| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- S W I T C H -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 1992-2003 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, 59 Temple Place - Suite 330, Boston, -- |
| -- MA 02111-1307, 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/. |
| |
| Bad_Switch : exception; |
| -- Exception raised if bad switch encountered |
| |
| Bad_Switch_Value : exception; |
| -- Exception raised if bad switch value encountered |
| |
| Missing_Switch_Value : exception; |
| -- Exception raised if no switch value encountered |
| |
| Too_Many_Output_Files : exception; |
| -- Exception raised if the -o switch is encountered more than once |
| |
| 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); |
| -- 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); |
| -- 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. |
| |
| end Switch; |
