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

--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                              T E M P D I R                               --

--                                                                          --

--                                 B o d y                                  --

--                                                                          --

--          Copyright (C) 2003-2009, 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 GNAT.Directory_Operations; use GNAT.Directory_Operations;

with Hostparm; use Hostparm;

with Opt;      use Opt;

with Output;   use Output;

package body Tempdir is

   Tmpdir_Needs_To_Be_Displayed : Boolean := True;

   Tmpdir    : constant String := "TMPDIR";

   Gnutmpdir : constant String := "GNUTMPDIR";

   No_Dir    : aliased String  := "";

   Temp_Dir  : String_Access   := No_Dir'Access;

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

   -- Create_Temp_File --

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

   procedure Create_Temp_File

     (FD   : out File_Descriptor;

      Name : out Path_Name_Type)

   is

      File_Name : String_Access;

      Current_Dir : constant String := Get_Current_Dir;

      function Directory return String;

      --  Returns Temp_Dir.all if not empty, else return current directory

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

      -- Directory --

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

      function Directory return String is

      begin

         if Temp_Dir'Length /= 0 then

            return Temp_Dir.all;

         else

            return Current_Dir;

         end if;

      end Directory;

   --  Start of processing Tempdir

   begin

      if Temp_Dir'Length /= 0 then

         --  In verbose mode, display once the value of TMPDIR, so that

         --  if temp files cannot be created, it is easier to understand

         --  where temp files are supposed to be created.

         if Verbose_Mode and then Tmpdir_Needs_To_Be_Displayed then

            Write_Str ("TMPDIR = """);

            Write_Str (Temp_Dir.all);

            Write_Line ("""");

            Tmpdir_Needs_To_Be_Displayed := False;

         end if;

         --  Change directory to TMPDIR before creating the temp file,

         --  then change back immediately to the previous directory.

         Change_Dir (Temp_Dir.all);

         Create_Temp_File (FD, File_Name);

         Change_Dir (Current_Dir);

      else

         Create_Temp_File (FD, File_Name);

      end if;

      if FD = Invalid_FD then

         Write_Line ("could not create temporary file in " & Directory);

         Name := No_Path;

      else

         declare

            Path_Name : constant String :=

                          Normalize_Pathname

                            (Directory & Directory_Separator & File_Name.all);

         begin

            Name_Len := Path_Name'Length;

            Name_Buffer (1 .. Name_Len) := Path_Name;

            Name := Name_Find;

            Free (File_Name);

         end;

      end if;

   end Create_Temp_File;

--  Start of elaboration for package Tempdir

begin

   declare

      Dir : String_Access;

   begin

      --  On VMS, if GNUTMPDIR is defined, use it

      if OpenVMS then

         Dir := Getenv (Gnutmpdir);

         --  Otherwise, if GNUTMPDIR is not defined, try TMPDIR

         if Dir'Length = 0 then

            Dir := Getenv (Tmpdir);

         end if;

      else

         Dir := Getenv (Tmpdir);

      end if;

      if Dir'Length > 0 and then

        Is_Absolute_Path (Dir.all) and then

        Is_Directory (Dir.all)

      then

         Temp_Dir := new String'(Normalize_Pathname (Dir.all));

      end if;

      Free (Dir);

   end;

end Tempdir;