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Diffstat (limited to 'digikam/libs/sqlite2/vdbe.h')
-rw-r--r-- | digikam/libs/sqlite2/vdbe.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/digikam/libs/sqlite2/vdbe.h b/digikam/libs/sqlite2/vdbe.h new file mode 100644 index 0000000..8dc1451 --- /dev/null +++ b/digikam/libs/sqlite2/vdbe.h @@ -0,0 +1,112 @@ +/* +** 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 326789 2004-07-07 21:25:56Z pahlibar $ +*/ +#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 */ + +/* +** 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)) + +/* +** 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 *sqliteVdbeCreate(sqlite*); +void sqliteVdbeCreateCallback(Vdbe*, int*); +int sqliteVdbeAddOp(Vdbe*,int,int,int); +int sqliteVdbeOp3(Vdbe*,int,int,int,const char *zP3,int); +int sqliteVdbeCode(Vdbe*,...); +int sqliteVdbeAddOpList(Vdbe*, int nOp, VdbeOpList const *aOp); +void sqliteVdbeChangeP1(Vdbe*, int addr, int P1); +void sqliteVdbeChangeP2(Vdbe*, int addr, int P2); +void sqliteVdbeChangeP3(Vdbe*, int addr, const char *zP1, int N); +void sqliteVdbeDequoteP3(Vdbe*, int addr); +int sqliteVdbeFindOp(Vdbe*, int, int); +VdbeOp *sqliteVdbeGetOp(Vdbe*, int); +int sqliteVdbeMakeLabel(Vdbe*); +void sqliteVdbeDelete(Vdbe*); +void sqliteVdbeMakeReady(Vdbe*,int,int); +int sqliteVdbeExec(Vdbe*); +int sqliteVdbeList(Vdbe*); +int sqliteVdbeFinalize(Vdbe*,char**); +void sqliteVdbeResolveLabel(Vdbe*, int); +int sqliteVdbeCurrentAddr(Vdbe*); +void sqliteVdbeTrace(Vdbe*,FILE*); +void sqliteVdbeCompressSpace(Vdbe*,int); +int sqliteVdbeReset(Vdbe*,char **); +int sqliteVdbeSetVariables(Vdbe*,int,const char**); + +#endif |