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+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- S Y S T E M . V A L _ B O O L --
+-- --
+-- B o d y --
+-- --
+-- Copyright (C) 1992-2012, 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. --
+-- --
+------------------------------------------------------------------------------
+
+with System.Val_Util; use System.Val_Util;
+
+package body System.Val_Bool is
+
+ -------------------
+ -- Value_Boolean --
+ -------------------
+
+ function Value_Boolean (Str : String) return Boolean is
+ F : Natural;
+ L : Natural;
+ S : String (Str'Range) := Str;
+
+ begin
+ Normalize_String (S, F, L);
+
+ if S (F .. L) = "TRUE" then
+ return True;
+
+ elsif S (F .. L) = "FALSE" then
+ return False;
+
+ else
+ Bad_Value (Str);
+ end if;
+ end Value_Boolean;
+
+end System.Val_Bool;