/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
-** version 3.6.10. By combining all the individual C code files into this
+** version 3.6.11. By combining all the individual C code files into this
** single large file, the entire code can be compiled as a one translation
** unit. This allows many compilers to do optimizations that would not be
** possible if the files were compiled separately. Performance improvements
** programs, you need this file and the "sqlite3.h" header file that defines
** the programming interface to the SQLite library. (If you do not have
** the "sqlite3.h" header file at hand, you will find a copy in the first
-** 6736 lines past this header comment.) Additional code files may be
+** 6938 lines past this header comment.) Additional code files may be
** needed if you want a wrapper to interface SQLite with your choice of
** programming language. The code for the "sqlite3" command-line shell
** is also in a separate file. This file contains only code for the core
** SQLite library.
**
-** This amalgamation was generated on 2009-01-15 16:03:22 UTC.
+** This amalgamation was generated on 2009-02-17 21:53:46 UTC.
*/
#define SQLITE_CORE 1
#define SQLITE_AMALGAMATION 1
** with the value (X*1000000 + Y*1000 + Z) where X, Y, and Z
** are the major version, minor version, and release number.
*/
-#define SQLITE_VERSION "3.6.10"
-#define SQLITE_VERSION_NUMBER 3006010
+#define SQLITE_VERSION "3.6.11"
+#define SQLITE_VERSION_NUMBER 3006011
/*
** CAPI3REF: Run-Time Library Version Numbers {H10020} <S60100>
** new limit for that construct. The function returns the old limit.
**
** If the new limit is a negative number, the limit is unchanged.
-** For the limit category of SQLITE_LIMIT_XYZ there is a hard upper
-** bound set by a compile-time C preprocessor macro named SQLITE_MAX_XYZ.
+** For the limit category of SQLITE_LIMIT_XYZ there is a
+** [limits | hard upper bound]
+** set by a compile-time C preprocessor macro named
+** [limits | SQLITE_MAX_XYZ].
** (The "_LIMIT_" in the name is changed to "_MAX_".)
** Attempts to increase a limit above its hard upper bound are
** silently truncated to the hard upper limit.
** Run time limits are intended for use in applications that manage
** both their own internal database and also databases that are controlled
** by untrusted external sources. An example application might be a
-** webbrowser that has its own databases for storing history and
+** web browser that has its own databases for storing history and
** separate databases controlled by JavaScript applications downloaded
** off the Internet. The internal databases can be given the
** large, default limits. Databases managed by external sources can
** CAPI3REF: Run-Time Limit Categories {H12790} <H12760>
** KEYWORDS: {limit category} {limit categories}
**
-** These constants define various aspects of a [database connection]
-** that can be limited in size by calls to [sqlite3_limit()].
-** The meanings of the various limits are as follows:
+** These constants define various performance limits
+** that can be lowered at run-time using [sqlite3_limit()].
+** The synopsis of the meanings of the various limits is shown below.
+** Additional information is available at [limits | Limits in SQLite].
**
** <dl>
** <dt>SQLITE_LIMIT_LENGTH</dt>
**
** <dt>SQLITE_LIMIT_COLUMN</dt>
** <dd>The maximum number of columns in a table definition or in the
-** result set of a SELECT or the maximum number of columns in an index
+** result set of a [SELECT] or the maximum number of columns in an index
** or in an ORDER BY or GROUP BY clause.</dd>
**
** <dt>SQLITE_LIMIT_EXPR_DEPTH</dt>
** <dd>The maximum number of arguments on a function.</dd>
**
** <dt>SQLITE_LIMIT_ATTACHED</dt>
-** <dd>The maximum number of attached databases.</dd>
+** <dd>The maximum number of [ATTACH | attached databases].</dd>
**
** <dt>SQLITE_LIMIT_LIKE_PATTERN_LENGTH</dt>
-** <dd>The maximum length of the pattern argument to the LIKE or
-** GLOB operators.</dd>
+** <dd>The maximum length of the pattern argument to the [LIKE] or
+** [GLOB] operators.</dd>
**
** <dt>SQLITE_LIMIT_VARIABLE_NUMBER</dt>
** <dd>The maximum number of variables in an SQL statement that can
** KEYWORDS: {SQL parameter} {SQL parameters} {parameter binding}
**
** In the SQL strings input to [sqlite3_prepare_v2()] and its variants,
-** literals may be replaced by a parameter in one of these forms:
+** literals may be replaced by a [parameter] in one of these forms:
**
** <ul>
** <li> ?
** CAPI3REF: Find The Database Handle Of A Prepared Statement {H13120} <S60600>
**
** The sqlite3_db_handle interface returns the [database connection] handle
-** to which a [prepared statement] belongs. The database handle returned by
-** sqlite3_db_handle is the same database handle that was the first argument
+** to which a [prepared statement] belongs. The [database connection]
+** returned by sqlite3_db_handle is the same [database connection] that was the first argument
** to the [sqlite3_prepare_v2()] call (or its variants) that was used to
** create the statement in the first place.
**
** to the same database. Sharing is enabled if the argument is true
** and disabled if the argument is false.
**
-** Cache sharing is enabled and disabled for an entire process. {END}
+** Cache sharing is enabled and disabled for an entire process.
** This is a change as of SQLite version 3.5.0. In prior versions of SQLite,
** sharing was enabled or disabled for each thread separately.
**
** future releases of SQLite. Applications that care about shared
** cache setting should set it explicitly.
**
+** See Also: [SQLite Shared-Cache Mode]
+**
** INVARIANTS:
**
** {H10331} A successful invocation of [sqlite3_enable_shared_cache(B)]
#define SQLITE_TESTCTRL_BITVEC_TEST 8
#define SQLITE_TESTCTRL_FAULT_INSTALL 9
#define SQLITE_TESTCTRL_BENIGN_MALLOC_HOOKS 10
+#define SQLITE_TESTCTRL_PENDING_BYTE 11
/*
** CAPI3REF: SQLite Runtime Status {H17200} <S60200>
** in which case SQLite will attempt to unpin one or more
** pages before re-requesting the same page, or it can
** allocate a new page and return a pointer to it. If a new
-** page is allocated, then it must be completely zeroed before
-** it is returned.
+** page is allocated, then the first sizeof(void*) bytes of
+** it (at least) must be zeroed before it is returned.
** <tr><td>2<td>If createFlag is set to 2, then SQLite is not holding any
** pinned pages associated with the specific cache passed
** as the first argument to xFetch() that can be unpinned. The
** cache implementation should attempt to allocate a new
-** cache entry and return a pointer to it. Again, the new
-** page should be zeroed before it is returned. If the xFetch()
-** method returns NULL when createFlag==2, SQLite assumes that
-** a memory allocation failed and returns SQLITE_NOMEM to the
-** user.
+** cache entry and return a pointer to it. Again, the first
+** sizeof(void*) bytes of the page should be zeroed before
+** it is returned. If the xFetch() method returns NULL when
+** createFlag==2, SQLite assumes that a memory allocation
+** failed and returns SQLITE_NOMEM to the user.
** </table>
**
** xUnpin() is called by SQLite with a pointer to a currently pinned page
void (*xDestroy)(sqlite3_pcache*);
};
+/*
+** CAPI3REF: Online Backup Object
+** EXPERIMENTAL
+**
+** The sqlite3_backup object records state information about an ongoing
+** online backup operation. The sqlite3_backup object is created by
+** a call to [sqlite3_backup_init()] and is destroyed by a call to
+** [sqlite3_backup_finish()].
+**
+** See Also: [Using the SQLite Online Backup API]
+*/
+typedef struct sqlite3_backup sqlite3_backup;
+
+/*
+** CAPI3REF: Online Backup API.
+** EXPERIMENTAL
+**
+** This API is used to overwrite the contents of one database with that
+** of another. It is useful either for creating backups of databases or
+** for copying in-memory databases to or from persistent files.
+**
+** See Also: [Using the SQLite Online Backup API]
+**
+** Exclusive access is required to the destination database for the
+** duration of the operation. However the source database is only
+** read-locked while it is actually being read, it is not locked
+** continuously for the entire operation. Thus, the backup may be
+** performed on a live database without preventing other users from
+** writing to the database for an extended period of time.
+**
+** To perform a backup operation:
+** <ol>
+** <li><b>sqlite3_backup_init()</b> is called once to initialize the
+** backup,
+** <li><b>sqlite3_backup_step()</b> is called one or more times to transfer
+** the data between the two databases, and finally
+** <li><b>sqlite3_backup_finish()</b> is called to release all resources
+** associated with the backup operation.
+** </ol>
+** There should be exactly one call to sqlite3_backup_finish() for each
+** successful call to sqlite3_backup_init().
+**
+** <b>sqlite3_backup_init()</b>
+**
+** The first two arguments passed to [sqlite3_backup_init()] are the database
+** handle associated with the destination database and the database name
+** used to attach the destination database to the handle. The database name
+** is "main" for the main database, "temp" for the temporary database, or
+** the name specified as part of the [ATTACH] statement if the destination is
+** an attached database. The third and fourth arguments passed to
+** sqlite3_backup_init() identify the [database connection]
+** and database name used
+** to access the source database. The values passed for the source and
+** destination [database connection] parameters must not be the same.
+**
+** If an error occurs within sqlite3_backup_init(), then NULL is returned
+** and an error code and error message written into the [database connection]
+** passed as the first argument. They may be retrieved using the
+** [sqlite3_errcode()], [sqlite3_errmsg()], and [sqlite3_errmsg16()] functions.
+** Otherwise, if successful, a pointer to an [sqlite3_backup] object is
+** returned. This pointer may be used with the sqlite3_backup_step() and
+** sqlite3_backup_finish() functions to perform the specified backup
+** operation.
+**
+** <b>sqlite3_backup_step()</b>
+**
+** Function [sqlite3_backup_step()] is used to copy up to nPage pages between
+** the source and destination databases, where nPage is the value of the
+** second parameter passed to sqlite3_backup_step(). If nPage is a negative
+** value, all remaining source pages are copied. If the required pages are
+** succesfully copied, but there are still more pages to copy before the
+** backup is complete, it returns [SQLITE_OK]. If no error occured and there
+** are no more pages to copy, then [SQLITE_DONE] is returned. If an error
+** occurs, then an SQLite error code is returned. As well as [SQLITE_OK] and
+** [SQLITE_DONE], a call to sqlite3_backup_step() may return [SQLITE_READONLY],
+** [SQLITE_NOMEM], [SQLITE_BUSY], [SQLITE_LOCKED], or an
+** [SQLITE_IOERR_ACCESS | SQLITE_IOERR_XXX] extended error code.
+**
+** As well as the case where the destination database file was opened for
+** read-only access, sqlite3_backup_step() may return [SQLITE_READONLY] if
+** the destination is an in-memory database with a different page size
+** from the source database.
+**
+** If sqlite3_backup_step() cannot obtain a required file-system lock, then
+** the [sqlite3_busy_handler | busy-handler function]
+** is invoked (if one is specified). If the
+** busy-handler returns non-zero before the lock is available, then
+** [SQLITE_BUSY] is returned to the caller. In this case the call to
+** sqlite3_backup_step() can be retried later. If the source
+** [database connection]
+** is being used to write to the source database when sqlite3_backup_step()
+** is called, then [SQLITE_LOCKED] is returned immediately. Again, in this
+** case the call to sqlite3_backup_step() can be retried later on. If
+** [SQLITE_IOERR_ACCESS | SQLITE_IOERR_XXX], [SQLITE_NOMEM], or
+** [SQLITE_READONLY] is returned, then
+** there is no point in retrying the call to sqlite3_backup_step(). These
+** errors are considered fatal. At this point the application must accept
+** that the backup operation has failed and pass the backup operation handle
+** to the sqlite3_backup_finish() to release associated resources.
+**
+** Following the first call to sqlite3_backup_step(), an exclusive lock is
+** obtained on the destination file. It is not released until either
+** sqlite3_backup_finish() is called or the backup operation is complete
+** and sqlite3_backup_step() returns [SQLITE_DONE]. Additionally, each time
+** a call to sqlite3_backup_step() is made a [shared lock] is obtained on
+** the source database file. This lock is released before the
+** sqlite3_backup_step() call returns. Because the source database is not
+** locked between calls to sqlite3_backup_step(), it may be modified mid-way
+** through the backup procedure. If the source database is modified by an
+** external process or via a database connection other than the one being
+** used by the backup operation, then the backup will be transparently
+** restarted by the next call to sqlite3_backup_step(). If the source
+** database is modified by the using the same database connection as is used
+** by the backup operation, then the backup database is transparently
+** updated at the same time.
+**
+** <b>sqlite3_backup_finish()</b>
+**
+** Once sqlite3_backup_step() has returned [SQLITE_DONE], or when the
+** application wishes to abandon the backup operation, the [sqlite3_backup]
+** object should be passed to sqlite3_backup_finish(). This releases all
+** resources associated with the backup operation. If sqlite3_backup_step()
+** has not yet returned [SQLITE_DONE], then any active write-transaction on the
+** destination database is rolled back. The [sqlite3_backup] object is invalid
+** and may not be used following a call to sqlite3_backup_finish().
+**
+** The value returned by sqlite3_backup_finish is [SQLITE_OK] if no error
+** occurred, regardless or whether or not sqlite3_backup_step() was called
+** a sufficient number of times to complete the backup operation. Or, if
+** an out-of-memory condition or IO error occured during a call to
+** sqlite3_backup_step() then [SQLITE_NOMEM] or an
+** [SQLITE_IOERR_ACCESS | SQLITE_IOERR_XXX] error code
+** is returned. In this case the error code and an error message are
+** written to the destination [database connection].
+**
+** A return of [SQLITE_BUSY] or [SQLITE_LOCKED] from sqlite3_backup_step() is
+** not a permanent error and does not affect the return value of
+** sqlite3_backup_finish().
+**
+** <b>sqlite3_backup_remaining(), sqlite3_backup_pagecount()</b>
+**
+** Each call to sqlite3_backup_step() sets two values stored internally
+** by an [sqlite3_backup] object. The number of pages still to be backed
+** up, which may be queried by sqlite3_backup_remaining(), and the total
+** number of pages in the source database file, which may be queried by
+** sqlite3_backup_pagecount().
+**
+** The values returned by these functions are only updated by
+** sqlite3_backup_step(). If the source database is modified during a backup
+** operation, then the values are not updated to account for any extra
+** pages that need to be updated or the size of the source database file
+** changing.
+**
+** <b>Concurrent Usage of Database Handles</b>
+**
+** The source [database connection] may be used by the application for other
+** purposes while a backup operation is underway or being initialized.
+** If SQLite is compiled and configured to support threadsafe database
+** connections, then the source database connection may be used concurrently
+** from within other threads.
+**
+** However, the application must guarantee that the destination database
+** connection handle is not passed to any other API (by any thread) after
+** sqlite3_backup_init() is called and before the corresponding call to
+** sqlite3_backup_finish(). Unfortunately SQLite does not currently check
+** for this, if the application does use the destination [database connection]
+** for some other purpose during a backup operation, things may appear to
+** work correctly but in fact be subtly malfunctioning. Use of the
+** destination database connection while a backup is in progress might
+** also cause a mutex deadlock.
+**
+** Furthermore, if running in [shared cache mode], the application must
+** guarantee that the shared cache used by the destination database
+** is not accessed while the backup is running. In practice this means
+** that the application must guarantee that the file-system file being
+** backed up to is not accessed by any connection within the process,
+** not just the specific connection that was passed to sqlite3_backup_init().
+**
+** The [sqlite3_backup] object itself is partially threadsafe. Multiple
+** threads may safely make multiple concurrent calls to sqlite3_backup_step().
+** However, the sqlite3_backup_remaining() and sqlite3_backup_pagecount()
+** APIs are not strictly speaking threadsafe. If they are invoked at the
+** same time as another thread is invoking sqlite3_backup_step() it is
+** possible that they return invalid values.
+*/
+SQLITE_API sqlite3_backup *sqlite3_backup_init(
+ sqlite3 *pDest, /* Destination database handle */
+ const char *zDestName, /* Destination database name */
+ sqlite3 *pSource, /* Source database handle */
+ const char *zSourceName /* Source database name */
+);
+SQLITE_API int sqlite3_backup_step(sqlite3_backup *p, int nPage);
+SQLITE_API int sqlite3_backup_finish(sqlite3_backup *p);
+SQLITE_API int sqlite3_backup_remaining(sqlite3_backup *p);
+SQLITE_API int sqlite3_backup_pagecount(sqlite3_backup *p);
+
/*
** Undo the hack that converts floating point types to integer for
** builds on processors without floating point support.
#define TK_ASC 30
#define TK_ATTACH 31
#define TK_BEFORE 32
-#define TK_CASCADE 33
-#define TK_CAST 34
-#define TK_CONFLICT 35
-#define TK_DATABASE 36
-#define TK_DESC 37
-#define TK_DETACH 38
-#define TK_EACH 39
-#define TK_FAIL 40
-#define TK_FOR 41
-#define TK_IGNORE 42
-#define TK_INITIALLY 43
-#define TK_INSTEAD 44
-#define TK_LIKE_KW 45
-#define TK_MATCH 46
-#define TK_KEY 47
-#define TK_OF 48
-#define TK_OFFSET 49
-#define TK_PRAGMA 50
-#define TK_RAISE 51
-#define TK_REPLACE 52
-#define TK_RESTRICT 53
-#define TK_ROW 54
-#define TK_TRIGGER 55
-#define TK_VACUUM 56
-#define TK_VIEW 57
-#define TK_VIRTUAL 58
-#define TK_REINDEX 59
-#define TK_RENAME 60
-#define TK_CTIME_KW 61
-#define TK_ANY 62
-#define TK_OR 63
-#define TK_AND 64
-#define TK_IS 65
-#define TK_BETWEEN 66
-#define TK_IN 67
-#define TK_ISNULL 68
-#define TK_NOTNULL 69
-#define TK_NE 70
-#define TK_EQ 71
-#define TK_GT 72
-#define TK_LE 73
-#define TK_LT 74
-#define TK_GE 75
-#define TK_ESCAPE 76
-#define TK_BITAND 77
-#define TK_BITOR 78
-#define TK_LSHIFT 79
-#define TK_RSHIFT 80
-#define TK_PLUS 81
-#define TK_MINUS 82
-#define TK_STAR 83
-#define TK_SLASH 84
-#define TK_REM 85
-#define TK_CONCAT 86
-#define TK_COLLATE 87
-#define TK_UMINUS 88
-#define TK_UPLUS 89
-#define TK_BITNOT 90
-#define TK_STRING 91
-#define TK_JOIN_KW 92
-#define TK_CONSTRAINT 93
-#define TK_DEFAULT 94
-#define TK_NULL 95
-#define TK_PRIMARY 96
-#define TK_UNIQUE 97
-#define TK_CHECK 98
-#define TK_REFERENCES 99
-#define TK_AUTOINCR 100
-#define TK_ON 101
-#define TK_DELETE 102
-#define TK_UPDATE 103
-#define TK_INSERT 104
-#define TK_SET 105
-#define TK_DEFERRABLE 106
-#define TK_FOREIGN 107
-#define TK_DROP 108
-#define TK_UNION 109
-#define TK_ALL 110
-#define TK_EXCEPT 111
-#define TK_INTERSECT 112
-#define TK_SELECT 113
-#define TK_DISTINCT 114
-#define TK_DOT 115
-#define TK_FROM 116
-#define TK_JOIN 117
-#define TK_INDEXED 118
-#define TK_BY 119
-#define TK_USING 120
-#define TK_ORDER 121
-#define TK_GROUP 122
-#define TK_HAVING 123
-#define TK_LIMIT 124
-#define TK_WHERE 125
-#define TK_INTO 126
-#define TK_VALUES 127
-#define TK_INTEGER 128
-#define TK_FLOAT 129
-#define TK_BLOB 130
-#define TK_REGISTER 131
-#define TK_VARIABLE 132
-#define TK_CASE 133
-#define TK_WHEN 134
-#define TK_THEN 135
-#define TK_ELSE 136
-#define TK_INDEX 137
-#define TK_ALTER 138
-#define TK_ADD 139
-#define TK_COLUMNKW 140
+#define TK_BY 33
+#define TK_CASCADE 34
+#define TK_CAST 35
+#define TK_COLUMNKW 36
+#define TK_CONFLICT 37
+#define TK_DATABASE 38
+#define TK_DESC 39
+#define TK_DETACH 40
+#define TK_EACH 41
+#define TK_FAIL 42
+#define TK_FOR 43
+#define TK_IGNORE 44
+#define TK_INITIALLY 45
+#define TK_INSTEAD 46
+#define TK_LIKE_KW 47
+#define TK_MATCH 48
+#define TK_KEY 49
+#define TK_OF 50
+#define TK_OFFSET 51
+#define TK_PRAGMA 52
+#define TK_RAISE 53
+#define TK_REPLACE 54
+#define TK_RESTRICT 55
+#define TK_ROW 56
+#define TK_TRIGGER 57
+#define TK_VACUUM 58
+#define TK_VIEW 59
+#define TK_VIRTUAL 60
+#define TK_REINDEX 61
+#define TK_RENAME 62
+#define TK_CTIME_KW 63
+#define TK_ANY 64
+#define TK_OR 65
+#define TK_AND 66
+#define TK_IS 67
+#define TK_BETWEEN 68
+#define TK_IN 69
+#define TK_ISNULL 70
+#define TK_NOTNULL 71
+#define TK_NE 72
+#define TK_EQ 73
+#define TK_GT 74
+#define TK_LE 75
+#define TK_LT 76
+#define TK_GE 77
+#define TK_ESCAPE 78
+#define TK_BITAND 79
+#define TK_BITOR 80
+#define TK_LSHIFT 81
+#define TK_RSHIFT 82
+#define TK_PLUS 83
+#define TK_MINUS 84
+#define TK_STAR 85
+#define TK_SLASH 86
+#define TK_REM 87
+#define TK_CONCAT 88
+#define TK_COLLATE 89
+#define TK_UMINUS 90
+#define TK_UPLUS 91
+#define TK_BITNOT 92
+#define TK_STRING 93
+#define TK_JOIN_KW 94
+#define TK_CONSTRAINT 95
+#define TK_DEFAULT 96
+#define TK_NULL 97
+#define TK_PRIMARY 98
+#define TK_UNIQUE 99
+#define TK_CHECK 100
+#define TK_REFERENCES 101
+#define TK_AUTOINCR 102
+#define TK_ON 103
+#define TK_DELETE 104
+#define TK_UPDATE 105
+#define TK_INSERT 106
+#define TK_SET 107
+#define TK_DEFERRABLE 108
+#define TK_FOREIGN 109
+#define TK_DROP 110
+#define TK_UNION 111
+#define TK_ALL 112
+#define TK_EXCEPT 113
+#define TK_INTERSECT 114
+#define TK_SELECT 115
+#define TK_DISTINCT 116
+#define TK_DOT 117
+#define TK_FROM 118
+#define TK_JOIN 119
+#define TK_INDEXED 120
+#define TK_USING 121
+#define TK_ORDER 122
+#define TK_GROUP 123
+#define TK_HAVING 124
+#define TK_LIMIT 125
+#define TK_WHERE 126
+#define TK_INTO 127
+#define TK_VALUES 128
+#define TK_INTEGER 129
+#define TK_FLOAT 130
+#define TK_BLOB 131
+#define TK_REGISTER 132
+#define TK_VARIABLE 133
+#define TK_CASE 134
+#define TK_WHEN 135
+#define TK_THEN 136
+#define TK_ELSE 137
+#define TK_INDEX 138
+#define TK_ALTER 139
+#define TK_ADD 140
#define TK_TO_TEXT 141
#define TK_TO_BLOB 142
#define TK_TO_NUMERIC 143
SQLITE_PRIVATE int sqlite3BtreeIsInTrans(Btree*);
SQLITE_PRIVATE int sqlite3BtreeIsInStmt(Btree*);
SQLITE_PRIVATE int sqlite3BtreeIsInReadTrans(Btree*);
+SQLITE_PRIVATE int sqlite3BtreeIsInBackup(Btree*);
SQLITE_PRIVATE void *sqlite3BtreeSchema(Btree *, int, void(*)(void *));
SQLITE_PRIVATE int sqlite3BtreeSchemaLocked(Btree *);
SQLITE_PRIVATE int sqlite3BtreeLockTable(Btree *, int, u8);
SQLITE_PRIVATE int sqlite3BtreeSavepoint(Btree *, int, int);
SQLITE_PRIVATE const char *sqlite3BtreeGetFilename(Btree *);
-SQLITE_PRIVATE const char *sqlite3BtreeGetDirname(Btree *);
SQLITE_PRIVATE const char *sqlite3BtreeGetJournalname(Btree *);
SQLITE_PRIVATE int sqlite3BtreeCopyFile(Btree *, Btree *);
#define OP_Column 3
#define OP_SetCookie 4
#define OP_Seek 5
-#define OP_Real 129 /* same as TK_FLOAT */
+#define OP_Real 130 /* same as TK_FLOAT */
#define OP_Sequence 6
#define OP_Savepoint 7
-#define OP_Ge 75 /* same as TK_GE */
+#define OP_Ge 77 /* same as TK_GE */
#define OP_RowKey 8
#define OP_SCopy 9
-#define OP_Eq 71 /* same as TK_EQ */
+#define OP_Eq 73 /* same as TK_EQ */
#define OP_OpenWrite 10
-#define OP_NotNull 69 /* same as TK_NOTNULL */
+#define OP_NotNull 71 /* same as TK_NOTNULL */
#define OP_If 11
#define OP_ToInt 144 /* same as TK_TO_INT */
-#define OP_String8 91 /* same as TK_STRING */
+#define OP_String8 93 /* same as TK_STRING */
#define OP_VRowid 12
#define OP_CollSeq 13
#define OP_OpenRead 14
#define OP_Expire 15
#define OP_AutoCommit 16
-#define OP_Gt 72 /* same as TK_GT */
+#define OP_Gt 74 /* same as TK_GT */
#define OP_Pagecount 17
#define OP_IntegrityCk 18
#define OP_Sort 20
#define OP_Trace 22
#define OP_Function 23
#define OP_IfNeg 24
-#define OP_And 64 /* same as TK_AND */
-#define OP_Subtract 82 /* same as TK_MINUS */
+#define OP_And 66 /* same as TK_AND */
+#define OP_Subtract 84 /* same as TK_MINUS */
#define OP_Noop 25
#define OP_Return 26
-#define OP_Remainder 85 /* same as TK_REM */
+#define OP_Remainder 87 /* same as TK_REM */
#define OP_NewRowid 27
-#define OP_Multiply 83 /* same as TK_STAR */
+#define OP_Multiply 85 /* same as TK_STAR */
#define OP_Variable 28
#define OP_String 29
#define OP_RealAffinity 30
#define OP_Statement 44
#define OP_RowData 45
#define OP_MemMax 46
-#define OP_Or 63 /* same as TK_OR */
+#define OP_Or 65 /* same as TK_OR */
#define OP_NotExists 47
#define OP_Gosub 48
-#define OP_Divide 84 /* same as TK_SLASH */
+#define OP_Divide 86 /* same as TK_SLASH */
#define OP_Integer 49
#define OP_ToNumeric 143 /* same as TK_TO_NUMERIC*/
#define OP_Prev 50
#define OP_RowSetRead 51
-#define OP_Concat 86 /* same as TK_CONCAT */
+#define OP_Concat 88 /* same as TK_CONCAT */
#define OP_RowSetAdd 52
-#define OP_BitAnd 77 /* same as TK_BITAND */
+#define OP_BitAnd 79 /* same as TK_BITAND */
#define OP_VColumn 53
#define OP_CreateTable 54
#define OP_Last 55
#define OP_SeekLe 56
-#define OP_IsNull 68 /* same as TK_ISNULL */
+#define OP_IsNull 70 /* same as TK_ISNULL */
#define OP_IncrVacuum 57
#define OP_IdxRowid 58
-#define OP_ShiftRight 80 /* same as TK_RSHIFT */
+#define OP_ShiftRight 82 /* same as TK_RSHIFT */
#define OP_ResetCount 59
#define OP_ContextPush 60
#define OP_Yield 61
#define OP_DropTrigger 62
-#define OP_DropIndex 65
-#define OP_IdxGE 66
+#define OP_DropIndex 63
+#define OP_IdxGE 64
#define OP_IdxDelete 67
-#define OP_Vacuum 76
-#define OP_IfNot 87
-#define OP_DropTable 88
+#define OP_Vacuum 68
+#define OP_IfNot 69
+#define OP_DropTable 78
#define OP_SeekLt 89
-#define OP_MakeRecord 92
+#define OP_MakeRecord 90
#define OP_ToBlob 142 /* same as TK_TO_BLOB */
-#define OP_ResultRow 93
+#define OP_ResultRow 91
#define OP_Delete 94
#define OP_AggFinal 95
#define OP_Compare 96
-#define OP_ShiftLeft 79 /* same as TK_LSHIFT */
+#define OP_ShiftLeft 81 /* same as TK_LSHIFT */
#define OP_Goto 97
#define OP_TableLock 98
#define OP_Clear 99
-#define OP_Le 73 /* same as TK_LE */
+#define OP_Le 75 /* same as TK_LE */
#define OP_VerifyCookie 100
#define OP_AggStep 101
#define OP_ToText 141 /* same as TK_TO_TEXT */
#define OP_SetNumColumns 102
#define OP_Transaction 103
#define OP_VFilter 104
-#define OP_Ne 70 /* same as TK_NE */
+#define OP_Ne 72 /* same as TK_NE */
#define OP_VDestroy 105
#define OP_ContextPop 106
-#define OP_BitOr 78 /* same as TK_BITOR */
+#define OP_BitOr 80 /* same as TK_BITOR */
#define OP_Next 107
#define OP_IdxInsert 108
-#define OP_Lt 74 /* same as TK_LT */
+#define OP_Lt 76 /* same as TK_LT */
#define OP_SeekGe 109
#define OP_Insert 110
#define OP_Destroy 111
#define OP_Null 117
#define OP_Move 118
#define OP_Blob 119
-#define OP_Add 81 /* same as TK_PLUS */
+#define OP_Add 83 /* same as TK_PLUS */
#define OP_Rewind 120
#define OP_SeekGt 121
#define OP_VBegin 122
#define OP_VUpdate 123
#define OP_IfZero 124
-#define OP_BitNot 90 /* same as TK_BITNOT */
+#define OP_BitNot 92 /* same as TK_BITNOT */
#define OP_VCreate 125
#define OP_Found 126
#define OP_IfPos 127
#define OP_NullRow 128
-#define OP_Jump 130
+#define OP_Jump 129
#define OP_Permutation 131
/* The following opcode values are never used */
/* 32 */ 0x00, 0x00, 0x00, 0x02, 0x11, 0x11, 0x02, 0x05,\
/* 40 */ 0x00, 0x02, 0x11, 0x04, 0x00, 0x00, 0x0c, 0x11,\
/* 48 */ 0x01, 0x02, 0x01, 0x21, 0x08, 0x00, 0x02, 0x01,\
-/* 56 */ 0x11, 0x01, 0x02, 0x00, 0x00, 0x04, 0x00, 0x2c,\
-/* 64 */ 0x2c, 0x00, 0x11, 0x00, 0x05, 0x05, 0x15, 0x15,\
-/* 72 */ 0x15, 0x15, 0x15, 0x15, 0x00, 0x2c, 0x2c, 0x2c,\
-/* 80 */ 0x2c, 0x2c, 0x2c, 0x2c, 0x2c, 0x2c, 0x2c, 0x05,\
-/* 88 */ 0x00, 0x11, 0x04, 0x02, 0x00, 0x00, 0x00, 0x00,\
+/* 56 */ 0x11, 0x01, 0x02, 0x00, 0x00, 0x04, 0x00, 0x00,\
+/* 64 */ 0x11, 0x2c, 0x2c, 0x00, 0x00, 0x05, 0x05, 0x05,\
+/* 72 */ 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x00, 0x2c,\
+/* 80 */ 0x2c, 0x2c, 0x2c, 0x2c, 0x2c, 0x2c, 0x2c, 0x2c,\
+/* 88 */ 0x2c, 0x11, 0x00, 0x00, 0x04, 0x02, 0x00, 0x00,\
/* 96 */ 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
/* 104 */ 0x01, 0x00, 0x00, 0x01, 0x08, 0x11, 0x00, 0x02,\
/* 112 */ 0x02, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x02,\
/* 120 */ 0x01, 0x11, 0x00, 0x00, 0x05, 0x00, 0x11, 0x05,\
-/* 128 */ 0x00, 0x02, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,\
+/* 128 */ 0x00, 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00,\
/* 136 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x04, 0x04,\
/* 144 */ 0x04, 0x04,}
#define _PAGER_H_
/*
-** 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".
+** Default maximum size for persistent journal files. A negative
+** value means no limit. This value may be overridden using the
+** sqlite3PagerJournalSizeLimit() API. See also "PRAGMA journal_size_limit".
*/
#ifndef SQLITE_DEFAULT_JOURNAL_SIZE_LIMIT
#define SQLITE_DEFAULT_JOURNAL_SIZE_LIMIT -1
*/
typedef struct PgHdr DbPage;
+/*
+** Page number PAGER_MJ_PGNO is never used in an SQLite database (it is
+** reserved for working around a windows/posix incompatibility). It is
+** used in the journal to signify that the remainder of the journal file
+** is devoted to storing a master journal name - there are no more pages to
+** roll back. See comments for function writeMasterJournal() in pager.c
+** for details.
+*/
+#define PAGER_MJ_PGNO(x) ((Pgno)((PENDING_BYTE/((x)->pageSize))+1))
+
/*
** Allowed values for the flags parameter to sqlite3PagerOpen().
**
-** NOTE: This values must match the corresponding BTREE_ values in btree.h.
+** NOTE: These values must match the corresponding BTREE_ values in btree.h.
*/
#define PAGER_OMIT_JOURNAL 0x0001 /* Do not use a rollback journal */
#define PAGER_NO_READLOCK 0x0002 /* Omit readlocks on readonly files */
#define PAGER_JOURNALMODE_MEMORY 4 /* In-memory journal file */
/*
-** See source code comments for a detailed description of the following
-** routines:
+** The remainder of this file contains the declarations of the functions
+** that make up the Pager sub-system API. See source code comments for
+** a detailed description of each routine.
*/
+
+/* Open and close a Pager connection. */
SQLITE_PRIVATE int sqlite3PagerOpen(sqlite3_vfs *, Pager **ppPager, const char*, int,int,int);
+SQLITE_PRIVATE int sqlite3PagerClose(Pager *pPager);
+SQLITE_PRIVATE int sqlite3PagerReadFileheader(Pager*, int, unsigned char*);
+
+/* Functions used to configure a Pager object. */
SQLITE_PRIVATE void sqlite3PagerSetBusyhandler(Pager*, int(*)(void *), void *);
SQLITE_PRIVATE void sqlite3PagerSetReiniter(Pager*, void(*)(DbPage*));
SQLITE_PRIVATE int sqlite3PagerSetPagesize(Pager*, u16*);
SQLITE_PRIVATE int sqlite3PagerMaxPageCount(Pager*, int);
-SQLITE_PRIVATE int sqlite3PagerReadFileheader(Pager*, int, unsigned char*);
SQLITE_PRIVATE void sqlite3PagerSetCachesize(Pager*, int);
-SQLITE_PRIVATE int sqlite3PagerClose(Pager *pPager);
+SQLITE_PRIVATE void sqlite3PagerSetSafetyLevel(Pager*,int,int);
+SQLITE_PRIVATE int sqlite3PagerLockingMode(Pager *, int);
+SQLITE_PRIVATE int sqlite3PagerJournalMode(Pager *, int);
+SQLITE_PRIVATE i64 sqlite3PagerJournalSizeLimit(Pager *, i64);
+sqlite3_backup **sqlite3PagerBackupPtr(Pager*);
+
+/* Functions used to obtain and release page references. */
SQLITE_PRIVATE int sqlite3PagerAcquire(Pager *pPager, Pgno pgno, DbPage **ppPage, int clrFlag);
#define sqlite3PagerGet(A,B,C) sqlite3PagerAcquire(A,B,C,0)
SQLITE_PRIVATE DbPage *sqlite3PagerLookup(Pager *pPager, Pgno pgno);
-SQLITE_PRIVATE int sqlite3PagerPageRefcount(DbPage*);
-SQLITE_PRIVATE int sqlite3PagerRef(DbPage*);
-SQLITE_PRIVATE int sqlite3PagerUnref(DbPage*);
+SQLITE_PRIVATE void sqlite3PagerRef(DbPage*);
+SQLITE_PRIVATE void sqlite3PagerUnref(DbPage*);
+
+/* Operations on page references. */
SQLITE_PRIVATE int sqlite3PagerWrite(DbPage*);
+SQLITE_PRIVATE void sqlite3PagerDontWrite(DbPage*);
+SQLITE_PRIVATE int sqlite3PagerMovepage(Pager*,DbPage*,Pgno,int);
+SQLITE_PRIVATE int sqlite3PagerPageRefcount(DbPage*);
+SQLITE_PRIVATE void *sqlite3PagerGetData(DbPage *);
+SQLITE_PRIVATE void *sqlite3PagerGetExtra(DbPage *);
+
+/* Functions used to manage pager transactions and savepoints. */
SQLITE_PRIVATE int sqlite3PagerPagecount(Pager*, int*);
-SQLITE_PRIVATE int sqlite3PagerBegin(DbPage*, int exFlag);
+SQLITE_PRIVATE int sqlite3PagerBegin(Pager*, int exFlag);
SQLITE_PRIVATE int sqlite3PagerCommitPhaseOne(Pager*,const char *zMaster, int);
+SQLITE_PRIVATE int sqlite3PagerSync(Pager *pPager);
SQLITE_PRIVATE int sqlite3PagerCommitPhaseTwo(Pager*);
SQLITE_PRIVATE int sqlite3PagerRollback(Pager*);
+SQLITE_PRIVATE int sqlite3PagerOpenSavepoint(Pager *pPager, int n);
+SQLITE_PRIVATE int sqlite3PagerSavepoint(Pager *pPager, int op, int iSavepoint);
+
+/* Functions used to query pager state and configuration. */
SQLITE_PRIVATE u8 sqlite3PagerIsreadonly(Pager*);
-SQLITE_PRIVATE void sqlite3PagerDontRollback(DbPage*);
-SQLITE_PRIVATE int sqlite3PagerDontWrite(DbPage*);
SQLITE_PRIVATE int sqlite3PagerRefcount(Pager*);
-SQLITE_PRIVATE void sqlite3PagerSetSafetyLevel(Pager*,int,int);
SQLITE_PRIVATE const char *sqlite3PagerFilename(Pager*);
SQLITE_PRIVATE const sqlite3_vfs *sqlite3PagerVfs(Pager*);
SQLITE_PRIVATE sqlite3_file *sqlite3PagerFile(Pager*);
-SQLITE_PRIVATE const char *sqlite3PagerDirname(Pager*);
SQLITE_PRIVATE const char *sqlite3PagerJournalname(Pager*);
SQLITE_PRIVATE int sqlite3PagerNosync(Pager*);
-SQLITE_PRIVATE int sqlite3PagerMovepage(Pager*,DbPage*,Pgno,int);
-SQLITE_PRIVATE void *sqlite3PagerGetData(DbPage *);
-SQLITE_PRIVATE void *sqlite3PagerGetExtra(DbPage *);
-SQLITE_PRIVATE int sqlite3PagerLockingMode(Pager *, int);
-SQLITE_PRIVATE int sqlite3PagerJournalMode(Pager *, int);
-SQLITE_PRIVATE i64 sqlite3PagerJournalSizeLimit(Pager *, i64);
SQLITE_PRIVATE void *sqlite3PagerTempSpace(Pager*);
-SQLITE_PRIVATE int sqlite3PagerSync(Pager *pPager);
+SQLITE_PRIVATE int sqlite3PagerIsMemdb(Pager*);
-SQLITE_PRIVATE int sqlite3PagerOpenSavepoint(Pager *pPager, int n);
-SQLITE_PRIVATE int sqlite3PagerSavepoint(Pager *pPager, int op, int iSavepoint);
-
-#ifndef SQLITE_OMIT_AUTOVACUUM
-SQLITE_PRIVATE void sqlite3PagerTruncateImage(Pager*,Pgno);
-SQLITE_PRIVATE Pgno sqlite3PagerImageSize(Pager *);
-#endif
+/* Functions used to truncate the database file. */
+SQLITE_PRIVATE void sqlite3PagerTruncateImage(Pager*,Pgno);
+/* Used by encryption extensions. */
#ifdef SQLITE_HAS_CODEC
SQLITE_PRIVATE void sqlite3PagerSetCodec(Pager*,void*(*)(void*,void*,Pgno,int),void*);
#endif
+/* Functions to support testing and debugging. */
#if !defined(NDEBUG) || defined(SQLITE_TEST)
SQLITE_PRIVATE Pgno sqlite3PagerPagenumber(DbPage*);
SQLITE_PRIVATE int sqlite3PagerIswriteable(DbPage*);
#endif
-
#ifdef SQLITE_TEST
SQLITE_PRIVATE int *sqlite3PagerStats(Pager*);
SQLITE_PRIVATE void sqlite3PagerRefdump(Pager*);
-SQLITE_PRIVATE int sqlite3PagerIsMemdb(Pager*);
-#endif
-
-#ifdef SQLITE_TEST
-void disable_simulated_io_errors(void);
-void enable_simulated_io_errors(void);
+ void disable_simulated_io_errors(void);
+ void enable_simulated_io_errors(void);
#else
# define disable_simulated_io_errors()
# define enable_simulated_io_errors()
SQLITE_PRIVATE void sqlite3PcacheClearSyncFlags(PCache *);
/* Discard the contents of the cache */
-SQLITE_PRIVATE int sqlite3PcacheClear(PCache*);
+SQLITE_PRIVATE void sqlite3PcacheClear(PCache*);
/* Return the total number of outstanding page references */
SQLITE_PRIVATE int sqlite3PcacheRefCount(PCache*);
** a random byte is selected for a shared lock. The pool of bytes for
** shared locks begins at SHARED_FIRST.
**
-** These #defines are available in sqlite_aux.h so that adaptors for
-** connecting SQLite to other operating systems can use the same byte
-** ranges for locking. In particular, the same locking strategy and
+** The same locking strategy and
** byte ranges are used for Unix. This leaves open the possiblity of having
** clients on win95, winNT, and unix all talking to the same shared file
** and all locking correctly. To do so would require that samba (or whatever
** 1GB boundary.
**
*/
-#ifndef SQLITE_TEST
-#define PENDING_BYTE 0x40000000 /* First byte past the 1GB boundary */
-#else
-SQLITE_API extern unsigned int sqlite3_pending_byte;
-#define PENDING_BYTE sqlite3_pending_byte
-#endif
-
+#define PENDING_BYTE sqlite3PendingByte
#define RESERVED_BYTE (PENDING_BYTE+1)
#define SHARED_FIRST (PENDING_BYTE+2)
#define SHARED_SIZE 510
#ifndef SQLITE_OMIT_LOAD_EXTENSION
SQLITE_PRIVATE void *sqlite3OsDlOpen(sqlite3_vfs *, const char *);
SQLITE_PRIVATE void sqlite3OsDlError(sqlite3_vfs *, int, char *);
-void (*sqlite3OsDlSym(sqlite3_vfs *, void *, const char *))(void);
+SQLITE_PRIVATE void (*sqlite3OsDlSym(sqlite3_vfs *, void *, const char *))(void);
SQLITE_PRIVATE void sqlite3OsDlClose(sqlite3_vfs *, void *);
#endif /* SQLITE_OMIT_LOAD_EXTENSION */
SQLITE_PRIVATE int sqlite3OsRandomness(sqlite3_vfs *, int, char *);
int addrInTop; /* Top of the IN loop */
} *aInLoop; /* Information about each nested IN operator */
} in; /* Used when plan.wsFlags&WHERE_IN_ABLE */
- struct {
- WherePlan *aPlan; /* Plans for each term of the WHERE clause */
- } or; /* Used when plan.wsFlags&WHERE_MULTI_OR */
} u;
/* The following field is really not part of the current level. But
# define SQLITE_CORRUPT_BKPT SQLITE_CORRUPT
#endif
+/*
+** The following macros mimic the standard library functions toupper(),
+** isspace(), isalnum(), isdigit() and isxdigit(), respectively. The
+** sqlite versions only work for ASCII characters, regardless of locale.
+*/
+#ifdef SQLITE_ASCII
+# define sqlite3Toupper(x) ((x)&~(sqlite3CtypeMap[(unsigned char)(x)]&0x20))
+# define sqlite3Isspace(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x01)
+# define sqlite3Isalnum(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x06)
+# define sqlite3Isalpha(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x02)
+# define sqlite3Isdigit(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x04)
+# define sqlite3Isxdigit(x) (sqlite3CtypeMap[(unsigned char)(x)]&0x08)
+# define sqlite3Tolower(x) (sqlite3UpperToLower[(unsigned char)(x)])
+#else
+# include <ctype.h>
+# define sqlite3Toupper(x) toupper((unsigned char)(x))
+# define sqlite3Isspace(x) isspace((unsigned char)(x))
+# define sqlite3Isalnum(x) isalnum((unsigned char)(x))
+# define sqlite3Isalpha(x) isalpha((unsigned char)(x))
+# define sqlite3Isdigit(x) isdigit((unsigned char)(x))
+# define sqlite3Isxdigit(x) isxdigit((unsigned char)(x))
+# define sqlite3Tolower(x) tolower((unsigned char)(x))
+#endif
+
/*
** Internal function prototypes
*/
SQLITE_PRIVATE int sqlite3BitvecSet(Bitvec*, u32);
SQLITE_PRIVATE void sqlite3BitvecClear(Bitvec*, u32);
SQLITE_PRIVATE void sqlite3BitvecDestroy(Bitvec*);
+SQLITE_PRIVATE u32 sqlite3BitvecSize(Bitvec*);
SQLITE_PRIVATE int sqlite3BitvecBuiltinTest(int,int*);
SQLITE_PRIVATE RowSet *sqlite3RowSetInit(sqlite3*, void*, unsigned int);
SQLITE_PRIVATE void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8);
#ifndef SQLITE_AMALGAMATION
SQLITE_PRIVATE const unsigned char sqlite3UpperToLower[];
+SQLITE_PRIVATE const unsigned char sqlite3CtypeMap[];
SQLITE_PRIVATE SQLITE_WSD struct Sqlite3Config sqlite3Config;
SQLITE_PRIVATE SQLITE_WSD FuncDefHash sqlite3GlobalFunctions;
+SQLITE_PRIVATE int sqlite3PendingByte;
#endif
SQLITE_PRIVATE void sqlite3RootPageMoved(Db*, int, int);
SQLITE_PRIVATE void sqlite3Reindex(Parse*, Token*, Token*);
SQLITE_PRIVATE void sqlite3Analyze(Parse*, Token*, Token*);
SQLITE_PRIVATE int sqlite3InvokeBusyHandler(BusyHandler*);
SQLITE_PRIVATE int sqlite3FindDb(sqlite3*, Token*);
+SQLITE_PRIVATE int sqlite3FindDbName(sqlite3 *, const char *);
SQLITE_PRIVATE int sqlite3AnalysisLoad(sqlite3*,int iDB);
SQLITE_PRIVATE void sqlite3DefaultRowEst(Index*);
SQLITE_PRIVATE void sqlite3RegisterLikeFunctions(sqlite3*, int);
SQLITE_PRIVATE void sqlite3StrAccumReset(StrAccum*);
SQLITE_PRIVATE void sqlite3SelectDestInit(SelectDest*,int,int);
+SQLITE_PRIVATE void sqlite3BackupRestart(sqlite3_backup *);
+SQLITE_PRIVATE void sqlite3BackupUpdate(sqlite3_backup *, Pgno, const u8 *);
+
/*
** The interface to the LEMON-generated parser
*/
#endif
};
+/*
+** The following 256 byte lookup table is used to support SQLites built-in
+** equivalents to the following standard library functions:
+**
+** isspace() 0x01
+** isalpha() 0x02
+** isdigit() 0x04
+** isalnum() 0x06
+** isxdigit() 0x08
+** toupper() 0x20
+**
+** Bit 0x20 is set if the mapped character requires translation to upper
+** case. i.e. if the character is a lower-case ASCII character.
+** If x is a lower-case ASCII character, then its upper-case equivalent
+** is (x - 0x20). Therefore toupper() can be implemented as:
+**
+** (x & ~(map[x]&0x20))
+**
+** Standard function tolower() is implemented using the sqlite3UpperToLower[]
+** array. tolower() is used more often than toupper() by SQLite.
+**
+** SQLite's versions are identical to the standard versions assuming a
+** locale of "C". They are implemented as macros in sqliteInt.h.
+*/
+#ifdef SQLITE_ASCII
+SQLITE_PRIVATE const unsigned char sqlite3CtypeMap[256] = {
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00..07 ........ */
+ 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, /* 08..0f ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10..17 ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 18..1f ........ */
+ 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 20..27 !"#$%&' */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 28..2f ()*+,-./ */
+ 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, /* 30..37 01234567 */
+ 0x0c, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 38..3f 89:;<=>? */
+
+ 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x02, /* 40..47 @ABCDEFG */
+ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 48..4f HIJKLMNO */
+ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, /* 50..57 PQRSTUVW */
+ 0x02, 0x02, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, /* 58..5f XYZ[\]^_ */
+ 0x00, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x22, /* 60..67 `abcdefg */
+ 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, /* 68..6f hijklmno */
+ 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, /* 70..77 pqrstuvw */
+ 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00, 0x00, /* 78..7f xyz{|}~. */
+
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 80..87 ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 88..8f ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 90..97 ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 98..9f ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* a0..a7 ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* a8..af ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* b0..b7 ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* b8..bf ........ */
+
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* c0..c7 ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* c8..cf ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* d0..d7 ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* d8..df ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* e0..e7 ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* e8..ef ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* f0..f7 ........ */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 /* f8..ff ........ */
+};
+#endif
+
+
+
/*
** The following singleton contains the global configuration for
** the SQLite library.
*/
SQLITE_PRIVATE SQLITE_WSD FuncDefHash sqlite3GlobalFunctions;
+/*
+** The value of the "pending" byte must be 0x40000000 (1 byte past the
+** 1-gibabyte boundary) in a compatible database. SQLite never uses
+** the database page that contains the pending byte. It never attempts
+** to read or write that page. The pending byte page is set assign
+** for use by the VFS layers as space for managing file locks.
+**
+** During testing, it is often desirable to move the pending byte to
+** a different position in the file. This allows code that has to
+** deal with the pending byte to run on files that are much smaller
+** than 1 GiB. The sqlite3_test_control() interface can be used to
+** move the pending byte.
+**
+** IMPORTANT: Changing the pending byte to any value other than
+** 0x40000000 results in an incompatible database file format!
+** Changing the pending byte during operating results in undefined
+** and dileterious behavior.
+*/
+SQLITE_PRIVATE int sqlite3PendingByte = 0x40000000;
+
/************** End of global.c **********************************************/
/************** Begin file status.c ******************************************/
/*
** Willmann-Bell, Inc
** Richmond, Virginia (USA)
*/
-#include <ctype.h>
#include <time.h>
#ifndef SQLITE_OMIT_DATETIME_FUNCS
pVal = va_arg(ap, int*);
val = 0;
while( N-- ){
- if( !isdigit(*(u8*)zDate) ){
+ if( !sqlite3Isdigit(*zDate) ){
goto end_getDigits;
}
val = val*10 + *zDate - '0';
int sgn = 0;
int nHr, nMn;
int c;
- while( isspace(*(u8*)zDate) ){ zDate++; }
+ while( sqlite3Isspace(*zDate) ){ zDate++; }
p->tz = 0;
c = *zDate;
if( c=='-' ){
zDate += 5;
p->tz = sgn*(nMn + nHr*60);
zulu_time:
- while( isspace(*(u8*)zDate) ){ zDate++; }
+ while( sqlite3Isspace(*zDate) ){ zDate++; }
return *zDate!=0;
}
return 1;
}
zDate += 2;
- if( *zDate=='.' && isdigit((u8)zDate[1]) ){
+ if( *zDate=='.' && sqlite3Isdigit(zDate[1]) ){
double rScale = 1.0;
zDate++;
- while( isdigit(*(u8*)zDate) ){
+ while( sqlite3Isdigit(*zDate) ){
ms = ms*10.0 + *zDate - '0';
rScale *= 10.0;
zDate++;
return 1;
}
zDate += 10;
- while( isspace(*(u8*)zDate) || 'T'==*(u8*)zDate ){ zDate++; }
+ while( sqlite3Isspace(*zDate) || 'T'==*(u8*)zDate ){ zDate++; }
if( parseHhMmSs(zDate, p)==0 ){
/* We got the time */
}else if( *zDate==0 ){
case '7':
case '8':
case '9': {
+ double rRounder;
n = getValue(z, &r);
assert( n>=1 );
if( z[n]==':' ){
const char *z2 = z;
DateTime tx;
sqlite3_int64 day;
- if( !isdigit(*(u8*)z2) ) z2++;
+ if( !sqlite3Isdigit(*z2) ) z2++;
memset(&tx, 0, sizeof(tx));
if( parseHhMmSs(z2, &tx) ) break;
computeJD(&tx);
break;
}
z += n;
- while( isspace(*(u8*)z) ) z++;
+ while( sqlite3Isspace(*z) ) z++;
n = sqlite3Strlen30(z);
if( n>10 || n<3 ) break;
if( z[n-1]=='s' ){ z[n-1] = 0; n--; }
computeJD(p);
rc = 0;
+ rRounder = r<0 ? -0.5 : +0.5;
if( n==3 && strcmp(z,"day")==0 ){
- p->iJD += (sqlite3_int64)(r*86400000.0 + 0.5);
+ p->iJD += (sqlite3_int64)(r*86400000.0 + rRounder);
}else if( n==4 && strcmp(z,"hour")==0 ){
- p->iJD += (sqlite3_int64)(r*(86400000.0/24.0) + 0.5);
+ p->iJD += (sqlite3_int64)(r*(86400000.0/24.0) + rRounder);
}else if( n==6 && strcmp(z,"minute")==0 ){
- p->iJD += (sqlite3_int64)(r*(86400000.0/(24.0*60.0)) + 0.5);
+ p->iJD += (sqlite3_int64)(r*(86400000.0/(24.0*60.0)) + rRounder);
}else if( n==6 && strcmp(z,"second")==0 ){
- p->iJD += (sqlite3_int64)(r*(86400000.0/(24.0*60.0*60.0)) + 0.5);
+ p->iJD += (sqlite3_int64)(r*(86400000.0/(24.0*60.0*60.0)) + rRounder);
}else if( n==5 && strcmp(z,"month")==0 ){
int x, y;
computeYMD_HMS(p);
computeJD(p);
y = (int)r;
if( y!=r ){
- p->iJD += (sqlite3_int64)((r - y)*30.0*86400000.0 + 0.5);
+ p->iJD += (sqlite3_int64)((r - y)*30.0*86400000.0 + rRounder);
}
}else if( n==4 && strcmp(z,"year")==0 ){
+ int y = (int)r;
computeYMD_HMS(p);
- p->Y += (int)r;
+ p->Y += y;
p->validJD = 0;
computeJD(p);
+ if( y!=r ){
+ p->iJD += (sqlite3_int64)((r - y)*365.0*86400000.0 + rRounder);
+ }
}else{
rc = 1;
}
i++;
}
}
+ testcase( n==sizeof(zBuf)-1 );
+ testcase( n==sizeof(zBuf) );
+ testcase( n==(u64)db->aLimit[SQLITE_LIMIT_LENGTH]+1 );
+ testcase( n==(u64)db->aLimit[SQLITE_LIMIT_LENGTH] );
if( n<sizeof(zBuf) ){
z = zBuf;
}else if( n>(u64)db->aLimit[SQLITE_LIMIT_LENGTH] ){
double rT;
char zBuf[20];
+ UNUSED_PARAMETER(argc);
+ UNUSED_PARAMETER(argv);
+
db = sqlite3_context_db_handle(context);
sqlite3OsCurrentTime(db->pVfs, &rT);
+#ifndef SQLITE_OMIT_FLOATING_POINT
t = 86400.0*(rT - 2440587.5) + 0.5;
+#else
+ /* without floating point support, rT will have
+ ** already lost fractional day precision.
+ */
+ t = 86400 * (rT - 2440587) - 43200;
+#endif
#ifdef HAVE_GMTIME_R
{
struct tm sNow;
SQLITE_PRIVATE void sqlite3OsDlError(sqlite3_vfs *pVfs, int nByte, char *zBufOut){
pVfs->xDlError(pVfs, nByte, zBufOut);
}
-void (*sqlite3OsDlSym(sqlite3_vfs *pVfs, void *pHdle, const char *zSym))(void){
+SQLITE_PRIVATE void (*sqlite3OsDlSym(sqlite3_vfs *pVfs, void *pHdle, const char *zSym))(void){
return pVfs->xDlSym(pVfs, pHdle, zSym);
}
SQLITE_PRIVATE void sqlite3OsDlClose(sqlite3_vfs *pVfs, void *pHandle){
pInt = (int*)pAllocation;
pU8 = (u8*)pAllocation;
assert( pInt[nReserve/sizeof(int)]==(int)REARGUARD );
- assert( (nReserve-0)<=p->iSize || pU8[nReserve-1]==0x65 );
- assert( (nReserve-1)<=p->iSize || pU8[nReserve-2]==0x65 );
- assert( (nReserve-2)<=p->iSize || pU8[nReserve-3]==0x65 );
+ /* This checks any of the "extra" bytes allocated due
+ ** to rounding up to an 8 byte boundary to ensure
+ ** they haven't been overwritten.
