text: /*
  ** 2003 September 6
  **
  ** The author disclaims copyright to this source code.  In place of
  ** a legal notice, here is a blessing:
  **
  **    May you do good and not evil.
  **    May you find forgiveness for yourself and forgive others.
  **    May you share freely, never taking more than you give.
  **
  *************************************************************************
  ** This is the header file for information that is private to the
  ** VDBE.  This information used to all be at the top of the single
  ** source code file "vdbe.c".  When that file became too big (over
  ** 6000 lines long) it was split up into several smaller files and
  ** this header information was factored out.
  */
  #ifndef SQLITE_VDBEINT_H
  #define SQLITE_VDBEINT_H
  
  /*
  ** The maximum number of times that a statement will try to reparse
  ** itself before giving up and returning SQLITE_SCHEMA.
  */
  #ifndef SQLITE_MAX_SCHEMA_RETRY
  # define SQLITE_MAX_SCHEMA_RETRY 50
  #endif
  
  /*
  ** VDBE_DISPLAY_P4 is true or false depending on whether or not the
  ** "explain" P4 display logic is enabled.
  */
  #if !defined(SQLITE_OMIT_EXPLAIN) || !defined(NDEBUG) \
       || defined(VDBE_PROFILE) || defined(SQLITE_DEBUG)
  # define VDBE_DISPLAY_P4 1
  #else
  # define VDBE_DISPLAY_P4 0
  #endif
  
  /*
  ** SQL is translated into a sequence of instructions to be
  ** executed by a virtual machine.  Each instruction is an instance
  ** of the following structure.
  */
  typedef struct VdbeOp Op;
  
  /*
  ** Boolean values
  */
  typedef unsigned Bool;
  
  /* Opaque type used by code in vdbesort.c */
  typedef struct VdbeSorter VdbeSorter;
  
  /* Elements of the linked list at Vdbe.pAuxData */
  typedef struct AuxData AuxData;
  
  /* Types of VDBE cursors */
  #define CURTYPE_BTREE       0
  #define CURTYPE_SORTER      1
  #define CURTYPE_VTAB        2
  #define CURTYPE_PSEUDO      3
  
  /*
  ** A VdbeCursor is an superclass (a wrapper) for various cursor objects:
  **
  **      * A b-tree cursor
  **          -  In the main database or in an ephemeral database
  **          -  On either an index or a table
  **      * A sorter
  **      * A virtual table
  **      * A one-row "pseudotable" stored in a single register
  */
  typedef struct VdbeCursor VdbeCursor;
  struct VdbeCursor {
    u8 eCurType;            /* One of the CURTYPE_* values above */
    i8 iDb;                 /* Index of cursor database in db->aDb[] (or -1) */
    u8 nullRow;             /* True if pointing to a row with no data */
    u8 deferredMoveto;      /* A call to sqlite3BtreeMoveto() is needed */
    u8 isTable;             /* True for rowid tables.  False for indexes */
  #ifdef SQLITE_DEBUG
    u8 seekOp;              /* Most recent seek operation on this cursor */
    u8 wrFlag;              /* The wrFlag argument to sqlite3BtreeCursor() */
  #endif
    Bool isEphemeral:1;     /* True for an ephemeral table */
    Bool useRandomRowid:1;  /* Generate new record numbers semi-randomly */
    Bool isOrdered:1;       /* True if the table is not BTREE_UNORDERED */
    Btree *pBtx;            /* Separate file holding temporary table */
    i64 seqCount;           /* Sequence counter */
    int *aAltMap;           /* Mapping from table to index column numbers */
  
    /* Cached OP_Column parse information is only valid if cacheStatus matches
    ** Vdbe.cacheCtr.  Vdbe.cacheCtr will never take on the value of
    ** CACHE_STALE (0) and so setting cacheStatus=CACHE_STALE guarantees that
    ** the cache is out of date. */
    u32 cacheStatus;        /* Cache is valid if this matches Vdbe.cacheCtr */
    int seekResult;         /* Result of previous sqlite3BtreeMoveto() or 0
                            ** if there have been no prior seeks on the cursor. */
    /* seekResult does not distinguish between "no seeks have ever occurred
    ** on this cursor" and "the most recent seek was an exact match".
    ** For CURTYPE_PSEUDO, seekResult is the register holding the record */
  
