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Diffstat (limited to 'src/runtime/c/sg/sqlite3Btree.h')
| -rw-r--r-- | src/runtime/c/sg/sqlite3Btree.h | 705 |
1 files changed, 705 insertions, 0 deletions
diff --git a/src/runtime/c/sg/sqlite3Btree.h b/src/runtime/c/sg/sqlite3Btree.h new file mode 100644 index 000000000..b66b53c7e --- /dev/null +++ b/src/runtime/c/sg/sqlite3Btree.h @@ -0,0 +1,705 @@ +/* +** 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_ + +/* +** The SQLITE_THREADSAFE macro must be defined as 0, 1, or 2. +** 0 means mutexes are permanently disable and the library is never +** threadsafe. 1 means the library is serialized which is the highest +** level of threadsafety. 2 means the library is multithreaded - multiple +** threads can use SQLite as long as no two threads try to use the same +** database connection at the same time. +** +** Older versions of SQLite used an optional THREADSAFE macro. +** We support that for legacy. +*/ +#if !defined(SQLITE_THREADSAFE) +# if defined(THREADSAFE) +# define SQLITE_THREADSAFE THREADSAFE +# else +# define SQLITE_THREADSAFE 1 /* IMP: R-07272-22309 */ +# endif +#endif + +/* +** CAPI3REF: 64-Bit Integer Types +** KEYWORDS: sqlite_int64 sqlite_uint64 +** +** Because there is no cross-platform way to specify 64-bit integer types +** SQLite includes typedefs for 64-bit signed and unsigned integers. +** +** The sqlite3_int64 and sqlite3_uint64 are the preferred type definitions. +** The sqlite_int64 and sqlite_uint64 types are supported for backwards +** compatibility only. +** +** ^The sqlite3_int64 and sqlite_int64 types can store integer values +** between -9223372036854775808 and +9223372036854775807 inclusive. ^The +** sqlite3_uint64 and sqlite_uint64 types can store integer values +** between 0 and +18446744073709551615 inclusive. +*/ +#ifdef SQLITE_INT64_TYPE + typedef SQLITE_INT64_TYPE sqlite_int64; + typedef unsigned SQLITE_INT64_TYPE sqlite_uint64; +#elif defined(_MSC_VER) || defined(__BORLANDC__) + typedef __int64 sqlite_int64; + typedef unsigned __int64 sqlite_uint64; +#else + typedef long long int sqlite_int64; + typedef unsigned long long int sqlite_uint64; +#endif +typedef sqlite_int64 sqlite3_int64; +typedef sqlite_uint64 sqlite3_uint64; + +/* +** Integers of known sizes. These typedefs might change for architectures +** where the sizes very. Preprocessor macros are available so that the +** types can be conveniently redefined at compile-type. Like this: +** +** cc '-DUINTPTR_TYPE=long long int' ... +*/ +#ifndef UINT32_TYPE +# ifdef HAVE_UINT32_T +# define UINT32_TYPE uint32_t +# else +# define UINT32_TYPE unsigned int +# endif +#endif +#ifndef UINT16_TYPE +# ifdef HAVE_UINT16_T +# define UINT16_TYPE uint16_t +# else +# define UINT16_TYPE unsigned short int +# endif +#endif +#ifndef INT16_TYPE +# ifdef HAVE_INT16_T +# define INT16_TYPE int16_t +# else +# define INT16_TYPE short int +# endif +#endif +#ifndef UINT8_TYPE +# ifdef HAVE_UINT8_T +# define UINT8_TYPE uint8_t +# else +# define UINT8_TYPE unsigned char +# endif +#endif +#ifndef INT8_TYPE +# ifdef HAVE_INT8_T +# define INT8_TYPE int8_t +# else +# define INT8_TYPE signed char +# endif +#endif +#ifndef LONGDOUBLE_TYPE +# define LONGDOUBLE_TYPE long double +#endif +typedef sqlite_int64 i64; /* 8-byte signed integer */ +typedef sqlite_uint64 u64; /* 8-byte unsigned integer */ +typedef UINT32_TYPE u32; /* 4-byte unsigned integer */ +typedef UINT16_TYPE u16; /* 2-byte unsigned integer */ +typedef INT16_TYPE i16; /* 2-byte signed integer */ +typedef UINT8_TYPE u8; /* 1-byte unsigned integer */ +typedef INT8_TYPE i8; /* 1-byte signed integer */ + +/* TODO: This definition is just included so other modules compile. It +** needs to be revisited. +*/ +#define SQLITE_N_BTREE_META 16 + +/* +** 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 */ + +/* +** CAPI3REF: Initialize The SQLite Library +** +** ^The sqlite3BtreeInitialize() routine initializes the +** SQLite library. ^The sqlite3BtreeShutdown() routine +** deallocates any resources that were allocated by sqlite3BtreeInitialize(). +** These routines are designed to aid in process initialization and +** shutdown on embedded systems. Workstation applications using +** SQLite normally do not need to invoke either of these routines. +** +** A call to sqlite3BtreeInitialize() is an "effective" call if it is +** the first time sqlite3BtreeInitialize() is invoked during the lifetime of +** the process, or if it is the first time sqlite3BtreeInitialize() is invoked +** following a call to sqlite3BtreeShutdown(). ^(Only an effective call +** of sqlite3BtreeInitialize() does any initialization. All other calls +** are harmless no-ops.)^ +** +** A call to sqlite3BtreeShutdown() is an "effective" call if it is the first +** call to sqlite3BtreeShutdown() since the last sqlite3BtreeInitialize(). ^(Only +** an effective call to sqlite3BtreeShutdown() does any deinitialization. +** All other valid calls to sqlite3BtreeShutdown() are harmless no-ops.)^ +** +** The sqlite3BtreeInitialize() interface is threadsafe, but sqlite3BtreeShutdown() +** is not. The sqlite3BtreeShutdown() interface must only be called from a +** single thread. All open [database connections] must be closed and all +** other SQLite resources must be deallocated prior to invoking +** sqlite3BtreeShutdown(). +** +** Among other things, ^sqlite3BtreeInitialize() will invoke +** sqlite3_os_init(). Similarly, ^sqlite3BtreeShutdown() +** will invoke sqlite3_os_end(). +** +** ^The sqlite3BtreeInitialize() routine returns [SQLITE_OK] on success. +** ^If for some reason, sqlite3BtreeInitialize() is unable to initialize +** the library (perhaps it is unable to allocate a needed resource such +** as a mutex) it returns an [error code] other than [SQLITE_OK]. +** +** ^The sqlite3BtreeInitialize() routine is called internally by many other +** SQLite interfaces so that an application usually does not need to +** invoke sqlite3BtreeInitialize() directly. For example, [sqlite3_open()] +** calls sqlite3BtreeInitialize() so the SQLite library will be automatically +** initialized when [sqlite3_open()] is called if it has not be initialized +** already. ^However, if SQLite is compiled with the [SQLITE_OMIT_AUTOINIT] +** compile-time option, then the automatic calls to sqlite3BtreeInitialize() +** are omitted and the