51 lines
2.9 KiB
Ada
51 lines
2.9 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- S Y S T E M . C O M M U N I C A T I O N --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 2001-2012, AdaCore --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- Common support unit for GNAT.Sockets and GNAT.Serial_Communication
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with Ada.Streams;
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with System.CRTL;
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package System.Communication is
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pragma Preelaborate;
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function Last_Index
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(First : Ada.Streams.Stream_Element_Offset;
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Count : CRTL.size_t) return Ada.Streams.Stream_Element_Offset;
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-- Compute the Last OUT parameter for the various Read / Receive
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-- subprograms: returns First + Count - 1.
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--
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-- When First = Stream_Element_Offset'First and Res = 0, Constraint_Error
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-- is raised. This is consistent with the semantics of stream operations
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-- as clarified in AI95-227.
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end System.Communication;
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