    /* When a new VdbeCursor is allocated, only the fields above are zeroed.
    ** The fields that follow are uninitialized, and must be individually
    ** initialized prior to first use. */
    VdbeCursor *pAltCursor; /* Associated index cursor from which to read */
    union {
      BtCursor *pCursor;          /* CURTYPE_BTREE or _PSEUDO.  Btree cursor */
      sqlite3_vtab_cursor *pVCur; /* CURTYPE_VTAB.              Vtab cursor */
      VdbeSorter *pSorter;        /* CURTYPE_SORTER.            Sorter object */
    } uc;
    KeyInfo *pKeyInfo;      /* Info about index keys needed by index cursors */
    u32 iHdrOffset;         /* Offset to next unparsed byte of the header */
    Pgno pgnoRoot;          /* Root page of the open btree cursor */
    i16 nField;             /* Number of fields in the header */
    u16 nHdrParsed;         /* Number of header fields parsed so far */
    i64 movetoTarget;       /* Argument to the deferred sqlite3BtreeMoveto() */
    u32 *aOffset;           /* Pointer to aType[nField] */
    const u8 *aRow;         /* Data for the current row, if all on one page */
    u32 payloadSize;        /* Total number of bytes in the record */
    u32 szRow;              /* Byte available in aRow */
  #ifdef SQLITE_ENABLE_COLUMN_USED_MASK
    u64 maskUsed;           /* Mask of columns used by this cursor */
  #endif
  
    /* 2*nField extra array elements allocated for aType[], beyond the one
    ** static element declared in the structure.  nField total array slots for
    ** aType[] and nField+1 array slots for aOffset[] */
    u32 aType[1];           /* Type values record decode.  MUST BE LAST */
  };
  
  
  /*
  ** A value for VdbeCursor.cacheStatus that means the cache is always invalid.
  */
  #define CACHE_STALE 0
  
  /*
  ** When a sub-program is executed (OP_Program), a structure of this type
  ** is allocated to store the current value of the program counter, as
  ** well as the current memory cell array and various other frame specific
  ** values stored in the Vdbe struct. When the sub-program is finished, 
  ** these values are copied back to the Vdbe from the VdbeFrame structure,
  ** restoring the state of the VM to as it was before the sub-program
  ** began executing.
  **
  ** The memory for a VdbeFrame object is allocated and managed by a memory
  ** cell in the parent (calling) frame. When the memory cell is deleted or
  ** overwritten, the VdbeFrame object is not freed immediately. Instead, it
  ** is linked into the Vdbe.pDelFrame list. The contents of the Vdbe.pDelFrame
  ** list is deleted when the VM is reset in VdbeHalt(). The reason for doing
  ** this instead of deleting the VdbeFrame immediately is to avoid recursive
  ** calls to sqlite3VdbeMemRelease() when the memory cells belonging to the
  ** child frame are released.
  **
  ** The currently executing frame is stored in Vdbe.pFrame. Vdbe.pFrame is
  ** set to NULL if the currently executing frame is the main program.
  */
  typedef struct VdbeFrame VdbeFrame;
  struct VdbeFrame {
    Vdbe *v;                /* VM this frame belongs to */
    VdbeFrame *pParent;     /* Parent of this frame, or NULL if parent is main */
    Op *aOp;                /* Program instructions for parent frame */
    i64 *anExec;            /* Event counters from parent frame */
    Mem *aMem;              /* Array of memory cells for parent frame */
    VdbeCursor **apCsr;     /* Array of Vdbe cursors for parent frame */
    u8 *aOnce;              /* Bitmask used by OP_Once */
    void *token;            /* Copy of SubProgram.token */
    i64 lastRowid;          /* Last insert rowid (sqlite3.lastRowid) */
    AuxData *pAuxData;      /* Linked list of auxdata allocations */
    int nCursor;            /* Number of entries in apCsr */
    int pc;                 /* Program Counter in parent (calling) frame */
    int nOp;                /* Size of aOp array */
    int nMem;               /* Number of entries in aMem */
    int nChildMem;          /* Number of memory cells for child frame */
    int nChildCsr;          /* Number of cursors for child frame */
    int nChange;            /* Statement changes (Vdbe.nChange)     */
    int nDbChange;          /* Value of db->nChange */
  };
  
