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Diffstat (limited to 'gcc/ada/g-stseme.adb')
| -rw-r--r-- | gcc/ada/g-stseme.adb | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/gcc/ada/g-stseme.adb b/gcc/ada/g-stseme.adb new file mode 100644 index 0000000..b09af1d --- /dev/null +++ b/gcc/ada/g-stseme.adb @@ -0,0 +1,64 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- GNAT.SOCKETS.THIN.SOCKET_ERROR_MESSAGE -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 2007-2009, AdaCore -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 3, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT 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/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This is the default implementation of this unit, using the standard C +-- library's strerror(3) function. It is used on all platforms except Windows, +-- since on that platform socket errno values are distinct from the system +-- ones: there is a specific variant of this function in g-socthi-mingw.adb. + +with Ada.Unchecked_Conversion; +with System.CRTL; + +separate (GNAT.Sockets.Thin) +function Socket_Error_Message + (Errno : Integer) return C.Strings.chars_ptr +is + use type Interfaces.C.Strings.chars_ptr; + + pragma Warnings (Off); + function To_Chars_Ptr is + new Ada.Unchecked_Conversion + (System.Address, Interfaces.C.Strings.chars_ptr); + -- On VMS, the compiler warns because System.Address is 64 bits, but + -- chars_ptr is 32 bits. It should be safe, though, because strerror + -- will return a 32-bit pointer. + pragma Warnings (On); + + C_Msg : C.Strings.chars_ptr; + +begin + C_Msg := To_Chars_Ptr (System.CRTL.strerror (Errno)); + if C_Msg = C.Strings.Null_Ptr then + return Unknown_System_Error; + else + return C_Msg; + end if; +end Socket_Error_Message; |