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src/vdbe.h
436 строк
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dan
Fix compiler warning an inefficiency introduced by previous commit.
17 мар 2026, 14:22
17 мар 2026, 14:22
8736da9
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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. */ #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; /* ** The names of the following types declared in vdbeInt.h are required ** for the VdbeOp definition. */ typedef struct sqlite3_value Mem; typedef struct SubProgram SubProgram; typedef struct SubrtnSig SubrtnSig; /* ** A signature for a reusable subroutine that materializes the RHS of ** an IN operator. */ struct SubrtnSig { int selId; /* SELECT-id for the SELECT statement on the RHS */ u8 bComplete; /* True if fully coded and available for reusable */ char *zAff; /* Affinity of the overall IN expression */ int iTable; /* Ephemeral table generated by the subroutine */ int iAddr; /* Subroutine entry address */ int regReturn; /* Register used to hold return address */ }; /* ** 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 */ signed char p4type; /* One of the P4_xxx constants for p4 */ u16 p5; /* Fifth parameter is an unsigned 16-bit integer */ int p1; /* First operand */ int p2; /* Second parameter (often the jump destination) */ int p3; /* The third parameter */ union p4union { /* fourth parameter */ int i; /* Integer value if p4type==P4_INT32 */ void *p; /* Generic pointer */ char *z; /* Pointer to data for string (char array) types */ i64 *pI64; /* Used when p4type is P4_INT64 */ double *pReal; /* Used when p4type is P4_REAL */ FuncDef *pFunc; /* Used when p4type is P4_FUNCDEF */ sqlite3_context *pCtx; /* Used when p4type is P4_FUNCCTX */ CollSeq *pColl; /* Used when p4type is P4_COLLSEQ */ Mem *pMem; /* Used when p4type is P4_MEM */ VTable *pVtab; /* Used when p4type is P4_VTAB */ KeyInfo *pKeyInfo; /* Used when p4type is P4_KEYINFO */ u32 *ai; /* Used when p4type is P4_INTARRAY */ SubProgram *pProgram; /* Used when p4type is P4_SUBPROGRAM */ Table *pTab; /* Used when p4type is P4_TABLE */ SubrtnSig *pSubrtnSig; /* Used when p4type is P4_SUBRTNSIG */ Index *pIdx; /* Used when p4type is P4_INDEX */ #ifdef SQLITE_ENABLE_CURSOR_HINTS Expr *pExpr; /* Used when p4type is P4_EXPR */ #endif } p4; #ifdef SQLITE_ENABLE_EXPLAIN_COMMENTS char *zComment; /* Comment to improve readability */ #endif #ifdef SQLITE_VDBE_COVERAGE u32 iSrcLine; /* Source-code line that generated this opcode ** with flags in the upper 8 bits */ #endif #if defined(SQLITE_ENABLE_STMT_SCANSTATUS) || defined(VDBE_PROFILE) u64 nExec; u64 nCycle; #endif }; typedef struct VdbeOp VdbeOp; /* ** A sub-routine used to implement a trigger program. */ struct SubProgram { VdbeOp *aOp; /* Array of opcodes for sub-program */ int nOp; /* Elements in aOp[] */ int nMem; /* Number of memory cells required */ int nCsr; /* Number of cursors required */ u8 *aOnce; /* Array of OP_Once flags */ void *token; /* id that may be used to recursive triggers */ SubProgram *pNext; /* Next sub-program already visited */ }; /* ** 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 */ signed char p2; /* Second parameter (often the jump destination) */ signed char p3; /* Third parameter */ }; typedef struct VdbeOpList VdbeOpList; /* ** Allowed values of VdbeOp.p4type */ #define P4_NOTUSED 0 /* The P4 parameter is not used */ #define P4_TRANSIENT 0 /* P4 is a pointer to a transient string */ #define P4_STATIC (-1) /* Pointer to a static string */ #define P4_COLLSEQ (-2) /* P4 is a pointer to a CollSeq structure */ #define P4_INT32 (-3) /* P4 is a 32-bit signed integer */ #define P4_SUBPROGRAM (-4) /* P4 is a pointer to a SubProgram structure */ #define P4_TABLE (-5) /* P4 is a pointer to a Table structure */ #define P4_INDEX (-6) /* P4 is a pointer to an Index structure */ /* Above do not own any resources. Must free those below */ #define P4_FREE_IF_LE (-7) #define P4_DYNAMIC (-7) /* Pointer to memory from sqliteMalloc() */ #define P4_FUNCDEF (-8) /* P4 is a pointer to a FuncDef structure */ #define P4_KEYINFO (-9) /* P4 is a pointer to a KeyInfo structure */ #define P4_EXPR (-10) /* P4 is a pointer to an Expr tree */ #define P4_MEM (-11) /* P4 is a pointer to a Mem* structure */ #define P4_VTAB (-12) /* P4 is a pointer to an sqlite3_vtab structure */ #define P4_REAL (-13) /* P4 is a 64-bit floating point value */ #define P4_INT64 (-14) /* P4 is a 64-bit signed integer */ #define P4_INTARRAY (-15) /* P4 is a vector of 32-bit integers */ #define P4_FUNCCTX (-16) /* P4 is a pointer to an sqlite3_context object */ #define P4_TABLEREF (-17) /* Like P4_TABLE, but reference counted */ #define P4_SUBRTNSIG (-18) /* P4 is a SubrtnSig pointer */ /* Error message codes for OP_Halt */ #define P5_ConstraintNotNull 1 #define P5_ConstraintUnique 2 #define P5_ConstraintCheck 3 #define P5_ConstraintFK 4 /* ** The Vdbe.aColName array contains 5n Mem structures, where n is the ** number of columns of data returned by the statement. */ #define COLNAME_NAME 0 #define COLNAME_DECLTYPE 1 #define COLNAME_DATABASE 2 #define COLNAME_TABLE 3 #define COLNAME_COLUMN 4 #ifdef SQLITE_ENABLE_COLUMN_METADATA # define COLNAME_N 5 /* Number of COLNAME_xxx symbols */ #else # ifdef SQLITE_OMIT_DECLTYPE # define COLNAME_N 1 /* Store only the name */ # else # define COLNAME_N 2 /* Store the name and decltype */ # endif #endif /* ** The following macro converts a label returned by sqlite3VdbeMakeLabel() ** into an index into the Parse.aLabel[] array that contains the resolved ** address of that label. */ #define ADDR(X) (~(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" /* ** Additional non-public SQLITE_PREPARE_* flags */ #define SQLITE_PREPARE_SAVESQL 0x80 /* Preserve SQL text */ #define SQLITE_PREPARE_MASK 0x3f /* Mask of public flags */ /* ** Prototypes for the VDBE interface. See comments on the implementation ** for a description of what each of these routines does. */ Vdbe *sqlite3VdbeCreate(Parse*); Parse *sqlite3VdbeParser(Vdbe*); int sqlite3VdbeAddOp0(Vdbe*,int); int