  #define VdbeFrameMem(p) ((Mem *)&((u8 *)p)[ROUND8(sizeof(VdbeFrame))])
  
  /*
  ** Internally, the vdbe manipulates nearly all SQL values as Mem
  ** structures. Each Mem struct may cache multiple representations (string,
  ** integer etc.) of the same value.
  */
  struct sqlite3_value {
    union MemValue {
      double r;           /* Real value used when MEM_Real is set in flags */
      i64 i;              /* Integer value used when MEM_Int is set in flags */
      int nZero;          /* Extra zero bytes when MEM_Zero and MEM_Blob set */
      const char *zPType; /* Pointer type when MEM_Term|MEM_Subtype|MEM_Null */
      FuncDef *pDef;      /* Used only when flags==MEM_Agg */
      RowSet *pRowSet;    /* Used only when flags==MEM_RowSet */
      VdbeFrame *pFrame;  /* Used when flags==MEM_Frame */
    } u;
    u16 flags;          /* Some combination of MEM_Null, MEM_Str, MEM_Dyn, etc. */
    u8  enc;            /* SQLITE_UTF8, SQLITE_UTF16BE, SQLITE_UTF16LE */
    u8  eSubtype;       /* Subtype for this value */
    int n;              /* Number of characters in string value, excluding '\0' */
    char *z;            /* String or BLOB value */
    /* ShallowCopy only needs to copy the information above */
    char *zMalloc;      /* Space to hold MEM_Str or MEM_Blob if szMalloc>0 */
    int szMalloc;       /* Size of the zMalloc allocation */
    u32 uTemp;          /* Transient storage for serial_type in OP_MakeRecord */
    sqlite3 *db;        /* The associated database connection */
    void (*xDel)(void*);/* Destructor for Mem.z - only valid if MEM_Dyn */
  #ifdef SQLITE_DEBUG
    Mem *pScopyFrom;    /* This Mem is a shallow copy of pScopyFrom */
    void *pFiller;      /* So that sizeof(Mem) is a multiple of 8 */
  #endif
  };
  
  /*
  ** Size of struct Mem not including the Mem.zMalloc member or anything that
  ** follows.
  */
  #define MEMCELLSIZE offsetof(Mem,zMalloc)
  
  /* 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.
  ** For a pointer type created using sqlite3_bind_pointer() or
  ** sqlite3_result_pointer() the MEM_Term and MEM_Subtype flags are also set.
  **
  ** If the MEM_Str flag is set then Mem.z points at a string representation.
  ** Usually this is encoded in the same unicode encoding as the main
  ** database (see below for exceptions). If the MEM_Term flag is also
  ** set, then the string is nul terminated. The MEM_Int and MEM_Real 
  ** flags may coexist with the MEM_Str flag.
  */
  #define MEM_Null      0x0001   /* Value is NULL (or a pointer) */
  #define MEM_Str       0x0002   /* Value is a string */
  #define MEM_Int       0x0004   /* Value is an integer */
  #define MEM_Real      0x0008   /* Value is a real number */
  #define MEM_Blob      0x0010   /* Value is a BLOB */
  #define MEM_AffMask   0x001f   /* Mask of affinity bits */
  #define MEM_RowSet    0x0020   /* Value is a RowSet object */
  #define MEM_Frame     0x0040   /* Value is a VdbeFrame object */
  #define MEM_Undefined 0x0080   /* Value is undefined */
  #define MEM_Cleared   0x0100   /* NULL set by OP_Null, not from data */
  #define MEM_TypeMask  0xc1ff   /* Mask of type bits */
  
