------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- P R J . E X T -- -- -- -- B o d y -- -- -- -- Copyright (C) 2000-2007, 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, 51 Franklin Street, Fifth Floor, -- -- Boston, MA 02110-1301, USA. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ with Hostparm; with Makeutl; use Makeutl; with Output; use Output; with Osint; use Osint; with Sdefault; with GNAT.HTable; package body Prj.Ext is Gpr_Project_Path : constant String := "GPR_PROJECT_PATH"; Ada_Project_Path : constant String := "ADA_PROJECT_PATH"; -- Name of the env. variables that contain path name(s) of directories -- where project files may reside. GPR_PROJECT_PATH has precedence over -- ADA_PROJECT_PATH. Gpr_Prj_Path : constant String_Access := Getenv (Gpr_Project_Path); Ada_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 by procedure Initialize_Project_Path -- below. procedure Initialize_Project_Path; -- Initialize Current_Project_Path 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. package Search_Directories is new Table.Table (Table_Component_Type => Name_Id, Table_Index_Type => Natural, Table_Low_Bound => 1, Table_Initial => 4, Table_Increment => 100, Table_Name => "Prj.Ext.Search_Directories"); -- The table for the directories specified with -aP switches --------- -- 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; ---------------------------------- -- Add_Search_Project_Directory -- ---------------------------------- procedure Add_Search_Project_Directory (Path : String) is begin Name_Len := 0; Add_Str_To_Name_Buffer (Path); Search_Directories.Append (Name_Find); end Add_Search_Project_Directory; ----------- -- 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; ----------------------------- -- Initialize_Project_Path -- ----------------------------- procedure Initialize_Project_Path is Add_Default_Dir : Boolean := True; First : Positive; Last : Positive; New_Len : Positive; New_Last : Positive; Prj_Path : String_Access := null; begin if Gpr_Prj_Path.all /= "" then if Hostparm.OpenVMS then Prj_Path := To_Canonical_Path_Spec ("GPR_PROJECT_PATH:"); else Prj_Path := To_Canonical_Path_Spec (Gpr_Prj_Path.all); end if; -- Warn if both environment variables are defined if Ada_Prj_Path.all /= "" then Write_Line ("Warning: ADA_PROJECT_PATH is not taken into account"); Write_Line (" when GPR_PROJECT_PATH is defined"); end if; elsif Ada_Prj_Path.all /= "" then if Hostparm.OpenVMS then Prj_Path := To_Canonical_Path_Spec ("ADA_PROJECT_PATH:"); else Prj_Path := To_Canonical_Path_Spec (Ada_Prj_Path.all); end if; end if; -- The current directory is always first Name_Len := 1; Name_Buffer (Name_Len) := '.'; -- If there are directories in the Search_Directories table, add them for J in 1 .. Search_Directories.Last loop Name_Len := Name_Len + 1; Name_Buffer (Name_Len) := Path_Separator; Add_Str_To_Name_Buffer (Get_Name_String (Search_Directories.Table (J))); end loop; -- If environment variable is defined, add its content if Prj_Path /= null then Name_Len := Name_Len + 1; Name_Buffer (Name_Len) := Path_Separator; Add_Str_To_Name_Buffer (Prj_Path.all); end if; -- Scan the directory path to see if "-" is one of the directories. -- Remove each occurence of "-" and set Add_Default_Dir to False. -- Also resolve relative paths and symbolic links. 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; elsif not Hostparm.OpenVMS or else not Is_Absolute_Path (Name_Buffer (First .. Last)) then -- On VMS, only expand relative path names, as absolute paths -- may correspond to multi-valued VMS logical names. declare New_Dir : constant String := Normalize_Pathname (Name_Buffer (First .. Last)); begin -- If the absolute path was resolved and is different from -- the original, replace original with the resolved path. if New_Dir /= Name_Buffer (First .. Last) and then New_Dir'Length /= 0 then New_Len := Name_Len + New_Dir'Length - (Last - First + 1); New_Last := First + New_Dir'Length - 1; Name_Buffer (New_Last + 1 .. New_Len) := Name_Buffer (Last + 1 .. Name_Len); Name_Buffer (First .. New_Last) := New_Dir; Name_Len := New_Len; Last := New_Last; end if; end; end if; First := Last + 1; end loop; -- Set the initial value of Current_Project_Path if Add_Default_Dir then declare Prefix : String_Ptr := Sdefault.Search_Dir_Prefix; begin if Prefix = null then Prefix := new String'(Executable_Prefix_Path); if Prefix.all /= "" then Current_Project_Path := new String'(Name_Buffer (1 .. Name_Len) & Path_Separator & Prefix.all & Directory_Separator & "gnat"); end if; else Current_Project_Path := new String'(Name_Buffer (1 .. Name_Len) & Path_Separator & Prefix.all & ".." & Directory_Separator & ".." & Directory_Separator & ".." & Directory_Separator & "gnat"); end if; end; else Current_Project_Path := new String'(Name_Buffer (1 .. Name_Len)); end if; end Initialize_Project_Path; ------------------ -- Project_Path -- ------------------ function Project_Path return String is begin if Current_Project_Path = null then Initialize_Project_Path; end if; 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 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;