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- ------------------------------------------------------------------------------
- -- --
- -- GNAT COMPILER COMPONENTS --
- -- --
- -- S Y S T E M . V A L _ L L I --
- -- --
- -- S p e c --
- -- --
- -- $Revision: 1.6 $ --
- -- --
- -- Copyright (c) 1992,1993,1994 NYU, All Rights Reserved --
- -- --
- -- The GNAT library is free software; you can redistribute it and/or modify --
- -- it under terms of the GNU Library General Public License as published by --
- -- the Free Software Foundation; either version 2, or (at your option) any --
- -- later version. The GNAT library is distributed in the hope that it will --
- -- be useful, but WITHOUT ANY WARRANTY; without even the implied warranty --
- -- of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
- -- Library General Public License for more details. You should have --
- -- received a copy of the GNU Library General Public License along with --
- -- the GNAT library; see the file COPYING.LIB. If not, write to the Free --
- -- Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. --
- -- --
- ------------------------------------------------------------------------------
-
- 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
-
- ---------------------------
- -- Scn_Long_Long_Integer --
- ---------------------------
-
- function Scan_Long_Long_Integer
- (Str : String;
- Ptr : access Positive'Base;
- Max : Positive'Base)
- 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);
- Uval := Scan_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 Natural := 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;
-