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sockets-utils.adb
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sockets-utils.adb
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-----------------------------------------------------------------------------
-- --
-- ADASOCKETS COMPONENTS --
-- --
-- S O C K E T S . U T I L S --
-- --
-- B o d y --
-- --
-- Copyright (C) 1998-2010 Samuel Tardieu <sam@rfc1149.net> --
-- Copyright (C) 1999-2003 ENST http://www.enst.fr/ --
-- --
-- AdaSockets is free software; you can redistribute it and/or modify --
-- it under terms of the GNU General Public License as published by --
-- the Free Software Foundation; either version 2, or (at your option) --
-- any later version. AdaSockets is distributed in the hope that it --
-- will be useful, but WITHOUT ANY WARRANTY; without even the implied --
-- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- See the GNU General Public License for more details. You should --
-- have received a copy of the GNU General Public License distributed --
-- with AdaSockets; see file COPYING. If not, write to the Free --
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA --
-- 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from --
-- this unit, or you link this unit with other files to produce an --
-- executable, this unit does not by itself cause the resulting --
-- executable to be covered by the GNU General Public License. This --
-- exception does not however invalidate any other reasons why the --
-- executable file might be covered by the GNU Public License. --
-- --
-- The main repository for this software is located at: --
-- http://www.rfc1149.net/devel/adasockets --
-- --
-- If you have any question, please send a mail to the AdaSockets list --
-- adasockets@lists.rfc1149.net --
-- --
-----------------------------------------------------------------------------
with Ada.Exceptions; use Ada.Exceptions;
with Sockets.Thin; use Sockets.Thin;
with System; use System;
package body Sockets.Utils is
use Interfaces.C;
---------
-- "*" --
---------
function "*" (Left : String; Right : Natural) return String is
Result : String (1 .. Left'Length * Right);
First : Positive := 1;
Last : Natural := First + Left'Length - 1;
begin
for I in 1 .. Right loop
Result (First .. Last) := Left;
First := First + Left'Length;
Last := Last + Left'Length;
end loop;
return Result;
end "*";
-------------------
-- Is_Ip_Address --
-------------------
function Is_IP_Address (Something : String)
return Boolean
is
begin
for Index in Something'Range loop
declare
Current : Character renames Something (Index);
begin
if (Current < '0'
or else Current > '9')
and then Current /= '.' then
return False;
end if;
end;
end loop;
return True;
end Is_IP_Address;
---------------------
-- Port_To_Network --
---------------------
function Port_To_Network (Port : unsigned_short)
return unsigned_short
is
begin
pragma Warnings (Off); -- Test is statically always True or False
if Default_Bit_Order = High_Order_First then
return Port;
else
return (Port / 256) + (Port mod 256) * 256;
end if;
pragma Warnings (On);
end Port_To_Network;
------------------------
-- Raise_With_Message --
------------------------
procedure Raise_With_Message (Message : String;
With_Errno : Boolean := True)
is
Current_Errno : constant Integer := Errno;
begin
if With_Errno then
declare
-- Using a local block avoids implicit memory allocation,
-- which would erase the Errno value on Win32.
Message_Text : constant String := Message & " (errno is" &
Integer'Image (Current_Errno) & ")";
begin
Raise_Exception (Socket_Error'Identity, Message_Text);
end;
else
Raise_Exception (Socket_Error'Identity, Message);
end if;
-- The following line works around a bug in GNAT that does not
-- recognize Ada.Exceptions.Raise_Exception as raising an exception,
-- even if it can compute statically that the occurrence cannot
-- be Null_Occurrence ???
raise Program_Error;
end Raise_With_Message;
end Sockets.Utils;