mirror of
https://codeberg.org/superseriousbusiness/gotosocial.git
synced 2024-12-21 16:34:26 +03:00
242 lines
10 KiB
Go
242 lines
10 KiB
Go
package vfs
|
|
|
|
import "github.com/ncruces/go-sqlite3/internal/util"
|
|
|
|
const (
|
|
_MAX_NAME = 1e6 // Self-imposed limit for most NUL terminated strings.
|
|
_MAX_SQL_LENGTH = 1e9
|
|
_MAX_PATHNAME = 1024
|
|
_DEFAULT_SECTOR_SIZE = 4096
|
|
|
|
ptrlen = 4
|
|
)
|
|
|
|
// https://sqlite.org/rescode.html
|
|
type _ErrorCode uint32
|
|
|
|
func (e _ErrorCode) Error() string {
|
|
return util.ErrorCodeString(uint32(e))
|
|
}
|
|
|
|
const (
|
|
_OK _ErrorCode = util.OK
|
|
_ERROR _ErrorCode = util.ERROR
|
|
_PERM _ErrorCode = util.PERM
|
|
_BUSY _ErrorCode = util.BUSY
|
|
_READONLY _ErrorCode = util.READONLY
|
|
_IOERR _ErrorCode = util.IOERR
|
|
_NOTFOUND _ErrorCode = util.NOTFOUND
|
|
_CANTOPEN _ErrorCode = util.CANTOPEN
|
|
_IOERR_READ _ErrorCode = util.IOERR_READ
|
|
_IOERR_SHORT_READ _ErrorCode = util.IOERR_SHORT_READ
|
|
_IOERR_WRITE _ErrorCode = util.IOERR_WRITE
|
|
_IOERR_FSYNC _ErrorCode = util.IOERR_FSYNC
|
|
_IOERR_DIR_FSYNC _ErrorCode = util.IOERR_DIR_FSYNC
|
|
_IOERR_TRUNCATE _ErrorCode = util.IOERR_TRUNCATE
|
|
_IOERR_FSTAT _ErrorCode = util.IOERR_FSTAT
|
|
_IOERR_UNLOCK _ErrorCode = util.IOERR_UNLOCK
|
|
_IOERR_RDLOCK _ErrorCode = util.IOERR_RDLOCK
|
|
_IOERR_DELETE _ErrorCode = util.IOERR_DELETE
|
|
_IOERR_ACCESS _ErrorCode = util.IOERR_ACCESS
|
|
_IOERR_CHECKRESERVEDLOCK _ErrorCode = util.IOERR_CHECKRESERVEDLOCK
|
|
_IOERR_LOCK _ErrorCode = util.IOERR_LOCK
|
|
_IOERR_CLOSE _ErrorCode = util.IOERR_CLOSE
|
|
_IOERR_SHMOPEN _ErrorCode = util.IOERR_SHMOPEN
|
|
_IOERR_SHMSIZE _ErrorCode = util.IOERR_SHMSIZE
|
|
_IOERR_SHMLOCK _ErrorCode = util.IOERR_SHMLOCK
|
|
_IOERR_SHMMAP _ErrorCode = util.IOERR_SHMMAP
|
|
_IOERR_SEEK _ErrorCode = util.IOERR_SEEK
|
|
_IOERR_DELETE_NOENT _ErrorCode = util.IOERR_DELETE_NOENT
|
|
_IOERR_GETTEMPPATH _ErrorCode = util.IOERR_GETTEMPPATH
|
|
_IOERR_BEGIN_ATOMIC _ErrorCode = util.IOERR_BEGIN_ATOMIC
|
|
_IOERR_COMMIT_ATOMIC _ErrorCode = util.IOERR_COMMIT_ATOMIC
|
|
_IOERR_ROLLBACK_ATOMIC _ErrorCode = util.IOERR_ROLLBACK_ATOMIC
|
|
_IOERR_DATA _ErrorCode = util.IOERR_DATA
|
|
_BUSY_SNAPSHOT _ErrorCode = util.BUSY_SNAPSHOT
|
|
_CANTOPEN_FULLPATH _ErrorCode = util.CANTOPEN_FULLPATH
|
|
_CANTOPEN_ISDIR _ErrorCode = util.CANTOPEN_ISDIR
|
|
_READONLY_CANTINIT _ErrorCode = util.READONLY_CANTINIT
|
|
_OK_SYMLINK _ErrorCode = util.OK_SYMLINK
|
|
)
|
|
|
|
// OpenFlag is a flag for the [VFS] Open method.