  
  /* Whenever Mem contains a valid string or blob representation, one of
  ** the following flags must be set to determine the memory management
  ** policy for Mem.z.  The MEM_Term flag tells us whether or not the
  ** string is \000 or \u0000 terminated
  */
  #define MEM_Term      0x0200   /* String in Mem.z is zero terminated */
  #define MEM_Dyn       0x0400   /* Need to call Mem.xDel() on Mem.z */
  #define MEM_Static    0x0800   /* Mem.z points to a static string */
  #define MEM_Ephem     0x1000   /* Mem.z points to an ephemeral string */
  #define MEM_Agg       0x2000   /* Mem.z points to an agg function context */
  #define MEM_Zero      0x4000   /* Mem.i contains count of 0s appended to blob */
  #define MEM_Subtype   0x8000   /* Mem.eSubtype is valid */
  #ifdef SQLITE_OMIT_INCRBLOB
    #undef MEM_Zero
    #define MEM_Zero 0x0000
  #endif
  
  /* Return TRUE if Mem X contains dynamically allocated content - anything
  ** that needs to be deallocated to avoid a leak.
  */
  #define VdbeMemDynamic(X)  \
    (((X)->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame))!=0)
  
  /*
  ** Clear any existing type flags from a Mem and replace them with f
  */
  #define MemSetTypeFlag(p, f) \
     ((p)->flags = ((p)->flags&~(MEM_TypeMask|MEM_Zero))|f)
  
  /*
  ** Return true if a memory cell is not marked as invalid.  This macro
  ** is for use inside assert() statements only.
  */
  #ifdef SQLITE_DEBUG
  #define memIsValid(M)  ((M)->flags & MEM_Undefined)==0
  #endif
  
  /*
  ** Each auxiliary data pointer stored by a user defined function 
  ** implementation calling sqlite3_set_auxdata() is stored in an instance
  ** of this structure. All such structures associated with a single VM
  ** are stored in a linked list headed at Vdbe.pAuxData. All are destroyed
  ** when the VM is halted (if not before).
  */
  struct AuxData {
    int iAuxOp;                     /* Instruction number of OP_Function opcode */
    int iAuxArg;                    /* Index of function argument. */
    void *pAux;                     /* Aux data pointer */
    void (*xDeleteAux)(void*);      /* Destructor for the aux data */
    AuxData *pNextAux;              /* Next element in list */
  };
  
  /*
  ** The "context" argument for an installable function.  A pointer to an
  ** instance of this structure is the first argument to the routines used
  ** implement the SQL functions.
  **
  ** There is a typedef for this structure in sqlite.h.  So all routines,
  ** even the public interface to SQLite, can use a pointer to this structure.
  ** But this file is the only place where the internal details of this
  ** structure are known.
  **
  ** This structure is defined inside of vdbeInt.h because it uses substructures
  ** (Mem) which are only defined there.
  */
  struct sqlite3_context {
    Mem *pOut;              /* The return value is stored here */
    FuncDef *pFunc;         /* Pointer to function information */
    Mem *pMem;              /* Memory cell used to store aggregate context */
    Vdbe *pVdbe;            /* The VM that owns this context */
    int iOp;                /* Instruction number of OP_Function */
    int isError;            /* Error code returned by the function. */
    u8 skipFlag;            /* Skip accumulator loading if true */
    u8 argc;                /* Number of arguments */
    sqlite3_value *argv[1]; /* Argument set */
  };
  
  /* A bitfield type for use inside of structures.  Always follow with :N where
  ** N is the number of bits.
  */
  typedef unsigned bft;  /* Bit Field Type */
  
  typedef struct ScanStatus ScanStatus;
  struct ScanStatus {
    int addrExplain;                /* OP_Explain for loop */
    int addrLoop;                   /* Address of "loops" counter */
    int addrVisit;                  /* Address of "rows visited" counter */
    int iSelectID;                  /* The "Select-ID" for this loop */
    LogEst nEst;                    /* Estimated output rows per loop */
    char *zName;                    /* Name of table or index */
  };
  
