Artifact 4a587ec56943d34698edf507ad5a746e87cb8cf4:

• File src/vdbe.h — part of check-in [e1370276] at 2001-11-01 14:41:34 on branch trunk — Remove cruft: restrict the number of sorters and lists in the VDBE to one since no more than one was ever used anyway. This eliminates several op-codes and simplifies the implementation of several others. (CVS 297) (user: drh size: 6992)

/*
** 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: vdbe.h,v 1.31 2001/11/01 14:41:34 drh Exp $
*/
#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 {
  int 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 */
};
typedef struct VdbeOp VdbeOp;

/*
** 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   (-1)  /* Pointer to a static string */
#define P3_POINTER  (-2)  /* P3 is a pointer to some structure or object */

/*
** The following macro converts a relative address in the p2 field
** of a VdbeOp structure into a negative number so that 
** sqliteVdbeAddOpList() knows that the address is relative.  Calling
** the macro again restores the address.
*/
#define ADDR(X)  (-1-(X))

/*
** These are the available opcodes.
**
** If any of the values changes or if opcodes are added or removed,
** be sure to also update the zOpName[] array in sqliteVdbe.c to
** mirror the change.
**
** The source tree contains an AWK script named renumberOps.awk that
** can be used to renumber these opcodes when new opcodes are inserted.
*/
#define OP_Transaction         1
#define OP_Commit              2
#define OP_Rollback            3

#define OP_ReadCookie          4
#define OP_SetCookie           5
#define OP_VerifyCookie        6

#define OP_Open                7
#define OP_OpenTemp            8
#define OP_OpenWrite           9
#define OP_OpenAux            10
#define OP_OpenWrAux          11
#define OP_Close              12
#define OP_MoveTo             13
#define OP_Fcnt               14
#define OP_NewRecno           15
#define OP_Put                16
#define OP_Distinct           17
#define OP_Found              18
#define OP_NotFound           19
#define OP_Delete             20
#define OP_Column             21
#define OP_KeyAsData          22
#define OP_Recno              23
#define OP_FullKey            24
#define OP_Rewind             25
#define OP_Next               26

#define OP_Destroy            27
#define OP_Clear              28
#define OP_CreateIndex        29
#define OP_CreateTable        30
#define OP_Reorganize         31

#define OP_BeginIdx           32
#define OP_NextIdx            33
#define OP_PutIdx             34
#define OP_DeleteIdx          35

#define OP_MemLoad            36
#define OP_MemStore           37

#define OP_ListWrite          38
#define OP_ListRewind         39
#define OP_ListRead           40
#define OP_ListReset          41

#define OP_SortPut            42
#define OP_SortMakeRec        43
#define OP_SortMakeKey        44
#define OP_Sort               45
#define OP_SortNext           46
#define OP_SortCallback       47
#define OP_SortReset          48

#define OP_FileOpen           49
#define OP_FileRead           50
#define OP_FileColumn         51
#define OP_FileClose          52

#define OP_AggReset           53
#define OP_AggFocus           54
#define OP_AggIncr            55
#define OP_AggNext            56
#define OP_AggSet             57
#define OP_AggGet             58

#define OP_SetInsert          59
#define OP_SetFound           60
#define OP_SetNotFound        61
#define OP_SetClear           62

#define OP_MakeRecord         63
#define OP_MakeKey            64
#define OP_MakeIdxKey         65

#define OP_Goto               66
#define OP_If                 67
#define OP_Halt               68

#define OP_ColumnCount        69
#define OP_ColumnName         70
#define OP_Callback           71
#define OP_NullCallback       72

#define OP_Integer            73
#define OP_String             74
#define OP_Null               75
#define OP_Pop                76
#define OP_Dup                77
#define OP_Pull               78

#define OP_Add                79
#define OP_AddImm             80
#define OP_Subtract           81
#define OP_Multiply           82
#define OP_Divide             83
#define OP_Remainder          84
#define OP_BitAnd             85
#define OP_BitOr              86
#define OP_BitNot             87
#define OP_ShiftLeft          88
#define OP_ShiftRight         89
#define OP_AbsValue           90
#define OP_Precision          91
#define OP_Min                92
#define OP_Max                93
#define OP_Like               94
#define OP_Glob               95
#define OP_Eq                 96
#define OP_Ne                 97
#define OP_Lt                 98
#define OP_Le                 99
#define OP_Gt                100
#define OP_Ge                101
#define OP_IsNull            102
#define OP_NotNull           103
#define OP_Negative          104
#define OP_And               105
#define OP_Or                106
#define OP_Not               107
#define OP_Concat            108
#define OP_Noop              109

#define OP_Strlen            110
#define OP_Substr            111

#define OP_MAX               111

/*
** Prototypes for the VDBE interface.  See comments on the implementation
** for a description of what each of these routines does.
*/
Vdbe *sqliteVdbeCreate(sqlite*);
void sqliteVdbeCreateCallback(Vdbe*, int*);
int sqliteVdbeAddOp(Vdbe*,int,int,int);
int sqliteVdbeAddOpList(Vdbe*, int nOp, VdbeOp const *aOp);
void sqliteVdbeChangeP1(Vdbe*, int addr, int P1);
void sqliteVdbeChangeP3(Vdbe*, int addr, char *zP1, int N);
void sqliteVdbeDequoteP3(Vdbe*, int addr);
int sqliteVdbeMakeLabel(Vdbe*);
void sqliteVdbeDelete(Vdbe*);
int sqliteVdbeOpcode(const char *zName);
int sqliteVdbeExec(Vdbe*,sqlite_callback,void*,char**,void*,
                   int(*)(void*,const char*,int));
int sqliteVdbeList(Vdbe*,sqlite_callback,void*,char**);
void sqliteVdbeResolveLabel(Vdbe*, int);
int sqliteVdbeCurrentAddr(Vdbe*);
void sqliteVdbeTrace(Vdbe*,FILE*);
void sqliteVdbeCompressSpace(Vdbe*,int);

#endif