------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- S W I T C H -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2004, 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. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ package body Switch is ------------------------- -- Is_Front_End_Switch -- ------------------------- function Is_Front_End_Switch (Switch_Chars : String) return Boolean is Ptr : constant Positive := Switch_Chars'First; begin return Is_Switch (Switch_Chars) and then (Switch_Chars (Ptr + 1) = 'I' or else (Switch_Chars'Length >= 5 and then Switch_Chars (Ptr + 1 .. Ptr + 4) = "gnat") or else (Switch_Chars'Length >= 5 and then Switch_Chars (Ptr + 2 .. Ptr + 4) = "RTS")); end Is_Front_End_Switch; --------------- -- Is_Switch -- --------------- function Is_Switch (Switch_Chars : String) return Boolean is begin return Switch_Chars'Length > 1 and then Switch_Chars (Switch_Chars'First) = '-'; end Is_Switch; ------------------------ -------------- -- Scan_Nat -- -------------- procedure Scan_Nat (Switch_Chars : String; Max : Integer; Ptr : in out Integer; Result : out Nat) is begin Result := 0; if Ptr > Max or else Switch_Chars (Ptr) not in '0' .. '9' then raise Missing_Switch_Value; end if; while Ptr <= Max and then Switch_Chars (Ptr) in '0' .. '9' loop Result := Result * 10 + Character'Pos (Switch_Chars (Ptr)) - Character'Pos ('0'); Ptr := Ptr + 1; if Result > Switch_Max_Value then raise Bad_Switch_Value; end if; end loop; end Scan_Nat; -------------- -- Scan_Pos -- -------------- procedure Scan_Pos (Switch_Chars : String; Max : Integer; Ptr : in out Integer; Result : out Pos) is Temp : Nat; begin Scan_Nat (Switch_Chars, Max, Ptr, Temp); if Temp = 0 then raise Bad_Switch_Value; end if; Result := Temp; end Scan_Pos; end Switch;