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-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- P R J . E X T --
--- --
--- B o d y --
--- --
--- Copyright (C) 2000-2011, 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)
- is
- Key : Name_Id;
- N : Name_To_Name_Ptr;
-
- begin
- 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 Current_Verbosity = High then
- Debug_Output
- ("Not overridding existing variable '" & 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 Current_Verbosity = High 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;