gcc/ada/mlib-fil.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                            M L I B . F I L                               --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.2 $
  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 -- GNAT was originally developed  by the GNAT team at  New York University. --
  25 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  26 --                                                                          --
  27 ------------------------------------------------------------------------------
  28
  29 --  This package provides a set of routines to deal with file extensions
  30
  31 with Ada.Strings.Fixed;
  32 with MLib.Tgt;
  33
  34 package body MLib.Fil is
  35
  36    use Ada;
  37
  38    package Target renames MLib.Tgt;
  39
  40    ------------
  41    -- Ext_To --
  42    ------------
  43
  44    function Ext_To
  45      (Filename : String;
  46       New_Ext  : String := "")
  47       return     String
  48    is
  49       use Strings.Fixed;
  50       J : constant Natural :=
  51             Index (Source  =>  Filename,
  52                    Pattern => ".",
  53                    Going   => Strings.Backward);
  54
  55    begin
  56       if J = 0 then
  57          if New_Ext = "" then
  58             return Filename;
  59          else
  60             return Filename & "." & New_Ext;
  61          end if;
  62
  63       else
  64          if New_Ext = "" then
  65             return Head (Filename, J - 1);
  66          else
  67             return Head (Filename, J - 1) & '.' & New_Ext;
  68          end if;
  69       end if;
  70    end Ext_To;
  71
  72    -------------
  73    -- Get_Ext --
  74    -------------
  75
  76    function Get_Ext (Filename : in String) return String is
  77       use Strings.Fixed;
  78
  79       J : constant Natural :=
  80             Index (Source  =>  Filename,
  81                    Pattern => ".",
  82                    Going   => Strings.Backward);
  83
  84    begin
  85       if J = 0 then
  86          return "";
  87       else
  88          return Filename (J .. Filename'Last);
  89       end if;
  90    end Get_Ext;
  91
  92    ----------------
  93    -- Is_Archive --
  94    ----------------
  95
  96    function Is_Archive (Filename : String) return Boolean is
  97       Ext : constant String := Get_Ext (Filename);
  98
  99    begin
 100       return Target.Is_Archive_Ext (Ext);
 101    end Is_Archive;
 102
 103    ----------
 104    -- Is_C --
 105    ----------
 106
 107    function Is_C (Filename : in String) return Boolean is
 108       Ext : constant String := Get_Ext (Filename);
 109
 110    begin
 111       return Target.Is_C_Ext (Ext);
 112    end Is_C;
 113
 114    ------------
 115    -- Is_Obj --
 116    ------------
 117
 118    function Is_Obj (Filename : in String) return Boolean is
 119       Ext : constant String := Get_Ext (Filename);
 120
 121    begin
 122       return Target.Is_Object_Ext (Ext);
 123    end Is_Obj;
 124
 125 end MLib.Fil;