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------------------------------------------------------------------------------
-- --
-- GNAT LIBRARY COMPONENTS --
-- --
-- A D A . S T R E A M S . S T O R A G E . B O U N D E D --
-- --
-- S p e c --
-- --
-- Copyright (C) 2020-2024, Free Software Foundation, Inc. --
-- --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- apply solely to the contents of the part following the private keyword. --
-- --
-- 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/>. --
-- --
------------------------------------------------------------------------------
package Ada.Streams.Storage.Bounded with Pure is
type Stream_Type (Max_Elements : Stream_Element_Count) is
new Storage_Stream_Type with private with
Default_Initial_Condition => Element_Count (Stream_Type) = 0;
overriding procedure Read
(Stream : in out Stream_Type; Item : out Stream_Element_Array;
Last : out Stream_Element_Offset)
with Post =>
(declare
Num_Read : constant Stream_Element_Count :=
Stream_Element_Count'Min
(Element_Count (Stream)'Old, Item'Length);
begin
Last = Num_Read + Item'First - 1
and
Element_Count (Stream) =
Element_Count (Stream)'Old - Num_Read);
overriding procedure Write
(Stream : in out Stream_Type; Item : Stream_Element_Array) with
Post => Element_Count (Stream) =
Element_Count (Stream)'Old + Item'Length;
overriding function Element_Count
(Stream : Stream_Type) return Stream_Element_Count with
Post => Element_Count'Result <= Stream.Max_Elements;
overriding procedure Clear (Stream : in out Stream_Type) with
Post => Element_Count (Stream) = 0;
private
type Stream_Type (Max_Elements : Stream_Element_Count) is
new Storage_Stream_Type with record
Count : Stream_Element_Count := 0;
Elements : Stream_Element_Array (1 .. Max_Elements);
end record;
end Ada.Streams.Storage.Bounded;
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