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--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                                 F M A P                                  --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 2001-2009, 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.  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 COPYING3.  If not, go to --

-- http://www.gnu.org/licenses for a complete copy of the 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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--  This package keeps two mappings: from unit names to file names,

--  and from file names to path names.

--

--  This mapping is used to communicate between the builder (gnatmake or

--  gprbuild) and the compiler. The format of this mapping file is the

--  following:

--  For each source file, there are three lines in the mapping file:

--    Unit name with %b or %s added depending on whether it is a body or a spec

--              This line is omitted for file-based languages

--    File name

--    Path name (set to '/' if the file should be ignored in fact, ie for

--               a Locally_Removed_File in a project)

with Namet; use Namet;

package Fmap is

   procedure Initialize (File_Name : String);

   --  Initialize the mappings from the mapping file File_Name.

   --  If the mapping file is incorrect (non existent file, truncated file,

   --  duplicate entries), output a warning and do not initialize the mappings.

   --  Record the state of the mapping tables in case Update is called

   --  later on.

   function Mapped_Path_Name (File : File_Name_Type) return File_Name_Type;

   --  Return the path name mapped to the file name File.

   --  Return No_File if File is not mapped.

   function Mapped_File_Name (Unit : Unit_Name_Type) return File_Name_Type;

   --  Return the file name mapped to the unit name Unit.

   --  Return No_File if Unit is not mapped.

   --  Return Error_Name if it is forbidden.

   procedure Add_To_File_Map

     (Unit_Name : Unit_Name_Type;

      File_Name : File_Name_Type;

      Path_Name : File_Name_Type);

   --  Add mapping of Unit_Name to File_Name and of File_Name to Path_Name

   procedure Update_Mapping_File (File_Name : String);

   --  If Add_To_File_Map has been called (after Initialize or any time

   --  if Initialize has not been called), append the new entries to the

   --  mapping file whose file name is File_Name.

   procedure Reset_Tables;

   --  Initialize all the internal data structures. This procedure is used

   --  when several compilations are performed by the same process (by GNSA

   --  for ASIS, for example) to remove any existing mappings from a previous

   --  compilation.

   procedure Add_Forbidden_File_Name (Name : File_Name_Type);

   --  Indicate that a source file name is forbidden. This is used when there

   --  are excluded sources in projects (attributes Excluded_Source_Files or

   --  Locally_Removed_Files).

end Fmap;