1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2002, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 package body Switch
is
29 -------------------------
30 -- Is_Front_End_Switch --
31 -------------------------
33 function Is_Front_End_Switch
(Switch_Chars
: String) return Boolean is
34 Ptr
: constant Positive := Switch_Chars
'First;
37 return Is_Switch
(Switch_Chars
)
39 (Switch_Chars
(Ptr
+ 1) = 'I'
40 or else (Switch_Chars
'Length >= 5
41 and then Switch_Chars
(Ptr
+ 1 .. Ptr
+ 4) = "gnat")
42 or else (Switch_Chars
'Length >= 5
43 and then Switch_Chars
(Ptr
+ 1 .. Ptr
+ 4) = "fRTS"));
44 end Is_Front_End_Switch
;
50 function Is_Switch
(Switch_Chars
: String) return Boolean is
52 return Switch_Chars
'Length > 1
53 and then Switch_Chars
(Switch_Chars
'First) = '-';
56 ------------------------
62 (Switch_Chars
: String;
70 if Ptr
> Max
or else Switch_Chars
(Ptr
) not in '0' .. '9' then
71 raise Missing_Switch_Value
;
74 while Ptr
<= Max
and then Switch_Chars
(Ptr
) in '0' .. '9' loop
75 Result
:= Result
* 10 +
76 Character'Pos (Switch_Chars
(Ptr
)) - Character'Pos ('0');
79 if Result
> Switch_Max_Value
then
80 raise Bad_Switch_Value
;
90 (Switch_Chars
: String;
98 Scan_Nat
(Switch_Chars
, Max
, Ptr
, Temp
);
101 raise Bad_Switch_Value
;