+ */
+ while( nReserve-- > p->iSize ) assert( pU8[nReserve]==0x65 );
return p;
}
*/
static int sqlite3MemInit(void *NotUsed){
UNUSED_PARAMETER(NotUsed);
+ assert( (sizeof(struct MemBlockHdr)&7) == 0 );
if( !sqlite3GlobalConfig.bMemstat ){
/* If memory status is enabled, then the malloc.c wrapper will already
** hold the STATIC_MEM mutex when the routines here are invoked. */
*/
SQLITE_PRIVATE int sqlite3MutexEnd(void){
int rc = SQLITE_OK;
- rc = sqlite3GlobalConfig.mutex.xMutexEnd();
+ if( sqlite3GlobalConfig.mutex.xMutexEnd ){
+ rc = sqlite3GlobalConfig.mutex.xMutexEnd();
+ }
return rc;
}
p->nRef++;
rc = SQLITE_OK;
}
+#else
+ UNUSED_PARAMETER(p);
#endif
return rc;
}
** Deinitialize the memory allocation subsystem.
*/
SQLITE_PRIVATE void sqlite3MallocEnd(void){
- sqlite3GlobalConfig.m.xShutdown(sqlite3GlobalConfig.m.pAppData);
+ if( sqlite3GlobalConfig.m.xShutdown ){
+ sqlite3GlobalConfig.m.xShutdown(sqlite3GlobalConfig.m.pAppData);
+ }
memset(&mem0, 0, sizeof(mem0));
}
*/
SQLITE_PRIVATE void *sqlite3Malloc(int n){
void *p;
- if( n<=0 ){
+ if( n<=0 || NEVER(n>=0x7fffff00) ){
+ /* The NEVER(n>=0x7fffff00) term is added out of paranoia. We want to make
+ ** absolutely sure that there is nothing within SQLite that can cause a
+ ** memory allocation of a number of bytes which is near the maximum signed
+ ** integer value and thus cause an integer overflow inside of the xMalloc()
+ ** implementation. The n>=0x7fffff00 gives us 255 bytes of headroom. The
+ ** test should never be true because SQLITE_MAX_LENGTH should be much
+ ** less than 0x7fffff00 and it should catch large memory allocations
+ ** before they reach this point. */
p = 0;
}else if( sqlite3GlobalConfig.bMemstat ){
sqlite3_mutex_enter(mem0.mutex);
if( pOld==0 ){
return sqlite3Malloc(nBytes);
}
- if( nBytes<=0 ){
+ if( nBytes<=0 || NEVER(nBytes>=0x7fffff00) ){
+ /* The NEVER(...) term is explained in comments on sqlite3Malloc() */
sqlite3_free(pOld);
return 0;
}
SQLITE_PRIVATE int sqlite3VdbeReleaseBuffers(Vdbe *p);
#endif
-#ifndef NDEBUG
-SQLITE_PRIVATE void sqlite3VdbeMemSanity(Mem*);
-#endif
SQLITE_PRIVATE int sqlite3VdbeMemTranslate(Mem*, u8);
#ifdef SQLITE_DEBUG
SQLITE_PRIVATE void sqlite3VdbePrintSql(Vdbe*);
** $Id$
*/
-
/*
** Routine needed to support the testcase() macro.
*/
int incr = (enc==SQLITE_UTF8?1:2);
if( enc==SQLITE_UTF16BE ) z++;
if( *z=='-' || *z=='+' ) z += incr;
- if( !isdigit(*(u8*)z) ){
+ if( !sqlite3Isdigit(*z) ){
return 0;
}
z += incr;
if( realnum ) *realnum = 0;
- while( isdigit(*(u8*)z) ){ z += incr; }
+ while( sqlite3Isdigit(*z) ){ z += incr; }
if( *z=='.' ){
z += incr;
- if( !isdigit(*(u8*)z) ) return 0;
- while( isdigit(*(u8*)z) ){ z += incr; }
+ if( !sqlite3Isdigit(*z) ) return 0;
+ while( sqlite3Isdigit(*z) ){ z += incr; }
if( realnum ) *realnum = 1;
}
if( *z=='e' || *z=='E' ){
z += incr;
if( *z=='+' || *z=='-' ) z += incr;
- if( !isdigit(*(u8*)z) ) return 0;
- while( isdigit(*(u8*)z) ){ z += incr; }
+ if( !sqlite3Isdigit(*z) ) return 0;
+ while( sqlite3Isdigit(*z) ){ z += incr; }
if( realnum ) *realnum = 1;
}
return *z==0;
const char *zBegin = z;
LONGDOUBLE_TYPE v1 = 0.0;
int nSignificant = 0;
- while( isspace(*(u8*)z) ) z++;
+ while( sqlite3Isspace(*z) ) z++;
if( *z=='-' ){
sign = -1;
z++;
while( z[0]=='0' ){
z++;
}
- while( isdigit(*(u8*)z) ){
+ while( sqlite3Isdigit(*z) ){
v1 = v1*10.0 + (*z - '0');
z++;
nSignificant++;
z++;
}
}
- while( isdigit(*(u8*)z) ){
+ while( sqlite3Isdigit(*z) ){
if( nSignificant<18 ){
v1 = v1*10.0 + (*z - '0');
divisor *= 10.0;
}else if( *z=='+' ){
z++;
}
- while( isdigit(*(u8*)z) ){
+ while( sqlite3Isdigit(*z) ){
eval = eval*10 + *z - '0';
z++;
}
int neg;
int i, c;
const char *zStart;
- while( isspace(*(u8*)zNum) ) zNum++;
+ while( sqlite3Isspace(*zNum) ) zNum++;
if( *zNum=='-' ){
neg = 1;
zNum++;
/* 60 */ "ContextPush",
/* 61 */ "Yield",
/* 62 */ "DropTrigger",
- /* 63 */ "Or",
- /* 64 */ "And",
- /* 65 */ "DropIndex",
- /* 66 */ "IdxGE",
+ /* 63 */ "DropIndex",
+ /* 64 */ "IdxGE",
+ /* 65 */ "Or",
+ /* 66 */ "And",
/* 67 */ "IdxDelete",
- /* 68 */ "IsNull",
- /* 69 */ "NotNull",
- /* 70 */ "Ne",
- /* 71 */ "Eq",
- /* 72 */ "Gt",
- /* 73 */ "Le",
- /* 74 */ "Lt",
- /* 75 */ "Ge",
- /* 76 */ "Vacuum",
- /* 77 */ "BitAnd",
- /* 78 */ "BitOr",
- /* 79 */ "ShiftLeft",
- /* 80 */ "ShiftRight",
- /* 81 */ "Add",
- /* 82 */ "Subtract",
- /* 83 */ "Multiply",
- /* 84 */ "Divide",
- /* 85 */ "Remainder",
- /* 86 */ "Concat",
- /* 87 */ "IfNot",
- /* 88 */ "DropTable",
+ /* 68 */ "Vacuum",
+ /* 69 */ "IfNot",
+ /* 70 */ "IsNull",
+ /* 71 */ "NotNull",
+ /* 72 */ "Ne",
+ /* 73 */ "Eq",
+ /* 74 */ "Gt",
+ /* 75 */ "Le",
+ /* 76 */ "Lt",
+ /* 77 */ "Ge",
+ /* 78 */ "DropTable",
+ /* 79 */ "BitAnd",
+ /* 80 */ "BitOr",
+ /* 81 */ "ShiftLeft",
+ /* 82 */ "ShiftRight",
+ /* 83 */ "Add",
+ /* 84 */ "Subtract",
+ /* 85 */ "Multiply",
+ /* 86 */ "Divide",
+ /* 87 */ "Remainder",
+ /* 88 */ "Concat",
/* 89 */ "SeekLt",
- /* 90 */ "BitNot",
- /* 91 */ "String8",
- /* 92 */ "MakeRecord",
- /* 93 */ "ResultRow",
+ /* 90 */ "MakeRecord",
+ /* 91 */ "ResultRow",
+ /* 92 */ "BitNot",
+ /* 93 */ "String8",
/* 94 */ "Delete",
/* 95 */ "AggFinal",
/* 96 */ "Compare",
/* 126 */ "Found",
/* 127 */ "IfPos",
/* 128 */ "NullRow",
- /* 129 */ "Real",
- /* 130 */ "Jump",
+ /* 129 */ "Jump",
+ /* 130 */ "Real",
/* 131 */ "Permutation",
/* 132 */ "NotUsed_132",
/* 133 */ "NotUsed_133",
unsigned char locktype; /* The type of lock held on this fd */
int lastErrno; /* The unix errno from the last I/O error */
void *lockingContext; /* Locking style specific state */
- int openFlags; /* The flags specified at open */
+#if SQLITE_ENABLE_LOCKING_STYLE
+ int openFlags; /* The flags specified at open() */
+#endif
#if SQLITE_THREADSAFE && defined(__linux__)
pthread_t tid; /* The thread that "owns" this unixFile */
#endif
unsigned char transCntrChng; /* True if the transaction counter changed */
unsigned char dbUpdate; /* True if any part of database file changed */
unsigned char inNormalWrite; /* True if in a normal write operation */
+
+ /* If true, that means we are dealing with a database file that has
+ ** a range of locking bytes from PENDING_BYTE through PENDING_BYTE+511
+ ** which should never be read or written. Asserts() will verify this */
+ unsigned char isLockable; /* True if file might be locked */
#endif
#ifdef SQLITE_TEST
/* In test mode, increase the size of this structure a bit so that
return SQLITE_IOERR;
}
+#ifdef __APPLE__
/* On OS X on an msdos filesystem, the inode number is reported
** incorrectly for zero-size files. See ticket #3260. To work
** around this problem (we consider it a bug in OS X, not SQLite)
** the first page of the database, no damage is done.
*/
if( statbuf.st_size==0 ){
- write(fd, "S", 1);
+ rc = write(fd, "S", 1);
+ if( rc!=1 ){
+ return SQLITE_IOERR;
+ }
rc = fstat(fd, &statbuf);
if( rc!=0 ){
pFile->lastErrno = errno;
return SQLITE_IOERR;
}
}
+#endif
memset(&lockKey, 0, sizeof(lockKey));
lockKey.fid.dev = statbuf.st_dev;
/* Otherwise see if some other process holds it.
*/
+#ifndef __DJGPP__
if( !reserved ){
struct flock lock;
lock.l_whence = SEEK_SET;
reserved = 1;
}
}
+#endif
unixLeaveMutex();
OSTRACE4("TEST WR-LOCK %d %d %d\n", pFile->h, rc, reserved);
if( IS_LOCK_ERROR(rc) ){
pFile->lastErrno = tErrno;
}
- goto end_unlock;
+ goto end_unlock;
}
}
lock.l_type = F_UNLCK;
){
int got;
assert( id );
+
+ /* Never read or write any of the bytes in the locking range */
+ assert( ((unixFile*)id)->isLockable==0
+ || offset>=PENDING_BYTE+512
+ || offset+amt<=PENDING_BYTE );
+
got = seekAndRead((unixFile*)id, offset, pBuf, amt);
if( got==amt ){
return SQLITE_OK;
assert( id );
assert( amt>0 );
+ /* Never read or write any of the bytes in the locking range */
+ assert( ((unixFile*)id)->isLockable==0
+ || offset>=PENDING_BYTE+512
+ || offset+amt<=PENDING_BYTE );
+
#ifndef NDEBUG
/* If we are doing a normal write to a database file (as opposed to
** doing a hot-journal rollback or a write to some file other than a
unixFile *pFile = (unixFile*)id;
pFile->dbUpdate = 1; /* The database has been modified */
if( offset<=24 && offset+amt>=27 ){
+ int rc;
char oldCntr[4];
SimulateIOErrorBenign(1);
- seekAndRead(pFile, 24, oldCntr, 4);
+ rc = seekAndRead(pFile, 24, oldCntr, 4);
SimulateIOErrorBenign(0);
- if( memcmp(oldCntr, &((char*)pBuf)[24-offset], 4)!=0 ){
+ if( rc!=4 || memcmp(oldCntr, &((char*)pBuf)[24-offset], 4)!=0 ){
pFile->transCntrChng = 1; /* The transaction counter has changed */
}
}
*pOutFlags = flags;
}
+#ifndef NDEBUG
+ if( (flags & SQLITE_OPEN_MAIN_DB)!=0 ){
+ ((unixFile*)pFile)->isLockable = 1;
+ }
+#endif
+
assert(fd!=0);
if( isOpenDirectory ){
rc = openDirectory(zPath, &dirfd);
HANDLE h; /* Handle for accessing the file */
unsigned char locktype; /* Type of lock currently held on this file */
short sharedLockByte; /* Randomly chosen byte used as a shared lock */
+ DWORD lastErrno; /* The Windows errno from the last I/O error */
#if SQLITE_OS_WINCE
WCHAR *zDeleteOnClose; /* Name of file to delete when closing */
HANDLE hMutex; /* Mutex used to control access to shared lock */
/* Create/open the named mutex */
pFile->hMutex = CreateMutexW(NULL, FALSE, zName);
if (!pFile->hMutex){
+ pFile->lastErrno = GetLastError();
free(zName);
return FALSE;
}
FILE_MAP_READ|FILE_MAP_WRITE, 0, 0, sizeof(winceLock));
/* If mapping failed, close the shared memory handle and erase it */
if (!pFile->shared){
+ pFile->lastErrno = GetLastError();
CloseHandle(pFile->hShared);
pFile->hShared = NULL;
}
DWORD rc;
DWORD got;
winFile *pFile = (winFile*)id;
+ DWORD error;
assert( id!=0 );
SimulateIOError(return SQLITE_IOERR_READ);
OSTRACE3("READ %d lock=%d\n", pFile->h, pFile->locktype);
rc = SetFilePointer(pFile->h, lowerBits, &upperBits, FILE_BEGIN);
- if( rc==INVALID_SET_FILE_POINTER && GetLastError()!=NO_ERROR ){
+ if( rc==INVALID_SET_FILE_POINTER && (error=GetLastError())!=NO_ERROR ){
+ pFile->lastErrno = error;
return SQLITE_FULL;
}
if( !ReadFile(pFile->h, pBuf, amt, &got, 0) ){
+ pFile->lastErrno = GetLastError();
return SQLITE_IOERR_READ;
}
if( got==(DWORD)amt ){
DWORD rc;
DWORD wrote = 0;
winFile *pFile = (winFile*)id;
+ DWORD error;
assert( id!=0 );
SimulateIOError(return SQLITE_IOERR_WRITE);
SimulateDiskfullError(return SQLITE_FULL);
OSTRACE3("WRITE %d lock=%d\n", pFile->h, pFile->locktype);
rc = SetFilePointer(pFile->h, lowerBits, &upperBits, FILE_BEGIN);
- if( rc==INVALID_SET_FILE_POINTER && GetLastError()!=NO_ERROR ){
+ if( rc==INVALID_SET_FILE_POINTER && (error=GetLastError())!=NO_ERROR ){
+ pFile->lastErrno = error;
return SQLITE_FULL;
}
assert( amt>0 );
pBuf = &((char*)pBuf)[wrote];
}
if( !rc || amt>(int)wrote ){
+ pFile->lastErrno = GetLastError();
return SQLITE_FULL;
}
return SQLITE_OK;
LONG upperBits = (LONG)((nByte>>32) & 0x7fffffff);
LONG lowerBits = (LONG)(nByte & 0xffffffff);
winFile *pFile = (winFile*)id;
+ DWORD error = NO_ERROR;
OSTRACE3("TRUNCATE %d %lld\n", pFile->h, nByte);
SimulateIOError(return SQLITE_IOERR_TRUNCATE);
rc = SetFilePointer(pFile->h, lowerBits, &upperBits, FILE_BEGIN);
- if( INVALID_SET_FILE_POINTER != rc ){
+ if( INVALID_SET_FILE_POINTER == rc ){
+ error = GetLastError();
+ }
+ if( error == NO_ERROR ){
/* SetEndOfFile will fail if nByte is negative */
if( SetEndOfFile(pFile->h) ){
return SQLITE_OK;
}
+ error = GetLastError();
}
+ pFile->lastErrno = error;
return SQLITE_IOERR_TRUNCATE;
}
static int winSync(sqlite3_file *id, int flags){
#ifndef SQLITE_NO_SYNC
winFile *pFile = (winFile*)id;
+ OSTRACE3("SYNC %d lock=%d\n", pFile->h, pFile->locktype);
#else
UNUSED_PARAMETER(id);
#endif
- OSTRACE3("SYNC %d lock=%d\n", pFile->h, pFile->locktype);
#ifndef SQLITE_TEST
UNUSED_PARAMETER(flags);
#else
if( FlushFileBuffers(pFile->h) ){
return SQLITE_OK;
}else{
+ pFile->lastErrno = GetLastError();
return SQLITE_IOERR;
}
#endif
static int winFileSize(sqlite3_file *id, sqlite3_int64 *pSize){
winFile *pFile = (winFile*)id;
DWORD upperBits, lowerBits;
+ DWORD error;
SimulateIOError(return SQLITE_IOERR_FSTAT);
lowerBits = GetFileSize(pFile->h, &upperBits);
+ if( (lowerBits == INVALID_FILE_SIZE)
+ && ((error = GetLastError()) != NO_ERROR) )
+ {
+ pFile->lastErrno = error;
+ return SQLITE_IOERR_FSTAT;
+ }
*pSize = (((sqlite3_int64)upperBits)<<32) + lowerBits;
return SQLITE_OK;
}
res = LockFile(pFile->h, SHARED_FIRST+pFile->sharedLockByte, 0, 1, 0);
#endif
}
+ if( res == 0 ){
+ pFile->lastErrno = GetLastError();
+ }
return res;
}
res = UnlockFile(pFile->h, SHARED_FIRST + pFile->sharedLockByte, 0, 1, 0);
#endif
}
+ if( res == 0 ){
+ pFile->lastErrno = GetLastError();
+ }
return res;
}
int newLocktype; /* Set pFile->locktype to this value before exiting */
int gotPendingLock = 0;/* True if we acquired a PENDING lock this time */
winFile *pFile = (winFile*)id;
+ DWORD error = NO_ERROR;
assert( pFile!=0 );
OSTRACE5("LOCK %d %d was %d(%d)\n",
** the PENDING_LOCK byte is temporary.
*/
newLocktype = pFile->locktype;
- if( pFile->locktype==NO_LOCK
- || (locktype==EXCLUSIVE_LOCK && pFile->locktype==RESERVED_LOCK)
+ if( (pFile->locktype==NO_LOCK)
+ || ( (locktype==EXCLUSIVE_LOCK)
+ && (pFile->locktype==RESERVED_LOCK))
){
int cnt = 3;
while( cnt-->0 && (res = LockFile(pFile->h, PENDING_BYTE, 0, 1, 0))==0 ){
Sleep(1);
}
gotPendingLock = res;
+ if( !res ){
+ error = GetLastError();
+ }
}
/* Acquire a shared lock
res = getReadLock(pFile);
if( res ){
newLocktype = SHARED_LOCK;
+ }else{
+ error = GetLastError();
}
}
res = LockFile(pFile->h, RESERVED_BYTE, 0, 1, 0);
if( res ){
newLocktype = RESERVED_LOCK;
+ }else{
+ error = GetLastError();
}
}
if( res ){
newLocktype = EXCLUSIVE_LOCK;
}else{
- OSTRACE2("error-code = %d\n", GetLastError());
+ error = GetLastError();
+ OSTRACE2("error-code = %d\n", error);
getReadLock(pFile);
}
}
}else{
OSTRACE4("LOCK FAILED %d trying for %d but got %d\n", pFile->h,
locktype, newLocktype);
+ pFile->lastErrno = error;
rc = SQLITE_BUSY;
}
pFile->locktype = (u8)newLocktype;
*(int*)pArg = ((winFile*)id)->locktype;
return SQLITE_OK;
}
+ case SQLITE_LAST_ERRNO: {
+ *(int*)pArg = (int)((winFile*)id)->lastErrno;
+ return SQLITE_OK;
+ }
}
return SQLITE_ERROR;
}
memset(pFile, 0, sizeof(*pFile));
pFile->pMethod = &winIoMethod;
pFile->h = h;
+ pFile->lastErrno = NO_ERROR;
#if SQLITE_OS_WINCE
if( (flags & (SQLITE_OPEN_READWRITE|SQLITE_OPEN_MAIN_DB)) ==
(SQLITE_OPEN_READWRITE|SQLITE_OPEN_MAIN_DB)
/* FILETIME structure is a 64-bit value representing the number of
100-nanosecond intervals since January 1, 1601 (= JD 2305813.5).
*/
- double now;
+ sqlite3_int64 timeW, timeF;
#if SQLITE_OS_WINCE
SYSTEMTIME time;
GetSystemTime(&time);
GetSystemTimeAsFileTime( &ft );
#endif
UNUSED_PARAMETER(pVfs);
- now = ((double)ft.dwHighDateTime) * 4294967296.0;
- *prNow = (now + ft.dwLowDateTime)/864000000000.0 + 2305813.5;
+#if defined(_MSC_VER)
+ timeW = (((sqlite3_int64)ft.dwHighDateTime)*4294967296) + ft.dwLowDateTime;
+ timeF = timeW % 864000000000; /* fractional days (100-nanoseconds) */
+ timeW = timeW / 864000000000; /* whole days */
+ timeW = timeW + 2305813; /* add whole days (from 2305813.5) */
+ timeF = timeF + 432000000000; /* add half a day (from 2305813.5) */
+ timeW = timeW + (timeF / 864000000000); /* add whole day if half day made one */
+ timeF = timeF % 864000000000; /* compute new fractional days */
+ *prNow = (double)timeW + ((double)timeF / (double)864000000000);
+#else
+ timeW = (((sqlite3_int64)ft.dwHighDateTime)*4294967296LL) + ft.dwLowDateTime;
+ timeF = timeW % 864000000000LL; /* fractional days (100-nanoseconds) */
+ timeW = timeW / 864000000000LL; /* whole days */
+ timeW = timeW + 2305813; /* add whole days (from 2305813.5) */
+ timeF = timeF + 432000000000LL; /* add half a day (from 2305813.5) */
+ timeW = timeW + (timeF / 864000000000LL); /* add whole day if half day made one */
+ timeF = timeF % 864000000000LL; /* compute new fractional days */
+ *prNow = (double)timeW + ((double)timeF / (double)864000000000LL);
+#endif
#ifdef SQLITE_TEST
if( sqlite3_current_time ){
- *prNow = sqlite3_current_time/86400.0 + 2440587.5;
+ *prNow = ((double)sqlite3_current_time + (double)43200) / (double)86400 + (double)2440587;
}
#endif
return 0;
sqlite3_free(p);
}
+/*
+** Return the value of the iSize parameter specified when Bitvec *p
+** was created.
+*/
+SQLITE_PRIVATE u32 sqlite3BitvecSize(Bitvec *p){
+ return p->iSize;
+}
+
#ifndef SQLITE_OMIT_BUILTIN_TEST
/*
** Let V[] be an array of unsigned characters sufficient to hold
PgHdr *pSynced; /* Last synced page in dirty page list */
int nRef; /* Number of referenced pages */
int nMax; /* Configured cache size */
- int nMin; /* Configured minimum cache size */
int szPage; /* Size of every page in this cache */
int szExtra; /* Size of extra space for each page */
int bPurgeable; /* True if pages are on backing store */
int (*xStress)(void*,PgHdr*); /* Call to try make a page clean */
void *pStress; /* Argument to xStress */
sqlite3_pcache *pCache; /* Pluggable cache module */
- PgHdr *pPage1;
+ PgHdr *pPage1; /* Reference to page 1 */
};
/*
p->xStress = xStress;
p->pStress = pStress;
p->nMax = 100;
- p->nMin = 10;
}
/*
}
if( pPage ){
+ if( !pPage->pData ){
+ memset(pPage, 0, sizeof(PgHdr) + pCache->szExtra);
+ pPage->pExtra = (void*)&pPage[1];
+ pPage->pData = (void *)&((char *)pPage)[sizeof(PgHdr) + pCache->szExtra];
+ pPage->pCache = pCache;
+ pPage->pgno = pgno;
+ }
+ assert( pPage->pCache==pCache );
+ assert( pPage->pgno==pgno );
+ assert( pPage->pExtra==(void *)&pPage[1] );
+
if( 0==pPage->nRef ){
pCache->nRef++;
}
pPage->nRef++;
- pPage->pData = (void*)&pPage[1];
- pPage->pExtra = (void*)&((char*)pPage->pData)[pCache->szPage];
- pPage->pCache = pCache;
- pPage->pgno = pgno;
if( pgno==1 ){
pCache->pPage1 = pPage;
}
/*
** Discard the contents of the cache.
*/
-SQLITE_PRIVATE int sqlite3PcacheClear(PCache *pCache){
+SQLITE_PRIVATE void sqlite3PcacheClear(PCache *pCache){
sqlite3PcacheTruncate(pCache, 0);
- return SQLITE_OK;
}
/*
int nByte = sizeof(PgHdr1) + pCache->szPage;
PgHdr1 *p = (PgHdr1 *)pcache1Alloc(nByte);
if( p ){
- memset(p, 0, nByte);
if( pCache->bPurgeable ){
pcache1.nCurrentPage++;
}
if( pPage ){
unsigned int h = iKey % pCache->nHash;
- memset(pPage, 0, pCache->szPage + sizeof(PgHdr1));
+ *(void **)(PGHDR1_TO_PAGE(pPage)) = 0;
pCache->nPage++;
pPage->iKey = iKey;
pPage->pNext = pCache->apHash[h];
pPage->pCache = pCache;
+ pPage->pLruPrev = 0;
+ pPage->pLruNext = 0;
pCache->apHash[h] = pPage;
}
/*
** A open page cache is an instance of the following structure.
**
-** Pager.errCode may be set to SQLITE_IOERR, SQLITE_CORRUPT, or
-** or SQLITE_FULL. Once one of the first three errors occurs, it persists
-** and is returned as the result of every major pager API call. The
-** SQLITE_FULL return code is slightly different. It persists only until the
-** next successful rollback is performed on the pager cache. Also,
-** SQLITE_FULL does not affect the sqlite3PagerGet() and sqlite3PagerLookup()
-** APIs, they may still be used successfully.
-**
-** Managing the size of the database file in pages is a little complicated.
-** The variable Pager.dbSize contains the number of pages that the database
-** image currently contains. As the database image grows or shrinks this
-** variable is updated. The variable Pager.dbFileSize contains the number
-** of pages in the database file. This may be different from Pager.dbSize
-** if some pages have been appended to the database image but not yet written
-** out from the cache to the actual file on disk. Or if the image has been
-** truncated by an incremental-vacuum operation. The Pager.dbOrigSize variable
-** contains the number of pages in the database image when the current
-** transaction was opened. The contents of all three of these variables is
-** only guaranteed to be correct if the boolean Pager.dbSizeValid is true.
+** errCode
+**
+** Pager.errCode may be set to SQLITE_IOERR, SQLITE_CORRUPT, or
+** or SQLITE_FULL. Once one of the first three errors occurs, it persists
+** and is returned as the result of every major pager API call. The
+** SQLITE_FULL return code is slightly different. It persists only until the
+** next successful rollback is performed on the pager cache. Also,
+** SQLITE_FULL does not affect the sqlite3PagerGet() and sqlite3PagerLookup()
+** APIs, they may still be used successfully.
+**
+** dbSizeValid, dbSize, dbOrigSize, dbFileSize
+**
+** Managing the size of the database file in pages is a little complicated.
+** The variable Pager.dbSize contains the number of pages that the database
+** image currently contains. As the database image grows or shrinks this
+** variable is updated. The variable Pager.dbFileSize contains the number
+** of pages in the database file. This may be different from Pager.dbSize
+** if some pages have been appended to the database image but not yet written
+** out from the cache to the actual file on disk. Or if the image has been
+** truncated by an incremental-vacuum operation. The Pager.dbOrigSize variable
+** contains the number of pages in the database image when the current
+** transaction was opened. The contents of all three of these variables is
+** only guaranteed to be correct if the boolean Pager.dbSizeValid is true.
+**
+** TODO: Under what conditions is dbSizeValid set? Cleared?
+**
+** changeCountDone
+**
+** This boolean variable is used to make sure that the change-counter
+** (the 4-byte header field at byte offset 24 of the database file) is
+** not updated more often than necessary.
+**
+** It is set to true when the change-counter field is updated, which
+** can only happen if an exclusive lock is held on the database file.
+** It is cleared (set to false) whenever an exclusive lock is
+** relinquished on the database file. Each time a transaction is committed,
+** The changeCountDone flag is inspected. If it is true, the work of
+** updating the change-counter is omitted for the current transaction.
+**
+** This mechanism means that when running in exclusive mode, a connection
+** need only update the change-counter once, for the first transaction
+** committed.
+**
+** dbModified
+**
+** The dbModified flag is set whenever a database page is dirtied.
+** It is cleared at the end of each transaction.
+**
+** It is used when committing or otherwise ending a transaction. If
+** the dbModified flag is clear then less work has to be done.
+**
+** journalStarted
+**
+** This flag is set whenever the the main journal is synced.
+**
+** The point of this flag is that it must be set after the
+** first journal header in a journal file has been synced to disk.
+** After this has happened, new pages appended to the database
+** do not need the PGHDR_NEED_SYNC flag set, as they do not need
+** to wait for a journal sync before they can be written out to
+** the database file (see function pager_write()).
+**
+** setMaster
+**
+** This variable is used to ensure that the master journal file name
+** (if any) is only written into the journal file once.
+**
+** When committing a transaction, the master journal file name (if any)
+** may be written into the journal file while the pager is still in
+** PAGER_RESERVED state (see CommitPhaseOne() for the action). It
+** then attempts to upgrade to an exclusive lock. If this attempt
+** fails, then SQLITE_BUSY may be returned to the user and the user
+** may attempt to commit the transaction again later (calling
+** CommitPhaseOne() again). This flag is used to ensure that the
+** master journal name is only written to the journal file the first
+** time CommitPhaseOne() is called.
+**
+** doNotSync
+**
+** This variable is set and cleared by sqlite3PagerWrite().
+**
+** needSync
+**
+** TODO: It might be easier to set this variable in writeJournalHdr()
+** and writeMasterJournal() only. Change its meaning to "unsynced data
+** has been written to the journal".
*/
struct Pager {
sqlite3_vfs *pVfs; /* OS functions to use for IO */
- u8 journalOpen; /* True if journal file descriptors is valid */
- u8 journalStarted; /* True if header of journal is synced */
+ u8 exclusiveMode; /* Boolean. True if locking_mode==EXCLUSIVE */
+ u8 journalMode; /* On of the PAGER_JOURNALMODE_* values */
u8 useJournal; /* Use a rollback journal on this file */
u8 noReadlock; /* Do not bother to obtain readlocks */
u8 noSync; /* Do not sync the journal if true */
u8 fullSync; /* Do extra syncs of the journal for robustness */
u8 sync_flags; /* One of SYNC_NORMAL or SYNC_FULL */
- u8 state; /* PAGER_UNLOCK, _SHARED, _RESERVED, etc. */
u8 tempFile; /* zFilename is a temporary file */
u8 readOnly; /* True for a read-only database */
- u8 needSync; /* True if an fsync() is needed on the journal */
- u8 dirtyCache; /* True if cached pages have changed */
u8 memDb; /* True to inhibit all file I/O */
- u8 setMaster; /* True if a m-j name has been written to jrnl */
- u8 doNotSync; /* Boolean. While true, do not spill the cache */
- u8 exclusiveMode; /* Boolean. True if locking_mode==EXCLUSIVE */
- u8 journalMode; /* On of the PAGER_JOURNALMODE_* values */
+
+ /* The following block contains those class members that are dynamically
+ ** modified during normal operations. The other variables in this structure
+ ** are either constant throughout the lifetime of the pager, or else
+ ** used to store configuration parameters that affect the way the pager
+ ** operates.
+ **
+ ** The 'state' variable is described in more detail along with the
+ ** descriptions of the values it may take - PAGER_UNLOCK etc. Many of the
+ ** other variables in this block are described in the comment directly
+ ** above this class definition.
+ */
+ u8 state; /* PAGER_UNLOCK, _SHARED, _RESERVED, etc. */
u8 dbModified; /* True if there are any changes to the Db */
+ u8 needSync; /* True if an fsync() is needed on the journal */
+ u8 journalStarted; /* True if header of journal is synced */
u8 changeCountDone; /* Set after incrementing the change-counter */
+ u8 setMaster; /* True if a m-j name has been written to jrnl */
+ u8 doNotSync; /* Boolean. While true, do not spill the cache */
u8 dbSizeValid; /* Set when dbSize is correct */
Pgno dbSize; /* Number of pages in the database */
Pgno dbOrigSize; /* dbSize before the current transaction */
Pgno dbFileSize; /* Number of pages in the database file */
- u32 vfsFlags; /* Flags for sqlite3_vfs.xOpen() */
int errCode; /* One of several kinds of errors */
- int nRec; /* Number of pages written to the journal */
+ int nRec; /* Pages journalled since last j-header written */
u32 cksumInit; /* Quasi-random value added to every checksum */
- int stmtNRec; /* Number of records in stmt subjournal */
+ u32 nSubRec; /* Number of records written to sub-journal */
+ Bitvec *pInJournal; /* One bit for each page in the database file */
+ sqlite3_file *fd; /* File descriptor for database */
+ sqlite3_file *jfd; /* File descriptor for main journal */
+ sqlite3_file *sjfd; /* File descriptor for sub-journal */
+ i64 journalOff; /* Current write offset in the journal file */
+ i64 journalHdr; /* Byte offset to previous journal header */
+ PagerSavepoint *aSavepoint; /* Array of active savepoints */
+ int nSavepoint; /* Number of elements in aSavepoint[] */
+ char dbFileVers[16]; /* Changes whenever database file changes */
+ u32 sectorSize; /* Assumed sector size during rollback */
+
int nExtra; /* Add this many bytes to each in-memory page */
+ u32 vfsFlags; /* Flags for sqlite3_vfs.xOpen() */
int pageSize; /* Number of bytes in a page */
- int nPage; /* Total number of in-memory pages */
- int mxPage; /* Maximum number of pages to hold in cache */
Pgno mxPgno; /* Maximum allowed size of the database */
- Bitvec *pInJournal; /* One bit for each page in the database file */
- Bitvec *pAlwaysRollback; /* One bit for each page marked always-rollback */
char *zFilename; /* Name of the database file */
char *zJournal; /* Name of the journal file */
- char *zDirectory; /* Directory hold database and journal files */
- sqlite3_file *fd, *jfd; /* File descriptors for database and journal */
- sqlite3_file *sjfd; /* File descriptor for the sub-journal*/
int (*xBusyHandler)(void*); /* Function to call when busy */
void *pBusyHandlerArg; /* Context argument for xBusyHandler */
- i64 journalOff; /* Current byte offset in the journal file */
- i64 journalHdr; /* Byte offset to previous journal header */
- u32 sectorSize; /* Assumed sector size during rollback */
#ifdef SQLITE_TEST
int nHit, nMiss; /* Cache hits and missing */
int nRead, nWrite; /* Database pages read/written */
void *pCodecArg; /* First argument to xCodec() */
#endif
char *pTmpSpace; /* Pager.pageSize bytes of space for tmp use */
- char dbFileVers[16]; /* Changes whenever database file changes */
i64 journalSizeLimit; /* Size limit for persistent journal files */
PCache *pPCache; /* Pointer to page cache object */
- PagerSavepoint *aSavepoint; /* Array of active savepoints */
- int nSavepoint; /* Number of elements in aSavepoint[] */
+ sqlite3_backup *pBackup; /* Pointer to list of ongoing backup processes */
};
/*
};
/*
-** The size of the header and of each page in the journal is determined
-** by the following macros.
+** The size of the of each page record in the journal is given by
+** the following macro.
*/
#define JOURNAL_PG_SZ(pPager) ((pPager->pageSize) + 8)
/*
-** The journal header size for this pager. In the future, this could be
-** set to some value read from the disk controller. The important
-** characteristic is that it is the same size as a disk sector.
+** The journal header size for this pager. This is usually the same
+** size as a single disk sector. See also setSectorSize().
*/
#define JOURNAL_HDR_SZ(pPager) (pPager->sectorSize)
#endif
/*
-** Page number PAGER_MJ_PGNO is never used in an SQLite database (it is
-** reserved for working around a windows/posix incompatibility). It is
-** used in the journal to signify that the remainder of the journal file
-** is devoted to storing a master journal name - there are no more pages to
-** roll back. See comments for function writeMasterJournal() for details.
+** The maximum legal page number is (2^31 - 1).
*/
-/* #define PAGER_MJ_PGNO(x) (PENDING_BYTE/((x)->pageSize)) */
-#define PAGER_MJ_PGNO(x) ((Pgno)((PENDING_BYTE/((x)->pageSize))+1))
+#define PAGER_MAX_PGNO 2147483647
+#ifndef NDEBUG
/*
-** The maximum legal page number is (2^31 - 1).
+** Usage:
+**
+** assert( assert_pager_state(pPager) );
*/
-#define PAGER_MAX_PGNO 2147483647
+static int assert_pager_state(Pager *pPager){
+
+ /* A temp-file is always in PAGER_EXCLUSIVE or PAGER_SYNCED state. */
+ assert( pPager->tempFile==0 || pPager->state>=PAGER_EXCLUSIVE );
+
+ /* The changeCountDone flag is always set for temp-files */
+ assert( pPager->tempFile==0 || pPager->changeCountDone );
+
+ return 1;
+}
+#endif
/*
** Return true if it is necessary to write page *pPg into the sub-journal.
return sqlite3OsWrite(fd, ac, 4, offset);
}
+/*
+** The argument to this macro is a file descriptor (type sqlite3_file*).
+** Return 0 if it is not open, or non-zero (but not 1) if it is.
+**
+** This is so that expressions can be written as:
+**
+** if( isOpen(pPager->jfd) ){ ...
+**
+** instead of
+**
+** if( pPager->jfd->pMethods ){ ...
+*/
+#define isOpen(pFd) ((pFd)->pMethods)
+
/*
** If file pFd is open, call sqlite3OsUnlock() on it.
*/
static int osUnlock(sqlite3_file *pFd, int eLock){
- if( !pFd->pMethods ){
+ if( !isOpen(pFd) ){
return SQLITE_OK;
}
return sqlite3OsUnlock(pFd, eLock);
** (b) the value returned by OsSectorSize() is less than or equal
** to the page size.
**
+** The optimization is also always enabled for temporary files. It is
+** an error to call this function if pPager is opened on an in-memory
+** database.
+**
** If the optimization cannot be used, 0 is returned. If it can be used,
** then the value returned is the size of the journal file when it
** contains rollback data for exactly one page.
*/
#ifdef SQLITE_ENABLE_ATOMIC_WRITE
static int jrnlBufferSize(Pager *pPager){
- int dc; /* Device characteristics */
- int nSector; /* Sector size */
- int szPage; /* Page size */
- sqlite3_file *fd = pPager->fd;
+ assert( !MEMDB );
+ if( !pPager->tempFile ){
+ int dc; /* Device characteristics */
+ int nSector; /* Sector size */
+ int szPage; /* Page size */
- if( fd->pMethods ){
- dc = sqlite3OsDeviceCharacteristics(fd);
+ assert( isOpen(pPager->fd) );
+ dc = sqlite3OsDeviceCharacteristics(pPager->fd);
nSector = pPager->sectorSize;
szPage = pPager->pageSize;
- }
-
- assert(SQLITE_IOCAP_ATOMIC512==(512>>8));
- assert(SQLITE_IOCAP_ATOMIC64K==(65536>>8));
- if( !fd->pMethods ||
- (dc & (SQLITE_IOCAP_ATOMIC|(szPage>>8)) && nSector<=szPage) ){
- return JOURNAL_HDR_SZ(pPager) + JOURNAL_PG_SZ(pPager);
- }
- return 0;
-}
-#endif
-
-/*
-** This function should be called when an error occurs within the pager
-** code. The first argument is a pointer to the pager structure, the
-** second the error-code about to be returned by a pager API function.
-** The value returned is a copy of the second argument to this function.
-**
-** If the second argument is SQLITE_IOERR, SQLITE_CORRUPT, or SQLITE_FULL
-** the error becomes persistent. Until the persisten error is cleared,
-** subsequent API calls on this Pager will immediately return the same
-** error code.
-**
-** A persistent error indicates that the contents of the pager-cache
-** cannot be trusted. This state can be cleared by completely discarding
-** the contents of the pager-cache. If a transaction was active when
-** the persistent error occured, then the rollback journal may need
-** to be replayed.
-*/
-static void pager_unlock(Pager *pPager);
-static int pager_error(Pager *pPager, int rc){
- int rc2 = rc & 0xff;
- assert(
- pPager->errCode==SQLITE_FULL ||
- pPager->errCode==SQLITE_OK ||
- (pPager->errCode & 0xff)==SQLITE_IOERR
- );
- if(
- rc2==SQLITE_FULL ||
- rc2==SQLITE_IOERR ||
- rc2==SQLITE_CORRUPT
- ){
- pPager->errCode = rc;
- if( pPager->state==PAGER_UNLOCK
- && sqlite3PcacheRefCount(pPager->pPCache)==0
- ){
- /* If the pager is already unlocked, call pager_unlock() now to
- ** clear the error state and ensure that the pager-cache is
- ** completely empty.
- */
- pager_unlock(pPager);
+ assert(SQLITE_IOCAP_ATOMIC512==(512>>8));
+ assert(SQLITE_IOCAP_ATOMIC64K==(65536>>8));
+ if( 0==(dc&(SQLITE_IOCAP_ATOMIC|(szPage>>8)) || nSector>szPage) ){
+ return 0;
}
}
- return rc;
+
+ return JOURNAL_HDR_SZ(pPager) + JOURNAL_PG_SZ(pPager);
}
+#endif
/*
** If SQLITE_CHECK_PAGES is defined then we do some sanity checking
/*
** When this is called the journal file for pager pPager must be open.
-** The master journal file name is read from the end of the file and
-** written into memory supplied by the caller.
+** This function attempts to read a master journal file name from the
+** end of the file and, if successful, copies it into memory supplied
+** by the caller. See comments above writeMasterJournal() for the format
+** used to store a master journal file name at the end of a journal file.
**
** zMaster must point to a buffer of at least nMaster bytes allocated by
** the caller. This should be sqlite3_vfs.mxPathname+1 (to ensure there is
** nul-terminator), then this is handled as if no master journal name
** were present in the journal.
**
-** If no master journal file name is present zMaster[0] is set to 0 and
-** SQLITE_OK returned.
+** If a master journal file name is present at the end of the journal
+** file, then it is copied into the buffer pointed to by zMaster. A
+** nul-terminator byte is appended to the buffer following the master
+** journal file name.
+**
+** If it is determined that no master journal file name is present
+** zMaster[0] is set to 0 and SQLITE_OK returned.
+**
+** If an error occurs while reading from the journal file, an SQLite
+** error code is returned.
*/
static int readMasterJournal(sqlite3_file *pJrnl, char *zMaster, u32 nMaster){
- int rc;
- u32 len;
- i64 szJ;
- u32 cksum;
- u32 u; /* Unsigned loop counter */
- unsigned char aMagic[8]; /* A buffer to hold the magic header */
-
+ int rc; /* Return code */
+ u32 len; /* Length in bytes of master journal name */
+ i64 szJ; /* Total size in bytes of journal file pJrnl */
+ u32 cksum; /* MJ checksum value read from journal */
+ u32 u; /* Unsigned loop counter */
+ unsigned char aMagic[8]; /* A buffer to hold the magic header */
zMaster[0] = '\0';
- rc = sqlite3OsFileSize(pJrnl, &szJ);
- if( rc!=SQLITE_OK || szJ<16 ) return rc;
-
- rc = read32bits(pJrnl, szJ-16, &len);
- if( rc!=SQLITE_OK ) return rc;
-
- if( len>=nMaster ){
- return SQLITE_OK;
- }
-
- rc = read32bits(pJrnl, szJ-12, &cksum);
- if( rc!=SQLITE_OK ) return rc;
-
- rc = sqlite3OsRead(pJrnl, aMagic, 8, szJ-8);
- if( rc!=SQLITE_OK || memcmp(aMagic, aJournalMagic, 8) ) return rc;
-
- rc = sqlite3OsRead(pJrnl, zMaster, len, szJ-16-len);
- if( rc!=SQLITE_OK ){
+ if( SQLITE_OK!=(rc = sqlite3OsFileSize(pJrnl, &szJ))
+ || szJ<16
+ || SQLITE_OK!=(rc = read32bits(pJrnl, szJ-16, &len))
+ || len>=nMaster
+ || SQLITE_OK!=(rc = read32bits(pJrnl, szJ-12, &cksum))
+ || SQLITE_OK!=(rc = sqlite3OsRead(pJrnl, aMagic, 8, szJ-8))
+ || memcmp(aMagic, aJournalMagic, 8)
+ || SQLITE_OK!=(rc = sqlite3OsRead(pJrnl, zMaster, len, szJ-16-len))
+ ){
return rc;
}
- zMaster[len] = '\0';
/* See if the checksum matches the master journal name */
for(u=0; u<len; u++){
cksum -= zMaster[u];
- }
+ }
if( cksum ){
/* If the checksum doesn't add up, then one or more of the disk sectors
** containing the master journal filename is corrupted. This means
** definitely roll back, so just return SQLITE_OK and report a (nul)
** master-journal filename.
*/
- zMaster[0] = '\0';
+ len = 0;
}
+ zMaster[len] = '\0';
return SQLITE_OK;
}
/*
-** Seek the journal file descriptor to the next sector boundary where a
-** journal header may be read or written. Pager.journalOff is updated with
-** the new seek offset.
+** Return the offset of the sector boundary at or immediately
+** following the value in pPager->journalOff, assuming a sector
+** size of pPager->sectorSize bytes.
**
** i.e for a sector size of 512:
**
-** Input Offset Output Offset
-** ---------------------------------------
-** 0 0
-** 512 512
-** 100 512
-** 2000 2048
+** Pager.journalOff Return value
+** ---------------------------------------
+** 0 0
+** 512 512
+** 100 512
+** 2000 2048
**
*/
static i64 journalHdrOffset(Pager *pPager){
assert( (offset-c)<JOURNAL_HDR_SZ(pPager) );
return offset;
}
-static void seekJournalHdr(Pager *pPager){
- pPager->journalOff = journalHdrOffset(pPager);
-}
/*
-** Write zeros over the header of the journal file. This has the
-** effect of invalidating the journal file and committing the
-** transaction.
+** The journal file must be open when this function is called.
+**
+** This function is a no-op if the journal file has not been written to
+** within the current transaction (i.e. if Pager.journalOff==0).
+**
+** If doTruncate is non-zero or the Pager.journalSizeLimit variable is
+** set to 0, then truncate the journal file to zero bytes in size. Otherwise,
+** zero the 28-byte header at the start of the journal file. In either case,
+** if the pager is not in no-sync mode, sync the journal file immediately
+** after writing or truncating it.
+**
+** If Pager.journalSizeLimit is set to a positive, non-zero value, and
+** following the truncation or zeroing described above the size of the
+** journal file in bytes is larger than this value, then truncate the
+** journal file to Pager.journalSizeLimit bytes. The journal file does
+** not need to be synced following this operation.
+**
+** If an IO error occurs, abandon processing and return the IO error code.
+** Otherwise, return SQLITE_OK.
*/
static int zeroJournalHdr(Pager *pPager, int doTruncate){
- int rc = SQLITE_OK;
- static const char zeroHdr[28] = {0};
-
+ int rc = SQLITE_OK; /* Return code */
+ assert( isOpen(pPager->jfd) );
if( pPager->journalOff ){
- i64 iLimit = pPager->journalSizeLimit;
+ const i64 iLimit = pPager->journalSizeLimit; /* Local cache of jsl */
IOTRACE(("JZEROHDR %p\n", pPager))
if( doTruncate || iLimit==0 ){
rc = sqlite3OsTruncate(pPager->jfd, 0);
}else{
+ static const char zeroHdr[28] = {0};
rc = sqlite3OsWrite(pPager->jfd, zeroHdr, sizeof(zeroHdr), 0);
}
if( rc==SQLITE_OK && !pPager->noSync ){
** Followed by (JOURNAL_HDR_SZ - 28) bytes of unused space.
*/
static int writeJournalHdr(Pager *pPager){
- int rc = SQLITE_OK;
- char *zHeader = pPager->pTmpSpace;
- u32 nHeader = pPager->pageSize;
- u32 nWrite;
- int ii;
+ int rc = SQLITE_OK; /* Return code */
+ char *zHeader = pPager->pTmpSpace; /* Temporary space used to build header */
+ u32 nHeader = pPager->pageSize; /* Size of buffer pointed to by zHeader */
+ u32 nWrite; /* Bytes of header sector written */
+ int ii; /* Loop counter */
+
+ assert( isOpen(pPager->jfd) ); /* Journal file must be open. */
if( nHeader>JOURNAL_HDR_SZ(pPager) ){
nHeader = JOURNAL_HDR_SZ(pPager);
}
- /* If there are active savepoints and any of them were created since the
- ** most recent journal header was written, update the PagerSavepoint.iHdrOff
- ** fields now.
+ /* If there are active savepoints and any of them were created
+ ** since the most recent journal header was written, update the
+ ** PagerSavepoint.iHdrOffset fields now.
*/
for(ii=0; ii<pPager->nSavepoint; ii++){
if( pPager->aSavepoint[ii].iHdrOffset==0 ){
}
}
- seekJournalHdr(pPager);
- pPager->journalHdr = pPager->journalOff;
-
+ pPager->journalHdr = pPager->journalOff = journalHdrOffset(pPager);
memcpy(zHeader, aJournalMagic, sizeof(aJournalMagic));
/*
** * When the SQLITE_IOCAP_SAFE_APPEND flag is set. This guarantees
** that garbage data is never appended to the journal file.
*/
- assert(pPager->fd->pMethods||pPager->noSync);
+ assert( isOpen(pPager->fd) || pPager->noSync );
if( (pPager->noSync) || (pPager->journalMode==PAGER_JOURNALMODE_MEMORY)
|| (sqlite3OsDeviceCharacteristics(pPager->fd)&SQLITE_IOCAP_SAFE_APPEND)
){
/* The assumed sector size for this process */
put32bits(&zHeader[sizeof(aJournalMagic)+12], pPager->sectorSize);
+ /* The page size */
+ put32bits(&zHeader[sizeof(aJournalMagic)+16], pPager->pageSize);
+
/* Initializing the tail of the buffer is not necessary. Everything
** works find if the following memset() is omitted. But initializing
** the memory prevents valgrind from complaining, so we are willing to
** take the performance hit.
*/
- memset(&zHeader[sizeof(aJournalMagic)+16], 0,
- nHeader-(sizeof(aJournalMagic)+16));
-
- if( pPager->journalHdr==0 ){
- /* The page size */
- put32bits(&zHeader[sizeof(aJournalMagic)+16], pPager->pageSize);
- }
+ memset(&zHeader[sizeof(aJournalMagic)+20], 0,
+ nHeader-(sizeof(aJournalMagic)+20));
+ /* In theory, it is only necessary to write the 28 bytes that the
+ ** journal header consumes to the journal file here. Then increment the
+ ** Pager.journalOff variable by JOURNAL_HDR_SZ so that the next
+ ** record is written to the following sector (leaving a gap in the file
+ ** that will be implicitly filled in by the OS).
+ **
+ ** However it has been discovered that on some systems this pattern can
+ ** be significantly slower than contiguously writing data to the file,
+ ** even if that means explicitly writing data to the block of
+ ** (JOURNAL_HDR_SZ - 28) bytes that will not be used. So that is what
+ ** is done.
+ **
+ ** The loop is required here in case the sector-size is larger than the
+ ** database page size. Since the zHeader buffer is only Pager.pageSize
+ ** bytes in size, more than one call to sqlite3OsWrite() may be required
+ ** to populate the entire journal header sector.
+ */
for(nWrite=0; rc==SQLITE_OK&&nWrite<JOURNAL_HDR_SZ(pPager); nWrite+=nHeader){
IOTRACE(("JHDR %p %lld %d\n", pPager, pPager->journalHdr, nHeader))
rc = sqlite3OsWrite(pPager->jfd, zHeader, nHeader, pPager->journalOff);
** The journal file must be open when this is called. A journal header file
** (JOURNAL_HDR_SZ bytes) is read from the current location in the journal
** file. The current location in the journal file is given by
-** pPager->journalOff. See comments above function writeJournalHdr() for
+** pPager->journalOff. See comments above function writeJournalHdr() for
** a description of the journal header format.
**
-** If the header is read successfully, *nRec is set to the number of
-** page records following this header and *dbSize is set to the size of the
+** If the header is read successfully, *pNRec is set to the number of
+** page records following this header and *pDbSize is set to the size of the
** database before the transaction began, in pages. Also, pPager->cksumInit
** is set to the value read from the journal header. SQLITE_OK is returned
** in this case.
**
** If the journal header file appears to be corrupted, SQLITE_DONE is
-** returned and *nRec and *dbSize are undefined. If JOURNAL_HDR_SZ bytes
+** returned and *pNRec and *PDbSize are undefined. If JOURNAL_HDR_SZ bytes
** cannot be read from the journal file an error code is returned.
*/
static int readJournalHdr(
- Pager *pPager,
- i64 journalSize,
- u32 *pNRec,
- u32 *pDbSize
+ Pager *pPager, /* Pager object */
+ i64 journalSize, /* Size of the open journal file in bytes */
+ u32 *pNRec, /* OUT: Value read from the nRec field */
+ u32 *pDbSize /* OUT: Value of original database size field */
){
- int rc;
- unsigned char aMagic[8]; /* A buffer to hold the magic header */
- i64 jrnlOff;
- u32 iPageSize;
- u32 iSectorSize;
+ int rc; /* Return code */
+ unsigned char aMagic[8]; /* A buffer to hold the magic header */
+ i64 iHdrOff; /* Offset of journal header being read */
+
+ assert( isOpen(pPager->jfd) ); /* Journal file must be open. */
- seekJournalHdr(pPager);
+ /* Advance Pager.journalOff to the start of the next sector. If the
+ ** journal file is too small for there to be a header stored at this
+ ** point, return SQLITE_DONE.
+ */
+ pPager->journalOff = journalHdrOffset(pPager);
if( pPager->journalOff+JOURNAL_HDR_SZ(pPager) > journalSize ){
return SQLITE_DONE;
}
- jrnlOff = pPager->journalOff;
-
- rc = sqlite3OsRead(pPager->jfd, aMagic, sizeof(aMagic), jrnlOff);
- if( rc ) return rc;
- jrnlOff += sizeof(aMagic);
+ iHdrOff = pPager->journalOff;
+ /* Read in the first 8 bytes of the journal header. If they do not match
+ ** the magic string found at the start of each journal header, return
+ ** SQLITE_DONE. If an IO error occurs, return an error code. Otherwise,
+ ** proceed.
+ */
+ rc = sqlite3OsRead(pPager->jfd, aMagic, sizeof(aMagic), iHdrOff);
+ if( rc ){
+ return rc;
+ }
if( memcmp(aMagic, aJournalMagic, sizeof(aMagic))!=0 ){
return SQLITE_DONE;
}
- rc = read32bits(pPager->jfd, jrnlOff, pNRec);
- if( rc ) return rc;
-
- rc = read32bits(pPager->jfd, jrnlOff+4, &pPager->cksumInit);
- if( rc ) return rc;
-
- rc = read32bits(pPager->jfd, jrnlOff+8, pDbSize);
- if( rc ) return rc;
+ /* Read the first three 32-bit fields of the journal header: The nRec
+ ** field, the checksum-initializer and the database size at the start
+ ** of the transaction. Return an error code if anything goes wrong.
+ */
+ if( SQLITE_OK!=(rc = read32bits(pPager->jfd, iHdrOff+8, pNRec))
+ || SQLITE_OK!=(rc = read32bits(pPager->jfd, iHdrOff+12, &pPager->cksumInit))
+ || SQLITE_OK!=(rc = read32bits(pPager->jfd, iHdrOff+16, pDbSize))
+ ){
+ return rc;
+ }
if( pPager->journalOff==0 ){
- rc = read32bits(pPager->jfd, jrnlOff+16, &iPageSize);
- if( rc ) return rc;
+ u32 iPageSize; /* Page-size field of journal header */
+ u32 iSectorSize; /* Sector-size field of journal header */
+ u16 iPageSize16; /* Copy of iPageSize in 16-bit variable */
+
+ /* Read the page-size and sector-size journal header fields. */
+ if( SQLITE_OK!=(rc = read32bits(pPager->jfd, iHdrOff+20, &iSectorSize))
+ || SQLITE_OK!=(rc = read32bits(pPager->jfd, iHdrOff+24, &iPageSize))
+ ){
+ return rc;
+ }
- if( iPageSize<512
- || iPageSize>SQLITE_MAX_PAGE_SIZE
- || ((iPageSize-1)&iPageSize)!=0
+ /* Check that the values read from the page-size and sector-size fields
+ ** are within range. To be 'in range', both values need to be a power
+ ** of two greater than or equal to 512, and not greater than their
+ ** respective compile time maximum limits.
+ */
+ if( iPageSize<512 || iSectorSize<512
+ || iPageSize>SQLITE_MAX_PAGE_SIZE || iSectorSize>MAX_SECTOR_SIZE
+ || ((iPageSize-1)&iPageSize)!=0 || ((iSectorSize-1)&iSectorSize)!=0
){
- /* If the page-size in the journal-header is invalid, then the process
- ** that wrote the journal-header must have crashed before the header
- ** was synced. In this case stop reading the journal file here.
+ /* If the either the page-size or sector-size in the journal-header is
+ ** invalid, then the process that wrote the journal-header must have
+ ** crashed before the header was synced. In this case stop reading
+ ** the journal file here.
*/
- rc = SQLITE_DONE;
- }else{
- u16 pagesize = (u16)iPageSize;
- rc = sqlite3PagerSetPagesize(pPager, &pagesize);
- assert( rc!=SQLITE_OK || pagesize==(u16)iPageSize );
+ return SQLITE_DONE;
}
- if( rc ) return rc;
-
+
+ /* Update the page-size to match the value read from the journal.
+ ** Use a testcase() macro to make sure that malloc failure within
+ ** PagerSetPagesize() is tested.
+ */
+ iPageSize16 = (u16)iPageSize;
+ rc = sqlite3PagerSetPagesize(pPager, &iPageSize16);
+ testcase( rc!=SQLITE_OK );
+ assert( rc!=SQLITE_OK || iPageSize16==(u16)iPageSize );
+
/* Update the assumed sector-size to match the value used by
** the process that created this journal. If this journal was
** created by a process other than this one, then this routine
** is being called from within pager_playback(). The local value
** of Pager.sectorSize is restored at the end of that routine.
*/
- rc = read32bits(pPager->jfd, jrnlOff+12, &iSectorSize);
- if( rc ) return rc;
- if( (iSectorSize&(iSectorSize-1))
- || iSectorSize<512
- || iSectorSize>MAX_SECTOR_SIZE
- ){
- return SQLITE_DONE;
- }
pPager->sectorSize = iSectorSize;
}
pPager->journalOff += JOURNAL_HDR_SZ(pPager);
- return SQLITE_OK;
+ return rc;
}
** journal file descriptor is advanced to the next sector boundary before
** anything is written. The format is:
**
-** + 4 bytes: PAGER_MJ_PGNO.
