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

--                                                                          --

--                         GNAT RUN-TIME COMPONENTS                         --

--                                                                          --

--         A D A . W I D E _ T E X T _ I O . I N T E G E R  _ A U X         --

--                                                                          --

--                                 B o d y                                  --

--                                                                          --

--          Copyright (C) 1992-2009, 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.                                     --

--                                                                          --

-- As a special exception under Section 7 of GPL version 3, you are granted --

-- additional permissions described in the GCC Runtime Library Exception,   --

-- version 3.1, as published by the Free Software Foundation.               --

--                                                                          --

-- You should have received a copy of the GNU General Public License and    --

-- a copy of the GCC Runtime Library Exception along with this program;     --

-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --

-- <http://www.gnu.org/licenses/>.                                          --

--                                                                          --

-- GNAT was originally developed  by the GNAT team at  New York University. --

-- Extensive contributions were provided by Ada Core Technologies Inc.      --

--                                                                          --

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

with Ada.Wide_Text_IO.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux;

with System.Img_BIU; use System.Img_BIU;

with System.Img_Int; use System.Img_Int;

with System.Img_LLB; use System.Img_LLB;

with System.Img_LLI; use System.Img_LLI;

with System.Img_LLW; use System.Img_LLW;

with System.Img_WIU; use System.Img_WIU;

with System.Val_Int; use System.Val_Int;

with System.Val_LLI; use System.Val_LLI;

package body Ada.Wide_Text_IO.Integer_Aux is

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

   -- Local Subprograms --

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

   procedure Load_Integer

     (File : File_Type;

      Buf  : out String;

      Ptr  : in out Natural);

   --  This is an auxiliary routine that is used to load an possibly signed

   --  integer literal value from the input file into Buf, starting at Ptr + 1.

   --  On return, Ptr is set to the last character stored.

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

   -- Get_Int --

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

   procedure Get_Int

     (File  : File_Type;

      Item  : out Integer;

      Width : Field)

   is

      Buf  : String (1 .. Field'Last);

      Ptr  : aliased Integer := 1;

      Stop : Integer := 0;

   begin

      if Width /= 0 then

         Load_Width (File, Width, Buf, Stop);

         String_Skip (Buf, Ptr);

      else

         Load_Integer (File, Buf, Stop);

      end if;

      Item := Scan_Integer (Buf, Ptr'Access, Stop);

      Check_End_Of_Field (Buf, Stop, Ptr, Width);

   end Get_Int;

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

   -- Get_LLI --

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

   procedure Get_LLI

     (File  : File_Type;

      Item  : out Long_Long_Integer;

      Width : Field)

   is

      Buf  : String (1 .. Field'Last);

      Ptr  : aliased Integer := 1;

      Stop : Integer := 0;

   begin

      if Width /= 0 then

         Load_Width (File, Width, Buf, Stop);

         String_Skip (Buf, Ptr);

      else

         Load_Integer (File, Buf, Stop);

      end if;

      Item := Scan_Long_Long_Integer (Buf, Ptr'Access, Stop);

      Check_End_Of_Field (Buf, Stop, Ptr, Width);

   end Get_LLI;

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

   -- Gets_Int --

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

   procedure Gets_Int

     (From : String;

      Item : out Integer;

      Last : out Positive)

   is

      Pos : aliased Integer;

   begin

      String_Skip (From, Pos);

      Item := Scan_Integer (From, Pos'Access, From'Last);

      Last := Pos - 1;

   exception

      when Constraint_Error =>

         raise Data_Error;

   end Gets_Int;

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

   -- Gets_LLI --

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

   procedure Gets_LLI

     (From : String;

      Item : out Long_Long_Integer;

      Last : out Positive)

   is

      Pos : aliased Integer;

   begin

      String_Skip (From, Pos);

      Item := Scan_Long_Long_Integer (From, Pos'Access, From'Last);

      Last := Pos - 1;

   exception

      when Constraint_Error =>

         raise Data_Error;

   end Gets_LLI;

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

   -- Load_Integer --

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

   procedure Load_Integer

     (File : File_Type;

      Buf  : out String;

      Ptr  : in out Natural)

   is

      Hash_Loc : Natural;

      Loaded   : Boolean;

   begin

      Load_Skip (File);

      Load (File, Buf, Ptr, '+', '-');

      Load_Digits (File, Buf, Ptr, Loaded);

      if Loaded then

         Load (File, Buf, Ptr, '#', ':', Loaded);

         if Loaded then

            Hash_Loc := Ptr;

            Load_Extended_Digits (File, Buf, Ptr);

            Load (File, Buf, Ptr, Buf (Hash_Loc));

         end if;

         Load (File, Buf, Ptr, 'E', 'e', Loaded);

         if Loaded then

            --  Note: it is strange to allow a minus sign, since the syntax

            --  does not, but that is what ACVC test CE3704F, case (6) wants.

            Load (File, Buf, Ptr, '+', '-');

            Load_Digits (File, Buf, Ptr);

         end if;

      end if;

   end Load_Integer;

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

   -- Put_Int --

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

   procedure Put_Int

     (File  : File_Type;

      Item  : Integer;

      Width : Field;

      Base  : Number_Base)

   is

      Buf : String (1 .. Field'Last);

      Ptr : Natural := 0;

   begin

      if Base = 10 and then Width = 0 then

         Set_Image_Integer (Item, Buf, Ptr);

      elsif Base = 10 then

         Set_Image_Width_Integer (Item, Width, Buf, Ptr);

      else

         Set_Image_Based_Integer (Item, Base, Width, Buf, Ptr);

      end if;

      Put_Item (File, Buf (1 .. Ptr));

   end Put_Int;

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

   -- Put_LLI --

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

   procedure Put_LLI

     (File  : File_Type;

      Item  : Long_Long_Integer;

      Width : Field;

      Base  : Number_Base)

   is

      Buf : String (1 .. Field'Last);

      Ptr : Natural := 0;

   begin

      if Base = 10 and then Width = 0 then

         Set_Image_Long_Long_Integer (Item, Buf, Ptr);

      elsif Base = 10 then

         Set_Image_Width_Long_Long_Integer (Item, Width, Buf, Ptr);

      else

         Set_Image_Based_Long_Long_Integer (Item, Base, Width, Buf, Ptr);

      end if;

      Put_Item (File, Buf (1 .. Ptr));

   end Put_LLI;

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

   -- Puts_Int --

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

   procedure Puts_Int

     (To   : out String;

      Item : Integer;

      Base : Number_Base)

   is

      Buf : String (1 .. Field'Last);

      Ptr : Natural := 0;

   begin

      if Base = 10 then

         Set_Image_Width_Integer (Item, To'Length, Buf, Ptr);

      else

         Set_Image_Based_Integer (Item, Base, To'Length, Buf, Ptr);

      end if;

      if Ptr > To'Length then

         raise Layout_Error;

      else

         To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);

      end if;

   end Puts_Int;

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

   -- Puts_LLI --

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

   procedure Puts_LLI

     (To   : out String;

      Item : Long_Long_Integer;

      Base : Number_Base)

   is

      Buf : String (1 .. Field'Last);

      Ptr : Natural := 0;

   begin

      if Base = 10 then

         Set_Image_Width_Long_Long_Integer (Item, To'Length, Buf, Ptr);

      else

         Set_Image_Based_Long_Long_Integer (Item, Base, To'Length, Buf, Ptr);

      end if;

      if Ptr > To'Length then

         raise Layout_Error;

      else

         To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);

      end if;

   end Puts_LLI;

end Ada.Wide_Text_IO.Integer_Aux;