_MUTEX_STATIC_MASTER));
#endif
  if( pTm ){
    strftime(zBuf, 20, zFormat, &sNow);
    sqlite4_result_text(context, zBuf, -1, SQLITE4_TRANSIENT);
    sqlite4_result_text(context, zBuf, -1, SQLITE4_TRANSIENT, 0);
  }
}
#endif

/*
** This function registered all of the above C functions as SQL
** functions.  This should be the only routine in this file with

    if( zErr==0 ){
      zErr = sqlite4MPrintf(db, "error parsing expression: %d", rc);
    }
    goto fts5_parse_expr_out;
  }

  fts5PrintExpr(db, azCol, pExpr, &zRet);
  sqlite4_result_text(pCtx, zRet, -1, SQLITE4_TRANSIENT);
  sqlite4_result_text(pCtx, zRet, -1, SQLITE4_TRANSIENT, 0);
  fts5ExpressionFree(db, pExpr);
  sqlite4_free(sqlite4_db_env(db), zRet);

 fts5_parse_expr_out:
  if( p ) pTok->xDestroy(p);
  sqlite4DbFree(db, azCol);
  sqlite4_finalize(pStmt);

  int rc = sqlite4_create_function(
      db, "fts5_parse_expr", 3, SQLITE4_UTF8, 0, fts5_parse_expr, 0, 0
  );
  if( rc!=SQLITE4_OK ) return rc;
#endif
  return sqlite4InitFts5Func(db);
}

struct Fts5RankCtx {
  sqlite4 *db;
  double *aAvgdl;                 /* Average document size of each field */
  int nPhrase;                    /* Number of phrases in query */
  double *aIdf;                   /* IDF weights for each phrase in query */
};

static void fts5RankFreeCtx(void *pCtx){
static void fts5RankFreeCtx(void *pNotUsed, void *pCtx){
  if( pCtx ){
    Fts5RankCtx *p = (Fts5RankCtx *)pCtx;
    sqlite4DbFree(p->db, p);
  }
}

#define BM25_EXPLAIN  0x01

  if( p==0 ){
    int nPhrase;                  /* Number of phrases in query expression */
    int nByte;                    /* Number of bytes of data to allocate */

    sqlite4_mi_phrase_count(pCtx, &nPhrase);
    nByte = sizeof(Fts5RankCtx) + (nPhrase+nField) * sizeof(double);
    p = (Fts5RankCtx *)sqlite4DbMallocZero(db, nByte);
    sqlite4_set_auxdata(pCtx, 0, (void *)p, fts5RankFreeCtx);
    sqlite4_set_auxdata(pCtx, 0, (void *)p, fts5RankFreeCtx, 0);
    p = sqlite4_get_auxdata(pCtx, 0);

    if( !p ){
      rc = SQLITE4_NOMEM;
    }else{
      int N;                      /* Total number of docs in collection */
      int ni;                     /* Number of docs with phrase i */

  }

  if( rc==SQLITE4_OK ){
    if( bExplain ){
      zExplain = sqlite4MAppendf(
          db, zExplain, "%s</table><b>overall rank=%.2f</b>", zExplain, rank
      );
      sqlite4_result_text(pCtx, zExplain, -1, SQLITE4_TRANSIENT);
      sqlite4_result_text(pCtx, zExplain, -1, SQLITE4_TRANSIENT, 0);
    }else{
      sqlite4_result_double(pCtx, rank);
    }
  }else{
    sqlite4_result_error_code(pCtx, rc);
  }
  sqlite4DbFree(db, zExplain);

        if( rc==SQLITE4_OK ){
          fts5SnippetImprove(pCtx, nTok, nSz, &aSnip[i]);
          rc = fts5SnippetText(
              pCtx, &aSnip[i], &text, nTok, zStart, zEnd, zEllipses
          );
        }
      }
      sqlite4_result_text(pCtx, text.zOut, text.nOut, SQLITE4_TRANSIENT);
      sqlite4_result_text(pCtx, text.zOut, text.nOut, SQLITE4_TRANSIENT, 0);
      sqlite4DbFree(sqlite4_context_db_handle(pCtx), text.zOut);
      break;
    }
  }

  if( rc!=SQLITE4_OK ){
    sqlite4_result_error_code(pCtx, rc);

    void *p = SQLITE4_INT_TO_PTR(aRank[i].mask);
    const char *z = aRank[i].zName;
    rc = sqlite4_create_mi_function(db, z, -1, SQLITE4_UTF8, p, fts5Rank, 0);
  }

  return rc;
}

  switch( sqlite4_value_type(argv[0]) ){
    case SQLITE4_INTEGER: z = "integer"; break;
    case SQLITE4_TEXT:    z = "text";    break;
    case SQLITE4_FLOAT:   z = "real";    break;
    case SQLITE4_BLOB:    z = "blob";    break;
    default:             z = "null";    break;
  }
  sqlite4_result_text(context, z, -1, SQLITE4_STATIC);
  sqlite4_result_text(context, z, -1, SQLITE4_STATIC, 0);
}


/*
** Implementation of the length() function
*/
static void lengthFunc(

    while( *z && p1 ){
      SQLITE4_SKIP_UTF8(z);
      p1--;
    }
    for(z2=z; *z2 && p2; p2--){
      SQLITE4_SKIP_UTF8(z2);
    }
    sqlite4_result_text(context, (char*)z, (int)(z2-z), SQLITE4_TRANSIENT);
    sqlite4_result_text(context, (char*)z, (int)(z2-z), SQLITE4_TRANSIENT, 0);
  }else{
    if( p1+p2>len ){
      p2 = len-p1;
      if( p2<0 ) p2 = 0;
    }
    sqlite4_result_blob(context, (char*)&z[p1], (int)p2, SQLITE4_TRANSIENT);
    sqlite4_result_blob(context, (char*)&z[p1], (int)p2, SQLITE4_TRANSIENT, 0);
  }
}

/*
** Implementation of the round() function
*/
#ifndef SQLITE4_OMIT_FLOATING_POINT

  assert( z2==(char*)sqlite4_value_text(argv[0]) );
  if( z2 ){
    z1 = contextMalloc(context, ((i64)n)+1);
    if( z1 ){
      for(i=0; i<n; i++){
        z1[i] = (char)sqlite4Toupper(z2[i]);
      }
      sqlite4_result_text(context, z1, n, SQLITE4_DYNAMIC);
      sqlite4_result_text(context, z1, n, SQLITE4_DYNAMIC, 0);
    }
  }
}
static void lowerFunc(sqlite4_context *context, int argc, sqlite4_value **argv){
  char *z1;
  const char *z2;
  int i, n;
  UNUSED_PARAMETER(argc);
  z2 = (char*)sqlite4_value_text(argv[0]);
  n = sqlite4_value_bytes(argv[0]);
  /* Verify that the call to _bytes() does not invalidate the _text() pointer */
  assert( z2==(char*)sqlite4_value_text(argv[0]) );
  if( z2 ){
    z1 = contextMalloc(context, ((i64)n)+1);
    if( z1 ){
      for(i=0; i<n; i++){
        z1[i] = sqlite4Tolower(z2[i]);
      }
      sqlite4_result_text(context, z1, n, SQLITE4_DYNAMIC);
      sqlite4_result_text(context, z1, n, SQLITE4_DYNAMIC, 0);
    }
  }
}


#if 0  /* This function is never used. */
/*

  n = sqlite4_value_int(argv[0]);
  if( n<1 ){
    n = 1;
  }
  p = contextMalloc(context, n);
  if( p ){
    sqlite4_randomness(sqlite4_context_env(context), n, p);
    sqlite4_result_blob(context, (char*)p, n, SQLITE4_DYNAMIC);
    sqlite4_result_blob(context, (char*)p, n, SQLITE4_DYNAMIC, 0);
  }
}

/*
** Implementation of the last_insert_rowid() SQL function.  The return
** value is the same as the sqlite4_last_insert_rowid() API function.
*/

  sqlite4_context *context,
  int NotUsed,
  sqlite4_value **NotUsed2
){
  UNUSED_PARAMETER2(NotUsed, NotUsed2);
  /* IMP: R-48699-48617 This function is an SQL wrapper around the
  ** sqlite4_libversion() C-interface. */
  sqlite4_result_text(context, sqlite4_libversion(), -1, SQLITE4_STATIC);
  sqlite4_result_text(context, sqlite4_libversion(), -1, SQLITE4_STATIC, 0);
}

/*
** Implementation of the sqlite_source_id() function. The result is a string
** that identifies the particular version of the source code used to build
** SQLite.
*/
static void sourceidFunc(
  sqlite4_context *context,
  int NotUsed,
  sqlite4_value **NotUsed2
){
  UNUSED_PARAMETER2(NotUsed, NotUsed2);
  /* IMP: R-24470-31136 This function is an SQL wrapper around the
  ** sqlite4_sourceid() C interface. */
  sqlite4_result_text(context, sqlite4_sourceid(), -1, SQLITE4_STATIC);
  sqlite4_result_text(context, sqlite4_sourceid(), -1, SQLITE4_STATIC, 0);
}

/*
** Implementation of the sqlite_log() function.  This is a wrapper around
** sqlite4_log().  The return value is NULL.  The function exists purely for
** its side-effects.
*/

  int n;
  assert( argc==1 );
  UNUSED_PARAMETER(argc);
  /* IMP: R-04922-24076 The sqlite_compileoption_get() SQL function
  ** is a wrapper around the sqlite4_compileoption_get() C/C++ function.
  */
  n = sqlite4_value_int(argv[0]);
  sqlite4_result_text(context, sqlite4_compileoption_get(n), -1, SQLITE4_STATIC);
  sqlite4_result_text(context, sqlite4_compileoption_get(n), -1,
                      SQLITE4_STATIC, 0);
}
#endif /* SQLITE4_OMIT_COMPILEOPTION_DIAGS */

/* Array for converting from half-bytes (nybbles) into ASCII hex
** digits. */
static const char hexdigits[] = {
  '0', '1', '2', '3', '4', '5', '6', '7',

          zText[(i*2)+2] = hexdigits[(zBlob[i]>>4)&0x0F];
          zText[(i*2)+3] = hexdigits[(zBlob[i])&0x0F];
        }
        zText[(nBlob*2)+2] = '\'';
        zText[(nBlob*2)+3] = '\0';
        zText[0] = 'x';
        zText[1] = '\'';
        sqlite4_result_text(context, zText, -1, SQLITE4_TRANSIENT);
        sqlite4_result_text(context, zText, -1, SQLITE4_TRANSIENT, 0);
        sqlite4_free(sqlite4_context_env(context), zText);
      }
      break;
    }
    case SQLITE4_TEXT: {
      int i,j;
      u64 n;

          z[j++] = zArg[i];
          if( zArg[i]=='\'' ){
            z[j++] = '\'';
          }
        }
        z[j++] = '\'';
        z[j] = 0;
        sqlite4_result_text(context, z, j, SQLITE4_DYNAMIC);
        sqlite4_result_text(context, z, j, SQLITE4_DYNAMIC, 0);
      }
      break;
    }
    default: {
      assert( sqlite4_value_type(argv[0])==SQLITE4_NULL );
      sqlite4_result_text(context, "NULL", 4, SQLITE4_STATIC);
      sqlite4_result_text(context, "NULL", 4, SQLITE4_STATIC, 0);
      break;
    }
  }
}

/*
** The hex() function.  Interpret the argument as a blob.  Return

  if( zHex ){
    for(i=0; i<n; i++, pBlob++){
      unsigned char c = *pBlob;
      *(z++) = hexdigits[(c>>4)&0xf];
      *(z++) = hexdigits[c&0xf];
    }
    *z = 0;
    sqlite4_result_text(context, zHex, n*2, SQLITE4_DYNAMIC);
    sqlite4_result_text(context, zHex, n*2, SQLITE4_DYNAMIC, 0);
  }
}

