Database.LevelDB.C

Documentation

data LevelDB

data LCache

data LComparator

data LIterator

data LLogger

data LOptions

data LReadOptions

data LSnapshot

data LWriteBatch

data LWriteOptions

data LFilterPolicy

type LevelDBPtr = Ptr LevelDB

type CachePtr = Ptr LCache

type ComparatorPtr = Ptr LComparator

type IteratorPtr = Ptr LIterator

type LoggerPtr = Ptr LLogger

type OptionsPtr = Ptr LOptions

type ReadOptionsPtr = Ptr LReadOptions

type SnapshotPtr = Ptr LSnapshot

type WriteBatchPtr = Ptr LWriteBatch

type WriteOptionsPtr = Ptr LWriteOptions

type FilterPolicyPtr = Ptr LFilterPolicy

type DBName = CString

type ErrPtr = Ptr CString

type Key = CString

type Val = CString

newtype CompressionOpt

Constructors

CompressionOpt

Fields

compressionOpt :: CInt

Instances

Eq CompressionOpt

Show CompressionOpt

noCompression :: CompressionOpt

snappyCompression :: CompressionOpt

c_leveldb_open :: OptionsPtr -> DBName -> ErrPtr -> IO LevelDBPtr

c_leveldb_close :: LevelDBPtr -> IO ()

c_leveldb_put :: LevelDBPtr -> WriteOptionsPtr -> Key -> CSize -> Val -> CSize -> ErrPtr -> IO ()

c_leveldb_delete :: LevelDBPtr -> WriteOptionsPtr -> Key -> CSize -> ErrPtr -> IO ()

c_leveldb_write :: LevelDBPtr -> WriteOptionsPtr -> WriteBatchPtr -> ErrPtr -> IO ()

c_leveldb_get

Arguments

:: LevelDBPtr

-> ReadOptionsPtr

-> Key

-> CSize

-> Ptr CSize

value length

-> ErrPtr

-> IO CString

Returns NULL if not found. A malloc()ed array otherwise. Stores the length of the array in *vallen.

c_leveldb_create_snapshot :: LevelDBPtr -> IO SnapshotPtr

c_leveldb_release_snapshot :: LevelDBPtr -> SnapshotPtr -> IO ()

c_leveldb_property_value :: LevelDBPtr -> CString -> IO CString

Returns NULL if property name is unknown. Else returns a pointer to a malloc()-ed null-terminated value.

c_leveldb_approximate_sizes

Arguments

:: LevelDBPtr

-> CInt

num ranges

-> Ptr CString

-> Ptr CSize

range start keys (array)

-> Ptr CString

-> Ptr CSize

range limit keys (array)

-> Ptr Word64

array of approx. sizes of ranges

-> IO ()

c_leveldb_destroy_db :: OptionsPtr -> DBName -> ErrPtr -> IO ()

c_leveldb_repair_db :: OptionsPtr -> DBName -> ErrPtr -> IO ()

c_leveldb_create_iterator :: LevelDBPtr -> ReadOptionsPtr -> IO IteratorPtr

c_leveldb_iter_destroy :: IteratorPtr -> IO ()

c_leveldb_iter_valid :: IteratorPtr -> IO CUChar

c_leveldb_iter_seek_to_first :: IteratorPtr -> IO ()

c_leveldb_iter_seek_to_last :: IteratorPtr -> IO ()

c_leveldb_iter_seek :: IteratorPtr -> Key -> CSize -> IO ()

c_leveldb_iter_next :: IteratorPtr -> IO ()

c_leveldb_iter_prev :: IteratorPtr -> IO ()

c_leveldb_iter_key :: IteratorPtr -> Ptr CSize -> IO Key

c_leveldb_iter_value :: IteratorPtr -> Ptr CSize -> IO Val

c_leveldb_iter_get_error :: IteratorPtr -> ErrPtr -> IO ()

c_leveldb_writebatch_create :: IO WriteBatchPtr

c_leveldb_writebatch_destroy :: WriteBatchPtr -> IO ()

c_leveldb_writebatch_clear :: WriteBatchPtr -> IO ()

c_leveldb_writebatch_put :: WriteBatchPtr -> Key -> CSize -> Val -> CSize -> IO ()

c_leveldb_writebatch_delete :: WriteBatchPtr -> Key -> CSize -> IO ()

c_leveldb_writebatch_iterate

Arguments

:: WriteBatchPtr

-> Ptr ()

