148 lines
5.0 KiB
Ada
148 lines
5.0 KiB
Ada
------------------------------------------------------------------------------
|
|
-- --
|
|
-- GNAT COMPILER COMPONENTS --
|
|
-- --
|
|
-- P R J . E X T --
|
|
-- --
|
|
-- B o d y --
|
|
-- --
|
|
-- Copyright (C) 2000-2003 Free Software Foundation, Inc. --
|
|
-- --
|
|
-- GNAT is free software; you can redistribute it and/or modify it under --
|
|
-- terms of the GNU General Public License as published by the Free Soft- --
|
|
-- ware Foundation; either version 2, or (at your option) any later ver- --
|
|
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
|
|
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
|
|
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
|
|
-- for more details. You should have received a copy of the GNU General --
|
|
-- Public License distributed with GNAT; see file COPYING. If not, write --
|
|
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
|
|
-- MA 02111-1307, USA. --
|
|
-- --
|
|
-- GNAT was originally developed by the GNAT team at New York University. --
|
|
-- Extensive contributions were provided by Ada Core Technologies Inc. --
|
|
-- --
|
|
------------------------------------------------------------------------------
|
|
|
|
with Namet; use Namet;
|
|
with Osint; use Osint;
|
|
with Prj.Com; use Prj.Com;
|
|
with Types; use Types;
|
|
|
|
with GNAT.HTable;
|
|
with GNAT.OS_Lib; use GNAT.OS_Lib;
|
|
|
|
package body Prj.Ext is
|
|
|
|
package Htable is new GNAT.HTable.Simple_HTable
|
|
(Header_Num => Header_Num,
|
|
Element => Name_Id,
|
|
No_Element => No_Name,
|
|
Key => Name_Id,
|
|
Hash => Hash,
|
|
Equal => "=");
|
|
-- External references are stored in this hash table, either by procedure
|
|
-- Add (directly or through a call to function Check) or by function
|
|
-- Value_Of when an environment variable is found non empty. Value_Of
|
|
-- first for external reference in this table, before checking the
|
|
-- environment. Htable is emptied (reset) by procedure Reset.
|
|
|
|
---------
|
|
-- Add --
|
|
---------
|
|
|
|
procedure Add
|
|
(External_Name : String;
|
|
Value : String)
|
|
is
|
|
The_Key : Name_Id;
|
|
The_Value : Name_Id;
|
|
|
|
begin
|
|
Name_Len := Value'Length;
|
|
Name_Buffer (1 .. Name_Len) := Value;
|
|
The_Value := Name_Find;
|
|
Name_Len := External_Name'Length;
|
|
Name_Buffer (1 .. Name_Len) := External_Name;
|
|
Canonical_Case_File_Name (Name_Buffer (1 .. Name_Len));
|
|
The_Key := Name_Find;
|
|
Htable.Set (The_Key, The_Value);
|
|
end Add;
|
|
|
|
-----------
|
|
-- Check --
|
|
-----------
|
|
|
|
function Check (Declaration : String) return Boolean is
|
|
begin
|
|
for Equal_Pos in Declaration'Range loop
|
|
if Declaration (Equal_Pos) = '=' then
|
|
exit when Equal_Pos = Declaration'First;
|
|
exit when Equal_Pos = Declaration'Last;
|
|
Add
|
|
(External_Name =>
|
|
Declaration (Declaration'First .. Equal_Pos - 1),
|
|
Value =>
|
|
Declaration (Equal_Pos + 1 .. Declaration'Last));
|
|
return True;
|
|
end if;
|
|
end loop;
|
|
|
|
return False;
|
|
end Check;
|
|
|
|
-----------
|
|
-- Reset --
|
|
-----------
|
|
|
|
procedure Reset is
|
|
begin
|
|
Htable.Reset;
|
|
end Reset;
|
|
|
|
--------------
|
|
-- Value_Of --
|
|
--------------
|
|
|
|
function Value_Of
|
|
(External_Name : Name_Id;
|
|
With_Default : Name_Id := No_Name)
|
|
return Name_Id
|
|
is
|
|
The_Value : Name_Id;
|
|
Name : String := Get_Name_String (External_Name);
|
|
|
|
begin
|
|
Canonical_Case_File_Name (Name);
|
|
Name_Len := Name'Length;
|
|
Name_Buffer (1 .. Name_Len) := Name;
|
|
The_Value := Htable.Get (Name_Find);
|
|
|
|
if The_Value /= No_Name then
|
|
return The_Value;
|
|
end if;
|
|
|
|
-- Find if it is an environment.
|
|
-- If it is, put the value in the hash table.
|
|
|
|
declare
|
|
Env_Value : String_Access := Getenv (Name);
|
|
|
|
begin
|
|
if Env_Value /= null and then Env_Value'Length > 0 then
|
|
Name_Len := Env_Value'Length;
|
|
Name_Buffer (1 .. Name_Len) := Env_Value.all;
|
|
The_Value := Name_Find;
|
|
Htable.Set (External_Name, The_Value);
|
|
Free (Env_Value);
|
|
return The_Value;
|
|
|
|
else
|
|
Free (Env_Value);
|
|
return With_Default;
|
|
end if;
|
|
end;
|
|
end Value_Of;
|
|
|
|
end Prj.Ext;
|