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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S W I T C H --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2005 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, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- 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 Types; use Types;
package Switch is
-- Note: The default switch character is indicated by Switch_Character,
-- but regardless of what it is, a hyphen is always allowed as an
-- (alternative) switch character.
-- Note: In GNAT, the case of switches is not significant if
-- Switches_Case_Sensitive is False. If this is the case, switch
-- characters, or letters appearing in the parameter to a switch, may be
-- either upper case or lower case.
-----------------
-- Subprograms --
-----------------
function Is_Switch (Switch_Chars : String) return Boolean;
-- Returns True iff Switch_Chars is at least two characters long,
-- and the first character indicates it is a switch.
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 or -gnat.
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);
-- Fail with an appropriate message when a switch is not recognized
end Switch;
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