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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- T Y P E S --
-- --
-- B o d y --
-- --
-- $Revision: 1.11 $ --
-- --
-- Copyright (C) 1992,1993,1994,1995,1996 Free Software Foundation, Inc. --
-- --
-- GNAT 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. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT 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 GNAT; 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. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
package body Types is
---------
-- "<" --
---------
function "<" (Left, Right : Time_Stamp_Type) return Boolean is
begin
-- The following test deals with year 2000 problems. Consider any
-- date before 700101 to be in the next century.
if Left (1) in '7' .. '9' and then Right (1) in '0' .. '6' then
return True;
elsif Left (1) in '0' .. '6' and then Right (1) in '7' .. '9' then
return False;
-- If not year 2000 special case, then use standard string comparison.
-- Note that this has the right semantics for Empty_Time_Stamp.
else
return String (Left) < String (Right);
end if;
end "<";
----------
-- "<=" --
----------
function "<=" (Left, Right : Time_Stamp_Type) return Boolean is
begin
-- The following test deals with year 2000 problems. Consider any
-- date before 700101 to be in the next century.
if Left (1) in '7' .. '9' and then Right (1) in '0' .. '6' then
return True;
elsif Left (1) in '0' .. '6' and then Right (1) in '7' .. '9' then
return False;
-- If not year 2000 special case, then use standard string comparison.
-- Note that this has the right semantics for Empty_Time_Stamp.
else
return String (Left) <= String (Right);
end if;
end "<=";
---------
-- ">" --
---------
function ">" (Left, Right : Time_Stamp_Type) return Boolean is
begin
return not (Left <= Right);
end ">";
----------
-- ">=" --
----------
function ">=" (Left, Right : Time_Stamp_Type) return Boolean is
begin
return not (Left < Right);
end ">=";
-------------------
-- Get_Char_Code --
-------------------
function Get_Char_Code (C : Character) return Char_Code is
begin
return Char_Code'Val (Character'Pos (C));
end Get_Char_Code;
-------------------
-- Get_Character --
-------------------
-- Note: raises Constraint_Error if checks on and C out of range
function Get_Character (C : Char_Code) return Character is
begin
return Character'Val (C);
end Get_Character;
--------------------
-- Get_Hex_String --
--------------------
subtype Wordh is Word range 0 .. 15;
Hex : constant array (Wordh) of Character := "0123456789ABCDEF";
function Get_Hex_String (W : Word) return Word_Hex_String is
X : Word := W;
WS : Word_Hex_String;
begin
for J in reverse 1 .. 8 loop
WS (J) := Hex (X mod 16);
X := X / 16;
end loop;
return WS;
end Get_Hex_String;
------------------------
-- In_Character_Range --
------------------------
function In_Character_Range (C : Char_Code) return Boolean is
begin
return (C <= 255);
end In_Character_Range;
end Types;
|
