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

--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                             S W I T C H - B                              --

--                                                                          --

--                                 B o d y                                  --

--                                                                          --

--          Copyright (C) 2001-2011, 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 Debug;  use Debug;

with Osint;  use Osint;

with Opt;    use Opt;

with System.WCh_Con; use System.WCh_Con;

package body Switch.B is

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

   -- Scan_Binder_Switches --

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

   procedure Scan_Binder_Switches (Switch_Chars : String) is

      Max : constant Integer := Switch_Chars'Last;

      Ptr : Integer          := Switch_Chars'First;

      C   : Character        := ' ';

      function Get_Optional_Filename return String_Ptr;

      --  If current character is '=', return a newly allocated string that

      --  contains the remainder of the current switch (after the '='), else

      --  return null.

      function Get_Stack_Size (S : Character) return Int;

      --  Used for -d and -D to scan stack size including handling k/m. S is

      --  set to 'd' or 'D' to indicate the switch being scanned.

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

      -- Get_Optional_Filename --

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

      function Get_Optional_Filename return String_Ptr is

         Result : String_Ptr;

      begin

         if Ptr <= Max and then Switch_Chars (Ptr) = '=' then

            if Ptr = Max then

               Bad_Switch (Switch_Chars);

            else

               Result := new String'(Switch_Chars (Ptr + 1 .. Max));

               Ptr := Max + 1;

               return Result;

            end if;

         end if;

         return null;

      end Get_Optional_Filename;

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

      -- Get_Stack_Size --

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

      function Get_Stack_Size (S : Character) return Int is

         Result : Int;

      begin

         Scan_Pos (Switch_Chars, Max, Ptr, Result, S);

         --  In the following code, we enable overflow checking since the

         --  multiplication by K or M may cause overflow, which is an error.

         declare

            pragma Unsuppress (Overflow_Check);

         begin

            --  Check for additional character 'k' (for kilobytes) or 'm' (for

            --  Megabytes), but only if we have not reached the end of the

            --  switch string. Note that if this appears before the end of the

            --  string we will get an error when we test to make sure that the

            --  string is exhausted (at the end of the case).

            if Ptr <= Max then

               if Switch_Chars (Ptr) = 'k' then

                  Result := Result * 1024;

                  Ptr := Ptr + 1;

               elsif Switch_Chars (Ptr) = 'm' then

                  Result := Result * (1024 * 1024);

                  Ptr := Ptr + 1;

               end if;

            end if;

         exception

            when Constraint_Error =>

               Osint.Fail ("numeric value out of range for switch: " & S);

         end;

         return Result;

      end Get_Stack_Size;

   --  Start of processing for Scan_Binder_Switches

   begin

      --  Skip past the initial character (must be the switch character)

      if Ptr = Max then

         Bad_Switch (Switch_Chars);

      else

         Ptr := Ptr + 1;

      end if;

      --  A little check, "gnat" at the start of a switch is not allowed except

      --  for the compiler

      if Switch_Chars'Last >= Ptr + 3

        and then Switch_Chars (Ptr .. Ptr + 3) = "gnat"

      then

         Osint.Fail ("invalid switch: """ & Switch_Chars & """"

                     & " (gnat not needed here)");

      end if;

      --  Loop to scan through switches given in switch string

      Check_Switch : begin

         C := Switch_Chars (Ptr);

         case C is

         --  Processing for a switch

         when 'a' =>

            Ptr := Ptr + 1;

            Use_Pragma_Linker_Constructor := True;

         --  Processing for A switch

         when 'A' =>

            Ptr := Ptr + 1;

            Output_ALI_List := True;

            ALI_List_Filename := Get_Optional_Filename;

         --  Processing for b switch

         when 'b' =>

            Ptr := Ptr + 1;

            Brief_Output := True;

         --  Processing for c switch

         when 'c' =>

            Ptr := Ptr + 1;

            Check_Only := True;

         --  Processing for d switch

         when 'd' =>

            if Ptr = Max then

               Bad_Switch (Switch_Chars);

            end if;

            Ptr := Ptr + 1;

            C := Switch_Chars (Ptr);

            --  Case where character after -d is a digit (default stack size)

            if C in '0' .. '9' then

               --  In this case, we process the default primary stack size

               Default_Stack_Size := Get_Stack_Size ('d');

            --  Case where character after -d is not digit (debug flags)

            else

               --  Note: for the debug switch, the remaining characters in this

               --  switch field must all be debug flags, since all valid switch

               --  characters are also valid debug characters. This switch is

               --  not documented on purpose because it is only used by the

               --  implementors.

