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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- P R J . E X T --
-- --
-- B o d y --
-- --
-- Copyright (C) 2000-2013, 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 3, 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 COPYING3. If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Osint; use Osint;
with Ada.Unchecked_Deallocation;
package body Prj.Ext is
----------------
-- Initialize --
----------------
procedure Initialize
(Self : out External_References;
Copy_From : External_References := No_External_Refs)
is
N : Name_To_Name_Ptr;
N2 : Name_To_Name_Ptr;
begin
if Self.Refs = null then
Self.Refs := new Name_To_Name_HTable.Instance;
if Copy_From.Refs /= null then
N := Name_To_Name_HTable.Get_First (Copy_From.Refs.all);
while N /= null loop
N2 := new Name_To_Name'
(Key => N.Key,
Value => N.Value,
Source => N.Source,
Next => null);
Name_To_Name_HTable.Set (Self.Refs.all, N2);
N := Name_To_Name_HTable.Get_Next (Copy_From.Refs.all);
end loop;
end if;
end if;
end Initialize;
---------
-- Add --
---------
procedure Add
(Self : External_References;
External_Name : String;
Value : String;
Source : External_Source := External_Source'First;
Silent : Boolean := False)
is
Key : Name_Id;
N : Name_To_Name_Ptr;
begin
-- For external attribute, set the environment variable
if Source = From_External_Attribute and then External_Name /= "" then
declare
Env_Var : String_Access := Getenv (External_Name);
begin
if Env_Var = null or else Env_Var.all = "" then
Setenv (Name => External_Name, Value => Value);
if not Silent then
Debug_Output
("Environment variable """ & External_Name
& """ = """ & Value & '"');
end if;
elsif not Silent then
Debug_Output
("Not overriding existing environment variable """
& External_Name & """, value is """ & Env_Var.all & '"');
end if;
Free (Env_Var);
end;
end if;
Name_Len := External_Name'Length;
Name_Buffer (1 .. Name_Len) := External_Name;
Canonical_Case_Env_Var_Name (Name_Buffer (1 .. Name_Len));
Key := Name_Find;
-- Check whether the value is already defined, to properly respect the
-- overriding order.
if Source /= External_Source'First then
N := Name_To_Name_HTable.Get (Self.Refs.all, Key);
if N /= null then
if External_Source'Pos (N.Source) <
External_Source'Pos (Source)
then
if not Silent then
Debug_Output
("Not overridding existing external reference '"
& External_Name & "', value was defined in "
& N.Source'Img);
end if;
return;
end if;
end if;
end if;
Name_Len := Value'Length;
Name_Buffer (1 .. Name_Len) := Value;
N := new Name_To_Name'
(Key => Key,
Source => Source,
Value => Name_Find,
Next => null);
if not Silent then
Debug_Output ("Add external (" & External_Name & ") is", N.Value);
end if;
Name_To_Name_HTable.Set (Self.Refs.all, N);
end Add;
-----------
-- Check --
-----------
function Check
(Self : External_References;
Declaration : String) return Boolean
is
begin
for Equal_Pos in Declaration'Range loop
if Declaration (Equal_Pos) = '=' then
exit when Equal_Pos = Declaration'First;
Add
(Self => Self,
External_Name =>
Declaration (Declaration'First .. Equal_Pos - 1),
Value =>
Declaration (Equal_Pos + 1 .. Declaration'Last),
Source => From_Command_Line);
return True;
end if;
end loop;
return False;
end Check;
-----------
-- Reset --
-----------
procedure Reset (Self : External_References) is
begin
if Self.Refs /= null then
Debug_Output ("Reset external references");
Name_To_Name_HTable.Reset (Self.Refs.all);
end if;
end Reset;
--------------
-- Value_Of --
--------------
function Value_Of
(Self : External_References;
External_Name : Name_Id;
With_Default : Name_Id := No_Name)
return Name_Id
is
Value : Name_To_Name_Ptr;
Val : Name_Id;
Name : String := Get_Name_String (External_Name);
begin
Canonical_Case_Env_Var_Name (Name);
if Self.Refs /= null then
Name_Len := Name'Length;
Name_Buffer (1 .. Name_Len) := Name;
Value := Name_To_Name_HTable.Get (Self.Refs.all, Name_Find);
if Value /= null then
Debug_Output ("Value_Of (" & Name & ") is in cache", Value.Value);
return Value.Value;
end if;
end if;
-- Find if it is an environment, if it is, put 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;
Val := Name_Find;
if Current_Verbosity = High then
Debug_Output ("Value_Of (" & Name & ") is", Val);
end if;
if Self.Refs /= null then
Value := new Name_To_Name'
(Key => External_Name,
Value => Val,
Source => From_Environment,
Next => null);
Name_To_Name_HTable.Set (Self.Refs.all, Value);
end if;
Free (Env_Value);
return Val;
else
if Current_Verbosity = High then
Debug_Output
("Value_Of (" & Name & ") is default", With_Default);
end if;
Free (Env_Value);
return With_Default;
end if;
end;
end Value_Of;
----------
-- Free --
----------
procedure Free (Self : in out External_References) is
procedure Unchecked_Free is new Ada.Unchecked_Deallocation
(Name_To_Name_HTable.Instance, Instance_Access);
begin
if Self.Refs /= null then
Reset (Self);
Unchecked_Free (Self.Refs);
end if;
end Free;
--------------
-- Set_Next --
--------------
procedure Set_Next (E : Name_To_Name_Ptr; Next : Name_To_Name_Ptr) is
begin
E.Next := Next;
end Set_Next;
----------
-- Next --
----------
function Next (E : Name_To_Name_Ptr) return Name_To_Name_Ptr is
begin
return E.Next;
end Next;
-------------
-- Get_Key --
-------------
function Get_Key (E : Name_To_Name_Ptr) return Name_Id is
begin
return E.Key;
end Get_Key;
end Prj.Ext;
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