application must call sqlite3BtreeInitialize() directly +** prior to using any other SQLite interface. For maximum portability, +** it is recommended that applications always invoke sqlite3BtreeInitialize() +** directly prior to using any other SQLite interface. Future releases +** of SQLite may require this. In other words, the behavior exhibited +** when SQLite is compiled with [SQLITE_OMIT_AUTOINIT] might become the +** default behavior in some future release of SQLite. +** +** The sqlite3_os_init() routine does operating-system specific +** initialization of the SQLite library. The sqlite3_os_end() +** routine undoes the effect of sqlite3_os_init(). Typical tasks +** performed by these routines include allocation or deallocation +** of static resources, initialization of global variables, +** setting up a default [sqlite3_vfs] module, or setting up +** a default configuration using [sqlite3_config()]. +** +** The application should never invoke either sqlite3_os_init() +** or sqlite3_os_end() directly. The application should only invoke +** sqlite3BtreeInitialize() and sqlite3BtreeShutdown(). The sqlite3_os_init() +** interface is called automatically by sqlite3BtreeInitialize() and +** sqlite3_os_end() is called by sqlite3BtreeShutdown(). Appropriate +** implementations for sqlite3_os_init() and sqlite3_os_end() +** are built into SQLite when it is compiled for Unix, Windows, or OS/2. +** When [custom builds | built for other platforms] +** (using the [SQLITE_OS_OTHER=1] compile-time +** option) the application must supply a suitable implementation for +** sqlite3_os_init() and sqlite3_os_end(). An application-supplied +** implementation of sqlite3_os_init() or sqlite3_os_end() +** must return [SQLITE_OK] on success and some other [error code] upon +** failure. +*/ +int sqlite3BtreeInitialize(void); +int sqlite3BtreeShutdown(void); + +/* +** CAPI3REF: Result Codes +** KEYWORDS: {result code definitions} +** +** Many SQLite functions return an integer result code from the set shown +** here in order to indicate success or failure. +** +** New error codes may be added in future versions of SQLite. +** +** See also: [extended result code definitions] +*/ +#define SQLITE_OK 0 /* Successful result */ +/* beginning-of-error-codes */ +#define SQLITE_ERROR 1 /* SQL error or missing database */ +#define SQLITE_INTERNAL 2 /* Internal logic error in SQLite */ +#define SQLITE_PERM 3 /* Access permission denied */ +#define SQLITE_ABORT 4 /* Callback routine requested an abort */ +#define SQLITE_BUSY 5 /* The database file is locked */ +#define SQLITE_LOCKED 6 /* A table in the database is locked */ +#define SQLITE_NOMEM 7 /* A malloc() failed */ +#define SQLITE_READONLY 8 /* Attempt to write a readonly database */ +#define SQLITE_INTERRUPT 9 /* Operation terminated by sqlite3_interrupt()*/ +#define SQLITE_IOERR 10 /* Some kind of disk I/O error occurred */ +#define SQLITE_CORRUPT 11 /* The database disk image is malformed */ +#define SQLITE_NOTFOUND 12 /* Unknown opcode in sqlite3_file_control() */ +#define SQLITE_FULL 13 /* Insertion failed because database is full */ +#define SQLITE_CANTOPEN 14 /* Unable to open the database file */ +#define SQLITE_PROTOCOL 15 /* Database lock protocol error */ +#define SQLITE_EMPTY 16 /* Database is empty */ +#define SQLITE_SCHEMA 17 /* The database schema changed */ +#define SQLITE_TOOBIG 18 /* String or BLOB exceeds size limit */ +#define SQLITE_CONSTRAINT 19 /* Abort due to constraint violation */ +#define SQLITE_MISMATCH 20 /* Data type mismatch */ +#define SQLITE_MISUSE 21 /* Library used incorrectly */ +#define SQLITE_NOLFS 22 /* Uses OS features not supported on host */ +#define SQLITE_AUTH 23 /* Authorization denied */ +#define SQLITE_FORMAT 24 /* Auxiliary database format error */ +#define SQLITE_RANGE 25 /* 2nd parameter to sqlite3_bind out of range */ +#define SQLITE_NOTADB 26 /* File opened that is not a database file */ +#define SQLITE_NOTICE 27 /* Notifications from sqlite3_log() */ +#define SQLITE_WARNING 28 /* Warnings from sqlite3_log() */ +#define SQLITE_ROW 100 /* sqlite3_step() has another row ready */ +#define SQLITE_DONE 101 /* sqlite3_step() has finished executing */ +/* end-of-error-codes */ + +/* +** CAPI3REF: Extended Result Codes +** KEYWORDS: {extended result code definitions} +** +** In its default configuration, SQLite API routines return one of 30 integer +** [result codes]. However, experience has shown that many of +** these result codes are too coarse-grained. They do not provide as +** much information about problems as programmers might like. In an effort to +** address this, newer versions of SQLite (version 3.3.8 and later) include +** support for additional result codes that provide more detailed information +** about errors. These [extended result codes] are enabled or disabled +** on a per database connection basis using the +** [sqlite3_extended_result_codes()] API. Or, the extended code for +** the most recent error can be obtained using +** [sqlite3_extended_errcode()]. +*/ +#define SQLITE_IOERR_READ (SQLITE_IOERR | (1<<8)) +#define SQLITE_IOERR_SHORT_READ (SQLITE_IOERR | (2<<8)) +#define SQLITE_IOERR_WRITE (SQLITE_IOERR | (3<<8)) +#define SQLITE_IOERR_FSYNC (SQLITE_IOERR | (4<<8)) +#define SQLITE_IOERR_DIR_FSYNC (SQLITE_IOERR | (5<<8)) +#define SQLITE_IOERR_TRUNCATE (SQLITE_IOERR | (6<<8)) +#define SQLITE_IOERR_FSTAT (SQLITE_IOERR | (7<<8)) +#define SQLITE_IOERR_UNLOCK (SQLITE_IOERR | (8<<8)) +#define SQLITE_IOERR_RDLOCK (SQLITE_IOERR | (9<<8)) +#define SQLITE_IOERR_DELETE (SQLITE_IOERR | (10<<8)) +#define SQLITE_IOERR_BLOCKED (SQLITE_IOERR | (11<<8)) +#define SQLITE_IOERR_NOMEM (SQLITE_IOERR | (12<<8)) +#define SQLITE_IOERR_ACCESS (SQLITE_IOERR | (13<<8)) +#define SQLITE_IOERR_CHECKRESERVEDLOCK (SQLITE_IOERR | (14<<8)) +#define SQLITE_IOERR_LOCK (SQLITE_IOERR | (15<<8)) +#define SQLITE_IOERR_CLOSE (SQLITE_IOERR | (16<<8)) +#define SQLITE_IOERR_DIR_CLOSE (SQLITE_IOERR | (17<<8)) +#define SQLITE_IOERR_SHMOPEN (SQLITE_IOERR | (18<<8)) +#define SQLITE_IOERR_SHMSIZE (SQLITE_IOERR | (19<<8)) +#define SQLITE_IOERR_SHMLOCK (SQLITE_IOERR | (20<<8)) +#define SQLITE_IOERR_SHMMAP (SQLITE_IOERR | (21<<8)) +#define SQLITE_IOERR_SEEK (SQLITE_IOERR | (22<<8)) +#define SQLITE_IOERR_DELETE_NOENT (SQLITE_IOERR | (23<<8)) +#define SQLITE_IOERR_MMAP (SQLITE_IOERR | (24<<8)) +#define