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-/*
-** 2001 September 15
-**
-** 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.
-**
-*************************************************************************
-** Header file for the Virtual DataBase Engine (VDBE)
-**
-** This header defines the interface to the virtual database engine
-** or VDBE. The VDBE implements an abstract machine that runs a
-** simple program to access and modify the underlying database.
-**
-** $Id$
-*/
-#ifndef _SQLITE_VDBE_H_
-#define _SQLITE_VDBE_H_
-#include <stdio.h>
-
-/*
-** A single VDBE is an opaque structure named "Vdbe". Only routines
-** in the source file sqliteVdbe.c are allowed to see the insides
-** of this structure.
-*/
-typedef struct Vdbe Vdbe;
-
-/*
-** A single instruction of the virtual machine has an opcode
-** and as many as three operands. The instruction is recorded
-** as an instance of the following structure:
-*/
-struct VdbeOp {
- u8 opcode; /* What operation to perform */
- int p1; /* First operand */
- int p2; /* Second parameter (often the jump destination) */
- char *p3; /* Third parameter */
- int p3type; /* P3_STATIC, P3_DYNAMIC or P3_POINTER */
-#ifdef VDBE_PROFILE
- int cnt; /* Number of times this instruction was executed */
- long long cycles; /* Total time spend executing this instruction */
-#endif
-};
-typedef struct VdbeOp VdbeOp;
-
-/*
-** A smaller version of VdbeOp used for the VdbeAddOpList() function because
-** it takes up less space.
-*/
-struct VdbeOpList {
- u8 opcode; /* What operation to perform */
- signed char p1; /* First operand */
- short int p2; /* Second parameter (often the jump destination) */
- char *p3; /* Third parameter */
-};
-typedef struct VdbeOpList VdbeOpList;
-
-/*
-** Allowed values of VdbeOp.p3type
-*/
-#define P3_NOTUSED 0 /* The P3 parameter is not used */
-#define P3_DYNAMIC (-1) /* Pointer to a string obtained from sqliteMalloc() */
-#define P3_STATIC (-2) /* Pointer to a static string */
-#define P3_POINTER (-3) /* P3 is a pointer to some structure or object */
-#define P3_COLLSEQ (-4) /* P3 is a pointer to a CollSeq structure */
-#define P3_FUNCDEF (-5) /* P3 is a pointer to a FuncDef structure */
-#define P3_KEYINFO (-6) /* P3 is a pointer to a KeyInfo structure */
-#define P3_VDBEFUNC (-7) /* P3 is a pointer to a VdbeFunc structure */
-
-/* When adding a P3 argument using P3_KEYINFO, a copy of the KeyInfo structure
-** is made. That copy is freed when the Vdbe is finalized. But if the
-** argument is P3_KEYINFO_HANDOFF, the passed in pointer is used. It still
-** gets freed when the Vdbe is finalized so it still should be obtained
-** from a single sqliteMalloc(). But no copy is made and the calling
-** function should *not* try to free the KeyInfo.
-*/
-#define P3_KEYINFO_HANDOFF (-7)
-
-/*
-** The following macro converts a relative address in the p2 field
-** of a VdbeOp structure into a negative number so that
-** sqlite3VdbeAddOpList() knows that the address is relative. Calling
-** the macro again restores the address.
-*/
-#define ADDR(X) (-1-(X))
-
-/*
-** The makefile scans the vdbe.c source file and creates the "opcodes.h"
-** header file that defines a number for each opcode used by the VDBE.
-*/
-#include "opcodes.h"
-
-/*
-** Prototypes for the VDBE interface. See comments on the implementation
-** for a description of what each of these routines does.
-*/
-Vdbe *sqlite3VdbeCreate(sqlite3*);
-void sqlite3VdbeCreateCallback(Vdbe*, int*);
-int sqlite3VdbeAddOp(Vdbe*,int,int,int);
-int sqlite3VdbeOp3(Vdbe*,int,int,int,const char *zP3,int);
-int sqlite3VdbeAddOpList(Vdbe*, int nOp, VdbeOpList const *aOp);
-void sqlite3VdbeChangeP1(Vdbe*, int addr, int P1);
-void sqlite3VdbeChangeP2(Vdbe*, int addr, int P2);
-void sqlite3VdbeChangeP3(Vdbe*, int addr, const char *zP1, int N);
-void sqlite3VdbeDequoteP3(Vdbe*, int addr);
-int sqlite3VdbeFindOp(Vdbe*, int, int, int);
-VdbeOp *sqlite3VdbeGetOp(Vdbe*, int);
-int sqlite3VdbeMakeLabel(Vdbe*);
-void sqlite3VdbeDelete(Vdbe*);
-void sqlite3VdbeMakeReady(Vdbe*,int,int,int,int);
-int sqlite3VdbeFinalize(Vdbe*);
-void sqlite3VdbeResolveLabel(Vdbe*, int);
-int sqlite3VdbeCurrentAddr(Vdbe*);
-void sqlite3VdbeTrace(Vdbe*,FILE*);
-int sqlite3VdbeReset(Vdbe*);
-int sqliteVdbeSetVariables(Vdbe*,int,const char**);
-void sqlite3VdbeSetNumCols(Vdbe*,int);
-int sqlite3VdbeSetColName(Vdbe*, int, const char *, int);
-void sqlite3VdbeCountChanges(Vdbe*);
-
-#ifndef NDEBUG
- void sqlite3VdbeComment(Vdbe*, const char*, ...);
-# define VdbeComment(X) sqlite3VdbeComment X
-#else
-# define VdbeComment(X)
-#endif
-
-#endif