1------------------------------------------------------------------------------
2--                                                                          --
3--                            Matreshka Project                             --
4--                                                                          --
5--         Localization, Internationalization, Globalization for Ada        --
6--                                                                          --
7--                        Runtime Library Component                         --
8--                                                                          --
9------------------------------------------------------------------------------
10--                                                                          --
11-- Copyright © 2012, Vadim Godunko <vgodunko@gmail.com>                     --
12-- All rights reserved.                                                     --
13--                                                                          --
14-- Redistribution and use in source and binary forms, with or without       --
15-- modification, are permitted provided that the following conditions       --
16-- are met:                                                                 --
17--                                                                          --
18--  * Redistributions of source code must retain the above copyright        --
19--    notice, this list of conditions and the following disclaimer.         --
20--                                                                          --
21--  * Redistributions in binary form must reproduce the above copyright     --
22--    notice, this list of conditions and the following disclaimer in the   --
23--    documentation and/or other materials provided with the distribution.  --
24--                                                                          --
25--  * Neither the name of the Vadim Godunko, IE nor the names of its        --
26--    contributors may be used to endorse or promote products derived from  --
27--    this software without specific prior written permission.              --
28--                                                                          --
29-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS      --
30-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT        --
31-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR    --
32-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT     --
33-- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,   --
34-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED --
35-- TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR   --
36-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF   --
37-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING     --
38-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS       --
39-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.             --
40--                                                                          --
41------------------------------------------------------------------------------
42--  $Revision: 5259 $ $Date: 2015-05-06 17:32:50 +0300 (Wed, 06 May 2015) $
43------------------------------------------------------------------------------
44
45with Matreshka.Internals.Unicode;
46
47package Abstract_Sources is
48
49   subtype Code_Unit_32 is Matreshka.Internals.Unicode.Code_Unit_32;
50
51   type Abstract_Source is limited interface;
52
53   Error         : constant Code_Unit_32 := 16#7FFFFFFF#;
54   End_Of_Input  : constant Code_Unit_32 := 16#7FFFFFFE#;
55   End_Of_Data   : constant Code_Unit_32 := 16#7FFFFFFD#;
56   End_Of_Buffer : constant Code_Unit_32 := 16#7FFFFFFC#;
57
58   type Source_Access is access all Abstract_Source'Class;
59
60   not overriding function Get_Next
61    (Self : not null access Abstract_Source) return Code_Unit_32 is abstract;
62
63end Abstract_Sources;
64