+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- S Y S T E M . V A L _ I N T --
--- --
--- B o d y --
--- --
--- $Revision: 1.1.16.2 $
--- --
--- Copyright (C) 1992,1993,1994,1995,1996 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 2, 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. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
--- --
--- 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_Uns; use System.Val_Uns;
-with System.Val_Util; use System.Val_Util;
-
-package body System.Val_Int is
-
- ------------------
- -- Scan_Integer --
- ------------------
-
- function Scan_Integer
- (Str : String;
- Ptr : access Integer;
- Max : Integer)
- return Integer
- is
- Uval : 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_Unsigned (Str, Ptr, Max);
-
- -- Deal with overflow cases, and also with maximum negative number
-
- if Uval > Unsigned (Integer'Last) then
- if Minus and then Uval = Unsigned (-(Integer'First)) then
- return Integer'First;
- else
- raise Constraint_Error;
- end if;
-
- -- Negative values
-
- elsif Minus then
- return -(Integer (Uval));
-
- -- Positive values
-
- else
- return Integer (Uval);
- end if;
-
- end Scan_Integer;
-
- -------------------
- -- Value_Integer --
- -------------------
-
- function Value_Integer (Str : String) return Integer is
- V : Integer;
- P : aliased Integer := Str'First;
-
- begin
- V := Scan_Integer (Str, P'Access, Str'Last);
- Scan_Trailing_Blanks (Str, P);
- return V;
- end Value_Integer;
-
-end System.Val_Int;
projects / msp430-gcc.git / blobdiff