  /*
  ** An instance of the virtual machine.  This structure contains the complete
  ** state of the virtual machine.
  **
  ** The "sqlite3_stmt" structure pointer that is returned by sqlite3_prepare()
  ** is really a pointer to an instance of this structure.
  */
  struct Vdbe {
    sqlite3 *db;            /* The database connection that owns this statement */
    Vdbe *pPrev,*pNext;     /* Linked list of VDBEs with the same Vdbe.db */
    Parse *pParse;          /* Parsing context used to create this Vdbe */
    ynVar nVar;             /* Number of entries in aVar[] */
    u32 magic;              /* Magic number for sanity checking */
    int nMem;               /* Number of memory locations currently allocated */
    int nCursor;            /* Number of slots in apCsr[] */
    u32 cacheCtr;           /* VdbeCursor row cache generation counter */
    int pc;                 /* The program counter */
    int rc;                 /* Value to return */
    int nChange;            /* Number of db changes made since last reset */
    int iStatement;         /* Statement number (or 0 if has not opened stmt) */
    i64 iCurrentTime;       /* Value of julianday('now') for this statement */
    i64 nFkConstraint;      /* Number of imm. FK constraints this VM */
    i64 nStmtDefCons;       /* Number of def. constraints when stmt started */
    i64 nStmtDefImmCons;    /* Number of def. imm constraints when stmt started */
  
    /* When allocating a new Vdbe object, all of the fields below should be
    ** initialized to zero or NULL */
  
    Op *aOp;                /* Space to hold the virtual machine's program */
    Mem *aMem;              /* The memory locations */
    Mem **apArg;            /* Arguments to currently executing user function */
    Mem *aColName;          /* Column names to return */
    Mem *pResultSet;        /* Pointer to an array of results */
    char *zErrMsg;          /* Error message written here */
    VdbeCursor **apCsr;     /* One element of this array for each open cursor */
    Mem *aVar;              /* Values for the OP_Variable opcode. */
    VList *pVList;          /* Name of variables */
  #ifndef SQLITE_OMIT_TRACE
    i64 startTime;          /* Time when query started - used for profiling */
  #endif
    int nOp;                /* Number of instructions in the program */
  #ifdef SQLITE_DEBUG
    int rcApp;              /* errcode set by sqlite3_result_error_code() */
    u32 nWrite;             /* Number of write operations that have occurred */
  #endif
    u16 nResColumn;         /* Number of columns in one row of the result set */
    u8 errorAction;         /* Recovery action to do in case of an error */
    u8 minWriteFileFormat;  /* Minimum file format for writable database files */
    u8 prepFlags;           /* SQLITE_PREPARE_* flags */
    bft expired:1;          /* True if the VM needs to be recompiled */
    bft doingRerun:1;       /* True if rerunning after an auto-reprepare */
    bft explain:2;          /* True if EXPLAIN present on SQL command */
    bft changeCntOn:1;      /* True to update the change-counter */
    bft runOnlyOnce:1;      /* Automatically expire on reset */
    bft usesStmtJournal:1;  /* True if uses a statement journal */
    bft readOnly:1;         /* True for statements that do not write */
    bft bIsReader:1;        /* True for statements that read */
    yDbMask btreeMask;      /* Bitmask of db->aDb[] entries referenced */
    yDbMask lockMask;       /* Subset of btreeMask that requires a lock */
    u32 aCounter[7];        /* Counters used by sqlite3_stmt_status() */
    char *zSql;             /* Text of the SQL statement that generated this */
    void *pFree;            /* Free this when deleting the vdbe */
    VdbeFrame *pFrame;      /* Parent frame */
    VdbeFrame *pDelFrame;   /* List of frame objects to free on VM reset */
    int nFrame;             /* Number of frames in pFrame list */
    u32 expmask;            /* Binding to these vars invalidates VM */
    SubProgram *pProgram;   /* Linked list of all sub-programs used by VM */
    AuxData *pAuxData;      /* Linked list of auxdata allocations */
  #ifdef SQLITE_ENABLE_STMT_SCANSTATUS
    i64 *anExec;            /* Number of times each op has been executed */
    int nScan;              /* Entries in aScan[] */
    ScanStatus *aScan;      /* Scan definitions for sqlite3_stmt_scanstatus() */
  #endif
  };
  