-** + N bytes: length of master journal name.
-** + 4 bytes: N
-** + 4 bytes: Master journal name checksum.
-** + 8 bytes: aJournalMagic[].
+** + 4 bytes: PAGER_MJ_PGNO.
+** + N bytes: Master journal filename in utf-8.
+** + 4 bytes: N (length of master journal name in bytes, no nul-terminator).
+** + 4 bytes: Master journal name checksum.
+** + 8 bytes: aJournalMagic[].
**
** The master journal page checksum is the sum of the bytes in the master
-** journal name.
+** journal name, where each byte is interpreted as a signed 8-bit integer.
**
** If zMaster is a NULL pointer (occurs for a single database transaction),
** this call is a no-op.
*/
static int writeMasterJournal(Pager *pPager, const char *zMaster){
- int rc;
- int len;
- int i;
- i64 jrnlOff;
- i64 jrnlSize;
- u32 cksum = 0;
- char zBuf[sizeof(aJournalMagic)+2*4];
-
- if( !zMaster || pPager->setMaster ) return SQLITE_OK;
- if( pPager->journalMode==PAGER_JOURNALMODE_MEMORY ) return SQLITE_OK;
+ int rc; /* Return code */
+ int nMaster; /* Length of string zMaster */
+ i64 iHdrOff; /* Offset of header in journal file */
+ i64 jrnlSize; /* Size of journal file on disk */
+ u32 cksum = 0; /* Checksum of string zMaster */
+
+ if( !zMaster || pPager->setMaster
+ || pPager->journalMode==PAGER_JOURNALMODE_MEMORY
+ || pPager->journalMode==PAGER_JOURNALMODE_OFF
+ ){
+ return SQLITE_OK;
+ }
pPager->setMaster = 1;
+ assert( isOpen(pPager->jfd) );
- len = sqlite3Strlen30(zMaster);
- for(i=0; i<len; i++){
- cksum += zMaster[i];
+ /* Calculate the length in bytes and the checksum of zMaster */
+ for(nMaster=0; zMaster[nMaster]; nMaster++){
+ cksum += zMaster[nMaster];
}
/* If in full-sync mode, advance to the next disk sector before writing
** the journal has already been synced.
*/
if( pPager->fullSync ){
- seekJournalHdr(pPager);
+ pPager->journalOff = journalHdrOffset(pPager);
}
- jrnlOff = pPager->journalOff;
- pPager->journalOff += (len+20);
-
- rc = write32bits(pPager->jfd, jrnlOff, PAGER_MJ_PGNO(pPager));
- if( rc!=SQLITE_OK ) return rc;
- jrnlOff += 4;
+ iHdrOff = pPager->journalOff;
- rc = sqlite3OsWrite(pPager->jfd, zMaster, len, jrnlOff);
- if( rc!=SQLITE_OK ) return rc;
- jrnlOff += len;
-
- put32bits(zBuf, len);
- put32bits(&zBuf[4], cksum);
- memcpy(&zBuf[8], aJournalMagic, sizeof(aJournalMagic));
- rc = sqlite3OsWrite(pPager->jfd, zBuf, 8+sizeof(aJournalMagic), jrnlOff);
- jrnlOff += 8+sizeof(aJournalMagic);
+ /* Write the master journal data to the end of the journal file. If
+ ** an error occurs, return the error code to the caller.
+ */
+ if( (0 != (rc = write32bits(pPager->jfd, iHdrOff, PAGER_MJ_PGNO(pPager))))
+ || (0 != (rc = sqlite3OsWrite(pPager->jfd, zMaster, nMaster, iHdrOff+4)))
+ || (0 != (rc = write32bits(pPager->jfd, iHdrOff+4+nMaster, nMaster)))
+ || (0 != (rc = write32bits(pPager->jfd, iHdrOff+4+nMaster+4, cksum)))
+ || (0 != (rc = sqlite3OsWrite(pPager->jfd, aJournalMagic, 8, iHdrOff+4+nMaster+8)))
+ ){
+ return rc;
+ }
+ pPager->journalOff += (nMaster+20);
pPager->needSync = !pPager->noSync;
/* If the pager is in peristent-journal mode, then the physical
** Easiest thing to do in this scenario is to truncate the journal
** file to the required size.
*/
- if( (rc==SQLITE_OK)
- && (rc = sqlite3OsFileSize(pPager->jfd, &jrnlSize))==SQLITE_OK
- && jrnlSize>jrnlOff
+ if( SQLITE_OK==(rc = sqlite3OsFileSize(pPager->jfd, &jrnlSize))
+ && jrnlSize>pPager->journalOff
){
- rc = sqlite3OsTruncate(pPager->jfd, jrnlOff);
+ rc = sqlite3OsTruncate(pPager->jfd, pPager->journalOff);
}
return rc;
}
/*
-** Find a page in the hash table given its page number. Return
-** a pointer to the page or NULL if not found.
+** Find a page in the hash table given its page number. Return
+** a pointer to the page or NULL if the requested page is not
+** already in memory.
*/
static PgHdr *pager_lookup(Pager *pPager, Pgno pgno){
- PgHdr *p;
- sqlite3PcacheFetch(pPager->pPCache, pgno, 0, &p);
+ PgHdr *p; /* Return value */
+
+ /* It is not possible for a call to PcacheFetch() with createFlag==0 to
+ ** fail, since no attempt to allocate dynamic memory will be made.
+ */
+ (void)sqlite3PcacheFetch(pPager->pPCache, pgno, 0, &p);
return p;
}
/*
-** Clear the in-memory cache. This routine
-** sets the state of the pager back to what it was when it was first
-** opened. Any outstanding pages are invalidated and subsequent attempts
-** to access those pages will likely result in a coredump.
+** Unless the pager is in error-state, discard all in-memory pages. If
+** the pager is in error-state, then this call is a no-op.
+**
+** TODO: Why can we not reset the pager while in error state?
*/
static void pager_reset(Pager *pPager){
- if( pPager->errCode ) return;
- sqlite3PcacheClear(pPager->pPCache);
+ if( SQLITE_OK==pPager->errCode ){
+ sqlite3BackupRestart(pPager->pBackup);
+ sqlite3PcacheClear(pPager->pPCache);
+ }
}
/*
** Pager.aSavepoint and Pager.nSavepoint to zero. Close the sub-journal
** if it is open and the pager is not in exclusive mode.
*/
-static void releaseAllSavepoint(Pager *pPager){
- int ii;
+static void releaseAllSavepoints(Pager *pPager){
+ int ii; /* Iterator for looping through Pager.aSavepoint */
for(ii=0; ii<pPager->nSavepoint; ii++){
sqlite3BitvecDestroy(pPager->aSavepoint[ii].pInSavepoint);
}
sqlite3_free(pPager->aSavepoint);
pPager->aSavepoint = 0;
pPager->nSavepoint = 0;
- pPager->stmtNRec = 0;
+ pPager->nSubRec = 0;
}
/*
-** Set the bit number pgno in the PagerSavepoint.pInSavepoint bitvecs of
-** all open savepoints.
+** Set the bit number pgno in the PagerSavepoint.pInSavepoint
+** bitvecs of all open savepoints. Return SQLITE_OK if successful
+** or SQLITE_NOMEM if a malloc failure occurs.
*/
static int addToSavepointBitvecs(Pager *pPager, Pgno pgno){
int ii; /* Loop counter */
PagerSavepoint *p = &pPager->aSavepoint[ii];
if( pgno<=p->nOrig ){
rc |= sqlite3BitvecSet(p->pInSavepoint, pgno);
+ testcase( rc==SQLITE_NOMEM );
assert( rc==SQLITE_OK || rc==SQLITE_NOMEM );
}
}
}
/*
-** Unlock the database file.
+** Unlock the database file. This function is a no-op if the pager
+** is in exclusive mode.
**
** If the pager is currently in error state, discard the contents of
** the cache and reset the Pager structure internal state. If there is
*/
static void pager_unlock(Pager *pPager){
if( !pPager->exclusiveMode ){
- int rc;
+ int rc; /* Return code */
/* Always close the journal file when dropping the database lock.
** Otherwise, another connection with journal_mode=delete might
** delete the file out from under us.
*/
- if( pPager->journalOpen ){
- sqlite3OsClose(pPager->jfd);
- pPager->journalOpen = 0;
- sqlite3BitvecDestroy(pPager->pInJournal);
- pPager->pInJournal = 0;
- sqlite3BitvecDestroy(pPager->pAlwaysRollback);
- pPager->pAlwaysRollback = 0;
- }
+ sqlite3OsClose(pPager->jfd);
+ sqlite3BitvecDestroy(pPager->pInJournal);
+ pPager->pInJournal = 0;
+ releaseAllSavepoints(pPager);
- rc = osUnlock(pPager->fd, NO_LOCK);
- if( rc ) pPager->errCode = rc;
+ /* If the file is unlocked, somebody else might change it. The
+ ** values stored in Pager.dbSize etc. might become invalid if
+ ** this happens. TODO: Really, this doesn't need to be cleared
+ ** until the change-counter check fails in pagerSharedLock().
+ */
pPager->dbSizeValid = 0;
+
+ rc = osUnlock(pPager->fd, NO_LOCK);
+ if( rc ){
+ pPager->errCode = rc;
+ }
IOTRACE(("UNLOCK %p\n", pPager))
/* If Pager.errCode is set, the contents of the pager cache cannot be
** cache can be discarded and the error code safely cleared.
*/
if( pPager->errCode ){
- if( rc==SQLITE_OK ) pPager->errCode = SQLITE_OK;
+ if( rc==SQLITE_OK ){
+ pPager->errCode = SQLITE_OK;
+ }
pager_reset(pPager);
- releaseAllSavepoint(pPager);
- pPager->journalOff = 0;
- pPager->journalStarted = 0;
- pPager->dbOrigSize = 0;
}
- pPager->state = PAGER_UNLOCK;
pPager->changeCountDone = 0;
+ pPager->state = PAGER_UNLOCK;
}
}
/*
-** Execute a rollback if a transaction is active and unlock the
-** database file. If the pager has already entered the error state,
-** do not attempt the rollback.
+** This function should be called when an IOERR, CORRUPT or FULL error
+** may have occured. The first argument is a pointer to the pager
+** structure, the second the error-code about to be returned by a pager
+** API function. The value returned is a copy of the second argument
+** to this function.
+**
+** If the second argument is SQLITE_IOERR, SQLITE_CORRUPT, or SQLITE_FULL
+** the error becomes persistent. Until the persisten error is cleared,
+** subsequent API calls on this Pager will immediately return the same
+** error code.
+**
+** A persistent error indicates that the contents of the pager-cache
+** cannot be trusted. This state can be cleared by completely discarding
+** the contents of the pager-cache. If a transaction was active when
+** the persistent error occured, then the rollback journal may need
+** to be replayed to restore the contents of the database file (as if
+** it were a hot-journal).
*/
-static void pagerUnlockAndRollback(Pager *p){
- if( p->errCode==SQLITE_OK && p->state>=PAGER_RESERVED ){
+static int pager_error(Pager *pPager, int rc){
+ int rc2 = rc & 0xff;
+ assert(
+ pPager->errCode==SQLITE_FULL ||
+ pPager->errCode==SQLITE_OK ||
+ (pPager->errCode & 0xff)==SQLITE_IOERR
+ );
+ if(
+ rc2==SQLITE_FULL ||
+ rc2==SQLITE_IOERR ||
+ rc2==SQLITE_CORRUPT
+ ){
+ pPager->errCode = rc;
+ if( pPager->state==PAGER_UNLOCK
+ && sqlite3PcacheRefCount(pPager->pPCache)==0
+ ){
+ /* If the pager is already unlocked, call pager_unlock() now to
+ ** clear the error state and ensure that the pager-cache is
+ ** completely empty.
+ */
+ pager_unlock(pPager);
+ }
+ }
+ return rc;
+}
+
+/*
+** Execute a rollback if a transaction is active and unlock the
+** database file.
+**
+** If the pager has already entered the error state, do not attempt
+** the rollback at this time. Instead, pager_unlock() is called. The
+** call to pager_unlock() will discard all in-memory pages, unlock
+** the database file and clear the error state. If this means that
+** there is a hot-journal left in the file-system, the next connection
+** to obtain a shared lock on the pager (which may be this one) will
+** roll it back.
+**
+** If the pager has not already entered the error state, but an IO or
+** malloc error occurs during a rollback, then this will itself cause
+** the pager to enter the error state. Which will be cleared by the
+** call to pager_unlock(), as described above.
+*/
+static void pagerUnlockAndRollback(Pager *pPager){
+ if( pPager->errCode==SQLITE_OK && pPager->state>=PAGER_RESERVED ){
sqlite3BeginBenignMalloc();
- sqlite3PagerRollback(p);
+ sqlite3PagerRollback(pPager);
sqlite3EndBenignMalloc();
}
- pager_unlock(p);
+ pager_unlock(pPager);
}
/*
-** This routine ends a transaction. A transaction is ended by either
-** a COMMIT or a ROLLBACK.
-**
-** When this routine is called, the pager has the journal file open and
-** a RESERVED or EXCLUSIVE lock on the database. This routine will release
-** the database lock and acquires a SHARED lock in its place if that is
-** the appropriate thing to do. Release locks usually is appropriate,
-** unless we are in exclusive access mode or unless this is a
-** COMMIT AND BEGIN or ROLLBACK AND BEGIN operation.
-**
-** The journal file is either deleted or truncated.
-**
-** TODO: Consider keeping the journal file open for temporary databases.
-** This might give a performance improvement on windows where opening
-** a file is an expensive operation.
+** This routine ends a transaction. A transaction is usually ended by
+** either a COMMIT or a ROLLBACK operation. This routine may be called
+** after rollback of a hot-journal, or if an error occurs while opening
+** the journal file or writing the very first journal-header of a
+** database transaction.
+**
+** If the pager is in PAGER_SHARED or PAGER_UNLOCK state when this
+** routine is called, it is a no-op (returns SQLITE_OK).
+**
+** Otherwise, any active savepoints are released.
+**
+** If the journal file is open, then it is "finalized". Once a journal
+** file has been finalized it is not possible to use it to roll back a
+** transaction. Nor will it be considered to be a hot-journal by this
+** or any other database connection. Exactly how a journal is finalized
+** depends on whether or not the pager is running in exclusive mode and
+** the current journal-mode (Pager.journalMode value), as follows:
+**
+** journalMode==MEMORY
+** Journal file descriptor is simply closed. This destroys an
+** in-memory journal.
+**
+** journalMode==TRUNCATE
+** Journal file is truncated to zero bytes in size.
+**
+** journalMode==PERSIST
+** The first 28 bytes of the journal file are zeroed. This invalidates
+** the first journal header in the file, and hence the entire journal
+** file. An invalid journal file cannot be rolled back.
+**
+** journalMode==DELETE
+** The journal file is closed and deleted using sqlite3OsDelete().
+**
+** If the pager is running in exclusive mode, this method of finalizing
+** the journal file is never used. Instead, if the journalMode is
+** DELETE and the pager is in exclusive mode, the method described under
+** journalMode==PERSIST is used instead.
+**
+** After the journal is finalized, if running in non-exclusive mode, the
+** pager moves to PAGER_SHARED state (and downgrades the lock on the
+** database file accordingly).
+**
+** If the pager is running in exclusive mode and is in PAGER_SYNCED state,
+** it moves to PAGER_EXCLUSIVE. No locks are downgraded when running in
+** exclusive mode.
+**
+** SQLITE_OK is returned if no error occurs. If an error occurs during
+** any of the IO operations to finalize the journal file or unlock the
+** database then the IO error code is returned to the user. If the
+** operation to finalize the journal file fails, then the code still
+** tries to unlock the database file if not in exclusive mode. If the
+** unlock operation fails as well, then the first error code related
+** to the first error encountered (the journal finalization one) is
+** returned.
*/
static int pager_end_transaction(Pager *pPager, int hasMaster){
- int rc = SQLITE_OK;
- int rc2 = SQLITE_OK;
+ int rc = SQLITE_OK; /* Error code from journal finalization operation */
+ int rc2 = SQLITE_OK; /* Error code from db file unlock operation */
+
if( pPager->state<PAGER_RESERVED ){
return SQLITE_OK;
}
- releaseAllSavepoint(pPager);
- if( pPager->journalOpen ){
+ releaseAllSavepoints(pPager);
+
+ assert( isOpen(pPager->jfd) || pPager->pInJournal==0 );
+ if( isOpen(pPager->jfd) ){
+
+ /* TODO: There's a problem here if a journal-file was opened in MEMORY
+ ** mode and then the journal-mode is changed to TRUNCATE or PERSIST
+ ** during the transaction. This code should be changed to assume
+ ** that the journal mode has not changed since the transaction was
+ ** started. And the sqlite3PagerJournalMode() function should be
+ ** changed to make sure that this is the case too.
+ */
+
+ /* Finalize the journal file. */
if( pPager->journalMode==PAGER_JOURNALMODE_MEMORY ){
int isMemoryJournal = sqlite3IsMemJournal(pPager->jfd);
sqlite3OsClose(pPager->jfd);
- pPager->journalOpen = 0;
if( !isMemoryJournal ){
rc = sqlite3OsDelete(pPager->pVfs, pPager->zJournal, 0);
}
- }else if( pPager->journalMode==PAGER_JOURNALMODE_TRUNCATE
- && (rc = sqlite3OsTruncate(pPager->jfd, 0))==SQLITE_OK ){
+ }else if( pPager->journalMode==PAGER_JOURNALMODE_TRUNCATE ){
+ rc = sqlite3OsTruncate(pPager->jfd, 0);
pPager->journalOff = 0;
pPager->journalStarted = 0;
}else if( pPager->exclusiveMode
}else{
assert( pPager->journalMode==PAGER_JOURNALMODE_DELETE || rc );
sqlite3OsClose(pPager->jfd);
- pPager->journalOpen = 0;
if( rc==SQLITE_OK && !pPager->tempFile ){
rc = sqlite3OsDelete(pPager->pVfs, pPager->zJournal, 0);
}
}
- sqlite3BitvecDestroy(pPager->pInJournal);
- pPager->pInJournal = 0;
- sqlite3BitvecDestroy(pPager->pAlwaysRollback);
- pPager->pAlwaysRollback = 0;
+
#ifdef SQLITE_CHECK_PAGES
sqlite3PcacheIterateDirty(pPager->pPCache, pager_set_pagehash);
#endif
+
sqlite3PcacheCleanAll(pPager->pPCache);
- pPager->dirtyCache = 0;
+ sqlite3BitvecDestroy(pPager->pInJournal);
+ pPager->pInJournal = 0;
pPager->nRec = 0;
- }else{
- assert( pPager->pInJournal==0 );
}
if( !pPager->exclusiveMode ){
}else if( pPager->state==PAGER_SYNCED ){
pPager->state = PAGER_EXCLUSIVE;
}
- pPager->dbOrigSize = 0;
pPager->setMaster = 0;
pPager->needSync = 0;
- /* lruListSetFirstSynced(pPager); */
+ pPager->dbModified = 0;
+
+ /* TODO: Is this optimal? Why is the db size invalidated here
+ ** when the database file is not unlocked? */
+ pPager->dbOrigSize = 0;
sqlite3PcacheTruncate(pPager->pPCache, pPager->dbSize);
if( !MEMDB ){
pPager->dbSizeValid = 0;
}
- pPager->dbModified = 0;
return (rc==SQLITE_OK?rc2:rc);
}
/*
-** Compute and return a checksum for the page of data.
+** Parameter aData must point to a buffer of pPager->pageSize bytes
+** of data. Compute and return a checksum based ont the contents of the
+** page of data and the current value of pPager->cksumInit.
**
-** This is not a real checksum. It is really just the sum of the
-** random initial value and the page number. We experimented with
-** a checksum of the entire data, but that was found to be too slow.
+** This is not a real checksum. It is really just the sum of the
+** random initial value (pPager->cksumInit) and every 200th byte
+** of the page data, starting with byte offset (pPager->pageSize%200).
+** Each byte is interpreted as an 8-bit unsigned integer.
**
-** Note that the page number is stored at the beginning of data and
-** the checksum is stored at the end. This is important. If journal
-** corruption occurs due to a power failure, the most likely scenario
-** is that one end or the other of the record will be changed. It is
-** much less likely that the two ends of the journal record will be
+** Changing the formula used to compute this checksum results in an
+** incompatible journal file format.
+**
+** If journal corruption occurs due to a power failure, the most likely
+** scenario is that one end or the other of the record will be changed.
+** It is much less likely that the two ends of the journal record will be
** correct and the middle be corrupt. Thus, this "checksum" scheme,
** though fast and simple, catches the mostly likely kind of corruption.
-**
-** FIX ME: Consider adding every 200th (or so) byte of the data to the
-** checksum. That way if a single page spans 3 or more disk sectors and
-** only the middle sector is corrupt, we will still have a reasonable
-** chance of failing the checksum and thus detecting the problem.
*/
static u32 pager_cksum(Pager *pPager, const u8 *aData){
- u32 cksum = pPager->cksumInit;
- int i = pPager->pageSize-200;
+ u32 cksum = pPager->cksumInit; /* Checksum value to return */
+ int i = pPager->pageSize-200; /* Loop counter */
while( i>0 ){
cksum += aData[i];
i -= 200;
/*
** Read a single page from either the journal file (if isMainJrnl==1) or
** from the sub-journal (if isMainJrnl==0) and playback that page.
-** The page begins at offset *pOffset into the file. The *pOffset
+** The page begins at offset *pOffset into the file. The *pOffset
** value is increased to the start of the next page in the journal.
**
** The isMainJrnl flag is true if this is the main rollback journal and
** false for the statement journal. The main rollback journal uses
** checksums - the statement journal does not.
**
+** If the page number of the page record read from the (sub-)journal file
+** is greater than the current value of Pager.dbSize, then playback is
+** skipped and SQLITE_OK is returned.
+**
** If pDone is not NULL, then it is a record of pages that have already
** been played back. If the page at *pOffset has already been played back
** (if the corresponding pDone bit is set) then skip the playback.
** Make sure the pDone bit corresponding to the *pOffset page is set
** prior to returning.
+**
+** If the page record is successfully read from the (sub-)journal file
+** and played back, then SQLITE_OK is returned. If an IO error occurs
+** while reading the record from the (sub-)journal file or while writing
+** to the database file, then the IO error code is returned. If data
+** is successfully read from the (sub-)journal file but appears to be
+** corrupted, SQLITE_DONE is returned. Data is considered corrupted in
+** two circumstances:
+**
+** * If the record page-number is illegal (0 or PAGER_MJ_PGNO), or
+** * If the record is being rolled back from the main journal file
+** and the checksum field does not match the record content.
+**
+** Neither of these two scenarios are possible during a savepoint rollback.
+**
+** If this is a savepoint rollback, then memory may have to be dynamically
+** allocated by this function. If this is the case and an allocation fails,
+** SQLITE_NOMEM is returned.
*/
static int pager_playback_one_page(
Pager *pPager, /* The pager being played back */
int isMainJrnl, /* 1 -> main journal. 0 -> sub-journal. */
+ int isUnsync, /* True if reading from unsynced main journal */
i64 *pOffset, /* Offset of record to playback */
int isSavepnt, /* True for a savepoint rollback */
Bitvec *pDone /* Bitvec of pages already played back */
aData = (u8*)pPager->pTmpSpace;
assert( aData ); /* Temp storage must have already been allocated */
+ /* Read the page number and page data from the journal or sub-journal
+ ** file. Return an error code to the caller if an IO error occurs.
+ */
jfd = isMainJrnl ? pPager->jfd : pPager->sjfd;
-
rc = read32bits(jfd, *pOffset, &pgno);
if( rc!=SQLITE_OK ) return rc;
rc = sqlite3OsRead(jfd, aData, pPager->pageSize, (*pOffset)+4);
** detect this invalid data (with high probability) and ignore it.
*/
if( pgno==0 || pgno==PAGER_MJ_PGNO(pPager) ){
+ assert( !isSavepnt );
return SQLITE_DONE;
}
if( pgno>(Pgno)pPager->dbSize || sqlite3BitvecTest(pDone, pgno) ){
return SQLITE_DONE;
}
}
- if( pDone && (rc = sqlite3BitvecSet(pDone, pgno)) ){
+
+ if( pDone && (rc = sqlite3BitvecSet(pDone, pgno))!=SQLITE_OK ){
return rc;
}
));
if( (pPager->state>=PAGER_EXCLUSIVE)
&& (pPg==0 || 0==(pPg->flags&PGHDR_NEED_SYNC))
- && (pPager->fd->pMethods)
+ && isOpen(pPager->fd)
+ && !isUnsync
){
i64 ofst = (pgno-1)*(i64)pPager->pageSize;
rc = sqlite3OsWrite(pPager->fd, aData, pPager->pageSize, ofst);
if( pgno>pPager->dbFileSize ){
pPager->dbFileSize = pgno;
}
+ sqlite3BackupUpdate(pPager->pBackup, pgno, aData);
}else if( !isMainJrnl && pPg==0 ){
/* If this is a rollback of a savepoint and data was not written to
** the database and the page is not in-memory, there is a potential
** requiring a journal-sync before it is written.
*/
assert( isSavepnt );
- if( (rc = sqlite3PagerAcquire(pPager, pgno, &pPg, 1)) ){
+ if( (rc = sqlite3PagerAcquire(pPager, pgno, &pPg, 1))!=SQLITE_OK ){
return rc;
}
pPg->flags &= ~PGHDR_NEED_READ;
if( pPager->xReiniter ){
pPager->xReiniter(pPg);
}
- if( isMainJrnl && (!isSavepnt || pPager->journalOff<=pPager->journalHdr) ){
+ if( isMainJrnl && (!isSavepnt || *pOffset<=pPager->journalHdr) ){
/* If the contents of this page were just restored from the main
** journal file, then its content must be as they were when the
** transaction was first opened. In this case we can mark the page
** Argument zMaster may point to Pager.pTmpSpace. So that buffer is not
** available for use within this function.
**
+** When a master journal file is created, it is populated with the names
+** of all of its child journals, one after another, formatted as utf-8
+** encoded text. The end of each child journal file is marked with a
+** nul-terminator byte (0x00). i.e. the entire contents of a master journal
+** file for a transaction involving two databases might be:
+**
+** "/home/bill/a.db-journal\x00/home/bill/b.db-journal\x00"
+**
+** A master journal file may only be deleted once all of its child
+** journals have been rolled back.
+**
+** This function reads the contents of the master-journal file into
+** memory and loops through each of the child journal names. For
+** each child journal, it checks if:
+**
+** * if the child journal exists, and if so
+** * if the child journal contains a reference to master journal
+** file zMaster
**
-** The master journal file contains the names of all child journals.
-** To tell if a master journal can be deleted, check to each of the
-** children. If all children are either missing or do not refer to
-** a different master journal, then this master journal can be deleted.
+** If a child journal can be found that matches both of the criteria
+** above, this function returns without doing anything. Otherwise, if
+** no such child journal can be found, file zMaster is deleted from
+** the file-system using sqlite3OsDelete().
+**
+** If an IO error within this function, an error code is returned. This
+** function allocates memory by calling sqlite3Malloc(). If an allocation
+** fails, SQLITE_NOMEM is returned. Otherwise, if no IO or malloc errors
+** occur, SQLITE_OK is returned.
+**
+** TODO: This function allocates a single block of memory to load
+** the entire contents of the master journal file. This could be
+** a couple of kilobytes or so - potentially larger than the page
+** size.
*/
static int pager_delmaster(Pager *pPager, const char *zMaster){
sqlite3_vfs *pVfs = pPager->pVfs;
- int rc;
- int master_open = 0;
- sqlite3_file *pMaster;
- sqlite3_file *pJournal;
+ int rc; /* Return code */
+ sqlite3_file *pMaster; /* Malloc'd master-journal file descriptor */
+ sqlite3_file *pJournal; /* Malloc'd child-journal file descriptor */
char *zMasterJournal = 0; /* Contents of master journal file */
i64 nMasterJournal; /* Size of master journal file */
- /* Open the master journal file exclusively in case some other process
- ** is running this routine also. Not that it makes too much difference.
+ /* Allocate space for both the pJournal and pMaster file descriptors.
+ ** If successful, open the master journal file for reading.
*/
- pMaster = (sqlite3_file *)sqlite3Malloc(pVfs->szOsFile * 2);
+ pMaster = (sqlite3_file *)sqlite3MallocZero(pVfs->szOsFile * 2);
pJournal = (sqlite3_file *)(((u8 *)pMaster) + pVfs->szOsFile);
if( !pMaster ){
rc = SQLITE_NOMEM;
}else{
- int flags = (SQLITE_OPEN_READONLY|SQLITE_OPEN_MASTER_JOURNAL);
+ const int flags = (SQLITE_OPEN_READONLY|SQLITE_OPEN_MASTER_JOURNAL);
rc = sqlite3OsOpen(pVfs, zMaster, pMaster, flags, 0);
}
if( rc!=SQLITE_OK ) goto delmaster_out;
- master_open = 1;
rc = sqlite3OsFileSize(pMaster, &nMasterJournal);
if( rc!=SQLITE_OK ) goto delmaster_out;
if( nMasterJournal>0 ){
char *zJournal;
char *zMasterPtr = 0;
- int nMasterPtr = pPager->pVfs->mxPathname+1;
+ int nMasterPtr = pVfs->mxPathname+1;
/* Load the entire master journal file into space obtained from
** sqlite3_malloc() and pointed to by zMasterJournal.
if( zMasterJournal ){
sqlite3_free(zMasterJournal);
}
- if( master_open ){
+ if( pMaster ){
sqlite3OsClose(pMaster);
+ assert( !isOpen(pJournal) );
}
sqlite3_free(pMaster);
return rc;
/*
-** If the main database file is open and an exclusive lock is held,
-** truncate the main file of the given pager to the specified number
-** of pages.
+** This function is used to change the actual size of the database
+** file in the file-system. This only happens when committing a transaction,
+** or rolling back a transaction (including rolling back a hot-journal).
**
-** It might might be the case that the file on disk is smaller than nPage.
-** This can happen, for example, if we are in the middle of a transaction
-** which has extended the file size and the new pages are still all held
-** in cache, then an INSERT or UPDATE does a statement rollback. Some
-** operating system implementations can get confused if you try to
-** truncate a file to some size that is larger than it currently is,
-** so detect this case and write a single zero byte to the end of the new
-** file instead.
+** If the main database file is not open, or an exclusive lock is not
+** held, this function is a no-op. Otherwise, the size of the file is
+** changed to nPage pages (nPage*pPager->pageSize bytes). If the file
+** on disk is currently larger than nPage pages, then use the VFS
+** xTruncate() method to truncate it.
+**
+** Or, it might might be the case that the file on disk is smaller than
+** nPage pages. Some operating system implementations can get confused if
+** you try to truncate a file to some size that is larger than it
+** currently is, so detect this case and write a single zero byte to
+** the end of the new file instead.
+**
+** If successful, return SQLITE_OK. If an IO error occurs while modifying
+** the database file, return the error code to the caller.
*/
static int pager_truncate(Pager *pPager, Pgno nPage){
int rc = SQLITE_OK;
- if( pPager->state>=PAGER_EXCLUSIVE && pPager->fd->pMethods ){
+ if( pPager->state>=PAGER_EXCLUSIVE && isOpen(pPager->fd) ){
i64 currentSize, newSize;
+ /* TODO: Is it safe to use Pager.dbFileSize here? */
rc = sqlite3OsFileSize(pPager->fd, ¤tSize);
newSize = pPager->pageSize*(i64)nPage;
if( rc==SQLITE_OK && currentSize!=newSize ){
}
/*
-** Set the sectorSize for the given pager.
+** Set the value of the Pager.sectorSize variable for the given
+** pager based on the value returned by the xSectorSize method
+** of the open database file. The sector size will be used used
+** to determine the size and alignment of journal header and
+** master journal pointers within created journal files.
+**
+** For temporary files the effective sector size is always 512 bytes.
**
-** The sector size is at least as big as the sector size reported
-** by sqlite3OsSectorSize(). The minimum sector size is 512.
+** Otherwise, for non-temporary files, the effective sector size is
+** the value returned by the xSectorSize() method rounded up to 512 if
+** it is less than 512, or rounded down to MAX_SECTOR_SIZE if it
+** is greater than MAX_SECTOR_SIZE.
*/
static void setSectorSize(Pager *pPager){
- assert(pPager->fd->pMethods||pPager->tempFile);
+ assert( isOpen(pPager->fd) || pPager->tempFile );
+
if( !pPager->tempFile ){
/* Sector size doesn't matter for temporary files. Also, the file
- ** may not have been opened yet, in whcih case the OsSectorSize()
+ ** may not have been opened yet, in which case the OsSectorSize()
** call will segfault.
*/
pPager->sectorSize = sqlite3OsSectorSize(pPager->fd);
pPager->sectorSize = 512;
}
if( pPager->sectorSize>MAX_SECTOR_SIZE ){
+ assert( MAX_SECTOR_SIZE>=512 );
pPager->sectorSize = MAX_SECTOR_SIZE;
}
}
**
** If an I/O or malloc() error occurs, the journal-file is not deleted
** and an error code is returned.
+**
+** The isHot parameter indicates that we are trying to rollback a journal
+** that might be a hot journal. Or, it could be that the journal is
+** preserved because of JOURNALMODE_PERSIST or JOURNALMODE_TRUNCATE.
+** If the journal really is hot, reset the pager cache prior rolling
+** back any content. If the journal is merely persistent, no reset is
+** needed.
*/
static int pager_playback(Pager *pPager, int isHot){
sqlite3_vfs *pVfs = pPager->pVfs;
int rc; /* Result code of a subroutine */
int res = 1; /* Value returned by sqlite3OsAccess() */
char *zMaster = 0; /* Name of master journal file if any */
+ int needPagerReset; /* True to reset page prior to first page rollback */
/* Figure out how many records are in the journal. Abort early if
** the journal is empty.
*/
- assert( pPager->journalOpen );
+ assert( isOpen(pPager->jfd) );
rc = sqlite3OsFileSize(pPager->jfd, &szJ);
if( rc!=SQLITE_OK || szJ==0 ){
goto end_playback;
** If a master journal file name is specified, but the file is not
** present on disk, then the journal is not hot and does not need to be
** played back.
+ **
+ ** TODO: Technically the following is an error because it assumes that
+ ** buffer Pager.pTmpSpace is (mxPathname+1) bytes or larger. i.e. that
+ ** (pPager->pageSize >= pPager->pVfs->mxPathname+1). Using os_unix.c,
+ ** mxPathname is 512, which is the same as the minimum allowable value
+ ** for pageSize.
*/
zMaster = pPager->pTmpSpace;
rc = readMasterJournal(pPager->jfd, zMaster, pPager->pVfs->mxPathname+1);
goto end_playback;
}
pPager->journalOff = 0;
+ needPagerReset = isHot;
- /* This loop terminates either when the readJournalHdr() call returns
- ** SQLITE_DONE or an IO error occurs. */
+ /* This loop terminates either when a readJournalHdr() or
+ ** pager_playback_one_page() call returns SQLITE_DONE or an IO error
+ ** occurs.
+ */
while( 1 ){
+ int isUnsync = 0;
/* Read the next journal header from the journal file. If there are
** not enough bytes left in the journal file for a complete header, or
if( nRec==0 && !isHot &&
pPager->journalHdr+JOURNAL_HDR_SZ(pPager)==pPager->journalOff ){
nRec = (int)((szJ - pPager->journalOff) / JOURNAL_PG_SZ(pPager));
+ isUnsync = 1;
}
/* If this is the first header read from the journal, truncate the
pPager->dbSize = mxPg;
}
- /* Copy original pages out of the journal and back into the database file.
+ /* Copy original pages out of the journal and back into the
+ ** database file and/or page cache.
*/
for(u=0; u<nRec; u++){
- rc = pager_playback_one_page(pPager, 1, &pPager->journalOff, 0, 0);
+ if( needPagerReset ){
+ pager_reset(pPager);
+ needPagerReset = 0;
+ }
+ rc = pager_playback_one_page(pPager,1,isUnsync,&pPager->journalOff,0,0);
if( rc!=SQLITE_OK ){
if( rc==SQLITE_DONE ){
rc = SQLITE_OK;
sqlite3OsFileControl(pPager->fd,SQLITE_FCNTL_DB_UNCHANGED,0)>=SQLITE_OK
);
+ /* If this playback is happening automatically as a result of an IO or
+ ** malloc error that occured after the change-counter was updated but
+ ** before the transaction was committed, then the change-counter
+ ** modification may just have been reverted. If this happens in exclusive
+ ** mode, then subsequent transactions performed by the connection will not
+ ** update the change-counter at all. This may lead to cache inconsistency
+ ** problems for other processes at some point in the future. So, just
+ ** in case this has happened, clear the changeCountDone flag now.
+ */
+ pPager->changeCountDone = pPager->tempFile;
+
if( rc==SQLITE_OK ){
zMaster = pPager->pTmpSpace;
rc = readMasterJournal(pPager->jfd, zMaster, pPager->pVfs->mxPathname+1);
+ testcase( rc!=SQLITE_OK );
}
if( rc==SQLITE_OK ){
rc = pager_end_transaction(pPager, zMaster[0]!='\0');
+ testcase( rc!=SQLITE_OK );
}
if( rc==SQLITE_OK && zMaster[0] && res ){
/* If there was a master journal and this routine will return success,
** see if it is possible to delete the master journal.
*/
rc = pager_delmaster(pPager, zMaster);
+ testcase( rc!=SQLITE_OK );
}
/* The Pager.sectorSize variable may have been updated while rolling
}
/*
-** Playback savepoint pSavepoint. Or, if pSavepoint==NULL, then playback
-** the entire master journal file.
+** Playback savepoint pSavepoint. Or, if pSavepoint==NULL, then playback
+** the entire master journal file. The case pSavepoint==NULL occurs when
+** a ROLLBACK TO command is invoked on a SAVEPOINT that is a transaction
+** savepoint.
+**
+** When pSavepoint is not NULL (meaning a non-transaction savepoint is
+** being rolled back), then the rollback consists of up to three stages,
+** performed in the order specified:
+**
+** * Pages are played back from the main journal starting at byte
+** offset PagerSavepoint.iOffset and continuing to
+** PagerSavepoint.iHdrOffset, or to the end of the main journal
+** file if PagerSavepoint.iHdrOffset is zero.
+**
+** * If PagerSavepoint.iHdrOffset is not zero, then pages are played
+** back starting from the journal header immediately following
+** PagerSavepoint.iHdrOffset to the end of the main journal file.
+**
+** * Pages are then played back from the sub-journal file, starting
+** with the PagerSavepoint.iSubRec and continuing to the end of
+** the journal file.
**
-** The case pSavepoint==NULL occurs when a ROLLBACK TO command is invoked
-** on a SAVEPOINT that is a transaction savepoint.
+** Throughout the rollback process, each time a page is rolled back, the
+** corresponding bit is set in a bitvec structure (variable pDone in the
+** implementation below). This is used to ensure that a page is only
+** rolled back the first time it is encountered in either journal.
+**
+** If pSavepoint is NULL, then pages are only played back from the main
+** journal file. There is no need for a bitvec in this case.
+**
+** In either case, before playback commences the Pager.dbSize variable
+** is reset to the value that it held at the start of the savepoint
+** (or transaction). No page with a page-number greater than this value
+** is played back. If one is encountered it is simply skipped.
*/
static int pagerPlaybackSavepoint(Pager *pPager, PagerSavepoint *pSavepoint){
i64 szJ; /* Effective size of the main journal */
i64 iHdrOff; /* End of first segment of main-journal records */
- Pgno ii; /* Loop counter */
int rc = SQLITE_OK; /* Return code */
Bitvec *pDone = 0; /* Bitvec to ensure pages played back only once */
+ assert( pPager->state>=PAGER_SHARED );
+
/* Allocate a bitvec to use to store the set of pages rolled back */
if( pSavepoint ){
pDone = sqlite3BitvecCreate(pSavepoint->nOrig);
}
}
- /* Truncate the database back to the size it was before the
- ** savepoint being reverted was opened.
+ /* Set the database size back to the value it was before the savepoint
+ ** being reverted was opened.
*/
pPager->dbSize = pSavepoint ? pSavepoint->nOrig : pPager->dbOrigSize;
- assert( pPager->state>=PAGER_SHARED );
/* Use pPager->journalOff as the effective size of the main rollback
** journal. The actual file might be larger than this in
iHdrOff = pSavepoint->iHdrOffset ? pSavepoint->iHdrOffset : szJ;
pPager->journalOff = pSavepoint->iOffset;
while( rc==SQLITE_OK && pPager->journalOff<iHdrOff ){
- rc = pager_playback_one_page(pPager, 1, &pPager->journalOff, 1, pDone);
- assert( rc!=SQLITE_DONE );
+ rc = pager_playback_one_page(pPager, 1, 0, &pPager->journalOff, 1, pDone);
}
+ assert( rc!=SQLITE_DONE );
}else{
pPager->journalOff = 0;
}
** continue adding pages rolled back to pDone.
*/
while( rc==SQLITE_OK && pPager->journalOff<szJ ){
+ u32 ii; /* Loop counter */
u32 nJRec = 0; /* Number of Journal Records */
u32 dummy;
rc = readJournalHdr(pPager, szJ, &nJRec, &dummy);
if( nJRec==0
&& pPager->journalHdr+JOURNAL_HDR_SZ(pPager)==pPager->journalOff
){
- nJRec = (szJ - pPager->journalOff)/JOURNAL_PG_SZ(pPager);
+ nJRec = (u32)((szJ - pPager->journalOff)/JOURNAL_PG_SZ(pPager));
}
for(ii=0; rc==SQLITE_OK && ii<nJRec && pPager->journalOff<szJ; ii++){
- rc = pager_playback_one_page(pPager, 1, &pPager->journalOff, 1, pDone);
- assert( rc!=SQLITE_DONE );
+ rc = pager_playback_one_page(pPager, 1, 0, &pPager->journalOff, 1, pDone);
}
+ assert( rc!=SQLITE_DONE );
}
assert( rc!=SQLITE_OK || pPager->journalOff==szJ );
** will be skipped. Out-of-range pages are also skipped.
*/
if( pSavepoint ){
+ u32 ii; /* Loop counter */
i64 offset = pSavepoint->iSubRec*(4+pPager->pageSize);
- for(ii=pSavepoint->iSubRec; rc==SQLITE_OK&&ii<(u32)pPager->stmtNRec; ii++){
- assert( offset == ii*(4+pPager->pageSize) );
- rc = pager_playback_one_page(pPager, 0, &offset, 1, pDone);
- assert( rc!=SQLITE_DONE );
+ for(ii=pSavepoint->iSubRec; rc==SQLITE_OK && ii<pPager->nSubRec; ii++){
+ assert( offset==ii*(4+pPager->pageSize) );
+ rc = pager_playback_one_page(pPager, 0, 0, &offset, 1, pDone);
}
+ assert( rc!=SQLITE_DONE );
}
sqlite3BitvecDestroy(pDone);
#endif
/*
-** Open a temporary file.
+** Open a temporary file.
+**
+** Write the file descriptor into *pFile. Return SQLITE_OK on success
+** or some other error code if we fail. The OS will automatically
+** delete the temporary file when it is closed.
**
-** Write the file descriptor into *fd. Return SQLITE_OK on success or some
-** other error code if we fail. The OS will automatically delete the temporary
-** file when it is closed.
+** The flags passed to the VFS layer xOpen() call are those specified
+** by parameter vfsFlags ORed with the following:
+**
+** SQLITE_OPEN_READWRITE
+** SQLITE_OPEN_CREATE
+** SQLITE_OPEN_EXCLUSIVE
+** SQLITE_OPEN_DELETEONCLOSE
*/
-static int sqlite3PagerOpentemp(
+static int pagerOpentemp(
Pager *pPager, /* The pager object */
sqlite3_file *pFile, /* Write the file descriptor here */
int vfsFlags /* Flags passed through to the VFS */
){
- int rc;
+ int rc; /* Return code */
#ifdef SQLITE_TEST
sqlite3_opentemp_count++; /* Used for testing and analysis only */
vfsFlags |= SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE |
SQLITE_OPEN_EXCLUSIVE | SQLITE_OPEN_DELETEONCLOSE;
rc = sqlite3OsOpen(pPager->pVfs, 0, pFile, vfsFlags, 0);
- assert( rc!=SQLITE_OK || pFile->pMethods );
+ assert( rc!=SQLITE_OK || isOpen(pFile) );
return rc;
}
-static int pagerStress(void *,PgHdr *);
-
/*
-** Create a new page cache and put a pointer to the page cache in *ppPager.
-** The file to be cached need not exist. The file is not locked until
-** the first call to sqlite3PagerGet() and is only held open until the
-** last page is released using sqlite3PagerUnref().
+** Set the busy handler function.
**
-** If zFilename is NULL then a randomly-named temporary file is created
-** and used as the file to be cached. The file will be deleted
-** automatically when it is closed.
+** The pager invokes the busy-handler if sqlite3OsLock() returns
+** SQLITE_BUSY when trying to upgrade from no-lock to a SHARED lock,
+** or when trying to upgrade from a RESERVED lock to an EXCLUSIVE
+** lock. It does *not* invoke the busy handler when upgrading from
+** SHARED to RESERVED, or when upgrading from SHARED to EXCLUSIVE
+** (which occurs during hot-journal rollback). Summary:
**
-** If zFilename is ":memory:" then all information is held in cache.
-** It is never written to disk. This can be used to implement an
-** in-memory database.
-*/
-SQLITE_PRIVATE int sqlite3PagerOpen(
- sqlite3_vfs *pVfs, /* The virtual file system to use */
- Pager **ppPager, /* Return the Pager structure here */
- const char *zFilename, /* Name of the database file to open */
- int nExtra, /* Extra bytes append to each in-memory page */
- int flags, /* flags controlling this file */
- int vfsFlags /* flags passed through to sqlite3_vfs.xOpen() */
-){
- u8 *pPtr;
- Pager *pPager = 0;
- int rc = SQLITE_OK;
- int i;
- int tempFile = 0;
- int memDb = 0;
- int readOnly = 0;
- int useJournal = (flags & PAGER_OMIT_JOURNAL)==0;
- int noReadlock = (flags & PAGER_NO_READLOCK)!=0;
- int journalFileSize;
- int pcacheSize = sqlite3PcacheSize();
- int szPageDflt = SQLITE_DEFAULT_PAGE_SIZE;
- char *zPathname = 0;
- int nPathname = 0;
-
- if( sqlite3JournalSize(pVfs)>sqlite3MemJournalSize() ){
- journalFileSize = sqlite3JournalSize(pVfs);
- }else{
- journalFileSize = sqlite3MemJournalSize();
- }
-
- /* The default return is a NULL pointer */
- *ppPager = 0;
-
- /* Compute and store the full pathname in an allocated buffer pointed
- ** to by zPathname, length nPathname. Or, if this is a temporary file,
- ** leave both nPathname and zPathname set to 0.
- */
- if( zFilename && zFilename[0] ){
- nPathname = pVfs->mxPathname+1;
- zPathname = sqlite3Malloc(nPathname*2);
- if( zPathname==0 ){
- return SQLITE_NOMEM;
- }
-#ifndef SQLITE_OMIT_MEMORYDB
- if( strcmp(zFilename,":memory:")==0 ){
- memDb = 1;
- zPathname[0] = 0;
- }else
-#endif
- {
- rc = sqlite3OsFullPathname(pVfs, zFilename, nPathname, zPathname);
- }
- if( rc!=SQLITE_OK ){
- sqlite3_free(zPathname);
- return rc;
- }
- nPathname = sqlite3Strlen30(zPathname);
- }
-
- /* Allocate memory for the pager structure */
- pPager = sqlite3MallocZero(
- sizeof(*pPager) + /* Pager structure */
- pcacheSize + /* PCache object */
- journalFileSize + /* The journal file structure */
- pVfs->szOsFile + /* The main db file */
- journalFileSize * 2 + /* The two journal files */
- 3*nPathname + 40 /* zFilename, zDirectory, zJournal */
- );
- if( !pPager ){
- sqlite3_free(zPathname);
- return SQLITE_NOMEM;
- }
- pPager->pPCache = (PCache *)&pPager[1];
- pPtr = ((u8 *)&pPager[1]) + pcacheSize;
- pPager->vfsFlags = vfsFlags;
- pPager->fd = (sqlite3_file*)&pPtr[pVfs->szOsFile*0];
- pPager->sjfd = (sqlite3_file*)&pPtr[pVfs->szOsFile];
- pPager->jfd = (sqlite3_file*)&pPtr[pVfs->szOsFile+journalFileSize];
- pPager->zFilename = (char*)&pPtr[pVfs->szOsFile+2*journalFileSize];
- pPager->zDirectory = &pPager->zFilename[nPathname+1];
- pPager->zJournal = &pPager->zDirectory[nPathname+1];
- pPager->pVfs = pVfs;
- if( zPathname ){
- memcpy(pPager->zFilename, zPathname, nPathname+1);
- sqlite3_free(zPathname);
- }
-
- /* Open the pager file.
- */
- if( zFilename && zFilename[0] && !memDb ){
- if( nPathname>(pVfs->mxPathname - (int)sizeof("-journal")) ){
- rc = SQLITE_CANTOPEN;
- }else{
- int fout = 0;
- rc = sqlite3OsOpen(pVfs, pPager->zFilename, pPager->fd,
- pPager->vfsFlags, &fout);
- readOnly = (fout&SQLITE_OPEN_READONLY);
-
- /* If the file was successfully opened for read/write access,
- ** choose a default page size in case we have to create the
- ** database file. The default page size is the maximum of:
- **
- ** + SQLITE_DEFAULT_PAGE_SIZE,
- ** + The value returned by sqlite3OsSectorSize()
- ** + The largest page size that can be written atomically.
- */
- if( rc==SQLITE_OK && !readOnly ){
- setSectorSize(pPager);
- if( szPageDflt<pPager->sectorSize ){
- szPageDflt = pPager->sectorSize;
- }
-#ifdef SQLITE_ENABLE_ATOMIC_WRITE
- {
- int iDc = sqlite3OsDeviceCharacteristics(pPager->fd);
- int ii;
- assert(SQLITE_IOCAP_ATOMIC512==(512>>8));
- assert(SQLITE_IOCAP_ATOMIC64K==(65536>>8));
- assert(SQLITE_MAX_DEFAULT_PAGE_SIZE<=65536);
- for(ii=szPageDflt; ii<=SQLITE_MAX_DEFAULT_PAGE_SIZE; ii=ii*2){
- if( iDc&(SQLITE_IOCAP_ATOMIC|(ii>>8)) ) szPageDflt = ii;
- }
- }
-#endif
- if( szPageDflt>SQLITE_MAX_DEFAULT_PAGE_SIZE ){
- szPageDflt = SQLITE_MAX_DEFAULT_PAGE_SIZE;
- }
- }
- }
- }else{
- /* If a temporary file is requested, it is not opened immediately.
- ** In this case we accept the default page size and delay actually
- ** opening the file until the first call to OsWrite().
- **
- ** This branch is also run for an in-memory database. An in-memory
- ** database is the same as a temp-file that is never written out to
- ** disk and uses an in-memory rollback journal.
- */
- tempFile = 1;
- pPager->state = PAGER_EXCLUSIVE;
- }
-
- if( pPager && rc==SQLITE_OK ){
- pPager->pTmpSpace = sqlite3PageMalloc(szPageDflt);
- }
-
- /* If an error occured in either of the blocks above.
- ** Free the Pager structure and close the file.
- ** Since the pager is not allocated there is no need to set
- ** any Pager.errMask variables.
- */
- if( !pPager || !pPager->pTmpSpace ){
- sqlite3OsClose(pPager->fd);
- sqlite3_free(pPager);
- return ((rc==SQLITE_OK)?SQLITE_NOMEM:rc);
- }
- nExtra = FORCE_ALIGNMENT(nExtra);
- sqlite3PcacheOpen(szPageDflt, nExtra, !memDb,
- !memDb?pagerStress:0, (void *)pPager, pPager->pPCache);
-
- PAGERTRACE(("OPEN %d %s\n", FILEHANDLEID(pPager->fd), pPager->zFilename));
- IOTRACE(("OPEN %p %s\n", pPager, pPager->zFilename))
-
- /* Fill in Pager.zDirectory[] */
- memcpy(pPager->zDirectory, pPager->zFilename, nPathname+1);
- for(i=sqlite3Strlen30(pPager->zDirectory);
- i>0 && pPager->zDirectory[i-1]!='/'; i--){}
- if( i>0 ) pPager->zDirectory[i-1] = 0;
-
- /* Fill in Pager.zJournal[] */
- if( zPathname ){
- memcpy(pPager->zJournal, pPager->zFilename, nPathname);
- memcpy(&pPager->zJournal[nPathname], "-journal", 9);
- }else{
- pPager->zJournal = 0;
- }
-
- /* pPager->journalOpen = 0; */
- pPager->useJournal = (u8)useJournal;
- pPager->noReadlock = (noReadlock && readOnly) ?1:0;
- /* pPager->stmtOpen = 0; */
- /* pPager->stmtInUse = 0; */
- /* pPager->nRef = 0; */
- pPager->dbSizeValid = (u8)memDb;
- pPager->pageSize = szPageDflt;
- /* pPager->stmtSize = 0; */
- /* pPager->stmtJSize = 0; */
- /* pPager->nPage = 0; */
- pPager->mxPage = 100;
- pPager->mxPgno = SQLITE_MAX_PAGE_COUNT;
- /* pPager->state = PAGER_UNLOCK; */
- assert( pPager->state == (tempFile ? PAGER_EXCLUSIVE : PAGER_UNLOCK) );
- /* pPager->errMask = 0; */
- pPager->tempFile = (u8)tempFile;
- assert( tempFile==PAGER_LOCKINGMODE_NORMAL
- || tempFile==PAGER_LOCKINGMODE_EXCLUSIVE );
- assert( PAGER_LOCKINGMODE_EXCLUSIVE==1 );
- pPager->exclusiveMode = (u8)tempFile;
- pPager->memDb = (u8)memDb;
- pPager->readOnly = (u8)readOnly;
- /* pPager->needSync = 0; */
- pPager->noSync = (pPager->tempFile || !useJournal) ?1:0;
- pPager->fullSync = pPager->noSync ?0:1;
- pPager->sync_flags = SQLITE_SYNC_NORMAL;
- /* pPager->pFirst = 0; */
- /* pPager->pFirstSynced = 0; */
- /* pPager->pLast = 0; */
- pPager->nExtra = nExtra;
- pPager->journalSizeLimit = SQLITE_DEFAULT_JOURNAL_SIZE_LIMIT;
- assert(pPager->fd->pMethods||tempFile);
- setSectorSize(pPager);
- if( memDb ){
- pPager->journalMode = PAGER_JOURNALMODE_MEMORY;
- }
- /* pPager->xBusyHandler = 0; */
- /* pPager->pBusyHandlerArg = 0; */
- /* memset(pPager->aHash, 0, sizeof(pPager->aHash)); */
- *ppPager = pPager;
- return SQLITE_OK;
-}
-
-/*
-** Set the busy handler function.
+** Transition | Invokes xBusyHandler
+** --------------------------------------------------------
+** NO_LOCK -> SHARED_LOCK | Yes
+** SHARED_LOCK -> RESERVED_LOCK | No
+** SHARED_LOCK -> EXCLUSIVE_LOCK | No
+** RESERVED_LOCK -> EXCLUSIVE_LOCK | Yes
+**
+** If the busy-handler callback returns non-zero, the lock is
+** retried. If it returns zero, then the SQLITE_BUSY error is
+** returned to the caller of the pager API function.
*/
SQLITE_PRIVATE void sqlite3PagerSetBusyhandler(
- Pager *pPager,
- int (*xBusyHandler)(void *),
- void *pBusyHandlerArg
+ Pager *pPager, /* Pager object */
+ int (*xBusyHandler)(void *), /* Pointer to busy-handler function */
+ void *pBusyHandlerArg /* Argument to pass to xBusyHandler */
){
pPager->xBusyHandler = xBusyHandler;
pPager->pBusyHandlerArg = pBusyHandlerArg;
}
/*
-** Set the reinitializer for this pager. If not NULL, the reinitializer
-** is called when the content of a page in cache is restored to its original
-** value as a result of a rollback. The callback gives higher-level code
-** an opportunity to restore the EXTRA section to agree with the restored
-** page data.
+** Set the reinitializer for this pager. If not NULL, the reinitializer
+** is called when the content of a page in cache is modified (restored)
+** as part of a transaction or savepoint rollback. The callback gives
+** higher-level code an opportunity to restore the EXTRA section to
+** agree with the restored page data.
*/
SQLITE_PRIVATE void sqlite3PagerSetReiniter(Pager *pPager, void (*xReinit)(DbPage*)){
pPager->xReiniter = xReinit;
}
/*
-** Set the page size to *pPageSize. If the suggest new page size is
-** inappropriate, then an alternative page size is set to that
-** value before returning.
+** Change the page size used by the Pager object. The new page size
+** is passed in *pPageSize.
+**
+** If the pager is in the error state when this function is called, it
+** is a no-op. The value returned is the error state error code (i.e.
+** one of SQLITE_IOERR, SQLITE_CORRUPT or SQLITE_FULL).
+**
+** Otherwise, if all of the following are true:
+**
+** * the new page size (value of *pPageSize) is valid (a power
+** of two between 512 and SQLITE_MAX_PAGE_SIZE, inclusive), and
+**
+** * there are no outstanding page references, and
+**
+** * the database is either not an in-memory database or it is
+** an in-memory database that currently consists of zero pages.
+**
+** then the pager object page size is set to *pPageSize.
+**
+** If the page size is changed, then this function uses sqlite3PagerMalloc()
+** to obtain a new Pager.pTmpSpace buffer. If this allocation attempt
+** fails, SQLITE_NOMEM is returned and the page size remains unchanged.
+** In all other cases, SQLITE_OK is returned.
