------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- P R J . E X T -- -- -- -- B o d y -- -- -- -- Copyright (C) 2000-2004 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 Sdefault; with Types; use Types; with GNAT.HTable; with GNAT.OS_Lib; use GNAT.OS_Lib; package body Prj.Ext is Ada_Project_Path : constant String := "ADA_PROJECT_PATH"; -- Name of the env. variable that contains path name(s) of directories -- where project files may reside. Prj_Path : constant String_Access := Getenv (Ada_Project_Path); -- The path name(s) of directories where project files may reside. -- May be empty. No_Project_Default_Dir : constant String := "-"; Current_Project_Path : String_Access; -- The project path; initialized during elaboration of package -- Contains at least the current working directory. 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; ------------------ -- Project_Path -- ------------------ function Project_Path return String is begin return Current_Project_Path.all; end Project_Path; ----------- -- Reset -- ----------- procedure Reset is begin Htable.Reset; end Reset; ---------------------- -- Set_Project_Path -- ---------------------- procedure Set_Project_Path (New_Path : String) is begin Free (Current_Project_Path); Current_Project_Path := new String'(New_Path); end Set_Project_Path; -------------- -- 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; begin -- Initialize Current_Project_Path during package elaboration declare Add_Default_Dir : Boolean := True; First : Positive; Last : Positive; begin -- The current directory is always first Name_Len := 1; Name_Buffer (Name_Len) := '.'; -- If env. var. is defined and not empty, add its content if Prj_Path.all /= "" then Name_Len := Name_Len + 1; Name_Buffer (Name_Len) := Path_Separator; Add_Str_To_Name_Buffer (Prj_Path.all); -- Scan the directory path to see if "-" is one of the directories. -- Remove each occurence of "-" and set Add_Default_Dir to False. First := 3; loop while First <= Name_Len and then (Name_Buffer (First) = Path_Separator) loop First := First + 1; end loop; exit when First > Name_Len; Last := First; while Last < Name_Len and then Name_Buffer (Last + 1) /= Path_Separator loop Last := Last + 1; end loop; -- If the directory is "-", set Add_Default_Dir to False and -- remove from path. if Name_Buffer (First .. Last) = No_Project_Default_Dir then Add_Default_Dir := False; for J in Last + 1 .. Name_Len loop Name_Buffer (J - No_Project_Default_Dir'Length - 1) := Name_Buffer (J); end loop; Name_Len := Name_Len - No_Project_Default_Dir'Length - 1; end if; First := Last + 1; end loop; end if; -- Set the initial value of Current_Project_Path if Add_Default_Dir then Current_Project_Path := new String'(Name_Buffer (1 .. Name_Len) & Path_Separator & Sdefault.Search_Dir_Prefix.all & ".." & Directory_Separator & ".." & Directory_Separator & ".." & Directory_Separator & "gnat"); else Current_Project_Path := new String'(Name_Buffer (1 .. Name_Len)); end if; end; end Prj.Ext;