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+------------------------------------------------------------------------------
+-- --
+-- GNAT LIBRARY COMPONENTS --
+-- --
+-- ADA.STRINGS.LESS_CASE_INSENSITIVE --
+-- --
+-- B o d y --
+-- --
+-- Copyright (C) 2004-2009, 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 3, 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. --
+-- --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
+-- --
+-- 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;