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1 12 jlechner
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT LIBRARY COMPONENTS                          --
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--                                                                          --
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--                    ADA.STRINGS.LESS_CASE_INSENSITIVE                     --
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--                                                                          --
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--                                 B o d y                                  --
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--                                                                          --
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--          Copyright (C) 2004-2005, Free Software Foundation, Inc.         --
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--                                                                          --
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-- This specification is derived from the Ada Reference Manual for use with --
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-- GNAT. The copyright notice above, and the license provisions that follow --
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-- apply solely to the  contents of the part following the private keyword. --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 2,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
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-- for  more details.  You should have  received  a copy of the GNU General --
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-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
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-- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
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-- Boston, MA 02110-1301, USA.                                              --
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--                                                                          --
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-- As a special exception,  if other files  instantiate  generics from this --
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-- unit, or you link  this unit with other files  to produce an executable, --
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-- this  unit  does not  by itself cause  the resulting  executable  to  be --
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-- covered  by the  GNU  General  Public  License.  This exception does not --
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-- however invalidate  any other reasons why  the executable file  might be --
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-- covered by the  GNU Public License.                                      --
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--                                                                          --
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-- This unit was originally developed by Matthew J Heaney.                  --
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------------------------------------------------------------------------------
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with Ada.Characters.Handling; use Ada.Characters.Handling;
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function Ada.Strings.Less_Case_Insensitive
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  (Left, Right : String) return Boolean
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is
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   LI : Integer := Left'First;
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   RI : Integer := Right'First;
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   LC, RC : Character;
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begin
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   if LI > Left'Last then
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      return RI <= Right'Last;
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   end if;
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   if RI > Right'Last then
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      return False;
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   end if;
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   loop
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      LC := To_Lower (Left (LI));
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      RC := To_Lower (Right (RI));
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      if LC < RC then
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         return True;
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      end if;
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      if LC > RC then
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         return False;
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      end if;
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      if LI = Left'Last then
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         return RI < Right'Last;
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      end if;
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      if RI = Right'Last then
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         return False;
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      end if;
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      LI := LI + 1;
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      RI := RI + 1;
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   end loop;
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end Ada.Strings.Less_Case_Insensitive;

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