241 lines
8.5 KiB
C
241 lines
8.5 KiB
C
/*
|
|
** 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.
|
|
**
|
|
*************************************************************************
|
|
** This header file defines the interface that the sqlite B-Tree file
|
|
** subsystem. See comments in the source code for a detailed description
|
|
** of what each interface routine does.
|
|
*/
|
|
#ifndef _BTREE_H_
|
|
#define _BTREE_H_
|
|
|
|
/* TODO: This definition is just included so other modules compile. It
|
|
** needs to be revisited.
|
|
*/
|
|
#define SQLITE_N_BTREE_META 10
|
|
|
|
/*
|
|
** If defined as non-zero, auto-vacuum is enabled by default. Otherwise
|
|
** it must be turned on for each database using "PRAGMA auto_vacuum = 1".
|
|
*/
|
|
#ifndef SQLITE_DEFAULT_AUTOVACUUM
|
|
#define SQLITE_DEFAULT_AUTOVACUUM 0
|
|
#endif
|
|
|
|
#define BTREE_AUTOVACUUM_NONE 0 /* Do not do auto-vacuum */
|
|
#define BTREE_AUTOVACUUM_FULL 1 /* Do full auto-vacuum */
|
|
#define BTREE_AUTOVACUUM_INCR 2 /* Incremental vacuum */
|
|
|
|
/*
|
|
** Forward declarations of structure
|
|
*/
|
|
typedef struct Btree Btree;
|
|
typedef struct BtCursor BtCursor;
|
|
typedef struct BtShared BtShared;
|
|
|
|
|
|
int sqlite3BtreeOpen(
|
|
const char *zFilename, /* Name of database file to open */
|
|
sqlite3 *db, /* Associated database connection */
|
|
Btree **ppBtree, /* Return open Btree* here */
|
|
int flags, /* Flags */
|
|
int vfsFlags /* Flags passed through to VFS open */
|
|
);
|
|
|
|
/* The flags parameter to sqlite3BtreeOpen can be the bitwise or of the
|
|
** following values.
|
|
**
|
|
** NOTE: These values must match the corresponding PAGER_ values in
|
|
** pager.h.
|
|
*/
|
|
#define BTREE_OMIT_JOURNAL 1 /* Do not create or use a rollback journal */
|
|
#define BTREE_NO_READLOCK 2 /* Omit readlocks on readonly files */
|
|
#define BTREE_MEMORY 4 /* This is an in-memory DB */
|
|
#define BTREE_SINGLE 8 /* The file contains at most 1 b-tree */
|
|
#define BTREE_UNORDERED 16 /* Use of a hash implementation is OK */
|
|
|
|
int sqlite3BtreeClose(Btree*);
|
|
int sqlite3BtreeSetCacheSize(Btree*,int);
|
|
int sqlite3BtreeSetSafetyLevel(Btree*,int,int,int);
|
|
int sqlite3BtreeSyncDisabled(Btree*);
|
|
int sqlite3BtreeSetPageSize(Btree *p, int nPagesize, int nReserve, int eFix);
|
|
int sqlite3BtreeGetPageSize(Btree*);
|
|
int sqlite3BtreeMaxPageCount(Btree*,int);
|
|
u32 sqlite3BtreeLastPage(Btree*);
|
|
int sqlite3BtreeSecureDelete(Btree*,int);
|
|
int sqlite3BtreeGetReserve(Btree*);
|
|
int sqlite3BtreeSetAutoVacuum(Btree *, int);
|
|
int sqlite3BtreeGetAutoVacuum(Btree *);
|
|
int sqlite3BtreeBeginTrans(Btree*,int);
|
|
int sqlite3BtreeCommitPhaseOne(Btree*, const char *zMaster);
|
|
int sqlite3BtreeCommitPhaseTwo(Btree*, int);
|
|
int sqlite3BtreeCommit(Btree*);
|
|
int sqlite3BtreeRollback(Btree*);
|
|
int sqlite3BtreeBeginStmt(Btree*,int);
|
|
int sqlite3BtreeCreateTable(Btree*, int*, int flags);
|
|
int sqlite3BtreeIsInTrans(Btree*);
|
|
int sqlite3BtreeIsInReadTrans(Btree*);
|
|
int sqlite3BtreeIsInBackup(Btree*);
|
|
void *sqlite3BtreeSchema(Btree *, int, void(*)(void *));
|
|
int sqlite3BtreeSchemaLocked(Btree *pBtree);
|
|
int sqlite3BtreeLockTable(Btree *pBtree, int iTab, u8 isWriteLock);
|
|
int sqlite3BtreeSavepoint(Btree *, int, int);
|
|
|
|
const char *sqlite3BtreeGetFilename(Btree *);
|
|
const char *sqlite3BtreeGetJournalname(Btree *);
|
|
int sqlite3BtreeCopyFile(Btree *, Btree *);
|
|
|
|
int sqlite3BtreeIncrVacuum(Btree *);
