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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S W I T C H --
-- --
-- S p e c --
-- --
-- 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. --
-- --
------------------------------------------------------------------------------
-- This package together with a child package appropriate to the client
-- tool scans switches. Note that the body of the appropraite Usage package
-- must be coordinated with the switches that are recognized by this package.
-- These Usage packages also act as the official documentation for the
-- switches that are recognized. In addition, package Debug documents
-- the otherwise undocumented debug switches that are also recognized.
with Gnatvsn;
with Types; use Types;
package Switch is
-- Common switches for GNU tools
Version_Switch : constant String := "--version";
Help_Switch : constant String := "--help";
-----------------
-- Subprograms --
-----------------
type Procedure_Ptr is access procedure;
procedure Check_Version_And_Help
(Tool_Name : String;
Initial_Year : String;
Usage : Procedure_Ptr;
Version_String : String := Gnatvsn.Gnat_Version_String);
-- Check if switches --version or --help is used. If one of this switch
-- is used, issue the proper messages and end the process.
procedure Display_Version
(Tool_Name : String;
Initial_Year : String;
Version_String : String := Gnatvsn.Gnat_Version_String);
-- Display version of a tool when switch --version is used
function Is_Switch (Switch_Chars : String) return Boolean;
-- Returns True iff Switch_Chars is at least two characters long,
-- and the first character is an hyphen ('-').
function Is_Front_End_Switch (Switch_Chars : String) return Boolean;
-- Returns True iff Switch_Chars represents a front-end switch,
-- ie. it starts with -I, -gnat or -?RTS.
private
-- This section contains some common routines used by the tool dependent
-- child packages (there is one such child package for each tool that
-- uses Switches to scan switches - Compiler/gnatbind/gnatmake/.
Switch_Max_Value : constant := 999_999;
-- Maximum value permitted in switches that take a value
procedure Scan_Nat
(Switch_Chars : String;
Max : Integer;
Ptr : in out Integer;
Result : out Nat;
Switch : Character);
-- Scan natural integer parameter for switch. On entry, Ptr points
-- just past the switch character, on exit it points past the last
-- digit of the integer value.
procedure Scan_Pos
(Switch_Chars : String;
Max : Integer;
Ptr : in out Integer;
Result : out Pos;
Switch : Character);
-- Scan positive integer parameter for switch. On entry, Ptr points
-- just past the switch character, on exit it points past the last
-- digit of the integer value.
procedure Bad_Switch (Switch : Character);
procedure Bad_Switch (Switch : String);
-- Fail with an appropriate message when a switch is not recognized
end Switch;
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