gcc/ada/g-diopit.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --  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   --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                            $Revision$
  10 --                                                                          --
  11 --            Copyright (C) 2001 Ada Core Technologies, Inc.                --
  12 --                                                                          --
  13 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- As a special exception,  if other files  instantiate  generics from this --
  25 -- unit, or you link  this unit with other files  to produce an executable, --
  26 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  27 -- covered  by the  GNU  General  Public  License.  This exception does not --
  28 -- however invalidate  any other reasons why  the executable file  might be --
  29 -- covered by the  GNU Public License.                                      --
  30 --                                                                          --
  31 -- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com).   --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  Iterators among files
  36
  37 package GNAT.Directory_Operations.Iteration is
  38
  39    generic
  40       with procedure Action
  41         (Item  :        String;
  42          Index :        Positive;
  43          Quit  : in out Boolean);
  44    procedure Find
  45      (Root_Directory : Dir_Name_Str;
  46       File_Pattern   : String);
  47    --  Recursively searches the directory structure rooted at Root_Directory.
  48    --  This provides functionality similar to the UNIX 'find' command.
  49    --  Action will be called for every item matching the regular expression
  50    --  File_Pattern (see GNAT.Regexp). Item is the full pathname to the file
  51    --  starting with Root_Directory that has been matched. Index is set to one
  52    --  for the first call and is incremented by one at each call. The iterator
  53    --  will pass in the value False on each call to Action. The iterator will
  54    --  terminate after passing the last matched path to Action or after
  55    --  returning from a call to Action which sets Quit to True.
  56    --  Raises GNAT.Regexp.Error_In_Regexp if File_Pattern is ill formed.
  57
  58    generic
  59       with procedure Action
  60         (Item  :        String;
  61          Index :        Positive;
  62          Quit  : in out Boolean);
  63    procedure Wildcard_Iterator (Path : Path_Name);
  64    --  Calls Action for each path matching Path. Path can include wildcards '*'
  65    --  and '?' and [...]. The rules are:
  66    --
  67    --     *       can be replaced by any sequence of characters
  68    --     ?       can be replaced by a single character
  69    --     [a-z]   match one character in the range 'a' through 'z'
  70    --     [abc]   match either character 'a', 'b' or 'c'
  71    --
  72    --  Item is the filename that has been matched. Index is set to one for the
  73    --  first call and is incremented by one at each call. The iterator's
  74    --  termination can be controlled by setting Quit to True. It is by default
  75    --  set to False.
  76    --
  77    --  For example, if we have the following directory structure:
  78    --     /boo/
  79    --        foo.ads
  80    --     /sed/
  81    --        foo.ads
  82    --        file/
  83    --          foo.ads
  84    --     /sid/
  85    --        foo.ads
  86    --        file/
  87    --          foo.ads
  88    --     /life/
  89    --
  90    --  A call with expression "/s*/file/*" will call Action for the following
  91    --  items:
  92    --     /sed/file/foo.ads
  93    --     /sid/file/foo.ads
  94
  95 end GNAT.Directory_Operations.Iteration;