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|
------------------------------------------------------------------------------
-- --
-- GNAT LIBRARY COMPONENTS --
-- --
-- ADA.STRINGS.LESS_CASE_INSENSITIVE --
-- --
-- B o d y --
-- --
-- Copyright (C) 2004-2005 Free Software Foundation, Inc. --
-- --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- apply solely to the contents of the part following the private keyword. --
-- --
-- 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. --
-- --
-- This unit was originally developed by Matthew J Heaney. --
------------------------------------------------------------------------------
with Ada.Characters.Handling; use Ada.Characters.Handling;
function Ada.Strings.Less_Case_Insensitive
(Left, Right : String) return Boolean
is
LI : Integer := Left'First;
RI : Integer := Right'First;
LC, RC : Character;
begin
if LI > Left'Last then
return RI <= Right'Last;
end if;
if RI > Right'Last then
return False;
end if;
loop
LC := To_Lower (Left (LI));
RC := To_Lower (Right (RI));
if LC < RC then
return True;
end if;
if LC > RC then
return False;
end if;
if LI = Left'Last then
return RI < Right'Last;
end if;
if RI = Right'Last then
return False;
end if;
LI := LI + 1;
RI := RI + 1;
end loop;
end Ada.Strings.Less_Case_Insensitive;
|
