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--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--  G N A T . D I R E C T O R Y _ O P E R A T I O N S . I T E R A T I O N   --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--                     Copyright (C) 2001-2005, AdaCore                     --

--                                                                          --

-- 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.                                              --

--                                                                          --

-- As a special exception,  if other files  instantiate  generics from this --

-- unit, or you link  this unit with other files  to produce an executable, --

-- this  unit  does not  by itself cause  the resulting  executable  to  be --

-- covered  by the  GNU  General  Public  License.  This exception does not --

-- however invalidate  any other reasons why  the executable file  might be --

-- covered by the  GNU Public License.                                      --

--                                                                          --

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

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

--                                                                          --

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--  Iterators among files

package GNAT.Directory_Operations.Iteration is

   generic

      with procedure Action

        (Item  :        String;

         Index :        Positive;

         Quit  : in out Boolean);

   procedure Find

     (Root_Directory : Dir_Name_Str;

      File_Pattern   : String);

   --  Recursively searches the directory structure rooted at Root_Directory.

   --  This provides functionality similar to the UNIX 'find' command.

   --  Action will be called for every item matching the regular expression

   --  File_Pattern (see GNAT.Regexp). Item is the full pathname to the file

   --  starting with Root_Directory that has been matched. Index is set to one

   --  for the first call and is incremented by one at each call. The iterator

   --  will pass in the value False on each call to Action. The iterator will

   --  terminate after passing the last matched path to Action or after

   --  returning from a call to Action which sets Quit to True.

   --  Raises GNAT.Regexp.Error_In_Regexp if File_Pattern is ill formed.

   generic

      with procedure Action

        (Item  :        String;

         Index :        Positive;

         Quit  : in out Boolean);

   procedure Wildcard_Iterator (Path : Path_Name);

   --  Calls Action for each path matching Path. Path can include wildcards '*'

   --  and '?' and [...]. The rules are:

   --

   --     *       can be replaced by any sequence of characters

   --     ?       can be replaced by a single character

   --     [a-z]   match one character in the range 'a' through 'z'

   --     [abc]   match either character 'a', 'b' or 'c'

   --

   --  Item is the filename that has been matched. Index is set to one for the

   --  first call and is incremented by one at each call. The iterator's

   --  termination can be controlled by setting Quit to True. It is by default

   --  set to False.

   --

   --  For example, if we have the following directory structure:

   --     /boo/

   --        foo.ads

   --     /sed/

   --        foo.ads

   --        file/

   --          foo.ads

   --     /sid/

   --        foo.ads

   --        file/

   --          foo.ads

   --     /life/

   --

   --  A call with expression "/s*/file/*" will call Action for the following

   --  items:

   --     /sed/file/foo.ads

   --     /sid/file/foo.ads

end GNAT.Directory_Operations.Iteration;