  /*
  ** The following are allowed values for Vdbe.magic
  */
  #define VDBE_MAGIC_INIT     0x16bceaa5    /* Building a VDBE program */
  #define VDBE_MAGIC_RUN      0x2df20da3    /* VDBE is ready to execute */
  #define VDBE_MAGIC_HALT     0x319c2973    /* VDBE has completed execution */
  #define VDBE_MAGIC_RESET    0x48fa9f76    /* Reset and ready to run again */
  #define VDBE_MAGIC_DEAD     0x5606c3c8    /* The VDBE has been deallocated */
  
  /*
  ** Structure used to store the context required by the 
  ** sqlite3_preupdate_*() API functions.
  */
  struct PreUpdate {
    Vdbe *v;
    VdbeCursor *pCsr;               /* Cursor to read old values from */
    int op;                         /* One of SQLITE_INSERT, UPDATE, DELETE */
    u8 *aRecord;                    /* old.* database record */
    KeyInfo keyinfo;
    UnpackedRecord *pUnpacked;      /* Unpacked version of aRecord[] */
    UnpackedRecord *pNewUnpacked;   /* Unpacked version of new.* record */
    int iNewReg;                    /* Register for new.* values */
    i64 iKey1;                      /* First key value passed to hook */
    i64 iKey2;                      /* Second key value passed to hook */
    Mem *aNew;                      /* Array of new.* values */
    Table *pTab;                    /* Schema object being upated */          
    Index *pPk;                     /* PK index if pTab is WITHOUT ROWID */
  };
  
  /*
  ** Function prototypes
  */
  void sqlite3VdbeError(Vdbe*, const char *, ...);
  void sqlite3VdbeFreeCursor(Vdbe *, VdbeCursor*);
  void sqliteVdbePopStack(Vdbe*,int);
  int sqlite3VdbeCursorMoveto(VdbeCursor**, int*);
  int sqlite3VdbeCursorRestore(VdbeCursor*);
  #if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE)
  void sqlite3VdbePrintOp(FILE*, int, Op*);
  #endif
  u32 sqlite3VdbeSerialTypeLen(u32);
  u8 sqlite3VdbeOneByteSerialTypeLen(u8);
  u32 sqlite3VdbeSerialType(Mem*, int, u32*);
  u32 sqlite3VdbeSerialPut(unsigned char*, Mem*, u32);
  u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*);
  void sqlite3VdbeDeleteAuxData(sqlite3*, AuxData**, int, int);
  
  int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *);
  int sqlite3VdbeIdxKeyCompare(sqlite3*,VdbeCursor*,UnpackedRecord*,int*);
  int sqlite3VdbeIdxRowid(sqlite3*, BtCursor*, i64*);
  int sqlite3VdbeExec(Vdbe*);
  int sqlite3VdbeList(Vdbe*);
  int sqlite3VdbeHalt(Vdbe*);
  int sqlite3VdbeChangeEncoding(Mem *, int);
  int sqlite3VdbeMemTooBig(Mem*);
  int sqlite3VdbeMemCopy(Mem*, const Mem*);
  void sqlite3VdbeMemShallowCopy(Mem*, const Mem*, int);
  void sqlite3VdbeMemMove(Mem*, Mem*);
  int sqlite3VdbeMemNulTerminate(Mem*);
  int sqlite3VdbeMemSetStr(Mem*, const char*, int, u8, void(*)(void*));
  void sqlite3VdbeMemSetInt64(Mem*, i64);
  #ifdef SQLITE_OMIT_FLOATING_POINT
  # define sqlite3VdbeMemSetDouble sqlite3VdbeMemSetInt64
  #else
    void sqlite3VdbeMemSetDouble(Mem*, double);
  #endif
  void sqlite3VdbeMemSetPointer(Mem*, void*, const char*, void(*)(void*));
  void sqlite3VdbeMemInit(Mem*,sqlite3*,u16);
  void sqlite3VdbeMemSetNull(Mem*);
  void sqlite3VdbeMemSetZeroBlob(Mem*,int);
  void sqlite3VdbeMemSetRowSet(Mem*);
  int sqlite3VdbeMemMakeWriteable(Mem*);
  int sqlite3VdbeMemStringify(Mem*, u8, u8);
  i64 sqlite3VdbeIntValue(Mem*);
  int sqlite3VdbeMemIntegerify(Mem*);
  double sqlite3VdbeRealValue(Mem*);
  int sqlite3VdbeBooleanValue(Mem*, int ifNull);
  void sqlite3VdbeIntegerAffinity(Mem*);
  int sqlite3VdbeMemRealify(Mem*);
  int sqlite3VdbeMemNumerify(Mem*);
  void sqlite3VdbeMemCast(Mem*,u8,u8);
  int sqlite3VdbeMemFromBtree(BtCursor*,u32,u32,Mem*);
  void sqlite3VdbeMemRelease(Mem *p);
  int sqlite3VdbeMemFinalize(Mem*, FuncDef*);
  const char *sqlite3OpcodeName(int);
  int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve);
  int sqlite3VdbeMemClearAndResize(Mem *pMem, int n);
  int sqlite3VdbeCloseStatement(Vdbe *, int);
  void sqlite3VdbeFrameDelete(VdbeFrame*);
  int sqlite3VdbeFrameRestore(VdbeFrame *);
  #ifdef SQLITE_ENABLE_PREUPDATE_HOOK
  void sqlite3VdbePreUpdateHook(Vdbe*,VdbeCursor*,int,const char*,Table*,i64,int);
  #endif
  int sqlite3VdbeTransferError(Vdbe *p);
  