sqlite3VdbeAddOp1(Vdbe*,int,int); int sqlite3VdbeAddOp2(Vdbe*,int,int,int); int sqlite3VdbeGoto(Vdbe*,int); int sqlite3VdbeLoadString(Vdbe*,int,const char*); void sqlite3VdbeMultiLoad(Vdbe*,int,const char*,...); int sqlite3VdbeAddOp3(Vdbe*,int,int,int,int); int sqlite3VdbeAddOp4(Vdbe*,int,int,int,int,const char *zP4,int); int sqlite3VdbeAddOp4Dup8(Vdbe*,int,int,int,int,const u8*,int); int sqlite3VdbeAddOp4Int(Vdbe*,int,int,int,int,int); int sqlite3VdbeAddFunctionCall(Parse*,int,int,int,int,const FuncDef*,int); void sqlite3VdbeEndCoroutine(Vdbe*,int); #if defined(SQLITE_DEBUG) && !defined(SQLITE_TEST_REALLOC_STRESS) void sqlite3VdbeVerifyNoMallocRequired(Vdbe *p, int N); void sqlite3VdbeVerifyNoResultRow(Vdbe *p); #else # define sqlite3VdbeVerifyNoMallocRequired(A,B) # define sqlite3VdbeVerifyNoResultRow(A) #endif #if defined(SQLITE_DEBUG) void sqlite3VdbeVerifyAbortable(Vdbe *p, int); void sqlite3VdbeNoJumpsOutsideSubrtn(Vdbe*,int,int,int); #else # define sqlite3VdbeVerifyAbortable(A,B) # define sqlite3VdbeNoJumpsOutsideSubrtn(A,B,C,D) #endif VdbeOp *sqlite3VdbeAddOpList(Vdbe*, int nOp, VdbeOpList const *aOp,int iLineno); #ifndef SQLITE_OMIT_EXPLAIN int sqlite3VdbeExplain(Parse*,u8,const char*,...); void sqlite3VdbeExplainPop(Parse*); int sqlite3VdbeExplainParent(Parse*); # define ExplainQueryPlan(P) sqlite3VdbeExplain P # ifdef SQLITE_ENABLE_STMT_SCANSTATUS # define ExplainQueryPlan2(V,P) (V = sqlite3VdbeExplain P) # else # define ExplainQueryPlan2(V,P) ExplainQueryPlan(P) # endif # define ExplainQueryPlanPop(P) sqlite3VdbeExplainPop(P) # define ExplainQueryPlanParent(P) sqlite3VdbeExplainParent(P) #else # define ExplainQueryPlan(P) # define ExplainQueryPlan2(V,P) # define ExplainQueryPlanPop(P) # define ExplainQueryPlanParent(P) 0 # define sqlite3ExplainBreakpoint(A,B) /*no-op*/ #endif #if defined(SQLITE_DEBUG) && !defined(SQLITE_OMIT_EXPLAIN) void sqlite3ExplainBreakpoint(const char*,const char*); #else # define sqlite3ExplainBreakpoint(A,B) /*no-op*/ #endif void sqlite3VdbeAddParseSchemaOp(Vdbe*, int, char*, u16); void sqlite3VdbeChangeOpcode(Vdbe*, int addr, u8); void sqlite3VdbeChangeP1(Vdbe*, int addr, int P1); void sqlite3VdbeChangeP2(Vdbe*, int addr, int P2); void sqlite3VdbeChangeP3(Vdbe*, int addr, int P3); void sqlite3VdbeChangeP5(Vdbe*, u16 P5); void sqlite3VdbeTypeofColumn(Vdbe*, int); void sqlite3VdbeJumpHere(Vdbe*, int addr); void sqlite3VdbeJumpHereOrPopInst(Vdbe*, int addr); int sqlite3VdbeChangeToNoop(Vdbe*, int addr); int sqlite3VdbeDeletePriorOpcode(Vdbe*, u8 op); #ifdef SQLITE_DEBUG void sqlite3VdbeReleaseRegisters(Parse*,int addr, int n, u32 mask, int); #else # define sqlite3VdbeReleaseRegisters(P,A,N,M,F) #endif void sqlite3VdbeChangeP4(Vdbe*, int addr, const char *zP4, int N); void sqlite3VdbeAppendP4(Vdbe*, void *pP4, int p4type); void sqlite3VdbeSetP4KeyInfo(Parse*, Index*); void sqlite3VdbeUsesBtree(Vdbe*, int); VdbeOp *sqlite3VdbeGetOp(Vdbe*, int); VdbeOp *sqlite3VdbeGetLastOp(Vdbe*); int sqlite3VdbeMakeLabel(Parse*); void sqlite3VdbeRunOnlyOnce(Vdbe*); void sqlite3VdbeReusable(Vdbe*); void