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137 | ------------------------------------------------------------------------------
-- --
-- GLADE COMPONENTS --
-- --
-- S Y S T E M . G A R L I C . T Y P E S --
-- --
-- B o d y --
-- --
-- Copyright (C) 1996-2020 Free Software Foundation, Inc. --
-- --
-- GARLIC 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 2, or (at your option) any later ver- --
-- sion. GARLIC is distributed in the hope that it will be useful, but --
-- WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABI- --
-- LITY 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 GARLIC; 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. --
-- --
------------------------------------------------------------------------------
with Ada.Streams; use Ada.Streams;
with Ada.Unchecked_Conversion;
package body System.Garlic.Types is
Version_Id_Window : constant Version_Id := Version_Id'Last / 2;
function Convert is
new Ada.Unchecked_Conversion (Stamp_Type, Stamp_Stream_Element_Array);
function Convert is
new Ada.Unchecked_Conversion (Stamp_Stream_Element_Array, Stamp_Type);
---------
-- "<" --
---------
function "<" (L, R : Version_Id) return Boolean is
begin
return Integer (R - L) < Integer (Version_Id_Window);
end "<";
--------------
-- From_SEA --
--------------
function From_SEA (S : Stamp_Stream_Element_Array) return Stamp_Type is
begin
return Convert (S);
end From_SEA;
----------
-- Read --
----------
function Read (S : Partition_ID_SEA) return Partition_ID
is
P : Partition_ID := 0;
begin
for N in S'Range loop
P := P * 256 + Partition_ID (S (N));
end loop;
return P;
end Read;
----------
-- Read --
----------
procedure Read
(S : access Ada.Streams.Root_Stream_Type'Class;
X : out Partition_ID)
is
SEA : Partition_ID_SEA;
Last : Ada.Streams.Stream_Element_Count;
begin
Ada.Streams.Read (S.all, SEA, Last);
if Last /= SEA'Last then
raise Constraint_Error;
end if;
X := Read (SEA);
end Read;
------------
-- To_SEA --
------------
function To_SEA (S : Stamp_Type) return Stamp_Stream_Element_Array is
begin
return Convert (S);
end To_SEA;
-----------
-- Write --
-----------
function Write (P : Partition_ID) return Partition_ID_SEA
is
S : Partition_ID_SEA;
X : Partition_ID := P;
begin
for N in reverse S'Range loop
S (N) := Ada.Streams.Stream_Element (X mod 256);
X := X / 256;
end loop;
return S;
end Write;
-----------
-- Write --
-----------
procedure Write
(S : access Ada.Streams.Root_Stream_Type'Class;
X : Partition_ID)
is
SEA : Partition_ID_SEA;
begin
SEA := Write (X);
Ada.Streams.Write (S.all, SEA);
end Write;
end System.Garlic.Types;
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