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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- ADA.STRINGS.TEXT_OUTPUT.BUFFERS --
-- --
-- S p e c --
-- --
-- Copyright (C) 2020, Free Software Foundation, Inc. --
-- --
-- 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 Ada.Strings.Text_Output.Buffers is
type Buffer (<>) is new Sink with private;
function New_Buffer
(Indent_Amount : Natural := Default_Indent_Amount;
Chunk_Length : Positive := Default_Chunk_Length) return Buffer;
procedure Destroy (S : in out Buffer);
-- Reclaim any heap-allocated data, and render the Buffer unusable.
-- It would make sense to do this via finalization, but we wish to
-- avoid controlled types in the generated code for 'Image.
function Get_UTF_8 (S : Buffer'Class) return UTF_8_Lines;
-- Get the characters in S, encoded as UTF-8.
function UTF_8_Length (S : Buffer'Class) return Natural;
procedure Get_UTF_8
(S : Buffer'Class; Result : out UTF_8_Lines) with
Pre => Result'First = 1 and Result'Last = UTF_8_Length (S);
-- This is a procedure version of the Get_UTF_8 function, for
-- efficiency. The Result String must be the exact right length.
function Get (S : Buffer'Class) return String;
function Wide_Get (S : Buffer'Class) return Wide_String;
function Wide_Wide_Get (S : Buffer'Class) return Wide_Wide_String;
-- Get the characters in S, decoded as [[Wide_]Wide_]String.
-- There is no need for procedure versions of these, because
-- they are intended primarily to implement the [[Wide_]Wide_]Image
-- attribute, which is already a function.
private
type Chunk_Count is new Natural;
type Buffer is new Sink with record
Num_Extra_Chunks : Natural := 0;
-- Number of chunks in the linked list, not including Initial_Chunk.
end record;
overriding procedure Full_Method (S : in out Buffer);
overriding procedure Flush_Method (S : in out Buffer) is null;
end Ada.Strings.Text_Output.Buffers;
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