{-# LANGUAGE TypeApplications #-}


-- | Copyright  : Will Thompson, Iñaki García Etxebarria and Jonas Platte
-- License    : LGPL-2.1
-- Maintainer : Iñaki García Etxebarria
-- 
-- t'GI.Gio.Interfaces.Seekable.Seekable' is implemented by streams (implementations of
-- t'GI.Gio.Objects.InputStream.InputStream' or t'GI.Gio.Objects.OutputStream.OutputStream') that support seeking.
-- 
-- Seekable streams largely fall into two categories: resizable and
-- fixed-size.
-- 
-- t'GI.Gio.Interfaces.Seekable.Seekable' on fixed-sized streams is approximately the same as POSIX
-- @/lseek()/@ on a block device (for example: attempting to seek past the
-- end of the device is an error).  Fixed streams typically cannot be
-- truncated.
-- 
-- t'GI.Gio.Interfaces.Seekable.Seekable' on resizable streams is approximately the same as POSIX
-- @/lseek()/@ on a normal file.  Seeking past the end and writing data will
-- usually cause the stream to resize by introducing zero bytes.

#if (MIN_VERSION_haskell_gi_overloading(1,0,0) && !defined(__HADDOCK_VERSION__))
#define ENABLE_OVERLOADING
#endif

module GI.Gio.Interfaces.Seekable
    ( 

-- * Exported types
    Seekable(..)                            ,
    noSeekable                              ,
    IsSeekable                              ,
    toSeekable                              ,


 -- * Methods
-- ** Overloaded methods #method:Overloaded methods#

#if defined(ENABLE_OVERLOADING)
    ResolveSeekableMethod                   ,
#endif


-- ** canSeek #method:canSeek#

#if defined(ENABLE_OVERLOADING)
    SeekableCanSeekMethodInfo               ,
#endif
    seekableCanSeek                         ,


-- ** canTruncate #method:canTruncate#

#if defined(ENABLE_OVERLOADING)
    SeekableCanTruncateMethodInfo           ,
#endif
    seekableCanTruncate                     ,


-- ** seek #method:seek#

#if defined(ENABLE_OVERLOADING)
    SeekableSeekMethodInfo                  ,
#endif
    seekableSeek                            ,


-- ** tell #method:tell#

#if defined(ENABLE_OVERLOADING)
    SeekableTellMethodInfo                  ,
#endif
    seekableTell                            ,


-- ** truncate #method:truncate#

#if defined(ENABLE_OVERLOADING)
    SeekableTruncateMethodInfo              ,
#endif
    seekableTruncate                        ,




    ) where

import Data.GI.Base.ShortPrelude
import qualified Data.GI.Base.ShortPrelude as SP
import qualified Data.GI.Base.Overloading as O
import qualified Prelude as P

import qualified Data.GI.Base.Attributes as GI.Attributes
import qualified Data.GI.Base.ManagedPtr as B.ManagedPtr
import qualified Data.GI.Base.GClosure as B.GClosure
import qualified Data.GI.Base.GError as B.GError
import qualified Data.GI.Base.GVariant as B.GVariant
import qualified Data.GI.Base.GValue as B.GValue
import qualified Data.GI.Base.GParamSpec as B.GParamSpec
import qualified Data.GI.Base.CallStack as B.CallStack
import qualified Data.GI.Base.Properties as B.Properties
import qualified Data.GI.Base.Signals as B.Signals
import qualified Data.Text as T
import qualified Data.ByteString.Char8 as B
import qualified Data.Map as Map
import qualified Foreign.Ptr as FP
import qualified GHC.OverloadedLabels as OL

import qualified GI.GLib.Enums as GLib.Enums
import qualified GI.GObject.Objects.Object as GObject.Object
import {-# SOURCE #-} qualified GI.Gio.Objects.Cancellable as Gio.Cancellable

-- interface Seekable 
-- | Memory-managed wrapper type.
newtype Seekable = Seekable (ManagedPtr Seekable)
    deriving (Seekable -> Seekable -> Bool
(Seekable -> Seekable -> Bool)
-> (Seekable -> Seekable -> Bool) -> Eq Seekable
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Seekable -> Seekable -> Bool
$c/= :: Seekable -> Seekable -> Bool
== :: Seekable -> Seekable -> Bool
$c== :: Seekable -> Seekable -> Bool
Eq)
-- | A convenience alias for `Nothing` :: `Maybe` `Seekable`.
noSeekable :: Maybe Seekable
noSeekable :: Maybe Seekable
noSeekable = Maybe Seekable
forall a. Maybe a
Nothing

