1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- A D A . S T R E A M S -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2014, Free Software Foundation, Inc. -- 10-- -- 11-- This specification is derived from the Ada Reference Manual for use with -- 12-- GNAT. The copyright notice above, and the license provisions that follow -- 13-- apply solely to the contents of the part following the private keyword. -- 14-- -- 15-- GNAT is free software; you can redistribute it and/or modify it under -- 16-- terms of the GNU General Public License as published by the Free Soft- -- 17-- ware Foundation; either version 3, or (at your option) any later ver- -- 18-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 19-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 20-- or FITNESS FOR A PARTICULAR PURPOSE. -- 21-- -- 22-- As a special exception under Section 7 of GPL version 3, you are granted -- 23-- additional permissions described in the GCC Runtime Library Exception, -- 24-- version 3.1, as published by the Free Software Foundation. -- 25-- -- 26-- You should have received a copy of the GNU General Public License and -- 27-- a copy of the GCC Runtime Library Exception along with this program; -- 28-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 29-- <http://www.gnu.org/licenses/>. -- 30-- -- 31-- GNAT was originally developed by the GNAT team at New York University. -- 32-- Extensive contributions were provided by Ada Core Technologies Inc. -- 33-- -- 34------------------------------------------------------------------------------ 35 36package Ada.Streams is 37 pragma Pure; 38 39 type Root_Stream_Type is abstract tagged limited private; 40 pragma Preelaborable_Initialization (Root_Stream_Type); 41 42 type Stream_Element is mod 2 ** Standard'Storage_Unit; 43 44 type Stream_Element_Offset is new Long_Long_Integer; 45 -- Stream_Element_Offset needs 64 bits to accomodate large stream files. 46 -- However, rather than make this explicitly 64-bits we derive from 47 -- Long_Long_Integer. In normal usage this will have the same effect. 48 -- But in the case of CodePeer with a target configuration file with a 49 -- maximum integer size of 32, it allows analysis of this unit. 50 51 subtype Stream_Element_Count is 52 Stream_Element_Offset range 0 .. Stream_Element_Offset'Last; 53 54 type Stream_Element_Array is 55 array (Stream_Element_Offset range <>) of aliased Stream_Element; 56 57 procedure Read 58 (Stream : in out Root_Stream_Type; 59 Item : out Stream_Element_Array; 60 Last : out Stream_Element_Offset) 61 is abstract; 62 63 procedure Write 64 (Stream : in out Root_Stream_Type; 65 Item : Stream_Element_Array) 66 is abstract; 67 68private 69 70 type Root_Stream_Type is abstract tagged limited null record; 71 72 -- Stream attributes for Stream_Element_Array: trivially call the 73 -- corresponding stream primitive for the whole array, instead of doing 74 -- so element by element. 75 76 procedure Read_SEA 77 (S : access Root_Stream_Type'Class; 78 V : out Stream_Element_Array); 79 80 procedure Write_SEA 81 (S : access Root_Stream_Type'Class; 82 V : Stream_Element_Array); 83 84 for Stream_Element_Array'Read use Read_SEA; 85 for Stream_Element_Array'Write use Write_SEA; 86 87end Ada.Streams; 88