/*
** The zeroblob(N) function returns a zero-filled blob of size N bytes.
*/
static void zeroblobFunc(

    }
  }
  assert( j+nStr-i+1==nOut );
  memcpy(&zOut[j], &zStr[i], nStr-i);
  j += nStr - i;
  assert( j<=nOut );
  zOut[j] = 0;
  sqlite4_result_text(context, (char*)zOut, j, SQLITE4_DYNAMIC);
  sqlite4_result_text(context, (char*)zOut, j, SQLITE4_DYNAMIC, 0);
}

/*
** Implementation of the TRIM(), LTRIM(), and RTRIM() functions.
** The userdata is 0x1 for left trim, 0x2 for right trim, 0x3 for both.
*/
static void trimFunc(

        nIn -= len;
      }
    }
    if( zCharSet ){
      sqlite4_free(sqlite4_context_env(context), azChar);
    }
  }
  sqlite4_result_text(context, (char*)zIn, nIn, SQLITE4_TRANSIENT);
  sqlite4_result_text(context, (char*)zIn, nIn, SQLITE4_TRANSIENT, 0);
}


/* IMP: R-25361-16150 This function is omitted from SQLite by default. It
** is only available if the SQLITE4_SOUNDEX compile-time option is used
** when SQLite is built.
*/

        prevcode = 0;
      }
    }
    while( j<4 ){
      zResult[j++] = '0';
    }
    zResult[j] = 0;
    sqlite4_result_text(context, zResult, 4, SQLITE4_TRANSIENT);
    sqlite4_result_text(context, zResult, 4, SQLITE4_TRANSIENT, 0);
  }else{
    /* IMP: R-64894-50321 The string "?000" is returned if the argument
    ** is NULL or contains no ASCII alphabetic characters. */
    sqlite4_result_text(context, "?000", 4, SQLITE4_STATIC);
    sqlite4_result_text(context, "?000", 4, SQLITE4_STATIC, 0);
  }
}
#endif /* SQLITE4_SOUNDEX */

#if 0 /*ndef SQLITE4_OMIT_LOAD_EXTENSION*/
/*
** A function that loads a shared-library extension then returns NULL.

  if( pAccum ){
    if( pAccum->tooBig ){
      sqlite4_result_error_toobig(context);
    }else if( pAccum->mallocFailed ){
      sqlite4_result_error_nomem(context);
    }else{    
      sqlite4_result_text(context, sqlite4StrAccumFinish(pAccum), -1, 
                          SQLITE4_DYNAMIC);
                          SQLITE4_DYNAMIC, 0);
    }
  }
}

/*
** This routine does per-connection function registration.  Most
** of the built-in functions above are part of the global function set.

#ifdef SQLITE4_ENABLE_ICU
# include "sqliteicu.h"
#endif

/*
** Dummy function used as a unique symbol for SQLITE4_DYNAMIC
*/
void sqlite4_dynamic(void *p){ (void)p; }
void sqlite4_dynamic(void *pArg,void *p){ (void)pArg; (void)p; }

#ifndef SQLITE4_AMALGAMATION
/* IMPLEMENTATION-OF: R-46656-45156 The sqlite4_version[] string constant
** contains the text of SQLITE4_VERSION macro. 
*/
const char sqlite4_version[] = SQLITE4_VERSION;
#endif

  sqlite4_mutex_enter(db->mutex);
  if( db->mallocFailed ){
    z = (void *)outOfMem;
  }else{
    z = sqlite4_value_text16(db->pErr);
    if( z==0 ){
      sqlite4ValueSetStr(db->pErr, -1, sqlite4ErrStr(db->errCode),
           SQLITE4_UTF8, SQLITE4_STATIC);
           SQLITE4_UTF8, SQLITE4_STATIC, 0);
      z = sqlite4_value_text16(db->pErr);
    }
    /* A malloc() may have failed within the call to sqlite4_value_text16()
    ** above. If this is the case, then the db->mallocFailed flag needs to
    ** be cleared before returning. Do this directly, instead of via
    ** sqlite4ApiExit(), to avoid setting the database handle error message.
    */

  int argc,
  sqlite4_value **argv
){
  assert( 0==argc );
  assert( zShellStatic );
  UNUSED_PARAMETER(argc);
  UNUSED_PARAMETER(argv);
  sqlite4_result_text(context, zShellStatic, -1, SQLITE4_STATIC);
  sqlite4_result_text(context, zShellStatic, -1, SQLITE4_STATIC, 0);
}


/*
** 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()

          int k;
          for(z=azCol[i], j=1, k=0; z[j]; j++){
            if( z[j]=='"' ){ j++; if( z[j]==0 ) break; }
            z[k++] = z[j];
          }
          z[k] = 0;
        }
        sqlite4_bind_text(pStmt, i+1, azCol[i], -1, SQLITE4_STATIC);
        sqlite4_bind_text(pStmt, i+1, azCol[i], -1, SQLITE4_STATIC, 0);
      }
      sqlite4_step(pStmt);
      rc = sqlite4_reset(pStmt);
      free(zLine);
      if( rc!=SQLITE4_OK ){
        fprintf(stderr,"Error: %s\n", sqlite4_errmsg(db));
        zCommit = "ROLLBACK";

    zSql = sqlite4_mprintf(0, "%z ORDER BY 1", zSql);
    rc = sqlite4_prepare(p->db, zSql, -1, &pStmt, 0);
    sqlite4_free(0, zSql);
    if( rc ) return rc;
    nRow = nAlloc = 0;
    azResult = 0;
    if( nArg>1 ){
      sqlite4_bind_text(pStmt, 1, azArg[1], -1, SQLITE4_TRANSIENT);
      sqlite4_bind_text(pStmt, 1, azArg[1], -1, SQLITE4_TRANSIENT, 0);
    }else{
      sqlite4_bind_text(pStmt, 1, "%", -1, SQLITE4_STATIC);
      sqlite4_bind_text(pStmt, 1, "%", -1, SQLITE4_STATIC, 0);
    }
    while( sqlite4_step(pStmt)==SQLITE4_ROW ){
      if( nRow>=nAlloc ){
        char **azNew;
        int n = nAlloc*2 + 10;
        azNew = sqlite4_realloc(0, azResult, sizeof(azResult[0])*n);
        if( azNew==0 ){

** [error code] if anything goes wrong.
** ^[SQLITE4_RANGE] is returned if the parameter
** index is out of range.  ^[SQLITE4_NOMEM] is returned if malloc() fails.
**
** See also: [sqlite4_bind_parameter_count()],
** [sqlite4_bind_parameter_name()], and [sqlite4_bind_parameter_index()].
*/
int sqlite4_bind_blob(sqlite4_stmt*, int, const void*, int n, void(*)(void*));
int sqlite4_bind_blob(sqlite4_stmt*, int, const void*, int n, 
                      void(*)(void*,void*),void*);
int sqlite4_bind_double(sqlite4_stmt*, int, double);
int sqlite4_bind_int(sqlite4_stmt*, int, int);
int sqlite4_bind_int64(sqlite4_stmt*, int, sqlite4_int64);
int sqlite4_bind_null(sqlite4_stmt*, int);
int sqlite4_bind_text(sqlite4_stmt*, int, const char*, int n, void(*)(void*));
int sqlite4_bind_text16(sqlite4_stmt*, int, const void*, int, void(*)(void*));
int sqlite4_bind_text(sqlite4_stmt*, int, const char*, int n,
                      void(*)(void*,void*),void*);
int sqlite4_bind_text16(sqlite4_stmt*, int, const void*, int,
                        void(*)(void*,void*),void*);
int sqlite4_bind_value(sqlite4_stmt*, int, const sqlite4_value*);
int sqlite4_bind_zeroblob(sqlite4_stmt*, int, int n);

/*
** CAPIREF: Number Of SQL Parameters
**
** ^This routine can be used to find the number of [SQL parameters]

** expressions that are constant at compile time. This includes literal
** values and [parameters].)^
**
** These routines must be called from the same thread in which
** the SQL function is running.
*/
void *sqlite4_get_auxdata(sqlite4_context*, int N);
void sqlite4_set_auxdata(sqlite4_context*, int N, void*, void (*)(void*));
void sqlite4_set_auxdata(sqlite4_context*, int N, void*,
                         void (*)(void*,void*),void*);


/*
** CAPIREF: Constants Defining Special Destructor Behavior
**
** These are special values for the destructor that is passed in as the
** final argument to routines like [sqlite4_result_blob()].  ^If the destructor
** argument is SQLITE4_STATIC, it means that the content pointer is constant
** and will never change.  It does not need to be destroyed.  ^The
** SQLITE4_TRANSIENT value means that the content will likely change in
** the near future and that SQLite should make its own private copy of
** the content before returning.
**
** The typedef is necessary to work around problems in certain
** C++ compilers.  See ticket #2191.
*/
typedef void (*sqlite4_destructor_type)(void*);
void sqlite4_dynamic(void*);
typedef void (*sqlite4_destructor_type)(void*,void*);
void sqlite4_dynamic(void*,void*);
#define SQLITE4_STATIC      ((sqlite4_destructor_type)0)
#define SQLITE4_TRANSIENT   ((sqlite4_destructor_type)-1)
#define SQLITE4_DYNAMIC     (sqlite4_dynamic)


/*
** CAPIREF: Setting The Result Of An SQL Function

** [unprotected sqlite4_value] object is required, so either
** kind of [sqlite4_value] object can be used with this interface.
**
** If these routines are called from within the different thread
** than the one containing the application-defined function that received
** the [sqlite4_context] pointer, the results are undefined.
*/
void sqlite4_result_blob(sqlite4_context*, const void*, int, void(*)(void*));
void sqlite4_result_blob(sqlite4_context*, const void*, int,
                         void(*)(void*,void*),void*);
void sqlite4_result_double(sqlite4_context*, double);
void sqlite4_result_error(sqlite4_context*, const char*, int);
void sqlite4_result_error16(sqlite4_context*, const void*, int);
void sqlite4_result_error_toobig(sqlite4_context*);
void sqlite4_result_error_nomem(sqlite4_context*);
void sqlite4_result_error_code(sqlite4_context*, int);
void sqlite4_result_int(sqlite4_context*, int);
void sqlite4_result_int64(sqlite4_context*, sqlite4_int64);
void sqlite4_result_null(sqlite4_context*);
void sqlite4_result_text(sqlite4_context*, const char*, int, void(*)(void*));
void sqlite4_result_text16(sqlite4_context*, const void*, int, void(*)(void*));
void sqlite4_result_text16le(sqlite4_context*, const void*, int,void(*)(void*));
void sqlite4_result_text16be(sqlite4_context*, const void*, int,void(*)(void*));
void sqlite4_result_text(sqlite4_context*, const char*, int,
                         void(*)(void*,void*),void*);
void sqlite4_result_text16(sqlite4_context*, const void*, int,
                           void(*)(void*,void*),void*);
void sqlite4_result_text16le(sqlite4_context*, const void*, int,
                             void(*)(void*,void*),void*);
void sqlite4_result_text16be(sqlite4_context*, const void*, int,
                             void(*)(void*,void*),void*);
void sqlite4_result_value(sqlite4_context*, sqlite4_value*);
void sqlite4_result_zeroblob(sqlite4_context*, int n);

/*
** CAPIREF: Define New Collating Sequences
**
** ^This function adds, removes, or modifies a [collation] associated

