1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT COMPILER COMPONENTS                         --
4--                                                                          --
5--                   GNAT.SOCKETS.THIN.HOST_ERROR_MESSAGES                  --
6--                                                                          --
7--                                 B o d y                                  --
8--                                                                          --
9--                     Copyright (C) 2007-2010, 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-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception,   --
20-- version 3.1, as published by the Free Software Foundation.               --
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--  This is the default implementation of this unit, providing explicit
33--  literal messages (we do not use hstrerror from the standard C library,
34--  as this function is obsolete).
35
36separate (GNAT.Sockets.Thin)
37package body Host_Error_Messages is
38
39   package Messages is
40      HOST_NOT_FOUND : aliased char_array := "Host not found" & nul;
41      TRY_AGAIN      : aliased char_array := "Try again"      & nul;
42      NO_RECOVERY    : aliased char_array := "No recovery"    & nul;
43      NO_DATA        : aliased char_array := "No address"     & nul;
44      Unknown_Error  : aliased char_array := "Unknown error"  & nul;
45   end Messages;
46
47   function Host_Error_Message (H_Errno : Integer) return C.Strings.chars_ptr
48   is
49      use Interfaces.C.Strings;
50      function TCP
51        (P : char_array_access; Nul_Check : Boolean := False) return chars_ptr
52         renames To_Chars_Ptr;
53
54   begin
55      case H_Errno is
56         when SOSC.HOST_NOT_FOUND =>
57            return TCP (Messages.HOST_NOT_FOUND'Access);
58
59         when SOSC.TRY_AGAIN      =>
60            return TCP (Messages.TRY_AGAIN'Access);
61
62         when SOSC.NO_RECOVERY    =>
63            return TCP (Messages.NO_RECOVERY'Access);
64
65         when SOSC.NO_DATA        =>
66            return TCP (Messages.NO_DATA'Access);
67
68         when others              =>
69            return TCP (Messages.Unknown_Error'Access);
70
71      end case;
72   end Host_Error_Message;
73
74end Host_Error_Messages;
75