Subversion Repositories openrisc_2011-10-31

------------------------------------------------------------------------------

--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                              P R J . E X T                               --

--                                                                          --

--                                 B o d y                                  --

--                                                                          --

--          Copyright (C) 2000-2009, 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 System.OS_Lib; use System.OS_Lib;

with Hostparm;

with Makeutl;       use Makeutl;

with Opt;

with Osint;         use Osint;

with Prj.Tree;      use Prj.Tree;

with Sdefault;

package body Prj.Ext is

   No_Project_Default_Dir : constant String := "-";

   --  Indicator in the project path to indicate that the default search

   --  directories should not be added to the path

   Uninitialized_Prefix : constant String := '#' & Path_Separator;

   --  Prefix to indicate that the project path has not been initilized yet.

   --  Must be two characters long

   procedure Initialize_Project_Path (Tree : Prj.Tree.Project_Node_Tree_Ref);

   --  Initialize Current_Project_Path

   ---------

   -- Add --

   ---------

   procedure Add

     (Tree          : Prj.Tree.Project_Node_Tree_Ref;

      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;

      Name_To_Name_HTable.Set (Tree.External_References, The_Key, The_Value);

   end Add;

   ----------------------------------

   -- Add_Search_Project_Directory --

   ----------------------------------

   procedure Add_Search_Project_Directory

     (Tree : Prj.Tree.Project_Node_Tree_Ref;

      Path : String)

   is

      Tmp : String_Access;

   begin

      if Tree.Project_Path = null then

         Tree.Project_Path := new String'(Uninitialized_Prefix & Path);

      else

         Tmp := Tree.Project_Path;

         Tree.Project_Path := new String'(Tmp.all & Path_Separator & Path);

         Free (Tmp);

      end if;

   end Add_Search_Project_Directory;

   -----------

   -- Check --

   -----------

   function Check

     (Tree        : Prj.Tree.Project_Node_Tree_Ref;

      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

              (Tree          => Tree,

               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 (Tree : Prj.Tree.Project_Node_Tree_Ref) is

      Add_Default_Dir : Boolean := True;

      First           : Positive;

      Last            : Positive;

      New_Len         : Positive;

      New_Last        : Positive;

      Ada_Project_Path : constant String := "ADA_PROJECT_PATH";

      Gpr_Project_Path : constant String := "GPR_PROJECT_PATH";

      --  Name of alternate env. variable that contain path name(s) of

      --  directories where project files may reside. GPR_PROJECT_PATH has

      --  precedence over ADA_PROJECT_PATH.

      Gpr_Prj_Path : String_Access := Getenv (Gpr_Project_Path);

      Ada_Prj_Path : String_Access := Getenv (Ada_Project_Path);

      --  The path name(s) of directories where project files may reside.

      --  May be empty.

   begin

      --  The current directory is always first in the search path. Since the

      --  Project_Path currently starts with '#:' as a sign that it isn't

      --  initialized, we simply replace '#' with '.'

      if Tree.Project_Path = null then

         Tree.Project_Path := new String'('.' & Path_Separator);

      else

         Tree.Project_Path (Tree.Project_Path'First) := '.';

      end if;

      --  Then the reset of the project path (if any) currently contains the

      --  directories added through Add_Search_Project_Directory

      --  If environment variables are defined and not empty, add their content

      if Gpr_Prj_Path.all /= "" then

         Add_Search_Project_Directory (Tree, Gpr_Prj_Path.all);

      end if;

      Free (Gpr_Prj_Path);

      if Ada_Prj_Path.all /= "" then

         Add_Search_Project_Directory (Tree, Ada_Prj_Path.all);

      end if;

      Free (Ada_Prj_Path);

      --  Copy to Name_Buffer, since we will need to manipulate the path

      Name_Len := Tree.Project_Path'Length;

      Name_Buffer (1 .. Name_Len) := Tree.Project_Path.all;

      --  Scan the directory path to see if "-" is one of the directories.

      --  Remove each occurrence 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;

            --  After removing the '-', go back one character to get the next

            --  directory correctly.

            Last := Last - 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),

                              Resolve_Links => Opt.Follow_Links_For_Dirs);

            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;

      Free (Tree.Project_Path);

      --  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

                  Add_Str_To_Name_Buffer

                    (Path_Separator & Prefix.all &

                     "share" & Directory_Separator & "gpr");

                  Add_Str_To_Name_Buffer

                    (Path_Separator & Prefix.all &

                     Directory_Separator & "lib" &

                     Directory_Separator & "gnat");

               end if;

            else

               Tree.Project_Path :=

                 new String'(Name_Buffer (1 .. Name_Len) & Path_Separator &

                             Prefix.all &

                             ".." &  Directory_Separator &

                             ".." & Directory_Separator &

                             ".." & Directory_Separator & "gnat");

            end if;

            Free (Prefix);

         end;

      end if;

      if Tree.Project_Path = null then

         Tree.Project_Path := new String'(Name_Buffer (1 .. Name_Len));

      end if;

   end Initialize_Project_Path;

   ------------------

   -- Project_Path --

   ------------------

   function Project_Path (Tree : Project_Node_Tree_Ref) return String is

   begin

      if Tree.Project_Path = null

        or else Tree.Project_Path (Tree.Project_Path'First) = '#'

      then

         Initialize_Project_Path (Tree);

      end if;

      return Tree.Project_Path.all;

   end Project_Path;

   -----------

   -- Reset --

   -----------

   procedure Reset (Tree : Prj.Tree.Project_Node_Tree_Ref) is

   begin

      Name_To_Name_HTable.Reset (Tree.External_References);

   end Reset;

   ----------------------

   -- Set_Project_Path --

   ----------------------

   procedure Set_Project_Path

     (Tree     : Project_Node_Tree_Ref;

      New_Path : String) is

   begin

      Free (Tree.Project_Path);

      Tree.Project_Path := new String'(New_Path);

   end Set_Project_Path;

   --------------

   -- Value_Of --

   --------------

   function Value_Of

     (Tree          : Prj.Tree.Project_Node_Tree_Ref;

      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 :=

        Name_To_Name_HTable.Get (Tree.External_References, 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;

            Name_To_Name_HTable.Set

              (Tree.External_References, 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;