# define sqlite4FileSuffix3(X,Y)
#endif
u8 sqlite4GetBoolean(const char *z);

const void *sqlite4ValueText(sqlite4_value*, u8);
int sqlite4ValueBytes(sqlite4_value*, u8);
void sqlite4ValueSetStr(sqlite4_value*, int, const void *,u8, 
                        void(*)(void*));
                        void(*)(void*,void*),void*);
void sqlite4ValueFree(sqlite4_value*);
sqlite4_value *sqlite4ValueNew(sqlite4 *);
char *sqlite4Utf16to8(sqlite4 *, const void*, int, u8);
#ifdef SQLITE4_ENABLE_STAT3
char *sqlite4Utf8to16(sqlite4 *, u8, char *, int, int *);
#endif
int sqlite4ValueFromExpr(sqlite4 *, Expr *, u8, u8, sqlite4_value **);

    u8 *data;
    const char *zType = (pVar->typePtr ? pVar->typePtr->name : "");
    char c = zType[0];
    if( c=='b' && strcmp(zType,"bytearray")==0 && pVar->bytes==0 ){
      /* Only return a BLOB type if the Tcl variable is a bytearray and
      ** has no string representation. */
      data = Tcl_GetByteArrayFromObj(pVar, &n);
      sqlite4_result_blob(context, data, n, SQLITE4_TRANSIENT);
      sqlite4_result_blob(context, data, n, SQLITE4_TRANSIENT, 0);
    }else if( c=='b' && strcmp(zType,"boolean")==0 ){
      Tcl_GetIntFromObj(0, pVar, &n);
      sqlite4_result_int(context, n);
    }else if( c=='d' && strcmp(zType,"double")==0 ){
      double r;
      Tcl_GetDoubleFromObj(0, pVar, &r);
      sqlite4_result_double(context, r);
    }else if( (c=='w' && strcmp(zType,"wideInt")==0) ||
          (c=='i' && strcmp(zType,"int")==0) ){
      Tcl_WideInt v;
      Tcl_GetWideIntFromObj(0, pVar, &v);
      sqlite4_result_int64(context, v);
    }else{
      data = (unsigned char *)Tcl_GetStringFromObj(pVar, &n);
      sqlite4_result_text(context, (char *)data, n, SQLITE4_TRANSIENT);
      sqlite4_result_text(context, (char *)data, n, SQLITE4_TRANSIENT, 0);
    }
  }
}

#ifndef SQLITE4_OMIT_AUTHORIZATION
/*
** This is the authentication function.  It appends the authentication

        char c = zType[0];
        if( zVar[0]=='@' ||
           (c=='b' && strcmp(zType,"bytearray")==0 && pVar->bytes==0) ){
          /* Load a BLOB type if the Tcl variable is a bytearray and
          ** it has no string representation or the host
          ** parameter name begins with "@". */
          data = Tcl_GetByteArrayFromObj(pVar, &n);
          sqlite4_bind_blob(pStmt, i, data, n, SQLITE4_STATIC);
          sqlite4_bind_blob(pStmt, i, data, n, SQLITE4_STATIC, 0);
          Tcl_IncrRefCount(pVar);
          pPreStmt->apParm[iParm++] = pVar;
        }else if( c=='b' && strcmp(zType,"boolean")==0 ){
          Tcl_GetIntFromObj(interp, pVar, &n);
          sqlite4_bind_int(pStmt, i, n);
        }else if( c=='d' && strcmp(zType,"double")==0 ){
          double r;
          Tcl_GetDoubleFromObj(interp, pVar, &r);
          sqlite4_bind_double(pStmt, i, r);
        }else if( (c=='w' && strcmp(zType,"wideInt")==0) ||
              (c=='i' && strcmp(zType,"int")==0) ){
          Tcl_WideInt v;
          Tcl_GetWideIntFromObj(interp, pVar, &v);
          sqlite4_bind_int64(pStmt, i, v);
        }else{
          data = (unsigned char *)Tcl_GetStringFromObj(pVar, &n);
          sqlite4_bind_text(pStmt, i, (char *)data, n, SQLITE4_STATIC);
          sqlite4_bind_text(pStmt, i, (char *)data, n, SQLITE4_STATIC, 0);
          Tcl_IncrRefCount(pVar);
          pPreStmt->apParm[iParm++] = pVar;
        }
      }else{
        sqlite4_bind_null(pStmt, i);
      }
    }

      for(i=0; i<nCol; i++){
        /* check for null data, if so, bind as null */
        if( (nNull>0 && strcmp(azCol[i], zNull)==0)
          || strlen30(azCol[i])==0 
        ){
          sqlite4_bind_null(pStmt, i+1);
        }else{
          sqlite4_bind_text(pStmt, i+1, azCol[i], -1, SQLITE4_STATIC);
          sqlite4_bind_text(pStmt, i+1, azCol[i], -1, SQLITE4_STATIC, 0);
        }
      }
      sqlite4_step(pStmt);
      rc = sqlite4_reset(pStmt);
      free(zLine);
      if( rc!=SQLITE4_OK ){
        Tcl_AppendResult(interp,"Error: ", sqlite4_errmsg(pDb->db), 0);

static void md5finalize(sqlite4_context *context){
  MD5Context *p;
  unsigned char digest[16];
  char zBuf[33];
  p = sqlite4_aggregate_context(context, sizeof(*p));
  MD5Final(digest,p);
  MD5DigestToBase16(digest, zBuf);
  sqlite4_result_text(context, zBuf, -1, SQLITE4_TRANSIENT);
  sqlite4_result_text(context, zBuf, -1, SQLITE4_TRANSIENT, 0);
}
int Md5_Register(sqlite4 *db){
  int rc = sqlite4_create_function(db, "md5sum", -1, SQLITE4_UTF8, 0, 0, 
                                 md5step, md5finalize);
  sqlite4_overload_function(db, "md5sum", -1);  /* To exercise this API */
  return rc;
}

**
** NULL is returned if there is an allocation error.
*/
char *sqlite4Utf16to8(sqlite4 *db, const void *z, int nByte, u8 enc){
  Mem m;
  memset(&m, 0, sizeof(m));
  m.db = db;
  sqlite4VdbeMemSetStr(&m, z, nByte, enc, SQLITE4_STATIC);
  sqlite4VdbeMemSetStr(&m, z, nByte, enc, SQLITE4_STATIC, 0);
  sqlite4VdbeChangeEncoding(&m, SQLITE4_UTF8);
  if( db->mallocFailed ){
    sqlite4VdbeMemRelease(&m);
    m.z = 0;
  }
  assert( (m.flags & MEM_Term)!=0 || db->mallocFailed );
  assert( (m.flags & MEM_Str)!=0 || db->mallocFailed );

** flag set.
*/
#ifdef SQLITE4_ENABLE_STAT3
char *sqlite4Utf8to16(sqlite4 *db, u8 enc, char *z, int n, int *pnOut){
  Mem m;
  memset(&m, 0, sizeof(m));
  m.db = db;
  sqlite4VdbeMemSetStr(&m, z, n, SQLITE4_UTF8, SQLITE4_STATIC);
  sqlite4VdbeMemSetStr(&m, z, n, SQLITE4_UTF8, SQLITE4_STATIC, 0);
  if( sqlite4VdbeMemTranslate(&m, enc) ){
    assert( db->mallocFailed );
    return 0;
  }
  assert( m.z==m.zMalloc );
  *pnOut = m.n;
  return m.z;

    db->errCode = err_code;
    if( zFormat ){
      char *z;
      va_list ap;
      va_start(ap, zFormat);
      z = sqlite4VMPrintf(db, zFormat, ap);
      va_end(ap);
      sqlite4ValueSetStr(db->pErr, -1, z, SQLITE4_UTF8, SQLITE4_DYNAMIC);
      sqlite4ValueSetStr(db->pErr, -1, z, SQLITE4_UTF8, SQLITE4_DYNAMIC, 0);
    }else{
      sqlite4ValueSetStr(db->pErr, 0, 0, SQLITE4_UTF8, SQLITE4_STATIC);
      sqlite4ValueSetStr(db->pErr, 0, 0, SQLITE4_UTF8, SQLITE4_STATIC, 0);
    }
  }
}

/*
** Add an error message to pParse->zErrMsg and increment pParse->nErr.
** The following formatting characters are allowed:

case OP_String8: {         /* same as TK_STRING, out2-prerelease */
  assert( pOp->p4.z!=0 );
  pOp->opcode = OP_String;
  pOp->p1 = sqlite4Strlen30(pOp->p4.z);

#ifndef SQLITE4_OMIT_UTF16
  if( encoding!=SQLITE4_UTF8 ){
    rc = sqlite4VdbeMemSetStr(pOut, pOp->p4.z, -1, SQLITE4_UTF8, SQLITE4_STATIC);
    rc = sqlite4VdbeMemSetStr(pOut, pOp->p4.z, -1, SQLITE4_UTF8,
                              SQLITE4_STATIC, 0);
    if( rc==SQLITE4_TOOBIG ) goto too_big;
    if( SQLITE4_OK!=sqlite4VdbeChangeEncoding(pOut, encoding) ) goto no_mem;
    assert( pOut->zMalloc==pOut->z );
    assert( pOut->flags & MEM_Dyn );
    pOut->zMalloc = 0;
    pOut->flags |= MEM_Static;
    pOut->flags &= ~MEM_Dyn;

/* Opcode: Blob P1 P2 * P4
**
** P4 points to a blob of data P1 bytes long.  Store this
** blob in register P2.
*/
case OP_Blob: {                /* out2-prerelease */
  assert( pOp->p1 <= SQLITE4_MAX_LENGTH );
  sqlite4VdbeMemSetStr(pOut, pOp->p4.z, pOp->p1, 0, 0);
  sqlite4VdbeMemSetStr(pOut, pOp->p4.z, pOp->p1, 0, 0, 0);
  pOut->enc = encoding;
  UPDATE_MAX_BLOBSIZE(pOut);
  break;
}

/* Opcode: Variable P1 P2 * P4 *
**

  if( rc ){
    sqlite4DbFree(db, aRec);
  }else{
    if( nSeq ){
      memcpy(&aRec[nRec], &aSeq[sizeof(aSeq)-nSeq], nSeq);
    }
    rc = sqlite4VdbeMemSetStr(pOut, (char *)aRec, nRec+nSeq, 0, SQLITE4_DYNAMIC);
    rc = sqlite4VdbeMemSetStr(pOut, (char *)aRec, nRec+nSeq, 0,
                              SQLITE4_DYNAMIC, 0);
    REGISTER_TRACE(pOp->p3, pOut);
    UPDATE_MAX_BLOBSIZE(pOut);
  }

  break;
}

    aRec = 0;
    rc = sqlite4VdbeEncodeKey(db, 
        pData0, pC->pKeyInfo->nField, pC->iRoot, pC->pKeyInfo, &aRec, &nRec, 0
    );
    if( rc ){
      sqlite4DbFree(db, aRec);
    }else{
      rc = sqlite4VdbeMemSetStr(pKeyOut, (char *)aRec, nRec, 0, SQLITE4_DYNAMIC);
      rc = sqlite4VdbeMemSetStr(pKeyOut, (char *)aRec, nRec, 0,
                                SQLITE4_DYNAMIC, 0);
      REGISTER_TRACE(keyReg, pKeyOut);
      UPDATE_MAX_BLOBSIZE(pKeyOut);
    }
  }

