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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT COMPILER COMPONENTS                         --
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--                                                                          --
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--                             M L I B . F I L                              --
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--                                                                          --
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--                                 B o d y                                  --
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--                                                                          --
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--                     Copyright (C) 2001-2007, AdaCore                     --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
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-- for  more details.  You should have  received  a copy of the GNU General --
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-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
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-- http://www.gnu.org/licenses for a complete copy of the license.          --
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--                                                                          --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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--  This package provides a set of routines to deal with file extensions
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with Ada.Strings.Fixed;
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with MLib.Tgt;
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package body MLib.Fil is
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   use Ada;
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   package Target renames MLib.Tgt;
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   ---------------
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   -- Append_To --
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   ---------------
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   function Append_To
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     (Filename : String;
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      Ext      : String) return String
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   is
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   begin
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      if Ext'Length = 0 then
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         return Filename;
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      elsif Filename (Filename'Last) = '.' then
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         if Ext (Ext'First) = '.' then
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            return Filename & Ext (Ext'First + 1 .. Ext'Last);
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         else
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            return Filename & Ext;
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         end if;
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      else
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         if Ext (Ext'First) = '.' then
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            return Filename & Ext;
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         else
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            return Filename & '.' & Ext;
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         end if;
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      end if;
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   end Append_To;
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   ------------
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   -- Ext_To --
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   ------------
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   function Ext_To
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     (Filename : String;
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      New_Ext  : String := "") return String
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   is
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      use Strings.Fixed;
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      J : constant Natural :=
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            Index (Source  =>  Filename,
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                   Pattern => ".",
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                   Going   => Strings.Backward);
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   begin
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      if J = 0 then
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         if New_Ext = "" then
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            return Filename;
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         else
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            return Filename & "." & New_Ext;
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         end if;
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      else
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         if New_Ext = "" then
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            return Head (Filename, J - 1);
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         else
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            return Head (Filename, J - 1) & '.' & New_Ext;
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         end if;
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      end if;
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   end Ext_To;
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   -------------
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   -- Get_Ext --
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   -------------
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   function Get_Ext (Filename : String) return String is
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      use Strings.Fixed;
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      J : constant Natural :=
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            Index (Source  =>  Filename,
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                   Pattern => ".",
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                   Going   => Strings.Backward);
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   begin
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      if J = 0 then
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         return "";
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      else
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         return Filename (J .. Filename'Last);
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      end if;
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   end Get_Ext;
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   ----------------
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   -- Is_Archive --
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   ----------------
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   function Is_Archive (Filename : String) return Boolean is
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      Ext : constant String := Get_Ext (Filename);
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   begin
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      return Target.Is_Archive_Ext (Ext);
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   end Is_Archive;
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   ----------
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   -- Is_C --
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   ----------
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   function Is_C (Filename : String) return Boolean is
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      Ext : constant String := Get_Ext (Filename);
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   begin
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      return Target.Is_C_Ext (Ext);
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   end Is_C;
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   ------------
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   -- Is_Obj --
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   ------------
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   function Is_Obj (Filename : String) return Boolean is
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      Ext : constant String := Get_Ext (Filename);
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   begin
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      return Target.Is_Object_Ext (Ext);
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   end Is_Obj;
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end MLib.Fil;

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