1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2005, 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, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, 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 ------------------------------------------------------------------------------
29 package body Switch is
35 procedure Bad_Switch (Switch : Character) is
37 Osint.Fail ("invalid switch: ", (1 => Switch));
40 procedure Bad_Switch (Switch : String) is
42 Osint.Fail ("invalid switch: ", Switch);
45 -------------------------
46 -- Is_Front_End_Switch --
47 -------------------------
49 function Is_Front_End_Switch (Switch_Chars : String) return Boolean is
50 Ptr : constant Positive := Switch_Chars'First;
52 return Is_Switch (Switch_Chars)
54 (Switch_Chars (Ptr + 1) = 'I'
55 or else (Switch_Chars'Length >= 5
56 and then Switch_Chars (Ptr + 1 .. Ptr + 4) = "gnat")
57 or else (Switch_Chars'Length >= 5
58 and then Switch_Chars (Ptr + 2 .. Ptr + 4) = "RTS"));
59 end Is_Front_End_Switch;
65 function Is_Switch (Switch_Chars : String) return Boolean is
67 return Switch_Chars'Length > 1
68 and then Switch_Chars (Switch_Chars'First) = '-';
76 (Switch_Chars : String;
85 if Ptr > Max or else Switch_Chars (Ptr) not in '0' .. '9' then
86 Osint.Fail ("missing numeric value for switch: ", (1 => Switch));
89 while Ptr <= Max and then Switch_Chars (Ptr) in '0' .. '9' loop
90 Result := Result * 10 +
91 Character'Pos (Switch_Chars (Ptr)) - Character'Pos ('0');
94 if Result > Switch_Max_Value then
96 ("numeric value out of range for switch: ", (1 => Switch));
107 (Switch_Chars : String;
109 Ptr : in out Integer;
116 Scan_Nat (Switch_Chars, Max, Ptr, Temp, Switch);
119 Osint.Fail ("numeric value out of range for switch: ", (1 => Switch));