  /* If P3 is not 0, compute the data rescord */
  if( rc==SQLITE4_OK && pOp->p3 ){
    assert( pOp->p3<pOp->p1 || pOp->p3>=pOp->p1+pOp->p2 );
    pOut = &aMem[pOp->p3];
    memAboutToChange(p, pOut);
    aRec = 0;
    rc = sqlite4VdbeEncodeData(db, pData0, nField, &aRec, &nRec);
    if( rc ){
      sqlite4DbFree(db, aRec);
    }else{
      rc = sqlite4VdbeMemSetStr(pOut, (char *)aRec, nRec, 0, SQLITE4_DYNAMIC);
      rc = sqlite4VdbeMemSetStr(pOut, (char *)aRec, nRec, 0, SQLITE4_DYNAMIC,0);
      REGISTER_TRACE(pOp->p3, pOut);
      UPDATE_MAX_BLOBSIZE(pOut);
    }
  }
  break;
}

  pIn3 = &aMem[pOp->p3];
  if( (pIn3->flags & MEM_Blob) 
   && pIn3->n==nKey && 0==memcmp(pIn3->z, aKey, nKey) 
  ){
    pc = pOp->p2-1;
  }else{
    sqlite4VdbeMemSetStr(pIn3, (const char*)aKey, nKey, 0, SQLITE4_TRANSIENT);
    sqlite4VdbeMemSetStr(pIn3, (const char*)aKey, nKey, 0, SQLITE4_TRANSIENT,0);
  }

  break;
};

/* Opcode: SorterData P1 P2 * * *
**

    rc = sqlite4KVCursorKey(pCrsr, &pData, &nData);
  }else{
    rc = sqlite4KVCursorData(pCrsr, 0, -1, &pData, &nData);
  }
  if( rc==SQLITE4_OK && nData>db->aLimit[SQLITE4_LIMIT_LENGTH] ){
    goto too_big;
  }
  sqlite4VdbeMemSetStr(pOut, (const char*)pData, nData, 0, SQLITE4_TRANSIENT);
  sqlite4VdbeMemSetStr(pOut, (const char*)pData, nData, 0, SQLITE4_TRANSIENT,0);
  pOut->enc = SQLITE4_UTF8;  /* In case the blob is ever cast to text */
  UPDATE_MAX_BLOBSIZE(pOut);
  break;
}

/* Opcode: Rowid P1 P2 * * *
**

  CHECK_FOR_INTERRUPT;
  pIn1 = &aMem[pOp->p1];
  pOut = &aMem[pOp->p3];
  if( (pIn1->flags & MEM_RowSet)
   && (aKey = sqlite4RowSetRead(pIn1->u.pRowSet, &nKey))
  ){
    rc = sqlite4VdbeMemSetStr(pOut, (char const *)aKey, nKey, 0, SQLITE4_TRANSIENT);
    rc = sqlite4VdbeMemSetStr(pOut, (char const *)aKey, nKey, 0,
                              SQLITE4_TRANSIENT, 0);
    sqlite4RowSetNext(pIn1->u.pRowSet);
  }else{
    /* The RowSet is empty */
    sqlite4VdbeMemSetNull(pIn1);
    pc = pOp->p2 - 1;
  }

  int sqlite4VdbeAssertMayAbort(Vdbe *, int);
  void sqlite4VdbeTrace(Vdbe*,FILE*);
#endif
void sqlite4VdbeResetStepResult(Vdbe*);
void sqlite4VdbeRewind(Vdbe*);
int sqlite4VdbeReset(Vdbe*);
void sqlite4VdbeSetNumCols(Vdbe*,int);
int sqlite4VdbeSetColName(Vdbe*, int, int, const char *, void(*)(void*));
int sqlite4VdbeSetColName(Vdbe*, int, int, const char *, void(*)(void*,void*));
void sqlite4VdbeCountChanges(Vdbe*);
sqlite4 *sqlite4VdbeDb(Vdbe*);
void sqlite4VdbeSetSql(Vdbe*, const char *z, int n);
void sqlite4VdbeSwap(Vdbe*,Vdbe*);
VdbeOp *sqlite4VdbeTakeOpArray(Vdbe*, int*, int*);
sqlite4_value *sqlite4VdbeGetValue(Vdbe*, int, u8);
void sqlite4VdbeSetVarmask(Vdbe*, int);

  u16 flags;          /* Some combination of MEM_Null, MEM_Str, MEM_Dyn, etc. */
  u8  type;           /* One of SQLITE4_NULL, SQLITE4_TEXT, SQLITE4_INTEGER, etc */
  u8  enc;            /* SQLITE4_UTF8, SQLITE4_UTF16BE, SQLITE4_UTF16LE */
#ifdef SQLITE4_DEBUG
  Mem *pScopyFrom;    /* This Mem is a shallow copy of pScopyFrom */
  void *pFiller;      /* So that sizeof(Mem) is a multiple of 8 */
#endif
  void (*xDel)(void *);  /* If not null, call this function to delete Mem.z */
  void (*xDel)(void*,void*); /* Function to delete Mem.z */
  void *pDelArg;             /* First argument to xDel() */
  char *zMalloc;      /* Dynamic buffer allocated by sqlite4_malloc() */
};

/* One or more of the following flags are set to indicate the validOK
** representations of the value stored in the Mem struct.
**
** If the MEM_Null flag is set, then the value is an SQL NULL value.

** invocations.
*/
struct VdbeFunc {
  FuncDef *pFunc;               /* The definition of the function */
  int nAux;                     /* Number of entries allocated for apAux[] */
  struct AuxData {
    void *pAux;                   /* Aux data for the i-th argument */
    void (*xDelete)(void *);      /* Destructor for the aux data */
    void (*xDelete)(void*,void*); /* Destructor for the aux data */
    void *pDeleteArg;             /* First argument to xDelete */
  } apAux[1];                   /* One slot for each function argument */
};

/*
** The "context" argument for a installable function.  A pointer to an
** instance of this structure is the first argument to the routines used
** implement the SQL functions.

int sqlite4VdbeHalt(Vdbe*);
int sqlite4VdbeChangeEncoding(Mem *, int);
int sqlite4VdbeMemTooBig(Mem*);
int sqlite4VdbeMemCopy(Mem*, const Mem*);
void sqlite4VdbeMemShallowCopy(Mem*, const Mem*, int);
void sqlite4VdbeMemMove(Mem*, Mem*);
int sqlite4VdbeMemNulTerminate(Mem*);
int sqlite4VdbeMemSetStr(Mem*, const char*, int, u8, void(*)(void*));
int sqlite4VdbeMemSetStr(Mem*, const char*, int, u8,
                         void(*)(void*,void*),void*);
void sqlite4VdbeMemSetInt64(Mem*, i64);
#ifdef SQLITE4_OMIT_FLOATING_POINT
# define sqlite4VdbeMemSetDouble sqlite4VdbeMemSetInt64
#else
  void sqlite4VdbeMemSetDouble(Mem*, double);
#endif
void sqlite4VdbeMemSetNull(Mem*);

** the function result.
**
** The setStrOrError() funtion calls sqlite4VdbeMemSetStr() to store the
** result as a string or blob but if the string or blob is too large, it
** then sets the error code to SQLITE4_TOOBIG
*/
static void setResultStrOrError(
  sqlite4_context *pCtx,  /* Function context */
  const char *z,          /* String pointer */
  int n,                  /* Bytes in string, or negative */
  u8 enc,                 /* Encoding of z.  0 for BLOBs */
  void (*xDel)(void*)     /* Destructor function */
  sqlite4_context *pCtx,     /* Function context */
  const char *z,             /* String pointer */
  int n,                     /* Bytes in string, or negative */
  u8 enc,                    /* Encoding of z.  0 for BLOBs */
  void (*xDel)(void*,void*), /* Destructor function */
  void *pDelArg              /* First argument to xDel() */
){
  if( xDel==SQLITE4_DYNAMIC ){
    assert( sqlite4MemdebugHasType(z, MEMTYPE_HEAP) );
    assert( sqlite4MemdebugNoType(z, ~MEMTYPE_HEAP) );
    sqlite4MemdebugSetType((char*)z, MEMTYPE_DB | MEMTYPE_HEAP);
  }
  if( sqlite4VdbeMemSetStr(&pCtx->s, z, n, enc, xDel)==SQLITE4_TOOBIG ){
  if( sqlite4VdbeMemSetStr(&pCtx->s, z, n, enc, xDel,pDelArg)==SQLITE4_TOOBIG ){
    sqlite4_result_error_toobig(pCtx);
  }
}
void sqlite4_result_blob(
  sqlite4_context *pCtx, 
  const void *z, 
  int n, 
  void (*xDel)(void *)
  void (*xDel)(void*,void*),
  void *pDelArg
){
  assert( n>=0 );
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  setResultStrOrError(pCtx, z, n, 0, xDel);
  setResultStrOrError(pCtx, z, n, 0, xDel, pDelArg);
}
void sqlite4_result_double(sqlite4_context *pCtx, double rVal){
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  sqlite4VdbeMemSetDouble(&pCtx->s, rVal);
}
void sqlite4_result_error(sqlite4_context *pCtx, const char *z, int n){
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  pCtx->isError = SQLITE4_ERROR;
  sqlite4VdbeMemSetStr(&pCtx->s, z, n, SQLITE4_UTF8, SQLITE4_TRANSIENT);
  sqlite4VdbeMemSetStr(&pCtx->s, z, n, SQLITE4_UTF8, SQLITE4_TRANSIENT, 0);
}
#ifndef SQLITE4_OMIT_UTF16
void sqlite4_result_error16(sqlite4_context *pCtx, const void *z, int n){
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  pCtx->isError = SQLITE4_ERROR;
  sqlite4VdbeMemSetStr(&pCtx->s, z, n, SQLITE4_UTF16NATIVE, SQLITE4_TRANSIENT);
  sqlite4VdbeMemSetStr(&pCtx->s, z, n, SQLITE4_UTF16NATIVE,SQLITE4_TRANSIENT,0);
}
#endif
void sqlite4_result_int(sqlite4_context *pCtx, int iVal){
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  sqlite4VdbeMemSetInt64(&pCtx->s, (i64)iVal);
}
void sqlite4_result_int64(sqlite4_context *pCtx, i64 iVal){
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  sqlite4VdbeMemSetInt64(&pCtx->s, iVal);
}
void sqlite4_result_null(sqlite4_context *pCtx){
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  sqlite4VdbeMemSetNull(&pCtx->s);
}
void sqlite4_result_text(
  sqlite4_context *pCtx, 
  const char *z, 
  int n,
  void (*xDel)(void *)
  void (*xDel)(void*,void*),
  void *pDelArg
){
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  setResultStrOrError(pCtx, z, n, SQLITE4_UTF8, xDel);
  setResultStrOrError(pCtx, z, n, SQLITE4_UTF8, xDel, pDelArg);
}
#ifndef SQLITE4_OMIT_UTF16
void sqlite4_result_text16(
  sqlite4_context *pCtx, 
  const void *z, 
  int n, 
  void (*xDel)(void *)
  void (*xDel)(void*,void*),
  void *pDelArg
){
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  setResultStrOrError(pCtx, z, n, SQLITE4_UTF16NATIVE, xDel);
  setResultStrOrError(pCtx, z, n, SQLITE4_UTF16NATIVE, xDel, pDelArg);
}
void sqlite4_result_text16be(
  sqlite4_context *pCtx, 
  const void *z, 
  int n, 
  void (*xDel)(void *)
  void (*xDel)(void*,void*),
  void *pDelArg
){
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  setResultStrOrError(pCtx, z, n, SQLITE4_UTF16BE, xDel);
  setResultStrOrError(pCtx, z, n, SQLITE4_UTF16BE, xDel, pDelArg);
}
void sqlite4_result_text16le(
  sqlite4_context *pCtx, 
  const void *z, 
  int n, 
  void (*xDel)(void *)
  void (*xDel)(void*,void*),
  void *pDelArg
){
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  setResultStrOrError(pCtx, z, n, SQLITE4_UTF16LE, xDel);
  setResultStrOrError(pCtx, z, n, SQLITE4_UTF16LE, xDel, pDelArg);
}
#endif /* SQLITE4_OMIT_UTF16 */
void sqlite4_result_value(sqlite4_context *pCtx, sqlite4_value *pValue){
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  sqlite4VdbeMemCopy(&pCtx->s, pValue);
}
void sqlite4_result_zeroblob(sqlite4_context *pCtx, int n){
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  sqlite4VdbeMemSetZeroBlob(&pCtx->s, n);
}
void sqlite4_result_error_code(sqlite4_context *pCtx, int errCode){
  pCtx->isError = errCode;
  if( pCtx->s.flags & MEM_Null ){
    sqlite4VdbeMemSetStr(&pCtx->s, sqlite4ErrStr(errCode), -1, 
                         SQLITE4_UTF8, SQLITE4_STATIC);
                         SQLITE4_UTF8, SQLITE4_STATIC, 0);
  }
}

