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 --                     Copyright (C) 2001-2006, AdaCore                     --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- GNAT was originally developed  by the GNAT team at  New York University. --
  23 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  24 --                                                                          --
  25 ------------------------------------------------------------------------------
  26
  27 --  This package provides a set of routines to deal with file extensions
  28
  29 with Ada.Strings.Fixed;
  30 with MLib.Tgt;
  31
  32 package body MLib.Fil is
  33
  34    use Ada;
  35
  36    package Target renames MLib.Tgt;
  37
  38    ------------
  39    -- Ext_To --
  40    ------------
  41
  42    function Ext_To
  43      (Filename : String;
  44       New_Ext  : String := "")
  45       return     String
  46    is
  47       use Strings.Fixed;
  48
  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 : 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    begin
  98       return Target.Is_Archive_Ext (Ext);
  99    end Is_Archive;
 100
 101    ----------
 102    -- Is_C --
 103    ----------
 104
 105    function Is_C (Filename : String) return Boolean is
 106       Ext : constant String := Get_Ext (Filename);
 107    begin
 108       return Target.Is_C_Ext (Ext);
 109    end Is_C;
 110
 111    ------------
 112    -- Is_Obj --
 113    ------------
 114
 115    function Is_Obj (Filename : String) return Boolean is
 116       Ext : constant String := Get_Ext (Filename);
 117    begin
 118       return Target.Is_Object_Ext (Ext);
 119    end Is_Obj;
 120
 121 end MLib.Fil;