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

--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                              O S I N T - C                               --

--                                                                          --

--                                 B o d y                                  --

--                                                                          --

--          Copyright (C) 2001-2009, 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 Hostparm;

with Opt;      use Opt;

with Tree_IO;  use Tree_IO;

package body Osint.C is

   Output_Object_File_Name : String_Ptr;

   --  Argument of -o compiler option, if given. This is needed to verify

   --  consistency with the ALI file name.

   procedure Adjust_OS_Resource_Limits;

   pragma Import (C, Adjust_OS_Resource_Limits,

                  "__gnat_adjust_os_resource_limits");

   --  Procedure to make system specific adjustments to make GNAT run better

   function Create_Auxiliary_File

     (Src    : File_Name_Type;

      Suffix : String) return File_Name_Type;

   --  Common processing for Create_List_File, Create_Repinfo_File and

   --  Create_Debug_File. Src is the file name used to create the required

   --  output file and Suffix is the desired suffix (dg/rep/xxx for debug/

   --  repinfo/list file where xxx is specified extension.

   procedure Set_Library_Info_Name;

   --  Sets a default ALI file name from the main compiler source name.

   --  This is used by Create_Output_Library_Info, and by the version of

   --  Read_Library_Info that takes a default file name. The name is in

   --  Name_Buffer (with length in Name_Len) on return from the call.

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

   -- Close_Debug_File --

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

   procedure Close_Debug_File is

      Status : Boolean;

   begin

      Close (Output_FD, Status);

      if not Status then

         Fail

           ("error while closing expanded source file "

            & Get_Name_String (Output_File_Name));

      end if;

   end Close_Debug_File;

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

   -- Close_List_File --

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

   procedure Close_List_File is

      Status : Boolean;

   begin

      Close (Output_FD, Status);

      if not Status then

         Fail

           ("error while closing list file "

            & Get_Name_String (Output_File_Name));

      end if;

   end Close_List_File;

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

   -- Close_Output_Library_Info --

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

   procedure Close_Output_Library_Info is

      Status : Boolean;

   begin

      Close (Output_FD, Status);

      if not Status then

         Fail

           ("error while closing ALI file "

            & Get_Name_String (Output_File_Name));

      end if;

   end Close_Output_Library_Info;

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

   -- Close_Repinfo_File --

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

   procedure Close_Repinfo_File is

      Status : Boolean;

   begin

      Close (Output_FD, Status);

      if not Status then

         Fail

           ("error while closing representation info file "

            & Get_Name_String (Output_File_Name));

      end if;

   end Close_Repinfo_File;

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

   -- Create_Auxiliary_File --

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

   function Create_Auxiliary_File

     (Src    : File_Name_Type;

      Suffix : String) return File_Name_Type

   is

      Result : File_Name_Type;

   begin

      Get_Name_String (Src);

      if Hostparm.OpenVMS then

         Name_Buffer (Name_Len + 1) := '_';

      else

         Name_Buffer (Name_Len + 1) := '.';

      end if;

      Name_Len := Name_Len + 1;

      Name_Buffer (Name_Len + 1 .. Name_Len + Suffix'Length) := Suffix;

      Name_Len := Name_Len + Suffix'Length;

      if Output_Object_File_Name /= null then

         for Index in reverse Output_Object_File_Name'Range loop

            if Output_Object_File_Name (Index) = Directory_Separator then

               declare

                  File_Name : constant String := Name_Buffer (1 .. Name_Len);

               begin

                  Name_Len := Index - Output_Object_File_Name'First + 1;

                  Name_Buffer (1 .. Name_Len) :=

                    Output_Object_File_Name

                      (Output_Object_File_Name'First .. Index);

                  Name_Buffer (Name_Len + 1 .. Name_Len + File_Name'Length) :=

                    File_Name;

                  Name_Len := Name_Len + File_Name'Length;

               end;

               exit;

            end if;

         end loop;

      end if;

      Result := Name_Find;

      Name_Buffer (Name_Len + 1) := ASCII.NUL;

      Create_File_And_Check (Output_FD, Text);

      return Result;

   end Create_Auxiliary_File;

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

   -- Create_Debug_File --

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

   function Create_Debug_File (Src : File_Name_Type) return File_Name_Type is

   begin

      return Create_Auxiliary_File (Src, "dg");

   end Create_Debug_File;

