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use Ada.Streams;
function Convert is new Ada.Unchecked_Conversion
(Source => Stream_Element_Array, Target => Inotify_Event);
function Convert is new Ada.Unchecked_Conversion
(Source => Interfaces.C.unsigned, Target => Event_Bits);
Event_In_Bytes : constant Stream_Element_Offset
:= Inotify_Event'Size / System.Storage_Unit;
Length : Stream_Element_Offset;
Buffer : Stream_Element_Array (1 .. 4096)
with Alignment => 4;
function Find_Move (Cookie : Interfaces.C.unsigned) return Move_Vectors.Cursor is
Cursor : Move_Vectors.Cursor := Move_Vectors.No_Element;
procedure Reverse_Iterate (Position : Move_Vectors.Cursor) is
use type Interfaces.C.unsigned;
begin
if Cookie = Object.Moves (Position).Key then
Cursor := Position;
end if;
end Reverse_Iterate;
begin
Object.Moves.Reverse_Iterate (Reverse_Iterate'Access);
return Cursor;
end Find_Move;
use type Ada.Containers.Count_Type;
begin
if Object.Watches.Is_Empty then
return;
end if;
Length := Stream_Element_Offset (GNAT.OS_Lib.Read
(Object.Instance, Buffer'Address, Buffer'Length));
if Length = -1 then
raise Read_Error;
end if;
if Length = 0 then
return;
end if;
declare
Index : Stream_Element_Offset := Buffer'First;
begin
Object.Defer_Remove := True;
while Index < Buffer'First + Length loop
declare
Event : constant Inotify_Event
:= Convert (Buffer (Index .. Index + Event_In_Bytes - 1));
Mask : constant Event_Bits := Convert (Event.Mask);
Name_Length : constant Stream_Element_Offset
:= Stream_Element_Offset (Event.Length);
begin
if Mask.Queue_Overflowed then
raise Queue_Overflow_Error;
end if;
pragma Assert (Event.Watch /= -1);
if Mask.Ignored then
Object.Watches.Exclude (Event.Watch);
else
declare
Directory : constant String := Object.Watches.Element (Event.Watch);
begin
if Name_Length > 0 then
declare
subtype Name_Array is Interfaces.C.char_array
(1 .. Interfaces.C.size_t (Event.Length));
subtype Name_Buffer is Stream_Element_Array
(1 .. Name_Length);
function Convert is new Ada.Unchecked_Conversion
(Source => Name_Buffer, Target => Name_Array);
Name_Index : constant Stream_Element_Offset
:= Index + Event_In_Bytes;
Name : constant String := Interfaces.C.To_Ada (Convert
(Buffer (Name_Index .. Name_Index + Name_Length - 1)));
begin
Handle
((Watch => Event.Watch), Mask.Event,
Mask.Is_Directory, Directory & "/" & Name);
case Mask.Event is
when Moved_From =>
if Object.Moves.Length = Object.Moves.Capacity then
Object.Moves.Delete_First;
end if;
Object.Moves.Append ((Event.Cookie,
(From => SU.To_Unbounded_String (Directory & "/" & Name),
To => <>)));