1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 2000-2003 Free Software Foundation, Inc. --
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, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 with Namet; use Namet;
28 with Osint; use Osint;
29 with Prj.Com; use Prj.Com;
30 with Types; use Types;
33 with GNAT.OS_Lib; use GNAT.OS_Lib;
35 package body Prj.Ext is
37 package Htable is new GNAT.HTable.Simple_HTable
38 (Header_Num => Header_Num,
40 No_Element => No_Name,
44 -- External references are stored in this hash table, either by procedure
45 -- Add (directly or through a call to function Check) or by function
46 -- Value_Of when an environment variable is found non empty. Value_Of
47 -- first for external reference in this table, before checking the
48 -- environment. Htable is emptied (reset) by procedure Reset.
55 (External_Name : String;
62 Name_Len := Value'Length;
63 Name_Buffer (1 .. Name_Len) := Value;
64 The_Value := Name_Find;
65 Name_Len := External_Name'Length;
66 Name_Buffer (1 .. Name_Len) := External_Name;
67 Canonical_Case_File_Name (Name_Buffer (1 .. Name_Len));
69 Htable.Set (The_Key, The_Value);
76 function Check (Declaration : String) return Boolean is
78 for Equal_Pos in Declaration'Range loop
79 if Declaration (Equal_Pos) = '=' then
80 exit when Equal_Pos = Declaration'First;
81 exit when Equal_Pos = Declaration'Last;
84 Declaration (Declaration'First .. Equal_Pos - 1),
86 Declaration (Equal_Pos + 1 .. Declaration'Last));
108 (External_Name : Name_Id;
109 With_Default : Name_Id := No_Name)
113 Name : String := Get_Name_String (External_Name);
116 Canonical_Case_File_Name (Name);
117 Name_Len := Name'Length;
118 Name_Buffer (1 .. Name_Len) := Name;
119 The_Value := Htable.Get (Name_Find);
121 if The_Value /= No_Name then
125 -- Find if it is an environment.
126 -- If it is, put the value in the hash table.
129 Env_Value : String_Access := Getenv (Name);
132 if Env_Value /= null and then Env_Value'Length > 0 then
133 Name_Len := Env_Value'Length;
134 Name_Buffer (1 .. Name_Len) := Env_Value.all;
135 The_Value := Name_Find;
136 Htable.Set (External_Name, The_Value);