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 _VDBEINT_H_
  #define _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;
  
  /* Opaque type used by the explainer */
  typedef struct Explain Explain;
  
  /* 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
  */
  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 */
  #endif
    Bool isEphemeral:1;   /* True for an ephemeral table */
    Bool useRandomRowid:1;/* Generate new record numbers semi-randomly */
    Bool isOrdered:1;     /* True if the underlying table is BTREE_UNORDERED */
    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 */
    union {
      BtCursor *pCursor;          /* CURTYPE_BTREE.  Btree cursor */
      sqlite3_vtab_cursor *pVCur; /* CURTYPE_VTAB.   Vtab cursor */
      int pseudoTableReg;         /* CURTYPE_PSEUDO. Reg holding content. */
      VdbeSorter *pSorter;        /* CURTYPE_SORTER. Sorter object */
    } uc;
    Btree *pBt;           /* Separate file holding temporary table */
    KeyInfo *pKeyInfo;    /* Info about index keys needed by index cursors */
    int seekResult;       /* Result of previous sqlite3BtreeMoveto() */
    i64 seqCount;         /* Sequence counter */
    i64 movetoTarget;     /* Argument to the deferred sqlite3BtreeMoveto() */
  #ifdef SQLITE_ENABLE_COLUMN_USED_MASK
    u64 maskUsed;         /* Mask of columns used by this cursor */
  #endif
  
    /* Cached information about the header for the data record that the
    ** cursor is currently pointing to.  Only valid if cacheStatus matches
    ** Vdbe.cacheCtr.  Vdbe.cacheCtr will never take on the value of
    ** CACHE_STALE and so setting cacheStatus=CACHE_STALE guarantees that
    ** the cache is out of date.
    **
    ** aRow might point to (ephemeral) data for the current row, or it might
    ** be NULL.
    */
    u32 cacheStatus;      /* Cache is valid if this matches Vdbe.cacheCtr */
    u32 payloadSize;      /* Total number of bytes in the record */
    u32 szRow;            /* Byte available in aRow */
    u32 iHdrOffset;       /* Offset to next unparsed byte of the header */
    const u8 *aRow;       /* Data for the current row, if all on one page */
    u32 *aOffset;         /* Pointer to aType[nField] */
    u32 aType[1];         /* Type values for all entries in the record */
    /* 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[] */
  };
  typedef struct VdbeCursor VdbeCursor;
  
  /*
  ** 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 */
    u8 *aOnceFlag;          /* Array of OP_Once flags for parent frame */
    VdbeCursor **apCsr;     /* Array of Vdbe cursors for parent frame */
    void *token;            /* Copy of SubProgram.token */
    i64 lastRowid;          /* Last insert rowid (sqlite3.lastRowid) */
    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 nOnceFlag;          /* Number of entries in aOnceFlag */
    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))])
  
  /*
  ** A value for VdbeCursor.cacheValid that means the cache is always invalid.
  */
  #define CACHE_STALE 0
  
  /*
  ** 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 Mem {
    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;          /* Used when bit MEM_Zero is set in flags */
      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.
  ** No other flags may be set in this case.
  **
  ** 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 */
  #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  0x01ff   /* 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 rep is nul 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 */
  #ifdef SQLITE_OMIT_INCRBLOB
    #undef MEM_Zero
    #define MEM_Zero 0x0000
  #endif
  
  /*
  ** 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 iOp;                        /* Instruction number of OP_Function opcode */
    int iArg;                       /* Index of function argument. */
    void *pAux;                     /* Aux data pointer */
    void (*xDelete)(void *);        /* Destructor for the aux data */
    AuxData *pNext;                 /* 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 fErrorOrAux;         /* isError!=0 or pVdbe->pAuxData modified */
    u8 argc;                /* Number of arguments */
    sqlite3_value *argv[1]; /* Argument set */
  };
  
  /*
  ** An Explain object accumulates indented output which is helpful
  ** in describing recursive data structures.
  */
  struct Explain {
    Vdbe *pVdbe;       /* Attach the explanation to this Vdbe */
    StrAccum str;      /* The string being accumulated */
    int nIndent;       /* Number of elements in aIndent */
    u16 aIndent[100];  /* Levels of indentation */
    char zBase[100];   /* Initial space */
  };
  
