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, Ada Core Technologies, Inc.             --
  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       J : constant Natural :=
  49             Index (Source  =>  Filename,
  50                    Pattern => ".",
  51                    Going   => Strings.Backward);
  52
  53    begin
  54       if J = 0 then
  55          if New_Ext = "" then
  56             return Filename;
  57          else
  58             return Filename & "." & New_Ext;
  59          end if;
  60
  61       else
  62          if New_Ext = "" then
  63             return Head (Filename, J - 1);
  64          else
  65             return Head (Filename, J - 1) & '.' & New_Ext;
  66          end if;
  67       end if;
  68    end Ext_To;
  69
  70    -------------
  71    -- Get_Ext --
  72    -------------
  73
  74    function Get_Ext (Filename : in String) return String is
  75       use Strings.Fixed;
  76
  77       J : constant Natural :=
  78             Index (Source  =>  Filename,
  79                    Pattern => ".",
  80                    Going   => Strings.Backward);
  81
  82    begin
  83       if J = 0 then
  84          return "";
  85       else
  86          return Filename (J .. Filename'Last);
  87       end if;
  88    end Get_Ext;
  89
  90    ----------------
  91    -- Is_Archive --
  92    ----------------
  93
  94    function Is_Archive (Filename : String) return Boolean is
  95       Ext : constant String := Get_Ext (Filename);
  96
  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 : in String) return Boolean is
 106       Ext : constant String := Get_Ext (Filename);
 107
 108    begin
 109       return Target.Is_C_Ext (Ext);
 110    end Is_C;
 111
 112    ------------
 113    -- Is_Obj --
 114    ------------
 115
 116    function Is_Obj (Filename : in String) return Boolean is
 117       Ext : constant String := Get_Ext (Filename);
 118
 119    begin
 120       return Target.Is_Object_Ext (Ext);
 121    end Is_Obj;
 122
 123 end MLib.Fil;