#if defined(ENABLE_OVERLOADING)
type instance O.SignalList Seekable = SeekableSignalList
type SeekableSignalList = ('[ '("notify", GObject.Object.ObjectNotifySignalInfo)] :: [(Symbol, *)])

#endif

foreign import ccall "g_seekable_get_type"
    c_g_seekable_get_type :: IO GType

instance GObject Seekable where
    gobjectType :: IO GType
gobjectType = IO GType
c_g_seekable_get_type
    

-- | Convert 'Seekable' to and from 'Data.GI.Base.GValue.GValue' with 'Data.GI.Base.GValue.toGValue' and 'Data.GI.Base.GValue.fromGValue'.
instance B.GValue.IsGValue Seekable where
    toGValue :: Seekable -> IO GValue
toGValue o :: Seekable
o = do
        GType
gtype <- IO GType
c_g_seekable_get_type
        Seekable -> (Ptr Seekable -> IO GValue) -> IO GValue
forall a c.
(HasCallStack, ManagedPtrNewtype a) =>
a -> (Ptr a -> IO c) -> IO c
B.ManagedPtr.withManagedPtr Seekable
o (GType
-> (GValue -> Ptr Seekable -> IO ()) -> Ptr Seekable -> IO GValue
forall a. GType -> (GValue -> a -> IO ()) -> a -> IO GValue
B.GValue.buildGValue GType
gtype GValue -> Ptr Seekable -> IO ()
forall a. GObject a => GValue -> Ptr a -> IO ()
B.GValue.set_object)
        
    fromGValue :: GValue -> IO Seekable
fromGValue gv :: GValue
gv = do
        Ptr Seekable
ptr <- GValue -> IO (Ptr Seekable)
forall b. GObject b => GValue -> IO (Ptr b)
B.GValue.get_object GValue
gv :: IO (Ptr Seekable)
        (ManagedPtr Seekable -> Seekable) -> Ptr Seekable -> IO Seekable
forall a b.
(HasCallStack, GObject a, GObject b) =>
(ManagedPtr a -> a) -> Ptr b -> IO a
B.ManagedPtr.newObject ManagedPtr Seekable -> Seekable
Seekable Ptr Seekable
ptr
        
    

-- | Type class for types which can be safely cast to `Seekable`, for instance with `toSeekable`.
class (GObject o, O.IsDescendantOf Seekable o) => IsSeekable o
instance (GObject o, O.IsDescendantOf Seekable o) => IsSeekable o

instance O.HasParentTypes Seekable
type instance O.ParentTypes Seekable = '[GObject.Object.Object]

-- | Cast to `Seekable`, for types for which this is known to be safe. For general casts, use `Data.GI.Base.ManagedPtr.castTo`.
toSeekable :: (MonadIO m, IsSeekable o) => o -> m Seekable
toSeekable :: o -> m Seekable
toSeekable = IO Seekable -> m Seekable
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Seekable -> m Seekable)
-> (o -> IO Seekable) -> o -> m Seekable
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (ManagedPtr Seekable -> Seekable) -> o -> IO Seekable
forall o o'.
(HasCallStack, GObject o, GObject o') =>
(ManagedPtr o' -> o') -> o -> IO o'
unsafeCastTo ManagedPtr Seekable -> Seekable
Seekable

#if defined(ENABLE_OVERLOADING)
instance O.HasAttributeList Seekable
type instance O.AttributeList Seekable = SeekableAttributeList
type SeekableAttributeList = ('[ ] :: [(Symbol, *)])
#endif

