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------------------------------------------------------------------------------

--                                                                          --

--                         GNAT RUN-TIME COMPONENTS                         --

--                                                                          --

--       A D A . C O M M A N D _ L I N E . R E S P O N S E _ F I L E        --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 2007-2009, 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.                                     --

--                                                                          --

-- As a special exception under Section 7 of GPL version 3, you are granted --

-- additional permissions described in the GCC Runtime Library Exception,   --

-- version 3.1, as published by the Free Software Foundation.               --

--                                                                          --

-- You should have received a copy of the GNU General Public License and    --

-- a copy of the GCC Runtime Library Exception along with this program;     --

-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --

-- <http://www.gnu.org/licenses/>.                                          --

--                                                                          --

-- GNAT was originally developed  by the GNAT team at  New York University. --

-- Extensive contributions were provided by Ada Core Technologies Inc.      --

--                                                                          --

------------------------------------------------------------------------------

--  This package is intended to be used in conjunction with its parent unit,

--  Ada.Command_Line. It provides facilities for getting command line arguments

--  from a text file, called a "response file".

--

--  Using a response file allow passing a set of arguments to an executable

--  longer than the maximum allowed by the system on the command line.

pragma Compiler_Unit;

with System.Strings;

package Ada.Command_Line.Response_File is

   subtype String_Access is System.Strings.String_Access;

   --  type String_Access is access all String;

   procedure Free (S : in out String_Access) renames System.Strings.Free;

   --  To deallocate a String

   subtype Argument_List is System.Strings.String_List;

   --  type String_List is array (Positive range <>) of String_Access;

   Max_Line_Length : constant := 4096;

   --  The maximum length of lines in a response file

   File_Does_Not_Exist : exception;

   --  Raise by Arguments_From when a response file cannot be found

   Line_Too_Long : exception;

   --  Raise by Arguments_From when a line in the response file is longer than

   --  Max_Line_Length.

   No_Closing_Quote : exception;

   --  Raise by Arguments_From when a quoted string does not end before the

   --  end of the line.

   Circularity_Detected : exception;

   --  Raise by Arguments_From when Recursive is True and the same response

   --  file is reading itself, either directly or indirectly.

   function Arguments_From

     (Response_File_Name        : String;

      Recursive                 : Boolean := False;

      Ignore_Non_Existing_Files : Boolean := False)

      return Argument_List;

   --  Read response file with name Response_File_Name and return the argument

   --  it contains as an Argument_List. It is the responsibility of the caller

   --  to deallocate the strings in the Argument_List if desired. When

   --  Recursive is True, any argument of the form @file_name indicates the

   --  name of another response file and is replaced by the arguments in this

   --  response file.

   --

   --  Each non empty line of the response file contains one or several

   --  arguments separated by white space. Empty lines or lines containing only

   --  white space are ignored. Arguments containing white space or a double

   --  quote ('"')must be quoted. A double quote inside a quote string is

   --  indicated by two consecutive double quotes. Example: "-Idir with quote

   --  "" and spaces" Non white space characters immediately before or after a

   --  quoted string are part of the same argument. Example -Idir" with "spaces

   --

   --  When a response file cannot be found, exception File_Does_Not_Exist is

   --  raised if Ignore_Non_Existing_Files is False, otherwise the response

   --  file is ignored. Exception Line_Too_Long is raised when a line of a

   --  response file is longer than Max_Line_Length. Exception No_Closing_Quote

   --  is raised when a quoted argument is not closed before the end of the

   --  line. Exception Circularity_Detected is raised when a Recursive is True

   --  and a response file is reading itself, either directly or indirectly.

end Ada.Command_Line.Response_File;