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252 | -------------------------------------------------------------------------------
-- --
-- Copyright (C) 2020-2030, per.s.sandberg@bahnhof.se --
-- --
-- Permission is hereby granted, free of charge, to any person obtaining a --
-- copy of this software and associated documentation files --
-- (the "Software"), to deal in the Software without restriction, including --
-- without limitation the rights to use, copy, modify, merge, publish, --
-- distribute, sublicense, and / or sell copies of the Software, and to --
-- permit persons to whom the Software is furnished to do so, subject to --
-- the following conditions : --
-- --
-- The above copyright notice and this permission notice shall be included --
-- in all copies or substantial portions of the Software. --
-- --
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS --
-- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF --
-- MERCHANTABILITY, --
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL --
-- THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR --
-- OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, --
-- ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR --
-- OTHER DEALINGS IN THE SOFTWARE. --
-------------------------------------------------------------------------------
-- --
------------------------------------------------------------------------------
with Ada.IO_Exceptions;
with GNAT.Memory_Dump;
with System.Memory;
package body ZMQ.Utilities.Memory_Streams is
use Ada.Streams;
overriding
procedure Dump
(This : in Memory_Stream;
Full_Buffer : in Boolean := False;
Outf : in Text_IO.File_Access := Text_IO.Standard_Output) is
pragma Unreferenced (Outf);
Buffer : Large_Buffer_Access renames This.Buffer.As_Pointer;
begin
if Full_Buffer then
GNAT.Memory_Dump.Dump
(Buffer.all (Buffer.all'First)'Address,
Integer (This.Buffer_Length));
else
GNAT.Memory_Dump.Dump
(Buffer.all (Buffer.all'First)'Address,
Integer (This.Cursor) - 1);
end if;
end Dump;
overriding function Eof (This : in Memory_Stream) return Boolean is
begin
return This.Cursor > This.Buffer_Length;
end Eof;
-----------------
-- Get_Address --
-----------------
overriding
function Get_Address (This : in Memory_Stream) return System.Address is
begin
return This.Buffer.As_Address;
end Get_Address;
----------------
-- Get_Length --
----------------
overriding function Get_Length (This : in Memory_Stream)
return Ada.Streams.Stream_Element_Count is
begin
return This.Buffer_Length;
end Get_Length;
overriding procedure Seek (This : in out Memory_Stream;
Pos : in Ada.Streams.Stream_Element_Offset) is
begin
This.Cursor := This.Cursor + Pos;
end Seek;
overriding function Pos (This : in Memory_Stream)
return Ada.Streams.Stream_Element_Offset is
begin
return This.Cursor;
end Pos;
-----------------
-- Set_Address --
-----------------
overriding
procedure Set_Address
(This : in out Memory_Stream; To : in System.Address) is
begin
This.Buffer.As_Address := To;
end Set_Address;
----------------
-- Set_Length --
----------------
overriding
procedure Set_Length (This : in out Memory_Stream;
To : in Ada.Streams.Stream_Element_Count) is
begin
This.Buffer_Length := To;
This.Reset;
end Set_Length;
----------
-- Read --
----------
overriding
procedure Read
(This : in out Memory_Stream;
Item : out Stream_Element_Array;
Last : out Stream_Element_Offset)
is
First : Stream_Element_Offset;
LLast : Stream_Element_Offset;
begin
First := This.Cursor;
LLast := This.Cursor + Item'Length - 1;
if LLast > This.Buffer_Length then
raise Ada.IO_Exceptions.End_Error;
end if;
Item := This.Buffer.As_Pointer.all (First .. LLast);
This.Cursor := LLast + 1;
Last := Item'Last;
end Read;
-----------
-- Write --
-----------
overriding
procedure Write
(This : in out Memory_Stream;
Item : in Stream_Element_Array)
is
First : Stream_Element_Offset;
Last : Stream_Element_Offset;
begin
First := This.Cursor;
Last := This.Cursor + Item'Length - 1;
if Last > This.Buffer_Length then
raise Ada.IO_Exceptions.Device_Error;
end if;
This.Cursor := Last + 1;
This.Buffer.As_Pointer.all (First .. Last) := Item;
end Write;
overriding
procedure Reset (This : in out Memory_Stream) is
begin
This.Cursor := This.Buffer.As_Pointer.all'First;
end Reset;
procedure Read
(This : not null access Ada.Streams.Root_Stream_Type'Class;
Item : out Memory_Stream) is
begin
raise Program_Error with
"Its not possible to read into a memory stream using 'read";
end Read;
procedure Write
(This : not null access Ada.Streams.Root_Stream_Type'Class;
Item : in Memory_Stream) is
begin
Ada.Streams.Stream_Element_Array'Write
(This,
Item.Buffer.As_Pointer.all
(Item.Buffer.As_Pointer.all'First .. Item.Cursor));
end Write;
procedure Read
(This : not null access Ada.Streams.Root_Stream_Type'Class;
Item : out Dynamic_Memory_Stream) is
begin
Read (This, Memory_Stream (Item));
end Read;
procedure Write
(This : not null access Ada.Streams.Root_Stream_Type'Class;
Item : in Dynamic_Memory_Stream) is
begin
Write (This, Memory_Stream (Item));
end Write;
procedure Write
(This : in out Dynamic_Memory_Stream;
Item : in Ada.Streams.Stream_Element_Array) is
begin
if This.Cursor + Item'Length > This.Buffer_Length then
This.Expand (This.Cursor + Item'Length);
end if;
Memory_Stream (This).Write (Item);
end Write;
procedure Expand
(This : in out Dynamic_Memory_Stream;
To_Size : Ada.Streams.Stream_Element_Offset) is
New_Size : System.Memory.size_t := 0;
use System.Memory;
begin
while New_Size < size_t (To_Size) loop
case This.Strategy is
when As_Needed =>
New_Size := size_t (To_Size);
when Multiply_By_Two =>
New_Size := size_t (2 * This.Buffer_Length);
when Add_Initial_Size =>
New_Size := size_t (This.Buffer_Length + This.Initial_Size);
end case;
end loop;
This.Buffer.As_Address := System.Memory.Realloc
(This.Buffer.As_Address, New_Size);
This.Buffer_Length := Streams.Stream_Element_Count (New_Size);
end Expand;
procedure Initialize (This : in out Dynamic_Memory_Stream) is
use System.Memory;
begin
This.Buffer.As_Address :=
System.Memory.Alloc (size_t (This.Initial_Size));
This.Buffer_Length := This.Initial_Size;
end Initialize;
procedure Finalize (This : in out Dynamic_Memory_Stream) is
begin
System.Memory.Free (This.Buffer.As_Address);
end Finalize;
procedure Initialize (This : in out Controler) is
begin
This.Controled.Initialize;
end Initialize;
procedure Finalize (This : in out Controler) is
begin
This.Controled.Finalize;
end Finalize;
end ZMQ.Utilities.Memory_Streams;
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