sqlite3VdbeDelete(Vdbe*); void sqlite3VdbeMakeReady(Vdbe*,Parse*); int sqlite3VdbeFinalize(Vdbe*); void sqlite3VdbeResolveLabel(Vdbe*, int); int sqlite3VdbeCurrentAddr(Vdbe*); #ifdef SQLITE_DEBUG int sqlite3VdbeAssertMayAbort(Vdbe *, int); #endif void sqlite3VdbeResetStepResult(Vdbe*); void sqlite3VdbeRewind(Vdbe*); int sqlite3VdbeReset(Vdbe*); void sqlite3VdbeSetNumCols(Vdbe*,int); int sqlite3VdbeSetColName(Vdbe*, int, int, const char *, void(*)(void*)); void sqlite3VdbeCountChanges(Vdbe*); sqlite3 *sqlite3VdbeDb(Vdbe*); u8 sqlite3VdbePrepareFlags(Vdbe*); void sqlite3VdbeSetSql(Vdbe*, const char *z, int n, u8); #ifdef SQLITE_ENABLE_NORMALIZE void sqlite3VdbeAddDblquoteStr(sqlite3*,Vdbe*,const char*); int sqlite3VdbeUsesDoubleQuotedString(Vdbe*,const char*); #endif void sqlite3VdbeSwap(Vdbe*,Vdbe*); VdbeOp *sqlite3VdbeTakeOpArray(Vdbe*, int*, int*); sqlite3_value *sqlite3VdbeGetBoundValue(Vdbe*, int, u8); void sqlite3VdbeSetVarmask(Vdbe*, int); #ifndef SQLITE_OMIT_TRACE char *sqlite3VdbeExpandSql(Vdbe*, const char*); #endif int sqlite3MemCompare(const Mem*, const Mem*, const CollSeq*); int sqlite3BlobCompare(const Mem*, const Mem*); #ifdef SQLITE_ENABLE_PERCENTILE const char *sqlite3VdbeFuncName(const sqlite3_context*); #endif void sqlite3VdbeRecordUnpack(int,const void*,UnpackedRecord*); int sqlite3VdbeRecordCompare(int,const void*,UnpackedRecord*); int sqlite3VdbeRecordCompareWithSkip(int, const void *, UnpackedRecord *, int); UnpackedRecord *sqlite3VdbeAllocUnpackedRecord(KeyInfo*); typedef int (*RecordCompare)(int,const void*,UnpackedRecord*); RecordCompare sqlite3VdbeFindCompare(UnpackedRecord*); void sqlite3VdbeLinkSubProgram(Vdbe *, SubProgram *); int sqlite3VdbeHasSubProgram(Vdbe*); void sqlite3MemSetArrayInt64(sqlite3_value *aMem, int iIdx, i64 val); #ifndef SQLITE_OMIT_DATETIME_FUNCS int sqlite3NotPureFunc(sqlite3_context*); #endif #ifdef SQLITE_ENABLE_BYTECODE_VTAB int sqlite3VdbeBytecodeVtabInit(sqlite3*); #endif /* Use SQLITE_ENABLE_EXPLAIN_COMMENTS to enable generation of extra ** comments on each VDBE opcode. ** ** Use the SQLITE_ENABLE_MODULE_COMMENTS macro to see some extra no-op ** comments in VDBE programs that show key decision points in the code ** generator. */ #ifdef SQLITE_ENABLE_EXPLAIN_COMMENTS void sqlite3VdbeComment(Vdbe*, const char*, ...); # define VdbeComment(X) sqlite3VdbeComment X void sqlite3VdbeNoopComment(Vdbe*, const char*, ...); # define VdbeNoopComment(X) sqlite3VdbeNoopComment X # ifdef SQLITE_ENABLE_MODULE_COMMENTS # define VdbeModuleComment(X) sqlite3VdbeNoopComment X # else # define VdbeModuleComment(X) # endif #else # define VdbeComment(X) # define VdbeNoopComment(X) # define VdbeModuleComment(X) #endif /* ** The VdbeCoverage macros are used to set a coverage testing point ** for VDBE branch instructions. The coverage testing points are line ** numbers in the sqlite3.c source file. VDBE branch coverage testing ** only works with an amalgamation build. That's ok since a VDBE branch ** coverage build designed for testing the test suite only. No application ** should ever