state

-> FunPtr (Ptr () -> Key -> CSize -> Val -> CSize)

put

-> FunPtr (Ptr () -> Key -> CSize)

delete

-> IO ()

c_leveldb_options_create :: IO OptionsPtr

c_leveldb_options_destroy :: OptionsPtr -> IO ()

c_leveldb_options_set_comparator :: OptionsPtr -> ComparatorPtr -> IO ()

c_leveldb_options_set_filter_policy :: OptionsPtr -> FilterPolicyPtr -> IO ()

c_leveldb_options_set_create_if_missing :: OptionsPtr -> CUChar -> IO ()

c_leveldb_options_set_error_if_exists :: OptionsPtr -> CUChar -> IO ()

c_leveldb_options_set_paranoid_checks :: OptionsPtr -> CUChar -> IO ()

c_leveldb_options_set_info_log :: OptionsPtr -> LoggerPtr -> IO ()

c_leveldb_options_set_write_buffer_size :: OptionsPtr -> CSize -> IO ()

c_leveldb_options_set_max_open_files :: OptionsPtr -> CInt -> IO ()

c_leveldb_options_set_block_size :: OptionsPtr -> CSize -> IO ()

c_leveldb_options_set_block_restart_interval :: OptionsPtr -> CInt -> IO ()

c_leveldb_options_set_compression :: OptionsPtr -> CompressionOpt -> IO ()

c_leveldb_options_set_cache :: OptionsPtr -> CachePtr -> IO ()

type StatePtr = Ptr ()

type Destructor = StatePtr -> ()

type CompareFun = StatePtr -> CString -> CSize -> CString -> CSize -> IO CInt

type NameFun = StatePtr -> CString

mkCmp :: CompareFun -> IO (FunPtr CompareFun)

Make a FunPtr to a user-defined comparator function

mkDest :: Destructor -> IO (FunPtr Destructor)

Make a destructor FunPtr

mkName :: NameFun -> IO (FunPtr NameFun)

Make a name FunPtr

c_leveldb_comparator_create :: StatePtr -> FunPtr Destructor -> FunPtr CompareFun -> FunPtr NameFun -> IO ComparatorPtr

c_leveldb_comparator_destroy :: ComparatorPtr -> IO ()

type CreateFilterFun

Arguments

 = StatePtr

-> Ptr CString

key array

-> Ptr CSize

key length array

-> CInt

num keys

-> Ptr CSize

filter length

-> IO CString

the filter

type KeyMayMatchFun

Arguments

 = StatePtr

-> CString

key

-> CSize

key length

-> CString

filter

-> CSize

filter length

-> IO CUChar

whether key is in filter

mkCF :: CreateFilterFun -> IO (FunPtr CreateFilterFun)

Make a FunPtr to a user-defined create_filter function

mkKMM :: KeyMayMatchFun -> IO (FunPtr KeyMayMatchFun)

Make a FunPtr to a user-defined key_may_match function

c_leveldb_filterpolicy_create :: StatePtr -> FunPtr Destructor -> FunPtr CreateFilterFun -> FunPtr KeyMayMatchFun -> FunPtr NameFun -> IO FilterPolicyPtr

c_leveldb_filterpolicy_destroy :: FilterPolicyPtr -> IO ()

c_leveldb_filterpolicy_create_bloom :: CInt -> IO FilterPolicyPtr

c_leveldb_readoptions_create :: IO ReadOptionsPtr

c_leveldb_readoptions_destroy :: ReadOptionsPtr -> IO ()

c_leveldb_readoptions_set_verify_checksums :: ReadOptionsPtr -> CUChar -> IO ()

c_leveldb_readoptions_set_fill_cache :: ReadOptionsPtr -> CUChar -> IO ()

c_leveldb_readoptions_set_snapshot :: ReadOptionsPtr -> SnapshotPtr -> IO ()

c_leveldb_writeoptions_create :: IO WriteOptionsPtr

c_leveldb_writeoptions_destroy :: WriteOptionsPtr -> IO ()

c_leveldb_writeoptions_set_sync :: WriteOptionsPtr -> CUChar -> IO ()

c_leveldb_cache_create_lru :: CSize -> IO CachePtr

c_leveldb_cache_destroy :: CachePtr -> IO ()

c_leveldb_major_version :: IO CInt

c_leveldb_minor_version :: IO CInt