  /* 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 */
    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 */
    Parse *pParse;          /* Parsing context used to create this Vdbe */
    int nMem;               /* Number of memory locations currently allocated */
    int nOp;                /* Number of instructions in the program */
    int nCursor;            /* Number of slots in apCsr[] */
    u32 magic;              /* Magic number for sanity checking */
    char *zErrMsg;          /* Error message written here */
    Vdbe *pPrev,*pNext;     /* Linked list of VDBEs with the same Vdbe.db */
    VdbeCursor **apCsr;     /* One element of this array for each open cursor */
    Mem *aVar;              /* Values for the OP_Variable opcode. */
    char **azVar;           /* Name of variables */
    ynVar nVar;             /* Number of entries in aVar[] */
    ynVar nzVar;            /* Number of entries in azVar[] */
    u32 cacheCtr;           /* VdbeCursor row cache generation counter */
    int pc;                 /* The program counter */
    int rc;                 /* Value to return */
  #ifdef SQLITE_DEBUG
    int rcApp;              /* errcode set by sqlite3_result_error_code() */
  #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 */
    bft explain:2;          /* True if EXPLAIN present on SQL command */
    bft changeCntOn:1;      /* True to update the change-counter */
    bft expired:1;          /* True if the VM needs to be recompiled */
    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 */
    bft isPrepareV2:1;      /* True if prepared with prepare_v2() */
    bft doingRerun:1;       /* True if rerunning after an auto-reprepare */
    int nChange;            /* Number of db changes made since last reset */
    yDbMask btreeMask;      /* Bitmask of db->aDb[] entries referenced */
    yDbMask lockMask;       /* Subset of btreeMask that requires a lock */
    int iStatement;         /* Statement number (or 0 if has not opened stmt) */
    u32 aCounter[5];        /* Counters used by sqlite3_stmt_status() */
  #ifndef SQLITE_OMIT_TRACE
    i64 startTime;          /* Time when query started - used for profiling */
  #endif
    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 */
    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 */
    int nOnceFlag;          /* Size of array aOnceFlag[] */
    u8 *aOnceFlag;          /* Flags for OP_Once */
    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     0x26bceaa5    /* Building a VDBE program */
  #define VDBE_MAGIC_RUN      0xbdf20da3    /* VDBE is ready to execute */
  #define VDBE_MAGIC_HALT     0x519c2973    /* VDBE has completed execution */
  #define VDBE_MAGIC_DEAD     0xb606c3c8    /* The VDBE has been deallocated */
  
  /*
  ** Function prototypes
  */
  void sqlite3VdbeError(Vdbe*, const char *, ...);
  void sqlite3VdbeFreeCursor(Vdbe *, VdbeCursor*);
  void sqliteVdbePopStack(Vdbe*,int);
  int sqlite3VdbeCursorMoveto(VdbeCursor*);
  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(Vdbe*, 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 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*);
  void sqlite3VdbeIntegerAffinity(Mem*);
  int sqlite3VdbeMemRealify(Mem*);
  int sqlite3VdbeMemNumerify(Mem*);
  void sqlite3VdbeMemCast(Mem*,u8,u8);
  int sqlite3VdbeMemFromBtree(BtCursor*,u32,u32,int,Mem*);
  void sqlite3VdbeMemRelease(Mem *p);
  #define VdbeMemDynamic(X)  \
    (((X)->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame))!=0)
  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 *);
  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 *);
  int sqlite3VdbeSorterRewind(const VdbeCursor *, int *);
  int sqlite3VdbeSorterWrite(const VdbeCursor *, Mem *);
  int sqlite3VdbeSorterCompare(const VdbeCursor *, Mem *, int, int *);
  
  #if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE>0
    void sqlite3VdbeEnter(Vdbe*);
    void sqlite3VdbeLeave(Vdbe*);
  #else
  # define sqlite3VdbeEnter(X)
  # 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
  
  int sqlite3VdbeMemTranslate(Mem*, u8);
  #ifdef SQLITE_DEBUG
    void sqlite3VdbePrintSql(Vdbe*);
    void sqlite3VdbeMemPrettyPrint(Mem *pMem, char *zBuf);
  #endif
  int sqlite3VdbeMemHandleBom(Mem *pMem);
  
  #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(_VDBEINT_H_) */
  