|
|
//
|
|
// https://sqlite.org/c3ref/c_open_autoproxy.html
|
|
type OpenFlag uint32
|
|
|
|
const (
|
|
OPEN_READONLY OpenFlag = 0x00000001 /* Ok for sqlite3_open_v2() */
|
|
OPEN_READWRITE OpenFlag = 0x00000002 /* Ok for sqlite3_open_v2() */
|
|
OPEN_CREATE OpenFlag = 0x00000004 /* Ok for sqlite3_open_v2() */
|
|
OPEN_DELETEONCLOSE OpenFlag = 0x00000008 /* VFS only */
|
|
OPEN_EXCLUSIVE OpenFlag = 0x00000010 /* VFS only */
|
|
OPEN_AUTOPROXY OpenFlag = 0x00000020 /* VFS only */
|
|
OPEN_URI OpenFlag = 0x00000040 /* Ok for sqlite3_open_v2() */
|
|
OPEN_MEMORY OpenFlag = 0x00000080 /* Ok for sqlite3_open_v2() */
|
|
OPEN_MAIN_DB OpenFlag = 0x00000100 /* VFS only */
|
|
OPEN_TEMP_DB OpenFlag = 0x00000200 /* VFS only */
|
|
OPEN_TRANSIENT_DB OpenFlag = 0x00000400 /* VFS only */
|
|
OPEN_MAIN_JOURNAL OpenFlag = 0x00000800 /* VFS only */
|
|
OPEN_TEMP_JOURNAL OpenFlag = 0x00001000 /* VFS only */
|
|
OPEN_SUBJOURNAL OpenFlag = 0x00002000 /* VFS only */
|
|
OPEN_SUPER_JOURNAL OpenFlag = 0x00004000 /* VFS only */
|
|
OPEN_NOMUTEX OpenFlag = 0x00008000 /* Ok for sqlite3_open_v2() */
|
|
OPEN_FULLMUTEX OpenFlag = 0x00010000 /* Ok for sqlite3_open_v2() */
|
|
OPEN_SHAREDCACHE OpenFlag = 0x00020000 /* Ok for sqlite3_open_v2() */
|
|
OPEN_PRIVATECACHE OpenFlag = 0x00040000 /* Ok for sqlite3_open_v2() */
|
|
OPEN_WAL OpenFlag = 0x00080000 /* VFS only */
|
|
OPEN_NOFOLLOW OpenFlag = 0x01000000 /* Ok for sqlite3_open_v2() */
|
|
)
|
|
|
|
// AccessFlag is a flag for the [VFS] Access method.
|
|
//
|
|
// https://sqlite.org/c3ref/c_access_exists.html
|
|
type AccessFlag uint32
|
|
|
|
const (
|
|
ACCESS_EXISTS AccessFlag = 0
|
|
ACCESS_READWRITE AccessFlag = 1 /* Used by PRAGMA temp_store_directory */
|
|
ACCESS_READ AccessFlag = 2 /* Unused */
|
|
)
|
|
|
|
// SyncFlag is a flag for the [File] Sync method.
|
|
//
|
|
// https://sqlite.org/c3ref/c_sync_dataonly.html
|
|
type SyncFlag uint32
|
|
|
|
const (
|
|
SYNC_NORMAL SyncFlag = 0x00002
|
|
SYNC_FULL SyncFlag = 0x00003
|
|
SYNC_DATAONLY SyncFlag = 0x00010
|
|
)
|
|
|
|
// LockLevel is a value used with [File] Lock and Unlock methods.
|
|
//
|
|
// https://sqlite.org/c3ref/c_lock_exclusive.html
|
|
type LockLevel uint32
|
|
|
|
const (
|
|
// No locks are held on the database.