/* Force an SQLITE4_TOOBIG error. */
void sqlite4_result_error_toobig(sqlite4_context *pCtx){
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  pCtx->isError = SQLITE4_TOOBIG;
  sqlite4VdbeMemSetStr(&pCtx->s, "string or blob too big", -1, 
                       SQLITE4_UTF8, SQLITE4_STATIC);
                       SQLITE4_UTF8, SQLITE4_STATIC, 0);
}

/* An SQLITE4_NOMEM error. */
void sqlite4_result_error_nomem(sqlite4_context *pCtx){
  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  sqlite4VdbeMemSetNull(&pCtx->s);
  pCtx->isError = SQLITE4_NOMEM;

** argument to the user-function defined by pCtx. Any previous value is
** deleted by calling the delete function specified when it was set.
*/
void sqlite4_set_auxdata(
  sqlite4_context *pCtx, 
  int iArg, 
  void *pAux, 
  void (*xDelete)(void*)
  void (*xDelete)(void*,void*),
  void *pDeleteArg
){
  struct AuxData *pAuxData;
  VdbeFunc *pVdbeFunc;
  if( iArg<0 ) goto failed;

  assert( sqlite4_mutex_held(pCtx->s.db->mutex) );
  pVdbeFunc = pCtx->pVdbeFunc;

    memset(&pVdbeFunc->apAux[nAux], 0, sizeof(struct AuxData)*(iArg+1-nAux));
    pVdbeFunc->nAux = iArg+1;
    pVdbeFunc->pFunc = pCtx->pFunc;
  }

  pAuxData = &pVdbeFunc->apAux[iArg];
  if( pAuxData->pAux && pAuxData->xDelete ){
    pAuxData->xDelete(pAuxData->pAux);
    pAuxData->xDelete(pAuxData->pDeleteArg, pAuxData->pAux);
  }
  pAuxData->pAux = pAux;
  pAuxData->xDelete = xDelete;
  pAuxData->pDeleteArg = pDeleteArg;
  return;

failed:
  if( xDelete ){
    xDelete(pAux);
    xDelete(pDeleteArg, pAux);
  }
}

#ifndef SQLITE4_OMIT_DEPRECATED
/*
** Return the number of times the Step function of a aggregate has been 
** called.

  return SQLITE4_OK;
}

/*
** Bind a text or BLOB value.
*/
static int bindText(
  sqlite4_stmt *pStmt,   /* The statement to bind against */
  int i,                 /* Index of the parameter to bind */
  const void *zData,     /* Pointer to the data to be bound */
  int nData,             /* Number of bytes of data to be bound */
  void (*xDel)(void*),   /* Destructor for the data */
  u8 encoding            /* Encoding for the data */
  sqlite4_stmt *pStmt,       /* The statement to bind against */
  int i,                     /* Index of the parameter to bind */
  const void *zData,         /* Pointer to the data to be bound */
  int nData,                 /* Number of bytes of data to be bound */
  void (*xDel)(void*,void*), /* Destructor for the data */
  void *pDelArg,             /* First argument to xDel() */
  u8 encoding                /* Encoding for the data */
){
  Vdbe *p = (Vdbe *)pStmt;
  Mem *pVar;
  int rc;

  rc = vdbeUnbind(p, i);
  if( rc==SQLITE4_OK ){
    if( zData!=0 ){
      pVar = &p->aVar[i-1];
      rc = sqlite4VdbeMemSetStr(pVar, zData, nData, encoding, xDel);
      rc = sqlite4VdbeMemSetStr(pVar, zData, nData, encoding, xDel, pDelArg);
      if( rc==SQLITE4_OK && encoding!=0 ){
        rc = sqlite4VdbeChangeEncoding(pVar, ENC(p->db));
      }
      sqlite4Error(p->db, rc, 0);
      rc = sqlite4ApiExit(p->db, rc);
    }
    sqlite4_mutex_leave(p->db->mutex);
  }else if( xDel!=SQLITE4_STATIC && xDel!=SQLITE4_TRANSIENT ){
    xDel((void*)zData);
    xDel(pDelArg, (void*)zData);
  }
  return rc;
}


/*
** Bind a blob value to an SQL statement variable.
*/
int sqlite4_bind_blob(
  sqlite4_stmt *pStmt, 
  int i, 
  const void *zData, 
  int nData, 
  void (*xDel)(void*)
  void (*xDel)(void*,void*),
  void *pDelArg
){
  return bindText(pStmt, i, zData, nData, xDel, 0);
  return bindText(pStmt, i, zData, nData, xDel, pDelArg, 0);
}
int sqlite4_bind_double(sqlite4_stmt *pStmt, int i, double rValue){
  int rc;
  Vdbe *p = (Vdbe *)pStmt;
  rc = vdbeUnbind(p, i);
  if( rc==SQLITE4_OK ){
    sqlite4VdbeMemSetDouble(&p->aVar[i-1], rValue);

  return rc;
}
int sqlite4_bind_text( 
  sqlite4_stmt *pStmt, 
  int i, 
  const char *zData, 
  int nData, 
  void (*xDel)(void*)
  void (*xDel)(void*,void*),
  void *pDelArg
){
  return bindText(pStmt, i, zData, nData, xDel, SQLITE4_UTF8);
  return bindText(pStmt, i, zData, nData, xDel, pDelArg, SQLITE4_UTF8);
}
#ifndef SQLITE4_OMIT_UTF16
int sqlite4_bind_text16(
  sqlite4_stmt *pStmt, 
  int i, 
  const void *zData, 
  int nData, 
  void (*xDel)(void*)
  void (*xDel)(void*,void*),
  void *pDelArg
){
  return bindText(pStmt, i, zData, nData, xDel, SQLITE4_UTF16NATIVE);
  return bindText(pStmt, i, zData, nData, xDel, pDelArg, SQLITE4_UTF16NATIVE);
}
#endif /* SQLITE4_OMIT_UTF16 */
int sqlite4_bind_value(sqlite4_stmt *pStmt, int i, const sqlite4_value *pValue){
  int rc;
  switch( pValue->type ){
    case SQLITE4_INTEGER: {
      rc = sqlite4_bind_int64(pStmt, i, pValue->u.i);
      break;
    }
    case SQLITE4_FLOAT: {
      rc = sqlite4_bind_double(pStmt, i, pValue->r);
      break;
    }
    case SQLITE4_BLOB: {
      if( pValue->flags & MEM_Zero ){
        rc = sqlite4_bind_zeroblob(pStmt, i, pValue->u.nZero);
      }else{
        rc = sqlite4_bind_blob(pStmt, i, pValue->z, pValue->n,SQLITE4_TRANSIENT);
        rc = sqlite4_bind_blob(pStmt, i, pValue->z, pValue->n,
                               SQLITE4_TRANSIENT, 0);
      }
      break;
    }
    case SQLITE4_TEXT: {
      rc = bindText(pStmt,i,  pValue->z, pValue->n, SQLITE4_TRANSIENT,
      rc = bindText(pStmt,i,  pValue->z, pValue->n, SQLITE4_TRANSIENT, 0,
                              pValue->enc);
      break;
    }
    default: {
      rc = sqlite4_bind_null(pStmt, i);
      break;
    }

    if( sqlite4VdbeMemGrow(pMem, 32, 0) ){            /* P4 */
      assert( p->db->mallocFailed );
      return SQLITE4_ERROR;
    }
    pMem->flags = MEM_Dyn|MEM_Str|MEM_Term;
    z = displayP4(pOp, pMem->z, 32);
    if( z!=pMem->z ){
      sqlite4VdbeMemSetStr(pMem, z, -1, SQLITE4_UTF8, 0);
      sqlite4VdbeMemSetStr(pMem, z, -1, SQLITE4_UTF8, 0, 0);
    }else{
      assert( pMem->z!=0 );
      pMem->n = sqlite4Strlen30(pMem->z);
      pMem->enc = SQLITE4_UTF8;
    }
    pMem->type = SQLITE4_TEXT;
    pMem++;

** to by zName will be freed by sqlite4DbFree() when the vdbe is destroyed.
*/
int sqlite4VdbeSetColName(
  Vdbe *p,                         /* Vdbe being configured */
  int idx,                         /* Index of column zName applies to */
  int var,                         /* One of the COLNAME_* constants */
  const char *zName,               /* Pointer to buffer containing name */
  void (*xDel)(void*)              /* Memory management strategy for zName */
  void (*xDel)(void*,void*)        /* Memory management strategy for zName */
){
  int rc;
  Mem *pColName;
  assert( idx<p->nResColumn );
  assert( var<COLNAME_N );
  assert( xDel==SQLITE4_STATIC || xDel==SQLITE4_TRANSIENT
             || xDel==SQLITE4_DYNAMIC );
  if( p->db->mallocFailed ){
    assert( !zName || xDel!=SQLITE4_DYNAMIC );
    return SQLITE4_NOMEM;
  }
  assert( p->aColName!=0 );
  pColName = &(p->aColName[idx+var*p->nResColumn]);
  rc = sqlite4VdbeMemSetStr(pColName, zName, -1, SQLITE4_UTF8, xDel);
  rc = sqlite4VdbeMemSetStr(pColName, zName, -1, SQLITE4_UTF8, xDel, 0);
  assert( rc!=0 || !zName || (pColName->flags&MEM_Term)!=0 );
  return rc;
}

/*
** Free all Savepoint structures that correspond to transaction levels
** larger than iLevel. Passing iLevel==1 deletes all Savepoint structures.

