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+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME COMPONENTS --
+-- --
+-- S Y S T E M . C A S E _ U T I L --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 1995-2009, 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/>. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
+-- --
+------------------------------------------------------------------------------
+
+-- Simple casing functions
+
+-- This package provides simple casing functions that do not require the
+-- overhead of the full casing tables found in Ada.Characters.Handling.
+
+-- Note that all the routines in this package are available to the user
+-- via GNAT.Case_Util, which imports all the entities from this package.
+
+pragma Compiler_Unit;
+
+package System.Case_Util is
+ pragma Pure;
+
+ -- Note: all the following functions handle the full Latin-1 set
+
+ function To_Upper (A : Character) return Character;
+ -- Converts A to upper case if it is a lower case letter, otherwise
+ -- returns the input argument unchanged.
+
+ procedure To_Upper (A : in out String);
+ -- Folds all characters of string A to upper case
+
+ function To_Lower (A : Character) return Character;
+ -- Converts A to lower case if it is an upper case letter, otherwise
+ -- returns the input argument unchanged.
+
+ procedure To_Lower (A : in out String);
+ -- Folds all characters of string A to lower case
+
+ procedure To_Mixed (A : in out String);
+ -- Converts A to mixed case (i.e. lower case, except for initial
+ -- character and any character after an underscore, which are
+ -- converted to upper case.
+
+end System.Case_Util;