-- Abstract :
--
-- See spec.
--
-- Copyright (C) 2004, 2009 Stephen Leake. All Rights Reserved.
--
-- This library is free software; you can redistribute it and/or
-- modify it under terms of the GNU General Public License as
-- published by the Free Software Foundation; either version 3, or (at
-- your option) any later version. This library is distributed in the
-- hope that it will be useful, but WITHOUT ANY WARRANTY; without even
-- the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
-- PURPOSE. See the GNU General Public License for more details. You
-- should have received a copy of the GNU General Public License
-- distributed with this program; see file COPYING. If not, write to
-- the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
-- MA 02111-1307, USA.
--
-- As a special exception, if other files instantiate generics from
-- this unit, or you link this unit with other files to produce an
-- executable, this unit does not by itself cause the resulting
-- executable to be covered by the GNU General Public License. This
-- exception does not however invalidate any other reasons why the
-- executable file might be covered by the GNU Public License.
pragma License (Modified_GPL);
with SAL.Endianness; use SAL.Endianness;
with Ada.Unchecked_Conversion;
package body SAL.Network_Order.Gen_Scalar_32 is
function To_4_Byte is new Ada.Unchecked_Conversion
(Target => Network_Byte_Array_4_Type,
Source => Host_32_Type);
function From_4_Byte is new Ada.Unchecked_Conversion
(Target => Host_32_Type,
Source => Network_Byte_Array_4_Type);
procedure To_Network
(Item : in Host_32_Type;
Buffer : in out Ada.Streams.Stream_Element_Array;
Last : in out Ada.Streams.Stream_Element_Offset)
is
use type Ada.Streams.Stream_Element_Offset;
begin
case Byte_Order is
when Big_Endian =>
Buffer (Last + 1 .. Last + 4) := To_4_Byte (Item);
when Little_Endian =>
declare
Temp : constant Network_Byte_Array_4_Type := To_4_Byte (Item);
begin
Buffer (Last + 1) := Temp (4);
Buffer (Last + 2) := Temp (3);
Buffer (Last + 3) := Temp (2);
Buffer (Last + 4) := Temp (1);
end;
end case;
Last := Last + 4;
end To_Network;
procedure From_Network
(Item : out Host_32_Type;
Buffer : in Ada.Streams.Stream_Element_Array;
Last : in out Ada.Streams.Stream_Element_Offset)
is
use type Ada.Streams.Stream_Element_Offset;
begin
case Byte_Order is
when Big_Endian =>
Item := From_4_Byte (Buffer (Last + 1 .. Last + 2));
when Little_Endian =>
declare
Temp : Network_Byte_Array_4_Type;
begin
Temp (1) := Buffer (Last + 4);
Temp (2) := Buffer (Last + 3);
Temp (3) := Buffer (Last + 2);
Temp (4) := Buffer (Last + 1);
Item := From_4_Byte (Temp);
end;
end case;
Last := Last + 4;
end From_Network;
end SAL.Network_Order.Gen_Scalar_32;