File : s-commun.ads
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- S Y S T E M . C O M M U N I C A T I O N --
6 -- --
7 -- S p e c --
8 -- --
9 -- Copyright (C) 2001-2012, AdaCore --
10 -- --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
17 -- --
18 -- --
19 -- --
20 -- --
21 -- --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
26 -- --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
29 -- --
30 ------------------------------------------------------------------------------
31
32 -- Common support unit for GNAT.Sockets and GNAT.Serial_Communication
33
34 with Ada.Streams;
35 with System.CRTL;
36
37 package System.Communication is
38 pragma Preelaborate;
39
40 function Last_Index
41 (First : Ada.Streams.Stream_Element_Offset;
42 Count : CRTL.size_t) return Ada.Streams.Stream_Element_Offset;
43 -- Compute the Last OUT parameter for the various Read / Receive
44 -- subprograms: returns First + Count - 1.
45 --
46 -- When First = Stream_Element_Offset'First and Res = 0, Constraint_Error
47 -- is raised. This is consistent with the semantics of stream operations
48 -- as clarified in AI95-227.
49
50 end System.Communication;