  int sqlite3VdbeSorterInit(sqlite3 *, int, VdbeCursor *);
  void sqlite3VdbeSorterReset(sqlite3 *, VdbeSorter *);
  void sqlite3VdbeSorterClose(sqlite3 *, VdbeCursor *);
  int sqlite3VdbeSorterRowkey(const VdbeCursor *, Mem *);
  int sqlite3VdbeSorterNext(sqlite3 *, const VdbeCursor *);
  int sqlite3VdbeSorterRewind(const VdbeCursor *, int *);
  int sqlite3VdbeSorterWrite(const VdbeCursor *, Mem *);
  int sqlite3VdbeSorterCompare(const VdbeCursor *, Mem *, int, int *);
  
  #ifdef SQLITE_DEBUG
    void sqlite3VdbeIncrWriteCounter(Vdbe*, VdbeCursor*);
    void sqlite3VdbeAssertAbortable(Vdbe*);
  #else
  # define sqlite3VdbeIncrWriteCounter(V,C)
  # define sqlite3VdbeAssertAbortable(V)
  #endif
  
  #if !defined(SQLITE_OMIT_SHARED_CACHE) 
    void sqlite3VdbeEnter(Vdbe*);
  #else
  # define sqlite3VdbeEnter(X)
  #endif
  
  #if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE>0
    void sqlite3VdbeLeave(Vdbe*);
  #else
  # define sqlite3VdbeLeave(X)
  #endif
  
  #ifdef SQLITE_DEBUG
  void sqlite3VdbeMemAboutToChange(Vdbe*,Mem*);
  int sqlite3VdbeCheckMemInvariants(Mem*);
  #endif
  
  #ifndef SQLITE_OMIT_FOREIGN_KEY
  int sqlite3VdbeCheckFk(Vdbe *, int);
  #else
  # define sqlite3VdbeCheckFk(p,i) 0
  #endif
  
  #ifdef SQLITE_DEBUG
    void sqlite3VdbePrintSql(Vdbe*);
    void sqlite3VdbeMemPrettyPrint(Mem *pMem, char *zBuf);
  #endif
  #ifndef SQLITE_OMIT_UTF16
    int sqlite3VdbeMemTranslate(Mem*, u8);
    int sqlite3VdbeMemHandleBom(Mem *pMem);
  #endif
  
  #ifndef SQLITE_OMIT_INCRBLOB
    int sqlite3VdbeMemExpandBlob(Mem *);
    #define ExpandBlob(P) (((P)->flags&MEM_Zero)?sqlite3VdbeMemExpandBlob(P):0)
  #else
    #define sqlite3VdbeMemExpandBlob(x) SQLITE_OK
    #define ExpandBlob(P) SQLITE_OK
  #endif
  
  #endif /* !defined(SQLITE_VDBEINT_H) */
  