|
|
// The database may be neither read nor written.
|
|
// Any internally cached data is considered suspect and subject to
|
|
// verification against the database file before being used.
|
|
// Other processes can read or write the database as their own locking
|
|
// states permit.
|
|
// This is the default state.
|
|
LOCK_NONE LockLevel = 0 /* xUnlock() only */
|
|
|
|
// The database may be read but not written.
|
|
// Any number of processes can hold SHARED locks at the same time,
|
|
// hence there can be many simultaneous readers.
|
|
// But no other thread or process is allowed to write to the database file
|
|
// while one or more SHARED locks are active.
|
|
LOCK_SHARED LockLevel = 1 /* xLock() or xUnlock() */
|
|
|
|
// A RESERVED lock means that the process is planning on writing to the
|
|
// database file at some point in the future but that it is currently just
|
|
// reading from the file.
|
|
// Only a single RESERVED lock may be active at one time,
|
|
// though multiple SHARED locks can coexist with a single RESERVED lock.
|
|
// RESERVED differs from PENDING in that new SHARED locks can be acquired
|
|
// while there is a RESERVED lock.
|
|
LOCK_RESERVED LockLevel = 2 /* xLock() only */
|
|
|
|
// A PENDING lock means that the process holding the lock wants to write to
|
|
// the database as soon as possible and is just waiting on all current
|
|
// SHARED locks to clear so that it can get an EXCLUSIVE lock.
|
|
// No new SHARED locks are permitted against the database if a PENDING lock
|
|
// is active, though existing SHARED locks are allowed to continue.
|
|
LOCK_PENDING LockLevel = 3 /* internal use only */
|
|
|
|
// An EXCLUSIVE lock is needed in order to write to the database file.
|
|
// Only one EXCLUSIVE lock is allowed on the file and no other locks of any
|
|
// kind are allowed to coexist with an EXCLUSIVE lock.
|
|
// In order to maximize concurrency, SQLite works to minimize the amount of
|
|
// time that EXCLUSIVE locks are held.
|
|
LOCK_EXCLUSIVE LockLevel = 4 /* xLock() only */
|
|
)
|
|
|
|
// DeviceCharacteristic is a flag retuned by the [File] DeviceCharacteristics method.
|
|
//
|
|
// https://sqlite.org/c3ref/c_iocap_atomic.html
|
|
type DeviceCharacteristic uint32
|
|
|
|
const (
|
|
IOCAP_ATOMIC DeviceCharacteristic = 0x00000001
|
|
IOCAP_ATOMIC512 DeviceCharacteristic = 0x00000002
|
|
IOCAP_ATOMIC1K DeviceCharacteristic = 0x00000004
|
|
IOCAP_ATOMIC2K DeviceCharacteristic = 0x00000008
|
|
IOCAP_ATOMIC4K DeviceCharacteristic = 0x00000010
|
|
IOCAP_ATOMIC8K DeviceCharacteristic = 0x00000020
|
|
IOCAP_ATOMIC16K DeviceCharacteristic = 0x00000040