#if defined(ENABLE_OVERLOADING)
#endif

#if defined(ENABLE_OVERLOADING)
type family ResolveSeekableMethod (t :: Symbol) (o :: *) :: * where
    ResolveSeekableMethod "bindProperty" o = GObject.Object.ObjectBindPropertyMethodInfo
    ResolveSeekableMethod "bindPropertyFull" o = GObject.Object.ObjectBindPropertyFullMethodInfo
    ResolveSeekableMethod "canSeek" o = SeekableCanSeekMethodInfo
    ResolveSeekableMethod "canTruncate" o = SeekableCanTruncateMethodInfo
    ResolveSeekableMethod "forceFloating" o = GObject.Object.ObjectForceFloatingMethodInfo
    ResolveSeekableMethod "freezeNotify" o = GObject.Object.ObjectFreezeNotifyMethodInfo
    ResolveSeekableMethod "getv" o = GObject.Object.ObjectGetvMethodInfo
    ResolveSeekableMethod "isFloating" o = GObject.Object.ObjectIsFloatingMethodInfo
    ResolveSeekableMethod "notify" o = GObject.Object.ObjectNotifyMethodInfo
    ResolveSeekableMethod "notifyByPspec" o = GObject.Object.ObjectNotifyByPspecMethodInfo
    ResolveSeekableMethod "ref" o = GObject.Object.ObjectRefMethodInfo
    ResolveSeekableMethod "refSink" o = GObject.Object.ObjectRefSinkMethodInfo
    ResolveSeekableMethod "runDispose" o = GObject.Object.ObjectRunDisposeMethodInfo
    ResolveSeekableMethod "seek" o = SeekableSeekMethodInfo
    ResolveSeekableMethod "stealData" o = GObject.Object.ObjectStealDataMethodInfo
    ResolveSeekableMethod "stealQdata" o = GObject.Object.ObjectStealQdataMethodInfo
    ResolveSeekableMethod "tell" o = SeekableTellMethodInfo
    ResolveSeekableMethod "thawNotify" o = GObject.Object.ObjectThawNotifyMethodInfo
    ResolveSeekableMethod "truncate" o = SeekableTruncateMethodInfo
    ResolveSeekableMethod "unref" o = GObject.Object.ObjectUnrefMethodInfo
    ResolveSeekableMethod "watchClosure" o = GObject.Object.ObjectWatchClosureMethodInfo
    ResolveSeekableMethod "getData" o = GObject.Object.ObjectGetDataMethodInfo
    ResolveSeekableMethod "getProperty" o = GObject.Object.ObjectGetPropertyMethodInfo
    ResolveSeekableMethod "getQdata" o = GObject.Object.ObjectGetQdataMethodInfo
    ResolveSeekableMethod "setData" o = GObject.Object.ObjectSetDataMethodInfo
    ResolveSeekableMethod "setDataFull" o = GObject.Object.ObjectSetDataFullMethodInfo
    ResolveSeekableMethod "setProperty" o = GObject.Object.ObjectSetPropertyMethodInfo
    ResolveSeekableMethod l o = O.MethodResolutionFailed l o

instance (info ~ ResolveSeekableMethod t Seekable, O.MethodInfo info Seekable p) => OL.IsLabel t (Seekable -> p) where
#if MIN_VERSION_base(4,10,0)
    fromLabel = O.overloadedMethod @info
#else
    fromLabel _ = O.overloadedMethod @info
#endif

#endif

-- method Seekable::can_seek
-- method type : OrdinaryMethod
-- Args: [ Arg
--           { argCName = "seekable"
--           , argType =
--               TInterface Name { namespace = "Gio" , name = "Seekable" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "a #GSeekable." , sinceVersion = Nothing }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       ]
-- Lengths: []
-- returnType: Just (TBasicType TBoolean)
-- throws : False
-- Skip return : False

foreign import ccall "g_seekable_can_seek" g_seekable_can_seek :: 
    Ptr Seekable ->                         -- seekable : TInterface (Name {namespace = "Gio", name = "Seekable"})
    IO CInt