*/
int sqlite4VdbeTransferError(Vdbe *p){
  sqlite4 *db = p->db;
  int rc = p->rc;
  if( p->zErrMsg ){
    u8 mallocFailed = db->mallocFailed;
    sqlite4BeginBenignMalloc(db->pEnv);
    sqlite4ValueSetStr(db->pErr, -1, p->zErrMsg, SQLITE4_UTF8, SQLITE4_TRANSIENT);
    sqlite4ValueSetStr(db->pErr, -1, p->zErrMsg, SQLITE4_UTF8,
                       SQLITE4_TRANSIENT, 0);
    sqlite4EndBenignMalloc(db->pEnv);
    db->mallocFailed = mallocFailed;
    db->errCode = rc;
  }else{
    sqlite4Error(db, rc, 0);
  }
  return rc;

    if( p->runOnlyOnce ) p->expired = 1;
  }else if( p->rc && p->expired ){
    /* The expired flag was set on the VDBE before the first call
    ** to sqlite4_step(). For consistency (since sqlite4_step() was
    ** called), set the database error in this case as well.
    */
    sqlite4Error(db, p->rc, 0);
    sqlite4ValueSetStr(db->pErr, -1, p->zErrMsg, SQLITE4_UTF8, SQLITE4_TRANSIENT);
    sqlite4ValueSetStr(db->pErr, -1, p->zErrMsg, SQLITE4_UTF8,
                       SQLITE4_TRANSIENT, 0);
    sqlite4DbFree(db, p->zErrMsg);
    p->zErrMsg = 0;
  }

  /* Reclaim all memory used by the VDBE
  */
  Cleanup(p);

*/
void sqlite4VdbeDeleteAuxData(VdbeFunc *pVdbeFunc, int mask){
  int i;
  for(i=0; i<pVdbeFunc->nAux; i++){
    struct AuxData *pAux = &pVdbeFunc->apAux[i];
    if( (i>31 || !(mask&(((u32)1)<<i))) && pAux->pAux ){
      if( pAux->xDelete ){
        pAux->xDelete(pAux->pAux);
        pAux->xDelete(pAux->pDeleteArg, pAux->pAux);
      }
      pAux->pAux = 0;
    }
  }
}

/*

        e = e>>2;
        while( e>=10 ){ r *= 1.0e10; e -= 10; }
        while( e>0 ){ r *= 10.0; e--; }
      }
      sqlite4VdbeMemSetDouble(pOut, r);
    }else if( cclass==0 ){
      if( size==0 ){
        sqlite4VdbeMemSetStr(pOut, "", 0, SQLITE4_UTF8, SQLITE4_TRANSIENT);
        sqlite4VdbeMemSetStr(pOut, "", 0, SQLITE4_UTF8, SQLITE4_TRANSIENT, 0);
      }else if( p->a[ofst]>0x02 ){
        sqlite4VdbeMemSetStr(pOut, (char*)(p->a+ofst), size, 
                             SQLITE4_UTF8, SQLITE4_TRANSIENT);
                             SQLITE4_UTF8, SQLITE4_TRANSIENT, 0);
      }else{
        static const u8 enc[] = {SQLITE4_UTF8,SQLITE4_UTF16LE,SQLITE4_UTF16BE };
        sqlite4VdbeMemSetStr(pOut, (char*)(p->a+ofst+1), size-1, 
                             enc[p->a[ofst]], SQLITE4_TRANSIENT);
                             enc[p->a[ofst]], SQLITE4_TRANSIENT, 0);
      }
    }else{
      sqlite4VdbeMemSetStr(pOut, (char*)(p->a+ofst), size, 0,SQLITE4_TRANSIENT);
      sqlite4VdbeMemSetStr(pOut, (char*)(p->a+ofst), size, 0,
                           SQLITE4_TRANSIENT, 0);
    }
  }
  testcase( i==iVal );
  testcase( i==iVal+1 );
  if( i<=iVal ){
    if( pDefault ){
      sqlite4VdbeMemShallowCopy(pOut, pDefault, MEM_Static);

  }

  if( pMem->z && preserve && pMem->zMalloc && pMem->z!=pMem->zMalloc ){
    memcpy(pMem->zMalloc, pMem->z, pMem->n);
  }
  if( pMem->flags&MEM_Dyn && pMem->xDel ){
    assert( pMem->xDel!=SQLITE4_DYNAMIC );
    pMem->xDel((void *)(pMem->z));
    pMem->xDel(pMem->pDelArg, (void *)(pMem->z));
  }

  pMem->z = pMem->zMalloc;
  if( pMem->z==0 ){
    pMem->flags = MEM_Null;
  }else{
    pMem->flags &= ~(MEM_Ephem|MEM_Static);

  if( p->flags&MEM_Agg ){
    sqlite4VdbeMemFinalize(p, p->u.pDef);
    assert( (p->flags & MEM_Agg)==0 );
    sqlite4VdbeMemRelease(p);
  }else if( p->flags&MEM_Dyn && p->xDel ){
    assert( (p->flags&MEM_RowSet)==0 );
    assert( p->xDel!=SQLITE4_DYNAMIC );
    p->xDel((void *)p->z);
    p->xDel(p->pDelArg, (void *)p->z);
    p->xDel = 0;
  }else if( p->flags&MEM_RowSet ){
    sqlite4RowSetClear(p->u.pRowSet);
  }else if( p->flags&MEM_Frame ){
    sqlite4VdbeMemSetNull(p);
  }
}

** If the string is too large (if it exceeds the SQLITE4_LIMIT_LENGTH
** size limit) then no memory allocation occurs.  If the string can be
** stored without allocating memory, then it is.  If a memory allocation
** is required to store the string, then value of pMem is unchanged.  In
** either case, SQLITE4_TOOBIG is returned.
*/
int sqlite4VdbeMemSetStr(
  Mem *pMem,          /* Memory cell to set to string value */
  const char *z,      /* String pointer */
  int n,              /* Bytes in string, or negative */
  u8 enc,             /* Encoding of z.  0 for BLOBs */
  void (*xDel)(void*) /* Destructor function */
  Mem *pMem,                /* Memory cell to set to string value */
  const char *z,            /* String pointer */
  int n,                    /* Bytes in string, or negative */
  u8 enc,                   /* Encoding of z.  0 for BLOBs */
  void (*xDel)(void*,void*),/* Destructor function */
  void *pDelArg             /* First argument to xDel() */
){
  int nByte = n;      /* New value for pMem->n */
  int iLimit;         /* Maximum allowed string or blob size */
  u16 flags = 0;      /* New value for pMem->flags */

  assert( pMem->db==0 || sqlite4_mutex_held(pMem->db->mutex) );
  assert( (pMem->flags & MEM_RowSet)==0 );

    sqlite4VdbeMemRelease(pMem);
    pMem->zMalloc = pMem->z = (char *)z;
    pMem->xDel = 0;
  }else{
    sqlite4VdbeMemRelease(pMem);
    pMem->z = (char *)z;
    pMem->xDel = xDel;
    pMem->pDelArg = pDelArg;
    flags |= ((xDel==SQLITE4_STATIC)?MEM_Static:MEM_Dyn);
  }

  pMem->n = nByte;
  pMem->flags = flags;
  pMem->enc = (enc==0 ? SQLITE4_UTF8 : enc);
  pMem->type = (enc==0 ? SQLITE4_BLOB : SQLITE4_TEXT);

    pVal = sqlite4ValueNew(db);
    if( pVal==0 ) goto no_mem;
    if( ExprHasProperty(pExpr, EP_IntValue) ){
      sqlite4VdbeMemSetInt64(pVal, (i64)pExpr->u.iValue*negInt);
    }else{
      zVal = sqlite4MPrintf(db, "%s%s", zNeg, pExpr->u.zToken);
      if( zVal==0 ) goto no_mem;
      sqlite4ValueSetStr(pVal, -1, zVal, SQLITE4_UTF8, SQLITE4_DYNAMIC);
      sqlite4ValueSetStr(pVal, -1, zVal, SQLITE4_UTF8, SQLITE4_DYNAMIC, 0);
      if( op==TK_FLOAT ) pVal->type = SQLITE4_FLOAT;
    }
    if( (op==TK_INTEGER || op==TK_FLOAT ) && affinity==SQLITE4_AFF_NONE ){
      sqlite4ValueApplyAffinity(pVal, SQLITE4_AFF_NUMERIC, SQLITE4_UTF8);
    }else{
      sqlite4ValueApplyAffinity(pVal, affinity, SQLITE4_UTF8);
    }

    assert( pExpr->u.zToken[1]=='\'' );
    pVal = sqlite4ValueNew(db);
    if( !pVal ) goto no_mem;
    zVal = &pExpr->u.zToken[2];
    nVal = sqlite4Strlen30(zVal)-1;
    assert( zVal[nVal]=='\'' );
    sqlite4VdbeMemSetStr(pVal, sqlite4HexToBlob(db, zVal, nVal), nVal/2,
                         0, SQLITE4_DYNAMIC);
                         0, SQLITE4_DYNAMIC, 0);
  }
#endif

  if( pVal ){
    sqlite4VdbeMemStoreType(pVal);
  }
  *ppVal = pVal;

  return SQLITE4_NOMEM;
}

/*
** Change the string value of an sqlite4_value object
*/
void sqlite4ValueSetStr(
  sqlite4_value *v,     /* Value to be set */
  int n,                /* Length of string z */
  const void *z,        /* Text of the new string */
  u8 enc,               /* Encoding to use */
  void (*xDel)(void*)   /* Destructor for the string */
  sqlite4_value *v,          /* Value to be set */
  int n,                     /* Length of string z */
  const void *z,             /* Text of the new string */
  u8 enc,                    /* Encoding to use */
  void (*xDel)(void*,void*), /* Destructor for the string */
  void *pDelArg              /* First argument to xDel() */
){
  if( v ) sqlite4VdbeMemSetStr((Mem *)v, z, n, enc, xDel);
  if( v ) sqlite4VdbeMemSetStr((Mem *)v, z, n, enc, xDel, pDelArg);
}

/*
** Free an sqlite4_value object
*/
void sqlite4ValueFree(sqlite4_value *v){
  if( !v ) return;

      }else if( pVar->flags & MEM_Str ){
#ifndef SQLITE4_OMIT_UTF16
        u8 enc = ENC(db);
        if( enc!=SQLITE4_UTF8 ){
          Mem utf8;
          memset(&utf8, 0, sizeof(utf8));
          utf8.db = db;
          sqlite4VdbeMemSetStr(&utf8, pVar->z, pVar->n, enc, SQLITE4_STATIC);
          sqlite4VdbeMemSetStr(&utf8, pVar->z, pVar->n, enc, SQLITE4_STATIC, 0);
          sqlite4VdbeChangeEncoding(&utf8, SQLITE4_UTF8);
          sqlite4XPrintf(&out, "'%.*q'", utf8.n, utf8.z);
          sqlite4VdbeMemRelease(&utf8);
        }else
#endif
        {
          sqlite4XPrintf(&out, "'%.*q'", pVar->n, pVar->z);

  }
  assert( n<sizeof(zBuf) );
  sqlite4_randomness(pEnv, n, zBuf);
  for(i=0; i<n; i++){
    zBuf[i] = zSrc[zBuf[i]%(sizeof(zSrc)-1)];
  }
  zBuf[n] = 0;
  sqlite4_result_text(context, (char*)zBuf, n, SQLITE4_TRANSIENT);
  sqlite4_result_text(context, (char*)zBuf, n, SQLITE4_TRANSIENT, 0);
}

/*
** The following two SQL functions are used to test returning a text
** result with a destructor. Function 'test_destructor' takes one argument
** and returns the same argument interpreted as TEXT. A destructor is
** passed with the sqlite4_result_text() call.
**
** SQL function 'test_destructor_count' returns the number of outstanding 
** allocations made by 'test_destructor';
**
** WARNING: Not threadsafe.
*/
static int test_destructor_count_var = 0;
static void destructor(void *p){
static void destructor(void *pNotUsed, void *p){
  char *zVal = (char *)p;
  assert(zVal);
  zVal--;
  sqlite4_free(0, zVal);
  test_destructor_count_var--;
}
static void test_destructor(

  if( !zVal ){
    return;
  }
  zVal[len+1] = 0;
  zVal[len+2] = 0;
  zVal++;
  memcpy(zVal, sqlite4_value_text(argv[0]), len);
  sqlite4_result_text(pCtx, zVal, -1, destructor);
  sqlite4_result_text(pCtx, zVal, -1, destructor, 0);
}
#ifndef SQLITE4_OMIT_UTF16
static void test_destructor16(
  sqlite4_context *pCtx, 
  int nArg,
  sqlite4_value **argv
){

  if( !zVal ){
    return;
  }
  zVal[len+1] = 0;
  zVal[len+2] = 0;
  zVal++;
  memcpy(zVal, sqlite4_value_text16(argv[0]), len);
  sqlite4_result_text16(pCtx, zVal, -1, destructor);
  sqlite4_result_text16(pCtx, zVal, -1, destructor, 0);
}
#endif
static void test_destructor_count(
  sqlite4_context *pCtx, 
  int nArg,
  sqlite4_value **argv
){

#ifndef SQLITE4_OMIT_UTF16
  const void *z;
  sqlite4 * db = sqlite4_context_db_handle(ctx);
  sqlite4_aggregate_context(ctx, 2048);
  sqlite4BeginBenignMalloc();
  z = sqlite4_errmsg16(db);
  sqlite4EndBenignMalloc();
  sqlite4_result_text16(ctx, z, -1, SQLITE4_TRANSIENT);
  sqlite4_result_text16(ctx, z, -1, SQLITE4_TRANSIENT, 0);
#endif
}