SQLITE_IOERR_GETTEMPPATH (SQLITE_IOERR | (25<<8)) +#define SQLITE_IOERR_CONVPATH (SQLITE_IOERR | (26<<8)) +#define SQLITE_IOERR_VNODE (SQLITE_IOERR | (27<<8)) +#define SQLITE_LOCKED_SHAREDCACHE (SQLITE_LOCKED | (1<<8)) +#define SQLITE_BUSY_RECOVERY (SQLITE_BUSY | (1<<8)) +#define SQLITE_BUSY_SNAPSHOT (SQLITE_BUSY | (2<<8)) +#define SQLITE_CANTOPEN_NOTEMPDIR (SQLITE_CANTOPEN | (1<<8)) +#define SQLITE_CANTOPEN_ISDIR (SQLITE_CANTOPEN | (2<<8)) +#define SQLITE_CANTOPEN_FULLPATH (SQLITE_CANTOPEN | (3<<8)) +#define SQLITE_CANTOPEN_CONVPATH (SQLITE_CANTOPEN | (4<<8)) +#define SQLITE_CORRUPT_VTAB (SQLITE_CORRUPT | (1<<8)) +#define SQLITE_READONLY_RECOVERY (SQLITE_READONLY | (1<<8)) +#define SQLITE_READONLY_CANTLOCK (SQLITE_READONLY | (2<<8)) +#define SQLITE_READONLY_ROLLBACK (SQLITE_READONLY | (3<<8)) +#define SQLITE_READONLY_DBMOVED (SQLITE_READONLY | (4<<8)) +#define SQLITE_ABORT_ROLLBACK (SQLITE_ABORT | (2<<8)) +#define SQLITE_CONSTRAINT_CHECK (SQLITE_CONSTRAINT | (1<<8)) +#define SQLITE_CONSTRAINT_COMMITHOOK (SQLITE_CONSTRAINT | (2<<8)) +#define SQLITE_CONSTRAINT_FOREIGNKEY (SQLITE_CONSTRAINT | (3<<8)) +#define SQLITE_CONSTRAINT_FUNCTION (SQLITE_CONSTRAINT | (4<<8)) +#define SQLITE_CONSTRAINT_NOTNULL (SQLITE_CONSTRAINT | (5<<8)) +#define SQLITE_CONSTRAINT_PRIMARYKEY (SQLITE_CONSTRAINT | (6<<8)) +#define SQLITE_CONSTRAINT_TRIGGER (SQLITE_CONSTRAINT | (7<<8)) +#define SQLITE_CONSTRAINT_UNIQUE (SQLITE_CONSTRAINT | (8<<8)) +#define SQLITE_CONSTRAINT_VTAB (SQLITE_CONSTRAINT | (9<<8)) +#define SQLITE_CONSTRAINT_ROWID (SQLITE_CONSTRAINT |(10<<8)) +#define SQLITE_NOTICE_RECOVER_WAL (SQLITE_NOTICE | (1<<8)) +#define SQLITE_NOTICE_RECOVER_ROLLBACK (SQLITE_NOTICE | (2<<8)) +#define SQLITE_WARNING_AUTOINDEX (SQLITE_WARNING | (1<<8)) +#define SQLITE_AUTH_USER (SQLITE_AUTH | (1<<8)) + +/* Reserved: 0x00F00000 */ + +/* +** Forward declarations of structure +*/ +typedef struct Btree Btree; +typedef struct BtCursor BtCursor; +typedef struct BtShared BtShared; +typedef struct Mem Mem; +typedef struct KeyInfo KeyInfo; +typedef struct UnpackedRecord UnpackedRecord; + + +int sqlite3BtreeOpen( + const char *zVfs, /* VFS to use with this b-tree */ + const char *zFilename, /* Name of database file to open */ + 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_MEMORY 2 /* This is an in-memory DB */ +#define BTREE_SINGLE 4 /* The file contains at most 1 b-tree */ +#define BTREE_UNORDERED 8 /* Use of a hash implementation is OK */ + +/* +** CAPI3REF: Flags For File Open Operations +** +** These bit values are intended for use in the +** 3rd parameter to the [sqlite3_open_v2()] interface and +** in the 4th parameter to the [sqlite3_vfs.xOpen] method. +*/ +#define SQLITE_OPEN_READONLY 0x00000001 /* Ok for sqlite3_open_v2() */ +#define SQLITE_OPEN_READWRITE 0x00000002 /* Ok for sqlite3_open_v2() */ +#define SQLITE_OPEN_CREATE 0x00000004 /* Ok for sqlite3_open_v2() */ +#define SQLITE_OPEN_DELETEONCLOSE 0x00000008 /* VFS only */ +#define SQLITE_OPEN_EXCLUSIVE 0x00000010 /* VFS only */ +#define SQLITE_OPEN_AUTOPROXY 0x00000020 /* VFS only */ +#define SQLITE_OPEN_URI 0x00000040 /* Ok for sqlite3_open_v2() */ +#define SQLITE_OPEN_MEMORY 0x00000080 /* Ok for