+**
+** If the page size is not changed, either because one of the enumerated
+** conditions above is not true, the pager was in error state when this
+** function was called, or because the memory allocation attempt failed,
+** then *pPageSize is set to the old, retained page size before returning.
*/
SQLITE_PRIVATE int sqlite3PagerSetPagesize(Pager *pPager, u16 *pPageSize){
int rc = pPager->errCode;
}else{
pager_reset(pPager);
pPager->pageSize = pageSize;
- if( !pPager->memDb ) setSectorSize(pPager);
sqlite3PageFree(pPager->pTmpSpace);
pPager->pTmpSpace = pNew;
sqlite3PcacheSetPageSize(pPager->pPCache, pageSize);
** Read the first N bytes from the beginning of the file into memory
** that pDest points to.
**
-** No error checking is done. The rational for this is that this function
-** may be called even if the file does not exist or contain a header. In
-** these cases sqlite3OsRead() will return an error, to which the correct
-** response is to zero the memory at pDest and continue. A real IO error
-** will presumably recur and be picked up later (Todo: Think about this).
+** If the pager was opened on a transient file (zFilename==""), or
+** opened on a file less than N bytes in size, the output buffer is
+** zeroed and SQLITE_OK returned. The rationale for this is that this
+** function is used to read database headers, and a new transient or
+** zero sized database has a header than consists entirely of zeroes.
+**
+** If any IO error apart from SQLITE_IOERR_SHORT_READ is encountered,
+** the error code is returned to the caller and the contents of the
+** output buffer undefined.
*/
SQLITE_PRIVATE int sqlite3PagerReadFileheader(Pager *pPager, int N, unsigned char *pDest){
int rc = SQLITE_OK;
memset(pDest, 0, N);
- assert(pPager->fd->pMethods||pPager->tempFile);
- if( pPager->fd->pMethods ){
+ assert( isOpen(pPager->fd) || pPager->tempFile );
+ if( isOpen(pPager->fd) ){
IOTRACE(("DBHDR %p 0 %d\n", pPager, N))
rc = sqlite3OsRead(pPager->fd, pDest, N, 0);
if( rc==SQLITE_IOERR_SHORT_READ ){
}
/*
-** Return the total number of pages in the disk file associated with
-** pPager.
+** Return the total number of pages in the database file associated
+** with pPager. Normally, this is calculated as (<db file size>/<page-size>).
+** However, if the file is between 1 and <page-size> bytes in size, then
+** this is considered a 1 page file.
+**
+** If the pager is in error state when this function is called, then the
+** error state error code is returned and *pnPage left unchanged. Or,
+** if the file system has to be queried for the size of the file and
+** the query attempt returns an IO error, the IO error code is returned
+** and *pnPage is left unchanged.
**
-** If the PENDING_BYTE lies on the page directly after the end of the
-** file, then consider this page part of the file too. For example, if
-** PENDING_BYTE is byte 4096 (the first byte of page 5) and the size of the
-** file is 4096 bytes, 5 is returned instead of 4.
+** Otherwise, if everything is successful, then SQLITE_OK is returned
+** and *pnPage is set to the number of pages in the database.
*/
SQLITE_PRIVATE int sqlite3PagerPagecount(Pager *pPager, int *pnPage){
- i64 n = 0;
- int rc;
- assert( pPager!=0 );
+ Pgno nPage; /* Value to return via *pnPage */
+
+ /* If the pager is already in the error state, return the error code. */
if( pPager->errCode ){
- rc = pPager->errCode;
- return rc;
+ return pPager->errCode;
}
+
+ /* Determine the number of pages in the file. Store this in nPage. */
if( pPager->dbSizeValid ){
- n = pPager->dbSize;
- } else {
- assert(pPager->fd->pMethods||pPager->tempFile);
- if( (pPager->fd->pMethods)
- && (rc = sqlite3OsFileSize(pPager->fd, &n))!=SQLITE_OK ){
+ nPage = pPager->dbSize;
+ }else{
+ int rc; /* Error returned by OsFileSize() */
+ i64 n = 0; /* File size in bytes returned by OsFileSize() */
+
+ assert( isOpen(pPager->fd) || pPager->tempFile );
+ if( isOpen(pPager->fd) && (0 != (rc = sqlite3OsFileSize(pPager->fd, &n))) ){
pager_error(pPager, rc);
return rc;
}
if( n>0 && n<pPager->pageSize ){
- n = 1;
+ nPage = 1;
}else{
- n /= pPager->pageSize;
+ nPage = (Pgno)(n / pPager->pageSize);
}
if( pPager->state!=PAGER_UNLOCK ){
- pPager->dbSize = (Pgno)n;
- pPager->dbFileSize = (Pgno)n;
+ pPager->dbSize = nPage;
+ pPager->dbFileSize = nPage;
pPager->dbSizeValid = 1;
}
}
- if( n==(PENDING_BYTE/pPager->pageSize) ){
- n++;
- }
- if( n>pPager->mxPgno ){
- pPager->mxPgno = (Pgno)n;
+
+ /* If the current number of pages in the file is greater than the
+ ** configured maximum pager number, increase the allowed limit so
+ ** that the file can be read.
+ */
+ if( nPage>pPager->mxPgno ){
+ pPager->mxPgno = (Pgno)nPage;
}
+
+ /* Set the output variable and return SQLITE_OK */
if( pnPage ){
- *pnPage = (int)n;
+ *pnPage = nPage;
}
return SQLITE_OK;
}
-/*
-** Forward declaration
-*/
-static int syncJournal(Pager*);
/*
-** Try to obtain a lock on a file. Invoke the busy callback if the lock
-** is currently not available. Repeat until the busy callback returns
-** false or until the lock succeeds.
+** Try to obtain a lock of type locktype on the database file. If
+** a similar or greater lock is already held, this function is a no-op
+** (returning SQLITE_OK immediately).
+**
+** Otherwise, attempt to obtain the lock using sqlite3OsLock(). Invoke
+** the busy callback if the lock is currently not available. Repeat
+** until the busy callback returns false or until the attempt to
+** obtain the lock succeeds.
**
** Return SQLITE_OK on success and an error code if we cannot obtain
-** the lock.
+** the lock. If the lock is obtained successfully, set the Pager.state
+** variable to locktype before returning.
*/
static int pager_wait_on_lock(Pager *pPager, int locktype){
- int rc;
+ int rc; /* Return code */
/* The OS lock values must be the same as the Pager lock values */
assert( PAGER_SHARED==SHARED_LOCK );
/* If the file is currently unlocked then the size must be unknown */
assert( pPager->state>=PAGER_SHARED || pPager->dbSizeValid==0 );
+ /* Check that this is either a no-op (because the requested lock is
+ ** already held, or one of the transistions that the busy-handler
+ ** may be invoked during, according to the comment above
+ ** sqlite3PagerSetBusyhandler().
+ */
+ assert( (pPager->state>=locktype)
+ || (pPager->state==PAGER_UNLOCK && locktype==PAGER_SHARED)
+ || (pPager->state==PAGER_RESERVED && locktype==PAGER_EXCLUSIVE)
+ );
+
if( pPager->state>=locktype ){
rc = SQLITE_OK;
}else{
return rc;
}
-#ifndef SQLITE_OMIT_AUTOVACUUM
/*
** Truncate the in-memory database file image to nPage pages. This
** function does not actually modify the database file on disk. It
SQLITE_PRIVATE void sqlite3PagerTruncateImage(Pager *pPager, Pgno nPage){
assert( pPager->dbSizeValid );
assert( pPager->dbSize>=nPage );
+ assert( pPager->state>=PAGER_RESERVED );
pPager->dbSize = nPage;
}
-/*
-** Return the current size of the database file image in pages. This
-** function differs from sqlite3PagerPagecount() in two ways:
-**
-** a) It may only be called when at least one reference to a database
-** page is held. This guarantees that the database size is already
-** known and a call to sqlite3OsFileSize() is not required.
-**
-** b) The return value is not adjusted for the locking page.
-*/
-SQLITE_PRIVATE Pgno sqlite3PagerImageSize(Pager *pPager){
- assert( pPager->dbSizeValid );
- return pPager->dbSize;
-}
-#endif /* ifndef SQLITE_OMIT_AUTOVACUUM */
-
/*
** Shutdown the page cache. Free all memory and close all files.
**
** to the caller.
*/
SQLITE_PRIVATE int sqlite3PagerClose(Pager *pPager){
-
disable_simulated_io_errors();
sqlite3BeginBenignMalloc();
pPager->errCode = 0;
pPager->exclusiveMode = 0;
pager_reset(pPager);
- if( !MEMDB ){
+ if( MEMDB ){
+ pager_unlock(pPager);
+ }else{
/* Set Pager.journalHdr to -1 for the benefit of the pager_playback()
** call which may be made from within pagerUnlockAndRollback(). If it
** is not -1, then the unsynced portion of an open journal file may
pPager->journalHdr = -1;
pagerUnlockAndRollback(pPager);
}
- enable_simulated_io_errors();
sqlite3EndBenignMalloc();
+ enable_simulated_io_errors();
PAGERTRACE(("CLOSE %d\n", PAGERID(pPager)));
IOTRACE(("CLOSE %p\n", pPager))
- if( pPager->journalOpen ){
- sqlite3OsClose(pPager->jfd);
- }
- sqlite3BitvecDestroy(pPager->pInJournal);
- sqlite3BitvecDestroy(pPager->pAlwaysRollback);
- releaseAllSavepoint(pPager);
sqlite3OsClose(pPager->fd);
- /* Temp files are automatically deleted by the OS
- ** if( pPager->tempFile ){
- ** sqlite3OsDelete(pPager->zFilename);
- ** }
- */
-
sqlite3PageFree(pPager->pTmpSpace);
sqlite3PcacheClose(pPager->pPCache);
+
+ assert( !pPager->aSavepoint && !pPager->pInJournal );
+ assert( !isOpen(pPager->jfd) && !isOpen(pPager->sjfd) );
+
sqlite3_free(pPager);
return SQLITE_OK;
}
#if !defined(NDEBUG) || defined(SQLITE_TEST)
/*
-** Return the page number for the given page data.
+** Return the page number for page pPg.
*/
-SQLITE_PRIVATE Pgno sqlite3PagerPagenumber(DbPage *p){
- return p->pgno;
+SQLITE_PRIVATE Pgno sqlite3PagerPagenumber(DbPage *pPg){
+ return pPg->pgno;
}
#endif
/*
-** Increment the reference count for a page. The input pointer is
-** a reference to the page data.
+** Increment the reference count for page pPg.
*/
-SQLITE_PRIVATE int sqlite3PagerRef(DbPage *pPg){
+SQLITE_PRIVATE void sqlite3PagerRef(DbPage *pPg){
sqlite3PcacheRef(pPg);
- return SQLITE_OK;
}
/*
-** Sync the journal. In other words, make sure all the pages that have
+** Sync the journal. In other words, make sure all the pages that have
** been written to the journal have actually reached the surface of the
-** disk. It is not safe to modify the original database file until after
-** the journal has been synced. If the original database is modified before
-** the journal is synced and a power failure occurs, the unsynced journal
-** data would be lost and we would be unable to completely rollback the
-** database changes. Database corruption would occur.
-**
-** This routine also updates the nRec field in the header of the journal.
-** (See comments on the pager_playback() routine for additional information.)
-** If the sync mode is FULL, two syncs will occur. First the whole journal
-** is synced, then the nRec field is updated, then a second sync occurs.
+** disk and can be restored in the event of a hot-journal rollback.
**
-** For temporary databases, we do not care if we are able to rollback
-** after a power failure, so no sync occurs.
+** If the Pager.needSync flag is not set, then this function is a
+** no-op. Otherwise, the actions required depend on the journal-mode
+** and the device characteristics of the the file-system, as follows:
**
-** If the IOCAP_SEQUENTIAL flag is set for the persistent media on which
-** the database is stored, then OsSync() is never called on the journal
-** file. In this case all that is required is to update the nRec field in
-** the journal header.
+** * If the journal file is an in-memory journal file, no action need
+** be taken.
**
-** This routine clears the needSync field of every page current held in
-** memory.
+** * Otherwise, if the device does not support the SAFE_APPEND property,
+** then the nRec field of the most recently written journal header
+** is updated to contain the number of journal records that have
+** been written following it. If the pager is operating in full-sync
+** mode, then the journal file is synced before this field is updated.
+**
+** * If the device does not support the SEQUENTIAL property, then
+** journal file is synced.
+**
+** Or, in pseudo-code:
+**
+** if( NOT <in-memory journal> ){
+** if( NOT SAFE_APPEND ){
+** if( <full-sync mode> ) xSync(<journal file>);
+** <update nRec field>
+** }
+** if( NOT SEQUENTIAL ) xSync(<journal file>);
+** }
+**
+** The Pager.needSync flag is never be set for temporary files, or any
+** file operating in no-sync mode (Pager.noSync set to non-zero).
+**
+** If successful, this routine clears the PGHDR_NEED_SYNC flag of every
+** page currently held in memory before returning SQLITE_OK. If an IO
+** error is encountered, then the IO error code is returned to the caller.
*/
static int syncJournal(Pager *pPager){
- int rc = SQLITE_OK;
-
- /* Sync the journal before modifying the main database
- ** (assuming there is a journal and it needs to be synced.)
- */
if( pPager->needSync ){
assert( !pPager->tempFile );
if( pPager->journalMode!=PAGER_JOURNALMODE_MEMORY ){
- int iDc = sqlite3OsDeviceCharacteristics(pPager->fd);
- assert( pPager->journalOpen );
+ int rc; /* Return code */
+ const int iDc = sqlite3OsDeviceCharacteristics(pPager->fd);
+ assert( isOpen(pPager->jfd) );
if( 0==(iDc&SQLITE_IOCAP_SAFE_APPEND) ){
- i64 jrnlOff = journalHdrOffset(pPager);
- u8 zMagic[8];
+ /* Variable iNRecOffset is set to the offset in the journal file
+ ** of the nRec field of the most recently written journal header.
+ ** This field will be updated following the xSync() operation
+ ** on the journal file. */
+ i64 iNRecOffset = pPager->journalHdr + sizeof(aJournalMagic);
/* This block deals with an obscure problem. If the last connection
** that wrote to this database was operating in persistent-journal
** To work around this, if the journal file does appear to contain
** a valid header following Pager.journalOff, then write a 0x00
** byte to the start of it to prevent it from being recognized.
+ **
+ ** Variable iNextHdrOffset is set to the offset at which this
+ ** problematic header will occur, if it exists. aMagic is used
+ ** as a temporary buffer to inspect the first couple of bytes of
+ ** the potential journal header.
*/
- rc = sqlite3OsRead(pPager->jfd, zMagic, 8, jrnlOff);
- if( rc==SQLITE_OK && 0==memcmp(zMagic, aJournalMagic, 8) ){
+ i64 iNextHdrOffset = journalHdrOffset(pPager);
+ u8 aMagic[8];
+ rc = sqlite3OsRead(pPager->jfd, aMagic, 8, iNextHdrOffset);
+ if( rc==SQLITE_OK && 0==memcmp(aMagic, aJournalMagic, 8) ){
static const u8 zerobyte = 0;
- rc = sqlite3OsWrite(pPager->jfd, &zerobyte, 1, jrnlOff);
+ rc = sqlite3OsWrite(pPager->jfd, &zerobyte, 1, iNextHdrOffset);
}
if( rc!=SQLITE_OK && rc!=SQLITE_IOERR_SHORT_READ ){
return rc;
PAGERTRACE(("SYNC journal of %d\n", PAGERID(pPager)));
IOTRACE(("JSYNC %p\n", pPager))
rc = sqlite3OsSync(pPager->jfd, pPager->sync_flags);
- if( rc!=0 ) return rc;
+ if( rc!=SQLITE_OK ) return rc;
}
-
- jrnlOff = pPager->journalHdr + sizeof(aJournalMagic);
- IOTRACE(("JHDR %p %lld %d\n", pPager, jrnlOff, 4));
- rc = write32bits(pPager->jfd, jrnlOff, pPager->nRec);
- if( rc ) return rc;
+ IOTRACE(("JHDR %p %lld %d\n", pPager, iNRecOffset, 4));
+ rc = write32bits(pPager->jfd, iNRecOffset, pPager->nRec);
+ if( rc!=SQLITE_OK ) return rc;
}
if( 0==(iDc&SQLITE_IOCAP_SEQUENTIAL) ){
PAGERTRACE(("SYNC journal of %d\n", PAGERID(pPager)));
rc = sqlite3OsSync(pPager->jfd, pPager->sync_flags|
(pPager->sync_flags==SQLITE_SYNC_FULL?SQLITE_SYNC_DATAONLY:0)
);
- if( rc!=0 ) return rc;
+ if( rc!=SQLITE_OK ) return rc;
}
- pPager->journalStarted = 1;
}
- pPager->needSync = 0;
- /* Erase the needSync flag from every page.
+ /* The journal file was just successfully synced. Set Pager.needSync
+ ** to zero and clear the PGHDR_NEED_SYNC flag on all pagess.
*/
+ pPager->needSync = 0;
+ pPager->journalStarted = 1;
sqlite3PcacheClearSyncFlags(pPager->pPCache);
}
- return rc;
+ return SQLITE_OK;
}
/*
-** Given a list of pages (connected by the PgHdr.pDirty pointer) write
-** every one of those pages out to the database file. No calls are made
-** to the page-cache to mark the pages as clean. It is the responsibility
-** of the caller to use PcacheCleanAll() or PcacheMakeClean() to mark
-** the pages as clean.
+** The argument is the first in a linked list of dirty pages connected
+** by the PgHdr.pDirty pointer. This function writes each one of the
+** in-memory pages in the list to the database file. The argument may
+** be NULL, representing an empty list. In this case this function is
+** a no-op.
+**
+** The pager must hold at least a RESERVED lock when this function
+** is called. Before writing anything to the database file, this lock
+** is upgraded to an EXCLUSIVE lock. If the lock cannot be obtained,
+** SQLITE_BUSY is returned and no data is written to the database file.
+**
+** If the pager is a temp-file pager and the actual file-system file
+** is not yet open, it is created and opened before any data is
+** written out.
+**
+** Once the lock has been upgraded and, if necessary, the file opened,
+** the pages are written out to the database file in list order. Writing
+** a page is skipped if it meets either of the following criteria:
+**
+** * The page number is greater than Pager.dbSize, or
+** * The PGHDR_DONT_WRITE flag is set on the page.
+**
+** If writing out a page causes the database file to grow, Pager.dbFileSize
+** is updated accordingly. If page 1 is written out, then the value cached
+** in Pager.dbFileVers[] is updated to match the new value stored in
+** the database file.
+**
+** If everything is successful, SQLITE_OK is returned. If an IO error
+** occurs, an IO error code is returned. Or, if the EXCLUSIVE lock cannot
+** be obtained, SQLITE_BUSY is returned.
*/
static int pager_write_pagelist(PgHdr *pList){
- Pager *pPager;
- int rc;
+ Pager *pPager; /* Pager object */
+ int rc; /* Return code */
if( pList==0 ) return SQLITE_OK;
pPager = pList->pPager;
/* At this point there may be either a RESERVED or EXCLUSIVE lock on the
** database file. If there is already an EXCLUSIVE lock, the following
- ** calls to sqlite3OsLock() are no-ops.
+ ** call is a no-op.
**
** Moving the lock from RESERVED to EXCLUSIVE actually involves going
** through an intermediate state PENDING. A PENDING lock prevents new
** EXCLUSIVE, it means the database file has been changed and any rollback
** will require a journal playback.
*/
+ assert( pPager->state>=PAGER_RESERVED );
rc = pager_wait_on_lock(pPager, EXCLUSIVE_LOCK);
- if( rc!=SQLITE_OK ){
- return rc;
- }
- while( pList ){
+ /* If the file is a temp-file has not yet been opened, open it now. It
+ ** is not possible for rc to be other than SQLITE_OK if this branch
+ ** is taken, as pager_wait_on_lock() is a no-op for temp-files.
+ */
+ if( !isOpen(pPager->fd) ){
+ assert( pPager->tempFile && rc==SQLITE_OK );
+ rc = pagerOpentemp(pPager, pPager->fd, pPager->vfsFlags);
+ }
- /* If the file has not yet been opened, open it now. */
- if( !pPager->fd->pMethods ){
- assert(pPager->tempFile);
- rc = sqlite3PagerOpentemp(pPager, pPager->fd, pPager->vfsFlags);
- if( rc ) return rc;
- }
+ while( rc==SQLITE_OK && pList ){
+ Pgno pgno = pList->pgno;
/* If there are dirty pages in the page cache with page numbers greater
** than Pager.dbSize, this means sqlite3PagerTruncateImage() was called to
** make the file smaller (presumably by auto-vacuum code). Do not write
** any such pages to the file.
+ **
+ ** Also, do not write out any page that has the PGHDR_DONT_WRITE flag
+ ** set (set by sqlite3PagerDontWrite()).
*/
- if( pList->pgno<=pPager->dbSize && 0==(pList->flags&PGHDR_DONT_WRITE) ){
- i64 offset = (pList->pgno-1)*(i64)pPager->pageSize;
- char *pData = CODEC2(pPager, pList->pData, pList->pgno, 6);
+ if( pgno<=pPager->dbSize && 0==(pList->flags&PGHDR_DONT_WRITE) ){
+ i64 offset = (pgno-1)*(i64)pPager->pageSize; /* Offset to write */
+ char *pData = CODEC2(pPager, pList->pData, pgno, 6); /* Data to write */
- PAGERTRACE(("STORE %d page %d hash(%08x)\n",
- PAGERID(pPager), pList->pgno, pager_pagehash(pList)));
- IOTRACE(("PGOUT %p %d\n", pPager, pList->pgno));
+ /* Write out the page data. */
rc = sqlite3OsWrite(pPager->fd, pData, pPager->pageSize, offset);
- PAGER_INCR(sqlite3_pager_writedb_count);
- PAGER_INCR(pPager->nWrite);
- if( pList->pgno==1 ){
+
+ /* If page 1 was just written, update Pager.dbFileVers to match
+ ** the value now stored in the database file. If writing this
+ ** page caused the database file to grow, update dbFileSize.
+ */
+ if( pgno==1 ){
memcpy(&pPager->dbFileVers, &pData[24], sizeof(pPager->dbFileVers));
}
- if( pList->pgno>pPager->dbFileSize ){
- pPager->dbFileSize = pList->pgno;
+ if( pgno>pPager->dbFileSize ){
+ pPager->dbFileSize = pgno;
}
+
+ /* Update any backup objects copying the contents of this pager. */
+ sqlite3BackupUpdate(pPager->pBackup, pgno, (u8 *)pData);
+
+ PAGERTRACE(("STORE %d page %d hash(%08x)\n",
+ PAGERID(pPager), pgno, pager_pagehash(pList)));
+ IOTRACE(("PGOUT %p %d\n", pPager, pgno));
+ PAGER_INCR(sqlite3_pager_writedb_count);
+ PAGER_INCR(pPager->nWrite);
+ }else{
+ PAGERTRACE(("NOSTORE %d page %d\n", PAGERID(pPager), pgno));
}
-#ifndef NDEBUG
- else{
- PAGERTRACE(("NOSTORE %d page %d\n", PAGERID(pPager), pList->pgno));
- }
-#endif
- if( rc ) return rc;
#ifdef SQLITE_CHECK_PAGES
pList->pageHash = pager_pagehash(pList);
#endif
pList = pList->pDirty;
}
- return SQLITE_OK;
+ return rc;
}
/*
-** Add the page to the sub-journal. It is the callers responsibility to
-** use subjRequiresPage() to check that it is really required before
-** calling this function.
+** Append a record of the current state of page pPg to the sub-journal.
+** It is the callers responsibility to use subjRequiresPage() to check
+** that it is really required before calling this function.
+**
+** If successful, set the bit corresponding to pPg->pgno in the bitvecs
+** for all open savepoints before returning.
+**
+** This function returns SQLITE_OK if everything is successful, an IO
+** error code if the attempt to write to the sub-journal fails, or
+** SQLITE_NOMEM if a malloc fails while setting a bit in a savepoint
+** bitvec.
*/
static int subjournalPage(PgHdr *pPg){
- int rc;
- void *pData = pPg->pData;
+ int rc = SQLITE_OK;
Pager *pPager = pPg->pPager;
- i64 offset = pPager->stmtNRec*(4+pPager->pageSize);
- char *pData2 = CODEC2(pPager, pData, pPg->pgno, 7);
-
- PAGERTRACE(("STMT-JOURNAL %d page %d\n", PAGERID(pPager), pPg->pgno));
-
- assert( pageInJournal(pPg) || pPg->pgno>pPager->dbOrigSize );
- rc = write32bits(pPager->sjfd, offset, pPg->pgno);
- if( rc==SQLITE_OK ){
- rc = sqlite3OsWrite(pPager->sjfd, pData2, pPager->pageSize, offset+4);
+ if( isOpen(pPager->sjfd) ){
+ void *pData = pPg->pData;
+ i64 offset = pPager->nSubRec*(4+pPager->pageSize);
+ char *pData2 = CODEC2(pPager, pData, pPg->pgno, 7);
+
+ PAGERTRACE(("STMT-JOURNAL %d page %d\n", PAGERID(pPager), pPg->pgno));
+
+ assert( pageInJournal(pPg) || pPg->pgno>pPager->dbOrigSize );
+ rc = write32bits(pPager->sjfd, offset, pPg->pgno);
+ if( rc==SQLITE_OK ){
+ rc = sqlite3OsWrite(pPager->sjfd, pData2, pPager->pageSize, offset+4);
+ }
}
if( rc==SQLITE_OK ){
- pPager->stmtNRec++;
+ pPager->nSubRec++;
assert( pPager->nSavepoint>0 );
rc = addToSavepointBitvecs(pPager, pPg->pgno);
+ testcase( rc!=SQLITE_OK );
}
return rc;
}
/*
** This function is called by the pcache layer when it has reached some
-** soft memory limit. The argument is a pointer to a purgeable Pager
-** object. This function attempts to make a single dirty page that has no
-** outstanding references (if one exists) clean so that it can be recycled
-** by the pcache layer.
+** soft memory limit. The first argument is a pointer to a Pager object
+** (cast as a void*). The pager is always 'purgeable' (not an in-memory
+** database). The second argument is a reference to a page that is
+** currently dirty but has no outstanding references. The page
+** is always associated with the Pager object passed as the first
+** argument.
+**
+** The job of this function is to make pPg clean by writing its contents
+** out to the database file, if possible. This may involve syncing the
+** journal file.
+**
+** If successful, sqlite3PcacheMakeClean() is called on the page and
+** SQLITE_OK returned. If an IO error occurs while trying to make the
+** page clean, the IO error code is returned. If the page cannot be
+** made clean for some other reason, but no error occurs, then SQLITE_OK
+** is returned by sqlite3PcacheMakeClean() is not called.
*/
static int pagerStress(void *p, PgHdr *pPg){
Pager *pPager = (Pager *)p;
int rc = SQLITE_OK;
- if( pPager->doNotSync ){
+ assert( pPg->pPager==pPager );
+ assert( pPg->flags&PGHDR_DIRTY );
+
+ /* The doNotSync flag is set by the sqlite3PagerWrite() function while it
+ ** is journalling a set of two or more database pages that are stored
+ ** on the same disk sector. Syncing the journal is not allowed while
+ ** this is happening as it is important that all members of such a
+ ** set of pages are synced to disk together. So, if the page this function
+ ** is trying to make clean will require a journal sync and the doNotSync
+ ** flag is set, return without doing anything. The pcache layer will
+ ** just have to go ahead and allocate a new page buffer instead of
+ ** reusing pPg.
+ **
+ ** Similarly, if the pager has already entered the error state, do not
+ ** try to write the contents of pPg to disk.
+ */
+ if( pPager->errCode || (pPager->doNotSync && pPg->flags&PGHDR_NEED_SYNC) ){
return SQLITE_OK;
}
- assert( pPg->flags&PGHDR_DIRTY );
- if( pPager->errCode==SQLITE_OK ){
- if( pPg->flags&PGHDR_NEED_SYNC ){
- rc = syncJournal(pPager);
- if( rc==SQLITE_OK && pPager->fullSync &&
- !(pPager->journalMode==PAGER_JOURNALMODE_MEMORY) &&
- !(sqlite3OsDeviceCharacteristics(pPager->fd)&SQLITE_IOCAP_SAFE_APPEND)
- ){
- pPager->nRec = 0;
- rc = writeJournalHdr(pPager);
- }
+ /* Sync the journal file if required. */
+ if( pPg->flags&PGHDR_NEED_SYNC ){
+ rc = syncJournal(pPager);
+ if( rc==SQLITE_OK && pPager->fullSync &&
+ !(pPager->journalMode==PAGER_JOURNALMODE_MEMORY) &&
+ !(sqlite3OsDeviceCharacteristics(pPager->fd)&SQLITE_IOCAP_SAFE_APPEND)
+ ){
+ pPager->nRec = 0;
+ rc = writeJournalHdr(pPager);
}
- if( rc==SQLITE_OK ){
- pPg->pDirty = 0;
- if( pPg->pgno>pPager->dbSize && subjRequiresPage(pPg) ){
- rc = subjournalPage(pPg);
- }
- if( rc==SQLITE_OK ){
- rc = pager_write_pagelist(pPg);
- }
+ }
+
+ /* If the page number of this page is larger than the current size of
+ ** the database image, it may need to be written to the sub-journal.
+ ** This is because the call to pager_write_pagelist() below will not
+ ** actually write data to the file in this case.
+ **
+ ** Consider the following sequence of events:
+ **
+ ** BEGIN;
+ ** <journal page X>
+ ** <modify page X>
+ ** SAVEPOINT sp;
+ ** <shrink database file to Y pages>
+ ** pagerStress(page X)
+ ** ROLLBACK TO sp;
+ **
+ ** If (X>Y), then when pagerStress is called page X will not be written
+ ** out to the database file, but will be dropped from the cache. Then,
+ ** following the "ROLLBACK TO sp" statement, reading page X will read
+ ** data from the database file. This will be the copy of page X as it
+ ** was when the transaction started, not as it was when "SAVEPOINT sp"
+ ** was executed.
+ **
+ ** The solution is to write the current data for page X into the
+ ** sub-journal file now (if it is not already there), so that it will
+ ** be restored to its current value when the "ROLLBACK TO sp" is
+ ** executed.
+ */
+ if( rc==SQLITE_OK && pPg->pgno>pPager->dbSize && subjRequiresPage(pPg) ){
+ rc = subjournalPage(pPg);
+ }
+
+ /* Write the contents of the page out to the database file. */
+ if( rc==SQLITE_OK ){
+ pPg->pDirty = 0;
+ rc = pager_write_pagelist(pPg);
+ }
+
+ /* Mark the page as clean. */
+ if( rc==SQLITE_OK ){
+ PAGERTRACE(("STRESS %d page %d\n", PAGERID(pPager), pPg->pgno));
+ sqlite3PcacheMakeClean(pPg);
+ }
+
+ return pager_error(pPager, rc);
+}
+
+
+/*
+** Allocate and initialize a new Pager object and put a pointer to it
+** in *ppPager. The pager should eventually be freed by passing it
+** to sqlite3PagerClose().
+**
+** The zFilename argument is the path to the database file to open.
+** If zFilename is NULL then a randomly-named temporary file is created
+** and used as the file to be cached. Temporary files are be deleted
+** automatically when they are closed. If zFilename is ":memory:" then
+** all information is held in cache. It is never written to disk.
+** This can be used to implement an in-memory database.
+**
+** The nExtra parameter specifies the number of bytes of space allocated
+** along with each page reference. This space is available to the user
+** via the sqlite3PagerGetExtra() API.
+**
+** The flags argument is used to specify properties that affect the
+** operation of the pager. It should be passed some bitwise combination
+** of the PAGER_OMIT_JOURNAL and PAGER_NO_READLOCK flags.
+**
+** The vfsFlags parameter is a bitmask to pass to the flags parameter
+** of the xOpen() method of the supplied VFS when opening files.
+**
+** If the pager object is allocated and the specified file opened
+** successfully, SQLITE_OK is returned and *ppPager set to point to
+** the new pager object. If an error occurs, *ppPager is set to NULL
+** and error code returned. This function may return SQLITE_NOMEM
+** (sqlite3Malloc() is used to allocate memory), SQLITE_CANTOPEN or
+** various SQLITE_IO_XXX errors.
+*/
+SQLITE_PRIVATE int sqlite3PagerOpen(
+ sqlite3_vfs *pVfs, /* The virtual file system to use */
+ Pager **ppPager, /* OUT: Return the Pager structure here */
+ const char *zFilename, /* Name of the database file to open */
+ int nExtra, /* Extra bytes append to each in-memory page */
+ int flags, /* flags controlling this file */
+ int vfsFlags /* flags passed through to sqlite3_vfs.xOpen() */
+){
+ u8 *pPtr;
+ Pager *pPager = 0; /* Pager object to allocate and return */
+ int rc = SQLITE_OK; /* Return code */
+ int tempFile = 0; /* True for temp files (incl. in-memory files) */
+ int memDb = 0; /* True if this is an in-memory file */
+ int readOnly = 0; /* True if this is a read-only file */
+ int journalFileSize; /* Bytes to allocate for each journal fd */
+ char *zPathname = 0; /* Full path to database file */
+ int nPathname = 0; /* Number of bytes in zPathname */
+ int useJournal = (flags & PAGER_OMIT_JOURNAL)==0; /* False to omit journal */
+ int noReadlock = (flags & PAGER_NO_READLOCK)!=0; /* True to omit read-lock */
+ int pcacheSize = sqlite3PcacheSize(); /* Bytes to allocate for PCache */
+ u16 szPageDflt = SQLITE_DEFAULT_PAGE_SIZE; /* Default page size */
+
+ /* Figure out how much space is required for each journal file-handle
+ ** (there are two of them, the main journal and the sub-journal). This
+ ** is the maximum space required for an in-memory journal file handle
+ ** and a regular journal file-handle. Note that a "regular journal-handle"
+ ** may be a wrapper capable of caching the first portion of the journal
+ ** file in memory to implement the atomic-write optimization (see
+ ** source file journal.c).
+ */
+ if( sqlite3JournalSize(pVfs)>sqlite3MemJournalSize() ){
+ journalFileSize = sqlite3JournalSize(pVfs);
+ }else{
+ journalFileSize = sqlite3MemJournalSize();
+ }
+
+ /* Set the output variable to NULL in case an error occurs. */
+ *ppPager = 0;
+
+ /* Compute and store the full pathname in an allocated buffer pointed
+ ** to by zPathname, length nPathname. Or, if this is a temporary file,
+ ** leave both nPathname and zPathname set to 0.
+ */
+ if( zFilename && zFilename[0] ){
+ nPathname = pVfs->mxPathname+1;
+ zPathname = sqlite3Malloc(nPathname*2);
+ if( zPathname==0 ){
+ return SQLITE_NOMEM;
+ }
+#ifndef SQLITE_OMIT_MEMORYDB
+ if( strcmp(zFilename,":memory:")==0 ){
+ memDb = 1;
+ zPathname[0] = 0;
+ }else
+#endif
+ {
+ zPathname[0] = 0; /* Make sure initialized even if FullPathname() fails */
+ rc = sqlite3OsFullPathname(pVfs, zFilename, nPathname, zPathname);
+ }
+
+ nPathname = sqlite3Strlen30(zPathname);
+ if( rc==SQLITE_OK && nPathname+8>pVfs->mxPathname ){
+ /* This branch is taken when the journal path required by
+ ** the database being opened will be more than pVfs->mxPathname
+ ** bytes in length. This means the database cannot be opened,
+ ** as it will not be possible to open the journal file or even
+ ** check for a hot-journal before reading.
+ */
+ rc = SQLITE_CANTOPEN;
}
if( rc!=SQLITE_OK ){
- pager_error(pPager, rc);
+ sqlite3_free(zPathname);
+ return rc;
}
}
+ /* Allocate memory for the Pager structure, PCache object, the
+ ** three file descriptors, the database file name and the journal
+ ** file name. The layout in memory is as follows:
+ **
+ ** Pager object (sizeof(Pager) bytes)
+ ** PCache object (sqlite3PcacheSize() bytes)
+ ** Database file handle (pVfs->szOsFile bytes)
+ ** Sub-journal file handle (journalFileSize bytes)
+ ** Main journal file handle (journalFileSize bytes)
+ ** Database file name (nPathname+1 bytes)
+ ** Journal file name (nPathname+8+1 bytes)
+ */
+ pPtr = (u8 *)sqlite3MallocZero(
+ sizeof(*pPager) + /* Pager structure */
+ pcacheSize + /* PCache object */
+ pVfs->szOsFile + /* The main db file */
+ journalFileSize * 2 + /* The two journal files */
+ nPathname + 1 + /* zFilename */
+ nPathname + 8 + 1 /* zJournal */
+ );
+ if( !pPtr ){
+ sqlite3_free(zPathname);
+ return SQLITE_NOMEM;
+ }
+ pPager = (Pager*)(pPtr);
+ pPager->pPCache = (PCache*)(pPtr += sizeof(*pPager));
+ pPager->fd = (sqlite3_file*)(pPtr += pcacheSize);
+ pPager->sjfd = (sqlite3_file*)(pPtr += pVfs->szOsFile);
+ pPager->jfd = (sqlite3_file*)(pPtr += journalFileSize);
+ pPager->zFilename = (char*)(pPtr += journalFileSize);
+
+ /* Fill in the Pager.zFilename and Pager.zJournal buffers, if required. */
+ if( zPathname ){
+ pPager->zJournal = (char*)(pPtr += nPathname + 1);
+ memcpy(pPager->zFilename, zPathname, nPathname);
+ memcpy(pPager->zJournal, zPathname, nPathname);
+ memcpy(&pPager->zJournal[nPathname], "-journal", 8);
+ sqlite3_free(zPathname);
+ }
+ pPager->pVfs = pVfs;
+ pPager->vfsFlags = vfsFlags;
+
+ /* Open the pager file.
+ */
+ if( zFilename && zFilename[0] && !memDb ){
+ int fout = 0; /* VFS flags returned by xOpen() */
+ rc = sqlite3OsOpen(pVfs, pPager->zFilename, pPager->fd, vfsFlags, &fout);
+ readOnly = (fout&SQLITE_OPEN_READONLY);
+
+ /* If the file was successfully opened for read/write access,
+ ** choose a default page size in case we have to create the
+ ** database file. The default page size is the maximum of:
+ **
+ ** + SQLITE_DEFAULT_PAGE_SIZE,
+ ** + The value returned by sqlite3OsSectorSize()
+ ** + The largest page size that can be written atomically.
+ */
+ if( rc==SQLITE_OK && !readOnly ){
+ setSectorSize(pPager);
+ assert(SQLITE_DEFAULT_PAGE_SIZE<=SQLITE_MAX_DEFAULT_PAGE_SIZE);
+ if( szPageDflt<pPager->sectorSize ){
+ if( pPager->sectorSize>SQLITE_MAX_DEFAULT_PAGE_SIZE ){
+ szPageDflt = SQLITE_MAX_DEFAULT_PAGE_SIZE;
+ }else{
+ szPageDflt = (u16)pPager->sectorSize;
+ }
+ }
+#ifdef SQLITE_ENABLE_ATOMIC_WRITE
+ {
+ int iDc = sqlite3OsDeviceCharacteristics(pPager->fd);
+ int ii;
+ assert(SQLITE_IOCAP_ATOMIC512==(512>>8));
+ assert(SQLITE_IOCAP_ATOMIC64K==(65536>>8));
+ assert(SQLITE_MAX_DEFAULT_PAGE_SIZE<=65536);
+ for(ii=szPageDflt; ii<=SQLITE_MAX_DEFAULT_PAGE_SIZE; ii=ii*2){
+ if( iDc&(SQLITE_IOCAP_ATOMIC|(ii>>8)) ){
+ szPageDflt = ii;
+ }
+ }
+ }
+#endif
+ }
+ }else{
+ /* If a temporary file is requested, it is not opened immediately.
+ ** In this case we accept the default page size and delay actually
+ ** opening the file until the first call to OsWrite().
+ **
+ ** This branch is also run for an in-memory database. An in-memory
+ ** database is the same as a temp-file that is never written out to
+ ** disk and uses an in-memory rollback journal.
+ */
+ tempFile = 1;
+ pPager->state = PAGER_EXCLUSIVE;
+ }
+
+ /* The following call to PagerSetPagesize() serves to set the value of
+ ** Pager.pageSize and to allocate the Pager.pTmpSpace buffer.
+ */
if( rc==SQLITE_OK ){
- PAGERTRACE(("STRESS %d page %d\n", PAGERID(pPager), pPg->pgno));
- sqlite3PcacheMakeClean(pPg);
+ assert( pPager->memDb==0 );
+ rc = sqlite3PagerSetPagesize(pPager, &szPageDflt);
+ testcase( rc!=SQLITE_OK );
}
- return rc;
+
+ /* If an error occured in either of the blocks above, free the
+ ** Pager structure and close the file.
+ */
+ if( rc!=SQLITE_OK ){
+ assert( !pPager->pTmpSpace );
+ sqlite3OsClose(pPager->fd);
+ sqlite3_free(pPager);
+ return rc;
+ }
+
+ /* Initialize the PCache object. */
+ nExtra = FORCE_ALIGNMENT(nExtra);
+ sqlite3PcacheOpen(szPageDflt, nExtra, !memDb,
+ !memDb?pagerStress:0, (void *)pPager, pPager->pPCache);
+
+ PAGERTRACE(("OPEN %d %s\n", FILEHANDLEID(pPager->fd), pPager->zFilename));
+ IOTRACE(("OPEN %p %s\n", pPager, pPager->zFilename))
+
+ pPager->useJournal = (u8)useJournal;
+ pPager->noReadlock = (noReadlock && readOnly) ?1:0;
+ /* pPager->stmtOpen = 0; */
+ /* pPager->stmtInUse = 0; */
+ /* pPager->nRef = 0; */
+ pPager->dbSizeValid = (u8)memDb;
+ /* pPager->stmtSize = 0; */
+ /* pPager->stmtJSize = 0; */
+ /* pPager->nPage = 0; */
+ pPager->mxPgno = SQLITE_MAX_PAGE_COUNT;
+ /* pPager->state = PAGER_UNLOCK; */
+ assert( pPager->state == (tempFile ? PAGER_EXCLUSIVE : PAGER_UNLOCK) );
+ /* pPager->errMask = 0; */
+ pPager->tempFile = (u8)tempFile;
+ assert( tempFile==PAGER_LOCKINGMODE_NORMAL
+ || tempFile==PAGER_LOCKINGMODE_EXCLUSIVE );
+ assert( PAGER_LOCKINGMODE_EXCLUSIVE==1 );
+ pPager->exclusiveMode = (u8)tempFile;
+ pPager->changeCountDone = pPager->tempFile;
+ pPager->memDb = (u8)memDb;
+ pPager->readOnly = (u8)readOnly;
+ /* pPager->needSync = 0; */
+ pPager->noSync = (pPager->tempFile || !useJournal) ?1:0;
+ pPager->fullSync = pPager->noSync ?0:1;
+ pPager->sync_flags = SQLITE_SYNC_NORMAL;
+ /* pPager->pFirst = 0; */
+ /* pPager->pFirstSynced = 0; */
+ /* pPager->pLast = 0; */
+ pPager->nExtra = nExtra;
+ pPager->journalSizeLimit = SQLITE_DEFAULT_JOURNAL_SIZE_LIMIT;
+ assert( isOpen(pPager->fd) || tempFile );
+ setSectorSize(pPager);
+ if( memDb ){
+ pPager->journalMode = PAGER_JOURNALMODE_MEMORY;
+ }
+ /* pPager->xBusyHandler = 0; */
+ /* pPager->pBusyHandlerArg = 0; */
+ /* memset(pPager->aHash, 0, sizeof(pPager->aHash)); */
+ *ppPager = pPager;
+ return SQLITE_OK;
}
+
/*
-** Return 1 if there is a hot journal on the given pager.
-** A hot journal is one that needs to be played back.
+** This function is called after transitioning from PAGER_UNLOCK to
+** PAGER_SHARED state. It tests if there is a hot journal present in
+** the file-system for the given pager. A hot journal is one that
+** needs to be played back. According to this function, a hot-journal
+** file exists if the following three criteria are met:
+**
+** * The journal file exists in the file system, and
+** * No process holds a RESERVED or greater lock on the database file, and
+** * The database file itself is greater than 0 bytes in size.
**
** If the current size of the database file is 0 but a journal file
** exists, that is probably an old journal left over from a prior
-** database with the same name. Just delete the journal.
-**
-** Return negative if unable to determine the status of the journal.
+** database with the same name. In this case the journal file is
+** just deleted using OsDelete, *pExists is set to 0 and SQLITE_OK
+** is returned.
**
** This routine does not open the journal file to examine its
** content. Hence, the journal might contain the name of a master
** journal file exists and is not empty this routine assumes it
** is hot. The pager_playback() routine will discover that the
** journal file is not really hot and will no-op.
+**
+** If a hot-journal file is found to exist, *pExists is set to 1 and
+** SQLITE_OK returned. If no hot-journal file is present, *pExists is
+** set to 0 and SQLITE_OK returned. If an IO error occurs while trying
+** to determine whether or not a hot-journal file exists, the IO error
+** code is returned and the value of *pExists is undefined.
*/
static int hasHotJournal(Pager *pPager, int *pExists){
- sqlite3_vfs *pVfs = pPager->pVfs;
- int rc = SQLITE_OK;
- int exists = 0;
- int locked = 0;
+ sqlite3_vfs * const pVfs = pPager->pVfs;
+ int rc; /* Return code */
+ int exists = 0; /* True if a journal file is present */
+ int locked = 0; /* True if some process holds a RESERVED lock */
+
assert( pPager!=0 );
assert( pPager->useJournal );
- assert( pPager->fd->pMethods );
+ assert( isOpen(pPager->fd) );
+
*pExists = 0;
rc = sqlite3OsAccess(pVfs, pPager->zJournal, SQLITE_ACCESS_EXISTS, &exists);
if( rc==SQLITE_OK && exists ){
rc = sqlite3OsCheckReservedLock(pPager->fd, &locked);
- }
- if( rc==SQLITE_OK && exists && !locked ){
- int nPage;
- rc = sqlite3PagerPagecount(pPager, &nPage);
- if( rc==SQLITE_OK ){
- if( nPage==0 ){
- sqlite3OsDelete(pVfs, pPager->zJournal, 0);
- }else{
- *pExists = 1;
+ if( rc==SQLITE_OK && !locked ){
+ int nPage;
+ rc = sqlite3PagerPagecount(pPager, &nPage);
+ if( rc==SQLITE_OK ){
+ if( nPage==0 ){
+ sqlite3OsDelete(pVfs, pPager->zJournal, 0);
+ }else{
+ *pExists = 1;
+ }
}
}
}
}
/*
-** Read the content of page pPg out of the database file.
+** Read the content for page pPg out of the database file and into
+** pPg->pData. A shared lock or greater must be held on the database
+** file before this function is called.
+**
+** If page 1 is read, then the value of Pager.dbFileVers[] is set to
+** the value read from the database file.
+**
+** If an IO error occurs, then the IO error is returned to the caller.
+** Otherwise, SQLITE_OK is returned.
*/
-static int readDbPage(Pager *pPager, PgHdr *pPg, Pgno pgno){
- int rc;
- i64 offset;
- assert( MEMDB==0 );
- assert(pPager->fd->pMethods||pPager->tempFile);
- if( !pPager->fd->pMethods ){
+static int readDbPage(PgHdr *pPg){
+ Pager *pPager = pPg->pPager; /* Pager object associated with page pPg */
+ Pgno pgno = pPg->pgno; /* Page number to read */
+ int rc; /* Return code */
+ i64 iOffset; /* Byte offset of file to read from */
+
+ assert( pPager->state>=PAGER_SHARED && !MEMDB );
+
+ if( !isOpen(pPager->fd) ){
+ assert( pPager->tempFile );
+ memset(pPg->pData, 0, pPager->pageSize);
return SQLITE_IOERR_SHORT_READ;
}
- offset = (pgno-1)*(i64)pPager->pageSize;
- rc = sqlite3OsRead(pPager->fd, pPg->pData, pPager->pageSize, offset);
+ iOffset = (pgno-1)*(i64)pPager->pageSize;
+ rc = sqlite3OsRead(pPager->fd, pPg->pData, pPager->pageSize, iOffset);
+ if( pgno==1 ){
+ u8 *dbFileVers = &((u8*)pPg->pData)[24];
+ memcpy(&pPager->dbFileVers, dbFileVers, sizeof(pPager->dbFileVers));
+ }
+ CODEC1(pPager, pPg->pData, pgno, 3);
+
PAGER_INCR(sqlite3_pager_readdb_count);
PAGER_INCR(pPager->nRead);
IOTRACE(("PGIN %p %d\n", pPager, pgno));
- if( pgno==1 ){
- memcpy(&pPager->dbFileVers, &((u8*)pPg->pData)[24],
- sizeof(pPager->dbFileVers));
- }
- CODEC1(pPager, pPg->pData, pPg->pgno, 3);
PAGERTRACE(("FETCH %d page %d hash(%08x)\n",
- PAGERID(pPager), pPg->pgno, pager_pagehash(pPg)));
+ PAGERID(pPager), pgno, pager_pagehash(pPg)));
+
return rc;
}
-
/*
-** This function is called to obtain the shared lock required before
-** data may be read from the pager cache. If the shared lock has already
-** been obtained, this function is a no-op.
+** This function is called whenever the upper layer requests a database
+** page is requested, before the cache is checked for a suitable page
+** or any data is read from the database. It performs the following
+** two functions:
+**
+** 1) If the pager is currently in PAGER_UNLOCK state (no lock held
+** on the database file), then an attempt is made to obtain a
+** SHARED lock on the database file. Immediately after obtaining
+** the SHARED lock, the file-system is checked for a hot-journal,
+** which is played back if present. Following any hot-journal
+** rollback, the contents of the cache are validated by checking
+** the 'change-counter' field of the database file header and
+** discarded if they are found to be invalid.
**
-** Immediately after obtaining the shared lock (if required), this function
-** checks for a hot-journal file. If one is found, an emergency rollback
-** is performed immediately.
+** 2) If the pager is running in exclusive-mode, and there are currently
+** no outstanding references to any pages, and is in the error state,
+** then an attempt is made to clear the error state by discarding
+** the contents of the page cache and rolling back any open journal
+** file.
+**
+** If the operation described by (2) above is not attempted, and if the
+** pager is in an error state other than SQLITE_FULL when this is called,
+** the error state error code is returned. It is permitted to read the
+** database when in SQLITE_FULL error state.
+**
+** Otherwise, if everything is successful, SQLITE_OK is returned. If an
+** IO error occurs while locking the database, checking for a hot-journal
+** file or rolling back a journal file, the IO error code is returned.
*/
static int pagerSharedLock(Pager *pPager){
- int rc = SQLITE_OK;
- int isErrorReset = 0;
+ int rc = SQLITE_OK; /* Return code */
+ int isErrorReset = 0; /* True if recovering from error state */
/* If this database is opened for exclusive access, has no outstanding
- ** page references and is in an error-state, now is the chance to clear
+ ** page references and is in an error-state, this is a chance to clear
** the error. Discard the contents of the pager-cache and treat any
** open journal file as a hot-journal.
*/
if( !MEMDB && pPager->exclusiveMode
&& sqlite3PcacheRefCount(pPager->pPCache)==0 && pPager->errCode
){
- if( pPager->journalOpen ){
+ if( isOpen(pPager->jfd) ){
isErrorReset = 1;
}
pPager->errCode = SQLITE_OK;
}
if( pPager->state==PAGER_UNLOCK || isErrorReset ){
- sqlite3_vfs *pVfs = pPager->pVfs;
+ sqlite3_vfs * const pVfs = pPager->pVfs;
int isHotJournal = 0;
assert( !MEMDB );
assert( sqlite3PcacheRefCount(pPager->pPCache)==0 );
** important that a RESERVED lock is not obtained on the way to the
** EXCLUSIVE lock. If it were, another process might open the
** database file, detect the RESERVED lock, and conclude that the
- ** database is safe to read while this process is still rolling it
- ** back.
+ ** database is safe to read while this process is still rolling the
+ ** hot-journal back.
**
- ** Because the intermediate RESERVED lock is not requested, the
- ** second process will get to this point in the code and fail to
- ** obtain its own EXCLUSIVE lock on the database file.
+ ** Because the intermediate RESERVED lock is not requested, any
+ ** other process attempting to access the database file will get to
+ ** this point in the code and fail to obtain its own EXCLUSIVE lock
+ ** on the database file.
*/
if( pPager->state<EXCLUSIVE_LOCK ){
rc = sqlite3OsLock(pPager->fd, EXCLUSIVE_LOCK);
** OsTruncate() call used in exclusive-access mode also requires
** a read/write file handle.
*/
- if( !isErrorReset && pPager->journalOpen==0 ){
+ if( !isOpen(pPager->jfd) ){
int res;
rc = sqlite3OsAccess(pVfs,pPager->zJournal,SQLITE_ACCESS_EXISTS,&res);
if( rc==SQLITE_OK ){
int f = SQLITE_OPEN_READWRITE|SQLITE_OPEN_MAIN_JOURNAL;
assert( !pPager->tempFile );
rc = sqlite3OsOpen(pVfs, pPager->zJournal, pPager->jfd, f, &fout);
- assert( rc!=SQLITE_OK || pPager->jfd->pMethods );
+ assert( rc!=SQLITE_OK || isOpen(pPager->jfd) );
if( rc==SQLITE_OK && fout&SQLITE_OPEN_READONLY ){
rc = SQLITE_CANTOPEN;
sqlite3OsClose(pPager->jfd);
if( rc!=SQLITE_OK ){
goto failed;
}
- pPager->journalOpen = 1;
+
+ /* TODO: Why are these cleared here? Is it necessary? */
pPager->journalStarted = 0;
pPager->journalOff = 0;
pPager->setMaster = 0;
** playing back the hot-journal so that we don't end up with
** an inconsistent cache.
*/
- sqlite3PcacheClear(pPager->pPCache);
rc = pager_playback(pPager, 1);
if( rc!=SQLITE_OK ){
rc = pager_error(pPager, rc);
goto failed;
}
- assert(pPager->state==PAGER_SHARED ||
- (pPager->exclusiveMode && pPager->state>PAGER_SHARED)
+ assert( (pPager->state==PAGER_SHARED)
+ || (pPager->exclusiveMode && pPager->state>PAGER_SHARED)
);
}
}
/*
-** Make sure we have the content for a page. If the page was
-** previously acquired with noContent==1, then the content was
-** just initialized to zeros instead of being read from disk.
-** But now we need the real data off of disk. So make sure we
-** have it. Read it in if we do not have it already.
-*/
-static int pager_get_content(PgHdr *pPg){
- if( pPg->flags&PGHDR_NEED_READ ){
- int rc = readDbPage(pPg->pPager, pPg, pPg->pgno);
- if( rc==SQLITE_OK ){
- pPg->flags &= ~PGHDR_NEED_READ;
- }else{
- return rc;
- }
- }
- return SQLITE_OK;
-}
-
-/*
-** If the reference count has reached zero, and the pager is not in the
-** middle of a write transaction or opened in exclusive mode, unlock it.
+** If the reference count has reached zero, rollback any active
+** transaction and unlock the pager.
*/
static void pagerUnlockIfUnused(Pager *pPager){
- if( (sqlite3PcacheRefCount(pPager->pPCache)==0)
- && (!pPager->exclusiveMode || pPager->journalOff>0)
- ){
+ if( sqlite3PcacheRefCount(pPager->pPCache)==0 ){
pagerUnlockAndRollback(pPager);
}
}
}
/*
-** Acquire a page.
+** Acquire a reference to page number pgno in pager pPager (a page
+** reference has type DbPage*). If the requested reference is
+** successfully obtained, it is copied to *ppPage and SQLITE_OK returned.
+**
+** This function calls pagerSharedLock() to obtain a SHARED lock on
+** the database file if such a lock or greater is not already held.
+** This may cause hot-journal rollback or a cache purge. See comments
+** above function pagerSharedLock() for details.
+**
+** If the requested page is already in the cache, it is returned.
+** Otherwise, a new page object is allocated and populated with data
+** read from the database file. In some cases, the pcache module may
+** choose not to allocate a new page object and may reuse an existing
+** object with no outstanding references.
**
-** A read lock on the disk file is obtained when the first page is acquired.
-** This read lock is dropped when the last page is released.
+** The extra data appended to a page is always initialized to zeros the
+** first time a page is loaded into memory. If the page requested is
+** already in the cache when this function is called, then the extra
+** data is left as it was when the page object was last used.
**
-** This routine works for any page number greater than 0. If the database
-** file is smaller than the requested page, then no actual disk
-** read occurs and the memory image of the page is initialized to
-** all zeros. The extra data appended to a page is always initialized
-** to zeros the first time a page is loaded into memory.
+** If the database image is smaller than the requested page or if a
+** non-zero value is passed as the noContent parameter and the
+** requested page is not already stored in the cache, then no
+** actual disk read occurs. In this case the memory image of the
+** page is initialized to all zeros.
+**
+** If noContent is true, it means that we do not care about the contents
+** of the page. This occurs in two seperate scenarios:
+**
+** a) When reading a free-list leaf page from the database, and
+**
+** b) When a savepoint is being rolled back and we need to load
+** a new page into the cache to populate with the data read
+** from the savepoint journal.
+**
+** If noContent is true, then the data returned is zeroed instead of
+** being read from the database. Additionally, the bits corresponding
+** to pgno in Pager.pInJournal (bitvec of pages already written to the
+** journal file) and the PagerSavepoint.pInSavepoint bitvecs of any open
+** savepoints are set. This means if the page is made writable at any
+** point in the future, using a call to sqlite3PagerWrite(), its contents
+** will not be journaled. This saves IO.
**
** The acquisition might fail for several reasons. In all cases,
** an appropriate error code is returned and *ppPage is set to NULL.
** has to go to disk, and could also playback an old journal if necessary.
** Since Lookup() never goes to disk, it never has to deal with locks
** or journal files.
-**
-** If noContent is false, the page contents are actually read from disk.
-** If noContent is true, it means that we do not care about the contents
-** of the page at this time, so do not do a disk read. Just fill in the
-** page content with zeros. But mark the fact that we have not read the
-** content by setting the PgHdr.needRead flag. Later on, if
-** sqlite3PagerWrite() is called on this page or if this routine is
-** called again with noContent==0, that means that the content is needed
-** and the disk read should occur at that point.
