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

--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                             F N A M E . U F                              --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 1992-2007, 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.      --

--                                                                          --

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

--  This child package contains the routines to translate a unit name to

--  a file name taking into account Source_File_Name pragmas. It also

--  contains the auxiliary routines used to record data from the pragmas.

--  Note: the reason we split this into a child unit is that the routines

--  for unit name translation have a significant number of additional

--  dependencies, including osint, and hence sdefault. There are a number

--  of tools that use utility subprograms in the Fname parent, but do not

--  need the functionality in this child package (and certainly do not want

--  to deal with the extra dependencies).

with Casing; use Casing;

with Types;  use Types;

package Fname.UF is

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

   -- 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 Get_File_Name

     (Uname    : Unit_Name_Type;

      Subunit  : Boolean;

      May_Fail : Boolean := False) return File_Name_Type;

   --  This function returns the file name that corresponds to a given unit

   --  name, Uname. The Subunit parameter is set True for subunits, and false

   --  for all other kinds of units. The caller must ensure that the unit name

   --  meets the requirements given in package Uname.

   --

   --  When May_Fail is True, if the file cannot be found, this function

   --  returns No_File. When it is False, if the file cannot be found,

   --  a file name compatible with one pattern Source_File_Name pragma is

   --  returned.

   function Get_Unit_Index (Uname : Unit_Name_Type) return Nat;

   --  If there is a specific Source_File_Name pragma for this unit, then

   --  return the corresponding unit index value. Return 0 if no index given.

   procedure Initialize;

   --  Initialize internal tables. This is called automatically when the

   --  package body is elaborated, so an explicit call to Initialize is

   --  only required if it is necessary to reinitialize the source file

   --  name pragma tables.

   procedure Lock;

   --  Lock tables before calling back end

   function File_Name_Of_Spec (Name : Name_Id) return File_Name_Type;

   --  Returns the file name that corresponds to the spec of a given unit

   --  name. The unit name here is not encoded as a Unit_Name_Type, but is

   --  rather just a normal form name in lower case, e.g. "xyz.def".

   function File_Name_Of_Body (Name : Name_Id) return File_Name_Type;

   --  Returns the file name that corresponds to the body of a given unit

   --  name. The unit name here is not encoded as a Unit_Name_Type, but is

   --  rather just a normal form name in lower case, e.g. "xyz.def".

   procedure Set_File_Name

     (U     : Unit_Name_Type;

      F     : File_Name_Type;

      Index : Nat);

   --  Make association between given unit name, U, and the given file name,

   --  F. This is the routine called to process a Source_File_Name pragma.

   --  Index is the value from the index parameter of the pragma if present

   --  and zero if no index parameter is present.

   procedure Set_File_Name_Pattern

     (Pat : String_Ptr;

      Typ : Character;

      Dot : String_Ptr;

      Cas : Casing_Type);

   --  This is called to process a Source_File_Name pragma whose first

   --  argument is a file name pattern string.  Pat is this pattern string,

   --  which contains an asterisk to correspond to the unit. Typ is one of

   --  'b'/'s'/'u' for body/spec/subunit, Dot is the separator string

   --  for child/subunit names, and Cas is one of Lower/Upper/Mixed

   --  indicating the required case for the file name.

end Fname.UF;