-- | Tests if the stream supports the t'GI.Gio.Structs.SeekableIface.SeekableIface'.
seekableCanSeek ::
    (B.CallStack.HasCallStack, MonadIO m, IsSeekable a) =>
    a
    -- ^ /@seekable@/: a t'GI.Gio.Interfaces.Seekable.Seekable'.
    -> m Bool
    -- ^ __Returns:__ 'P.True' if /@seekable@/ can be seeked. 'P.False' otherwise.
seekableCanSeek :: a -> m Bool
seekableCanSeek seekable :: a
seekable = IO Bool -> m Bool
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Bool -> m Bool) -> IO Bool -> m Bool
forall a b. (a -> b) -> a -> b
$ do
    Ptr Seekable
seekable' <- a -> IO (Ptr Seekable)
forall a b. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr b)
unsafeManagedPtrCastPtr a
seekable
    CInt
result <- Ptr Seekable -> IO CInt
g_seekable_can_seek Ptr Seekable
seekable'
    let result' :: Bool
result' = (CInt -> CInt -> Bool
forall a. Eq a => a -> a -> Bool
/= 0) CInt
result
    a -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr a
seekable
    Bool -> IO Bool
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
result'

#if defined(ENABLE_OVERLOADING)
data SeekableCanSeekMethodInfo
instance (signature ~ (m Bool), MonadIO m, IsSeekable a) => O.MethodInfo SeekableCanSeekMethodInfo a signature where
    overloadedMethod = seekableCanSeek

#endif

-- method Seekable::can_truncate
-- method type : OrdinaryMethod
-- Args: [ Arg
--           { argCName = "seekable"
--           , argType =
--               TInterface Name { namespace = "Gio" , name = "Seekable" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "a #GSeekable." , sinceVersion = Nothing }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       ]
-- Lengths: []
-- returnType: Just (TBasicType TBoolean)
-- throws : False
-- Skip return : False

foreign import ccall "g_seekable_can_truncate" g_seekable_can_truncate :: 
    Ptr Seekable ->                         -- seekable : TInterface (Name {namespace = "Gio", name = "Seekable"})
    IO CInt

-- | Tests if the length of the stream can be adjusted with
-- 'GI.Gio.Interfaces.Seekable.seekableTruncate'.
seekableCanTruncate ::
    (B.CallStack.HasCallStack, MonadIO m, IsSeekable a) =>
    a
    -- ^ /@seekable@/: a t'GI.Gio.Interfaces.Seekable.Seekable'.
    -> m Bool
    -- ^ __Returns:__ 'P.True' if the stream can be truncated, 'P.False' otherwise.
seekableCanTruncate :: a -> m Bool
seekableCanTruncate seekable :: a
seekable = IO Bool -> m Bool
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Bool -> m Bool) -> IO Bool -> m Bool
forall a b. (a -> b) -> a -> b
$ do
    Ptr Seekable
seekable' <- a -> IO (Ptr Seekable)
forall a b. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr b)
unsafeManagedPtrCastPtr a
seekable
    CInt
result <- Ptr Seekable -> IO CInt
g_seekable_can_truncate Ptr Seekable
seekable'
    let result' :: Bool
result' = (CInt -> CInt -> Bool
forall a. Eq a => a -> a -> Bool
/= 0) CInt
result
    a -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr a
seekable
    Bool -> IO Bool
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
result'

#if defined(ENABLE_OVERLOADING)
data SeekableCanTruncateMethodInfo
instance (signature ~ (m Bool), MonadIO m, IsSeekable a) => O.MethodInfo SeekableCanTruncateMethodInfo a signature where
    overloadedMethod = seekableCanTruncate

#endif

-- method Seekable::seek
-- method type : OrdinaryMethod
-- Args: [ Arg
--           { argCName = "seekable"
--           , argType =
--               TInterface Name { namespace = "Gio" , name = "Seekable" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "a #GSeekable." , sinceVersion = Nothing }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "offset"
--           , argType = TBasicType TInt64
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "a #goffset." , sinceVersion = Nothing }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "type"
--           , argType =
--               TInterface Name { namespace = "GLib" , name = "SeekType" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "a #GSeekType." , sinceVersion = Nothing }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "cancellable"
--           , argType =
--               TInterface Name { namespace = "Gio" , name = "Cancellable" }
--           , direction = DirectionIn
--           , mayBeNull = True
--           , argDoc =
--               Documentation
--                 { rawDocText =
--                     Just "optional #GCancellable object, %NULL to ignore."
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       ]
-- Lengths: []
-- returnType: Just (TBasicType TBoolean)
-- throws : True
-- Skip return : False

foreign import ccall "g_seekable_seek" g_seekable_seek :: 
    Ptr Seekable ->                         -- seekable : TInterface (Name {namespace = "Gio", name = "Seekable"})
    Int64 ->                                -- offset : TBasicType TInt64
    CUInt ->                                -- type : TInterface (Name {namespace = "GLib", name = "SeekType"})
    Ptr Gio.Cancellable.Cancellable ->      -- cancellable : TInterface (Name {namespace = "Gio", name = "Cancellable"})
    Ptr (Ptr GError) ->                     -- error
    IO CInt

