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 --                                                                          --
  10 --              Copyright (C) 2001, Ada Core Technologies, Inc.             --
  11 --                                                                          --
  12 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  15 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  20 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- GNAT was originally developed  by the GNAT team at  New York University. --
  24 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  25 --                                                                          --
  26 ------------------------------------------------------------------------------
  27
  28 --  This package provides a set of routines to deal with file extensions
  29
  30 with Ada.Strings.Fixed;
  31 with MLib.Tgt;
  32
  33 package body MLib.Fil is
  34
  35    use Ada;
  36
  37    package Target renames MLib.Tgt;
  38
  39    ------------
  40    -- Ext_To --
  41    ------------
  42
  43    function Ext_To
  44      (Filename : String;
  45       New_Ext  : String := "")
  46       return     String
  47    is
  48       use Strings.Fixed;
  49       J : constant Natural :=
  50             Index (Source  =>  Filename,
  51                    Pattern => ".",
  52                    Going   => Strings.Backward);
  53
  54    begin
  55       if J = 0 then
  56          if New_Ext = "" then
  57             return Filename;
  58          else
  59             return Filename & "." & New_Ext;
  60          end if;
  61
  62       else
  63          if New_Ext = "" then
  64             return Head (Filename, J - 1);
  65          else
  66             return Head (Filename, J - 1) & '.' & New_Ext;
  67          end if;
  68       end if;
  69    end Ext_To;
  70
  71    -------------
  72    -- Get_Ext --
  73    -------------
  74
  75    function Get_Ext (Filename : in String) return String is
  76       use Strings.Fixed;
  77
  78       J : constant Natural :=
  79             Index (Source  =>  Filename,
  80                    Pattern => ".",
  81                    Going   => Strings.Backward);
  82
  83    begin
  84       if J = 0 then
  85          return "";
  86       else
  87          return Filename (J .. Filename'Last);
  88       end if;
  89    end Get_Ext;
  90
  91    ----------------
  92    -- Is_Archive --
  93    ----------------
  94
  95    function Is_Archive (Filename : String) return Boolean is
  96       Ext : constant String := Get_Ext (Filename);
  97
  98    begin
  99       return Target.Is_Archive_Ext (Ext);
 100    end Is_Archive;
 101
 102    ----------
 103    -- Is_C --
 104    ----------
 105
 106    function Is_C (Filename : in String) return Boolean is
 107       Ext : constant String := Get_Ext (Filename);
 108
 109    begin
 110       return Target.Is_C_Ext (Ext);
 111    end Is_C;
 112
 113    ------------
 114    -- Is_Obj --
 115    ------------
 116
 117    function Is_Obj (Filename : in String) return Boolean is
 118       Ext : constant String := Get_Ext (Filename);
 119
 120    begin
 121       return Target.Is_Object_Ext (Ext);
 122    end Is_Obj;
 123
 124 end MLib.Fil;