|
|
|
|
/* The flags parameter to sqlite3BtreeCreateTable can be the bitwise OR
|
|
** of the flags shown below.
|
|
**
|
|
** Every SQLite table must have either BTREE_INTKEY or BTREE_BLOBKEY set.
|
|
** With BTREE_INTKEY, the table key is a 64-bit integer and arbitrary data
|
|
** is stored in the leaves. (BTREE_INTKEY is used for SQL tables.) With
|
|
** BTREE_BLOBKEY, the key is an arbitrary BLOB and no content is stored
|
|
** anywhere - the key is the content. (BTREE_BLOBKEY is used for SQL
|
|
** indices.)
|
|
*/
|
|
#define BTREE_INTKEY 1 /* Table has only 64-bit signed integer keys */
|
|
#define BTREE_BLOBKEY 2 /* Table has keys only - no data */
|
|
|
|
int sqlite3BtreeDropTable(Btree*, int, int*);
|
|
int sqlite3BtreeClearTable(Btree*, int, int*);
|
|
void sqlite3BtreeTripAllCursors(Btree*, int);
|
|
|
|
void sqlite3BtreeGetMeta(Btree *pBtree, int idx, u32 *pValue);
|
|
int sqlite3BtreeUpdateMeta(Btree*, int idx, u32 value);
|
|
|
|
/*
|
|
** The second parameter to sqlite3BtreeGetMeta or sqlite3BtreeUpdateMeta
|
|
** should be one of the following values. The integer values are assigned
|
|
** to constants so that the offset of the corresponding field in an
|
|
** SQLite database header may be found using the following formula:
|
|
**
|
|
** offset = 36 + (idx * 4)
|
|
**
|
|
** For example, the free-page-count field is located at byte offset 36 of
|
|
** the database file header. The incr-vacuum-flag field is located at
|
|
** byte offset 64 (== 36+4*7).
|
|
*/
|
|
#define BTREE_FREE_PAGE_COUNT 0
|
|
#define BTREE_SCHEMA_VERSION 1
|
|
#define BTREE_FILE_FORMAT 2
|
|
#define BTREE_DEFAULT_CACHE_SIZE 3
|
|
#define BTREE_LARGEST_ROOT_PAGE 4
|
|
#define BTREE_TEXT_ENCODING 5
|
|
#define BTREE_USER_VERSION 6
|
|
#define BTREE_INCR_VACUUM 7
|
|
|
|
int sqlite3BtreeCursor(
|
|
Btree*, /* BTree containing table to open */
|
|
int iTable, /* Index of root page */
|
|
int wrFlag, /* 1 for writing. 0 for read-only */
|
|
struct KeyInfo*, /* First argument to compare function */
|
|
BtCursor *pCursor /* Space to write cursor structure */
|
|
);
|
|
int sqlite3BtreeCursorSize(void);
|
|
void sqlite3BtreeCursorZero(BtCursor*);
|
|
|
|
int sqlite3BtreeCloseCursor(BtCursor*);
|
|
int sqlite3BtreeMovetoUnpacked(
|
|
BtCursor*,
|
|
UnpackedRecord *pUnKey,
|
|
i64 intKey,
|
|
int bias,
|
|
int *pRes
|
|
);
|
|
int sqlite3BtreeCursorHasMoved(BtCursor*, int*);
|
|
int sqlite3BtreeDelete(BtCursor*);
|
|
int sqlite3BtreeDeleteRange(BtCursor*, BtCursor*, int* stackBegin, int* stackEnd);
|
|
int sqlite3BtreeLazyDelete(BtCursor*, int* stackBegin, int* stackEnd, int desiredPages, int* pagesDeleted);
|
|
int sqlite3BtreeInsert(BtCursor*, const void *pKey, i64 nKey,
|
|
const void *pData, int nData,
|
