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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
-- --
-- S Y S T E M . S T R I N G S . S T R E A M _ O P S --
-- --
-- S p e c --
-- --
-- Copyright (C) 2009-2018, 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. --
-- --
------------------------------------------------------------------------------
-- This package provides subprogram implementations of stream attributes for
-- the following types using a "block IO" approach in which the entire data
-- item is written in one operation, instead of writing individual characters.
-- Ada.Stream_Element_Array
-- Ada.String
-- Ada.Wide_String
-- Ada.Wide_Wide_String
-- System.Storage_Array
-- Note: this routine is in Ada.Strings because historically it handled only
-- the string types. It is not worth moving it at this stage.
-- The compiler will generate references to the subprograms in this package
-- when expanding stream attributes for the above mentioned types. Example:
-- String'Output (Some_Stream, Some_String);
-- will be expanded into:
-- String_Output (Some_Stream, Some_String);
-- or
-- String_Output_Blk_IO (Some_Stream, Some_String);
-- String_Output form is used if pragma Restrictions (No_String_Optimziations)
-- is active, which requires element by element operations. The BLK_IO form
-- is used if this restriction is not set, allowing block optimization.
-- Note that if System.Stream_Attributes.Block_IO_OK is False, then the BLK_IO
-- form is treated as equivalent to the normal case, so that the optimization
-- is inhibited anyway, regardless of the setting of the restriction. This
-- handles versions of System.Stream_Attributes (in particular the XDR version
-- found in s-stratt-xdr) which do not permit block io optimization.
pragma Compiler_Unit_Warning;
with Ada.Streams;
with System.Storage_Elements;
package System.Strings.Stream_Ops is
-------------------------------------
-- Storage_Array stream operations --
-------------------------------------
function Storage_Array_Input
(Strm : access Ada.Streams.Root_Stream_Type'Class)
return System.Storage_Elements.Storage_Array;
function Storage_Array_Input_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class)
return System.Storage_Elements.Storage_Array;
procedure Storage_Array_Output
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : System.Storage_Elements.Storage_Array);
procedure Storage_Array_Output_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : System.Storage_Elements.Storage_Array);
procedure Storage_Array_Read
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : out System.Storage_Elements.Storage_Array);
procedure Storage_Array_Read_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : out System.Storage_Elements.Storage_Array);
procedure Storage_Array_Write
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : System.Storage_Elements.Storage_Array);
procedure Storage_Array_Write_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : System.Storage_Elements.Storage_Array);
--------------------------------------------
-- Stream_Element_Array stream operations --
--------------------------------------------
function Stream_Element_Array_Input
(Strm : access Ada.Streams.Root_Stream_Type'Class)
return Ada.Streams.Stream_Element_Array;
function Stream_Element_Array_Input_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class)
return Ada.Streams.Stream_Element_Array;
procedure Stream_Element_Array_Output
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : Ada.Streams.Stream_Element_Array);
procedure Stream_Element_Array_Output_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : Ada.Streams.Stream_Element_Array);
procedure Stream_Element_Array_Read
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : out Ada.Streams.Stream_Element_Array);
procedure Stream_Element_Array_Read_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : out Ada.Streams.Stream_Element_Array);
procedure Stream_Element_Array_Write
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : Ada.Streams.Stream_Element_Array);
procedure Stream_Element_Array_Write_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : Ada.Streams.Stream_Element_Array);
------------------------------
-- String stream operations --
------------------------------
function String_Input
(Strm : access Ada.Streams.Root_Stream_Type'Class)
return String;
function String_Input_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class)
return String;
function String_Input_Tag
(Strm : access Ada.Streams.Root_Stream_Type'Class)
return String;
-- Same as String_Input_Blk_IO, except raises an exception for overly long
-- Strings. See expansion of Attribute_Input in Exp_Attr for details.
procedure String_Output
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : String);
procedure String_Output_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : String);
procedure String_Read
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : out String);
procedure String_Read_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : out String);
procedure String_Write
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : String);
procedure String_Write_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : String);
-----------------------------------
-- Wide_String stream operations --
-----------------------------------
function Wide_String_Input
(Strm : access Ada.Streams.Root_Stream_Type'Class)
return Wide_String;
function Wide_String_Input_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class)
return Wide_String;
procedure Wide_String_Output
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : Wide_String);
procedure Wide_String_Output_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : Wide_String);
procedure Wide_String_Read
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : out Wide_String);
procedure Wide_String_Read_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : out Wide_String);
procedure Wide_String_Write
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : Wide_String);
procedure Wide_String_Write_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : Wide_String);
----------------------------------------
-- Wide_Wide_String stream operations --
----------------------------------------
function Wide_Wide_String_Input
(Strm : access Ada.Streams.Root_Stream_Type'Class)
return Wide_Wide_String;
function Wide_Wide_String_Input_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class)
return Wide_Wide_String;
procedure Wide_Wide_String_Output
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : Wide_Wide_String);
procedure Wide_Wide_String_Output_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : Wide_Wide_String);
procedure Wide_Wide_String_Read
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : out Wide_Wide_String);
procedure Wide_Wide_String_Read_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : out Wide_Wide_String);
procedure Wide_Wide_String_Write
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : Wide_Wide_String);
procedure Wide_Wide_String_Write_Blk_IO
(Strm : access Ada.Streams.Root_Stream_Type'Class;
Item : Wide_Wide_String);
end System.Strings.Stream_Ops;
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