/*
** Routines for testing the sqlite4_get_auxdata() and sqlite4_set_auxdata()
** interface.
**
** The test_auxdata() SQL function attempts to register each of its arguments
** as auxiliary data.  If there are no prior registrations of aux data for
** that argument (meaning the argument is not a constant or this is its first
** call) then the result for that argument is 0.  If there is a prior
** registration, the result for that argument is 1.  The overall result
** is the individual argument results separated by spaces.
*/
static void free_test_auxdata(void *p) {sqlite4_free(0, p);}
static void free_test_auxdata(void *pEnv, void *p){
  sqlite4_free((sqlite4_env*)pEnv, p);
}
static void test_auxdata(
  sqlite4_context *pCtx, 
  int nArg,
  sqlite4_value **argv
){
  int i;
  char *zRet = testContextMalloc(pCtx, nArg*2);
  sqlite4_env *pEnv;
  if( !zRet ) return;
  memset(zRet, 0, nArg*2);
  for(i=0; i<nArg; i++){
    char const *z = (char*)sqlite4_value_text(argv[i]);
    if( z ){
      int n;
      char *zAux = sqlite4_get_auxdata(pCtx, i);
      if( zAux ){
        zRet[i*2] = '1';
        assert( strcmp(zAux,z)==0 );
      }else {
        zRet[i*2] = '0';
      }
      n = strlen(z) + 1;
      zAux = testContextMalloc(pCtx, n);
      if( zAux ){
        memcpy(zAux, z, n);
        sqlite4_set_auxdata(pCtx, i, zAux, free_test_auxdata);
        sqlite4_set_auxdata(pCtx, i, zAux,
                            free_test_auxdata, sqlite4_context_env(pCtx));
      }
      zRet[i*2+1] = ' ';
    }
  }
  sqlite4_result_text(pCtx, zRet, 2*nArg-1, free_test_auxdata);
  sqlite4_result_text(pCtx, zRet, 2*nArg-1,
                      free_test_auxdata, sqlite4_context_env(pCtx));
}

/*
** A function to test error reporting from user functions. This function
** returns a copy of its first argument as the error message.  If the
** second argument exists, it becomes the error code.
*/

    sqlite4_result_error_code(pCtx, sqlite4_value_int(argv[1]));
  }
}

/* A counter object with its destructor.  Used by counterFunc() below.
*/
struct counterObject { int cnt; sqlite4_env *pEnv; };
void counterFree(void *x){
void counterFree(void *NotUsed, void *x){
  struct counterObject *p = (struct counterObject*)x;
  sqlite4_free(p->pEnv, p);
}

/*
** Implementation of the counter(X) function.  If X is an integer
** constant, then the first invocation will return X.  The second X+1.

    pCounter = sqlite4_malloc(sqlite4_context_env(pCtx), sizeof(*pCounter) );
    if( pCounter==0 ){
      sqlite4_result_error_nomem(pCtx);
      return;
    }
    pCounter->cnt = sqlite4_value_int(argv[0]);
    pCounter->pEnv = sqlite4_context_env(pCtx);
    sqlite4_set_auxdata(pCtx, 0, pCounter, counterFree);
    sqlite4_set_auxdata(pCtx, 0, pCounter, counterFree, 0);
  }else{
    pCounter->cnt++;
  }
  sqlite4_result_int(pCtx, pCounter->cnt);
}

  }
  if( rc ){
    char *zErr;
    sqlite4_env *pEnv = sqlite4_context_env(pCtx);
    assert( pStmt==0 );
    zErr = sqlite4_mprintf(pEnv, "sqlite4_prepare() error: %s",
                           sqlite4_errmsg(db));
    sqlite4_result_text(pCtx, zErr, -1, SQLITE4_DYNAMIC);
    sqlite4_result_text(pCtx, zErr, -1, SQLITE4_DYNAMIC, 0);
    sqlite4_result_error_code(pCtx, rc);
  }
}


/*
** convert one character from hex to binary

  n = sqlite4_value_bytes(argv[0]);
  zIn = (const char*)sqlite4_value_text(argv[0]);
  zOut = sqlite4_malloc(sqlite4_context_env(pCtx), n/2 );
  if( zOut==0 ){
    sqlite4_result_error_nomem(pCtx);
  }else{
    testHexToBin(zIn, zOut);
    sqlite4_result_text16be(pCtx, zOut, n/2, SQLITE4_DYNAMIC);
    sqlite4_result_text16be(pCtx, zOut, n/2, SQLITE4_DYNAMIC, 0);
  }
}
#endif

/*
**      hex_to_utf8(HEX)
**

  n = sqlite4_value_bytes(argv[0]);
  zIn = (const char*)sqlite4_value_text(argv[0]);
  zOut = sqlite4_malloc(sqlite4_context_env(pCtx), n/2 );
  if( zOut==0 ){
    sqlite4_result_error_nomem(pCtx);
  }else{
    testHexToBin(zIn, zOut);
    sqlite4_result_text(pCtx, zOut, n/2, SQLITE4_DYNAMIC);
    sqlite4_result_text(pCtx, zOut, n/2, SQLITE4_DYNAMIC, 0);
  }
}

/*
**      hex_to_utf16le(HEX)
**
** Convert the input string from HEX into binary.  Then return the

  n = sqlite4_value_bytes(argv[0]);
  zIn = (const char*)sqlite4_value_text(argv[0]);
  zOut = sqlite4_malloc(sqlite4_context_env(pCtx), n/2 );
  if( zOut==0 ){
    sqlite4_result_error_nomem(pCtx);
  }else{
    testHexToBin(zIn, zOut);
    sqlite4_result_text16le(pCtx, zOut, n/2, SQLITE4_DYNAMIC);
    sqlite4_result_text16le(pCtx, zOut, n/2, SQLITE4_DYNAMIC, 0);
  }
}
#endif

static int registerTestFunctions(sqlite4 *db){
  static const struct {
     char *zName;

  sqlite4_value **argv
){
  int i;
  for(i=0; i<argc; i++){
    if( SQLITE4_NULL!=sqlite4_value_type(argv[i]) ){
      int n = sqlite4_value_bytes(argv[i]);
      sqlite4_result_text(context, (char*)sqlite4_value_text(argv[i]),
          n, SQLITE4_TRANSIENT);
          n, SQLITE4_TRANSIENT, 0);
      break;
    }
  }
}

/*
** These are test functions.    hex8() interprets its argument as
** UTF8 and returns a hex encoding.  hex16le() interprets its argument
** as UTF16le and returns a hex encoding.
*/
static void hex8Func(sqlite4_context *p, int argc, sqlite4_value **argv){
  const unsigned char *z;
  int i;
  char zBuf[200];
  z = sqlite4_value_text(argv[0]);
  for(i=0; i<sizeof(zBuf)/2 - 2 && z[i]; i++){
    sprintf(&zBuf[i*2], "%02x", z[i]&0xff);
  }
  zBuf[i*2] = 0;
  sqlite4_result_text(p, (char*)zBuf, -1, SQLITE4_TRANSIENT);
  sqlite4_result_text(p, (char*)zBuf, -1, SQLITE4_TRANSIENT, 0);
}
#ifndef SQLITE4_OMIT_UTF16
static void hex16Func(sqlite4_context *p, int argc, sqlite4_value **argv){
  const unsigned short int *z;
  int i;
  char zBuf[400];
  z = sqlite4_value_text16(argv[0]);
  for(i=0; i<sizeof(zBuf)/4 - 4 && z[i]; i++){
    sprintf(&zBuf[i*4], "%04x", z[i]&0xff);
  }
  zBuf[i*4] = 0;
  sqlite4_result_text(p, (char*)zBuf, -1, SQLITE4_TRANSIENT);
  sqlite4_result_text(p, (char*)zBuf, -1, SQLITE4_TRANSIENT, 0);
}
#endif

/*
** A structure into which to accumulate text.
*/
struct dstr {

  sqlite4_value **argv
){
  struct dstr x;
  memset(&x, 0, sizeof(x));
  (void)sqlite4_exec((sqlite4*)sqlite4_user_data(context),
      (char*)sqlite4_value_text(argv[0]),
      execFuncCallback, &x, 0);
  sqlite4_result_text(context, x.z, x.nUsed, SQLITE4_TRANSIENT);
  sqlite4_result_text(context, x.z, x.nUsed, SQLITE4_TRANSIENT, 0);
  sqlite4_free(0, x.z);
}

/*
** Implementation of tkt2213func(), a scalar function that takes exactly
** one argument. It has two interesting features:
**

  zText3 = sqlite4_value_text(argv[0]);

  if( zText1!=zText2 || zText2!=zText3 ){
    sqlite4_result_error(context, "tkt2213 is not fixed", -1);
  }else{
    char *zCopy = (char *)sqlite4_malloc(sqlite4_context_env(context),nText);
    memcpy(zCopy, zText1, nText);
    sqlite4_result_text(context, zCopy, nText, SQLITE4_DYNAMIC);
    sqlite4_result_text(context, zCopy, nText, SQLITE4_DYNAMIC, 0);
  }
}

/*
** The following SQL function takes 4 arguments.  The 2nd and
** 4th argument must be one of these strings:  'text', 'text16',
** or 'blob' corresponding to API functions

  /* Use the sqlite4_create_function16() API here. Mainly for fun, but also 
  ** because it is not tested anywhere else. */
  if( rc==SQLITE4_OK ){
    const void *zUtf16;
    sqlite4_value *pVal;
    sqlite4_mutex_enter(db->mutex);
    pVal = sqlite4ValueNew(db);
    sqlite4ValueSetStr(pVal, -1, "x_sqlite_exec", SQLITE4_UTF8, SQLITE4_STATIC);
    sqlite4ValueSetStr(pVal, -1, "x_sqlite_exec", SQLITE4_UTF8,
                       SQLITE4_STATIC, 0);
    zUtf16 = sqlite4ValueText(pVal, SQLITE4_UTF16NATIVE);
    if( db->mallocFailed ){
      rc = SQLITE4_NOMEM;
    }else{
      rc = sqlite4_create_function16(db, zUtf16, 
                1, SQLITE4_UTF16, db, sqlite4ExecFunc, 0, 0);
    }

    if( zArg0 ){
      if( 0==sqlite4_stricmp(zArg0, "int") ){
        sqlite4_result_int(context, sqlite4_value_int(argv[1]));
      }else if( sqlite4_stricmp(zArg0,"int64")==0 ){
        sqlite4_result_int64(context, sqlite4_value_int64(argv[1]));
      }else if( sqlite4_stricmp(zArg0,"string")==0 ){
        sqlite4_result_text(context, (char*)sqlite4_value_text(argv[1]), -1,
            SQLITE4_TRANSIENT);
            SQLITE4_TRANSIENT, 0);
      }else if( sqlite4_stricmp(zArg0,"double")==0 ){
        sqlite4_result_double(context, sqlite4_value_double(argv[1]));
      }else if( sqlite4_stricmp(zArg0,"null")==0 ){
        sqlite4_result_null(context);
      }else if( sqlite4_stricmp(zArg0,"value")==0 ){
        sqlite4_result_value(context, argv[sqlite4_value_int(argv[1])]);
      }else{