|
int nZero, int bias, int seekResult);
|
|
int sqlite3BtreeFirst(BtCursor*, int *pRes);
|
|
int sqlite3BtreeLast(BtCursor*, int *pRes);
|
|
int sqlite3BtreeNext(BtCursor*, int *pRes);
|
|
int sqlite3BtreeEof(BtCursor*);
|
|
int sqlite3BtreePrevious(BtCursor*, int *pRes);
|
|
int sqlite3BtreeKeySize(BtCursor*, i64 *pSize);
|
|
int sqlite3BtreeKey(BtCursor*, u32 offset, u32 amt, void*);
|
|
const void *sqlite3BtreeKeyFetch(BtCursor*, int *pAmt);
|
|
const void *sqlite3BtreeDataFetch(BtCursor*, int *pAmt);
|
|
int sqlite3BtreeDataSize(BtCursor*, u32 *pSize);
|
|
int sqlite3BtreeData(BtCursor*, u32 offset, u32 amt, void*);
|
|
void sqlite3BtreeSetCachedRowid(BtCursor*, sqlite3_int64);
|
|
sqlite3_int64 sqlite3BtreeGetCachedRowid(BtCursor*);
|
|
|
|
char *sqlite3BtreeIntegrityCheck(Btree*, int *aRoot, int nRoot, int, int*, int);
|
|
struct Pager *sqlite3BtreePager(Btree*);
|
|
|
|
int sqlite3BtreePutData(BtCursor*, u32 offset, u32 amt, void*);
|
|
void sqlite3BtreeCacheOverflow(BtCursor *);
|
|
void sqlite3BtreeClearCursor(BtCursor *);
|
|
|
|
int sqlite3BtreeSetVersion(Btree *pBt, int iVersion);
|
|
|
|
#ifndef NDEBUG
|
|
int sqlite3BtreeCursorIsValid(BtCursor*);
|
|
#endif
|
|
|
|
#ifndef SQLITE_OMIT_BTREECOUNT
|
|
int sqlite3BtreeCount(BtCursor *, i64 *);
|
|
#endif
|
|
|
|
#ifdef SQLITE_TEST
|
|
int sqlite3BtreeCursorInfo(BtCursor*, int*, int);
|
|
void sqlite3BtreeCursorList(Btree*);
|
|
#endif
|
|
|
|
#ifndef SQLITE_OMIT_WAL
|
|
int sqlite3BtreeCheckpoint(Btree*, int, int *, int *);
|
|
#endif
|
|
|
|
/*
|
|
** If we are not using shared cache, then there is no need to
|
|
** use mutexes to access the BtShared structures. So make the
|
|
** Enter and Leave procedures no-ops.
|
|
*/
|
|
#ifndef SQLITE_OMIT_SHARED_CACHE
|
|
void sqlite3BtreeEnter(Btree*);
|
|
void sqlite3BtreeEnterAll(sqlite3*);
|
|
#else
|
|
# define sqlite3BtreeEnter(X)
|
|
# define sqlite3BtreeEnterAll(X)
|
|
#endif
|
|
|
|
#if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE
|
|
void sqlite3BtreeLeave(Btree*);
|
|
void sqlite3BtreeEnterCursor(BtCursor*);
|
|
void sqlite3BtreeLeaveCursor(BtCursor*);
|
|
void sqlite3BtreeLeaveAll(sqlite3*);
|
|
#ifndef NDEBUG
|
|
/* These routines are used inside assert() statements only. */
|
|
int sqlite3BtreeHoldsMutex(Btree*);
|
|
int sqlite3BtreeHoldsAllMutexes(sqlite3*);
|
|
int sqlite3SchemaMutexHeld(sqlite3*,int,Schema*);
|
|
#endif
|
|
#else
|
|
|
|
# define sqlite3BtreeLeave(X)
|
|
# define sqlite3BtreeEnterCursor(X)
|
|
# define sqlite3BtreeLeaveCursor(X)
|
|
# define sqlite3BtreeLeaveAll(X)
|
|
|
|
# define sqlite3BtreeHoldsMutex(X) 1
|
|
# define sqlite3BtreeHoldsAllMutexes(X) 1
|
|
# define sqlite3SchemaMutexHeld(X,Y,Z) 1
|
|
#endif
|
|
|
|
|
|
#endif /* _BTREE_H_ */
|