-- | Seeks in the stream by the given /@offset@/, modified by /@type@/.
-- 
-- Attempting to seek past the end of the stream will have different
-- results depending on if the stream is fixed-sized or resizable.  If
-- the stream is resizable then seeking past the end and then writing
-- will result in zeros filling the empty space.  Seeking past the end
-- of a resizable stream and reading will result in EOF.  Seeking past
-- the end of a fixed-sized stream will fail.
-- 
-- Any operation that would result in a negative offset will fail.
-- 
-- If /@cancellable@/ is not 'P.Nothing', then the operation can be cancelled by
-- triggering the cancellable object from another thread. If the operation
-- was cancelled, the error 'GI.Gio.Enums.IOErrorEnumCancelled' will be returned.
seekableSeek ::
    (B.CallStack.HasCallStack, MonadIO m, IsSeekable a, Gio.Cancellable.IsCancellable b) =>
    a
    -- ^ /@seekable@/: a t'GI.Gio.Interfaces.Seekable.Seekable'.
    -> Int64
    -- ^ /@offset@/: a @/goffset/@.
    -> GLib.Enums.SeekType
    -- ^ /@type@/: a t'GI.GLib.Enums.SeekType'.
    -> Maybe (b)
    -- ^ /@cancellable@/: optional t'GI.Gio.Objects.Cancellable.Cancellable' object, 'P.Nothing' to ignore.
    -> m ()
    -- ^ /(Can throw 'Data.GI.Base.GError.GError')/
seekableSeek :: a -> Int64 -> SeekType -> Maybe b -> m ()
seekableSeek seekable :: a
seekable offset :: Int64
offset type_ :: SeekType
type_ cancellable :: Maybe b
cancellable = IO () -> m ()
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> m ()) -> IO () -> m ()
forall a b. (a -> b) -> a -> b
$ do
    Ptr Seekable
seekable' <- a -> IO (Ptr Seekable)
forall a b. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr b)
unsafeManagedPtrCastPtr a
seekable
    let type_' :: CUInt
type_' = (Int -> CUInt
forall a b. (Integral a, Num b) => a -> b
fromIntegral (Int -> CUInt) -> (SeekType -> Int) -> SeekType -> CUInt
forall b c a. (b -> c) -> (a -> b) -> a -> c
. SeekType -> Int
forall a. Enum a => a -> Int
fromEnum) SeekType
type_
    Ptr Cancellable
maybeCancellable <- case Maybe b
cancellable of
        Nothing -> Ptr Cancellable -> IO (Ptr Cancellable)
forall (m :: * -> *) a. Monad m => a -> m a
return Ptr Cancellable
forall a. Ptr a
nullPtr
        Just jCancellable :: b
jCancellable -> do
            Ptr Cancellable
jCancellable' <- b -> IO (Ptr Cancellable)
forall a b. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr b)
unsafeManagedPtrCastPtr b
jCancellable
            Ptr Cancellable -> IO (Ptr Cancellable)
forall (m :: * -> *) a. Monad m => a -> m a
return Ptr Cancellable
jCancellable'
    IO () -> IO () -> IO ()
forall a b. IO a -> IO b -> IO a
onException (do
        CInt
_ <- (Ptr (Ptr GError) -> IO CInt) -> IO CInt
forall a. (Ptr (Ptr GError) -> IO a) -> IO a
propagateGError ((Ptr (Ptr GError) -> IO CInt) -> IO CInt)
-> (Ptr (Ptr GError) -> IO CInt) -> IO CInt
forall a b. (a -> b) -> a -> b
$ Ptr Seekable
-> Int64 -> CUInt -> Ptr Cancellable -> Ptr (Ptr GError) -> IO CInt
g_seekable_seek Ptr Seekable
seekable' Int64
offset CUInt
type_' Ptr Cancellable
maybeCancellable
        a -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr a
seekable
        Maybe b -> (b -> IO ()) -> IO ()
forall (m :: * -> *) a. Monad m => Maybe a -> (a -> m ()) -> m ()
whenJust Maybe b
cancellable b -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr
        () -> IO ()
forall (m :: * -> *) a. Monad m => a -> m a
return ()
     ) (do
        () -> IO ()
forall (m :: * -> *) a. Monad m => a -> m a
return ()
     )

