drh
203 lines
6.3 KiB
C
203 lines
6.3 KiB
C
/*
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** Copyright (c) 1999, 2000 D. Richard Hipp
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**
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** This program is free software; you can redistribute it and/or
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** modify it under the terms of the GNU General Public
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** License as published by the Free Software Foundation; either
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** version 2 of the License, or (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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** General Public License for more details.
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**
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** You should have received a copy of the GNU General Public
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** License along with this library; if not, write to the
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** Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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** Boston, MA 02111-1307, USA.
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**
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** Author contact information:
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** drh@hwaci.com
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** http://www.hwaci.com/drh/
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**
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*************************************************************************
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** Header file for the Virtual DataBase Engine (VDBE)
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**
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** This header defines the interface to the virtual database engine
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** or VDBE. The VDBE implements an abstract machine that runs a
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** simple program to access and modify the underlying database.
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**
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** $Id: vdbe.h,v 1.15 2001/01/15 22:51:12 drh Exp $
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*/
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#ifndef _SQLITE_VDBE_H_
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#define _SQLITE_VDBE_H_
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#include <stdio.h>
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/*
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** A single VDBE is an opaque structure named "Vdbe". Only routines
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** in the source file sqliteVdbe.c are allowed to see the insides
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** of this structure.
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*/
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typedef struct Vdbe Vdbe;
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/*
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** A single instruction of the virtual machine has an opcode
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** and as many as three operands. The instruction is recorded
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** as an instance of the following structure:
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*/
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struct VdbeOp {
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int opcode; /* What operation to perform */
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int p1; /* First operand */
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int p2; /* Second parameter (often the jump destination) */
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char *p3; /* Third parameter */
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};
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typedef struct VdbeOp VdbeOp;
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/*
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** The following macro converts a relative address in the p2 field
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** of a VdbeOp structure into a negative number so that
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** sqliteVdbeAddOpList() knows that the address is relative. Calling
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** the macro again restores the address.
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*/
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#define ADDR(X) (-1-(X))
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/*
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** These are the available opcodes.
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**
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** If any of the values changes or if opcodes are added or removed,
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** be sure to also update the zOpName[] array in sqliteVdbe.c to
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** mirror the change.
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**
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** The source tree contains an AWK script named renumberOps.awk that
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** can be used to renumber these opcodes when new opcodes are inserted.
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*/
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#define OP_OpenIdx 1
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#define OP_OpenTbl 2
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#define OP_Close 3
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#define OP_Fetch 4
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#define OP_Fcnt 5
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#define OP_New 6
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#define OP_Put 7
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#define OP_Distinct 8
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#define OP_Found 9
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#define OP_NotFound 10
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#define OP_Delete 11
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#define OP_Field 12
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#define OP_KeyAsData 13
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#define OP_Key 14
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#define OP_Rewind 15
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#define OP_Next 16
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#define OP_Destroy 17
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#define OP_Reorganize 18
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#define OP_ResetIdx 19
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#define OP_NextIdx 20
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#define OP_PutIdx 21
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#define OP_DeleteIdx 22
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#define OP_MemLoad 23
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#define OP_MemStore 24
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#define OP_ListOpen 25
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#define OP_ListWrite 26
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#define OP_ListRewind 27
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#define OP_ListRead 28
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#define OP_ListClose 29
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#define OP_SortOpen 30
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#define OP_SortPut 31
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#define OP_SortMakeRec 32
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#define OP_SortMakeKey 33
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#define OP_Sort 34
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#define OP_SortNext 35
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#define OP_SortKey 36
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#define OP_SortCallback 37
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#define OP_SortClose 38
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#define OP_FileOpen 39
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#define OP_FileRead 40
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#define OP_FileField 41
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#define OP_FileClose 42
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#define OP_AggReset 43
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#define OP_AggFocus 44
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#define OP_AggIncr 45
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#define OP_AggNext 46
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#define OP_AggSet 47
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#define OP_AggGet 48
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#define OP_SetInsert 49
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#define OP_SetFound 50
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#define OP_SetNotFound 51
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#define OP_SetClear 52
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#define OP_MakeRecord 53
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#define OP_MakeKey 54
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#define OP_Goto 55
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#define OP_If 56
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#define OP_Halt 57
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#define OP_ColumnCount 58
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#define OP_ColumnName 59
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#define OP_Callback 60
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#define OP_Integer 61
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#define OP_String 62
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#define OP_Null 63
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#define OP_Pop 64
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#define OP_Dup 65
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#define OP_Pull 66
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#define OP_Add 67
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#define OP_AddImm 68
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#define OP_Subtract 69
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#define OP_Multiply 70
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#define OP_Divide 71
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#define OP_Min 72
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#define OP_Max 73
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#define OP_Like 74
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#define OP_Glob 75
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#define OP_Eq 76
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#define OP_Ne 77
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#define OP_Lt 78
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#define OP_Le 79
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#define OP_Gt 80
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#define OP_Ge 81
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#define OP_IsNull 82
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#define OP_NotNull 83
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#define OP_Negative 84
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#define OP_And 85
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#define OP_Or 86
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#define OP_Not 87
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#define OP_Concat 88
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#define OP_Noop 89
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#define OP_Strlen 90
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#define OP_Substr 91
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#define OP_MAX 91
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/*
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** Prototypes for the VDBE interface. See comments on the implementation
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** for a description of what each of these routines does.
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*/
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Vdbe *sqliteVdbeCreate(sqlite*);
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int sqliteVdbeAddOp(Vdbe*,int,int,int,const char*,int);
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int sqliteVdbeAddOpList(Vdbe*, int nOp, VdbeOp const *aOp);
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void sqliteVdbeChangeP3(Vdbe*, int addr, const char *zP1, int N);
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void sqliteVdbeDequoteP3(Vdbe*, int addr);
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int sqliteVdbeMakeLabel(Vdbe*);
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void sqliteVdbeDelete(Vdbe*);
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int sqliteVdbeOpcode(const char *zName);
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int sqliteVdbeExec(Vdbe*,sqlite_callback,void*,char**,void*,
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int(*)(void*,const char*,int));
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int sqliteVdbeList(Vdbe*,sqlite_callback,void*,char**);
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void sqliteVdbeResolveLabel(Vdbe*, int);
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int sqliteVdbeCurrentAddr(Vdbe*);
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void sqliteVdbeTrace(Vdbe*,FILE*);
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void sqliteVdbeCompressSpace(Vdbe*,int);
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#endif
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