/usr/share/ada/adainclude/aws/aws-resources-streams-disk.adb is in libaws3.3.2-dev 3.3.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- Ada Web Server --
-- --
-- Copyright (C) 2000-2012, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU General Public License as published by the --
-- Free Software Foundation; either version 3, or (at your option) any --
-- later version. This library is distributed in the hope that it will be --
-- useful, but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are --
-- granted additional permissions described in the GCC Runtime Library --
-- Exception, version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
------------------------------------------------------------------------------
package body AWS.Resources.Streams.Disk is
-----------
-- Close --
-----------
overriding procedure Close (Resource : in out Stream_Type) is
begin
if Stream_IO.Is_Open (Resource.File) then
Stream_IO.Close (Resource.File);
end if;
end Close;
-----------------
-- End_Of_File --
-----------------
overriding function End_Of_File
(Resource : Stream_Type) return Boolean is
begin
return Resource.Current > Resource.Last
and then Stream_IO.End_Of_File (Resource.File);
end End_Of_File;
----------
-- Name --
----------
overriding function Name (Resource : Stream_Type) return String is
begin
return To_String (Resource.Name);
end Name;
----------
-- Open --
----------
procedure Open
(File : out Stream_Type;
Name : String;
Form : String := "shared=no") is
begin
File.Name := To_Unbounded_String (Name);
Stream_IO.Open
(File.File,
Stream_IO.In_File, Name, Form);
File.Stream := Stream_IO.Stream (File.File);
exception
when Stream_IO.Name_Error =>
null;
end Open;
----------
-- Read --
----------
overriding procedure Read
(Resource : in out Stream_Type;
Buffer : out Stream_Element_Array;
Last : out Stream_Element_Offset)
is
Buf_Len : constant Stream_Element_Offset :=
Resource.Last - Resource.Current + 1;
begin
if Buffer'Length <= Natural (Buf_Len) then
-- Enough chars in the buffer, return them
Buffer := Resource.Buffer
(Resource.Current .. Resource.Current + Buffer'Length - 1);
Resource.Current := Resource.Current + Buffer'Length;
Last := Buffer'Last;
else
-- Return the current buffer
Buffer (Buffer'First .. Buffer'First + Buf_Len - 1) :=
Resource.Buffer (Resource.Current .. Resource.Last);
-- And read the remaining data directly on the file
Read (Resource.Stream.all,
Buffer (Buffer'First + Buf_Len .. Buffer'Last),
Last);
Resource.Current := Resource.Buffer'First;
if Last < Buffer'Last then
-- There is no more data, set the Resource object
Resource.Last := 0;
else
-- Fill Resource buffer
Read (Resource.Stream.all, Resource.Buffer, Resource.Last);
end if;
end if;
end Read;
-----------
-- Reset --
-----------
overriding procedure Reset (Resource : in out Stream_Type) is
begin
Stream_IO.Reset (Resource.File);
end Reset;
---------------
-- Set_Index --
---------------
overriding procedure Set_Index
(Resource : in out Stream_Type;
To : Stream_Element_Offset)
is
use type Stream_IO.Count;
Size : constant Stream_Element_Offset :=
Stream_Element_Offset (Stream_IO.Size (Resource.File));
Pos : Stream_Element_Offset := To;
begin
if To < 1 or else To > Size then
Pos := Size + 1;
end if;
Stream_IO.Set_Index (Resource.File, Stream_IO.Count (Pos));
end Set_Index;
----------
-- Size --
----------
overriding function Size
(Resource : Stream_Type) return Stream_Element_Offset is
begin
return Stream_Element_Offset (Stream_IO.Size (Resource.File));
end Size;
end AWS.Resources.Streams.Disk;
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