*/
SQLITE_PRIVATE int sqlite3PagerAcquire(
Pager *pPager, /* The pager open on the database file */
PgHdr *pPg = 0;
int rc;
+ assert( assert_pager_state(pPager) );
assert( pPager->state==PAGER_UNLOCK
|| sqlite3PcacheRefCount(pPager->pPCache)>0
|| pgno==1
if( rc!=SQLITE_OK ){
return rc;
}
+ assert( pPg->pgno==pgno );
+ assert( pPg->pPager==pPager || pPg->pPager==0 );
if( pPg->pPager==0 ){
/* The pager cache has created a new page. Its content needs to
** be initialized.
int nMax;
PAGER_INCR(pPager->nMiss);
pPg->pPager = pPager;
- memset(pPg->pExtra, 0, pPager->nExtra);
rc = sqlite3PagerPagecount(pPager, &nMax);
if( rc!=SQLITE_OK ){
sqlite3PagerUnref(pPg);
return SQLITE_FULL;
}
- memset(pPg->pData, 0, pPager->pageSize);
if( noContent ){
- pPg->flags |= PGHDR_NEED_READ;
+ /* Failure to set the bits in the InJournal bit-vectors is benign.
+ ** It merely means that we might do some extra work to journal a
+ ** page that does not need to be journaled. Nevertheless, be sure
+ ** to test the case where a malloc error occurs while trying to set
+ ** a bit in a bit vector.
+ */
+ sqlite3BeginBenignMalloc();
+ if( pgno<=pPager->dbOrigSize ){
+ TESTONLY( rc = ) sqlite3BitvecSet(pPager->pInJournal, pgno);
+ testcase( rc==SQLITE_NOMEM );
+ }
+ TESTONLY( rc = ) addToSavepointBitvecs(pPager, pgno);
+ testcase( rc==SQLITE_NOMEM );
+ sqlite3EndBenignMalloc();
+ }else{
+ memset(pPg->pData, 0, pPager->pageSize);
}
IOTRACE(("ZERO %p %d\n", pPager, pgno));
}else{
- rc = readDbPage(pPager, pPg, pgno);
+ assert( pPg->pPager==pPager );
+ rc = readDbPage(pPg);
if( rc!=SQLITE_OK && rc!=SQLITE_IOERR_SHORT_READ ){
- /* sqlite3PagerUnref(pPg); */
pagerDropPage(pPg);
return rc;
}
#endif
}else{
/* The requested page is in the page cache. */
- assert(sqlite3PcacheRefCount(pPager->pPCache)>0 || pgno==1);
PAGER_INCR(pPager->nHit);
- if( !noContent ){
- rc = pager_get_content(pPg);
- if( rc ){
- sqlite3PagerUnref(pPg);
- return rc;
- }
- }
}
*ppPage = pPg;
/*
** Acquire a page if it is already in the in-memory cache. Do
** not read the page from disk. Return a pointer to the page,
-** or 0 if the page is not in cache.
+** or 0 if the page is not in cache. Also, return 0 if the
+** pager is in PAGER_UNLOCK state when this function is called,
+** or if the pager is in an error state other than SQLITE_FULL.
**
** See also sqlite3PagerGet(). The difference between this routine
** and sqlite3PagerGet() is that _get() will go to the disk and read
}
/*
-** Release a page.
+** Release a page reference.
**
** If the number of references to the page drop to zero, then the
** page is added to the LRU list. When all references to all pages
** are released, a rollback occurs and the lock on the database is
** removed.
*/
-SQLITE_PRIVATE int sqlite3PagerUnref(DbPage *pPg){
+SQLITE_PRIVATE void sqlite3PagerUnref(DbPage *pPg){
if( pPg ){
Pager *pPager = pPg->pPager;
sqlite3PcacheRelease(pPg);
pagerUnlockIfUnused(pPager);
}
- return SQLITE_OK;
}
/*
** sub-journal file is open too. If the main journal is not open,
** this function is a no-op.
**
-** SQLITE_OK is returned if everything goes according to plan. An
-** SQLITE_IOERR_XXX error code is returned if the call to
+** SQLITE_OK is returned if everything goes according to plan.
+** An SQLITE_IOERR_XXX error code is returned if a call to
** sqlite3OsOpen() fails.
*/
static int openSubJournal(Pager *pPager){
int rc = SQLITE_OK;
- if( pPager->journalOpen && !pPager->sjfd->pMethods ){
+ if( isOpen(pPager->jfd) && !isOpen(pPager->sjfd) ){
if( pPager->journalMode==PAGER_JOURNALMODE_MEMORY ){
sqlite3MemJournalOpen(pPager->sjfd);
}else{
- rc = sqlite3PagerOpentemp(pPager, pPager->sjfd, SQLITE_OPEN_SUBJOURNAL);
+ rc = pagerOpentemp(pPager, pPager->sjfd, SQLITE_OPEN_SUBJOURNAL);
}
}
return rc;
}
/*
-** Create a journal file for pPager. There should already be a RESERVED
-** or EXCLUSIVE lock on the database file when this routine is called.
+** This function is called at the start of every write transaction.
+** There must already be a RESERVED or EXCLUSIVE lock on the database
+** file when this routine is called.
+**
+** Open the journal file for pager pPager and write a journal header
+** to the start of it. If there are active savepoints, open the sub-journal
+** as well. This function is only used when the journal file is being
+** opened to write a rollback log for a transaction. It is not used
+** when opening a hot journal file to roll it back.
**
-** Return SQLITE_OK if everything. Return an error code and release the
-** write lock if anything goes wrong.
+** If the journal file is already open (as it may be in exclusive mode),
+** then this function just writes a journal header to the start of the
+** already open file.
+**
+** Whether or not the journal file is opened by this function, the
+** Pager.pInJournal bitvec structure is allocated.
+**
+** Return SQLITE_OK if everything is successful. Otherwise, return
+** SQLITE_NOMEM if the attempt to allocate Pager.pInJournal fails, or
+** an IO error code if opening or writing the journal file fails.
*/
static int pager_open_journal(Pager *pPager){
- sqlite3_vfs *pVfs = pPager->pVfs;
- int flags = (SQLITE_OPEN_READWRITE|SQLITE_OPEN_EXCLUSIVE|SQLITE_OPEN_CREATE);
+ int rc = SQLITE_OK; /* Return code */
+ sqlite3_vfs * const pVfs = pPager->pVfs; /* Local cache of vfs pointer */
- int rc;
assert( pPager->state>=PAGER_RESERVED );
assert( pPager->useJournal );
assert( pPager->pInJournal==0 );
+
+ /* If already in the error state, this function is a no-op. */
+ if( pPager->errCode ){
+ return pPager->errCode;
+ }
+
+ /* TODO: Is it really possible to get here with dbSizeValid==0? If not,
+ ** the call to PagerPagecount() can be removed.
+ */
+ testcase( pPager->dbSizeValid==0 );
sqlite3PagerPagecount(pPager, 0);
+
pPager->pInJournal = sqlite3BitvecCreate(pPager->dbSize);
if( pPager->pInJournal==0 ){
- rc = SQLITE_NOMEM;
- goto failed_to_open_journal;
+ return SQLITE_NOMEM;
}
- if( pPager->journalOpen==0 ){
- if( pPager->tempFile ){
- flags |= (SQLITE_OPEN_DELETEONCLOSE|SQLITE_OPEN_TEMP_JOURNAL);
- }else{
- flags |= (SQLITE_OPEN_MAIN_JOURNAL);
- }
+ /* Open the journal file if it is not already open. */
+ if( !isOpen(pPager->jfd) ){
if( pPager->journalMode==PAGER_JOURNALMODE_MEMORY ){
sqlite3MemJournalOpen(pPager->jfd);
- rc = SQLITE_OK;
}else{
+ const int flags = /* VFS flags to open journal file */
+ SQLITE_OPEN_READWRITE|SQLITE_OPEN_EXCLUSIVE|SQLITE_OPEN_CREATE|
+ (pPager->tempFile ?
+ (SQLITE_OPEN_DELETEONCLOSE|SQLITE_OPEN_TEMP_JOURNAL):
+ (SQLITE_OPEN_MAIN_JOURNAL)
+ );
#ifdef SQLITE_ENABLE_ATOMIC_WRITE
rc = sqlite3JournalOpen(
pVfs, pPager->zJournal, pPager->jfd, flags, jrnlBufferSize(pPager)
rc = sqlite3OsOpen(pVfs, pPager->zJournal, pPager->jfd, flags, 0);
#endif
}
- assert( rc!=SQLITE_OK || pPager->jfd->pMethods );
+ assert( rc!=SQLITE_OK || isOpen(pPager->jfd) );
+ }
+
+
+ /* Write the first journal header to the journal file and open
+ ** the sub-journal if necessary.
+ */
+ if( rc==SQLITE_OK ){
+ /* TODO: Check if all of these are really required. */
+ pPager->dbOrigSize = pPager->dbSize;
+ pPager->journalStarted = 0;
+ pPager->needSync = 0;
+ pPager->nRec = 0;
pPager->journalOff = 0;
pPager->setMaster = 0;
pPager->journalHdr = 0;
- if( rc!=SQLITE_OK ){
- if( rc==SQLITE_NOMEM ){
- sqlite3OsDelete(pVfs, pPager->zJournal, 0);
- }
- goto failed_to_open_journal;
- }
- }
- pPager->journalOpen = 1;
- pPager->journalStarted = 0;
- pPager->needSync = 0;
- pPager->nRec = 0;
- if( pPager->errCode ){
- rc = pPager->errCode;
- goto failed_to_open_journal;
+ rc = writeJournalHdr(pPager);
}
- pPager->dbOrigSize = pPager->dbSize;
-
- rc = writeJournalHdr(pPager);
-
- if( pPager->nSavepoint && rc==SQLITE_OK ){
+ if( rc==SQLITE_OK && pPager->nSavepoint ){
rc = openSubJournal(pPager);
}
- if( rc!=SQLITE_OK && rc!=SQLITE_NOMEM && rc!=SQLITE_IOERR_NOMEM ){
- rc = pager_end_transaction(pPager, 0);
- if( rc==SQLITE_OK ){
- rc = SQLITE_FULL;
- }
- }
- return rc;
-failed_to_open_journal:
- sqlite3BitvecDestroy(pPager->pInJournal);
- pPager->pInJournal = 0;
+ if( rc!=SQLITE_OK ){
+ sqlite3BitvecDestroy(pPager->pInJournal);
+ pPager->pInJournal = 0;
+ }
return rc;
}
/*
-** Acquire a write-lock on the database. The lock is removed when
-** the any of the following happen:
-**
-** * sqlite3PagerCommitPhaseTwo() is called.
-** * sqlite3PagerRollback() is called.
-** * sqlite3PagerClose() is called.
-** * sqlite3PagerUnref() is called to on every outstanding page.
-**
-** The first parameter to this routine is a pointer to any open page of the
-** database file. Nothing changes about the page - it is used merely to
-** acquire a pointer to the Pager structure and as proof that there is
-** already a read-lock on the database.
-**
-** The second parameter indicates how much space in bytes to reserve for a
-** master journal file-name at the start of the journal when it is created.
+** Begin a write-transaction on the specified pager object. If a
+** write-transaction has already been opened, this function is a no-op.
**
-** A journal file is opened if this is not a temporary file. For temporary
-** files, the opening of the journal file is deferred until there is an
-** actual need to write to the journal.
+** If the exFlag argument is false, then acquire at least a RESERVED
+** lock on the database file. If exFlag is true, then acquire at least
+** an EXCLUSIVE lock. If such a lock is already held, no locking
+** functions need be called.
**
-** If the database is already reserved for writing, this routine is a no-op.
+** If this is not a temporary or in-memory file and, the journal file is
+** opened if it has not been already. For a temporary file, the opening
+** of the journal file is deferred until there is an actual need to
+** write to the journal. TODO: Why handle temporary files differently?
**
-** If exFlag is true, go ahead and get an EXCLUSIVE lock on the file
-** immediately instead of waiting until we try to flush the cache. The
-** exFlag is ignored if a transaction is already active.
+** If the journal file is opened (or if it is already open), then a
+** journal-header is written to the start of it.
*/
-SQLITE_PRIVATE int sqlite3PagerBegin(DbPage *pPg, int exFlag){
- Pager *pPager = pPg->pPager;
+SQLITE_PRIVATE int sqlite3PagerBegin(Pager *pPager, int exFlag){
int rc = SQLITE_OK;
- assert( pPg->nRef>0 );
assert( pPager->state!=PAGER_UNLOCK );
if( pPager->state==PAGER_SHARED ){
assert( pPager->pInJournal==0 );
- assert( !MEMDB );
+ assert( !MEMDB && !pPager->tempFile );
+
+ /* Obtain a RESERVED lock on the database file. If the exFlag parameter
+ ** is true, then immediately upgrade this to an EXCLUSIVE lock. The
+ ** busy-handler callback can be used when upgrading to the EXCLUSIVE
+ ** lock, but not when obtaining the RESERVED lock.
+ */
rc = sqlite3OsLock(pPager->fd, RESERVED_LOCK);
if( rc==SQLITE_OK ){
pPager->state = PAGER_RESERVED;
rc = pager_wait_on_lock(pPager, EXCLUSIVE_LOCK);
}
}
- if( rc!=SQLITE_OK ){
- return rc;
- }
- pPager->dirtyCache = 0;
- PAGERTRACE(("TRANSACTION %d\n", PAGERID(pPager)));
- if( pPager->useJournal && !pPager->tempFile
- && pPager->journalMode!=PAGER_JOURNALMODE_OFF ){
+
+ /* If the required locks were successfully obtained, open the journal
+ ** file and write the first journal-header to it.
+ */
+ if( rc==SQLITE_OK && pPager->useJournal
+ && pPager->journalMode!=PAGER_JOURNALMODE_OFF
+ ){
rc = pager_open_journal(pPager);
}
- }else if( pPager->journalOpen && pPager->journalOff==0 ){
+ }else if( isOpen(pPager->jfd) && pPager->journalOff==0 ){
/* This happens when the pager was in exclusive-access mode the last
** time a (read or write) transaction was successfully concluded
** by this connection. Instead of deleting the journal file it was
assert( pPager->nRec==0 );
assert( pPager->dbOrigSize==0 );
assert( pPager->pInJournal==0 );
- sqlite3PagerPagecount(pPager, 0);
- pPager->pInJournal = sqlite3BitvecCreate( pPager->dbSize );
- if( !pPager->pInJournal ){
- rc = SQLITE_NOMEM;
- }else{
- pPager->dbOrigSize = pPager->dbSize;
- rc = writeJournalHdr(pPager);
- }
+ rc = pager_open_journal(pPager);
}
- assert( !pPager->journalOpen || pPager->journalOff>0 || rc!=SQLITE_OK );
+
+ PAGERTRACE(("TRANSACTION %d\n", PAGERID(pPager)));
+ assert( !isOpen(pPager->jfd) || pPager->journalOff>0 || rc!=SQLITE_OK );
return rc;
}
/*
-** Mark a data page as writeable. The page is written into the journal
-** if it is not there already. This routine must be called before making
-** changes to a page.
-**
-** The first time this routine is called, the pager creates a new
-** journal and acquires a RESERVED lock on the database. If the RESERVED
-** lock could not be acquired, this routine returns SQLITE_BUSY. The
-** calling routine must check for that return value and be careful not to
-** change any page data until this routine returns SQLITE_OK.
-**
-** If the journal file could not be written because the disk is full,
-** then this routine returns SQLITE_FULL and does an immediate rollback.
-** All subsequent write attempts also return SQLITE_FULL until there
-** is a call to sqlite3PagerCommit() or sqlite3PagerRollback() to
-** reset.
+** Mark a single data page as writeable. The page is written into the
+** main journal or sub-journal as required. If the page is written into
+** one of the journals, the corresponding bit is set in the
+** Pager.pInJournal bitvec and the PagerSavepoint.pInSavepoint bitvecs
+** of any open savepoints as appropriate.
*/
static int pager_write(PgHdr *pPg){
void *pData = pPg->pData;
CHECK_PAGE(pPg);
- /* If this page was previously acquired with noContent==1, that means
- ** we didn't really read in the content of the page. This can happen
- ** (for example) when the page is being moved to the freelist. But
- ** now we are (perhaps) moving the page off of the freelist for
- ** reuse and we need to know its original content so that content
- ** can be stored in the rollback journal. So do the read at this
- ** time.
- */
- rc = pager_get_content(pPg);
- if( rc ){
- return rc;
- }
-
/* Mark the page as dirty. If the page has already been written
** to the journal then we can return right away.
*/
sqlite3PcacheMakeDirty(pPg);
if( pageInJournal(pPg) && !subjRequiresPage(pPg) ){
- pPager->dirtyCache = 1;
pPager->dbModified = 1;
}else{
** create it if it does not.
*/
assert( pPager->state!=PAGER_UNLOCK );
- rc = sqlite3PagerBegin(pPg, 0);
+ rc = sqlite3PagerBegin(pPager, 0);
if( rc!=SQLITE_OK ){
return rc;
}
assert( pPager->state>=PAGER_RESERVED );
- if( !pPager->journalOpen && pPager->useJournal
+ if( !isOpen(pPager->jfd) && pPager->useJournal
&& pPager->journalMode!=PAGER_JOURNALMODE_OFF ){
rc = pager_open_journal(pPager);
if( rc!=SQLITE_OK ) return rc;
}
- pPager->dirtyCache = 1;
pPager->dbModified = 1;
/* The transaction journal now exists and we have a RESERVED or an
** EXCLUSIVE lock on the main database file. Write the current page to
** the transaction journal if it is not there already.
*/
- if( !pageInJournal(pPg) && pPager->journalOpen ){
+ if( !pageInJournal(pPg) && isOpen(pPager->jfd) ){
if( pPg->pgno<=pPager->dbOrigSize ){
u32 cksum;
char *pData2;
assert( pPager->state>=PAGER_SHARED );
if( pPager->dbSize<pPg->pgno ){
pPager->dbSize = pPg->pgno;
- if( pPager->dbSize==(PAGER_MJ_PGNO(pPager)-1) ){
- pPager->dbSize++;
- }
}
return rc;
}
/*
-** This function is used to mark a data-page as writable. It uses
-** pager_write() to open a journal file (if it is not already open)
-** and write the page *pData to the journal.
+** Mark a data page as writeable. This routine must be called before
+** making changes to a page. The caller must check the return value
+** of this function and be careful not to change any page data unless
+** this routine returns SQLITE_OK.
**
** The difference between this function and pager_write() is that this
** function also deals with the special case where 2 or more pages
** fit on a single disk sector. In this case all co-resident pages
** must have been written to the journal file before returning.
+**
+** If an error occurs, SQLITE_NOMEM or an IO error code is returned
+** as appropriate. Otherwise, SQLITE_OK.
*/
SQLITE_PRIVATE int sqlite3PagerWrite(DbPage *pDbPage){
int rc = SQLITE_OK;
Pgno nPageCount; /* Total number of pages in database file */
Pgno pg1; /* First page of the sector pPg is located on. */
int nPage; /* Number of pages starting at pg1 to journal */
- int ii;
- int needSync = 0;
+ int ii; /* Loop counter */
+ int needSync = 0; /* True if any page has PGHDR_NEED_SYNC */
/* Set the doNotSync flag to 1. This is because we cannot allow a journal
** header to be written between the pages journaled by this function.
** content no longer matters.
**
** The overlying software layer calls this routine when all of the data
-** on the given page is unused. The pager marks the page as clean so
+** on the given page is unused. The pager marks the page as clean so
** that it does not get written to disk.
**
-** Tests show that this optimization, together with the
-** sqlite3PagerDontRollback() below, more than double the speed
-** of large INSERT operations and quadruple the speed of large DELETEs.
-**
-** When this routine is called, set the bit corresponding to pDbPage in
-** the Pager.pAlwaysRollback bitvec. Subsequent calls to
-** sqlite3PagerDontRollback() for the same page will thereafter be ignored.
-** This is necessary to avoid a problem where a page with data is added to
-** the freelist during one part of a transaction then removed from the
-** freelist during a later part of the same transaction and reused for some
-** other purpose. When it is first added to the freelist, this routine is
-** called. When reused, the sqlite3PagerDontRollback() routine is called.
-** But because the page contains critical data, we still need to be sure it
-** gets rolled back in spite of the sqlite3PagerDontRollback() call.
-*/
-SQLITE_PRIVATE int sqlite3PagerDontWrite(DbPage *pDbPage){
- PgHdr *pPg = pDbPage;
+** Tests show that this optimization can quadruple the speed of large
+** DELETE operations.
+*/
+SQLITE_PRIVATE void sqlite3PagerDontWrite(PgHdr *pPg){
Pager *pPager = pPg->pPager;
- int rc;
-
- if( pPg->pgno>pPager->dbOrigSize ){
- return SQLITE_OK;
- }
- if( pPager->pAlwaysRollback==0 ){
- assert( pPager->pInJournal );
- pPager->pAlwaysRollback = sqlite3BitvecCreate(pPager->dbOrigSize);
- if( !pPager->pAlwaysRollback ){
- return SQLITE_NOMEM;
- }
- }
- rc = sqlite3BitvecSet(pPager->pAlwaysRollback, pPg->pgno);
-
- if( rc==SQLITE_OK && (pPg->flags&PGHDR_DIRTY) && pPager->nSavepoint==0 ){
- assert( pPager->state>=PAGER_SHARED );
- if( pPager->dbSize==pPg->pgno && pPager->dbOrigSize<pPager->dbSize ){
- /* If this pages is the last page in the file and the file has grown
- ** during the current transaction, then do NOT mark the page as clean.
- ** When the database file grows, we must make sure that the last page
- ** gets written at least once so that the disk file will be the correct
- ** size. If you do not write this page and the size of the file
- ** on the disk ends up being too small, that can lead to database
- ** corruption during the next transaction.
- */
- }else{
- PAGERTRACE(("DONT_WRITE page %d of %d\n", pPg->pgno, PAGERID(pPager)));
- IOTRACE(("CLEAN %p %d\n", pPager, pPg->pgno))
- pPg->flags |= PGHDR_DONT_WRITE;
+ if( (pPg->flags&PGHDR_DIRTY) && pPager->nSavepoint==0 ){
+ PAGERTRACE(("DONT_WRITE page %d of %d\n", pPg->pgno, PAGERID(pPager)));
+ IOTRACE(("CLEAN %p %d\n", pPager, pPg->pgno))
+ pPg->flags |= PGHDR_DONT_WRITE;
#ifdef SQLITE_CHECK_PAGES
- pPg->pageHash = pager_pagehash(pPg);
+ pPg->pageHash = pager_pagehash(pPg);
#endif
- }
}
- return rc;
}
/*
-** A call to this routine tells the pager that if a rollback occurs,
-** it is not necessary to restore the data on the given page. This
-** means that the pager does not have to record the given page in the
-** rollback journal.
+** This routine is called to increment the value of the database file
+** change-counter, stored as a 4-byte big-endian integer starting at
+** byte offset 24 of the pager file.
**
-** If we have not yet actually read the content of this page (if
-** the PgHdr.needRead flag is set) then this routine acts as a promise
-** that we will never need to read the page content in the future.
-** so the needRead flag can be cleared at this point.
+** If the isDirect flag is zero, then this is done by calling
+** sqlite3PagerWrite() on page 1, then modifying the contents of the
+** page data. In this case the file will be updated when the current
+** transaction is committed.
+**
+** The isDirect flag may only be non-zero if the library was compiled
+** with the SQLITE_ENABLE_ATOMIC_WRITE macro defined. In this case,
+** if isDirect is non-zero, then the database file is updated directly
+** by writing an updated version of page 1 using a call to the
+** sqlite3OsWrite() function.
*/
-SQLITE_PRIVATE void sqlite3PagerDontRollback(DbPage *pPg){
- Pager *pPager = pPg->pPager;
- TESTONLY( int rc; ) /* Return value from sqlite3BitvecSet() */
-
- assert( pPager->state>=PAGER_RESERVED );
-
- /* If the journal file is not open, or DontWrite() has been called on
- ** this page (DontWrite() sets the Pager.pAlwaysRollback bit), then this
- ** function is a no-op.
- */
- if( pPager->journalOpen==0
- || sqlite3BitvecTest(pPager->pAlwaysRollback, pPg->pgno)
- || pPg->pgno>pPager->dbOrigSize
- ){
- return;
- }
-
-#ifdef SQLITE_SECURE_DELETE
- if( sqlite3BitvecTest(pPager->pInJournal, pPg->pgno)!=0
- || pPg->pgno>pPager->dbOrigSize ){
- return;
- }
-#endif
+static int pager_incr_changecounter(Pager *pPager, int isDirectMode){
+ int rc = SQLITE_OK;
- /* If SECURE_DELETE is disabled, then there is no way that this
- ** routine can be called on a page for which sqlite3PagerDontWrite()
- ** has not been previously called during the same transaction.
- ** And if DontWrite() has previously been called, the following
- ** conditions must be met.
+ /* Declare and initialize constant integer 'isDirect'. If the
+ ** atomic-write optimization is enabled in this build, then isDirect
+ ** is initialized to the value passed as the isDirectMode parameter
+ ** to this function. Otherwise, it is always set to zero.
**
- ** (Later:) Not true. If the database is corrupted by having duplicate
- ** pages on the freelist (ex: corrupt9.test) then the following is not
- ** necessarily true:
+ ** The idea is that if the atomic-write optimization is not
+ ** enabled at compile time, the compiler can omit the tests of
+ ** 'isDirect' below, as well as the block enclosed in the
+ ** "if( isDirect )" condition.
*/
- /* assert( !pPg->inJournal && (int)pPg->pgno <= pPager->dbOrigSize ); */
-
- assert( pPager->pInJournal!=0 );
- pPg->flags &= ~PGHDR_NEED_READ;
-
- /* Failure to set the bits in the InJournal bit-vectors is benign.
- ** It merely means that we might do some extra work to journal a page
- ** that does not need to be journaled. Nevertheless, be sure to test the
- ** case where a malloc error occurs while trying to set a bit in a
- ** bit vector.
- */
- sqlite3BeginBenignMalloc();
- TESTONLY( rc = ) sqlite3BitvecSet(pPager->pInJournal, pPg->pgno);
- testcase( rc==SQLITE_NOMEM );
- TESTONLY( rc = ) addToSavepointBitvecs(pPager, pPg->pgno);
- testcase( rc==SQLITE_NOMEM );
- sqlite3EndBenignMalloc();
-
-
- PAGERTRACE(("DONT_ROLLBACK page %d of %d\n", pPg->pgno, PAGERID(pPager)));
- IOTRACE(("GARBAGE %p %d\n", pPager, pPg->pgno))
-}
-
-
-/*
-** This routine is called to increment the database file change-counter,
-** stored at byte 24 of the pager file.
-*/
-static int pager_incr_changecounter(Pager *pPager, int isDirect){
- PgHdr *pPgHdr;
- u32 change_counter;
- int rc = SQLITE_OK;
-
#ifndef SQLITE_ENABLE_ATOMIC_WRITE
- assert( isDirect==0 ); /* isDirect is only true for atomic writes */
+ const int isDirect = 0;
+ assert( isDirectMode==0 );
+ UNUSED_PARAMETER(isDirectMode);
+#else
+ const int isDirect = isDirectMode;
#endif
+
+ assert( pPager->state>=PAGER_RESERVED );
if( !pPager->changeCountDone && pPager->dbSize>0 ){
+ PgHdr *pPgHdr; /* Reference to page 1 */
+ u32 change_counter; /* Initial value of change-counter field */
+
+ assert( !pPager->tempFile && isOpen(pPager->fd) );
+
/* Open page 1 of the file for writing. */
rc = sqlite3PagerGet(pPager, 1, &pPgHdr);
- if( rc!=SQLITE_OK ) return rc;
+ assert( pPgHdr==0 || rc==SQLITE_OK );
- if( !isDirect ){
+ /* If page one was fetched successfully, and this function is not
+ ** operating in direct-mode, make page 1 writable.
+ */
+ if( rc==SQLITE_OK && !isDirect ){
rc = sqlite3PagerWrite(pPgHdr);
- if( rc!=SQLITE_OK ){
- sqlite3PagerUnref(pPgHdr);
- return rc;
- }
}
- /* Increment the value just read and write it back to byte 24. */
- change_counter = sqlite3Get4byte((u8*)pPager->dbFileVers);
- change_counter++;
- put32bits(((char*)pPgHdr->pData)+24, change_counter);
+ if( rc==SQLITE_OK ){
+ /* Increment the value just read and write it back to byte 24. */
+ change_counter = sqlite3Get4byte((u8*)pPager->dbFileVers);
+ change_counter++;
+ put32bits(((char*)pPgHdr->pData)+24, change_counter);
-#ifdef SQLITE_ENABLE_ATOMIC_WRITE
- if( isDirect && pPager->fd->pMethods ){
- const void *zBuf = pPgHdr->pData;
- assert( pPager->dbFileSize>0 );
- rc = sqlite3OsWrite(pPager->fd, zBuf, pPager->pageSize, 0);
+ /* If running in direct mode, write the contents of page 1 to the file. */
+ if( isDirect ){
+ const void *zBuf = pPgHdr->pData;
+ assert( pPager->dbFileSize>0 );
+ rc = sqlite3OsWrite(pPager->fd, zBuf, pPager->pageSize, 0);
+ }
+
+ /* If everything worked, set the changeCountDone flag. */
+ if( rc==SQLITE_OK ){
+ pPager->changeCountDone = 1;
+ }
}
-#endif
/* Release the page reference. */
sqlite3PagerUnref(pPgHdr);
- pPager->changeCountDone = 1;
}
return rc;
}
/*
-** Sync the pager file to disk.
+** Sync the pager file to disk. This is a no-op for in-memory files
+** or pages with the Pager.noSync flag set.
+**
+** If successful, or called on a pager for which it is a no-op, this
+** function returns SQLITE_OK. Otherwise, an IO error code is returned.
*/
SQLITE_PRIVATE int sqlite3PagerSync(Pager *pPager){
- int rc;
- if( MEMDB ){
+ int rc; /* Return code */
+ if( MEMDB || pPager->noSync ){
rc = SQLITE_OK;
}else{
rc = sqlite3OsSync(pPager->fd, pPager->sync_flags);
** journal file. zMaster may be NULL, which is interpreted as no master
** journal (a single database transaction).
**
-** This routine ensures that the journal is synced, all dirty pages written
-** to the database file and the database file synced. The only thing that
-** remains to commit the transaction is to delete the journal file (or
-** master journal file if specified).
+** This routine ensures that:
+**
+** * The database file change-counter is updated,
+** * the journal is synced (unless the atomic-write optimization is used),
+** * all dirty pages are written to the database file,
+** * the database file is truncated (if required), and
+** * the database file synced.
+**
+** The only thing that remains to commit the transaction is to finalize
+** (delete, truncate or zero the first part of) the journal file (or
+** delete the master journal file if specified).
**
** Note that if zMaster==NULL, this does not overwrite a previous value
** passed to an sqlite3PagerCommitPhaseOne() call.
** journal file in this case.
*/
SQLITE_PRIVATE int sqlite3PagerCommitPhaseOne(
- Pager *pPager,
- const char *zMaster,
- int noSync
+ Pager *pPager, /* Pager object */
+ const char *zMaster, /* If not NULL, the master journal name */
+ int noSync /* True to omit the xSync on the db file */
){
- int rc = SQLITE_OK;
+ int rc = SQLITE_OK; /* Return code */
if( pPager->errCode ){
return pPager->errCode;
}
- /* If no changes have been made, we can leave the transaction early.
- */
- if( pPager->dbModified==0 &&
- (pPager->journalMode!=PAGER_JOURNALMODE_DELETE ||
- pPager->exclusiveMode!=0) ){
- assert( pPager->dirtyCache==0 || pPager->journalOpen==0 );
- return SQLITE_OK;
- }
-
PAGERTRACE(("DATABASE SYNC: File=%s zMaster=%s nSize=%d\n",
pPager->zFilename, zMaster, pPager->dbSize));
/* If this is an in-memory db, or no pages have been written to, or this
** function has already been called, it is a no-op.
*/
- if( pPager->state!=PAGER_SYNCED && !MEMDB && pPager->dirtyCache ){
- PgHdr *pPg;
+ if( MEMDB && pPager->dbModified ){
+ sqlite3BackupRestart(pPager->pBackup);
+ }else if( pPager->state!=PAGER_SYNCED && pPager->dbModified ){
-#ifdef SQLITE_ENABLE_ATOMIC_WRITE
- /* The atomic-write optimization can be used if all of the
- ** following are true:
+ /* The following block updates the change-counter. Exactly how it
+ ** does this depends on whether or not the atomic-update optimization
+ ** was enabled at compile time, and if this transaction meets the
+ ** runtime criteria to use the operation:
**
- ** + The file-system supports the atomic-write property for
- ** blocks of size page-size, and
- ** + This commit is not part of a multi-file transaction, and
- ** + Exactly one page has been modified and store in the journal file.
+ ** * The file-system supports the atomic-write property for
+ ** blocks of size page-size, and
+ ** * This commit is not part of a multi-file transaction, and
+ ** * Exactly one page has been modified and store in the journal file.
**
- ** If the optimization can be used, then the journal file will never
- ** be created for this transaction.
+ ** If the optimization was not enabled at compile time, then the
+ ** pager_incr_changecounter() function is called to update the change
+ ** counter in 'indirect-mode'. If the optimization is compiled in but
+ ** is not applicable to this transaction, call sqlite3JournalCreate()
+ ** to make sure the journal file has actually been created, then call
+ ** pager_incr_changecounter() to update the change-counter in indirect
+ ** mode.
+ **
+ ** Otherwise, if the optimization is both enabled and applicable,
+ ** then call pager_incr_changecounter() to update the change-counter
+ ** in 'direct' mode. In this case the journal file will never be
+ ** created for this transaction.
*/
- int useAtomicWrite;
- pPg = sqlite3PcacheDirtyList(pPager->pPCache);
- useAtomicWrite = (
- !zMaster &&
- pPager->journalOpen &&
- pPager->journalOff==jrnlBufferSize(pPager) &&
- pPager->dbSize>=pPager->dbFileSize &&
- (pPg==0 || pPg->pDirty==0)
- );
- assert( pPager->journalOpen || pPager->journalMode==PAGER_JOURNALMODE_OFF );
- if( useAtomicWrite ){
- /* Update the nRec field in the journal file. */
- int offset = pPager->journalHdr + sizeof(aJournalMagic);
- assert(pPager->nRec==1);
- rc = write32bits(pPager->jfd, offset, pPager->nRec);
-
- /* Update the db file change counter. The following call will modify
- ** the in-memory representation of page 1 to include the updated
- ** change counter and then write page 1 directly to the database
- ** file. Because of the atomic-write property of the host file-system,
- ** this is safe.
+#ifdef SQLITE_ENABLE_ATOMIC_WRITE
+ PgHdr *pPg;
+ assert( isOpen(pPager->jfd) || pPager->journalMode==PAGER_JOURNALMODE_OFF );
+ if( !zMaster && isOpen(pPager->jfd)
+ && pPager->journalOff==jrnlBufferSize(pPager)
+ && pPager->dbSize>=pPager->dbFileSize
+ && (0==(pPg = sqlite3PcacheDirtyList(pPager->pPCache)) || 0==pPg->pDirty)
+ ){
+ /* Update the db file change counter via the direct-write method. The
+ ** following call will modify the in-memory representation of page 1
+ ** to include the updated change counter and then write page 1
+ ** directly to the database file. Because of the atomic-write
+ ** property of the host file-system, this is safe.
*/
- if( rc==SQLITE_OK ){
- rc = pager_incr_changecounter(pPager, 1);
- }
+ rc = pager_incr_changecounter(pPager, 1);
}else{
rc = sqlite3JournalCreate(pPager->jfd);
+ if( rc==SQLITE_OK ){
+ rc = pager_incr_changecounter(pPager, 0);
+ }
}
-
- if( !useAtomicWrite && rc==SQLITE_OK )
+#else
+ rc = pager_incr_changecounter(pPager, 0);
#endif
+ if( rc!=SQLITE_OK ) goto commit_phase_one_exit;
- /* If a master journal file name has already been written to the
- ** journal file, then no sync is required. This happens when it is
- ** written, then the process fails to upgrade from a RESERVED to an
- ** EXCLUSIVE lock. The next time the process tries to commit the
- ** transaction the m-j name will have already been written.
+ /* If this transaction has made the database smaller, then all pages
+ ** being discarded by the truncation must be written to the journal
+ ** file. This can only happen in auto-vacuum mode.
+ **
+ ** Before reading the pages with page numbers larger than the
+ ** current value of Pager.dbSize, set dbSize back to the value
+ ** that it took at the start of the transaction. Otherwise, the
+ ** calls to sqlite3PagerGet() return zeroed pages instead of
+ ** reading data from the database file.
*/
- if( !pPager->setMaster ){
- rc = pager_incr_changecounter(pPager, 0);
- if( rc!=SQLITE_OK ) goto sync_exit;
- if( pPager->journalMode!=PAGER_JOURNALMODE_OFF ){
#ifndef SQLITE_OMIT_AUTOVACUUM
- if( pPager->dbSize<pPager->dbOrigSize ){
- /* If this transaction has made the database smaller, then all pages
- ** being discarded by the truncation must be written to the journal
- ** file.
- */
- Pgno i;
- Pgno iSkip = PAGER_MJ_PGNO(pPager);
- Pgno dbSize = pPager->dbSize;
- pPager->dbSize = pPager->dbOrigSize;
- for( i=dbSize+1; i<=pPager->dbOrigSize; i++ ){
- if( !sqlite3BitvecTest(pPager->pInJournal, i) && i!=iSkip ){
- rc = sqlite3PagerGet(pPager, i, &pPg);
- if( rc!=SQLITE_OK ) goto sync_exit;
- rc = sqlite3PagerWrite(pPg);
- sqlite3PagerUnref(pPg);
- if( rc!=SQLITE_OK ) goto sync_exit;
- }
- }
- pPager->dbSize = dbSize;
+ if( pPager->dbSize<pPager->dbOrigSize
+ && pPager->journalMode!=PAGER_JOURNALMODE_OFF
+ ){
+ Pgno i; /* Iterator variable */
+ const Pgno iSkip = PAGER_MJ_PGNO(pPager); /* Pending lock page */
+ const Pgno dbSize = pPager->dbSize; /* Database image size */
+ pPager->dbSize = pPager->dbOrigSize;
+ for( i=dbSize+1; i<=pPager->dbOrigSize; i++ ){
+ if( !sqlite3BitvecTest(pPager->pInJournal, i) && i!=iSkip ){
+ PgHdr *pPage; /* Page to journal */
+ rc = sqlite3PagerGet(pPager, i, &pPage);
+ if( rc!=SQLITE_OK ) goto commit_phase_one_exit;
+ rc = sqlite3PagerWrite(pPage);
+ sqlite3PagerUnref(pPage);
+ if( rc!=SQLITE_OK ) goto commit_phase_one_exit;
}
-#endif
- rc = writeMasterJournal(pPager, zMaster);
- if( rc!=SQLITE_OK ) goto sync_exit;
- rc = syncJournal(pPager);
- }
+ }
+ pPager->dbSize = dbSize;
}
- if( rc!=SQLITE_OK ) goto sync_exit;
+#endif
- /* Write all dirty pages to the database file */
- pPg = sqlite3PcacheDirtyList(pPager->pPCache);
- rc = pager_write_pagelist(pPg);
+ /* Write the master journal name into the journal file. If a master
+ ** journal file name has already been written to the journal file,
+ ** or if zMaster is NULL (no master journal), then this call is a no-op.
+ */
+ rc = writeMasterJournal(pPager, zMaster);
+ if( rc!=SQLITE_OK ) goto commit_phase_one_exit;
+
+ /* Sync the journal file. If the atomic-update optimization is being
+ ** used, this call will not create the journal file or perform any
+ ** real IO.
+ */
+ rc = syncJournal(pPager);
+ if( rc!=SQLITE_OK ) goto commit_phase_one_exit;
+
+ /* Write all dirty pages to the database file. */
+ rc = pager_write_pagelist(sqlite3PcacheDirtyList(pPager->pPCache));
if( rc!=SQLITE_OK ){
assert( rc!=SQLITE_IOERR_BLOCKED );
- /* The error might have left the dirty list all fouled up here,
- ** but that does not matter because if the if the dirty list did
- ** get corrupted, then the transaction will roll back and
- ** discard the dirty list. There is an assert in
- ** pager_get_all_dirty_pages() that verifies that no attempt
- ** is made to use an invalid dirty list.
- */
- goto sync_exit;
+ goto commit_phase_one_exit;
}
sqlite3PcacheCleanAll(pPager->pPCache);
- if( pPager->dbSize<pPager->dbFileSize ){
+ /* If the file on disk is not the same size as the database image,
+ ** then use pager_truncate to grow or shrink the file here.
+ */
+ if( pPager->dbSize!=pPager->dbFileSize ){
+ Pgno nNew = pPager->dbSize - (pPager->dbSize==PAGER_MJ_PGNO(pPager));
assert( pPager->state>=PAGER_EXCLUSIVE );
- rc = pager_truncate(pPager, pPager->dbSize);
- if( rc!=SQLITE_OK ) goto sync_exit;
+ rc = pager_truncate(pPager, nNew);
+ if( rc!=SQLITE_OK ) goto commit_phase_one_exit;
}
- /* Sync the database file. */
+ /* Finally, sync the database file. */
if( !pPager->noSync && !noSync ){
rc = sqlite3OsSync(pPager->fd, pPager->sync_flags);
}
pPager->state = PAGER_SYNCED;
}
-sync_exit:
+commit_phase_one_exit:
if( rc==SQLITE_IOERR_BLOCKED ){
/* pager_incr_changecounter() may attempt to obtain an exclusive
- * lock to spill the cache and return IOERR_BLOCKED. But since
- * there is no chance the cache is inconsistent, it is
- * better to return SQLITE_BUSY.
- */
+ ** lock to spill the cache and return IOERR_BLOCKED. But since
+ ** there is no chance the cache is inconsistent, it is
+ ** better to return SQLITE_BUSY.
+ **/
rc = SQLITE_BUSY;
}
return rc;
/*
-** Commit all changes to the database and release the write lock.
+** When this function is called, the database file has been completely
+** updated to reflect the changes made by the current transaction and
+** synced to disk. The journal file still exists in the file-system
+** though, and if a failure occurs at this point it will eventually
+** be used as a hot-journal and the current transaction rolled back.
**
-** If the commit fails for any reason, a rollback attempt is made
-** and an error code is returned. If the commit worked, SQLITE_OK
-** is returned.
+** This function finalizes the journal file, either by deleting,
+** truncating or partially zeroing it, so that it cannot be used
+** for hot-journal rollback. Once this is done the transaction is
+** irrevocably committed.
+**
+** If an error occurs, an IO error code is returned and the pager
+** moves into the error state. Otherwise, SQLITE_OK is returned.
*/
SQLITE_PRIVATE int sqlite3PagerCommitPhaseTwo(Pager *pPager){
- int rc = SQLITE_OK;
+ int rc = SQLITE_OK; /* Return code */
+ /* Do not proceed if the pager is already in the error state. */
if( pPager->errCode ){
return pPager->errCode;
}
- if( pPager->state<PAGER_RESERVED ){
+
+ /* This function should not be called if the pager is not in at least
+ ** PAGER_RESERVED state. And indeed SQLite never does this. But it is
+ ** nice to have this defensive block here anyway.
+ */
+ if( NEVER(pPager->state<PAGER_RESERVED) ){
return SQLITE_ERROR;
}
- if( pPager->dbModified==0 &&
- (pPager->journalMode!=PAGER_JOURNALMODE_DELETE ||
- pPager->exclusiveMode!=0) ){
- assert( pPager->dirtyCache==0 || pPager->journalOpen==0 );
+
+ /* An optimization. If the database was not actually modified during
+ ** this transaction, the pager is running in exclusive-mode and is
+ ** using persistent journals, then this function is a no-op.
+ **
+ ** The start of the journal file currently contains a single journal
+ ** header with the nRec field set to 0. If such a journal is used as
+ ** a hot-journal during hot-journal rollback, 0 changes will be made
+ ** to the database file. So there is no need to zero the journal
+ ** header. Since the pager is in exclusive mode, there is no need
+ ** to drop any locks either.
+ */
+ if( pPager->dbModified==0 && pPager->exclusiveMode
+ && pPager->journalMode==PAGER_JOURNALMODE_PERSIST
+ ){
+ assert( pPager->journalOff==JOURNAL_HDR_SZ(pPager) );
return SQLITE_OK;
}
+
PAGERTRACE(("COMMIT %d\n", PAGERID(pPager)));
- assert( pPager->state==PAGER_SYNCED || MEMDB || !pPager->dirtyCache );
+ assert( pPager->state==PAGER_SYNCED || MEMDB || !pPager->dbModified );
rc = pager_end_transaction(pPager, pPager->setMaster);
- rc = pager_error(pPager, rc);
- return rc;
+ return pager_error(pPager, rc);
}
/*
-** Rollback all changes. The database falls back to PAGER_SHARED mode.
-** All in-memory cache pages revert to their original data contents.
-** The journal is deleted.
+** Rollback all changes. The database falls back to PAGER_SHARED mode.
+**
+** This function performs two tasks:
+**
+** 1) It rolls back the journal file, restoring all database file and
+** in-memory cache pages to the state they were in when the transaction
+** was opened, and
+** 2) It finalizes the journal file, so that it is not used for hot
+** rollback at any point in the future.
+**
+** subject to the following qualifications:
+**
+** * If the journal file is not yet open when this function is called,
+** then only (2) is performed. In this case there is no journal file
+** to roll back.
+**
+** * If in an error state other than SQLITE_FULL, then task (1) is
+** performed. If successful, task (2). Regardless of the outcome
+** of either, the error state error code is returned to the caller
+** (i.e. either SQLITE_IOERR or SQLITE_CORRUPT).
**
-** This routine cannot fail unless some other process is not following
-** the correct locking protocol or unless some other
-** process is writing trash into the journal file (SQLITE_CORRUPT) or
-** unless a prior malloc() failed (SQLITE_NOMEM). Appropriate error
-** codes are returned for all these occasions. Otherwise,
-** SQLITE_OK is returned.
+** * If the pager is in PAGER_RESERVED state, then attempt (1). Whether
+** or not (1) is succussful, also attempt (2). If successful, return
+** SQLITE_OK. Otherwise, enter the error state and return the first
+** error code encountered.
+**
+** In this case there is no chance that the database was written to.
+** So is safe to finalize the journal file even if the playback
+** (operation 1) failed. However the pager must enter the error state
+** as the contents of the in-memory cache are now suspect.
+**
+** * Finally, if in PAGER_EXCLUSIVE state, then attempt (1). Only
+** attempt (2) if (1) is successful. Return SQLITE_OK if successful,
+** otherwise enter the error state and return the error code from the
+** failing operation.
+**
+** In this case the database file may have been written to. So if the
+** playback operation did not succeed it would not be safe to finalize
+** the journal file. It needs to be left in the file-system so that
+** some other process can use it to restore the database state (by
+** hot-journal rollback).
*/
SQLITE_PRIVATE int sqlite3PagerRollback(Pager *pPager){
- int rc = SQLITE_OK;
+ int rc = SQLITE_OK; /* Return code */
PAGERTRACE(("ROLLBACK %d\n", PAGERID(pPager)));
- if( !pPager->dirtyCache || !pPager->journalOpen ){
+ if( !pPager->dbModified || !isOpen(pPager->jfd) ){
rc = pager_end_transaction(pPager, pPager->setMaster);
}else if( pPager->errCode && pPager->errCode!=SQLITE_FULL ){
if( pPager->state>=PAGER_EXCLUSIVE ){
a[10] = pPager->nWrite;
return a;
}
+#endif
+
+/*
+** Return true if this is an in-memory pager.
+*/
SQLITE_PRIVATE int sqlite3PagerIsMemdb(Pager *pPager){
return MEMDB;
}
-#endif
/*
-** Ensure that there are at least nSavepoint savepoints open.
+** Check that there are at least nSavepoint savepoints open. If there are
+** currently less than nSavepoints open, then open one or more savepoints
+** to make up the difference. If the number of savepoints is already
+** equal to nSavepoint, then this function is a no-op.
+**
+** If a memory allocation fails, SQLITE_NOMEM is returned. If an error
+** occurs while opening the sub-journal file, then an IO error code is
+** returned. Otherwise, SQLITE_OK.
*/
SQLITE_PRIVATE int sqlite3PagerOpenSavepoint(Pager *pPager, int nSavepoint){
- int rc = SQLITE_OK;
+ int rc = SQLITE_OK; /* Return code */
+ int nCurrent = pPager->nSavepoint; /* Current number of savepoints */
- if( nSavepoint>pPager->nSavepoint && pPager->useJournal ){
- int ii;
- PagerSavepoint *aNew;
+ if( nSavepoint>nCurrent && pPager->useJournal ){
+ int ii; /* Iterator variable */
+ PagerSavepoint *aNew; /* New Pager.aSavepoint array */
/* Either there is no active journal or the sub-journal is open or
** the journal is always stored in memory */
- assert( pPager->nSavepoint==0 || pPager->sjfd->pMethods ||
+ assert( pPager->nSavepoint==0 || isOpen(pPager->sjfd) ||
pPager->journalMode==PAGER_JOURNALMODE_MEMORY );
/* Grow the Pager.aSavepoint array using realloc(). Return SQLITE_NOMEM
if( !aNew ){
return SQLITE_NOMEM;
}
- memset(&aNew[pPager->nSavepoint], 0,
- (nSavepoint - pPager->nSavepoint) * sizeof(PagerSavepoint)
- );
+ memset(&aNew[nCurrent], 0, (nSavepoint-nCurrent) * sizeof(PagerSavepoint));
pPager->aSavepoint = aNew;
- ii = pPager->nSavepoint;
pPager->nSavepoint = nSavepoint;
/* Populate the PagerSavepoint structures just allocated. */
- for(/* no-op */; ii<nSavepoint; ii++){
+ for(ii=nCurrent; ii<nSavepoint; ii++){
assert( pPager->dbSizeValid );
aNew[ii].nOrig = pPager->dbSize;
- if( pPager->journalOpen && pPager->journalOff>0 ){
+ if( isOpen(pPager->jfd) && pPager->journalOff>0 ){
aNew[ii].iOffset = pPager->journalOff;
}else{
aNew[ii].iOffset = JOURNAL_HDR_SZ(pPager);
}
- aNew[ii].iSubRec = pPager->stmtNRec;
+ aNew[ii].iSubRec = pPager->nSubRec;
aNew[ii].pInSavepoint = sqlite3BitvecCreate(pPager->dbSize);
if( !aNew[ii].pInSavepoint ){
return SQLITE_NOMEM;
}
/*
+** This function is called to rollback or release (commit) a savepoint.
+** The savepoint to release or rollback need not be the most recently
+** created savepoint.
+**
** Parameter op is always either SAVEPOINT_ROLLBACK or SAVEPOINT_RELEASE.
** If it is SAVEPOINT_RELEASE, then release and destroy the savepoint with
** index iSavepoint. If it is SAVEPOINT_ROLLBACK, then rollback all changes
-** that have occured since savepoint iSavepoint was created.
-**
-** In either case, all savepoints with an index greater than iSavepoint
-** are destroyed.
-**
-** If there are less than (iSavepoint+1) active savepoints when this
-** function is called it is a no-op.
+** that have occured since the specified savepoint was created.
+**
+** The savepoint to rollback or release is identified by parameter
+** iSavepoint. A value of 0 means to operate on the outermost savepoint
+** (the first created). A value of (Pager.nSavepoint-1) means operate
+** on the most recently created savepoint. If iSavepoint is greater than
+** (Pager.nSavepoint-1), then this function is a no-op.
+**
+** If a negative value is passed to this function, then the current
+** transaction is rolled back. This is different to calling
+** sqlite3PagerRollback() because this function does not terminate
+** the transaction or unlock the database, it just restores the
+** contents of the database to its original state.
+**
+** In any case, all savepoints with an index greater than iSavepoint
+** are destroyed. If this is a release operation (op==SAVEPOINT_RELEASE),
+** then savepoint iSavepoint is also destroyed.
+**
+** This function may return SQLITE_NOMEM if a memory allocation fails,
+** or an IO error code if an IO error occurs while rolling back a
+** savepoint. If no errors occur, SQLITE_OK is returned.
*/
SQLITE_PRIVATE int sqlite3PagerSavepoint(Pager *pPager, int op, int iSavepoint){
int rc = SQLITE_OK;
assert( op==SAVEPOINT_RELEASE || op==SAVEPOINT_ROLLBACK );
+ assert( iSavepoint>=0 || op==SAVEPOINT_ROLLBACK );
if( iSavepoint<pPager->nSavepoint ){
- int ii;
- int nNew = iSavepoint + (op==SAVEPOINT_ROLLBACK);
+ int ii; /* Iterator variable */
+ int nNew; /* Number of remaining savepoints after this op. */
+
+ /* Figure out how many savepoints will still be active after this
+ ** operation. Store this value in nNew. Then free resources associated
+ ** with any savepoints that are destroyed by this operation.
+ */
+ nNew = iSavepoint + (op==SAVEPOINT_ROLLBACK);
for(ii=nNew; ii<pPager->nSavepoint; ii++){
sqlite3BitvecDestroy(pPager->aSavepoint[ii].pInSavepoint);
}
pPager->nSavepoint = nNew;
- if( op==SAVEPOINT_ROLLBACK && pPager->jfd->pMethods ){
+ /* If this is a rollback operation, playback the specified savepoint.
+ ** If this is a temp-file, it is possible that the journal file has
+ ** not yet been opened. In this case there have been no changes to
+ ** the database file, so the playback operation can be skipped.
+ */
+ if( op==SAVEPOINT_ROLLBACK && isOpen(pPager->jfd) ){
PagerSavepoint *pSavepoint = (nNew==0)?0:&pPager->aSavepoint[nNew-1];
rc = pagerPlaybackSavepoint(pPager, pSavepoint);
assert(rc!=SQLITE_DONE);
}
/* If this is a release of the outermost savepoint, truncate
- ** the sub-journal. */
- if( nNew==0 && op==SAVEPOINT_RELEASE && pPager->sjfd->pMethods ){
+ ** the sub-journal to zero bytes in size. */
+ if( nNew==0 && op==SAVEPOINT_RELEASE && isOpen(pPager->sjfd) ){
assert( rc==SQLITE_OK );
rc = sqlite3OsTruncate(pPager->sjfd, 0);
- pPager->stmtNRec = 0;
+ pPager->nSubRec = 0;
}
}
return rc;
return pPager->fd;
}
-/*
-** Return the directory of the database file.
-*/
-SQLITE_PRIVATE const char *sqlite3PagerDirname(Pager *pPager){
- return pPager->zDirectory;
-}
-
/*
** Return the full pathname of the journal file.
*/
** moved as part of a database reorganization just before the transaction
** is being committed. In this case, it is guaranteed that the database page
** pPg refers to will not be written to again within this transaction.
+**
+** This function may return SQLITE_NOMEM or an IO error code if an error
+** occurs. Otherwise, it returns SQLITE_OK.
*/
SQLITE_PRIVATE int sqlite3PagerMovepage(Pager *pPager, DbPage *pPg, Pgno pgno, int isCommit){
- PgHdr *pPgOld; /* The page being overwritten. */
- Pgno needSyncPgno = 0;
- int rc;
+ PgHdr *pPgOld; /* The page being overwritten. */
+ Pgno needSyncPgno = 0; /* Old value of pPg->pgno, if sync is required */
+ int rc; /* Return code */
assert( pPg->nRef>0 );
**
** If page X were not written to the sub-journal here, it would not
** be possible to restore its contents when the "ROLLBACK TO one"
- ** statement were processed.
+ ** statement were is processed.
+ **
+ ** subjournalPage() may need to allocate space to store pPg->pgno into
+ ** one or more savepoint bitvecs. This is the reason this function
+ ** may return SQLITE_NOMEM.
*/
if( pPg->flags&PGHDR_DIRTY
&& subjRequiresPage(pPg)
PAGERID(pPager), pPg->pgno, (pPg->flags&PGHDR_NEED_SYNC)?1:0, pgno));
IOTRACE(("MOVE %p %d %d\n", pPager, pPg->pgno, pgno))
- pager_get_content(pPg);
-
/* If the journal needs to be sync()ed before page pPg->pgno can
** be written to, store pPg->pgno in local variable needSyncPgno.
**
}
sqlite3PcacheMakeDirty(pPg);
- pPager->dirtyCache = 1;
pPager->dbModified = 1;
if( needSyncPgno ){
** PAGER_JOURNALMODE_TRUNCATE
** PAGER_JOURNALMODE_PERSIST
** PAGER_JOURNALMODE_OFF
+** PAGER_JOURNALMODE_MEMORY
**
** If the parameter is not _QUERY, then the journal-mode is set to the
** value specified.
**
-** The returned indicate the current (possibly updated)
-** journal-mode.
+** The returned indicate the current (possibly updated) journal-mode.
*/
SQLITE_PRIVATE int sqlite3PagerJournalMode(Pager *pPager, int eMode){
if( !MEMDB ){
return pPager->journalSizeLimit;
}
+/*
+** Return a pointer to the pPager->pBackup variable. The backup module
+** in backup.c maintains the content of this variable. This module
+** uses it opaquely as an argument to sqlite3BackupRestart() and
+** sqlite3BackupUpdate() only.
+*/
+sqlite3_backup **sqlite3PagerBackupPtr(Pager *pPager){
+ return &pPager->pBackup;
+}
+
#endif /* SQLITE_OMIT_DISKIO */
/************** End of pager.c ***********************************************/
u8 sharable; /* True if we can share pBt with another db */
u8 locked; /* True if db currently has pBt locked */
int wantToLock; /* Number of nested calls to sqlite3BtreeEnter() */
+ int nBackup; /* Number of backup operations reading this btree */
Btree *pNext; /* List of other sharable Btrees from the same db */
Btree *pPrev; /* Back pointer of the same list */
};
void *pSchema; /* Pointer to space allocated by sqlite3BtreeSchema() */
void (*xFreeSchema)(void*); /* Destructor for BtShared.pSchema */
sqlite3_mutex *mutex; /* Non-recursive mutex required to access this struct */
+ Bitvec *pHasContent; /* Set of pages moved to free-list this transaction */
#ifndef SQLITE_OMIT_SHARED_CACHE
int nRef; /* Number of references to this structure */
BtShared *pNext; /* Next on a list of sharable BtShared structs */
#define CURSOR_REQUIRESEEK 2
#define CURSOR_FAULT 3
-/* The database page the PENDING_BYTE occupies. This page is never used.
