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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . C O M M U N I C A T I O N --
-- --
-- B o d y --
-- --
-- Copyright (C) 2001-2009, 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. --
-- --
------------------------------------------------------------------------------
package body System.Communication is
subtype SEO is Ada.Streams.Stream_Element_Offset;
----------------
-- Last_Index --
----------------
function Last_Index
(First : Ada.Streams.Stream_Element_Offset;
Count : CRTL.size_t) return Ada.Streams.Stream_Element_Offset
is
use type Ada.Streams.Stream_Element_Offset;
use type System.CRTL.size_t;
begin
if First = SEO'First and then Count = 0 then
raise Constraint_Error with
"last index out of range (no element transferred)";
else
return First + SEO (Count) - 1;
end if;
end Last_Index;
end System.Communication;
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