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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S W I T C H --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2007, 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 3, 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 COPYING3. If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Osint; use Osint;
with Output; use Output;
package body Switch is
----------------
-- Bad_Switch --
----------------
procedure Bad_Switch (Switch : Character) is
begin
Osint.Fail ("invalid switch: ", (1 => Switch));
end Bad_Switch;
procedure Bad_Switch (Switch : String) is
begin
Osint.Fail ("invalid switch: ", Switch);
end Bad_Switch;
----------------------------
-- Check_Version_And_Help --
----------------------------
procedure Check_Version_And_Help
(Tool_Name : String;
Initial_Year : String;
Usage : Procedure_Ptr;
Version_String : String := Gnatvsn.Gnat_Version_String)
is
Version_Switch_Present : Boolean := False;
Help_Switch_Present : Boolean := False;
Next_Arg : Natural;
begin
-- First check for --version or --help
Next_Arg := 1;
while Next_Arg < Arg_Count loop
declare
Next_Argv : String (1 .. Len_Arg (Next_Arg));
begin
Fill_Arg (Next_Argv'Address, Next_Arg);
if Next_Argv = Version_Switch then
Version_Switch_Present := True;
elsif Next_Argv = Help_Switch then
Help_Switch_Present := True;
end if;
Next_Arg := Next_Arg + 1;
end;
end loop;
-- If --version was used, display version and exit
if Version_Switch_Present then
Set_Standard_Output;
Display_Version (Tool_Name, Initial_Year, Version_String);
Write_Str (Gnatvsn.Gnat_Free_Software);
Write_Eol;
Write_Eol;
Exit_Program (E_Success);
end if;
-- If --help was used, display help and exit
if Help_Switch_Present then
Set_Standard_Output;
Usage.all;
Write_Eol;
Write_Line ("Report bugs to report@adacore.com");
Exit_Program (E_Success);
end if;
end Check_Version_And_Help;
---------------------
-- Display_Version --
---------------------
procedure Display_Version
(Tool_Name : String;
Initial_Year : String;
Version_String : String := Gnatvsn.Gnat_Version_String)
is
begin
Write_Str (Tool_Name);
Write_Char (' ');
Write_Str (Version_String);
Write_Eol;
Write_Str ("Copyright (C) ");
Write_Str (Initial_Year);
Write_Char ('-');
Write_Str (Gnatvsn.Current_Year);
Write_Str (", ");
Write_Str (Gnatvsn.Copyright_Holder);
Write_Eol;
end Display_Version;
-------------------------
-- 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;
Switch : Character)
is
begin
Result := 0;
if Ptr > Max or else Switch_Chars (Ptr) not in '0' .. '9' then
Osint.Fail ("missing numeric value for switch: ", (1 => Switch));
else
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
Osint.Fail
("numeric value out of range for switch: ", (1 => Switch));
end if;
end loop;
end if;
end Scan_Nat;
--------------
-- Scan_Pos --
--------------
procedure Scan_Pos
(Switch_Chars : String;
Max : Integer;
Ptr : in out Integer;
Result : out Pos;
Switch : Character)
is
Temp : Nat;
begin
Scan_Nat (Switch_Chars, Max, Ptr, Temp, Switch);
if Temp = 0 then
Osint.Fail ("numeric value out of range for switch: ", (1 => Switch));
end if;
Result := Temp;
end Scan_Pos;
end Switch;
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