-** TODO: This macro is very similary to PAGER_MJ_PGNO() in pager.c. They
-** should possibly be consolidated (presumably in pager.h).
-**
-** If disk I/O is omitted (meaning that the database is stored purely
-** in memory) then there is no pending byte.
+/*
+** The database page the PENDING_BYTE occupies. This page is never used.
*/
-#ifdef SQLITE_OMIT_DISKIO
-# define PENDING_BYTE_PAGE(pBt) 0x7fffffff
-#else
-# define PENDING_BYTE_PAGE(pBt) ((Pgno)((PENDING_BYTE/(pBt)->pageSize)+1))
-#endif
+# define PENDING_BYTE_PAGE(pBt) PAGER_MJ_PGNO(pBt)
/*
** A linked list of the following structures is stored at BtShared.pLock.
#define invalidateAllOverflowCache(x)
#endif
+/*
+** Set bit pgno of the BtShared.pHasContent bitvec. This is called
+** when a page that previously contained data becomes a free-list leaf
+** page.
+**
+** The BtShared.pHasContent bitvec exists to work around an obscure
+** bug caused by the interaction of two useful IO optimizations surrounding
+** free-list leaf pages:
+**
+** 1) When all data is deleted from a page and the page becomes
+** a free-list leaf page, the page is not written to the database
+** (as free-list leaf pages contain no meaningful data). Sometimes
+** such a page is not even journalled (as it will not be modified,
+** why bother journalling it?).
+**
+** 2) When a free-list leaf page is reused, its content is not read
+** from the database or written to the journal file (why should it
+** be, if it is not at all meaningful?).
+**
+** By themselves, these optimizations work fine and provide a handy
+** performance boost to bulk delete or insert operations. However, if
+** a page is moved to the free-list and then reused within the same
+** transaction, a problem comes up. If the page is not journalled when
+** it is moved to the free-list and it is also not journalled when it
+** is extracted from the free-list and reused, then the original data
+** may be lost. In the event of a rollback, it may not be possible
+** to restore the database to its original configuration.
+**
+** The solution is the BtShared.pHasContent bitvec. Whenever a page is
+** moved to become a free-list leaf page, the corresponding bit is
+** set in the bitvec. Whenever a leaf page is extracted from the free-list,
+** optimization 2 above is ommitted if the corresponding bit is already
+** set in BtShared.pHasContent. The contents of the bitvec are cleared
+** at the end of every transaction.
+*/
+static int btreeSetHasContent(BtShared *pBt, Pgno pgno){
+ int rc = SQLITE_OK;
+ if( !pBt->pHasContent ){
+ int nPage;
+ rc = sqlite3PagerPagecount(pBt->pPager, &nPage);
+ if( rc==SQLITE_OK ){
+ pBt->pHasContent = sqlite3BitvecCreate((u32)nPage);
+ if( !pBt->pHasContent ){
+ rc = SQLITE_NOMEM;
+ }
+ }
+ }
+ if( rc==SQLITE_OK && pgno<=sqlite3BitvecSize(pBt->pHasContent) ){
+ rc = sqlite3BitvecSet(pBt->pHasContent, pgno);
+ }
+ return rc;
+}
+
+/*
+** Query the BtShared.pHasContent vector.
+**
+** This function is called when a free-list leaf page is removed from the
+** free-list for reuse. It returns false if it is safe to retrieve the
+** page from the pager layer with the 'no-content' flag set. True otherwise.
+*/
+static int btreeGetHasContent(BtShared *pBt, Pgno pgno){
+ Bitvec *p = pBt->pHasContent;
+ return (p && (pgno>sqlite3BitvecSize(p) || sqlite3BitvecTest(p, pgno)));
+}
+
+/*
+** Clear (destroy) the BtShared.pHasContent bitvec. This should be
+** invoked at the conclusion of each write-transaction.
+*/
+static void btreeClearHasContent(BtShared *pBt){
+ sqlite3BitvecDestroy(pBt->pHasContent);
+ pBt->pHasContent = 0;
+}
+
/*
** Save the current cursor position in the variables BtCursor.nKey
** and BtCursor.pKey. The cursor's state is set to CURSOR_REQUIRESEEK.
return SQLITE_OK;
}
+/*
+** Retrieve a page from the pager cache. If the requested page is not
+** already in the pager cache return NULL. Initialize the MemPage.pBt and
+** MemPage.aData elements if needed.
+*/
+static MemPage *btreePageLookup(BtShared *pBt, Pgno pgno){
+ DbPage *pDbPage;
+ assert( sqlite3_mutex_held(pBt->mutex) );
+ pDbPage = sqlite3PagerLookup(pBt->pPager, pgno);
+ if( pDbPage ){
+ return btreePageFromDbPage(pDbPage, pgno, pBt);
+ }
+ return 0;
+}
+
/*
** Return the size of the database file in pages. If there is any kind of
** error, return ((unsigned int)-1).
MemPage **ppPage /* Write the page pointer here */
){
int rc;
- DbPage *pDbPage;
MemPage *pPage;
assert( sqlite3_mutex_held(pBt->mutex) );
** pagerPagecount() to make sure pgno is within limits, which results
** in a measureable performance improvements.
*/
- pDbPage = sqlite3PagerLookup(pBt->pPager, pgno);
- if( pDbPage ){
+ *ppPage = pPage = btreePageLookup(pBt, pgno);
+ if( pPage ){
/* Page is already in cache */
- *ppPage = pPage = btreePageFromDbPage(pDbPage, pgno, pBt);
rc = SQLITE_OK;
}else{
/* Page not in cache. Acquire it. */
if( pBt->readOnly ){
rc = SQLITE_READONLY;
}else{
- rc = sqlite3PagerBegin(pBt->pPage1->pDbPage, wrflag>1);
+ rc = sqlite3PagerBegin(pBt->pPager, wrflag>1);
if( rc==SQLITE_OK ){
rc = newDatabase(pBt);
}
rc = SQLITE_DONE;
}else{
invalidateAllOverflowCache(pBt);
- rc = incrVacuumStep(pBt, 0, sqlite3PagerImageSize(pBt->pPager));
+ rc = incrVacuumStep(pBt, 0, pagerPagecount(pBt));
}
sqlite3BtreeLeave(p);
return rc;
/* Set the handles current transaction state to TRANS_NONE and unlock
** the pager if this call closed the only read or write transaction.
*/
+ btreeClearHasContent(pBt);
p->inTrans = TRANS_NONE;
unlockBtreeIfUnused(pBt);
}
}
+ btreeClearHasContent(pBt);
p->inTrans = TRANS_NONE;
pBt->inStmt = 0;
unlockBtreeIfUnused(pBt);
**
** If an error occurs an SQLite error code is returned. Otherwise:
**
-** Unless pPgnoNext is NULL, the page number of the next overflow
-** page in the linked list is written to *pPgnoNext. If page ovfl
-** is the last page in its linked list, *pPgnoNext is set to zero.
+** The page number of the next overflow page in the linked list is
+** written to *pPgnoNext. If page ovfl is the last page in its linked
+** list, *pPgnoNext is set to zero.
**
-** If ppPage is not NULL, *ppPage is set to the MemPage* handle
-** for page ovfl. The underlying pager page may have been requested
-** with the noContent flag set, so the page data accessable via
-** this handle may not be trusted.
+** If ppPage is not NULL, and a reference to the MemPage object corresponding
+** to page number pOvfl was obtained, then *ppPage is set to point to that
+** reference. It is the responsibility of the caller to call releasePage()
+** on *ppPage to free the reference. In no reference was obtained (because
+** the pointer-map was used to obtain the value for *pPgnoNext), then
+** *ppPage is set to zero.
*/
static int getOverflowPage(
BtShared *pBt,
Pgno ovfl, /* Overflow page */
- MemPage **ppPage, /* OUT: MemPage handle */
+ MemPage **ppPage, /* OUT: MemPage handle (may be NULL) */
Pgno *pPgnoNext /* OUT: Next overflow page number */
){
Pgno next = 0;
+ MemPage *pPage = 0;
int rc = SQLITE_OK;
assert( sqlite3_mutex_held(pBt->mutex) );
- /* One of these must not be NULL. Otherwise, why call this function? */
- assert(ppPage || pPgnoNext);
-
- /* If pPgnoNext is NULL, then this function is being called to obtain
- ** a MemPage* reference only. No page-data is required in this case.
- */
- if( !pPgnoNext ){
- return sqlite3BtreeGetPage(pBt, ovfl, ppPage, 1);
- }
+ assert(pPgnoNext);
#ifndef SQLITE_OMIT_AUTOVACUUM
/* Try to find the next page in the overflow list using the
if( iGuess<=pagerPagecount(pBt) ){
rc = ptrmapGet(pBt, iGuess, &eType, &pgno);
- if( rc!=SQLITE_OK ){
- return rc;
- }
- if( eType==PTRMAP_OVERFLOW2 && pgno==ovfl ){
+ if( rc==SQLITE_OK && eType==PTRMAP_OVERFLOW2 && pgno==ovfl ){
next = iGuess;
+ rc = SQLITE_DONE;
}
}
}
#endif
- if( next==0 || ppPage ){
- MemPage *pPage = 0;
-
- rc = sqlite3BtreeGetPage(pBt, ovfl, &pPage, next!=0);
+ if( rc==SQLITE_OK ){
+ rc = sqlite3BtreeGetPage(pBt, ovfl, &pPage, 0);
assert(rc==SQLITE_OK || pPage==0);
if( next==0 && rc==SQLITE_OK ){
next = get4byte(pPage->aData);
}
-
- if( ppPage ){
- *ppPage = pPage;
- }else{
- releasePage(pPage);
- }
}
- *pPgnoNext = next;
- return rc;
+ *pPgnoNext = next;
+ if( ppPage ){
+ *ppPage = pPage;
+ }else{
+ releasePage(pPage);
+ }
+ return (rc==SQLITE_DONE ? SQLITE_OK : rc);
}
/*
iPage = get4byte(&aData[8+closest*4]);
if( !searchList || iPage==nearby ){
+ int noContent;
Pgno nPage;
*pPgno = iPage;
nPage = pagerPagecount(pBt);
}
put4byte(&aData[4], k-1);
assert( sqlite3PagerIswriteable(pTrunk->pDbPage) );
- rc = sqlite3BtreeGetPage(pBt, *pPgno, ppPage, 1);
+ noContent = !btreeGetHasContent(pBt, *pPgno);
+ rc = sqlite3BtreeGetPage(pBt, *pPgno, ppPage, noContent);
if( rc==SQLITE_OK ){
- sqlite3PagerDontRollback((*ppPage)->pDbPage);
rc = sqlite3PagerWrite((*ppPage)->pDbPage);
if( rc!=SQLITE_OK ){
releasePage(*ppPage);
int nPage = pagerPagecount(pBt);
*pPgno = nPage + 1;
+ if( *pPgno==PENDING_BYTE_PAGE(pBt) ){
+ (*pPgno)++;
+ }
+
#ifndef SQLITE_OMIT_AUTOVACUUM
if( pBt->autoVacuum && PTRMAP_ISPAGE(pBt, *pPgno) ){
/* If *pPgno refers to a pointer-map page, allocate two new pages
}
/*
-** Add a page of the database file to the freelist.
+** This function is used to add page iPage to the database file free-list.
+** It is assumed that the page is not already a part of the free-list.
**
-** sqlite3PagerUnref() is NOT called for pPage.
+** The value passed as the second argument to this function is optional.
+** If the caller happens to have a pointer to the MemPage object
+** corresponding to page iPage handy, it may pass it as the second value.
+** Otherwise, it may pass NULL.
+**
+** If a pointer to a MemPage object is passed as the second argument,
+** its reference count is not altered by this function.
*/
-static int freePage(MemPage *pPage){
- BtShared *pBt = pPage->pBt;
- MemPage *pPage1 = pBt->pPage1;
- int rc, n, k;
+static int freePage2(BtShared *pBt, MemPage *pMemPage, Pgno iPage){
+ MemPage *pTrunk = 0; /* Free-list trunk page */
+ Pgno iTrunk = 0; /* Page number of free-list trunk page */
+ MemPage *pPage1 = pBt->pPage1; /* Local reference to page 1 */
+ MemPage *pPage; /* Page being freed. May be NULL. */
+ int rc; /* Return Code */
+ int nFree; /* Initial number of pages on free-list */
- /* Prepare the page for freeing */
- assert( sqlite3_mutex_held(pPage->pBt->mutex) );
- assert( pPage->pgno>1 );
- pPage->isInit = 0;
+ assert( sqlite3_mutex_held(pBt->mutex) );
+ assert( iPage>1 );
+ assert( !pMemPage || pMemPage->pgno==iPage );
+
+ if( pMemPage ){
+ pPage = pMemPage;
+ sqlite3PagerRef(pPage->pDbPage);
+ }else{
+ pPage = btreePageLookup(pBt, iPage);
+ }
/* Increment the free page count on pPage1 */
rc = sqlite3PagerWrite(pPage1->pDbPage);
- if( rc ) return rc;
- n = get4byte(&pPage1->aData[36]);
- put4byte(&pPage1->aData[36], n+1);
+ if( rc ) goto freepage_out;
+ nFree = get4byte(&pPage1->aData[36]);
+ put4byte(&pPage1->aData[36], nFree+1);
#ifdef SQLITE_SECURE_DELETE
/* If the SQLITE_SECURE_DELETE compile-time option is enabled, then
** always fully overwrite deleted information with zeros.
*/
- rc = sqlite3PagerWrite(pPage->pDbPage);
- if( rc ) return rc;
+ if( (!pPage && (rc = sqlite3BtreeGetPage(pBt, iPage, &pPage, 0)))
+ || (rc = sqlite3PagerWrite(pPage->pDbPage))
+ ){
+ goto freepage_out;
+ }
memset(pPage->aData, 0, pPage->pBt->pageSize);
#endif
** to indicate that the page is free.
*/
if( ISAUTOVACUUM ){
- rc = ptrmapPut(pBt, pPage->pgno, PTRMAP_FREEPAGE, 0);
- if( rc ) return rc;
+ rc = ptrmapPut(pBt, iPage, PTRMAP_FREEPAGE, 0);
+ if( rc ) goto freepage_out;
}
- if( n==0 ){
- /* This is the first free page */
- rc = sqlite3PagerWrite(pPage->pDbPage);
- if( rc ) return rc;
- memset(pPage->aData, 0, 8);
- put4byte(&pPage1->aData[32], pPage->pgno);
- TRACE(("FREE-PAGE: %d first\n", pPage->pgno));
- }else{
- /* Other free pages already exist. Retrive the first trunk page
- ** of the freelist and find out how many leaves it has. */
- MemPage *pTrunk;
- rc = sqlite3BtreeGetPage(pBt, get4byte(&pPage1->aData[32]), &pTrunk, 0);
- if( rc ) return rc;
- k = get4byte(&pTrunk->aData[4]);
- if( k>=pBt->usableSize/4 - 8 ){
- /* The trunk is full. Turn the page being freed into a new
- ** trunk page with no leaves.
+ /* Now manipulate the actual database free-list structure. There are two
+ ** possibilities. If the free-list is currently empty, or if the first
+ ** trunk page in the free-list is full, then this page will become a
+ ** new free-list trunk page. Otherwise, it will become a leaf of the
+ ** first trunk page in the current free-list. This block tests if it
+ ** is possible to add the page as a new free-list leaf.
+ */
+ if( nFree!=0 ){
+ int nLeaf; /* Initial number of leaf cells on trunk page */
+
+ iTrunk = get4byte(&pPage1->aData[32]);
+ rc = sqlite3BtreeGetPage(pBt, iTrunk, &pTrunk, 0);
+ if( rc!=SQLITE_OK ){
+ goto freepage_out;
+ }
+
+ nLeaf = get4byte(&pTrunk->aData[4]);
+ if( nLeaf<0 ){
+ rc = SQLITE_CORRUPT_BKPT;
+ goto freepage_out;
+ }
+ if( nLeaf<pBt->usableSize/4 - 8 ){
+ /* In this case there is room on the trunk page to insert the page
+ ** being freed as a new leaf.
**
** Note that the trunk page is not really full until it contains
** usableSize/4 - 2 entries, not usableSize/4 - 8 entries as we have
** to 3.6.0 or later) we should consider fixing the conditional above
** to read "usableSize/4-2" instead of "usableSize/4-8".
*/
- rc = sqlite3PagerWrite(pPage->pDbPage);
- if( rc==SQLITE_OK ){
- put4byte(pPage->aData, pTrunk->pgno);
- put4byte(&pPage->aData[4], 0);
- put4byte(&pPage1->aData[32], pPage->pgno);
- TRACE(("FREE-PAGE: %d new trunk page replacing %d\n",
- pPage->pgno, pTrunk->pgno));
- }
- }else if( k<0 ){
- rc = SQLITE_CORRUPT;
- }else{
- /* Add the newly freed page as a leaf on the current trunk */
rc = sqlite3PagerWrite(pTrunk->pDbPage);
if( rc==SQLITE_OK ){
- put4byte(&pTrunk->aData[4], k+1);
- put4byte(&pTrunk->aData[8+k*4], pPage->pgno);
+ put4byte(&pTrunk->aData[4], nLeaf+1);
+ put4byte(&pTrunk->aData[8+nLeaf*4], iPage);
#ifndef SQLITE_SECURE_DELETE
- rc = sqlite3PagerDontWrite(pPage->pDbPage);
+ if( pPage ){
+ sqlite3PagerDontWrite(pPage->pDbPage);
+ }
#endif
+ rc = btreeSetHasContent(pBt, iPage);
}
TRACE(("FREE-PAGE: %d leaf on trunk page %d\n",pPage->pgno,pTrunk->pgno));
+ goto freepage_out;
}
- releasePage(pTrunk);
}
+
+ /* If control flows to this point, then it was not possible to add the
+ ** the page being freed as a leaf page of the first trunk in the free-list.
+ ** Possibly because the free-list is empty, or possibly because the
+ ** first trunk in the free-list is full. Either way, the page being freed
+ ** will become the new first trunk page in the free-list.
+ */
+ if( ((!pPage) && (0 != (rc = sqlite3BtreeGetPage(pBt, iPage, &pPage, 0))))
+ || (0 != (rc = sqlite3PagerWrite(pPage->pDbPage)))
+ ){
+ goto freepage_out;
+ }
+ put4byte(pPage->aData, iTrunk);
+ put4byte(&pPage->aData[4], 0);
+ put4byte(&pPage1->aData[32], iPage);
+ TRACE(("FREE-PAGE: %d new trunk page replacing %d\n", pPage->pgno, iTrunk));
+
+freepage_out:
+ if( pPage ){
+ pPage->isInit = 0;
+ }
+ releasePage(pPage);
+ releasePage(pTrunk);
return rc;
}
+static int freePage(MemPage *pPage){
+ return freePage2(pPage->pBt, pPage, pPage->pgno);
+}
/*
** Free any overflow pages associated with the given Cell.
Pgno ovflPgno;
int rc;
int nOvfl;
- int ovflPageSize;
+ u16 ovflPageSize;
assert( sqlite3_mutex_held(pPage->pBt->mutex) );
sqlite3BtreeParseCellPtr(pPage, pCell, &info);
return SQLITE_OK; /* No overflow pages. Return without doing anything */
}
ovflPgno = get4byte(&pCell[info.iOverflow]);
+ assert( pBt->usableSize > 4 );
ovflPageSize = pBt->usableSize - 4;
nOvfl = (info.nPayload - info.nLocal + ovflPageSize - 1)/ovflPageSize;
assert( ovflPgno==0 || nOvfl>0 );
while( nOvfl-- ){
- MemPage *pOvfl;
+ Pgno iNext = 0;
+ MemPage *pOvfl = 0;
if( ovflPgno==0 || ovflPgno>pagerPagecount(pBt) ){
return SQLITE_CORRUPT_BKPT;
}
-
- rc = getOverflowPage(pBt, ovflPgno, &pOvfl, (nOvfl==0)?0:&ovflPgno);
- if( rc ) return rc;
- rc = freePage(pOvfl);
- sqlite3PagerUnref(pOvfl->pDbPage);
+ if( nOvfl ){
+ rc = getOverflowPage(pBt, ovflPgno, &pOvfl, &iNext);
+ if( rc ) return rc;
+ }
+ rc = freePage2(pBt, pOvfl, ovflPgno);
+ if( pOvfl ){
+ sqlite3PagerUnref(pOvfl->pDbPage);
+ }
if( rc ) return rc;
+ ovflPgno = iNext;
}
return SQLITE_OK;
}
nSrc = nData;
nData = 0;
}else{
- /* TBD: Perhaps raise SQLITE_CORRUPT if nKey is larger than 31 bits? */
+ if( nKey>0x7fffffff || pKey==0 ){
+ return SQLITE_CORRUPT;
+ }
nPayload += (int)nKey;
pSrc = pKey;
nSrc = (int)nKey;
j--;
sqlite3BtreeParseCellPtr(pNew, apCell[j], &info);
pCell = pTemp;
- fillInCell(pParent, pCell, 0, info.nKey, 0, 0, 0, &sz);
+ rc = fillInCell(pParent, pCell, 0, info.nKey, 0, 0, 0, &sz);
+ if( rc!=SQLITE_OK ){
+ goto balance_cleanup;
+ }
pTemp = 0;
}else{
pCell -= 4;
}
assert( eType!=PTRMAP_ROOTPAGE );
assert( eType!=PTRMAP_FREEPAGE );
- rc = sqlite3PagerWrite(pRoot->pDbPage);
- if( rc!=SQLITE_OK ){
- releasePage(pRoot);
- return rc;
- }
rc = relocatePage(pBt, pRoot, eType, iPtrPage, pgnoMove, 0);
releasePage(pRoot);
return sqlite3PagerFilename(p->pBt->pPager);
}
-/*
-** Return the pathname of the directory that contains the database file.
-**
-** The pager directory name is invariant as long as the pager is
-** open so it is safe to access without the BtShared mutex.
-*/
-SQLITE_PRIVATE const char *sqlite3BtreeGetDirname(Btree *p){
- assert( p->pBt->pPager!=0 );
- return sqlite3PagerDirname(p->pBt->pPager);
-}
-
/*
** Return the pathname of the journal file for this database. The return
** value of this routine is the same regardless of whether the journal file
return sqlite3PagerJournalname(p->pBt->pPager);
}
-#ifndef SQLITE_OMIT_VACUUM
-/*
-** Copy the complete content of pBtFrom into pBtTo. A transaction
-** must be active for both files.
-**
-** The size of file pTo may be reduced by this operation.
-** If anything goes wrong, the transaction on pTo is rolled back.
-**
-** If successful, CommitPhaseOne() may be called on pTo before returning.
-** The caller should finish committing the transaction on pTo by calling
-** sqlite3BtreeCommit().
-*/
-static int btreeCopyFile(Btree *pTo, Btree *pFrom){
- int rc = SQLITE_OK;
- Pgno i;
-
- Pgno nFromPage; /* Number of pages in pFrom */
- Pgno nToPage; /* Number of pages in pTo */
- Pgno nNewPage; /* Number of pages in pTo after the copy */
-
- Pgno iSkip; /* Pending byte page in pTo */
- int nToPageSize; /* Page size of pTo in bytes */
- int nFromPageSize; /* Page size of pFrom in bytes */
-
- BtShared *pBtTo = pTo->pBt;
- BtShared *pBtFrom = pFrom->pBt;
- pBtTo->db = pTo->db;
- pBtFrom->db = pFrom->db;
-
- nToPageSize = pBtTo->pageSize;
- nFromPageSize = pBtFrom->pageSize;
-
- assert( pTo->inTrans==TRANS_WRITE );
- assert( pFrom->inTrans==TRANS_WRITE );
- if( NEVER(pBtTo->pCursor) ){
- return SQLITE_BUSY;
- }
-
- nToPage = pagerPagecount(pBtTo);
- nFromPage = pagerPagecount(pBtFrom);
- iSkip = PENDING_BYTE_PAGE(pBtTo);
-
- /* Variable nNewPage is the number of pages required to store the
- ** contents of pFrom using the current page-size of pTo.
- */
- nNewPage = (Pgno)
- (((i64)nFromPage*(i64)nFromPageSize+(i64)nToPageSize-1)/(i64)nToPageSize);
-
- for(i=1; rc==SQLITE_OK && (i<=nToPage || i<=nNewPage); i++){
-
- /* Journal the original page.
- **
- ** iSkip is the page number of the locking page (PENDING_BYTE_PAGE)
- ** in database *pTo (before the copy). This page is never written
- ** into the journal file. Unless i==iSkip or the page was not
- ** present in pTo before the copy operation, journal page i from pTo.
- */
- if( i!=iSkip && i<=nToPage ){
- DbPage *pDbPage = 0;
- rc = sqlite3PagerGet(pBtTo->pPager, i, &pDbPage);
- if( rc==SQLITE_OK ){
- rc = sqlite3PagerWrite(pDbPage);
- if( rc==SQLITE_OK && i>nFromPage ){
- /* Yeah. It seems wierd to call DontWrite() right after Write(). But
- ** that is because the names of those procedures do not exactly
- ** represent what they do. Write() really means "put this page in the
- ** rollback journal and mark it as dirty so that it will be written
- ** to the database file later." DontWrite() undoes the second part of
- ** that and prevents the page from being written to the database. The
- ** page is still on the rollback journal, though. And that is the
- ** whole point of this block: to put pages on the rollback journal.
- */
- rc = sqlite3PagerDontWrite(pDbPage);
- }
- sqlite3PagerUnref(pDbPage);
- }
- }
-
- /* Overwrite the data in page i of the target database */
- if( rc==SQLITE_OK && i!=iSkip && i<=nNewPage ){
-
- DbPage *pToPage = 0;
- sqlite3_int64 iOff;
-
- rc = sqlite3PagerGet(pBtTo->pPager, i, &pToPage);
- if( rc==SQLITE_OK ){
- rc = sqlite3PagerWrite(pToPage);
- }
-
- for(
- iOff=(i-1)*nToPageSize;
- rc==SQLITE_OK && iOff<i*nToPageSize;
- iOff += nFromPageSize
- ){
- DbPage *pFromPage = 0;
- Pgno iFrom = (Pgno)(iOff/nFromPageSize)+1;
-
- if( iFrom==PENDING_BYTE_PAGE(pBtFrom) ){
- continue;
- }
-
- rc = sqlite3PagerGet(pBtFrom->pPager, iFrom, &pFromPage);
- if( rc==SQLITE_OK ){
- char *zTo = sqlite3PagerGetData(pToPage);
- char *zFrom = sqlite3PagerGetData(pFromPage);
- int nCopy;
-
- if( nFromPageSize>=nToPageSize ){
- zFrom += ((i-1)*nToPageSize - ((iFrom-1)*nFromPageSize));
- nCopy = nToPageSize;
- }else{
- zTo += (((iFrom-1)*nFromPageSize) - (i-1)*nToPageSize);
- nCopy = nFromPageSize;
- }
-
- memcpy(zTo, zFrom, nCopy);
- sqlite3PagerUnref(pFromPage);
- }
- }
-
- if( pToPage ){
- MemPage *p = (MemPage *)sqlite3PagerGetExtra(pToPage);
- p->isInit = 0;
- sqlite3PagerUnref(pToPage);
- }
- }
- }
-
- /* If things have worked so far, the database file may need to be
- ** truncated. The complex part is that it may need to be truncated to
- ** a size that is not an integer multiple of nToPageSize - the current
- ** page size used by the pager associated with B-Tree pTo.
- **
- ** For example, say the page-size of pTo is 2048 bytes and the original
- ** number of pages is 5 (10 KB file). If pFrom has a page size of 1024
- ** bytes and 9 pages, then the file needs to be truncated to 9KB.
- */
- if( rc==SQLITE_OK ){
- sqlite3_file *pFile = sqlite3PagerFile(pBtTo->pPager);
- i64 iSize = (i64)nFromPageSize * (i64)nFromPage;
- i64 iNow = (i64)((nToPage>nNewPage)?nToPage:nNewPage) * (i64)nToPageSize;
- i64 iPending = ((i64)PENDING_BYTE_PAGE(pBtTo)-1) *(i64)nToPageSize;
-
- assert( iSize<=iNow );
-
- /* Commit phase one syncs the journal file associated with pTo
- ** containing the original data. It does not sync the database file
- ** itself. After doing this it is safe to use OsTruncate() and other
- ** file APIs on the database file directly.
- */
- pBtTo->db = pTo->db;
- rc = sqlite3PagerCommitPhaseOne(pBtTo->pPager, 0, 1);
- if( iSize<iNow && rc==SQLITE_OK ){
- rc = sqlite3OsTruncate(pFile, iSize);
- }
-
- /* The loop that copied data from database pFrom to pTo did not
- ** populate the locking page of database pTo. If the page-size of
- ** pFrom is smaller than that of pTo, this means some data will
- ** not have been copied.
- **
- ** This block copies the missing data from database pFrom to pTo
- ** using file APIs. This is safe because at this point we know that
- ** all of the original data from pTo has been synced into the
- ** journal file. At this point it would be safe to do anything at
- ** all to the database file except truncate it to zero bytes.
- */
- if( rc==SQLITE_OK && nFromPageSize<nToPageSize && iSize>iPending){
- i64 iOff;
- for(
- iOff=iPending;
- rc==SQLITE_OK && iOff<(iPending+nToPageSize);
- iOff += nFromPageSize
- ){
- DbPage *pFromPage = 0;
- Pgno iFrom = (Pgno)(iOff/nFromPageSize)+1;
-
- if( iFrom==PENDING_BYTE_PAGE(pBtFrom) || iFrom>nFromPage ){
- continue;
- }
-
- rc = sqlite3PagerGet(pBtFrom->pPager, iFrom, &pFromPage);
- if( rc==SQLITE_OK ){
- char *zFrom = sqlite3PagerGetData(pFromPage);
- rc = sqlite3OsWrite(pFile, zFrom, nFromPageSize, iOff);
- sqlite3PagerUnref(pFromPage);
- }
- }
- }
- }
-
- /* Sync the database file */
- if( rc==SQLITE_OK ){
- rc = sqlite3PagerSync(pBtTo->pPager);
- }
- if( rc==SQLITE_OK ){
- pBtTo->pageSizeFixed = 0;
- }else{
- sqlite3BtreeRollback(pTo);
- }
-
- return rc;
-}
-SQLITE_PRIVATE int sqlite3BtreeCopyFile(Btree *pTo, Btree *pFrom){
- int rc;
- sqlite3BtreeEnter(pTo);
- sqlite3BtreeEnter(pFrom);
- rc = btreeCopyFile(pTo, pFrom);
- sqlite3BtreeLeave(pFrom);
- sqlite3BtreeLeave(pTo);
- return rc;
-}
-
-#endif /* SQLITE_OMIT_VACUUM */
-
/*
** Return non-zero if a transaction is active.
*/
return p->inTrans!=TRANS_NONE;
}
+SQLITE_PRIVATE int sqlite3BtreeIsInBackup(Btree *p){
+ assert( p );
+ assert( sqlite3_mutex_held(p->db->mutex) );
+ return p->nBackup!=0;
+}
+
/*
** This function returns a pointer to a blob of memory associated with
** a single shared-btree. The memory is used by client code for its own
#endif
/************** End of btree.c ***********************************************/
+/************** Begin file backup.c ******************************************/
+/*
+** 2009 January 28
+**
+** 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 file contains the implementation of the sqlite3_backup_XXX()
+** API functions and the related features.
+**
+** $Id$
+*/
+
+/* Macro to find the minimum of two numeric values.
+*/
+#ifndef MIN
+# define MIN(x,y) ((x)<(y)?(x):(y))
+#endif
+
+/*
+** Structure allocated for each backup operation.
+*/
+struct sqlite3_backup {
+ sqlite3* pDestDb; /* Destination database handle */
+ Btree *pDest; /* Destination b-tree file */
+ u32 iDestSchema; /* Original schema cookie in destination */
+ int bDestLocked; /* True once a write-transaction is open on pDest */
+
+ Pgno iNext; /* Page number of the next source page to copy */
+ sqlite3* pSrcDb; /* Source database handle */
+ Btree *pSrc; /* Source b-tree file */
+
+ int rc; /* Backup process error code */
+
+ /* These two variables are set by every call to backup_step(). They are
+ ** read by calls to backup_remaining() and backup_pagecount().
+ */
+ Pgno nRemaining; /* Number of pages left to copy */
+ Pgno nPagecount; /* Total number of pages to copy */
+
+ sqlite3_backup *pNext; /* Next backup associated with source pager */
+};
+
+/*
+** THREAD SAFETY NOTES:
+**
+** Once it has been created using backup_init(), a single sqlite3_backup
+** structure may be accessed via two groups of thread-safe entry points:
+**
+** * Via the sqlite3_backup_XXX() API function backup_step() and
+** backup_finish(). Both these functions obtain the source database
+** handle mutex and the mutex associated with the source BtShared
+** structure, in that order.
+**
+** * Via the BackupUpdate() and BackupRestart() functions, which are
+** invoked by the pager layer to report various state changes in
+** the page cache associated with the source database. The mutex
+** associated with the source database BtShared structure will always
+** be held when either of these functions are invoked.
+**
+** The other sqlite3_backup_XXX() API functions, backup_remaining() and
+** backup_pagecount() are not thread-safe functions. If they are called
+** while some other thread is calling backup_step() or backup_finish(),
+** the values returned may be invalid. There is no way for a call to
+** BackupUpdate() or BackupRestart() to interfere with backup_remaining()
+** or backup_pagecount().
+**
+** Depending on the SQLite configuration, the database handles and/or
+** the Btree objects may have their own mutexes that require locking.
+** Non-sharable Btrees (in-memory databases for example), do not have
+** associated mutexes.
+*/
+
+/*
+** Return a pointer corresponding to database zDb (i.e. "main", "temp")
+** in connection handle pDb. If such a database cannot be found, return
+** a NULL pointer and write an error message to pErrorDb.
+**
+** If the "temp" database is requested, it may need to be opened by this
+** function. If an error occurs while doing so, return 0 and write an
+** error message to pErrorDb.
+*/
+static Btree *findBtree(sqlite3 *pErrorDb, sqlite3 *pDb, const char *zDb){
+ int i = sqlite3FindDbName(pDb, zDb);
+
+ if( i==1 ){
+ Parse sParse;
+ memset(&sParse, 0, sizeof(sParse));
+ sParse.db = pDb;
+ if( sqlite3OpenTempDatabase(&sParse) ){
+ sqlite3ErrorClear(&sParse);
+ sqlite3Error(pErrorDb, sParse.rc, "%s", sParse.zErrMsg);
+ return 0;
+ }
+ assert( sParse.zErrMsg==0 );
+ }
+
+ if( i<0 ){
+ sqlite3Error(pErrorDb, SQLITE_ERROR, "unknown database %s", zDb);
+ return 0;
+ }
+
+ return pDb->aDb[i].pBt;
+}
+
+/*
+** Create an sqlite3_backup process to copy the contents of zSrcDb from
+** connection handle pSrcDb to zDestDb in pDestDb. If successful, return
+** a pointer to the new sqlite3_backup object.
+**
+** If an error occurs, NULL is returned and an error code and error message
+** stored in database handle pDestDb.
+*/
+SQLITE_API sqlite3_backup *sqlite3_backup_init(
+ sqlite3* pDestDb, /* Database to write to */
+ const char *zDestDb, /* Name of database within pDestDb */
+ sqlite3* pSrcDb, /* Database connection to read from */
+ const char *zSrcDb /* Name of database within pSrcDb */
+){
+ sqlite3_backup *p; /* Value to return */
+
+ /* Lock the source database handle. The destination database
+ ** handle is not locked in this routine, but it is locked in
+ ** sqlite3_backup_step(). The user is required to ensure that no
+ ** other thread accesses the destination handle for the duration
+ ** of the backup operation. Any attempt to use the destination
+ ** database connection while a backup is in progress may cause
+ ** a malfunction or a deadlock.
+ */
+ sqlite3_mutex_enter(pSrcDb->mutex);
+ sqlite3_mutex_enter(pDestDb->mutex);
+
+ if( pSrcDb==pDestDb ){
+ sqlite3Error(
+ pDestDb, SQLITE_ERROR, "source and destination must be distinct"
+ );
+ p = 0;
+ }else {
+ /* Allocate space for a new sqlite3_backup object */
+ p = (sqlite3_backup *)sqlite3_malloc(sizeof(sqlite3_backup));
+ if( !p ){
+ sqlite3Error(pDestDb, SQLITE_NOMEM, 0);
+ }
+ }
+
+ /* If the allocation succeeded, populate the new object. */
+ if( p ){
+ memset(p, 0, sizeof(sqlite3_backup));
+ p->pSrc = findBtree(pDestDb, pSrcDb, zSrcDb);
+ p->pDest = findBtree(pDestDb, pDestDb, zDestDb);
+ p->pDestDb = pDestDb;
+ p->pSrcDb = pSrcDb;
+ p->iNext = 1;
+
+ if( 0==p->pSrc || 0==p->pDest ){
+ /* One (or both) of the named databases did not exist. An error has
+ ** already been written into the pDestDb handle. All that is left
+ ** to do here is free the sqlite3_backup structure.
+ */
+ sqlite3_free(p);
+ p = 0;
+ }
+ }
+
+ /* If everything has gone as planned, attach the backup object to the
+ ** source pager. The source pager calls BackupUpdate() and BackupRestart()
+ ** to notify this module if the source file is modified mid-backup.
+ */
+ if( p ){
+ sqlite3_backup **pp; /* Pointer to head of pagers backup list */
+ sqlite3BtreeEnter(p->pSrc);
+ pp = sqlite3PagerBackupPtr(sqlite3BtreePager(p->pSrc));
+ p->pNext = *pp;
+ *pp = p;
+ sqlite3BtreeLeave(p->pSrc);
+ p->pSrc->nBackup++;
+ }
+
+ sqlite3_mutex_leave(pDestDb->mutex);
+ sqlite3_mutex_leave(pSrcDb->mutex);
+ return p;
+}
+
+/*
+** Argument rc is an SQLite error code. Return true if this error is
+** considered fatal if encountered during a backup operation. All errors
+** are considered fatal except for SQLITE_BUSY and SQLITE_LOCKED.
+*/
+static int isFatalError(int rc){
+ return (rc!=SQLITE_OK && rc!=SQLITE_BUSY && rc!=SQLITE_LOCKED);
+}
+
+/*
+** Parameter zSrcData points to a buffer containing the data for
+** page iSrcPg from the source database. Copy this data into the
+** destination database.
+*/
+static int backupOnePage(sqlite3_backup *p, Pgno iSrcPg, const u8 *zSrcData){
+ Pager * const pDestPager = sqlite3BtreePager(p->pDest);
+ const int nSrcPgsz = sqlite3BtreeGetPageSize(p->pSrc);
+ int nDestPgsz = sqlite3BtreeGetPageSize(p->pDest);
+ const int nCopy = MIN(nSrcPgsz, nDestPgsz);
+ const i64 iEnd = (i64)iSrcPg*(i64)nSrcPgsz;
+
+ int rc = SQLITE_OK;
+ i64 iOff;
+
+ assert( p->bDestLocked );
+ assert( !isFatalError(p->rc) );
+ assert( iSrcPg!=PENDING_BYTE_PAGE(p->pSrc->pBt) );
+ assert( zSrcData );
+
+ /* Catch the case where the destination is an in-memory database and the
+ ** page sizes of the source and destination differ.
+ */
+ if( nSrcPgsz!=nDestPgsz && sqlite3PagerIsMemdb(sqlite3BtreePager(p->pDest)) ){
+ rc = SQLITE_READONLY;
+ }
+
+ /* This loop runs once for each destination page spanned by the source
+ ** page. For each iteration, variable iOff is set to the byte offset
+ ** of the destination page.
+ */
+ for(iOff=iEnd-(i64)nSrcPgsz; rc==SQLITE_OK && iOff<iEnd; iOff+=nDestPgsz){
+ DbPage *pDestPg = 0;
+ Pgno iDest = (Pgno)(iOff/nDestPgsz)+1;
+ if( iDest==PENDING_BYTE_PAGE(p->pDest->pBt) ) continue;
+ if( SQLITE_OK==(rc = sqlite3PagerGet(pDestPager, iDest, &pDestPg))
+ && SQLITE_OK==(rc = sqlite3PagerWrite(pDestPg))
+ ){
+ const u8 *zIn = &zSrcData[iOff%nSrcPgsz];
+ u8 *zDestData = sqlite3PagerGetData(pDestPg);
+ u8 *zOut = &zDestData[iOff%nDestPgsz];
+
+ /* Copy the data from the source page into the destination page.
+ ** Then clear the Btree layer MemPage.isInit flag. Both this module
+ ** and the pager code use this trick (clearing the first byte
+ ** of the page 'extra' space to invalidate the Btree layers
+ ** cached parse of the page). MemPage.isInit is marked
+ ** "MUST BE FIRST" for this purpose.
+ */
+ memcpy(zOut, zIn, nCopy);
+ ((u8 *)sqlite3PagerGetExtra(pDestPg))[0] = 0;
+ }
+ sqlite3PagerUnref(pDestPg);
+ }
+
+ return rc;
+}
+
+/*
+** If pFile is currently larger than iSize bytes, then truncate it to
+** exactly iSize bytes. If pFile is not larger than iSize bytes, then
+** this function is a no-op.
+**
+** Return SQLITE_OK if everything is successful, or an SQLite error
+** code if an error occurs.
+*/
+static int backupTruncateFile(sqlite3_file *pFile, i64 iSize){
+ i64 iCurrent;
+ int rc = sqlite3OsFileSize(pFile, &iCurrent);
+ if( rc==SQLITE_OK && iCurrent>iSize ){
+ rc = sqlite3OsTruncate(pFile, iSize);
+ }
+ return rc;
+}
+
+/*
+** Copy nPage pages from the source b-tree to the destination.
+*/
+SQLITE_API int sqlite3_backup_step(sqlite3_backup *p, int nPage){
+ int rc;
+
+ sqlite3_mutex_enter(p->pSrcDb->mutex);
+ sqlite3BtreeEnter(p->pSrc);
+ if( p->pDestDb ){
+ sqlite3_mutex_enter(p->pDestDb->mutex);
+ }
+
+ rc = p->rc;
+ if( !isFatalError(rc) ){
+ Pager * const pSrcPager = sqlite3BtreePager(p->pSrc); /* Source pager */
+ Pager * const pDestPager = sqlite3BtreePager(p->pDest); /* Dest pager */
+ int ii; /* Iterator variable */
+ int nSrcPage = -1; /* Size of source db in pages */
+ int bCloseTrans = 0; /* True if src db requires unlocking */
+
+ /* If the source pager is currently in a write-transaction, return
+ ** SQLITE_LOCKED immediately.
+ */
+ if( p->pDestDb && p->pSrc->pBt->inTransaction==TRANS_WRITE ){
+ rc = SQLITE_LOCKED;
+ }else{
+ rc = SQLITE_OK;
+ }
+
+ /* Lock the destination database, if it is not locked already. */
+ if( SQLITE_OK==rc && p->bDestLocked==0
+ && SQLITE_OK==(rc = sqlite3BtreeBeginTrans(p->pDest, 2))
+ ){
+ p->bDestLocked = 1;
+ rc = sqlite3BtreeGetMeta(p->pDest, 1, &p->iDestSchema);
+ }
+
+ /* If there is no open read-transaction on the source database, open
+ ** one now. If a transaction is opened here, then it will be closed
+ ** before this function exits.
+ */
+ if( rc==SQLITE_OK && 0==sqlite3BtreeIsInReadTrans(p->pSrc) ){
+ rc = sqlite3BtreeBeginTrans(p->pSrc, 0);
+ bCloseTrans = 1;
+ }
+
+ /* Now that there is a read-lock on the source database, query the
+ ** source pager for the number of pages in the database.
+ */
+ if( rc==SQLITE_OK ){
+ rc = sqlite3PagerPagecount(pSrcPager, &nSrcPage);
+ }
+ for(ii=0; (nPage<0 || ii<nPage) && p->iNext<=(Pgno)nSrcPage && !rc; ii++){
+ const Pgno iSrcPg = p->iNext; /* Source page number */
+ if( iSrcPg!=PENDING_BYTE_PAGE(p->pSrc->pBt) ){
+ DbPage *pSrcPg; /* Source page object */
+ rc = sqlite3PagerGet(pSrcPager, iSrcPg, &pSrcPg);
+ if( rc==SQLITE_OK ){
+ rc = backupOnePage(p, iSrcPg, sqlite3PagerGetData(pSrcPg));
+ sqlite3PagerUnref(pSrcPg);
+ }
+ }
+ p->iNext++;
+ }
+ if( rc==SQLITE_OK ){
+ p->nPagecount = nSrcPage;
+ p->nRemaining = nSrcPage+1-p->iNext;
+ if( p->iNext>(Pgno)nSrcPage ){
+ rc = SQLITE_DONE;
+ }
+ }
+
+ if( rc==SQLITE_DONE ){
+ const int nSrcPagesize = sqlite3BtreeGetPageSize(p->pSrc);
+ const int nDestPagesize = sqlite3BtreeGetPageSize(p->pDest);
+ int nDestTruncate;
+
+ /* Update the schema version field in the destination database. This
+ ** is to make sure that the schema-version really does change in
+ ** the case where the source and destination databases have the
+ ** same schema version.
+ */
+ sqlite3BtreeUpdateMeta(p->pDest, 1, p->iDestSchema+1);
+ if( p->pDestDb ){
+ sqlite3ResetInternalSchema(p->pDestDb, 0);
+ }
+
+ /* Set nDestTruncate to the final number of pages in the destination
+ ** database. The complication here is that the destination page
+ ** size may be different to the source page size.
+ **
+ ** If the source page size is smaller than the destination page size,
+ ** round up. In this case the call to sqlite3OsTruncate() below will
+ ** fix the size of the file. However it is important to call
+ ** sqlite3PagerTruncateImage() here so that any pages in the
+ ** destination file that lie beyond the nDestTruncate page mark are
+ ** journalled by PagerCommitPhaseOne() before they are destroyed
+ ** by the file truncation.
+ */
+ if( nSrcPagesize<nDestPagesize ){
+ int ratio = nDestPagesize/nSrcPagesize;
+ nDestTruncate = (nSrcPage+ratio-1)/ratio;
+ if( nDestTruncate==(int)PENDING_BYTE_PAGE(p->pDest->pBt) ){
+ nDestTruncate--;
+ }
+ }else{
+ nDestTruncate = nSrcPage * (nSrcPagesize/nDestPagesize);
+ }
+ sqlite3PagerTruncateImage(pDestPager, nDestTruncate);
+
+ if( nSrcPagesize<nDestPagesize ){
+ /* If the source page-size is smaller than the destination page-size,
+ ** two extra things may need to happen:
+ **
+ ** * The destination may need to be truncated, and
+ **
+ ** * Data stored on the pages immediately following the
+ ** pending-byte page in the source database may need to be
+ ** copied into the destination database.
+ */
+ const i64 iSize = (i64)nSrcPagesize * (i64)nSrcPage;
+ sqlite3_file * const pFile = sqlite3PagerFile(pDestPager);
+
+ assert( pFile );
+ assert( (i64)nDestTruncate*(i64)nDestPagesize >= iSize || (
+ nDestTruncate==(int)(PENDING_BYTE_PAGE(p->pDest->pBt)-1)
+ && iSize>=PENDING_BYTE && iSize<=PENDING_BYTE+nDestPagesize
+ ));
+ if( SQLITE_OK==(rc = sqlite3PagerCommitPhaseOne(pDestPager, 0, 1))
+ && SQLITE_OK==(rc = backupTruncateFile(pFile, iSize))
+ && SQLITE_OK==(rc = sqlite3PagerSync(pDestPager))
+ ){
+ i64 iOff;
+ i64 iEnd = MIN(PENDING_BYTE + nDestPagesize, iSize);
+ for(
+ iOff=PENDING_BYTE+nSrcPagesize;
+ rc==SQLITE_OK && iOff<iEnd;
+ iOff+=nSrcPagesize
+ ){
+ PgHdr *pSrcPg = 0;
+ const Pgno iSrcPg = (Pgno)((iOff/nSrcPagesize)+1);
+ rc = sqlite3PagerGet(pSrcPager, iSrcPg, &pSrcPg);
+ if( rc==SQLITE_OK ){
+ u8 *zData = sqlite3PagerGetData(pSrcPg);
+ rc = sqlite3OsWrite(pFile, zData, nSrcPagesize, iOff);
+ }
+ sqlite3PagerUnref(pSrcPg);
+ }
+ }
+ }else{
+ rc = sqlite3PagerCommitPhaseOne(pDestPager, 0, 0);
+ }
+
+ /* Finish committing the transaction to the destination database. */
+ if( SQLITE_OK==rc
+ && SQLITE_OK==(rc = sqlite3BtreeCommitPhaseTwo(p->pDest))
+ ){
+ rc = SQLITE_DONE;
+ }
+ }
+
+ /* If bCloseTrans is true, then this function opened a read transaction
+ ** on the source database. Close the read transaction here. There is
+ ** no need to check the return values of the btree methods here, as
+ ** "committing" a read-only transaction cannot fail.
+ */
+ if( bCloseTrans ){
+ TESTONLY( int rc2 );
+ TESTONLY( rc2 = ) sqlite3BtreeCommitPhaseOne(p->pSrc, 0);
+ TESTONLY( rc2 |= ) sqlite3BtreeCommitPhaseTwo(p->pSrc);
+ assert( rc2==SQLITE_OK );
+ }
+
+ p->rc = rc;
+ }
+ if( p->pDestDb ){
+ sqlite3_mutex_leave(p->pDestDb->mutex);
+ }
+ sqlite3BtreeLeave(p->pSrc);
+ sqlite3_mutex_leave(p->pSrcDb->mutex);
+ return rc;
+}
+
+/*
+** Release all resources associated with an sqlite3_backup* handle.
+*/
+SQLITE_API int sqlite3_backup_finish(sqlite3_backup *p){
+ sqlite3_backup **pp; /* Ptr to head of pagers backup list */
+ sqlite3_mutex *mutex; /* Mutex to protect source database */
+ int rc; /* Value to return */
+
+ /* Enter the mutexes */
+ sqlite3_mutex_enter(p->pSrcDb->mutex);
+ sqlite3BtreeEnter(p->pSrc);
+ mutex = p->pSrcDb->mutex;
+ if( p->pDestDb ){
+ sqlite3_mutex_enter(p->pDestDb->mutex);
+ }
+
+ /* Detach this backup from the source pager. */
+ if( p->pDestDb ){
+ pp = sqlite3PagerBackupPtr(sqlite3BtreePager(p->pSrc));
+ while( *pp!=p ){
+ pp = &(*pp)->pNext;
+ }
+ *pp = p->pNext;
+ p->pSrc->nBackup--;
+ }
+
+ /* If a transaction is still open on the Btree, roll it back. */
+ sqlite3BtreeRollback(p->pDest);
+
+ /* Set the error code of the destination database handle. */
+ rc = (p->rc==SQLITE_DONE) ? SQLITE_OK : p->rc;
+ sqlite3Error(p->pDestDb, rc, 0);
+
+ /* Exit the mutexes and free the backup context structure. */
+ if( p->pDestDb ){
+ sqlite3_mutex_leave(p->pDestDb->mutex);
+ }
+ sqlite3BtreeLeave(p->pSrc);
+ if( p->pDestDb ){
+ sqlite3_free(p);
+ }
+ sqlite3_mutex_leave(mutex);
+ return rc;
+}
+
+/*
+** Return the number of pages still to be backed up as of the most recent
+** call to sqlite3_backup_step().
+*/
+SQLITE_API int sqlite3_backup_remaining(sqlite3_backup *p){
+ return p->nRemaining;
+}
+
+/*
+** Return the total number of pages in the source database as of the most
+** recent call to sqlite3_backup_step().
+*/
+SQLITE_API int sqlite3_backup_pagecount(sqlite3_backup *p){
+ return p->nPagecount;
+}
+
+/*
+** This function is called after the contents of page iPage of the
+** source database have been modified. If page iPage has already been
+** copied into the destination database, then the data written to the
+** destination is now invalidated. The destination copy of iPage needs
+** to be updated with the new data before the backup operation is
+** complete.
+**
+** It is assumed that the mutex associated with the BtShared object
+** corresponding to the source database is held when this function is
+** called.
+*/
+SQLITE_PRIVATE void sqlite3BackupUpdate(sqlite3_backup *pBackup, Pgno iPage, const u8 *aData){
+ sqlite3_backup *p; /* Iterator variable */
+ for(p=pBackup; p; p=p->pNext){
+ assert( sqlite3_mutex_held(p->pSrc->pBt->mutex) );
+ if( !isFatalError(p->rc) && iPage<p->iNext ){
+ /* The backup process p has already copied page iPage. But now it
+ ** has been modified by a transaction on the source pager. Copy
+ ** the new data into the backup.
+ */
+ int rc = backupOnePage(p, iPage, aData);
+ assert( rc!=SQLITE_BUSY && rc!=SQLITE_LOCKED );
+ if( rc!=SQLITE_OK ){
+ p->rc = rc;
+ }
+ }
+ }
+}
+
+/*
+** Restart the backup process. This is called when the pager layer
+** detects that the database has been modified by an external database
+** connection. In this case there is no way of knowing which of the
+** pages that have been copied into the destination database are still
+** valid and which are not, so the entire process needs to be restarted.
+**
+** It is assumed that the mutex associated with the BtShared object
+** corresponding to the source database is held when this function is
+** called.
+*/
+SQLITE_PRIVATE void sqlite3BackupRestart(sqlite3_backup *pBackup){
+ sqlite3_backup *p; /* Iterator variable */
+ for(p=pBackup; p; p=p->pNext){
+ assert( sqlite3_mutex_held(p->pSrc->pBt->mutex) );
+ p->iNext = 1;
+ }
+}
+
+#ifndef SQLITE_OMIT_VACUUM
+/*
+** Copy the complete content of pBtFrom into pBtTo. A transaction
+** must be active for both files.
+**
+** The size of file pTo may be reduced by this operation. If anything
+** goes wrong, the transaction on pTo is rolled back. If successful, the
+** transaction is committed before returning.
+*/
+SQLITE_PRIVATE int sqlite3BtreeCopyFile(Btree *pTo, Btree *pFrom){
+ int rc;
+ sqlite3_backup b;
+ sqlite3BtreeEnter(pTo);
+ sqlite3BtreeEnter(pFrom);
+
+ /* Set up an sqlite3_backup object. sqlite3_backup.pDestDb must be set
+ ** to 0. This is used by the implementations of sqlite3_backup_step()
+ ** and sqlite3_backup_finish() to detect that they are being called
+ ** from this function, not directly by the user.
+ */
+ memset(&b, 0, sizeof(b));
+ b.pSrcDb = pFrom->db;
+ b.pSrc = pFrom;
+ b.pDest = pTo;
+ b.iNext = 1;
+
+ /* 0x7FFFFFFF is the hard limit for the number of pages in a database
+ ** file. By passing this as the number of pages to copy to
+ ** sqlite3_backup_step(), we can guarantee that the copy finishes
+ ** within a single call (unless an error occurs). The assert() statement
+ ** checks this assumption - (p->rc) should be set to either SQLITE_DONE
+ ** or an error code.
+ */
+ sqlite3_backup_step(&b, 0x7FFFFFFF);
+ assert( b.rc!=SQLITE_OK );
+ rc = sqlite3_backup_finish(&b);
+ if( rc==SQLITE_OK ){
+ pTo->pBt->pageSizeFixed = 0;
+ }
+
+ sqlite3BtreeLeave(pFrom);
+ sqlite3BtreeLeave(pTo);
+ return rc;
+}
+#endif /* SQLITE_OMIT_VACUUM */
+
+/************** End of backup.c **********************************************/
/************** Begin file vdbemem.c *****************************************/
/*
** 2004 May 26
}else if( pMem->flags & MEM_Int ){
return (double)pMem->u.i;
}else if( pMem->flags & (MEM_Str|MEM_Blob) ){
- double val = 0.0;
+ /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
+ double val = (double)0;
pMem->flags |= MEM_Str;
if( sqlite3VdbeChangeEncoding(pMem, SQLITE_UTF8)
|| sqlite3VdbeMemNulTerminate(pMem) ){
- return 0.0;
+ /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
+ return (double)0;
}
assert( pMem->z );
sqlite3AtoF(pMem->z, &val);
return val;
}else{
- return 0.0;
+ /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
+ return (double)0;
}
}
return rc;
}
-#if 0
-/*
-** Perform various checks on the memory cell pMem. An assert() will
-** fail if pMem is internally inconsistent.
-*/
-SQLITE_PRIVATE void sqlite3VdbeMemSanity(Mem *pMem){
- int flags = pMem->flags;
- assert( flags!=0 ); /* Must define some type */
- if( flags & (MEM_Str|MEM_Blob) ){
- int x = flags & (MEM_Static|MEM_Dyn|MEM_Ephem|MEM_Short);
- assert( x!=0 ); /* Strings must define a string subtype */
- assert( (x & (x-1))==0 ); /* Only one string subtype can be defined */
- assert( pMem->z!=0 ); /* Strings must have a value */
- /* Mem.z points to Mem.zShort iff the subtype is MEM_Short */
- assert( (x & MEM_Short)==0 || pMem->z==pMem->zShort );
- assert( (x & MEM_Short)!=0 || pMem->z!=pMem->zShort );
- /* No destructor unless there is MEM_Dyn */
- assert( pMem->xDel==0 || (pMem->flags & MEM_Dyn)!=0 );
-
- if( (flags & MEM_Str) ){
- assert( pMem->enc==SQLITE_UTF8 ||
- pMem->enc==SQLITE_UTF16BE ||
- pMem->enc==SQLITE_UTF16LE
- );
- /* If the string is UTF-8 encoded and nul terminated, then pMem->n
- ** must be the length of the string. (Later:) If the database file
- ** has been corrupted, '\000' characters might have been inserted
- ** into the middle of the string. In that case, the sqlite3Strlen30()
- ** might be less.