#if defined(ENABLE_OVERLOADING)
data SeekableSeekMethodInfo
instance (signature ~ (Int64 -> GLib.Enums.SeekType -> Maybe (b) -> m ()), MonadIO m, IsSeekable a, Gio.Cancellable.IsCancellable b) => O.MethodInfo SeekableSeekMethodInfo a signature where
    overloadedMethod = seekableSeek

#endif

-- method Seekable::tell
-- method type : OrdinaryMethod
-- Args: [ Arg
--           { argCName = "seekable"
--           , argType =
--               TInterface Name { namespace = "Gio" , name = "Seekable" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "a #GSeekable." , sinceVersion = Nothing }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       ]
-- Lengths: []
-- returnType: Just (TBasicType TInt64)
-- throws : False
-- Skip return : False

foreign import ccall "g_seekable_tell" g_seekable_tell :: 
    Ptr Seekable ->                         -- seekable : TInterface (Name {namespace = "Gio", name = "Seekable"})
    IO Int64

-- | Tells the current position within the stream.
seekableTell ::
    (B.CallStack.HasCallStack, MonadIO m, IsSeekable a) =>
    a
    -- ^ /@seekable@/: a t'GI.Gio.Interfaces.Seekable.Seekable'.
    -> m Int64
    -- ^ __Returns:__ the offset from the beginning of the buffer.
seekableTell :: a -> m Int64
seekableTell seekable :: a
seekable = IO Int64 -> m Int64
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Int64 -> m Int64) -> IO Int64 -> m Int64
forall a b. (a -> b) -> a -> b
$ do
    Ptr Seekable
seekable' <- a -> IO (Ptr Seekable)
forall a b. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr b)
unsafeManagedPtrCastPtr a
seekable
    Int64
result <- Ptr Seekable -> IO Int64
g_seekable_tell Ptr Seekable
seekable'
    a -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr a
seekable
    Int64 -> IO Int64
forall (m :: * -> *) a. Monad m => a -> m a
return Int64
result

#if defined(ENABLE_OVERLOADING)
data SeekableTellMethodInfo
instance (signature ~ (m Int64), MonadIO m, IsSeekable a) => O.MethodInfo SeekableTellMethodInfo a signature where
    overloadedMethod = seekableTell

#endif

-- method Seekable::truncate
-- method type : OrdinaryMethod
-- Args: [ Arg
--           { argCName = "seekable"
--           , argType =
--               TInterface Name { namespace = "Gio" , name = "Seekable" }
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "a #GSeekable." , sinceVersion = Nothing }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "offset"
--           , argType = TBasicType TInt64
--           , direction = DirectionIn
--           , mayBeNull = False
--           , argDoc =
--               Documentation
--                 { rawDocText = Just "new length for @seekable, in bytes."
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       , Arg
--           { argCName = "cancellable"
--           , argType =
--               TInterface Name { namespace = "Gio" , name = "Cancellable" }
--           , direction = DirectionIn
--           , mayBeNull = True
--           , argDoc =
--               Documentation
--                 { rawDocText =
--                     Just "optional #GCancellable object, %NULL to ignore."
--                 , sinceVersion = Nothing
--                 }
--           , argScope = ScopeTypeInvalid
--           , argClosure = -1
--           , argDestroy = -1
--           , argCallerAllocates = False
--           , transfer = TransferNothing
--           }
--       ]
-- Lengths: []
-- returnType: Just (TBasicType TBoolean)
-- throws : True
-- Skip return : False

foreign import ccall "g_seekable_truncate" g_seekable_truncate :: 
    Ptr Seekable ->                         -- seekable : TInterface (Name {namespace = "Gio", name = "Seekable"})
    Int64 ->                                -- offset : TBasicType TInt64
    Ptr Gio.Cancellable.Cancellable ->      -- cancellable : TInterface (Name {namespace = "Gio", name = "Cancellable"})
    Ptr (Ptr GError) ->                     -- error
    IO CInt

