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132 | -- --
-- package GNAT.Sockets. Copyright (c) Dmitry A. Kazakov --
-- Connection_State_Machine.Big_Endian. Luebeck --
-- Generic_Single_Precision_IEEE_754 Winter, 2012 --
-- Implementation --
-- Last revision : 10:13 29 Nov 2020 --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU General Public License as --
-- published by the Free Software Foundation; either version 2 of --
-- the License, 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 along with --
-- this library; if not, write to the Free Software Foundation, --
-- Inc., 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. --
--____________________________________________________________________--
with Ada.Exceptions; use Ada.Exceptions;
with Ada.IO_Exceptions; use Ada.IO_Exceptions;
package body GNAT.Sockets.Connection_State_Machine.Big_Endian.
Generic_Single_Precision_IEEE_754 is
use IEEE_754;
procedure Feed
( Item : in out IEEE_754_Data_Item;
Data : Stream_Element_Array;
Pointer : in out Stream_Element_Offset;
Client : in out State_Machine'Class;
State : in out Stream_Element_Offset
) is
begin
if State > 4 then
Raise_Exception
( Data_Error'Identity,
"Protocol error reading 32-bit big endian IEEE 754"
);
elsif State = 0 then
State := 4;
end if;
while Pointer <= Data'Last and then State > 0 loop
State := State - 1;
Item.Value (4 - Integer (State)) := Byte (Data (Pointer));
Pointer := Pointer + 1;
end loop;
end Feed;
procedure Get
( Data : Stream_Element_Array;
Pointer : in out Stream_Element_Offset;
Value : out Float_32
) is
begin
if ( Pointer < Data'First
or else
( Pointer > Data'Last
and then
Pointer - Data'Last /= 1
) )
then
Raise_Exception (Layout_Error'Identity, Out_Of_Bounds);
elsif Pointer + 3 > Data'Last then
Raise_Exception (End_Error'Identity, "End of data");
end if;
Value :=
( Byte (Data (Pointer)),
Byte (Data (Pointer + 1)),
Byte (Data (Pointer + 2)),
Byte (Data (Pointer + 3))
);
Pointer := Pointer + 4;
end Get;
procedure Get
( Data : Stream_Element_Array;
Pointer : in out Stream_Element_Offset;
Value : out Number
) is
IEEE : Float_32;
begin
Get (Data, Pointer, IEEE);
Value := From_IEEE (IEEE);
end Get;
function Get_Value (Item : IEEE_754_Data_Item) return Number is
begin
return From_IEEE (Item.Value);
end Get_Value;
procedure Put
( Data : in out Stream_Element_Array;
Pointer : in out Stream_Element_Offset;
Value : Float_32
) is
begin
if Pointer < Data'First or else Data'Last - Pointer < 3 then
if Pointer >= Data'First and then Pointer - 1 <= Data'Last then
Raise_Exception (End_Error'Identity, No_Room);
else
Raise_Exception (Layout_Error'Identity, Out_Of_Bounds);
end if;
end if;
Data (Pointer..Pointer + 3) :=
( Stream_Element (Value (1)),
Stream_Element (Value (2)),
Stream_Element (Value (3)),
Stream_Element (Value (4))
);
Pointer := Pointer + 4;
end Put;
procedure Put
( Data : in out Stream_Element_Array;
Pointer : in out Stream_Element_Offset;
Value : Number
) is
begin
Put (Data, Pointer, To_IEEE (Value));
end Put;
end GNAT.Sockets.Connection_State_Machine.Big_Endian.
Generic_Single_Precision_IEEE_754;
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