- */
- if( pMem->enc==SQLITE_UTF8 && (flags & MEM_Term) ){
- assert( sqlite3Strlen30(pMem->z)<=pMem->n );
- assert( pMem->z[pMem->n]==0 );
- }
- }
- }else{
- /* Cannot define a string subtype for non-string objects */
- assert( (pMem->flags & (MEM_Static|MEM_Dyn|MEM_Ephem|MEM_Short))==0 );
- assert( pMem->xDel==0 );
- }
- /* MEM_Null excludes all other types */
- assert( (pMem->flags&(MEM_Str|MEM_Int|MEM_Real|MEM_Blob))==0
- || (pMem->flags&MEM_Null)==0 );
- /* If the MEM is both real and integer, the values are equal */
- assert( (pMem->flags & (MEM_Int|MEM_Real))!=(MEM_Int|MEM_Real)
- || pMem->r==pMem->u.i );
-}
-#endif
-
/* This function is only available internally, it is not part of the
** external API. It works in a similar way to sqlite3_value_text(),
** except the data returned is in the encoding specified by the second
}else if( op==TK_UMINUS ) {
if( SQLITE_OK==sqlite3ValueFromExpr(db,pExpr->pLeft,enc,affinity,&pVal) ){
pVal->u.i = -1 * pVal->u.i;
- pVal->r = -1.0 * pVal->r;
+ /* (double)-1 In case of SQLITE_OMIT_FLOATING_POINT... */
+ pVal->r = (double)-1 * pVal->r;
}
}
#ifndef SQLITE_OMIT_BLOB_LITERAL
pOp = &p->aOp[0];
if( pOp->opcode==OP_Trace && pOp->p4.z!=0 ){
const char *z = pOp->p4.z;
- while( isspace(*(u8*)z) ) z++;
+ while( sqlite3Isspace(*z) ) z++;
printf("SQL: [%s]\n", z);
}
}
int i, j;
char z[1000];
sqlite3_snprintf(sizeof(z), z, "%s", pOp->p4.z);
- for(i=0; isspace((unsigned char)z[i]); i++){}
+ for(i=0; sqlite3Isspace(z[i]); i++){}
for(j=0; z[i]; i++){
- if( isspace((unsigned char)z[i]) ){
+ if( sqlite3Isspace(z[i]) ){
if( z[i-1]!=' ' ){
z[j++] = ' ';
}
if( 0==sqlite3Strlen30(sqlite3BtreeGetFilename(db->aDb[0].pBt))
|| nTrans<=1
){
- for(i=0; rc==SQLITE_OK && i<db->nDb; i++){
+ for(i=0; rc==SQLITE_OK && i<db->nDb; i++){
Btree *pBt = db->aDb[i].pBt;
if( pBt ){
rc = sqlite3BtreeCommitPhaseOne(pBt, 0);
/* Sync the master journal file. If the IOCAP_SEQUENTIAL device
** flag is set this is not required.
*/
- zMainFile = sqlite3BtreeGetDirname(db->aDb[0].pBt);
- if( (needSync
- && (0==(sqlite3OsDeviceCharacteristics(pMaster)&SQLITE_IOCAP_SEQUENTIAL))
- && (rc=sqlite3OsSync(pMaster, SQLITE_SYNC_NORMAL))!=SQLITE_OK) ){
+ if( needSync
+ && 0==(sqlite3OsDeviceCharacteristics(pMaster)&SQLITE_IOCAP_SEQUENTIAL)
+ && SQLITE_OK!=(rc = sqlite3OsSync(pMaster, SQLITE_SYNC_NORMAL))
+ ){
sqlite3OsCloseFree(pMaster);
sqlite3OsDelete(pVfs, zMaster, 0);
sqlite3DbFree(db, zMaster);
vals = sqlite3_data_count(pStmt);
pOut = &pVm->pResultSet[i];
}else{
- static const Mem nullMem = {{0}, 0.0, 0, "", 0, MEM_Null, SQLITE_NULL, 0, 0, 0 };
+ /* ((double)0) In case of SQLITE_OMIT_FLOATING_POINT... */
+ static const Mem nullMem = {{0}, (double)0, 0, "", 0, MEM_Null, SQLITE_NULL, 0, 0, 0 };
if( pVm->db ){
sqlite3_mutex_enter(pVm->db->mutex);
sqlite3Error(pVm->db, SQLITE_RANGE, 0);
case OP_Subtract: b -= a; break;
case OP_Multiply: b *= a; break;
case OP_Divide: {
- if( a==0.0 ) goto arithmetic_result_is_null;
+ /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
+ if( a==(double)0 ) goto arithmetic_result_is_null;
b /= a;
break;
}
c = pOp->p3;
}else{
#ifdef SQLITE_OMIT_FLOATING_POINT
- c = sqlite3VdbeIntValue(pIn1);
+ c = sqlite3VdbeIntValue(pIn1)!=0;
#else
c = sqlite3VdbeRealValue(pIn1)!=0.0;
#endif
** larger than the previous rowid. This has been shown experimentally
** to double the speed of the COPY operation.
*/
- int res, rx=SQLITE_OK, cnt;
+ int res=0, rx=SQLITE_OK, cnt;
i64 x;
cnt = 0;
if( (sqlite3BtreeFlags(pC->pCursor)&(BTREE_INTKEY|BTREE_ZERODATA)) !=
*/
case OP_Delete: {
int i = pOp->p1;
- i64 iKey;
+ i64 iKey = 0;
VdbeCursor *pC;
assert( i>=0 && i<p->nCursor );
/* Opcode: IdxInsert P1 P2 P3 * *
**
** Register P2 holds a SQL index key made using the
-** MakeIdxRec instructions. This opcode writes that key
+** MakeRecord instructions. This opcode writes that key
** into the index P1. Data for the entry is nil.
**
** P3 is a flag that provides a hint to the b-tree layer that this
** the end of the index key pointed to by cursor P1. This integer should be
** the rowid of the table entry to which this index entry points.
**
-** See also: Rowid, MakeIdxRec.
+** See also: Rowid, MakeRecord.
*/
case OP_IdxRowid: { /* out2-prerelease */
int i = pOp->p1;
**
** 1) The in-memory representation grows too large for the allocated
** buffer, or
-** 2) The xSync() method is called.
+** 2) The sqlite3JournalCreate() function is called.
*/
JournalFile *p = (JournalFile *)pJfd;
if( p->pReal ){
rc = sqlite3OsRead(p->pReal, zBuf, iAmt, iOfst);
+ }else if( (iAmt+iOfst)>p->iSize ){
+ rc = SQLITE_IOERR_SHORT_READ;
}else{
- assert( iAmt+iOfst<=p->iSize );
memcpy(zBuf, &p->zBuf[iOfst], iAmt);
}
return rc;
*/
static void codeReal(Vdbe *v, const char *z, int n, int negateFlag, int iMem){
assert( z || v==0 || sqlite3VdbeDb(v)->mallocFailed );
- assert( !z || !isdigit(z[n]) );
+ assert( !z || !sqlite3Isdigit(z[n]) );
UNUSED_PARAMETER(n);
if( z ){
double value;
}else if( (z = (char*)pExpr->token.z)!=0 ){
int i;
int n = pExpr->token.n;
- assert( !isdigit(z[n]) );
+ assert( !sqlite3Isdigit(z[n]) );
if( sqlite3GetInt32(z, &i) ){
if( negFlag ) i = -i;
sqlite3VdbeAddOp2(v, OP_Integer, i, iMem);
case TK_UMINUS: {
Expr *pLeft = pExpr->pLeft;
assert( pLeft );
- if( pLeft->op==TK_FLOAT || pLeft->op==TK_INTEGER ){
- if( pLeft->op==TK_FLOAT ){
- codeReal(v, (char*)pLeft->token.z, pLeft->token.n, 1, target);
- }else{
- codeInteger(v, pLeft, 1, target);
- }
+ if( pLeft->op==TK_FLOAT ){
+ codeReal(v, (char*)pLeft->token.z, pLeft->token.n, 1, target);
+ }else if( pLeft->op==TK_INTEGER ){
+ codeInteger(v, pLeft, 1, target);
}else{
regFree1 = r1 = sqlite3GetTempReg(pParse);
sqlite3VdbeAddOp2(v, OP_Integer, 0, r1);
assert( sqlite3BtreeHoldsAllMutexes(db) );
iDb = sqlite3SchemaToIndex(db, pNew->pSchema);
zDb = db->aDb[iDb].zName;
- zTab = pNew->zName;
+ zTab = &pNew->zName[16]; /* Skip the "sqlite_altertab_" prefix on the name */
pCol = &pNew->aCol[pNew->nCol-1];
pDflt = pCol->pDflt;
pTab = sqlite3FindTable(db, zTab, zDb);
zCol = sqlite3DbStrNDup(db, (char*)pColDef->z, pColDef->n);
if( zCol ){
char *zEnd = &zCol[pColDef->n-1];
- while( (zEnd>zCol && *zEnd==';') || isspace(*(unsigned char *)zEnd) ){
+ while( (zEnd>zCol && *zEnd==';') || sqlite3Isspace(*zEnd) ){
*zEnd-- = '\0';
}
sqlite3NestedParse(pParse,
iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
/* Put a copy of the Table struct in Parse.pNewTable for the
- ** sqlite3AddColumn() function and friends to modify.
+ ** sqlite3AddColumn() function and friends to modify. But modify
+ ** the name by adding an "sqlite_altertab_" prefix. By adding this
+ ** prefix, we insure that the name will not collide with an existing
+ ** table because user table are not allowed to have the "sqlite_"
+ ** prefix on their name.
*/
pNew = (Table*)sqlite3DbMallocZero(db, sizeof(Table));
if( !pNew ) goto exit_begin_add_column;
nAlloc = (((pNew->nCol-1)/8)*8)+8;
assert( nAlloc>=pNew->nCol && nAlloc%8==0 && nAlloc-pNew->nCol<8 );
pNew->aCol = (Column*)sqlite3DbMallocZero(db, sizeof(Column)*nAlloc);
- pNew->zName = sqlite3DbStrDup(db, pTab->zName);
+ pNew->zName = sqlite3MPrintf(db, "sqlite_altertab_%s", pTab->zName);
if( !pNew->aCol || !pNew->zName ){
db->mallocFailed = 1;
goto exit_begin_add_column;
/* Load new statistics out of the sqlite_stat1 table */
zSql = sqlite3MPrintf(db, "SELECT idx, stat FROM %Q.sqlite_stat1",
sInfo.zDatabase);
- (void)sqlite3SafetyOff(db);
- rc = sqlite3_exec(db, zSql, analysisLoader, &sInfo, 0);
- (void)sqlite3SafetyOn(db);
- sqlite3DbFree(db, zSql);
+ if( zSql==0 ){
+ rc = SQLITE_NOMEM;
+ }else{
+ (void)sqlite3SafetyOff(db);
+ rc = sqlite3_exec(db, zSql, analysisLoader, &sInfo, 0);
+ (void)sqlite3SafetyOn(db);
+ sqlite3DbFree(db, zSql);
+ if( rc==SQLITE_NOMEM ) db->mallocFailed = 1;
+ }
return rc;
}
"cannot DETACH database within transaction");
goto detach_error;
}
- if( sqlite3BtreeIsInReadTrans(pDb->pBt) ){
+ if( sqlite3BtreeIsInReadTrans(pDb->pBt) || sqlite3BtreeIsInBackup(pDb->pBt) ){
sqlite3_snprintf(sizeof(zErr),zErr, "database %s is locked", zName);
goto detach_error;
}
** it is not unlinked from the Table that it indexes.
** Unlinking from the Table must be done by the calling function.
*/
-static void sqliteDeleteIndex(Index *p){
+static void sqlite3DeleteIndex(Index *p){
Index *pOld;
const char *zName = p->zName;
** if there were schema changes during the transaction or if a
** schema-cookie mismatch occurs.
**
-** If iDb<=0 then reset the internal schema tables for all database
-** files. If iDb>=2 then reset the internal schema for only the
+** If iDb==0 then reset the internal schema tables for all database
+** files. If iDb>=1 then reset the internal schema for only the
** single file indicated.
*/
SQLITE_PRIVATE void sqlite3ResetInternalSchema(sqlite3 *db, int iDb){
for(pIndex = pTable->pIndex; pIndex; pIndex=pNext){
pNext = pIndex->pNext;
assert( pIndex->pSchema==pTable->pSchema );
- sqliteDeleteIndex(pIndex);
+ sqlite3DeleteIndex(pIndex);
}
#ifndef SQLITE_OMIT_FOREIGN_KEY
}
/*
-** The token *pName contains the name of a database (either "main" or
-** "temp" or the name of an attached db). This routine returns the
-** index of the named database in db->aDb[], or -1 if the named db
-** does not exist.
+** Parameter zName points to a nul-terminated buffer containing the name
+** of a database ("main", "temp" or the name of an attached db). This
+** function returns the index of the named database in db->aDb[], or
+** -1 if the named db cannot be found.
*/
-SQLITE_PRIVATE int sqlite3FindDb(sqlite3 *db, Token *pName){
- int i = -1; /* Database number */
- int n; /* Number of characters in the name */
- Db *pDb; /* A database whose name space is being searched */
- char *zName; /* Name we are searching for */
-
- zName = sqlite3NameFromToken(db, pName);
+SQLITE_PRIVATE int sqlite3FindDbName(sqlite3 *db, const char *zName){
+ int i = -1; /* Database number */
if( zName ){
- n = sqlite3Strlen30(zName);
+ Db *pDb;
+ int n = sqlite3Strlen30(zName);
for(i=(db->nDb-1), pDb=&db->aDb[i]; i>=0; i--, pDb--){
if( (!OMIT_TEMPDB || i!=1 ) && n==sqlite3Strlen30(pDb->zName) &&
0==sqlite3StrICmp(pDb->zName, zName) ){
break;
}
}
- sqlite3DbFree(db, zName);
}
return i;
}
+/*
+** The token *pName contains the name of a database (either "main" or
+** "temp" or the name of an attached db). This routine returns the
+** index of the named database in db->aDb[], or -1 if the named db
+** does not exist.
+*/
+SQLITE_PRIVATE int sqlite3FindDb(sqlite3 *db, Token *pName){
+ int i; /* Database number */
+ char *zName; /* Name we are searching for */
+ zName = sqlite3NameFromToken(db, pName);
+ i = sqlite3FindDbName(db, zName);
+ sqlite3DbFree(db, zName);
+ return i;
+}
+
/* The table or view or trigger name is passed to this routine via tokens
** pName1 and pName2. If the table name was fully qualified, for example:
**
int i, j, needQuote;
i = *pIdx;
for(j=0; zIdent[j]; j++){
- if( !isalnum(zIdent[j]) && zIdent[j]!='_' ) break;
+ if( !sqlite3Isalnum(zIdent[j]) && zIdent[j]!='_' ) break;
}
- needQuote = zIdent[j]!=0 || isdigit(zIdent[0])
+ needQuote = zIdent[j]!=0 || sqlite3Isdigit(zIdent[0])
|| sqlite3KeywordCode(zIdent, j)!=TK_ID;
if( needQuote ) z[i++] = '"';
for(j=0; zIdent[j]; j++){
** table. Memory to hold the text of the statement is obtained
** from sqliteMalloc() and must be freed by the calling function.
*/
-static char *createTableStmt(sqlite3 *db, Table *p, int isTemp){
+static char *createTableStmt(sqlite3 *db, Table *p){
int i, k, n;
char *zStmt;
char *zSep, *zSep2, *zEnd, *z;
db->mallocFailed = 1;
return 0;
}
- sqlite3_snprintf(n, zStmt,
- !OMIT_TEMPDB&&isTemp ? "CREATE TEMP TABLE ":"CREATE TABLE ");
+ sqlite3_snprintf(n, zStmt, "CREATE TABLE ");
k = sqlite3Strlen30(zStmt);
identPut(zStmt, &k, p->zName);
zStmt[k++] = '(';
/* Compute the complete text of the CREATE statement */
if( pSelect ){
- zStmt = createTableStmt(db, p, p->pSchema==db->aDb[1].pSchema);
+ zStmt = createTableStmt(db, p);
}else{
n = (int)(pEnd->z - pParse->sNameToken.z) + 1;
zStmt = sqlite3MPrintf(db,
sEnd.n = 0;
n = (int)(sEnd.z - pBegin->z);
z = (const unsigned char*)pBegin->z;
- while( n>0 && (z[n-1]==';' || isspace(z[n-1])) ){ n--; }
+ while( n>0 && (z[n-1]==';' || sqlite3Isspace(z[n-1])) ){ n--; }
sEnd.z = &z[n-1];
sEnd.n = 1;
pDb = &db->aDb[iDb];
if( pTab==0 || pParse->nErr ) goto exit_create_index;
- if( sqlite3StrNICmp(pTab->zName, "sqlite_", 7)==0 ){
+ if( sqlite3StrNICmp(pTab->zName, "sqlite_", 7)==0
+ && memcmp(&pTab->zName[7],"altertab_",9)!=0 ){
sqlite3ErrorMsg(pParse, "table %s may not be indexed", pTab->zName);
goto exit_create_index;
}
** rollback the whole transaction. For operations where all constraints
** can be checked before any changes are made to the database, it is never
** necessary to undo a write and the checkpoint should not be set.
-**
-** Only database iDb and the temp database are made writable by this call.
-** If iDb==0, then the main and temp databases are made writable. If
-** iDb==1 then only the temp database is made writable. If iDb>1 then the
-** specified auxiliary database and the temp database are made writable.
*/
SQLITE_PRIVATE void sqlite3BeginWriteOperation(Parse *pParse, int setStatement, int iDb){
Vdbe *v = sqlite3GetVdbe(pParse);
if( setStatement && pParse->nested==0 ){
sqlite3VdbeAddOp1(v, OP_Statement, iDb);
}
- if( (OMIT_TEMPDB || iDb!=1) && pParse->db->aDb[1].pBt!=0 ){
- sqlite3BeginWriteOperation(pParse, setStatement, 1);
- }
}
/*
** that uses encoding enc. The value returned indicates how well the
** request is matched. A higher value indicates a better match.
**
-** The returned value is always between 1 and 6, as follows:
+** The returned value is always between 0 and 6, as follows:
**
+** 0: Not a match, or if nArg<0 and the function is has no implementation.
** 1: A variable arguments function that prefers UTF-8 when a UTF-16
** encoding is requested, or vice versa.
** 2: A variable arguments function that uses UTF-16BE when UTF-16LE is
*/
static int matchQuality(FuncDef *p, int nArg, u8 enc){
int match = 0;
- if( p->nArg==-1 || p->nArg==nArg || nArg==-1 ){
+ if( p->nArg==-1 || p->nArg==nArg
+ || (nArg==-1 && (p->xFunc!=0 || p->xStep!=0))
+ ){
match = 1;
if( p->nArg==nArg || nArg==-1 ){
match = 4;
int iBest;
CollSeq *pColl;
- if( argc==0 ) return;
+ assert( argc>1 );
mask = sqlite3_user_data(context)==0 ? 0 : -1;
pColl = sqlite3GetFuncCollSeq(context);
assert( pColl );
for(i=1; i<argc; i++){
if( sqlite3_value_type(argv[i])==SQLITE_NULL ) return;
if( (sqlite3MemCompare(argv[iBest], argv[i], pColl)^mask)>=0 ){
+ testcase( mask==0 );
iBest = i;
}
}
const char *z = 0;
UNUSED_PARAMETER(NotUsed);
switch( sqlite3_value_type(argv[0]) ){
- case SQLITE_NULL: z = "null"; break;
case SQLITE_INTEGER: z = "integer"; break;
case SQLITE_TEXT: z = "text"; break;
case SQLITE_FLOAT: z = "real"; break;
case SQLITE_BLOB: z = "blob"; break;
+ default: z = "null"; break;
}
sqlite3_result_text(context, z, -1, SQLITE_STATIC);
}
int len;
int p0type;
i64 p1, p2;
+ int negP2 = 0;
assert( argc==3 || argc==2 );
+ if( sqlite3_value_type(argv[1])==SQLITE_NULL
+ || (argc==3 && sqlite3_value_type(argv[2])==SQLITE_NULL)
+ ){
+ return;
+ }
p0type = sqlite3_value_type(argv[0]);
if( p0type==SQLITE_BLOB ){
len = sqlite3_value_bytes(argv[0]);
p1 = sqlite3_value_int(argv[1]);
if( argc==3 ){
p2 = sqlite3_value_int(argv[2]);
+ if( p2<0 ){
+ p2 = -p2;
+ negP2 = 1;
+ }
}else{
p2 = sqlite3_context_db_handle(context)->aLimit[SQLITE_LIMIT_LENGTH];
}
p1 += len;
if( p1<0 ){
p2 += p1;
+ if( p2<0 ) p2 = 0;
p1 = 0;
}
}else if( p1>0 ){
p1--;
+ }else if( p2>0 ){
+ p2--;
}
+ if( negP2 ){
+ p1 -= p2;
+ if( p1<0 ){
+ p2 += p1;
+ p1 = 0;
+ }
+ }
+ assert( p1>=0 && p2>=0 );
if( p1+p2>len ){
p2 = len-p1;
+ if( p2<0 ) p2 = 0;
}
if( p0type!=SQLITE_BLOB ){
while( *z && p1 ){
}
sqlite3_result_text(context, (char*)z, (int)(z2-z), SQLITE_TRANSIENT);
}else{
- if( p2<0 ) p2 = 0;
sqlite3_result_blob(context, (char*)&z[p1], (int)p2, SQLITE_TRANSIENT);
}
}
/*
** Implementation of the round() function
*/
+#ifndef SQLITE_OMIT_FLOATING_POINT
static void roundFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
int n = 0;
double r;
sqlite3AtoF(zBuf, &r);
sqlite3_result_double(context, r);
}
+#endif
/*
** Allocate nByte bytes of space using sqlite3_malloc(). If the
char *z1;
const char *z2;
int i, n;
- if( argc<1 || SQLITE_NULL==sqlite3_value_type(argv[0]) ) return;
+ UNUSED_PARAMETER(argc);
z2 = (char*)sqlite3_value_text(argv[0]);
n = sqlite3_value_bytes(argv[0]);
/* Verify that the call to _bytes() does not invalidate the _text() pointer */
if( z1 ){
memcpy(z1, z2, n+1);
for(i=0; z1[i]; i++){
- z1[i] = (char)toupper(z1[i]);
+ z1[i] = (char)sqlite3Toupper(z1[i]);
}
sqlite3_result_text(context, z1, -1, sqlite3_free);
}
}
}
static void lowerFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
- char *z1;
+ u8 *z1;
const char *z2;
int i, n;
- if( argc<1 || SQLITE_NULL==sqlite3_value_type(argv[0]) ) return;
+ UNUSED_PARAMETER(argc);
z2 = (char*)sqlite3_value_text(argv[0]);
n = sqlite3_value_bytes(argv[0]);
/* Verify that the call to _bytes() does not invalidate the _text() pointer */
if( z1 ){
memcpy(z1, z2, n+1);
for(i=0; z1[i]; i++){
- z1[i] = (char)tolower(z1[i]);
+ z1[i] = sqlite3Tolower(z1[i]);
}
- sqlite3_result_text(context, z1, -1, sqlite3_free);
+ sqlite3_result_text(context, (char *)z1, -1, sqlite3_free);
}
}
}
** single-quote escapes.
*/
static void quoteFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
- if( argc<1 ) return;
+ assert( argc==1 );
+ UNUSED_PARAMETER(argc);
switch( sqlite3_value_type(argv[0]) ){
- case SQLITE_NULL: {
- sqlite3_result_text(context, "NULL", 4, SQLITE_STATIC);
- break;
- }
case SQLITE_INTEGER:
case SQLITE_FLOAT: {
sqlite3_result_value(context, argv[0]);
z[j] = 0;
sqlite3_result_text(context, z, j, sqlite3_free);
}
+ break;
+ }
+ default: {
+ assert( sqlite3_value_type(argv[0])==SQLITE_NULL );
+ sqlite3_result_text(context, "NULL", 4, SQLITE_STATIC);
+ break;
}
}
}
nStr = sqlite3_value_bytes(argv[0]);
assert( zStr==sqlite3_value_text(argv[0]) ); /* No encoding change */
zPattern = sqlite3_value_text(argv[1]);
- if( zPattern==0 || zPattern[0]==0 ) return;
+ if( zPattern==0 ){
+ assert( sqlite3_value_type(argv[1])==SQLITE_NULL
+ || sqlite3_context_db_handle(context)->mallocFailed );
+ return;
+ }
+ if( zPattern[0]==0 ){
+ assert( sqlite3_value_type(argv[1])!=SQLITE_NULL );
+ sqlite3_result_value(context, argv[0]);
+ return;
+ }
nPattern = sqlite3_value_bytes(argv[1]);
assert( zPattern==sqlite3_value_text(argv[1]) ); /* No encoding change */
zRep = sqlite3_value_text(argv[2]);
assert( argc==1 );
zIn = (u8*)sqlite3_value_text(argv[0]);
if( zIn==0 ) zIn = (u8*)"";
- for(i=0; zIn[i] && !isalpha(zIn[i]); i++){}
+ for(i=0; zIn[i] && !sqlite3Isalpha(zIn[i]); i++){}
if( zIn[i] ){
u8 prevcode = iCode[zIn[i]&0x7f];
- zResult[0] = toupper(zIn[i]);
+ zResult[0] = sqlite3Toupper(zIn[i]);
for(j=1; j<4 && zIn[i]; i++){
int code = iCode[zIn[i]&0x7f];
if( code>0 ){
static void totalFinalize(sqlite3_context *context){
SumCtx *p;
p = sqlite3_aggregate_context(context, 0);
- sqlite3_result_double(context, p ? p->rSum : 0.0);
+ /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
+ sqlite3_result_double(context, p ? p->rSum : (double)0);
}
/*
const char *zVal;
StrAccum *pAccum;
const char *zSep;
- int nVal, nSep, i;
- if( argc==0 || sqlite3_value_type(argv[0])==SQLITE_NULL ) return;
+ int nVal, nSep;
+ assert( argc==1 || argc==2 );
+ if( sqlite3_value_type(argv[0])==SQLITE_NULL ) return;
pAccum = (StrAccum*)sqlite3_aggregate_context(context, sizeof(*pAccum));
if( pAccum ){
pAccum->useMalloc = 1;
pAccum->mxAlloc = db->aLimit[SQLITE_LIMIT_LENGTH];
if( pAccum->nChar ){
- if( argc>1 ){
- zSep = (char*)sqlite3_value_text(argv[argc-1]);
- nSep = sqlite3_value_bytes(argv[argc-1]);
+ if( argc==2 ){
+ zSep = (char*)sqlite3_value_text(argv[1]);
+ nSep = sqlite3_value_bytes(argv[1]);
}else{
zSep = ",";
nSep = 1;
}
sqlite3StrAccumAppend(pAccum, zSep, nSep);
}
- i = 0;
- do{
- zVal = (char*)sqlite3_value_text(argv[i]);
- nVal = sqlite3_value_bytes(argv[i]);
- sqlite3StrAccumAppend(pAccum, zVal, nVal);
- i++;
- }while( i<argc-1 );
+ zVal = (char*)sqlite3_value_text(argv[0]);
+ nVal = sqlite3_value_bytes(argv[0]);
+ sqlite3StrAccumAppend(pAccum, zVal, nVal);
}
}
static void groupConcatFinalize(sqlite3_context *context){
FUNCTION(substr, 2, 0, 0, substrFunc ),
FUNCTION(substr, 3, 0, 0, substrFunc ),
FUNCTION(abs, 1, 0, 0, absFunc ),
+#ifndef SQLITE_OMIT_FLOATING_POINT
FUNCTION(round, 1, 0, 0, roundFunc ),
FUNCTION(round, 2, 0, 0, roundFunc ),
+#endif
FUNCTION(upper, 1, 0, 0, upperFunc ),
FUNCTION(lower, 1, 0, 0, lowerFunc ),
FUNCTION(coalesce, 1, 0, 0, 0 ),
FUNCTION(coalesce, 0, 0, 0, 0 ),
FUNCTION(hex, 1, 0, 0, hexFunc ),
FUNCTION(ifnull, 2, 0, 1, ifnullFunc ),
- FUNCTION(random, -1, 0, 0, randomFunc ),
+ FUNCTION(random, 0, 0, 0, randomFunc ),
FUNCTION(randomblob, 1, 0, 0, randomBlob ),
FUNCTION(nullif, 2, 0, 1, nullifFunc ),
FUNCTION(sqlite_version, 0, 0, 0, versionFunc ),
AGGREGATE(avg, 1, 0, 0, sumStep, avgFinalize ),
AGGREGATE(count, 0, 0, 0, countStep, countFinalize ),
AGGREGATE(count, 1, 0, 0, countStep, countFinalize ),
- AGGREGATE(group_concat, -1, 0, 0, groupConcatStep, groupConcatFinalize),
+ AGGREGATE(group_concat, 1, 0, 0, groupConcatStep, groupConcatFinalize),
+ AGGREGATE(group_concat, 2, 0, 0, groupConcatStep, groupConcatFinalize),
LIKEFUNC(glob, 2, &globInfo, SQLITE_FUNC_LIKE|SQLITE_FUNC_CASE),
#ifdef SQLITE_CASE_SENSITIVE_LIKE
if( rc!=SQLITE_SCHEMA ){
nRetry = 0;
zSql = zLeftover;
- while( isspace((unsigned char)zSql[0]) ) zSql++;
+ while( sqlite3Isspace(zSql[0]) ) zSql++;
}
break;
}
static const u8 iLength[] = {2, 2, 3, 5, 3, 4, 4};
static const u8 iValue[] = {1, 0, 0, 0, 1, 1, 2};
int i, n;
- if( isdigit(*z) ){
+ if( sqlite3Isdigit(*z) ){
return (u8)atoi(z);
}
n = sqlite3Strlen30(z);
if( pFunc->iDistinct>=0 ){
Expr *pE = pFunc->pExpr;
if( pE->pList==0 || pE->pList->nExpr!=1 ){
- sqlite3ErrorMsg(pParse, "DISTINCT in aggregate must be followed "
- "by an expression");
+ sqlite3ErrorMsg(pParse, "DISTINCT aggregates must have exactly one "
+ "argument");
pFunc->iDistinct = -1;
}else{
KeyInfo *pKeyInfo = keyInfoFromExprList(pParse, pE->pList);
*pazResult = 0;
if( pnColumn ) *pnColumn = 0;
if( pnRow ) *pnRow = 0;
+ if( pzErrMsg ) *pzErrMsg = 0;
res.zErrMsg = 0;
res.nResult = 0;
res.nRow = 0;
int isMemDb; /* True is vacuuming a :memory: database */
int nRes;
+ if( !db->autoCommit ){
+ sqlite3SetString(pzErrMsg, db, "cannot VACUUM from within a transaction");
+ return SQLITE_ERROR;
+ }
+
/* Save the current value of the write-schema flag before setting it. */
saved_flags = db->flags;
saved_nChange = db->nChange;
saved_nTotalChange = db->nTotalChange;
db->flags |= SQLITE_WriteSchema | SQLITE_IgnoreChecks;
- if( !db->autoCommit ){
- sqlite3SetString(pzErrMsg, db, "cannot VACUUM from within a transaction");
- rc = SQLITE_ERROR;
- goto end_of_vacuum;
- }
pMain = db->aDb[0].pBt;
pMainPager = sqlite3BtreePager(pMain);
isMemDb = sqlite3PagerFile(pMainPager)->pMethods==0;
#ifndef SQLITE_OMIT_AUTOVACUUM
sqlite3BtreeSetAutoVacuum(pMain, sqlite3BtreeGetAutoVacuum(pTemp));
#endif
- rc = sqlite3BtreeCommit(pMain);
}
if( rc==SQLITE_OK ){
if( chngToIN ){
int okToChngToIN = 0; /* True if the conversion to IN is valid */
int iColumn = -1; /* Column index on lhs of IN operator */
- int iCursor; /* Table cursor common to all terms */
+ int iCursor = -1; /* Table cursor common to all terms */
int j = 0; /* Loop counter */
/* Search for a table and column that appears on one side or the
+ sizeof(*pIdxOrderBy)*nOrderBy );
if( pIdxInfo==0 ){
sqlite3ErrorMsg(pParse, "out of memory");
- return 0.0;
+ /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
+ return (double)0;
}
*ppIdxInfo = pIdxInfo;
pIdxInfo->idxNum = 0;
pIdxInfo->needToFreeIdxStr = 0;
pIdxInfo->orderByConsumed = 0;
- pIdxInfo->estimatedCost = SQLITE_BIG_DBL / 2.0;
+ /* ((double)2) In case of SQLITE_OMIT_FLOATING_POINT... */
+ pIdxInfo->estimatedCost = SQLITE_BIG_DBL / ((double)2);
nOrderBy = pIdxInfo->nOrderBy;
if( pIdxInfo->nOrderBy && !orderByUsable ){
*(int*)&pIdxInfo->nOrderBy = 0;
if( !pIdxInfo->aConstraint[i].usable && pUsage[i].argvIndex>0 ){
sqlite3ErrorMsg(pParse,
"table %s: xBestIndex returned an invalid plan", pTab->zName);
- return 0.0;
+ /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
+ return (double)0;
}
}
wsFlags |= WHERE_COLUMN_IN;
if( pExpr->pSelect!=0 ){
inMultiplier *= 25;
- }else if( ALWAYS(pExpr->pList) ){
+ }else if( pExpr->pList ){
inMultiplier *= pExpr->pList->nExpr + 1;
}
}
sCost.plan.wsFlags = WHERE_VIRTUALTABLE | WHERE_ORDERBY;
}
sCost.plan.nEq = 0;
- if( (SQLITE_BIG_DBL/2.0)<sCost.rCost ){
+ /* (double)2 In case of SQLITE_OMIT_FLOATING_POINT... */
+ if( (SQLITE_BIG_DBL/((double)2))<sCost.rCost ){
/* The cost is not allowed to be larger than SQLITE_BIG_DBL (the
** inital value of lowestCost in this loop. If it is, then
** the (cost<lowestCost) test below will never be true.
*/
- sCost.rCost = (SQLITE_BIG_DBL/2.0);
+ /* (double)2 In case of SQLITE_OMIT_FLOATING_POINT... */
+ sCost.rCost = (SQLITE_BIG_DBL/((double)2));
}
}else
#endif
pLevel->iIdxCur = -1;
}
notReady &= ~getMask(pMaskSet, pTabList->a[bestJ].iCursor);
- pLevel->iFrom = bestJ;
+ pLevel->iFrom = (u8)bestJ;
/* Check that if the table scanned by this loop iteration had an
** INDEXED BY clause attached to it, that the named index is being
#define YYCODETYPE unsigned char
#define YYNOCODE 251
#define YYACTIONTYPE unsigned short int
-#define YYWILDCARD 62
+#define YYWILDCARD 64
#define sqlite3ParserTOKENTYPE Token
typedef union {
int yyinit;
** yy_default[] Default action for each state.
*/
static const YYACTIONTYPE yy_action[] = {
- /* 0 */ 304, 930, 120, 609, 1, 178, 214, 436, 62, 62,
- /* 10 */ 62, 62, 216, 64, 64, 64, 64, 65, 65, 66,
- /* 20 */ 66, 66, 67, 216, 406, 403, 443, 449, 69, 64,
- /* 30 */ 64, 64, 64, 65, 65, 66, 66, 66, 67, 216,
- /* 40 */ 469, 467, 336, 174, 61, 60, 309, 453, 454, 450,
- /* 50 */ 450, 63, 63, 62, 62, 62, 62, 200, 64, 64,
- /* 60 */ 64, 64, 65, 65, 66, 66, 66, 67, 216, 304,
- /* 70 */ 510, 312, 436, 509, 438, 83, 64, 64, 64, 64,
- /* 80 */ 65, 65, 66, 66, 66, 67, 216, 65, 65, 66,
- /* 90 */ 66, 66, 67, 216, 511, 443, 449, 325, 408, 59,
- /* 100 */ 465, 218, 57, 213, 411, 496, 428, 440, 440, 440,
- /* 110 */ 206, 67, 216, 61, 60, 309, 453, 454, 450, 450,
- /* 120 */ 63, 63, 62, 62, 62, 62, 552, 64, 64, 64,
- /* 130 */ 64, 65, 65, 66, 66, 66, 67, 216, 304, 228,
- /* 140 */ 186, 469, 544, 312, 433, 170, 114, 256, 357, 261,
- /* 150 */ 358, 181, 425, 20, 426, 542, 153, 85, 265, 465,
- /* 160 */ 218, 150, 151, 539, 443, 449, 95, 311, 394, 412,
- /* 170 */ 413, 510, 276, 427, 436, 438, 152, 553, 545, 589,
- /* 180 */ 590, 539, 61, 60, 309, 453, 454, 450, 450, 63,
- /* 190 */ 63, 62, 62, 62, 62, 402, 64, 64, 64, 64,
- /* 200 */ 65, 65, 66, 66, 66, 67, 216, 304, 440, 440,
- /* 210 */ 440, 228, 109, 411, 399, 523, 593, 330, 114, 256,
- /* 220 */ 357, 261, 358, 181, 187, 330, 485, 359, 362, 363,
- /* 230 */ 265, 593, 241, 443, 449, 592, 591, 248, 364, 436,
- /* 240 */ 432, 35, 492, 66, 66, 66, 67, 216, 432, 42,
- /* 250 */ 592, 61, 60, 309, 453, 454, 450, 450, 63, 63,
- /* 260 */ 62, 62, 62, 62, 401, 64, 64, 64, 64, 65,
- /* 270 */ 65, 66, 66, 66, 67, 216, 304, 570, 412, 413,
- /* 280 */ 187, 501, 344, 359, 362, 363, 215, 354, 346, 221,
- /* 290 */ 330, 341, 330, 56, 364, 569, 588, 217, 68, 156,
- /* 300 */ 70, 155, 443, 449, 68, 187, 70, 155, 359, 362,
- /* 310 */ 363, 397, 217, 432, 35, 432, 36, 148, 569, 364,
- /* 320 */ 61, 60, 309, 453, 454, 450, 450, 63, 63, 62,
- /* 330 */ 62, 62, 62, 433, 64, 64, 64, 64, 65, 65,
- /* 340 */ 66, 66, 66, 67, 216, 387, 282, 281, 330, 304,
- /* 350 */ 474, 68, 480, 70, 155, 344, 214, 154, 299, 330,
- /* 360 */ 343, 467, 543, 174, 384, 475, 257, 247, 387, 282,
- /* 370 */ 281, 432, 28, 411, 160, 443, 449, 258, 476, 214,
- /* 380 */ 516, 496, 432, 42, 198, 492, 68, 162, 70, 155,
- /* 390 */ 517, 433, 78, 61, 60, 309, 453, 454, 450, 450,
- /* 400 */ 63, 63, 62, 62, 62, 62, 595, 64, 64, 64,
- /* 410 */ 64, 65, 65, 66, 66, 66, 67, 216, 433, 367,
- /* 420 */ 349, 433, 304, 220, 222, 544, 505, 330, 465, 330,
- /* 430 */ 230, 330, 240, 163, 161, 554, 20, 431, 412, 413,
- /* 440 */ 2, 430, 385, 375, 411, 198, 182, 249, 443, 449,
- /* 450 */ 432, 35, 432, 50, 432, 50, 310, 460, 461, 17,
- /* 460 */ 207, 335, 460, 461, 388, 81, 61, 60, 309, 453,
- /* 470 */ 454, 450, 450, 63, 63, 62, 62, 62, 62, 433,
- /* 480 */ 64, 64, 64, 64, 65, 65, 66, 66, 66, 67,
- /* 490 */ 216, 304, 348, 504, 433, 508, 531, 486, 320, 353,
- /* 500 */ 321, 306, 457, 385, 23, 331, 265, 470, 411, 412,
- /* 510 */ 413, 444, 445, 551, 526, 307, 532, 443, 449, 217,
- /* 520 */ 550, 496, 432, 3, 217, 381, 607, 921, 333, 921,
- /* 530 */ 456, 456, 447, 448, 276, 61, 60, 309, 453, 454,
- /* 540 */ 450, 450, 63, 63, 62, 62, 62, 62, 410, 64,
- /* 550 */ 64, 64, 64, 65, 65, 66, 66, 66, 67, 216,
- /* 560 */ 304, 446, 607, 920, 525, 920, 604, 264, 314, 474,
- /* 570 */ 411, 123, 411, 412, 413, 124, 277, 487, 234, 333,
- /* 580 */ 411, 456, 456, 319, 475, 411, 443, 449, 333, 377,
- /* 590 */ 456, 456, 286, 333, 380, 456, 456, 476, 178, 340,
- /* 600 */ 436, 420, 604, 315, 61, 60, 309, 453, 454, 450,
- /* 610 */ 450, 63, 63, 62, 62, 62, 62, 330, 64, 64,
- /* 620 */ 64, 64, 65, 65, 66, 66, 66, 67, 216, 304,
- /* 630 */ 289, 5, 287, 268, 466, 412, 413, 412, 413, 396,
- /* 640 */ 432, 29, 503, 330, 159, 412, 413, 610, 406, 403,
- /* 650 */ 412, 413, 414, 415, 416, 443, 449, 333, 214, 456,
- /* 660 */ 456, 488, 276, 489, 21, 436, 432, 24, 436, 487,
- /* 670 */ 514, 515, 395, 61, 60, 309, 453, 454, 450, 450,
- /* 680 */ 63, 63, 62, 62, 62, 62, 330, 64, 64, 64,
- /* 690 */ 64, 65, 65, 66, 66, 66, 67, 216, 304, 560,
- /* 700 */ 374, 560, 352, 94, 578, 330, 567, 515, 330, 432,
- /* 710 */ 33, 330, 288, 330, 562, 330, 544, 330, 561, 183,
- /* 720 */ 184, 185, 603, 303, 443, 449, 600, 20, 432, 54,
- /* 730 */ 376, 432, 53, 436, 432, 99, 432, 97, 432, 102,
- /* 740 */ 432, 103, 61, 60, 309, 453, 454, 450, 450, 63,
- /* 750 */ 63, 62, 62, 62, 62, 330, 64, 64, 64, 64,
- /* 760 */ 65, 65, 66, 66, 66, 67, 216, 304, 330, 405,
- /* 770 */ 1, 202, 330, 512, 330, 214, 330, 171, 432, 108,
- /* 780 */ 330, 421, 429, 330, 487, 342, 330, 384, 19, 386,
- /* 790 */ 145, 432, 110, 443, 449, 432, 16, 432, 100, 432,
- /* 800 */ 34, 351, 270, 432, 98, 433, 432, 25, 276, 432,
- /* 810 */ 55, 61, 60, 309, 453, 454, 450, 450, 63, 63,
- /* 820 */ 62, 62, 62, 62, 330, 64, 64, 64, 64, 65,
- /* 830 */ 65, 66, 66, 66, 67, 216, 304, 330, 323, 119,
- /* 840 */ 274, 330, 272, 330, 355, 330, 422, 432, 111, 330,
- /* 850 */ 580, 159, 115, 233, 330, 177, 161, 439, 463, 463,
- /* 860 */ 432, 112, 443, 449, 432, 113, 432, 26, 432, 37,
- /* 870 */ 649, 431, 432, 38, 492, 430, 487, 432, 27, 264,
- /* 880 */ 61, 71, 309, 453, 454, 450, 450, 63, 63, 62,
- /* 890 */ 62, 62, 62, 330, 64, 64, 64, 64, 65, 65,
- /* 900 */ 66, 66, 66, 67, 216, 304, 330, 264, 264, 528,
- /* 910 */ 330, 157, 330, 252, 330, 229, 432, 39, 330, 482,
- /* 920 */ 332, 478, 77, 330, 79, 330, 483, 520, 521, 432,
- /* 930 */ 40, 443, 449, 432, 41, 432, 43, 432, 44, 492,
- /* 940 */ 491, 432, 45, 316, 317, 433, 432, 30, 432, 31,
- /* 950 */ 60, 309, 453, 454, 450, 450, 63, 63, 62, 62,
- /* 960 */ 62, 62, 330, 64, 64, 64, 64, 65, 65, 66,
- /* 970 */ 66, 66, 67, 216, 304, 330, 264, 564, 254, 330,
- /* 980 */ 458, 330, 22, 330, 495, 432, 46, 330, 494, 535,
- /* 990 */ 179, 186, 330, 267, 330, 186, 451, 497, 432, 47,
- /* 1000 */ 443, 449, 432, 48, 432, 49, 432, 32, 182, 262,
- /* 1010 */ 432, 10, 318, 276, 389, 432, 51, 432, 52, 276,
- /* 1020 */ 309, 453, 454, 450, 450, 63, 63, 62, 62, 62,
- /* 1030 */ 62, 276, 64, 64, 64, 64, 65, 65, 66, 66,
- /* 1040 */ 66, 67, 216, 165, 276, 276, 189, 192, 235, 236,
- /* 1050 */ 237, 168, 239, 566, 105, 581, 18, 530, 529, 73,
- /* 1060 */ 337, 582, 4, 306, 605, 527, 308, 211, 366, 294,
- /* 1070 */ 186, 263, 533, 231, 334, 565, 295, 186, 534, 546,
- /* 1080 */ 433, 433, 573, 574, 179, 92, 232, 292, 209, 269,
- /* 1090 */ 569, 339, 271, 853, 208, 273, 275, 210, 585, 195,
- /* 1100 */ 92, 469, 371, 606, 602, 8, 302, 423, 280, 379,
- /* 1110 */ 382, 383, 147, 242, 283, 437, 462, 284, 285, 577,
- /* 1120 */ 338, 76, 75, 587, 293, 296, 297, 599, 481, 464,
- /* 1130 */ 74, 328, 329, 250, 526, 438, 572, 166, 290, 393,
- /* 1140 */ 392, 291, 281, 409, 537, 584, 305, 484, 259, 540,
- /* 1150 */ 417, 214, 418, 214, 536, 326, 538, 419, 361, 167,
- /* 1160 */ 73, 337, 169, 4, 7, 327, 347, 308, 440, 440,
- /* 1170 */ 440, 441, 442, 11, 85, 334, 398, 84, 434, 345,
- /* 1180 */ 243, 58, 244, 73, 337, 80, 4, 245, 435, 246,
- /* 1190 */ 308, 176, 339, 479, 86, 121, 356, 350, 334, 493,
- /* 1200 */ 251, 253, 469, 499, 255, 513, 500, 518, 313, 519,
- /* 1210 */ 260, 523, 125, 522, 226, 339, 219, 524, 368, 190,
- /* 1220 */ 191, 300, 76, 75, 502, 469, 225, 227, 547, 541,
- /* 1230 */ 548, 74, 328, 329, 301, 555, 438, 549, 370, 193,
- /* 1240 */ 372, 194, 557, 89, 196, 76, 75, 278, 378, 117,
- /* 1250 */ 558, 568, 133, 390, 74, 328, 329, 199, 391, 438,
- /* 1260 */ 322, 134, 135, 136, 575, 143, 583, 596, 139, 440,
- /* 1270 */ 440, 440, 441, 442, 11, 597, 598, 601, 137, 142,
- /* 1280 */ 101, 224, 104, 407, 238, 424, 650, 651, 93, 172,
- /* 1290 */ 96, 173, 440, 440, 440, 441, 442, 11, 452, 455,
- /* 1300 */ 72, 471, 459, 468, 472, 144, 158, 6, 473, 490,
- /* 1310 */ 107, 175, 477, 82, 13, 122, 12, 180, 506, 118,
- /* 1320 */ 498, 164, 507, 324, 223, 87, 126, 116, 266, 127,
- /* 1330 */ 88, 128, 188, 258, 360, 369, 146, 556, 129, 373,
- /* 1340 */ 179, 365, 279, 197, 131, 130, 563, 9, 571, 132,
- /* 1350 */ 559, 201, 14, 576, 203, 204, 205, 579, 140, 138,
- /* 1360 */ 141, 15, 586, 594, 212, 106, 400, 298, 149, 404,
- /* 1370 */ 931, 608, 90, 91,
+ /* 0 */ 304, 930, 120, 609, 1, 178, 264, 436, 62, 62,
+ /* 10 */ 62, 62, 214, 64, 64, 64, 64, 65, 65, 66,
+ /* 20 */ 66, 66, 67, 216, 593, 467, 336, 174, 443, 449,
+ /* 30 */ 69, 64, 64, 64, 64, 65, 65, 66, 66, 66,
+ /* 40 */ 67, 216, 315, 592, 591, 355, 61, 60, 309, 453,
+ /* 50 */ 454, 450, 450, 63, 63, 62, 62, 62, 62, 216,
+ /* 60 */ 64, 64, 64, 64, 65, 65, 66, 66, 66, 67,
+ /* 70 */ 216, 304, 431, 312, 436, 509, 430, 83, 64, 64,
+ /* 80 */ 64, 64, 65, 65, 66, 66, 66, 67, 216, 406,
+ /* 90 */ 403, 411, 65, 65, 66, 66, 66, 67, 216, 443,
+ /* 100 */ 449, 551, 526, 59, 588, 217, 171, 57, 550, 411,
+ /* 110 */ 68, 428, 70, 155, 610, 406, 403, 61, 60, 309,
+ /* 120 */ 453, 454, 450, 450, 63, 63, 62, 62, 62, 62,
+ /* 130 */ 595, 64, 64, 64, 64, 65, 65, 66, 66, 66,
+ /* 140 */ 67, 216, 304, 228, 414, 415, 416, 312, 469, 170,
+ /* 150 */ 114, 256, 357, 261, 358, 181, 330, 562, 412, 413,
+ /* 160 */ 187, 561, 265, 359, 362, 363, 465, 218, 150, 151,
+ /* 170 */ 443, 449, 95, 153, 364, 376, 412, 413, 510, 432,
+ /* 180 */ 36, 492, 438, 411, 465, 218, 589, 590, 61, 60,
+ /* 190 */ 309, 453, 454, 450, 450, 63, 63, 62, 62, 62,
+ /* 200 */ 62, 649, 64, 64, 64, 64, 65, 65, 66, 66,
+ /* 210 */ 66, 67, 216, 304, 440, 440, 440, 228, 109, 264,
+ /* 220 */ 501, 330, 469, 511, 114, 256, 357, 261, 358, 181,
+ /* 230 */ 330, 247, 68, 480, 70, 155, 265, 68, 552, 70,
+ /* 240 */ 155, 443, 449, 187, 432, 35, 359, 362, 363, 569,
+ /* 250 */ 412, 413, 510, 432, 42, 229, 438, 364, 207, 61,
+ /* 260 */ 60, 309, 453, 454, 450, 450, 63, 63, 62, 62,
+ /* 270 */ 62, 62, 264, 64, 64, 64, 64, 65, 65, 66,
+ /* 280 */ 66, 66, 67, 216, 304, 570, 344, 427, 440, 440,
+ /* 290 */ 440, 354, 433, 346, 221, 539, 325, 408, 411, 387,
+ /* 300 */ 282, 281, 213, 66, 66, 66, 67, 216, 316, 206,
+ /* 310 */ 214, 187, 443, 449, 359, 362, 363, 299, 545, 2,
+ /* 320 */ 467, 543, 174, 411, 68, 364, 70, 155, 569, 384,
+ /* 330 */ 61, 60, 309, 453, 454, 450, 450, 63, 63, 62,
+ /* 340 */ 62, 62, 62, 433, 64, 64, 64, 64, 65, 65,
+ /* 350 */ 66, 66, 66, 67, 216, 465, 304, 68, 544, 70,
+ /* 360 */ 155, 426, 542, 593, 330, 412, 413, 394, 425, 20,
+ /* 370 */ 539, 436, 178, 330, 436, 330, 514, 515, 387, 282,
+ /* 380 */ 281, 198, 592, 241, 443, 449, 248, 432, 50, 214,
+ /* 390 */ 412, 413, 152, 553, 402, 230, 432, 42, 432, 35,
+ /* 400 */ 162, 78, 61, 60, 309, 453, 454, 450, 450, 63,
+ /* 410 */ 63, 62, 62, 62, 62, 433, 64, 64, 64, 64,
+ /* 420 */ 65, 65, 66, 66, 66, 67, 216, 330, 304, 198,
+ /* 430 */ 474, 330, 505, 320, 433, 367, 154, 220, 436, 385,
+ /* 440 */ 348, 436, 544, 397, 217, 475, 163, 161, 411, 240,
+ /* 450 */ 432, 28, 554, 20, 432, 50, 443, 449, 307, 341,
+ /* 460 */ 476, 381, 516, 433, 182, 485, 310, 460, 461, 19,
+ /* 470 */ 433, 145, 517, 81, 61, 60, 309, 453, 454, 450,
+ /* 480 */ 450, 63, 63, 62, 62, 62, 62, 385, 64, 64,
+ /* 490 */ 64, 64, 65, 65, 66, 66, 66, 67, 216, 304,
+ /* 500 */ 321, 504, 353, 508, 17, 457, 77, 330, 79, 388,
+ /* 510 */ 335, 460, 461, 470, 512, 412, 413, 411, 123, 306,
+ /* 520 */ 160, 444, 445, 429, 265, 432, 3, 443, 449, 217,
+ /* 530 */ 432, 29, 377, 564, 349, 607, 921, 380, 921, 67,
+ /* 540 */ 216, 488, 447, 448, 492, 61, 60, 309, 453, 454,
+ /* 550 */ 450, 450, 63, 63, 62, 62, 62, 62, 148, 64,
+ /* 560 */ 64, 64, 64, 65, 65, 66, 66, 66, 67, 216,
+ /* 570 */ 304, 446, 389, 217, 525, 23, 492, 604, 124, 411,
+ /* 580 */ 487, 396, 474, 222, 412, 413, 531, 607, 920, 333,
+ /* 590 */ 920, 456, 456, 333, 411, 456, 456, 475, 443, 449,
+ /* 600 */ 214, 333, 286, 456, 456, 249, 333, 532, 456, 456,
+ /* 610 */ 489, 566, 476, 395, 340, 252, 61, 60, 309, 453,
+ /* 620 */ 454, 450, 450, 63, 63, 62, 62, 62, 62, 604,
+ /* 630 */ 64, 64, 64, 64, 65, 65, 66, 66, 66, 67,
+ /* 640 */ 216, 304, 289, 330, 287, 268, 412, 413, 330, 159,
+ /* 650 */ 853, 21, 330, 503, 330, 436, 330, 257, 330, 314,
+ /* 660 */ 330, 412, 413, 182, 567, 515, 432, 24, 258, 443,
+ /* 670 */ 449, 432, 33, 214, 487, 432, 54, 432, 53, 432,
+ /* 680 */ 99, 432, 97, 432, 102, 270, 386, 61, 60, 309,
+ /* 690 */ 453, 454, 450, 450, 63, 63, 62, 62, 62, 62,
+ /* 700 */ 331, 64, 64, 64, 64, 65, 65, 66, 66, 66,
+ /* 710 */ 67, 216, 304, 330, 560, 374, 560, 94, 306, 330,
+ /* 720 */ 234, 330, 436, 288, 330, 274, 330, 272, 330, 333,
+ /* 730 */ 330, 456, 456, 330, 603, 303, 432, 103, 405, 1,
+ /* 740 */ 443, 449, 432, 108, 432, 110, 492, 432, 16, 432,
+ /* 750 */ 100, 432, 34, 432, 98, 496, 432, 25, 61, 60,
