text
stringlengths 0
234
|
|---|
return 0;
|
else
|
return Convert (File.Handle.Size);
|
end if;
|
end Size;
|
----------
|
-- Read --
|
----------
|
function Read
|
(File : File_Descriptor;
|
Addr : System.Address;
|
Length : File_Size)
|
return File_Size
|
is
|
Ret : HALFS.File_Size;
|
Status : Status_Code;
|
begin
|
if File.Handle = null then
|
return 0;
|
end if;
|
Ret := Convert (Length);
|
Status := Convert (File.Handle.Read (Addr, Ret));
|
if Status /= OK then
|
return 0;
|
else
|
return Convert (Ret);
|
end if;
|
end Read;
|
-----------
|
-- Write --
|
-----------
|
function Write
|
(File : File_Descriptor;
|
Addr : System.Address;
|
Length : File_Size)
|
return File_Size
|
is
|
Ret : HALFS.File_Size;
|
Status : Status_Code;
|
begin
|
if File.Handle = null then
|
return 0;
|
end if;
|
Ret := Convert (Length);
|
Status := Convert (File.Handle.Write (Addr, Ret));
|
if Status /= OK then
|
return 0;
|
else
|
return Convert (Ret);
|
end if;
|
end Write;
|
------------
|
-- Offset --
|
------------
|
function Offset
|
(File : File_Descriptor)
|
return File_Size
|
is
|
begin
|
if File.Handle /= null then
|
return Convert (File.Handle.Offset);
|
else
|
return 0;
|
end if;
|
end Offset;
|
----------
|
-- Seek --
|
----------
|
function Seek
|
(File : in out File_Descriptor;
|
Origin : Seek_Mode;
|
Amount : in out File_Size)
|
return Status_Code
|
is
|
Ret : Status_Code;
|
HALFS_Amount : HALFS.File_Size;
|
begin
|
if File.Handle /= null then
|
HALFS_Amount := Convert (Amount);
|
Ret := Convert (File.Handle.Seek (Convert (Origin), HALFS_Amount));
|
Amount := Convert (HALFS_Amount);
|
return Ret;
|
else
|
return Invalid_Parameter;
|
end if;
|
end Seek;
|
-------------------
|
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