               --  Loop to scan out debug flags

               loop

                  C := Switch_Chars (Ptr);

                  if C in 'a' .. 'z' or else C in 'A' .. 'Z' then

                     Set_Debug_Flag (C);

                  else

                     Bad_Switch (Switch_Chars);

                  end if;

                  Ptr := Ptr + 1;

                  exit when Ptr > Max;

               end loop;

            end if;

         --  Processing for D switch

         when 'D' =>

            if Ptr = Max then

               Bad_Switch (Switch_Chars);

            end if;

            Ptr := Ptr + 1;

            Default_Sec_Stack_Size := Get_Stack_Size ('D');

         --  Processing for e switch

         when 'e' =>

            Ptr := Ptr + 1;

            Elab_Dependency_Output := True;

         --  Processing for E switch

         when 'E' =>

            Ptr := Ptr + 1;

            Exception_Tracebacks := True;

         --  Processing for F switch

         when 'F' =>

            Ptr := Ptr + 1;

            Force_Checking_Of_Elaboration_Flags := True;

         --  Processing for g switch

         when 'g' =>

            Ptr := Ptr + 1;

            if Ptr <= Max then

               C := Switch_Chars (Ptr);

               if C in '0' .. '3' then

                  Debugger_Level :=

                    Character'Pos

                      (Switch_Chars (Ptr)) - Character'Pos ('0');

                  Ptr := Ptr + 1;

               end if;

            else

               Debugger_Level := 2;

            end if;

         --  Processing for h switch

         when 'h' =>

            Ptr := Ptr + 1;

            Usage_Requested := True;

         --  Processing for H switch

         when 'H' =>

            if Ptr = Max then

               Bad_Switch (Switch_Chars);

            end if;

            Ptr := Ptr + 1;

            Scan_Nat (Switch_Chars, Max, Ptr, Heap_Size, C);

            if Heap_Size /= 32 and then Heap_Size /= 64 then

               Bad_Switch (Switch_Chars);

            end if;

         --  Processing for i switch

         when 'i' =>

            if Ptr = Max then

               Bad_Switch (Switch_Chars);

            end if;

            Ptr := Ptr + 1;

            C := Switch_Chars (Ptr);

            if C in '1' .. '5'

              or else C = '8'

              or else C = 'p'

              or else C = 'f'

              or else C = 'n'

              or else C = 'w'

            then

               Identifier_Character_Set := C;

               Ptr := Ptr + 1;

            else

               Bad_Switch (Switch_Chars);

            end if;

         --  Processing for K switch

         when 'K' =>

            Ptr := Ptr + 1;

            Output_Linker_Option_List := True;

         --  Processing for l switch

         when 'l' =>

            Ptr := Ptr + 1;

            Elab_Order_Output := True;

         --  Processing for m switch

         when 'm' =>

            if Ptr = Max then

               Bad_Switch (Switch_Chars);

            end if;

            Ptr := Ptr + 1;

            Scan_Pos (Switch_Chars, Max, Ptr, Maximum_Messages, C);

         --  Processing for n switch

         when 'n' =>

            Ptr := Ptr + 1;

            Bind_Main_Program := False;

            --  Note: The -L option of the binder also implies -n, so

            --  any change here must also be reflected in the processing

            --  for -L that is found in Gnatbind.Scan_Bind_Arg.

         --  Processing for o switch

         when 'o' =>

            Ptr := Ptr + 1;

            if Output_File_Name_Present then

               Osint.Fail ("duplicate -o switch");

            else

               Output_File_Name_Present := True;

            end if;

         --  Processing for O switch

         when 'O' =>

            Ptr := Ptr + 1;

            Output_Object_List := True;

            Object_List_Filename := Get_Optional_Filename;

         --  Processing for p switch

         when 'p' =>

            Ptr := Ptr + 1;

            Pessimistic_Elab_Order := True;

         --  Processing for P switch

         when 'P' =>

            Ptr := Ptr + 1;

            CodePeer_Mode := True;

         --  Processing for q switch

         when 'q' =>

            Ptr := Ptr + 1;

            Quiet_Output := True;

         --  Processing for r switch

         when 'r' =>

            Ptr := Ptr + 1;

            List_Restrictions := True;

         --  Processing for R switch

         when 'R' =>

            Ptr := Ptr + 1;

            List_Closure := True;

         --  Processing for s switch

         when 's' =>

            Ptr := Ptr + 1;

            All_Sources := True;

            Check_Source_Files := True;

         --  Processing for t switch

         when 't' =>

            Ptr := Ptr + 1;

            Tolerate_Consistency_Errors := True;

         --  Processing for T switch

         when 'T' =>

            if Ptr = Max then

               Bad_Switch (Switch_Chars);

            end if;

            Ptr := Ptr + 1;

            Time_Slice_Set := True;

            Scan_Nat (Switch_Chars, Max, Ptr, Time_Slice_Value, C);