+ /* 760 */ 309, 453, 454, 450, 450, 63, 63, 62, 62, 62,
+ /* 770 */ 62, 330, 64, 64, 64, 64, 65, 65, 66, 66,
+ /* 780 */ 66, 67, 216, 304, 330, 254, 330, 183, 184, 185,
+ /* 790 */ 330, 544, 330, 486, 432, 55, 330, 496, 330, 215,
+ /* 800 */ 330, 600, 20, 330, 410, 384, 56, 432, 111, 432,
+ /* 810 */ 112, 443, 449, 432, 113, 432, 26, 311, 5, 432,
+ /* 820 */ 37, 432, 38, 432, 27, 276, 432, 39, 264, 61,
+ /* 830 */ 60, 309, 453, 454, 450, 450, 63, 63, 62, 62,
+ /* 840 */ 62, 62, 330, 64, 64, 64, 64, 65, 65, 66,
+ /* 850 */ 66, 66, 67, 216, 304, 330, 202, 330, 431, 375,
+ /* 860 */ 420, 330, 430, 330, 317, 432, 40, 277, 330, 487,
+ /* 870 */ 330, 233, 330, 421, 330, 177, 161, 496, 432, 41,
+ /* 880 */ 432, 43, 443, 449, 432, 44, 432, 45, 276, 276,
+ /* 890 */ 433, 432, 30, 432, 31, 432, 46, 432, 47, 264,
+ /* 900 */ 61, 71, 309, 453, 454, 450, 450, 63, 63, 62,
+ /* 910 */ 62, 62, 62, 330, 64, 64, 64, 64, 65, 65,
+ /* 920 */ 66, 66, 66, 67, 216, 304, 330, 276, 330, 276,
+ /* 930 */ 578, 580, 330, 157, 330, 318, 432, 48, 159, 319,
+ /* 940 */ 352, 330, 276, 323, 119, 463, 463, 422, 332, 432,
+ /* 950 */ 49, 432, 32, 443, 449, 432, 10, 432, 51, 276,
+ /* 960 */ 276, 276, 186, 487, 432, 52, 466, 433, 200, 399,
+ /* 970 */ 115, 581, 60, 309, 453, 454, 450, 450, 63, 63,
+ /* 980 */ 62, 62, 62, 62, 582, 64, 64, 64, 64, 65,
+ /* 990 */ 65, 66, 66, 66, 67, 216, 304, 189, 192, 605,
+ /* 1000 */ 482, 231, 232, 292, 458, 494, 22, 179, 439, 483,
+ /* 1010 */ 520, 521, 530, 529, 535, 267, 186, 186, 366, 401,
+ /* 1020 */ 186, 565, 342, 186, 443, 449, 451, 573, 574, 179,
+ /* 1030 */ 92, 433, 433, 585, 18, 92, 602, 478, 302, 523,
+ /* 1040 */ 606, 351, 491, 495, 309, 453, 454, 450, 450, 63,
+ /* 1050 */ 63, 62, 62, 62, 62, 497, 64, 64, 64, 64,
+ /* 1060 */ 65, 65, 66, 66, 66, 67, 216, 165, 262, 85,
+ /* 1070 */ 527, 528, 235, 236, 237, 168, 239, 533, 105, 534,
+ /* 1080 */ 263, 546, 269, 73, 337, 8, 4, 195, 271, 273,
+ /* 1090 */ 308, 211, 275, 294, 280, 371, 379, 382, 383, 334,
+ /* 1100 */ 283, 284, 295, 285, 577, 587, 293, 296, 297, 599,
+ /* 1110 */ 147, 242, 462, 423, 209, 464, 569, 339, 338, 250,
+ /* 1120 */ 208, 481, 526, 210, 572, 484, 437, 469, 259, 537,
+ /* 1130 */ 540, 290, 393, 584, 166, 409, 417, 418, 536, 538,
+ /* 1140 */ 330, 7, 326, 361, 419, 167, 85, 76, 75, 156,
+ /* 1150 */ 169, 347, 345, 84, 327, 176, 74, 328, 329, 58,
+ /* 1160 */ 434, 438, 80, 432, 35, 479, 392, 291, 281, 243,
+ /* 1170 */ 246, 244, 305, 245, 121, 86, 435, 214, 350, 214,
+ /* 1180 */ 356, 513, 518, 433, 251, 313, 260, 523, 125, 493,
+ /* 1190 */ 499, 519, 253, 440, 440, 440, 441, 442, 11, 73,
+ /* 1200 */ 337, 398, 4, 522, 219, 344, 308, 500, 524, 255,
+ /* 1210 */ 343, 226, 368, 300, 225, 334, 73, 337, 227, 4,
+ /* 1220 */ 541, 547, 548, 308, 549, 190, 301, 555, 191, 372,
+ /* 1230 */ 370, 193, 334, 339, 194, 557, 89, 196, 278, 378,
+ /* 1240 */ 558, 117, 568, 469, 199, 133, 390, 391, 575, 143,
+ /* 1250 */ 339, 134, 135, 583, 136, 139, 137, 142, 322, 596,
+ /* 1260 */ 469, 93, 96, 76, 75, 502, 597, 598, 601, 101,
+ /* 1270 */ 224, 104, 74, 328, 329, 107, 407, 438, 238, 424,
+ /* 1280 */ 76, 75, 118, 455, 650, 651, 172, 173, 452, 74,
+ /* 1290 */ 328, 329, 324, 72, 438, 459, 468, 471, 144, 158,
+ /* 1300 */ 6, 472, 13, 473, 175, 477, 82, 490, 12, 440,
+ /* 1310 */ 440, 440, 441, 442, 11, 122, 498, 180, 164, 506,
+ /* 1320 */ 507, 87, 116, 223, 126, 127, 440, 440, 440, 441,
+ /* 1330 */ 442, 11, 266, 88, 128, 188, 360, 365, 258, 369,
+ /* 1340 */ 146, 556, 129, 179, 130, 373, 559, 279, 563, 197,
+ /* 1350 */ 131, 9, 571, 201, 132, 14, 203, 576, 204, 579,
+ /* 1360 */ 138, 205, 90, 141, 91, 140, 15, 106, 594, 586,
+ /* 1370 */ 400, 298, 212, 404, 149, 608,
};
static const YYCODETYPE yy_lookahead[] = {
- /* 0 */ 19, 142, 143, 144, 145, 24, 113, 26, 72, 73,
- /* 10 */ 74, 75, 87, 77, 78, 79, 80, 81, 82, 83,
- /* 20 */ 84, 85, 86, 87, 1, 2, 45, 46, 76, 77,
+ /* 0 */ 19, 142, 143, 144, 145, 24, 150, 26, 74, 75,
+ /* 10 */ 76, 77, 115, 79, 80, 81, 82, 83, 84, 85,
+ /* 20 */ 86, 87, 88, 89, 150, 165, 166, 167, 47, 48,
/* 30 */ 78, 79, 80, 81, 82, 83, 84, 85, 86, 87,
- /* 40 */ 61, 165, 166, 167, 63, 64, 65, 66, 67, 68,
- /* 50 */ 69, 70, 71, 72, 73, 74, 75, 25, 77, 78,
- /* 60 */ 79, 80, 81, 82, 83, 84, 85, 86, 87, 19,
- /* 70 */ 91, 19, 91, 173, 95, 25, 77, 78, 79, 80,
- /* 80 */ 81, 82, 83, 84, 85, 86, 87, 81, 82, 83,
- /* 90 */ 84, 85, 86, 87, 173, 45, 46, 146, 147, 49,
- /* 100 */ 81, 82, 22, 152, 26, 150, 26, 128, 129, 130,
- /* 110 */ 159, 86, 87, 63, 64, 65, 66, 67, 68, 69,
- /* 120 */ 70, 71, 72, 73, 74, 75, 185, 77, 78, 79,
- /* 130 */ 80, 81, 82, 83, 84, 85, 86, 87, 19, 87,
- /* 140 */ 25, 61, 150, 19, 193, 93, 94, 95, 96, 97,
- /* 150 */ 98, 99, 160, 161, 171, 172, 25, 125, 106, 81,
- /* 160 */ 82, 81, 82, 180, 45, 46, 47, 212, 217, 91,
- /* 170 */ 92, 91, 150, 172, 26, 95, 184, 185, 185, 101,
- /* 180 */ 102, 180, 63, 64, 65, 66, 67, 68, 69, 70,
- /* 190 */ 71, 72, 73, 74, 75, 244, 77, 78, 79, 80,
- /* 200 */ 81, 82, 83, 84, 85, 86, 87, 19, 128, 129,
- /* 210 */ 130, 87, 24, 26, 192, 100, 150, 150, 94, 95,
- /* 220 */ 96, 97, 98, 99, 93, 150, 25, 96, 97, 98,
- /* 230 */ 106, 150, 194, 45, 46, 169, 170, 150, 107, 91,
- /* 240 */ 173, 174, 165, 83, 84, 85, 86, 87, 173, 174,
- /* 250 */ 169, 63, 64, 65, 66, 67, 68, 69, 70, 71,
- /* 260 */ 72, 73, 74, 75, 242, 77, 78, 79, 80, 81,
- /* 270 */ 82, 83, 84, 85, 86, 87, 19, 11, 91, 92,
- /* 280 */ 93, 204, 215, 96, 97, 98, 196, 220, 213, 214,
- /* 290 */ 150, 190, 150, 203, 107, 52, 230, 231, 221, 159,
- /* 300 */ 223, 224, 45, 46, 221, 93, 223, 224, 96, 97,
- /* 310 */ 98, 230, 231, 173, 174, 173, 174, 116, 52, 107,
- /* 320 */ 63, 64, 65, 66, 67, 68, 69, 70, 71, 72,
- /* 330 */ 73, 74, 75, 193, 77, 78, 79, 80, 81, 82,
- /* 340 */ 83, 84, 85, 86, 87, 102, 103, 104, 150, 19,
- /* 350 */ 12, 221, 222, 223, 224, 215, 113, 159, 162, 150,
- /* 360 */ 220, 165, 166, 167, 150, 27, 95, 225, 102, 103,
- /* 370 */ 104, 173, 174, 26, 150, 45, 46, 106, 40, 113,
- /* 380 */ 42, 150, 173, 174, 159, 165, 221, 159, 223, 224,
- /* 390 */ 52, 193, 135, 63, 64, 65, 66, 67, 68, 69,
- /* 400 */ 70, 71, 72, 73, 74, 75, 241, 77, 78, 79,
- /* 410 */ 80, 81, 82, 83, 84, 85, 86, 87, 193, 19,
- /* 420 */ 150, 193, 19, 214, 204, 150, 23, 150, 81, 150,
- /* 430 */ 216, 150, 157, 205, 206, 160, 161, 110, 91, 92,
- /* 440 */ 22, 114, 217, 212, 26, 159, 46, 150, 45, 46,
- /* 450 */ 173, 174, 173, 174, 173, 174, 168, 169, 170, 234,
- /* 460 */ 159, 168, 169, 170, 239, 135, 63, 64, 65, 66,
- /* 470 */ 67, 68, 69, 70, 71, 72, 73, 74, 75, 193,
- /* 480 */ 77, 78, 79, 80, 81, 82, 83, 84, 85, 86,
- /* 490 */ 87, 19, 215, 23, 193, 23, 33, 207, 219, 150,
- /* 500 */ 219, 101, 23, 217, 22, 150, 106, 23, 26, 91,
- /* 510 */ 92, 45, 46, 180, 181, 154, 53, 45, 46, 231,
- /* 520 */ 187, 150, 173, 174, 231, 239, 22, 23, 109, 25,
- /* 530 */ 111, 112, 66, 67, 150, 63, 64, 65, 66, 67,
- /* 540 */ 68, 69, 70, 71, 72, 73, 74, 75, 150, 77,
- /* 550 */ 78, 79, 80, 81, 82, 83, 84, 85, 86, 87,
- /* 560 */ 19, 95, 22, 23, 23, 25, 62, 150, 105, 12,
- /* 570 */ 26, 23, 26, 91, 92, 23, 192, 25, 148, 109,
- /* 580 */ 26, 111, 112, 212, 27, 26, 45, 46, 109, 228,
- /* 590 */ 111, 112, 17, 109, 233, 111, 112, 40, 24, 42,
- /* 600 */ 26, 150, 62, 186, 63, 64, 65, 66, 67, 68,
- /* 610 */ 69, 70, 71, 72, 73, 74, 75, 150, 77, 78,
- /* 620 */ 79, 80, 81, 82, 83, 84, 85, 86, 87, 19,
- /* 630 */ 55, 195, 57, 23, 165, 91, 92, 91, 92, 94,
- /* 640 */ 173, 174, 83, 150, 92, 91, 92, 0, 1, 2,
- /* 650 */ 91, 92, 7, 8, 9, 45, 46, 109, 113, 111,
- /* 660 */ 112, 117, 150, 117, 22, 91, 173, 174, 26, 117,
- /* 670 */ 189, 190, 127, 63, 64, 65, 66, 67, 68, 69,
- /* 680 */ 70, 71, 72, 73, 74, 75, 150, 77, 78, 79,
- /* 690 */ 80, 81, 82, 83, 84, 85, 86, 87, 19, 102,
- /* 700 */ 103, 104, 19, 24, 192, 150, 189, 190, 150, 173,
- /* 710 */ 174, 150, 137, 150, 28, 150, 150, 150, 32, 102,
- /* 720 */ 103, 104, 247, 248, 45, 46, 160, 161, 173, 174,
- /* 730 */ 44, 173, 174, 91, 173, 174, 173, 174, 173, 174,
- /* 740 */ 173, 174, 63, 64, 65, 66, 67, 68, 69, 70,
- /* 750 */ 71, 72, 73, 74, 75, 150, 77, 78, 79, 80,
- /* 760 */ 81, 82, 83, 84, 85, 86, 87, 19, 150, 144,
- /* 770 */ 145, 159, 150, 164, 150, 113, 150, 22, 173, 174,
- /* 780 */ 150, 150, 173, 150, 25, 150, 150, 150, 22, 127,
- /* 790 */ 24, 173, 174, 45, 46, 173, 174, 173, 174, 173,
- /* 800 */ 174, 118, 17, 173, 174, 193, 173, 174, 150, 173,
- /* 810 */ 174, 63, 64, 65, 66, 67, 68, 69, 70, 71,
- /* 820 */ 72, 73, 74, 75, 150, 77, 78, 79, 80, 81,
- /* 830 */ 82, 83, 84, 85, 86, 87, 19, 150, 245, 246,
- /* 840 */ 55, 150, 57, 150, 83, 150, 150, 173, 174, 150,
- /* 850 */ 192, 92, 150, 216, 150, 205, 206, 150, 128, 129,
- /* 860 */ 173, 174, 45, 46, 173, 174, 173, 174, 173, 174,
- /* 870 */ 115, 110, 173, 174, 165, 114, 117, 173, 174, 150,
- /* 880 */ 63, 64, 65, 66, 67, 68, 69, 70, 71, 72,
- /* 890 */ 73, 74, 75, 150, 77, 78, 79, 80, 81, 82,
- /* 900 */ 83, 84, 85, 86, 87, 19, 150, 150, 150, 182,
- /* 910 */ 150, 159, 150, 204, 150, 186, 173, 174, 150, 30,
- /* 920 */ 19, 150, 134, 150, 136, 150, 37, 7, 8, 173,
- /* 930 */ 174, 45, 46, 173, 174, 173, 174, 173, 174, 165,
- /* 940 */ 150, 173, 174, 186, 186, 193, 173, 174, 173, 174,
- /* 950 */ 64, 65, 66, 67, 68, 69, 70, 71, 72, 73,
- /* 960 */ 74, 75, 150, 77, 78, 79, 80, 81, 82, 83,
- /* 970 */ 84, 85, 86, 87, 19, 150, 150, 21, 204, 150,
- /* 980 */ 23, 150, 25, 150, 150, 173, 174, 150, 23, 23,
- /* 990 */ 25, 25, 150, 23, 150, 25, 95, 150, 173, 174,
- /* 1000 */ 45, 46, 173, 174, 173, 174, 173, 174, 46, 150,
- /* 1010 */ 173, 174, 186, 150, 58, 173, 174, 173, 174, 150,
- /* 1020 */ 65, 66, 67, 68, 69, 70, 71, 72, 73, 74,
- /* 1030 */ 75, 150, 77, 78, 79, 80, 81, 82, 83, 84,
- /* 1040 */ 85, 86, 87, 5, 150, 150, 159, 159, 10, 11,
- /* 1050 */ 12, 13, 14, 97, 16, 192, 22, 94, 95, 19,
- /* 1060 */ 20, 192, 22, 101, 23, 150, 26, 29, 23, 31,
- /* 1070 */ 25, 150, 182, 192, 34, 23, 38, 25, 182, 150,
- /* 1080 */ 193, 193, 23, 23, 25, 25, 192, 192, 50, 150,
- /* 1090 */ 52, 51, 150, 137, 56, 150, 150, 59, 23, 235,
- /* 1100 */ 25, 61, 236, 62, 23, 71, 25, 153, 150, 150,
- /* 1110 */ 150, 150, 195, 197, 150, 165, 232, 150, 150, 150,
- /* 1120 */ 227, 81, 82, 150, 150, 150, 150, 150, 176, 232,
- /* 1130 */ 90, 91, 92, 208, 181, 95, 198, 6, 208, 208,
- /* 1140 */ 102, 103, 104, 149, 165, 198, 108, 176, 176, 165,
- /* 1150 */ 149, 113, 149, 113, 176, 149, 176, 13, 177, 151,
- /* 1160 */ 19, 20, 151, 22, 25, 158, 122, 26, 128, 129,
- /* 1170 */ 130, 131, 132, 133, 125, 34, 138, 123, 193, 121,
- /* 1180 */ 198, 124, 199, 19, 20, 134, 22, 200, 202, 201,
- /* 1190 */ 26, 115, 51, 156, 101, 156, 101, 120, 34, 210,
- /* 1200 */ 209, 209, 61, 210, 209, 175, 210, 175, 43, 183,
- /* 1210 */ 175, 100, 22, 177, 87, 51, 226, 175, 18, 155,
- /* 1220 */ 155, 178, 81, 82, 83, 61, 229, 229, 175, 183,
- /* 1230 */ 175, 90, 91, 92, 178, 156, 95, 175, 156, 155,
- /* 1240 */ 41, 156, 156, 134, 155, 81, 82, 237, 156, 63,
- /* 1250 */ 238, 188, 22, 156, 90, 91, 92, 188, 18, 95,
- /* 1260 */ 156, 191, 191, 191, 198, 218, 198, 36, 188, 128,
- /* 1270 */ 129, 130, 131, 132, 133, 156, 156, 140, 191, 218,
- /* 1280 */ 163, 179, 179, 1, 15, 23, 115, 115, 240, 115,
- /* 1290 */ 240, 115, 128, 129, 130, 131, 132, 133, 95, 110,
- /* 1300 */ 22, 11, 23, 23, 23, 22, 22, 119, 23, 117,
- /* 1310 */ 243, 25, 23, 25, 119, 22, 25, 119, 23, 246,
- /* 1320 */ 118, 115, 23, 249, 47, 22, 22, 35, 23, 22,
- /* 1330 */ 22, 22, 99, 106, 47, 19, 24, 20, 101, 39,
- /* 1340 */ 25, 47, 137, 101, 22, 48, 48, 5, 1, 105,
- /* 1350 */ 54, 126, 22, 1, 116, 17, 120, 20, 105, 116,
- /* 1360 */ 126, 22, 127, 23, 15, 17, 60, 139, 22, 3,
- /* 1370 */ 250, 4, 71, 71,
+ /* 40 */ 88, 89, 186, 169, 170, 85, 65, 66, 67, 68,
+ /* 50 */ 69, 70, 71, 72, 73, 74, 75, 76, 77, 89,
+ /* 60 */ 79, 80, 81, 82, 83, 84, 85, 86, 87, 88,
+ /* 70 */ 89, 19, 112, 19, 93, 173, 116, 25, 79, 80,
+ /* 80 */ 81, 82, 83, 84, 85, 86, 87, 88, 89, 1,
+ /* 90 */ 2, 26, 83, 84, 85, 86, 87, 88, 89, 47,
+ /* 100 */ 48, 180, 181, 51, 230, 231, 22, 22, 187, 26,
+ /* 110 */ 221, 26, 223, 224, 0, 1, 2, 65, 66, 67,
+ /* 120 */ 68, 69, 70, 71, 72, 73, 74, 75, 76, 77,
+ /* 130 */ 241, 79, 80, 81, 82, 83, 84, 85, 86, 87,
+ /* 140 */ 88, 89, 19, 89, 7, 8, 9, 19, 63, 95,
+ /* 150 */ 96, 97, 98, 99, 100, 101, 150, 28, 93, 94,
+ /* 160 */ 95, 32, 108, 98, 99, 100, 83, 84, 83, 84,
+ /* 170 */ 47, 48, 49, 25, 109, 46, 93, 94, 93, 173,
+ /* 180 */ 174, 165, 97, 26, 83, 84, 103, 104, 65, 66,
+ /* 190 */ 67, 68, 69, 70, 71, 72, 73, 74, 75, 76,
+ /* 200 */ 77, 117, 79, 80, 81, 82, 83, 84, 85, 86,
+ /* 210 */ 87, 88, 89, 19, 129, 130, 131, 89, 24, 150,
+ /* 220 */ 204, 150, 63, 173, 96, 97, 98, 99, 100, 101,
+ /* 230 */ 150, 225, 221, 222, 223, 224, 108, 221, 185, 223,
+ /* 240 */ 224, 47, 48, 95, 173, 174, 98, 99, 100, 54,
+ /* 250 */ 93, 94, 93, 173, 174, 186, 97, 109, 159, 65,
+ /* 260 */ 66, 67, 68, 69, 70, 71, 72, 73, 74, 75,
+ /* 270 */ 76, 77, 150, 79, 80, 81, 82, 83, 84, 85,
+ /* 280 */ 86, 87, 88, 89, 19, 11, 215, 172, 129, 130,
+ /* 290 */ 131, 220, 193, 213, 214, 180, 146, 147, 26, 104,
+ /* 300 */ 105, 106, 152, 85, 86, 87, 88, 89, 186, 159,
+ /* 310 */ 115, 95, 47, 48, 98, 99, 100, 162, 185, 22,
+ /* 320 */ 165, 166, 167, 26, 221, 109, 223, 224, 54, 150,
+ /* 330 */ 65, 66, 67, 68, 69, 70, 71, 72, 73, 74,
+ /* 340 */ 75, 76, 77, 193, 79, 80, 81, 82, 83, 84,
+ /* 350 */ 85, 86, 87, 88, 89, 83, 19, 221, 150, 223,
+ /* 360 */ 224, 171, 172, 150, 150, 93, 94, 217, 160, 161,
+ /* 370 */ 180, 26, 24, 150, 26, 150, 189, 190, 104, 105,
+ /* 380 */ 106, 159, 169, 194, 47, 48, 150, 173, 174, 115,
+ /* 390 */ 93, 94, 184, 185, 244, 216, 173, 174, 173, 174,
+ /* 400 */ 159, 136, 65, 66, 67, 68, 69, 70, 71, 72,
+ /* 410 */ 73, 74, 75, 76, 77, 193, 79, 80, 81, 82,
+ /* 420 */ 83, 84, 85, 86, 87, 88, 89, 150, 19, 159,
+ /* 430 */ 12, 150, 23, 219, 193, 19, 159, 214, 93, 217,
+ /* 440 */ 215, 93, 150, 230, 231, 27, 205, 206, 26, 157,
+ /* 450 */ 173, 174, 160, 161, 173, 174, 47, 48, 154, 190,
+ /* 460 */ 42, 239, 44, 193, 48, 25, 168, 169, 170, 22,
+ /* 470 */ 193, 24, 54, 136, 65, 66, 67, 68, 69, 70,
+ /* 480 */ 71, 72, 73, 74, 75, 76, 77, 217, 79, 80,
+ /* 490 */ 81, 82, 83, 84, 85, 86, 87, 88, 89, 19,
+ /* 500 */ 219, 23, 150, 23, 234, 23, 135, 150, 137, 239,
+ /* 510 */ 168, 169, 170, 23, 164, 93, 94, 26, 23, 103,
+ /* 520 */ 150, 47, 48, 173, 108, 173, 174, 47, 48, 231,
+ /* 530 */ 173, 174, 228, 21, 150, 22, 23, 233, 25, 88,
+ /* 540 */ 89, 119, 68, 69, 165, 65, 66, 67, 68, 69,
+ /* 550 */ 70, 71, 72, 73, 74, 75, 76, 77, 118, 79,
+ /* 560 */ 80, 81, 82, 83, 84, 85, 86, 87, 88, 89,
+ /* 570 */ 19, 97, 60, 231, 23, 22, 165, 64, 23, 26,
+ /* 580 */ 25, 96, 12, 204, 93, 94, 34, 22, 23, 111,
+ /* 590 */ 25, 113, 114, 111, 26, 113, 114, 27, 47, 48,
+ /* 600 */ 115, 111, 17, 113, 114, 150, 111, 55, 113, 114,
+ /* 610 */ 119, 99, 42, 128, 44, 204, 65, 66, 67, 68,
+ /* 620 */ 69, 70, 71, 72, 73, 74, 75, 76, 77, 64,
+ /* 630 */ 79, 80, 81, 82, 83, 84, 85, 86, 87, 88,
+ /* 640 */ 89, 19, 57, 150, 59, 23, 93, 94, 150, 94,
+ /* 650 */ 138, 22, 150, 85, 150, 26, 150, 97, 150, 107,
+ /* 660 */ 150, 93, 94, 48, 189, 190, 173, 174, 108, 47,
+ /* 670 */ 48, 173, 174, 115, 119, 173, 174, 173, 174, 173,
+ /* 680 */ 174, 173, 174, 173, 174, 17, 128, 65, 66, 67,
+ /* 690 */ 68, 69, 70, 71, 72, 73, 74, 75, 76, 77,
+ /* 700 */ 150, 79, 80, 81, 82, 83, 84, 85, 86, 87,
+ /* 710 */ 88, 89, 19, 150, 104, 105, 106, 24, 103, 150,
+ /* 720 */ 148, 150, 93, 138, 150, 57, 150, 59, 150, 111,
+ /* 730 */ 150, 113, 114, 150, 247, 248, 173, 174, 144, 145,
+ /* 740 */ 47, 48, 173, 174, 173, 174, 165, 173, 174, 173,
+ /* 750 */ 174, 173, 174, 173, 174, 150, 173, 174, 65, 66,
+ /* 760 */ 67, 68, 69, 70, 71, 72, 73, 74, 75, 76,
+ /* 770 */ 77, 150, 79, 80, 81, 82, 83, 84, 85, 86,
+ /* 780 */ 87, 88, 89, 19, 150, 204, 150, 104, 105, 106,
+ /* 790 */ 150, 150, 150, 207, 173, 174, 150, 150, 150, 196,
+ /* 800 */ 150, 160, 161, 150, 150, 150, 203, 173, 174, 173,
+ /* 810 */ 174, 47, 48, 173, 174, 173, 174, 212, 195, 173,
+ /* 820 */ 174, 173, 174, 173, 174, 150, 173, 174, 150, 65,
+ /* 830 */ 66, 67, 68, 69, 70, 71, 72, 73, 74, 75,
+ /* 840 */ 76, 77, 150, 79, 80, 81, 82, 83, 84, 85,
+ /* 850 */ 86, 87, 88, 89, 19, 150, 159, 150, 112, 212,
+ /* 860 */ 150, 150, 116, 150, 186, 173, 174, 192, 150, 25,
+ /* 870 */ 150, 216, 150, 150, 150, 205, 206, 150, 173, 174,
+ /* 880 */ 173, 174, 47, 48, 173, 174, 173, 174, 150, 150,
+ /* 890 */ 193, 173, 174, 173, 174, 173, 174, 173, 174, 150,
+ /* 900 */ 65, 66, 67, 68, 69, 70, 71, 72, 73, 74,
+ /* 910 */ 75, 76, 77, 150, 79, 80, 81, 82, 83, 84,
+ /* 920 */ 85, 86, 87, 88, 89, 19, 150, 150, 150, 150,
+ /* 930 */ 192, 192, 150, 159, 150, 186, 173, 174, 94, 212,
+ /* 940 */ 19, 150, 150, 245, 246, 129, 130, 150, 19, 173,
+ /* 950 */ 174, 173, 174, 47, 48, 173, 174, 173, 174, 150,
+ /* 960 */ 150, 150, 25, 119, 173, 174, 165, 193, 25, 192,
+ /* 970 */ 150, 192, 66, 67, 68, 69, 70, 71, 72, 73,
+ /* 980 */ 74, 75, 76, 77, 192, 79, 80, 81, 82, 83,
+ /* 990 */ 84, 85, 86, 87, 88, 89, 19, 159, 159, 23,
+ /* 1000 */ 30, 192, 192, 192, 23, 23, 25, 25, 150, 39,
+ /* 1010 */ 7, 8, 96, 97, 23, 23, 25, 25, 23, 242,
+ /* 1020 */ 25, 23, 150, 25, 47, 48, 97, 23, 23, 25,
+ /* 1030 */ 25, 193, 193, 23, 22, 25, 23, 150, 25, 102,
+ /* 1040 */ 64, 120, 150, 150, 67, 68, 69, 70, 71, 72,
+ /* 1050 */ 73, 74, 75, 76, 77, 150, 79, 80, 81, 82,
+ /* 1060 */ 83, 84, 85, 86, 87, 88, 89, 5, 150, 126,
+ /* 1070 */ 150, 182, 10, 11, 12, 13, 14, 182, 16, 182,
+ /* 1080 */ 150, 150, 150, 19, 20, 73, 22, 235, 150, 150,
+ /* 1090 */ 26, 29, 150, 31, 150, 236, 150, 150, 150, 35,
+ /* 1100 */ 150, 150, 40, 150, 150, 150, 150, 150, 150, 150,
+ /* 1110 */ 195, 197, 232, 153, 52, 232, 54, 53, 227, 208,
+ /* 1120 */ 58, 176, 181, 61, 198, 176, 165, 63, 176, 165,
+ /* 1130 */ 165, 208, 208, 198, 6, 149, 149, 149, 176, 176,
+ /* 1140 */ 150, 25, 149, 177, 13, 151, 126, 83, 84, 159,
+ /* 1150 */ 151, 123, 122, 124, 158, 117, 92, 93, 94, 125,
+ /* 1160 */ 193, 97, 135, 173, 174, 156, 104, 105, 106, 198,
+ /* 1170 */ 201, 199, 110, 200, 156, 103, 202, 115, 121, 115,
+ /* 1180 */ 103, 175, 175, 193, 209, 45, 175, 102, 22, 210,
+ /* 1190 */ 210, 183, 209, 129, 130, 131, 132, 133, 134, 19,
+ /* 1200 */ 20, 139, 22, 177, 226, 215, 26, 210, 175, 209,
+ /* 1210 */ 220, 89, 18, 178, 229, 35, 19, 20, 229, 22,
+ /* 1220 */ 183, 175, 175, 26, 175, 155, 178, 156, 155, 43,
+ /* 1230 */ 156, 155, 35, 53, 156, 156, 135, 155, 237, 156,
+ /* 1240 */ 238, 65, 188, 63, 188, 22, 156, 18, 198, 218,
+ /* 1250 */ 53, 191, 191, 198, 191, 188, 191, 218, 156, 38,
+ /* 1260 */ 63, 240, 240, 83, 84, 85, 156, 156, 36, 163,
+ /* 1270 */ 179, 179, 92, 93, 94, 243, 1, 97, 15, 23,
+ /* 1280 */ 83, 84, 246, 112, 117, 117, 117, 117, 97, 92,
+ /* 1290 */ 93, 94, 249, 22, 97, 23, 23, 11, 22, 22,
+ /* 1300 */ 33, 23, 33, 23, 25, 23, 25, 119, 25, 129,
+ /* 1310 */ 130, 131, 132, 133, 134, 22, 120, 33, 117, 23,
+ /* 1320 */ 23, 22, 37, 49, 22, 22, 129, 130, 131, 132,
+ /* 1330 */ 133, 134, 23, 22, 22, 101, 49, 49, 108, 19,
+ /* 1340 */ 24, 20, 103, 25, 50, 41, 56, 138, 50, 103,
+ /* 1350 */ 22, 5, 1, 127, 107, 22, 118, 1, 17, 20,
+ /* 1360 */ 118, 121, 73, 127, 73, 107, 22, 17, 23, 128,
+ /* 1370 */ 62, 140, 15, 3, 22, 4,
};
-#define YY_SHIFT_USE_DFLT (-108)
+#define YY_SHIFT_USE_DFLT (-104)
#define YY_SHIFT_MAX 404
static const short yy_shift_ofst[] = {
- /* 0 */ 23, 1038, 1040, -19, 1040, 1164, 1164, 187, 78, 243,
- /* 10 */ 119, 1164, 1164, 1164, 1164, 1164, -48, 266, 347, 554,
- /* 20 */ 148, 19, 19, -107, 50, 188, 257, 330, 403, 472,
- /* 30 */ 541, 610, 679, 748, 817, 748, 748, 748, 748, 748,
- /* 40 */ 748, 748, 748, 748, 748, 748, 748, 748, 748, 748,
- /* 50 */ 748, 748, 748, 886, 955, 955, 1141, 1164, 1164, 1164,
- /* 60 */ 1164, 1164, 1164, 1164, 1164, 1164, 1164, 1164, 1164, 1164,
- /* 70 */ 1164, 1164, 1164, 1164, 1164, 1164, 1164, 1164, 1164, 1164,
- /* 80 */ 1164, 1164, 1164, 1164, 1164, 1164, 1164, 1164, 1164, 1164,
- /* 90 */ 1164, 1164, 1164, 1164, 1164, 1164, 1164, -64, -64, -1,
- /* 100 */ -1, 52, 6, 160, 400, 956, 554, 554, 25, 148,
- /* 110 */ -75, -108, -108, -108, 80, 124, 338, 338, 504, 540,
- /* 120 */ 647, 574, 554, 574, 574, 554, 554, 554, 554, 554,
- /* 130 */ 554, 554, 554, 554, 554, 554, 554, 554, 554, 554,
- /* 140 */ 554, 554, 545, 662, -107, -107, -107, -108, -108, -108,
- /* 150 */ -21, -21, 131, 212, 470, 418, 479, 484, 557, 544,
- /* 160 */ 546, 482, 548, 552, 559, 645, 554, 554, 554, 554,
- /* 170 */ 554, 761, 554, 554, 642, 554, 554, 759, 554, 554,
- /* 180 */ 554, 554, 554, 463, 463, 463, 554, 554, 554, 419,
- /* 190 */ 554, 554, 419, 554, 686, 597, 554, 554, 419, 554,
- /* 200 */ 554, 554, 419, 554, 554, 554, 419, 419, 554, 554,
- /* 210 */ 554, 554, 554, 766, 327, 201, 148, 730, 730, 788,
- /* 220 */ 889, 889, 683, 889, 962, 889, 148, 889, 148, 115,
- /* 230 */ 32, 683, 683, 32, 1131, 1131, 1131, 1131, 1144, 1144,
- /* 240 */ 1139, -107, 1049, 1044, 1054, 1058, 1057, 1051, 1076, 1076,
- /* 250 */ 1093, 1077, 1093, 1077, 1093, 1077, 1095, 1095, 1165, 1095,
- /* 260 */ 1111, 1095, 1190, 1127, 1127, 1165, 1095, 1095, 1095, 1190,
- /* 270 */ 1200, 1076, 1200, 1076, 1200, 1076, 1076, 1199, 1109, 1200,
- /* 280 */ 1076, 1186, 1186, 1230, 1049, 1076, 1240, 1240, 1240, 1240,
- /* 290 */ 1049, 1186, 1230, 1076, 1231, 1231, 1076, 1076, 1137, -108,
- /* 300 */ -108, -108, -108, -108, 466, 575, 617, 785, 755, 901,
- /* 310 */ 957, 965, 271, 920, 963, 966, 970, 1045, 1052, 1059,
- /* 320 */ 1060, 1075, 1034, 1081, 1041, 1282, 1269, 1262, 1171, 1172,
- /* 330 */ 1174, 1176, 1203, 1189, 1278, 1279, 1280, 1283, 1290, 1284,
- /* 340 */ 1281, 1286, 1285, 1289, 1288, 1188, 1291, 1195, 1288, 1192,
- /* 350 */ 1293, 1198, 1202, 1206, 1295, 1299, 1292, 1277, 1303, 1287,
- /* 360 */ 1304, 1305, 1307, 1308, 1294, 1309, 1233, 1227, 1316, 1317,
- /* 370 */ 1312, 1237, 1300, 1296, 1297, 1315, 1298, 1205, 1242, 1322,
- /* 380 */ 1342, 1347, 1244, 1301, 1302, 1225, 1330, 1238, 1352, 1338,
- /* 390 */ 1236, 1337, 1243, 1253, 1234, 1339, 1235, 1340, 1348, 1306,
- /* 400 */ 1349, 1228, 1346, 1366, 1367,
+ /* 0 */ 88, 1062, 1064, -19, 1064, 1197, 1197, 65, 83, 195,
+ /* 10 */ 123, 1197, 1197, 1197, 1197, 1197, -48, 274, 272, 157,
+ /* 20 */ 345, 101, 101, -103, 52, 194, 265, 337, 409, 480,
+ /* 30 */ 551, 622, 693, 764, 835, 764, 764, 764, 764, 764,
+ /* 40 */ 764, 764, 764, 764, 764, 764, 764, 764, 764, 764,
+ /* 50 */ 764, 764, 764, 906, 977, 977, 1180, 1197, 1197, 1197,
+ /* 60 */ 1197, 1197, 1197, 1197, 1197, 1197, 1197, 1197, 1197, 1197,
+ /* 70 */ 1197, 1197, 1197, 1197, 1197, 1197, 1197, 1197, 1197, 1197,
+ /* 80 */ 1197, 1197, 1197, 1197, 1197, 1197, 1197, 1197, 1197, 1197,
+ /* 90 */ 1197, 1197, 1197, 1197, 1197, 1197, 1197, -66, -66, -1,
+ /* 100 */ -1, 54, 9, 218, 416, 512, 157, 157, 451, 345,
+ /* 110 */ -30, -104, -104, -104, 85, 128, 418, 418, 513, 565,
+ /* 120 */ 114, 348, 157, 348, 348, 157, 157, 157, 157, 157,
+ /* 130 */ 157, 157, 157, 157, 157, 157, 157, 157, 157, 157,
+ /* 140 */ 157, 157, 485, 558, -103, -103, -103, -104, -104, -104,
+ /* 150 */ 159, 159, 148, 216, 478, 297, 482, 490, 570, 422,
+ /* 160 */ 491, 553, 495, 555, 568, 137, 157, 157, 157, 157,
+ /* 170 */ 157, -40, 157, 157, 629, 157, 157, 844, 157, 157,
+ /* 180 */ 157, 157, 157, 552, 552, 552, 157, 157, 157, 618,
+ /* 190 */ 157, 157, 618, 157, 129, 610, 157, 157, 618, 157,
+ /* 200 */ 157, 157, 618, 157, 157, 157, 618, 618, 157, 157,
+ /* 210 */ 157, 157, 157, 447, 746, 440, 345, 816, 816, 371,
+ /* 220 */ 970, 970, 921, 970, 615, 970, 345, 970, 345, 937,
+ /* 230 */ 943, 921, 921, 943, 1128, 1128, 1128, 1128, 1131, 1131,
+ /* 240 */ 1116, -103, 1020, 1028, 1029, 1030, 1034, 1027, 1038, 1038,
+ /* 250 */ 1072, 1057, 1072, 1057, 1072, 1057, 1077, 1077, 1140, 1077,
+ /* 260 */ 1085, 1077, 1166, 1122, 1122, 1140, 1077, 1077, 1077, 1166,
+ /* 270 */ 1194, 1038, 1194, 1038, 1194, 1038, 1038, 1186, 1101, 1194,
+ /* 280 */ 1038, 1176, 1176, 1223, 1020, 1038, 1229, 1229, 1229, 1229,
+ /* 290 */ 1020, 1176, 1223, 1038, 1221, 1221, 1038, 1038, 1232, -104,
+ /* 300 */ -104, -104, -104, -104, 474, 585, 683, 668, 84, 929,
+ /* 310 */ 981, 982, 560, 1003, 916, 991, 992, 995, 998, 1004,
+ /* 320 */ 1005, 1010, 1012, 1013, 976, 1275, 1263, 1256, 1167, 1168,
+ /* 330 */ 1169, 1170, 1191, 1171, 1271, 1272, 1273, 1276, 1286, 1277,
+ /* 340 */ 1278, 1279, 1280, 1282, 1281, 1267, 1283, 1269, 1281, 1188,
+ /* 350 */ 1293, 1284, 1196, 1201, 1296, 1297, 1285, 1274, 1299, 1287,
+ /* 360 */ 1302, 1309, 1303, 1311, 1288, 1312, 1234, 1230, 1320, 1321,
+ /* 370 */ 1316, 1239, 1304, 1290, 1294, 1318, 1298, 1209, 1246, 1328,
+ /* 380 */ 1346, 1351, 1247, 1289, 1291, 1226, 1333, 1238, 1356, 1341,
+ /* 390 */ 1240, 1339, 1242, 1258, 1236, 1344, 1241, 1345, 1350, 1308,
+ /* 400 */ 1357, 1231, 1352, 1370, 1371,
};
-#define YY_REDUCE_USE_DFLT (-142)
+#define YY_REDUCE_USE_DFLT (-145)
#define YY_REDUCE_MAX 303
static const short yy_reduce_ofst[] = {
- /* 0 */ -141, -49, 140, 77, 198, 67, 75, -8, 66, 225,
- /* 10 */ 165, 142, 209, 277, 279, 281, 130, 286, 81, 275,
- /* 20 */ 196, 288, 293, 228, 83, 83, 83, 83, 83, 83,
- /* 30 */ 83, 83, 83, 83, 83, 83, 83, 83, 83, 83,
- /* 40 */ 83, 83, 83, 83, 83, 83, 83, 83, 83, 83,
- /* 50 */ 83, 83, 83, 83, 83, 83, 349, 467, 493, 536,
- /* 60 */ 555, 558, 561, 563, 565, 567, 605, 618, 622, 624,
- /* 70 */ 626, 630, 633, 636, 674, 687, 691, 693, 695, 699,
- /* 80 */ 704, 743, 756, 760, 762, 764, 768, 773, 775, 812,
- /* 90 */ 825, 829, 831, 833, 837, 842, 844, 83, 83, 83,
- /* 100 */ 83, -17, 83, 83, 333, 361, 22, 566, 83, -124,
- /* 110 */ 83, 83, 83, 83, 609, 1, 481, 517, 475, 475,
- /* 120 */ 625, 220, -45, 709, 774, 417, 729, 757, 758, 384,
- /* 130 */ 231, 826, 214, 371, 512, 658, 863, 869, 881, 894,
- /* 140 */ 637, 895, 301, 612, 752, 887, 888, 90, 650, 593,
- /* 150 */ -100, -79, -59, -7, 38, 87, 38, 38, 101, 224,
- /* 160 */ 270, 297, 38, 290, 355, 430, 398, 451, 631, 696,
- /* 170 */ 702, 436, 355, 707, 469, 635, 771, 290, 790, 834,
- /* 180 */ 847, 859, 915, 727, 890, 896, 921, 929, 939, 38,
- /* 190 */ 942, 945, 38, 946, 864, 866, 958, 959, 38, 960,
- /* 200 */ 961, 964, 38, 967, 968, 969, 38, 38, 973, 974,
- /* 210 */ 975, 976, 977, 954, 917, 916, 950, 884, 897, 893,
- /* 220 */ 952, 971, 925, 972, 953, 978, 979, 980, 984, 981,
- /* 230 */ 938, 930, 931, 947, 994, 1001, 1003, 1006, 1008, 1011,
- /* 240 */ 1007, 985, 982, 983, 987, 988, 986, 990, 1037, 1039,
- /* 250 */ 991, 989, 992, 993, 995, 996, 1030, 1032, 1026, 1035,
- /* 260 */ 1036, 1042, 1043, 997, 998, 1046, 1053, 1055, 1062, 1056,
- /* 270 */ 1064, 1079, 1065, 1082, 1084, 1085, 1086, 1010, 1012, 1089,
- /* 280 */ 1092, 1063, 1069, 1047, 1066, 1097, 1070, 1071, 1072, 1087,
- /* 290 */ 1068, 1080, 1061, 1104, 1048, 1050, 1119, 1120, 1067, 1117,
- /* 300 */ 1102, 1103, 1073, 1074,
+ /* 0 */ -141, 150, 990, 16, 277, 71, 80, 208, -126, 270,
+ /* 10 */ -111, 6, 223, 225, 214, 281, 11, 222, 213, 292,
+ /* 20 */ 155, 298, 342, 241, 136, 136, 136, 136, 136, 136,
+ /* 30 */ 136, 136, 136, 136, 136, 136, 136, 136, 136, 136,
+ /* 40 */ 136, 136, 136, 136, 136, 136, 136, 136, 136, 136,
+ /* 50 */ 136, 136, 136, 136, 136, 136, 352, 357, 493, 498,
+ /* 60 */ 502, 504, 506, 508, 510, 563, 569, 571, 574, 576,
+ /* 70 */ 578, 580, 583, 621, 634, 636, 640, 642, 646, 648,
+ /* 80 */ 650, 653, 692, 705, 707, 711, 713, 718, 720, 722,
+ /* 90 */ 724, 763, 776, 778, 782, 784, 791, 136, 136, 136,
+ /* 100 */ 136, 190, 136, 136, -79, 304, 777, 641, 103, -140,
+ /* 110 */ 103, 103, 103, 103, 350, 115, 187, 475, 487, 487,
+ /* 120 */ 594, 379, 605, 411, 581, -144, 69, 122, 678, 675,
+ /* 130 */ 647, 749, 179, 727, 738, 739, 779, 792, 809, 810,
+ /* 140 */ 655, 811, 99, 697, 774, 838, 839, 603, 670, 698,
+ /* 150 */ -98, 50, 53, 133, 189, 236, 189, 189, 269, 370,
+ /* 160 */ 384, 455, 189, 586, 550, 572, 654, 710, 723, 797,
+ /* 170 */ 820, 623, 550, 858, 801, 872, 887, 586, 892, 893,
+ /* 180 */ 905, 918, 920, 889, 895, 897, 930, 931, 932, 189,
+ /* 190 */ 938, 939, 189, 942, 852, 859, 944, 946, 189, 947,
+ /* 200 */ 948, 950, 189, 951, 953, 954, 189, 189, 955, 956,
+ /* 210 */ 957, 958, 959, 960, 915, 914, 961, 880, 883, 891,
+ /* 220 */ 945, 949, 911, 952, 941, 962, 964, 963, 965, 966,
+ /* 230 */ 926, 923, 924, 935, 986, 987, 988, 993, 994, 999,
+ /* 240 */ 996, 967, 971, 972, 973, 969, 974, 978, 1009, 1018,
+ /* 250 */ 975, 979, 983, 980, 1000, 997, 1006, 1007, 1008, 1011,
+ /* 260 */ 1026, 1033, 1035, 985, 989, 1037, 1046, 1047, 1049, 1048,
+ /* 270 */ 1070, 1071, 1073, 1074, 1076, 1078, 1079, 1001, 1002, 1082,
+ /* 280 */ 1083, 1054, 1056, 1031, 1050, 1090, 1060, 1061, 1063, 1065,
+ /* 290 */ 1055, 1067, 1039, 1102, 1021, 1022, 1110, 1111, 1032, 1106,
+ /* 300 */ 1091, 1092, 1036, 1043,
};
static const YYACTIONTYPE yy_default[] = {
/* 0 */ 615, 929, 848, 736, 929, 848, 929, 929, 875, 929,
26, /* EXCLUSIVE => ID */
0, /* COMMIT => nothing */
26, /* END => ID */
- 0, /* ROLLBACK => nothing */
- 0, /* SAVEPOINT => nothing */
- 0, /* RELEASE => nothing */
+ 26, /* ROLLBACK => ID */
+ 26, /* SAVEPOINT => ID */
+ 26, /* RELEASE => ID */
0, /* TO => nothing */
0, /* CREATE => nothing */
0, /* TABLE => nothing */
26, /* ASC => ID */
26, /* ATTACH => ID */
26, /* BEFORE => ID */
+ 26, /* BY => ID */
26, /* CASCADE => ID */
26, /* CAST => ID */
+ 26, /* COLUMNKW => ID */
26, /* CONFLICT => ID */
26, /* DATABASE => ID */
26, /* DESC => ID */
0, /* FROM => nothing */
0, /* JOIN => nothing */
0, /* INDEXED => nothing */
- 0, /* BY => nothing */
0, /* USING => nothing */
0, /* ORDER => nothing */
0, /* GROUP => nothing */
0, /* INDEX => nothing */
0, /* ALTER => nothing */
0, /* ADD => nothing */
- 0, /* COLUMNKW => nothing */
};
#endif /* YYFALLBACK */
"EXISTS", "TEMP", "LP", "RP",
"AS", "COMMA", "ID", "ABORT",
"AFTER", "ANALYZE", "ASC", "ATTACH",
- "BEFORE", "CASCADE", "CAST", "CONFLICT",
- "DATABASE", "DESC", "DETACH", "EACH",
- "FAIL", "FOR", "IGNORE", "INITIALLY",
- "INSTEAD", "LIKE_KW", "MATCH", "KEY",
- "OF", "OFFSET", "PRAGMA", "RAISE",
- "REPLACE", "RESTRICT", "ROW", "TRIGGER",
- "VACUUM", "VIEW", "VIRTUAL", "REINDEX",
- "RENAME", "CTIME_KW", "ANY", "OR",
- "AND", "IS", "BETWEEN", "IN",
- "ISNULL", "NOTNULL", "NE", "EQ",
- "GT", "LE", "LT", "GE",
- "ESCAPE", "BITAND", "BITOR", "LSHIFT",
- "RSHIFT", "PLUS", "MINUS", "STAR",
- "SLASH", "REM", "CONCAT", "COLLATE",
- "UMINUS", "UPLUS", "BITNOT", "STRING",
- "JOIN_KW", "CONSTRAINT", "DEFAULT", "NULL",
- "PRIMARY", "UNIQUE", "CHECK", "REFERENCES",
- "AUTOINCR", "ON", "DELETE", "UPDATE",
- "INSERT", "SET", "DEFERRABLE", "FOREIGN",
- "DROP", "UNION", "ALL", "EXCEPT",
- "INTERSECT", "SELECT", "DISTINCT", "DOT",
- "FROM", "JOIN", "INDEXED", "BY",
- "USING", "ORDER", "GROUP", "HAVING",
- "LIMIT", "WHERE", "INTO", "VALUES",
- "INTEGER", "FLOAT", "BLOB", "REGISTER",
- "VARIABLE", "CASE", "WHEN", "THEN",
- "ELSE", "INDEX", "ALTER", "ADD",
- "COLUMNKW", "error", "input", "cmdlist",
+ "BEFORE", "BY", "CASCADE", "CAST",
+ "COLUMNKW", "CONFLICT", "DATABASE", "DESC",
+ "DETACH", "EACH", "FAIL", "FOR",
+ "IGNORE", "INITIALLY", "INSTEAD", "LIKE_KW",
+ "MATCH", "KEY", "OF", "OFFSET",
+ "PRAGMA", "RAISE", "REPLACE", "RESTRICT",
+ "ROW", "TRIGGER", "VACUUM", "VIEW",
+ "VIRTUAL", "REINDEX", "RENAME", "CTIME_KW",
+ "ANY", "OR", "AND", "IS",
+ "BETWEEN", "IN", "ISNULL", "NOTNULL",
+ "NE", "EQ", "GT", "LE",
+ "LT", "GE", "ESCAPE", "BITAND",
+ "BITOR", "LSHIFT", "RSHIFT", "PLUS",
+ "MINUS", "STAR", "SLASH", "REM",
+ "CONCAT", "COLLATE", "UMINUS", "UPLUS",
+ "BITNOT", "STRING", "JOIN_KW", "CONSTRAINT",
+ "DEFAULT", "NULL", "PRIMARY", "UNIQUE",
+ "CHECK", "REFERENCES", "AUTOINCR", "ON",
+ "DELETE", "UPDATE", "INSERT", "SET",
+ "DEFERRABLE", "FOREIGN", "DROP", "UNION",
+ "ALL", "EXCEPT", "INTERSECT", "SELECT",
+ "DISTINCT", "DOT", "FROM", "JOIN",
+ "INDEXED", "USING", "ORDER", "GROUP",
+ "HAVING", "LIMIT", "WHERE", "INTO",
+ "VALUES", "INTEGER", "FLOAT", "BLOB",
+ "REGISTER", "VARIABLE", "CASE", "WHEN",
+ "THEN", "ELSE", "INDEX", "ALTER",
+ "ADD", "error", "input", "cmdlist",
"ecmd", "explain", "cmdx", "cmd",
"transtype", "trans_opt", "nm", "savepoint_opt",
"create_table", "create_table_args", "temp", "ifnotexists",
if( yysize ){
yypParser->yyidx++;
yymsp -= yysize-1;
- yymsp->stateno = yyact;
- yymsp->major = yygoto;
+ yymsp->stateno = (YYACTIONTYPE)yyact;
+ yymsp->major = (YYCODETYPE)yygoto;
yymsp->minor = yygotominor;
}else
#endif
int i, c;
switch( *z ){
case ' ': case '\t': case '\n': case '\f': case '\r': {
- for(i=1; isspace(z[i]); i++){}
+ for(i=1; sqlite3Isspace(z[i]); i++){}
*tokenType = TK_SPACE;
return i;
}
}
case '.': {
#ifndef SQLITE_OMIT_FLOATING_POINT
- if( !isdigit(z[1]) )
+ if( !sqlite3Isdigit(z[1]) )
#endif
{
*tokenType = TK_DOT;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': {
*tokenType = TK_INTEGER;
- for(i=0; isdigit(z[i]); i++){}
+ for(i=0; sqlite3Isdigit(z[i]); i++){}
#ifndef SQLITE_OMIT_FLOATING_POINT
if( z[i]=='.' ){
i++;
- while( isdigit(z[i]) ){ i++; }
+ while( sqlite3Isdigit(z[i]) ){ i++; }
*tokenType = TK_FLOAT;
}
if( (z[i]=='e' || z[i]=='E') &&
- ( isdigit(z[i+1])
- || ((z[i+1]=='+' || z[i+1]=='-') && isdigit(z[i+2]))
+ ( sqlite3Isdigit(z[i+1])
+ || ((z[i+1]=='+' || z[i+1]=='-') && sqlite3Isdigit(z[i+2]))
)
){
i += 2;
- while( isdigit(z[i]) ){ i++; }
+ while( sqlite3Isdigit(z[i]) ){ i++; }
*tokenType = TK_FLOAT;
}
#endif
}
case '?': {
*tokenType = TK_VARIABLE;
- for(i=1; isdigit(z[i]); i++){}
+ for(i=1; sqlite3Isdigit(z[i]); i++){}
return i;
}
case '#': {
- for(i=1; isdigit(z[i]); i++){}
+ for(i=1; sqlite3Isdigit(z[i]); i++){}
if( i>1 ){
/* Parameters of the form #NNN (where NNN is a number) are used
** internally by sqlite3NestedParse. */
}else if( c=='(' && n>0 ){
do{
i++;
- }while( (c=z[i])!=0 && !isspace(c) && c!=')' );
+ }while( (c=z[i])!=0 && !sqlite3Isspace(c) && c!=')' );
if( c==')' ){
i++;
}else{
if( z[1]=='\'' ){
*tokenType = TK_BLOB;
for(i=2; (c=z[i])!=0 && c!='\''; i++){
- if( !isxdigit(c) ){
+ if( !sqlite3Isxdigit(c) ){
*tokenType = TK_ILLEGAL;
}
}
** reason. So we run it once during initialization.
*/
#ifndef NDEBUG
+#ifndef SQLITE_OMIT_FLOATING_POINT
/* This section of code's only "output" is via assert() statements. */
if ( rc==SQLITE_OK ){
u64 x = (((u64)1)<<63)-1;
memcpy(&y, &x, 8);
assert( sqlite3IsNaN(y) );
}
+#endif
#endif
return rc;
if( db->lookaside.nOut ){
return SQLITE_BUSY;
}
- if( sz<0 ) sz = 0;
+ /* Free any existing lookaside buffer for this handle before
+ ** allocating a new one so we don't have to have space for
+ ** both at the same time.
+ */
+ if( db->lookaside.bMalloced ){
+ sqlite3_free(db->lookaside.pStart);
+ }
+ /* The size of a lookaside slot needs to be larger than a pointer
+ ** to be useful.
+ */
+ if( sz<=(int)sizeof(LookasideSlot*) ) sz = 0;
if( cnt<0 ) cnt = 0;
- if( pBuf==0 ){
+ if( sz==0 || cnt==0 ){
+ sz = 0;
+ pStart = 0;
+ }else if( pBuf==0 ){
sz = (sz + 7)&~7;
sqlite3BeginBenignMalloc();
pStart = sqlite3Malloc( sz*cnt );
sz = sz&~7;
pStart = pBuf;
}
- if( db->lookaside.bMalloced ){
- sqlite3_free(db->lookaside.pStart);
- }
db->lookaside.pStart = pStart;
db->lookaside.pFree = 0;
db->lookaside.sz = (u16)sz;
- db->lookaside.bMalloced = pBuf==0 ?1:0;
if( pStart ){
int i;
LookasideSlot *p;
+ assert( sz > sizeof(LookasideSlot*) );
p = (LookasideSlot*)pStart;
for(i=cnt-1; i>=0; i--){
p->pNext = db->lookaside.pFree;
}
db->lookaside.pEnd = p;
db->lookaside.bEnabled = 1;
+ db->lookaside.bMalloced = pBuf==0 ?1:0;
}else{
db->lookaside.pEnd = 0;
db->lookaside.bEnabled = 0;
+ db->lookaside.bMalloced = 0;
}
return SQLITE_OK;
}
/* If there are any outstanding VMs, return SQLITE_BUSY. */
if( db->pVdbe ){
sqlite3Error(db, SQLITE_BUSY,
- "Unable to close due to unfinalised statements");
+ "unable to close due to unfinalised statements");
sqlite3_mutex_leave(db->mutex);
return SQLITE_BUSY;
}
assert( sqlite3SafetyCheckSickOrOk(db) );
+ for(j=0; j<db->nDb; j++){
+ Btree *pBt = db->aDb[j].pBt;
+ if( pBt && sqlite3BtreeIsInBackup(pBt) ){
+ sqlite3Error(db, SQLITE_BUSY,
+ "unable to close due to unfinished backup operation");
+ sqlite3_mutex_leave(db->mutex);
+ return SQLITE_BUSY;
+ }
+ }
+
/* Free any outstanding Savepoint structures. */
sqlite3CloseSavepoints(db);
if( p && p->iPrefEnc==enc && p->nArg==nArg ){
if( db->activeVdbeCnt ){
sqlite3Error(db, SQLITE_BUSY,
- "Unable to delete/modify user-function due to active statements");
+ "unable to delete/modify user-function due to active statements");
assert( !db->mallocFailed );
return SQLITE_BUSY;
}else{
if( pColl && pColl->xCmp ){
if( db->activeVdbeCnt ){
sqlite3Error(db, SQLITE_BUSY,
- "Unable to delete/modify collation sequence due to active statements");
+ "unable to delete/modify collation sequence due to active statements");
return SQLITE_BUSY;
}
sqlite3ExpirePreparedStatements(db);
sqlite3BenignMallocHooks(xBenignBegin, xBenignEnd);
break;
}
+
+ /*
+ ** sqlite3_test_control(PENDING_BYTE, unsigned int X)
+ **
+ ** Set the PENDING byte to the value in the argument, if X>0.
+ ** Make no changes if X==0. Return the value of the pending byte
+ ** as it existing before this routine was called.
+ **
+ ** IMPORTANT: Changing the PENDING byte from 0x40000000 results in
+ ** an incompatible database file format. Changing the PENDING byte
+ ** while any database connection is open results in undefined and
+ ** dileterious behavior.
+ */
+ case SQLITE_TESTCTRL_PENDING_BYTE: {
+ unsigned int newVal = va_arg(ap, unsigned int);
+ rc = sqlite3PendingByte;
+ if( newVal ) sqlite3PendingByte = newVal;
+ break;
+ }
}
va_end(ap);
#endif /* SQLITE_OMIT_BUILTIN_TEST */
** stemming has been performed). *pnBytes should be set to the length
** of this buffer in bytes. The input text that generated the token is
** identified by the byte offsets returned in *piStartOffset and
- ** *piEndOffset.
+ ** *piEndOffset. *piStartOffset should be set to the index of the first
+ ** byte of the token in the input buffer. *piEndOffset should be set
+ ** to the index of the first byte just past the end of the token in
+ ** the input buffer.
**
** The buffer *ppToken is set to point at is managed by the tokenizer
** implementation. It is only required to be valid until the next call
pRet->pPhrase->isNot = 1;
}
}
+ nConsumed = iEnd;
}
- nConsumed = iEnd;
pModule->xClose(pCursor);
}
projects / php / commitdiff