|
|
IOCAP_ATOMIC32K DeviceCharacteristic = 0x00000080
|
|
IOCAP_ATOMIC64K DeviceCharacteristic = 0x00000100
|
|
IOCAP_SAFE_APPEND DeviceCharacteristic = 0x00000200
|
|
IOCAP_SEQUENTIAL DeviceCharacteristic = 0x00000400
|
|
IOCAP_UNDELETABLE_WHEN_OPEN DeviceCharacteristic = 0x00000800
|
|
IOCAP_POWERSAFE_OVERWRITE DeviceCharacteristic = 0x00001000
|
|
IOCAP_IMMUTABLE DeviceCharacteristic = 0x00002000
|
|
IOCAP_BATCH_ATOMIC DeviceCharacteristic = 0x00004000
|
|
IOCAP_SUBPAGE_READ DeviceCharacteristic = 0x00008000
|
|
)
|
|
|
|
// https://sqlite.org/c3ref/c_fcntl_begin_atomic_write.html
|
|
type _FcntlOpcode uint32
|
|
|
|
const (
|
|
_FCNTL_LOCKSTATE _FcntlOpcode = 1
|
|
_FCNTL_GET_LOCKPROXYFILE _FcntlOpcode = 2
|
|
_FCNTL_SET_LOCKPROXYFILE _FcntlOpcode = 3
|
|
_FCNTL_LAST_ERRNO _FcntlOpcode = 4
|
|
_FCNTL_SIZE_HINT _FcntlOpcode = 5
|
|
_FCNTL_CHUNK_SIZE _FcntlOpcode = 6
|
|
_FCNTL_FILE_POINTER _FcntlOpcode = 7
|
|
_FCNTL_SYNC_OMITTED _FcntlOpcode = 8
|
|
_FCNTL_WIN32_AV_RETRY _FcntlOpcode = 9
|
|
_FCNTL_PERSIST_WAL _FcntlOpcode = 10
|
|
_FCNTL_OVERWRITE _FcntlOpcode = 11
|
|
_FCNTL_VFSNAME _FcntlOpcode = 12
|
|
_FCNTL_POWERSAFE_OVERWRITE _FcntlOpcode = 13
|
|
_FCNTL_PRAGMA _FcntlOpcode = 14
|
|
_FCNTL_BUSYHANDLER _FcntlOpcode = 15
|
|
_FCNTL_TEMPFILENAME _FcntlOpcode = 16
|
|
_FCNTL_MMAP_SIZE _FcntlOpcode = 18
|
|
_FCNTL_TRACE _FcntlOpcode = 19
|
|
_FCNTL_HAS_MOVED _FcntlOpcode = 20
|
|
_FCNTL_SYNC _FcntlOpcode = 21
|
|
_FCNTL_COMMIT_PHASETWO _FcntlOpcode = 22
|
|
_FCNTL_WIN32_SET_HANDLE _FcntlOpcode = 23
|
|
_FCNTL_WAL_BLOCK _FcntlOpcode = 24
|
|
_FCNTL_ZIPVFS _FcntlOpcode = 25
|
|
_FCNTL_RBU _FcntlOpcode = 26
|
|
_FCNTL_VFS_POINTER _FcntlOpcode = 27
|
|
_FCNTL_JOURNAL_POINTER _FcntlOpcode = 28
|
|
_FCNTL_WIN32_GET_HANDLE _FcntlOpcode = 29
|
|
_FCNTL_PDB _FcntlOpcode = 30
|
|
_FCNTL_BEGIN_ATOMIC_WRITE _FcntlOpcode = 31
|
|
_FCNTL_COMMIT_ATOMIC_WRITE _FcntlOpcode = 32
|
|
_FCNTL_ROLLBACK_ATOMIC_WRITE _FcntlOpcode = 33
|
|
_FCNTL_LOCK_TIMEOUT _FcntlOpcode = 34
|
|
_FCNTL_DATA_VERSION _FcntlOpcode = 35
|
|
_FCNTL_SIZE_LIMIT _FcntlOpcode = 36
|
|
_FCNTL_CKPT_DONE _FcntlOpcode = 37
|
|
_FCNTL_RESERVE_BYTES _FcntlOpcode = 38
|
|
_FCNTL_CKPT_START _FcntlOpcode = 39
|
|
_FCNTL_EXTERNAL_READER _FcntlOpcode = 40
|
|
_FCNTL_CKSM_FILE _FcntlOpcode = 41
|
|
_FCNTL_RESET_CACHE _FcntlOpcode = 42
|
|
)
|
|
|
|
// https://sqlite.org/c3ref/c_shm_exclusive.html
|
|
type _ShmFlag uint32
|
|
|
|
const (
|
|
_SHM_UNLOCK _ShmFlag = 1
|
|
_SHM_LOCK _ShmFlag = 2
|
|
_SHM_SHARED _ShmFlag = 4
|
|
_SHM_EXCLUSIVE _ShmFlag = 8
|
|
|
|
_SHM_NLOCK = 8
|
|
_SHM_BASE = 120
|
|
_SHM_DMS = _SHM_BASE + _SHM_NLOCK
|
|
)
|