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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- S Y S T E M . C O M M U N I C A T I O N --
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6 -- --
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7 -- S p e c --
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8 -- --
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9 -- Copyright (C) 2001-2017, AdaCore --
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNAT was originally developed by the GNAT team at New York University. --
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28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 -- Common support unit for GNAT.Sockets and GNAT.Serial_Communication
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33
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34 with Ada.Streams;
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35 with System.CRTL;
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36
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37 package System.Communication is
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38 pragma Preelaborate;
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39
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40 function Last_Index
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41 (First : Ada.Streams.Stream_Element_Offset;
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42 Count : CRTL.size_t) return Ada.Streams.Stream_Element_Offset;
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43 -- Compute the Last OUT parameter for the various Read / Receive
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44 -- subprograms: returns First + Count - 1.
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45 --
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46 -- When First = Stream_Element_Offset'First and Res = 0, Constraint_Error
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47 -- is raised. This is consistent with the semantics of stream operations
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48 -- as clarified in AI95-227.
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49
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50 end System.Communication;
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