            Time_Slice_Value := Time_Slice_Value * 1_000;

         --  Processing for u switch

         when 'u' =>

            if Ptr = Max then

               Bad_Switch (Switch_Chars);

            end if;

            Ptr := Ptr + 1;

            Dynamic_Stack_Measurement := True;

            Scan_Nat

              (Switch_Chars,

               Max,

               Ptr,

               Dynamic_Stack_Measurement_Array_Size,

               C);

         --  Processing for v switch

         when 'v' =>

            Ptr := Ptr + 1;

            Verbose_Mode := True;

         --  Processing for w switch

         when 'w' =>

            if Ptr = Max then

               Bad_Switch (Switch_Chars);

            end if;

            --  For the binder we only allow suppress/error cases

            Ptr := Ptr + 1;

            case Switch_Chars (Ptr) is

               when 'e' =>

                  Warning_Mode := Treat_As_Error;

               when 's' =>

                  Warning_Mode := Suppress;

               when others =>

                  Bad_Switch (Switch_Chars);

            end case;

            Ptr := Ptr + 1;

         --  Processing for W switch

         when 'W' =>

            Ptr := Ptr + 1;

            if Ptr > Max then

               Bad_Switch (Switch_Chars);

            end if;

            begin

               Wide_Character_Encoding_Method :=

                 Get_WC_Encoding_Method (Switch_Chars (Ptr));

            exception

               when Constraint_Error =>

                  Bad_Switch (Switch_Chars);

            end;

            Wide_Character_Encoding_Method_Specified := True;

            Upper_Half_Encoding :=

              Wide_Character_Encoding_Method in WC_Upper_Half_Encoding_Method;

            Ptr := Ptr + 1;

         --  Processing for x switch

         when 'x' =>

            Ptr := Ptr + 1;

            All_Sources := False;

            Check_Source_Files := False;

         --  Processing for X switch

         when 'X' =>

            if Ptr = Max then

               Bad_Switch (Switch_Chars);

            end if;

            Ptr := Ptr + 1;

            Scan_Pos (Switch_Chars, Max, Ptr, Default_Exit_Status, C);

         --  Processing for y switch

         when 'y' =>

            Ptr := Ptr + 1;

            Leap_Seconds_Support := True;

         --  Processing for z switch

         when 'z' =>

            Ptr := Ptr + 1;

            No_Main_Subprogram := True;

         --  Processing for Z switch

         when 'Z' =>

            Ptr := Ptr + 1;

            Zero_Formatting := True;

         --  Processing for --RTS

         when '-' =>

            if Ptr + 4 <= Max and then

              Switch_Chars (Ptr + 1 .. Ptr + 3) = "RTS"

            then

               Ptr := Ptr + 4;

               if Switch_Chars (Ptr) /= '=' or else Ptr = Max then

                  Osint.Fail ("missing path for --RTS");

               else

                  --  Valid --RTS switch

                  Opt.No_Stdinc := True;

                  Opt.RTS_Switch := True;

                  declare

                     Src_Path_Name : constant String_Ptr :=

                                       Get_RTS_Search_Dir

                                         (Switch_Chars

                                           (Ptr + 1 .. Switch_Chars'Last),

                                          Include);

                     Lib_Path_Name : constant String_Ptr :=

                                       Get_RTS_Search_Dir

                                         (Switch_Chars

                                           (Ptr + 1 .. Switch_Chars'Last),

                                          Objects);

                  begin

                     if Src_Path_Name /= null and then

                       Lib_Path_Name /= null

                     then

                        --  Set the RTS_*_Path_Name variables, so that the

                        --  correct directories will be set when a subsequent

                        --  call Osint.Add_Default_Search_Dirs is made.

                        RTS_Src_Path_Name := Src_Path_Name;

                        RTS_Lib_Path_Name := Lib_Path_Name;

                        Ptr := Max + 1;

                     elsif  Src_Path_Name = null

                       and then Lib_Path_Name = null

                     then

                        Osint.Fail ("RTS path not valid: missing " &

                                    "adainclude and adalib directories");

                     elsif Src_Path_Name = null then

                        Osint.Fail ("RTS path not valid: missing " &

                                    "adainclude directory");

                     elsif  Lib_Path_Name = null then

                        Osint.Fail ("RTS path not valid: missing " &

                                    "adalib directory");

                     end if;

                  end;

               end if;

            else

               Bad_Switch (Switch_Chars);

            end if;

         --  Anything else is an error (illegal switch character)

         when others =>

            Bad_Switch (Switch_Chars);

         end case;

         if Ptr <= Max then

            Bad_Switch (Switch_Chars);

         end if;

      end Check_Switch;

   end Scan_Binder_Switches;

end Switch.B;