------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                                F N A M E                                 --
--                                                                          --
--                                 S p e c                                  --
--                                                                          --
--          Copyright (C) 1992-2000 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.                                                      --
--                                                                          --
-- 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.      --
--                                                                          --
------------------------------------------------------------------------------

--  This package, together with its child package Fname.UF define the
--  association between source file names and unit names as defined
--  (see package Uname for definition of format of unit names).

with Types; use Types;

package Fname is

   --  Note: this package spec does not depend on the Uname spec in the Ada
   --  sense, but the comments and description of the semantics do depend on
   --  the conventions established by Uname.

   ---------------------------
   -- File Name Conventions --
   ---------------------------

   --  GNAT requires that there be a one to one correspondence between source
   --  file names (as used in the Osint package interface) and unit names as
   --  defined by the Uname package. This correspondence is defined by the
   --  two subprograms defined here in the Fname package.

   --   For full rules of file naming, see GNAT User's Guide. Note that the
   --   naming rules are affected by the presence of Source_File_Name pragmas
   --   that have been previously processed.

   --  Note that the file name does *not* include the directory name. The
   --  management of directories is provided by Osint, and full file names
   --  are used only for error message purposes within GNAT itself.

   -----------------
   -- Subprograms --
   -----------------

   type Expected_Unit_Type is (Expect_Body, Expect_Spec, Unknown);
   --  Return value from Get_Expected_Unit_Type

   function Get_Expected_Unit_Type
     (Fname : File_Name_Type)
      return  Expected_Unit_Type;
   --  If possible, determine whether the given file name corresponds to a unit
   --  that is a spec or body (e.g. by examining the extension). If this cannot
   --  be determined with the file naming conventions in use, then the returned
   --  value is set to Unknown.

   function Is_Predefined_File_Name
     (Fname              : File_Name_Type;
      Renamings_Included : Boolean := True)
      return               Boolean;
   --  This function determines if the given file name (which must be a simple
   --  file name with no directory information) is the file name for one of
   --  the predefined library units. On return, Name_Buffer contains the
   --  file name. The Renamings_Included parameter indicates whether annex
   --  J renamings such as Text_IO are to be considered as predefined. If
   --  Renamings_Included is True, then Text_IO will return True, otherwise
   --  only children of Ada, Interfaces and System return True.

   function Is_Internal_File_Name
     (Fname              : File_Name_Type;
      Renamings_Included : Boolean := True)
      return               Boolean;
   --  Similar to Is_Predefined_File_Name. The internal file set is a
   --  superset of the predefined file set including children of GNAT,
   --  and also children of DEC for the VMS case.

   procedure Tree_Read;
   --  Dummy procedure (reads dummy table values from tree file)

   procedure Tree_Write;
   --  Writes out internal tables to current tree file using Tree_Write
   --  This is actually a dummy routine, since the relevant table is
   --  no longer used, but we retain it for now, to avoid a tree file
   --  incompatibility with the 3.13 compiler. Should be removed for
   --  the 3.14a release ???

end Fname;