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

   -- Create_List_File --

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

   procedure Create_List_File (S : String) is

      F : File_Name_Type;

      pragma Warnings (Off, F);

   begin

      if S (S'First) = '.' then

         F := Create_Auxiliary_File (Current_Main, S (S'First + 1 .. S'Last));

      else

         Name_Buffer (1 .. S'Length) := S;

         Name_Len := S'Length + 1;

         Name_Buffer (Name_Len) := ASCII.NUL;

         Create_File_And_Check (Output_FD, Text);

      end if;

   end Create_List_File;

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

   -- Create_Output_Library_Info --

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

   procedure Create_Output_Library_Info is

      Dummy : Boolean;

      pragma Unreferenced (Dummy);

   begin

      Set_Library_Info_Name;

      Delete_File (Name_Buffer (1 .. Name_Len), Dummy);

      Create_File_And_Check (Output_FD, Text);

   end Create_Output_Library_Info;

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

   -- Create_Repinfo_File --

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

   procedure Create_Repinfo_File (Src : String) is

      Discard : File_Name_Type;

      pragma Warnings (Off, Discard);

   begin

      Name_Buffer (1 .. Src'Length) := Src;

      Name_Len := Src'Length;

      Discard := Create_Auxiliary_File (Name_Find, "rep");

      return;

   end Create_Repinfo_File;

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

   -- Debug_File_Eol_Length --

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

   function Debug_File_Eol_Length return Nat is

   begin

      --  There has to be a cleaner way to do this! ???

      if Directory_Separator = '/' then

         return 1;

      else

         return 2;

      end if;

   end Debug_File_Eol_Length;

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

   -- Get_Output_Object_File_Name --

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

   function Get_Output_Object_File_Name return String is

   begin

      pragma Assert (Output_Object_File_Name /= null);

      return Output_Object_File_Name.all;

   end Get_Output_Object_File_Name;

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

   -- More_Source_Files --

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

   function More_Source_Files return Boolean renames More_Files;

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

   -- Next_Main_Source --

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

   function Next_Main_Source return File_Name_Type renames Next_Main_File;

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

   -- Read_Library_Info --

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

   --  Version with default file name

   procedure Read_Library_Info

     (Name : out File_Name_Type;

      Text : out Text_Buffer_Ptr)

   is

   begin

      Set_Library_Info_Name;

      Name := Name_Find;

      Text := Read_Library_Info (Name, Fatal_Err => False);

   end Read_Library_Info;

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

   -- Set_Library_Info_Name --

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

   procedure Set_Library_Info_Name is

      Dot_Index : Natural;

   begin

      Get_Name_String (Current_Main);

      --  Find last dot since we replace the existing extension by .ali. The

      --  initialization to Name_Len + 1 provides for simply adding the .ali

      --  extension if the source file name has no extension.

      Dot_Index := Name_Len + 1;

      for J in reverse 1 .. Name_Len loop

         if Name_Buffer (J) = '.' then

            Dot_Index := J;

            exit;

         end if;

      end loop;

      --  Make sure that the output file name matches the source file name.

      --  To compare them, remove file name directories and extensions.

      if Output_Object_File_Name /= null then

         --  Make sure there is a dot at Dot_Index. This may not be the case

         --  if the source file name has no extension.

         Name_Buffer (Dot_Index) := '.';

         --  If we are in multiple unit per file mode, then add ~nnn

         --  extension to the name before doing the comparison.

         if Multiple_Unit_Index /= 0 then

            declare

               Exten : constant String := Name_Buffer (Dot_Index .. Name_Len);

            begin

               Name_Len := Dot_Index - 1;

               Add_Char_To_Name_Buffer (Multi_Unit_Index_Character);

               Add_Nat_To_Name_Buffer (Multiple_Unit_Index);

               Dot_Index := Name_Len + 1;

               Add_Str_To_Name_Buffer (Exten);

            end;

         end if;

         --  Remove extension preparing to replace it

         declare

            Name  : String  := Name_Buffer (1 .. Dot_Index);

            First : Positive;

         begin

            Name_Buffer (1 .. Output_Object_File_Name'Length) :=

              Output_Object_File_Name.all;

            --  Put two names in canonical case, to allow object file names

            --  with upper-case letters on Windows.