sqlite3_open_v2() */ +#define SQLITE_OPEN_MAIN_DB 0x00000100 /* VFS only */ +#define SQLITE_OPEN_TEMP_DB 0x00000200 /* VFS only */ +#define SQLITE_OPEN_TRANSIENT_DB 0x00000400 /* VFS only */ +#define SQLITE_OPEN_MAIN_JOURNAL 0x00000800 /* VFS only */ +#define SQLITE_OPEN_TEMP_JOURNAL 0x00001000 /* VFS only */ +#define SQLITE_OPEN_SUBJOURNAL 0x00002000 /* VFS only */ +#define SQLITE_OPEN_MASTER_JOURNAL 0x00004000 /* VFS only */ +#define SQLITE_OPEN_NOMUTEX 0x00008000 /* Ok for sqlite3_open_v2() */ +#define SQLITE_OPEN_FULLMUTEX 0x00010000 /* Ok for sqlite3_open_v2() */ +#define SQLITE_OPEN_SHAREDCACHE 0x00020000 /* Ok for sqlite3_open_v2() */ +#define SQLITE_OPEN_PRIVATECACHE 0x00040000 /* Ok for sqlite3_open_v2() */ +#define SQLITE_OPEN_WAL 0x00080000 /* VFS only */ + +int sqlite3BtreeClose(Btree*); +int sqlite3BtreeSetCacheSize(Btree*,int); +#if SQLITE_MAX_MMAP_SIZE>0 + int sqlite3BtreeSetMmapLimit(Btree*,sqlite3_int64); +#endif +int sqlite3BtreeSetPagerFlags(Btree*,unsigned); +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 sqlite3BtreeGetOptimalReserve(Btree*); +int sqlite3BtreeGetReserveNoMutex(Btree *p); +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,int); +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); + +int sqlite3BtreeFileFormat(Btree *); +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*); +int sqlite3BtreeClearTableOfCursor(BtCursor*); +int sqlite3BtreeTripAllCursors(Btree*, int, int); + +void sqlite3BtreeGetMeta(Btree *pBtree, int idx, u32 *pValue); +int sqlite3BtreeUpdateMeta(Btree*, int idx, u32 value); + +int sqlite3BtreeNewDb(Btree *p); + +/* +** 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). +** +** The BTREE_DATA_VERSION value is not really a value stored in the header. +** It is a read-only number computed by the pager. But we merge it with +** the header value access routines since its access pattern is the same. +** Call it a "virtual meta value". +*/ +#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 +#define BTREE_APPLICATION_ID 8 +#define BTREE_DATA_VERSION 15 /* A virtual meta-value */ + +/* +** An instance of the following structure holds information about a +** single index record that has already been parsed out into individual +** values. +** +** A record is an object that contains one or more fields of data. +** Records are used to store the content of a table row and to store +** the key of an index. A blob encoding of a record is created by +** the OP_MakeRecord opcode of the VDBE and is disassembled by the +** OP_Column opcode. +** +** This structure holds a record that has already been disassembled +** into its constituent fields. +** +** The r1 and r2 member variables are only used by the optimized comparison +** functions vdbeRecordCompareInt() and vdbeRecordCompareString(). +*/ +struct UnpackedRecord { + KeyInfo *pKeyInfo; /* Collation and sort-order information */ + u16 nField; /* Number of entries in apMem[] */ + i8 default_rc; /* Comparison result if keys are equal */ + u8 errCode; /* Error detected by xRecordCompare (CORRUPT or NOMEM) */ + Mem *aMem; /* Values */ + int r1; /* Value to return if (lhs > rhs) */ + int r2; /* Value to return if (rhs < lhs) */ +}; + +/* One or more of the following flags are set to indicate the validOK +** representations of the value stored in the Mem struct. +** +** If the MEM_Null flag is set, then the value is an SQL NULL value. +** No other flags may be set in this case. +** +** If the MEM_Str flag is set then Mem.z points at a string representation. +** Usually this is encoded in the same unicode encoding as the main +** database (see below for exceptions). If the MEM_Term flag is also +** set, then the string is nul terminated. The MEM_Int and MEM_Real +** flags may coexist with the MEM_Str flag. +*/ +#define MEM_Null 0x0001 /* Value is NULL */ +#define MEM_Str 0x0002 /* Value is a string */ +#define MEM_Int 0x0004 /* Value is an integer */ +#define MEM_Real 0x0008 /* Value is a real number */ +#define MEM_Blob 0x0010 /* Value is a BLOB */ + +#define MEM_Term 0x0200 /* String rep is nul terminated */ +#define MEM_Dyn 0x0400 /* Need to call Mem.xDel() on Mem.z */ +#define MEM_Static 0x0800 /* Mem.z points to a static string */ +#define MEM_Ephem 0x1000 /* Mem.z points to an ephemeral string */ +#define MEM_Zero 0x4000 /* Mem.i contains count of 0s appended to blob */ + +/* +** Internally, the vdbe manipulates nearly all SQL values as Mem +** structures. Each Mem struct may cache multiple representations (string, +** integer etc.) of the same value. +*/ +struct Mem { + union MemValue { + double r; /* Real value used when MEM_Real is set in flags */ + i64 i; /* Integer value used when MEM_Int is set in flags */ + int nZero; /* Used when bit MEM_Zero is set in flags */ + } u; + u16 flags; /* Some combination of MEM_Null, MEM_Str, MEM_Dyn, etc. */ + u8 enc; /* SQLITE_UTF8, SQLITE_UTF16BE, SQLITE_UTF16LE */ + u8 eSubtype; /* Subtype for this value */ + int n; /* Number of characters in string value, excluding '\0' */ + char *z; /* String or BLOB value */ + /* ShallowCopy only needs to copy the information above */ + char *zMalloc; /* Space to hold MEM_Str or MEM_Blob if szMalloc>0 */ + int szMalloc; /* Size of the zMalloc allocation */ + u32 uTemp; /* Transient storage for serial_type in OP_MakeRecord */ + Btree *pBtree; /* The associated database connection */ + void (*xDel)(void*);/* Destructor for Mem.z - only valid if MEM_Dyn */ +#ifdef SQLITE_DEBUG + Mem *pScopyFrom; /* This Mem is a shallow copy of pScopyFrom */ + void *pFiller; /* So that sizeof(Mem) is a multiple of 8 */ +#endif +}; + +/* +** Values that may be OR'd together to form the second argument of an +** sqlite3BtreeCursorHints() call. +** +** The BTREE_BULKLOAD flag is set on index cursors when the index is going +** to be filled with content that is already in sorted order. +** +** The BTREE_SEEK_EQ flag is set on cursors that will get OP_SeekGE or +** OP_SeekLE opcodes for a range search, but where the range of entries +** selected will all have the same key. In other words, the cursor will +** be used only for equality key searches. +** +*/ +#define BTREE_BULKLOAD 0x00000001 /* Used to full index in sorted order */ +#define BTREE_SEEK_EQ 0x00000002 /* EQ seeks only - no range seeks */ + +int sqlite3BtreeCursor( + Btree*, /* BTree containing table to open */ + int iTable, /* Index of root page */ + int wrFlag, /* 1 for writing. 