gcc/ada/g-stheme.adb

   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
  36 separate (GNAT.Sockets.Thin)
  37 package 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
  74 end Host_Error_Messages;