            Canonical_Case_File_Name (Name);

            Canonical_Case_File_Name

              (Name_Buffer (1 .. Output_Object_File_Name'Length));

            Dot_Index := 0;

            for J in reverse Output_Object_File_Name'Range loop

               if Name_Buffer (J) = '.' then

                  Dot_Index := J;

                  exit;

               end if;

            end loop;

            --  Dot_Index should not be zero now (we check for extension

            --  elsewhere).

            pragma Assert (Dot_Index /= 0);

            --  Look for first character of file name

            First := Dot_Index;

            while First > 1

              and then Name_Buffer (First - 1) /= Directory_Separator

              and then Name_Buffer (First - 1) /= '/'

            loop

               First := First - 1;

            end loop;

            --  Check name of object file is what we expect

            if Name /= Name_Buffer (First .. Dot_Index) then

               Fail ("incorrect object file name");

            end if;

         end;

      end if;

      Name_Buffer (Dot_Index) := '.';

      Name_Buffer (Dot_Index + 1 .. Dot_Index + 3) := ALI_Suffix.all;

      Name_Buffer (Dot_Index + 4) := ASCII.NUL;

      Name_Len := Dot_Index + 3;

   end Set_Library_Info_Name;

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

   -- Set_Output_Object_File_Name --

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

   procedure Set_Output_Object_File_Name (Name : String) is

      Ext : constant String  := Target_Object_Suffix;

      NL  : constant Natural := Name'Length;

      EL  : constant Natural := Ext'Length;

   begin

      --  Make sure that the object file has the expected extension

      if NL <= EL

         or else

          (Name (NL - EL + Name'First .. Name'Last) /= Ext

             and then Name (NL - 2 + Name'First .. Name'Last) /= ".o")

      then

         Fail ("incorrect object file extension");

      end if;

      Output_Object_File_Name := new String'(Name);

   end Set_Output_Object_File_Name;

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

   -- Tree_Close --

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

   procedure Tree_Close is

      Status : Boolean;

   begin

      Tree_Write_Terminate;

      Close (Output_FD, Status);

      if not Status then

         Fail

           ("error while closing tree file "

            & Get_Name_String (Output_File_Name));

      end if;

   end Tree_Close;

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

   -- Tree_Create --

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

   procedure Tree_Create is

      Dot_Index : Natural;

   begin

      Get_Name_String (Current_Main);

      --  If an object file has been specified, then the ALI file

      --  will be in the same directory as the object file;

      --  so, we put the tree file in this same directory,

      --  even though no object file needs to be generated.

      if Output_Object_File_Name /= null then

         Name_Len := Output_Object_File_Name'Length;

         Name_Buffer (1 .. Name_Len) := Output_Object_File_Name.all;

      end if;

      Dot_Index := Name_Len + 1;

      for J in reverse 1 .. Name_Len loop

         if Name_Buffer (J) = '.' then

            Dot_Index := J;

            exit;

         end if;

      end loop;

      --  Should be impossible to not have an extension

      pragma Assert (Dot_Index /= 0);

      --  Change extension to adt

      Name_Buffer (Dot_Index) := '.';

      Name_Buffer (Dot_Index + 1) := 'a';

      Name_Buffer (Dot_Index + 2) := 'd';

      Name_Buffer (Dot_Index + 3) := 't';

      Name_Buffer (Dot_Index + 4) := ASCII.NUL;

      Name_Len := Dot_Index + 3;

      Create_File_And_Check (Output_FD, Binary);

      Tree_Write_Initialize (Output_FD);

   end Tree_Create;

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

   -- Write_Debug_Info --

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

   procedure Write_Debug_Info (Info : String) renames Write_Info;

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

   -- Write_Library_Info --

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

   procedure Write_Library_Info (Info : String) renames Write_Info;

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

   -- Write_List_Info --

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

   procedure Write_List_Info (S : String) is

   begin

      Write_With_Check (S'Address, S'Length);

   end Write_List_Info;

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

   -- Write_Repinfo_Line --

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

   procedure Write_Repinfo_Line (Info : String) renames Write_Info;

begin

   Adjust_OS_Resource_Limits;

   Opt.Create_Repinfo_File_Access := Create_Repinfo_File'Access;

   Opt.Write_Repinfo_Line_Access  := Write_Repinfo_Line'Access;

   Opt.Close_Repinfo_File_Access  := Close_Repinfo_File'Access;

   Opt.Create_List_File_Access := Create_List_File'Access;

   Opt.Write_List_Info_Access  := Write_List_Info'Access;

   Opt.Close_List_File_Access  := Close_List_File'Access;

   Set_Program (Compiler);

end Osint.C;