ship with VDBE branch coverage measuring turned on. ** ** VdbeCoverage(v) // Mark the previously coded instruction ** // as a branch ** ** VdbeCoverageIf(v, conditional) // Mark previous if conditional true ** ** VdbeCoverageAlwaysTaken(v) // Previous branch is always taken ** ** VdbeCoverageNeverTaken(v) // Previous branch is never taken ** ** VdbeCoverageNeverNull(v) // Previous three-way branch is only ** // taken on the first two ways. The ** // NULL option is not possible ** ** VdbeCoverageEqNe(v) // Previous OP_Jump is only interested ** // in distinguishing equal and not-equal. ** ** Every VDBE branch operation must be tagged with one of the macros above. ** If not, then when "make test" is run with -DSQLITE_VDBE_COVERAGE and ** -DSQLITE_DEBUG then an ALWAYS() will fail in the vdbeTakeBranch() ** routine in vdbe.c, alerting the developer to the missed tag. ** ** During testing, the test application will invoke ** sqlite3_test_control(SQLITE_TESTCTRL_VDBE_COVERAGE,...) to set a callback ** routine that is invoked as each bytecode branch is taken. The callback ** contains the sqlite3.c source line number of the VdbeCoverage macro and ** flags to indicate whether or not the branch was taken. The test application ** is responsible for keeping track of this and reporting byte-code branches ** that are never taken. ** ** See the VdbeBranchTaken() macro and vdbeTakeBranch() function in the ** vdbe.c source file for additional information. */ #ifdef SQLITE_VDBE_COVERAGE void sqlite3VdbeSetLineNumber(Vdbe*,int); # define VdbeCoverage(v) sqlite3VdbeSetLineNumber(v,__LINE__) # define VdbeCoverageIf(v,x) if(x)sqlite3VdbeSetLineNumber(v,__LINE__) # define VdbeCoverageAlwaysTaken(v) \ sqlite3VdbeSetLineNumber(v,__LINE__|0x5000000); # define VdbeCoverageNeverTaken(v) \ sqlite3VdbeSetLineNumber(v,__LINE__|0x6000000); # define VdbeCoverageNeverNull(v) \ sqlite3VdbeSetLineNumber(v,__LINE__|0x4000000); # define VdbeCoverageNeverNullIf(v,x) \ if(x)sqlite3VdbeSetLineNumber(v,__LINE__|0x4000000); # define VdbeCoverageEqNe(v) \ sqlite3VdbeSetLineNumber(v,__LINE__|0x8000000); # define VDBE_OFFSET_LINENO(x) (__LINE__+x) #else # define VdbeCoverage(v) # define VdbeCoverageIf(v,x) # define VdbeCoverageAlwaysTaken(v) # define VdbeCoverageNeverTaken(v) # define VdbeCoverageNeverNull(v) # define VdbeCoverageNeverNullIf(v,x) # define VdbeCoverageEqNe(v) # define VDBE_OFFSET_LINENO(x) 0 #endif #ifdef SQLITE_ENABLE_STMT_SCANSTATUS void sqlite3VdbeScanStatus(Vdbe*, int, int, int, LogEst, const char*); void sqlite3VdbeScanStatusRange(Vdbe*, int, int, int); void sqlite3VdbeScanStatusCounters(Vdbe*, int, int, int); #else # define sqlite3VdbeScanStatus(a,b,c,d,e,f) # define sqlite3VdbeScanStatusRange(a,b,c,d) # define sqlite3VdbeScanStatusCounters(a,b,c,d) #endif #if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE) void sqlite3VdbePrintOp(FILE*, int, VdbeOp*); #endif #if defined(SQLITE_ENABLE_CURSOR_HINTS) && defined(SQLITE_DEBUG) int sqlite3CursorRangeHintExprCheck(Walker *pWalker, Expr *pExpr); #endif #endif /* SQLITE_VDBE_H */