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) 2001-2007, 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 3,  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 COPYING3.  If not, go to --
19-- http://www.gnu.org/licenses for a complete copy of the license.          --
20--                                                                          --
21-- GNAT was originally developed  by the GNAT team at  New York University. --
22-- Extensive contributions were provided by Ada Core Technologies Inc.      --
23--                                                                          --
24------------------------------------------------------------------------------
25
26--  This package provides a set of routines to deal with file extensions
27
28with Ada.Strings.Fixed;
29with MLib.Tgt;
30
31package body MLib.Fil is
32
33   use Ada;
34
35   package Target renames MLib.Tgt;
36
37   ---------------
38   -- Append_To --
39   ---------------
40
41   function Append_To
42     (Filename : String;
43      Ext      : String) return String
44   is
45   begin
46      if Ext'Length = 0 then
47         return Filename;
48
49      elsif Filename (Filename'Last) = '.' then
50         if Ext (Ext'First) = '.' then
51            return Filename & Ext (Ext'First + 1 .. Ext'Last);
52
53         else
54            return Filename & Ext;
55         end if;
56
57      else
58         if Ext (Ext'First) = '.' then
59            return Filename & Ext;
60
61         else
62            return Filename & '.' & Ext;
63         end if;
64      end if;
65   end Append_To;
66
67   ------------
68   -- Ext_To --
69   ------------
70
71   function Ext_To
72     (Filename : String;
73      New_Ext  : String := "") return String
74   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         if New_Ext = "" then
85            return Filename;
86         else
87            return Filename & "." & New_Ext;
88         end if;
89
90      else
91         if New_Ext = "" then
92            return Head (Filename, J - 1);
93         else
94            return Head (Filename, J - 1) & '.' & New_Ext;
95         end if;
96      end if;
97   end Ext_To;
98
99   -------------
100   -- Get_Ext --
101   -------------
102
103   function Get_Ext (Filename : String) return String is
104      use Strings.Fixed;
105
106      J : constant Natural :=
107            Index (Source  =>  Filename,
108                   Pattern => ".",
109                   Going   => Strings.Backward);
110
111   begin
112      if J = 0 then
113         return "";
114      else
115         return Filename (J .. Filename'Last);
116      end if;
117   end Get_Ext;
118
119   ----------------
120   -- Is_Archive --
121   ----------------
122
123   function Is_Archive (Filename : String) return Boolean is
124      Ext : constant String := Get_Ext (Filename);
125   begin
126      return Target.Is_Archive_Ext (Ext);
127   end Is_Archive;
128
129   ----------
130   -- Is_C --
131   ----------
132
133   function Is_C (Filename : String) return Boolean is
134      Ext : constant String := Get_Ext (Filename);
135   begin
136      return Target.Is_C_Ext (Ext);
137   end Is_C;
138
139   ------------
140   -- Is_Obj --
141   ------------
142
143   function Is_Obj (Filename : String) return Boolean is
144      Ext : constant String := Get_Ext (Filename);
145   begin
146      return Target.Is_Object_Ext (Ext);
147   end Is_Obj;
148
149end MLib.Fil;
150