0 for read-only */ + int N, int X, /* index of N key columns and X extra columns */ + BtCursor **ppCursor /* Space to write cursor pointer */ +); +int sqlite3BtreeCursorSize(void); + +int sqlite3BtreeCloseCursor(BtCursor*); +void sqlite3BtreeInitUnpackedRecord( + UnpackedRecord *pUnKey, + BtCursor* pCur, + int nField, + int default_rc, + Mem* pMem); +int sqlite3BtreeMovetoUnpacked( + BtCursor*, + UnpackedRecord *pUnKey, + i64 intKey, + int bias, + int *pRes +); +int sqlite3BtreeCursorHasMoved(BtCursor*); +int sqlite3BtreeCursorRestore(BtCursor*, int*); +int sqlite3BtreeDelete(BtCursor*, int); +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*, u32 *pAmt); +const void *sqlite3BtreeDataFetch(BtCursor*, u32 *pAmt); +int sqlite3BtreeDataSize(BtCursor*, u32 *pSize); +int sqlite3BtreeData(BtCursor*, u32 offset, u32 amt, void*); + +char *sqlite3BtreeIntegrityCheck(Btree*, int *aRoot, int nRoot, int, int*); +struct Pager *sqlite3BtreePager(Btree*); + +int sqlite3BtreePutData(BtCursor*, u32 offset, u32 amt, void*); +void sqlite3BtreeIncrblobCursor(BtCursor *); +void sqlite3BtreeClearCursor(BtCursor *); +int sqlite3BtreeSetVersion(Btree *pBt, int iVersion); +void sqlite3BtreeCursorHints(BtCursor *, unsigned int mask); +#ifdef SQLITE_DEBUG +int sqlite3BtreeCursorHasHint(BtCursor*, unsigned int mask); +#endif +int sqlite3BtreeIsReadonly(Btree *pBt); + +#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*); +#else +# define sqlite3BtreeEnter(X) +#endif + +#if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE + int sqlite3BtreeSharable(Btree*); + void sqlite3BtreeLeave(Btree*); + void sqlite3BtreeEnterCursor(BtCursor*); + void sqlite3BtreeLeaveCursor(BtCursor*); +#else + +# define sqlite3BtreeSharable(X) 0 +# define sqlite3BtreeLeave(X) +# define sqlite3BtreeEnterCursor(X) +# define sqlite3BtreeLeaveCursor(X) +#endif + +u32 sqlite3BtreeSerialType(Mem *pMem, int file_format); +u32 sqlite3BtreeSerialTypeLen(u32); +u32 sqlite3BtreeSerialGet(const unsigned char*, u32, Mem *); +u32 sqlite3BtreeSerialPut(u8*, Mem*, u32); + +/* +** Routines to read and write variable-length integers. These used to +** be defined locally, but now we use the varint routines in the util.c +** file. +*/ +int sqlite3BtreePutVarint(unsigned char*, u64); +u8 sqlite3BtreeGetVarint(const unsigned char *, u64 *); +u8 sqlite3BtreeGetVarint32(const unsigned char *, u32 *); +int sqlite3BtreeVarintLen(u64 v); + +/* +** The common case is for a varint to be a single byte. They following +** macros handle the common case without a procedure call, but then call +** the procedure for larger varints. +*/ +#define getVarint32(A,B) \ + (u8)((*(A)<(u8)0x80)?((B)=(u32)*(A)),1:sqlite3BtreeGetVarint32((A),(u32 *)&(B))) +#define putVarint32(A,B) \ + (u8)(((u32)(B)<(u32)0x80)?(*(A)=(unsigned char)(B)),1:\ + sqlite3BtreePutVarint((A),(B))) +#define getVarint sqlite3BtreeGetVarint +#define putVarint sqlite3BtreePutVarint + + +int sqlite3BtreeIdxRowid(Btree*, BtCursor*, i64*); + +int sqlite3BtreeRecordCompare(int,const void*,UnpackedRecord*); + +const char *sqlite3BtreeErrName(int rc); + +#endif /* _BTREE_H_ */ |