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+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- S Y S T E M . V A L _ L L I --
+-- --
+-- B o d y --
+-- --
+-- Copyright (C) 1992-2009, 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. --
+-- --
+------------------------------------------------------------------------------
+
+with System.Unsigned_Types; use System.Unsigned_Types;
+with System.Val_LLU; use System.Val_LLU;
+with System.Val_Util; use System.Val_Util;
+
+package body System.Val_LLI is
+
+ ----------------------------
+ -- Scan_Long_Long_Integer --
+ ----------------------------
+
+ function Scan_Long_Long_Integer
+ (Str : String;
+ Ptr : not null access Integer;
+ Max : Integer) return Long_Long_Integer
+ is
+ Uval : Long_Long_Unsigned;
+ -- Unsigned result
+
+ Minus : Boolean := False;
+ -- Set to True if minus sign is present, otherwise to False
+
+ Start : Positive;
+ -- Saves location of first non-blank (not used in this case)
+
+ begin
+ Scan_Sign (Str, Ptr, Max, Minus, Start);
+
+ if Str (Ptr.all) not in '0' .. '9' then
+ Ptr.all := Start;
+ raise Constraint_Error;
+ end if;
+
+ Uval := Scan_Raw_Long_Long_Unsigned (Str, Ptr, Max);
+
+ -- Deal with overflow cases, and also with maximum negative number
+
+ if Uval > Long_Long_Unsigned (Long_Long_Integer'Last) then
+ if Minus
+ and then Uval = Long_Long_Unsigned (-(Long_Long_Integer'First))
+ then
+ return Long_Long_Integer'First;
+ else
+ raise Constraint_Error;
+ end if;
+
+ -- Negative values
+
+ elsif Minus then
+ return -(Long_Long_Integer (Uval));
+
+ -- Positive values
+
+ else
+ return Long_Long_Integer (Uval);
+ end if;
+ end Scan_Long_Long_Integer;
+
+ -----------------------------
+ -- Value_Long_Long_Integer --
+ -----------------------------
+
+ function Value_Long_Long_Integer (Str : String) return Long_Long_Integer is
+ V : Long_Long_Integer;
+ P : aliased Integer := Str'First;
+ begin
+ V := Scan_Long_Long_Integer (Str, P'Access, Str'Last);
+ Scan_Trailing_Blanks (Str, P);
+ return V;
+ end Value_Long_Long_Integer;
+
+end System.Val_LLI;