-- | Sets the length of the stream to /@offset@/. If the stream was previously
-- larger than /@offset@/, the extra data is discarded. If the stream was
-- previouly shorter than /@offset@/, it is extended with NUL (\'\\0\') bytes.
-- 
-- If /@cancellable@/ is not 'P.Nothing', then the operation can be cancelled by
-- triggering the cancellable object from another thread. If the operation
-- was cancelled, the error 'GI.Gio.Enums.IOErrorEnumCancelled' will be returned. If an
-- operation was partially finished when the operation was cancelled the
-- partial result will be returned, without an error.
seekableTruncate ::
    (B.CallStack.HasCallStack, MonadIO m, IsSeekable a, Gio.Cancellable.IsCancellable b) =>
    a
    -- ^ /@seekable@/: a t'GI.Gio.Interfaces.Seekable.Seekable'.
    -> Int64
    -- ^ /@offset@/: new length for /@seekable@/, in bytes.
    -> Maybe (b)
    -- ^ /@cancellable@/: optional t'GI.Gio.Objects.Cancellable.Cancellable' object, 'P.Nothing' to ignore.
    -> m ()
    -- ^ /(Can throw 'Data.GI.Base.GError.GError')/
seekableTruncate :: a -> Int64 -> Maybe b -> m ()
seekableTruncate seekable :: a
seekable offset :: Int64
offset cancellable :: Maybe b
cancellable = IO () -> m ()
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> m ()) -> IO () -> m ()
forall a b. (a -> b) -> a -> b
$ do
    Ptr Seekable
seekable' <- a -> IO (Ptr Seekable)
forall a b. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr b)
unsafeManagedPtrCastPtr a
seekable
    Ptr Cancellable
maybeCancellable <- case Maybe b
cancellable of
        Nothing -> Ptr Cancellable -> IO (Ptr Cancellable)
forall (m :: * -> *) a. Monad m => a -> m a
return Ptr Cancellable
forall a. Ptr a
nullPtr
        Just jCancellable :: b
jCancellable -> do
            Ptr Cancellable
jCancellable' <- b -> IO (Ptr Cancellable)
forall a b. (HasCallStack, ManagedPtrNewtype a) => a -> IO (Ptr b)
unsafeManagedPtrCastPtr b
jCancellable
            Ptr Cancellable -> IO (Ptr Cancellable)
forall (m :: * -> *) a. Monad m => a -> m a
return Ptr Cancellable
jCancellable'
    IO () -> IO () -> IO ()
forall a b. IO a -> IO b -> IO a
onException (do
        CInt
_ <- (Ptr (Ptr GError) -> IO CInt) -> IO CInt
forall a. (Ptr (Ptr GError) -> IO a) -> IO a
propagateGError ((Ptr (Ptr GError) -> IO CInt) -> IO CInt)
-> (Ptr (Ptr GError) -> IO CInt) -> IO CInt
forall a b. (a -> b) -> a -> b
$ Ptr Seekable
-> Int64 -> Ptr Cancellable -> Ptr (Ptr GError) -> IO CInt
g_seekable_truncate Ptr Seekable
seekable' Int64
offset Ptr Cancellable
maybeCancellable
        a -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr a
seekable
        Maybe b -> (b -> IO ()) -> IO ()
forall (m :: * -> *) a. Monad m => Maybe a -> (a -> m ()) -> m ()
whenJust Maybe b
cancellable b -> IO ()
forall a. ManagedPtrNewtype a => a -> IO ()
touchManagedPtr
        () -> IO ()
forall (m :: * -> *) a. Monad m => a -> m a
return ()
     ) (do
        () -> IO ()
forall (m :: * -> *) a. Monad m => a -> m a
return ()
     )

#if defined(ENABLE_OVERLOADING)
data SeekableTruncateMethodInfo
instance (signature ~ (Int64 -> Maybe (b) -> m ()), MonadIO m, IsSeekable a, Gio.Cancellable.IsCancellable b) => O.MethodInfo SeekableTruncateMethodInfo a signature where
    overloadedMethod = seekableTruncate

#endif