    return TCL_ERROR;
  }
  if( getStmtPointer(interp, argv[1], &pStmt) ) return TCL_ERROR;
  if( Tcl_GetInt(interp, argv[2], &idx) ) return TCL_ERROR;
  if( strcmp(argv[4],"null")==0 ){
    rc = sqlite4_bind_null(pStmt, idx);
  }else if( strcmp(argv[4],"static")==0 ){
    rc = sqlite4_bind_text(pStmt, idx, sqlite_static_bind_value, -1, 0);
    rc = sqlite4_bind_text(pStmt, idx, sqlite_static_bind_value, -1, 0, 0);
  }else if( strcmp(argv[4],"static-nbytes")==0 ){
    rc = sqlite4_bind_text(pStmt, idx, sqlite_static_bind_value,
                                       sqlite_static_bind_nbyte, 0);
                                       sqlite_static_bind_nbyte, 0, 0);
  }else if( strcmp(argv[4],"normal")==0 ){
    rc = sqlite4_bind_text(pStmt, idx, argv[3], -1, SQLITE4_TRANSIENT);
    rc = sqlite4_bind_text(pStmt, idx, argv[3], -1, SQLITE4_TRANSIENT, 0);
  }else if( strcmp(argv[4],"blob10")==0 ){
    rc = sqlite4_bind_text(pStmt, idx, "abc\000xyz\000pq", 10, SQLITE4_STATIC);
    rc = sqlite4_bind_text(pStmt, idx, "abc\000xyz\000pq", 10,SQLITE4_STATIC,0);
  }else{
    Tcl_AppendResult(interp, "4th argument should be "
        "\"null\" or \"static\" or \"normal\"", 0);
    return TCL_ERROR;
  }
  if( sqlite4TestErrCode(interp, StmtToDb(pStmt), rc) ) return TCL_ERROR;
  if( rc ){

    default:
      assert(0);
  }

  sqlite4BeginBenignMalloc(pEnv);
  pVal = sqlite4ValueNew(0);
  if( pVal ){
    sqlite4ValueSetStr(pVal, nA, zA, encin, SQLITE4_STATIC);
    sqlite4ValueSetStr(pVal, nA, zA, encin, SQLITE4_STATIC, 0);
    n = sqlite4_value_bytes(pVal);
    Tcl_ListObjAppendElement(i,pX,
        Tcl_NewStringObj((char*)sqlite4_value_text(pVal),n));
    sqlite4ValueSetStr(pVal, nB, zB, encin, SQLITE4_STATIC);
    sqlite4ValueSetStr(pVal, nB, zB, encin, SQLITE4_STATIC, 0);
    n = sqlite4_value_bytes(pVal);
    Tcl_ListObjAppendElement(i,pX,
        Tcl_NewStringObj((char*)sqlite4_value_text(pVal),n));
    sqlite4ValueFree(pVal);
  }
  sqlite4EndBenignMalloc(pEnv);

  pX = Tcl_NewStringObj("test_function", -1);
  Tcl_IncrRefCount(pX);
  Tcl_ListObjAppendElement(interp, pX, Tcl_NewStringObj("UTF-8", -1));
  Tcl_ListObjAppendElement(interp, pX, 
      Tcl_NewStringObj((char*)sqlite4_value_text(argv[0]), -1));
  Tcl_EvalObjEx(interp, pX, 0);
  Tcl_DecrRefCount(pX);
  sqlite4_result_text(pCtx, Tcl_GetStringResult(interp), -1, SQLITE4_TRANSIENT);
  sqlite4_result_text(pCtx, Tcl_GetStringResult(interp), -1,
                      SQLITE4_TRANSIENT, 0);
  pVal = sqlite4ValueNew(0);
  sqlite4ValueSetStr(pVal, -1, Tcl_GetStringResult(interp), 
      SQLITE4_UTF8, SQLITE4_STATIC);
      SQLITE4_UTF8, SQLITE4_STATIC, 0);
  sqlite4_result_text16be(pCtx, sqlite4_value_text16be(pVal),
      -1, SQLITE4_TRANSIENT);
      -1, SQLITE4_TRANSIENT, 0);
  sqlite4ValueFree(pVal);
}
static void test_function_utf16le(
  sqlite4_context *pCtx, 
  int nArg,
  sqlite4_value **argv
){
  Tcl_Interp *interp;
  Tcl_Obj *pX;
  sqlite4_value *pVal;
  interp = (Tcl_Interp *)sqlite4_user_data(pCtx);
  pX = Tcl_NewStringObj("test_function", -1);
  Tcl_IncrRefCount(pX);
  Tcl_ListObjAppendElement(interp, pX, Tcl_NewStringObj("UTF-16LE", -1));
  Tcl_ListObjAppendElement(interp, pX, 
      Tcl_NewStringObj((char*)sqlite4_value_text(argv[0]), -1));
  Tcl_EvalObjEx(interp, pX, 0);
  Tcl_DecrRefCount(pX);
  pVal = sqlite4ValueNew(0);
  sqlite4ValueSetStr(pVal, -1, Tcl_GetStringResult(interp), 
      SQLITE4_UTF8, SQLITE4_STATIC);
  sqlite4_result_text(pCtx,(char*)sqlite4_value_text(pVal),-1,SQLITE4_TRANSIENT);
      SQLITE4_UTF8, SQLITE4_STATIC, 0);
  sqlite4_result_text(pCtx, (char*)sqlite4_value_text(pVal), -1,
                      SQLITE4_TRANSIENT, 0);
  sqlite4ValueFree(pVal);
}
static void test_function_utf16be(
  sqlite4_context *pCtx, 
  int nArg,
  sqlite4_value **argv
){
  Tcl_Interp *interp;
  Tcl_Obj *pX;
  sqlite4_value *pVal;
  interp = (Tcl_Interp *)sqlite4_user_data(pCtx);
  pX = Tcl_NewStringObj("test_function", -1);
  Tcl_IncrRefCount(pX);
  Tcl_ListObjAppendElement(interp, pX, Tcl_NewStringObj("UTF-16BE", -1));
  Tcl_ListObjAppendElement(interp, pX, 
      Tcl_NewStringObj((char*)sqlite4_value_text(argv[0]), -1));
  Tcl_EvalObjEx(interp, pX, 0);
  Tcl_DecrRefCount(pX);
  pVal = sqlite4ValueNew(0);
  sqlite4ValueSetStr(pVal, -1, Tcl_GetStringResult(interp), 
      SQLITE4_UTF8, SQLITE4_STATIC);
      SQLITE4_UTF8, SQLITE4_STATIC, 0);
  sqlite4_result_text16(pCtx, sqlite4_value_text16le(pVal),
      -1, SQLITE4_TRANSIENT);
      -1, SQLITE4_TRANSIENT, 0);
  sqlite4_result_text16be(pCtx, sqlite4_value_text16le(pVal),
      -1, SQLITE4_TRANSIENT);
      -1, SQLITE4_TRANSIENT, 0);
  sqlite4_result_text16le(pCtx, sqlite4_value_text16le(pVal),
      -1, SQLITE4_TRANSIENT);
      -1, SQLITE4_TRANSIENT, 0);
  sqlite4ValueFree(pVal);
}
#endif /* SQLITE4_OMIT_UTF16 */
static int test_function(
  void * clientData,
  Tcl_Interp *interp,
  int objc,

  }

  if( getStmtPointer(interp, Tcl_GetString(objv[1]), &pStmt) ) return TCL_ERROR;
  if( Tcl_GetIntFromObj(interp, objv[2], &idx) ) return TCL_ERROR;
  value = (char*)Tcl_GetByteArrayFromObj(objv[3], &bytes);
  if( Tcl_GetIntFromObj(interp, objv[4], &bytes) ) return TCL_ERROR;

  rc = sqlite4_bind_text(pStmt, idx, value, bytes, SQLITE4_TRANSIENT);
  rc = sqlite4_bind_text(pStmt, idx, value, bytes, SQLITE4_TRANSIENT, 0);
  if( sqlite4TestErrCode(interp, StmtToDb(pStmt), rc) ) return TCL_ERROR;
  if( rc!=SQLITE4_OK ){
    Tcl_AppendResult(interp, sqlite4TestErrorName(rc), 0);
    return TCL_ERROR;
  }

  return TCL_OK;

  }

  if( getStmtPointer(interp, Tcl_GetString(oStmt), &pStmt) ) return TCL_ERROR;
  if( Tcl_GetIntFromObj(interp, oN, &idx) ) return TCL_ERROR;
  value = (char*)Tcl_GetByteArrayFromObj(oString, 0);
  if( Tcl_GetIntFromObj(interp, oBytes, &bytes) ) return TCL_ERROR;

  rc = sqlite4_bind_text16(pStmt, idx, (void *)value, bytes, xDel);
  rc = sqlite4_bind_text16(pStmt, idx, (void *)value, bytes, xDel, 0);
  if( sqlite4TestErrCode(interp, StmtToDb(pStmt), rc) ) return TCL_ERROR;
  if( rc!=SQLITE4_OK ){
    Tcl_AppendResult(interp, sqlite4TestErrorName(rc), 0);
    return TCL_ERROR;
  }

#endif /* SQLITE4_OMIT_UTF16 */

  }

  if( getStmtPointer(interp, Tcl_GetString(objv[1]), &pStmt) ) return TCL_ERROR;
  if( Tcl_GetIntFromObj(interp, objv[2], &idx) ) return TCL_ERROR;
  value = Tcl_GetString(objv[3]);
  if( Tcl_GetIntFromObj(interp, objv[4], &bytes) ) return TCL_ERROR;

  rc = sqlite4_bind_blob(pStmt, idx, value, bytes, xDestructor);
  rc = sqlite4_bind_blob(pStmt, idx, value, bytes, xDestructor, 0);
  if( sqlite4TestErrCode(interp, StmtToDb(pStmt), rc) ) return TCL_ERROR;
  if( rc!=SQLITE4_OK ){
    return TCL_ERROR;
  }

  return TCL_OK;
}

  }
  if( pEnc->enc==SQLITE4_UTF16 ){
    return SQLITE4_UTF16NATIVE;
  }
  return pEnc->enc;
}

static void freeStr(void *pStr){ sqlite4_free(0, pStr); }
static void freeStr(void *pEnv, void *pStr){
  sqlite4_free((sqlite4_env*)pEnv, pStr);
}

/*
** Usage:   test_translate <string/blob> <from enc> <to enc> ?<transient>?
**
*/
static int test_translate(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  u8 enc_from;
  u8 enc_to;
  sqlite4_value *pVal;

  char *z;
  int len;
  void (*xDel)(void *p) = SQLITE4_STATIC;
  void (*xDel)(void*,void*) = SQLITE4_STATIC;

  if( objc!=4 && objc!=5 ){
    Tcl_AppendResult(interp, "wrong # args: should be \"",
        Tcl_GetStringFromObj(objv[0], 0), 
        " <string/blob> <from enc> <to enc>", 0
    );
    return TCL_ERROR;

  pVal = sqlite4ValueNew(0);

  if( enc_from==SQLITE4_UTF8 ){
    z = Tcl_GetString(objv[1]);
    if( objc==5 ){
      z = sqlite4_mprintf(0, "%s", z);
    }
    sqlite4ValueSetStr(pVal, -1, z, enc_from, xDel);
    sqlite4ValueSetStr(pVal, -1, z, enc_from, xDel, 0);
  }else{
    z = (char*)Tcl_GetByteArrayFromObj(objv[1], &len);
    if( objc==5 ){
      char *zTmp = z;
      z = sqlite4_malloc(0, len);
      memcpy(z, zTmp, len);
    }
    sqlite4ValueSetStr(pVal, -1, z, enc_from, xDel);
    sqlite4ValueSetStr(pVal, -1, z, enc_from, xDel, 0);
  }

  z = (char *)sqlite4ValueText(pVal, enc_to);
  len = sqlite4ValueBytes(pVal, enc_to) + (enc_to==SQLITE4_UTF8?1:2);
  Tcl_SetObjResult(interp, Tcl_NewByteArrayObj((u8*)z, len));

  sqlite4ValueFree(pVal);