255 lines
9.6 KiB
Ada
255 lines
9.6 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- S Y S T E M . S T R I N G S . S T R E A M _ O P S --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 2009-2013, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This package provides subprogram implementations of stream attributes for
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-- the following types using a "block IO" approach in which the entire data
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-- item is written in one operation, instead of writing individual characters.
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-- Ada.Stream_Element_Array
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-- Ada.String
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-- Ada.Wide_String
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-- Ada.Wide_Wide_String
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-- System.Storage_Array
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-- Note: this routine is in Ada.Strings because historically it handled only
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-- the string types. It is not worth moving it at this stage.
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-- The compiler will generate references to the subprograms in this package
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-- when expanding stream attributes for the above mentioned types. Example:
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-- String'Output (Some_Stream, Some_String);
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-- will be expanded into:
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-- String_Output (Some_Stream, Some_String);
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-- or
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-- String_Output_Blk_IO (Some_Stream, Some_String);
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-- String_Output form is used if pragma Restrictions (No_String_Optimziations)
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-- is active, which requires element by element operations. The BLK_IO form
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-- is used if this restriction is not set, allowing block optimization.
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-- Note that if System.Stream_Attributes.Block_IO_OK is False, then the BLK_IO
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-- form is treated as equivalent to the normal case, so that the optimization
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-- is inhibited anyway, regardless of the setting of the restriction. This
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-- handles versions of System.Stream_Attributes (in particular the XDR version
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-- found in s-stratt-xdr) which do not permit block io optimization.
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pragma Compiler_Unit_Warning;
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with Ada.Streams;
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with System.Storage_Elements;
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package System.Strings.Stream_Ops is
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-------------------------------------
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-- Storage_Array stream operations --
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-------------------------------------
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function Storage_Array_Input
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(Strm : access Ada.Streams.Root_Stream_Type'Class)
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return System.Storage_Elements.Storage_Array;
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function Storage_Array_Input_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class)
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return System.Storage_Elements.Storage_Array;
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procedure Storage_Array_Output
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : System.Storage_Elements.Storage_Array);
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procedure Storage_Array_Output_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : System.Storage_Elements.Storage_Array);
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procedure Storage_Array_Read
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : out System.Storage_Elements.Storage_Array);
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procedure Storage_Array_Read_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : out System.Storage_Elements.Storage_Array);
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procedure Storage_Array_Write
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : System.Storage_Elements.Storage_Array);
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procedure Storage_Array_Write_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : System.Storage_Elements.Storage_Array);
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--------------------------------------------
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-- Stream_Element_Array stream operations --
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--------------------------------------------
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function Stream_Element_Array_Input
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(Strm : access Ada.Streams.Root_Stream_Type'Class)
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return Ada.Streams.Stream_Element_Array;
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function Stream_Element_Array_Input_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class)
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return Ada.Streams.Stream_Element_Array;
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procedure Stream_Element_Array_Output
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : Ada.Streams.Stream_Element_Array);
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procedure Stream_Element_Array_Output_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : Ada.Streams.Stream_Element_Array);
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procedure Stream_Element_Array_Read
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : out Ada.Streams.Stream_Element_Array);
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procedure Stream_Element_Array_Read_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : out Ada.Streams.Stream_Element_Array);
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procedure Stream_Element_Array_Write
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : Ada.Streams.Stream_Element_Array);
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procedure Stream_Element_Array_Write_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : Ada.Streams.Stream_Element_Array);
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------------------------------
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-- String stream operations --
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------------------------------
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function String_Input
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(Strm : access Ada.Streams.Root_Stream_Type'Class)
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return String;
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function String_Input_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class)
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return String;
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procedure String_Output
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : String);
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procedure String_Output_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : String);
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procedure String_Read
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : out String);
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procedure String_Read_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : out String);
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procedure String_Write
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : String);
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procedure String_Write_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : String);
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-----------------------------------
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-- Wide_String stream operations --
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-----------------------------------
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function Wide_String_Input
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(Strm : access Ada.Streams.Root_Stream_Type'Class)
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return Wide_String;
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function Wide_String_Input_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class)
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return Wide_String;
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procedure Wide_String_Output
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : Wide_String);
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procedure Wide_String_Output_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : Wide_String);
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procedure Wide_String_Read
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : out Wide_String);
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procedure Wide_String_Read_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : out Wide_String);
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procedure Wide_String_Write
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : Wide_String);
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procedure Wide_String_Write_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : Wide_String);
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----------------------------------------
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-- Wide_Wide_String stream operations --
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----------------------------------------
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function Wide_Wide_String_Input
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(Strm : access Ada.Streams.Root_Stream_Type'Class)
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return Wide_Wide_String;
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function Wide_Wide_String_Input_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class)
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return Wide_Wide_String;
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procedure Wide_Wide_String_Output
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : Wide_Wide_String);
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procedure Wide_Wide_String_Output_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : Wide_Wide_String);
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procedure Wide_Wide_String_Read
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : out Wide_Wide_String);
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procedure Wide_Wide_String_Read_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : out Wide_Wide_String);
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procedure Wide_Wide_String_Write
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : Wide_Wide_String);
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procedure Wide_Wide_String_Write_Blk_IO
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(Strm : access Ada.Streams.Root_Stream_Type'Class;
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Item : Wide_Wide_String);
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end System.Strings.Stream_Ops;
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