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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [a-ztflau.adb] - Blame information for rev 706

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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                        GNAT RUN-TIME COMPONENTS                          --
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--                                                                          --
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--      A D A . W I D E _ W I D E _ T E X T _ I O . F L O A T _ A U X       --
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--                                                                          --
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--                                 B o d y                                  --
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--                                                                          --
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--          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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--                                                                          --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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with Ada.Wide_Wide_Text_IO.Generic_Aux; use Ada.Wide_Wide_Text_IO.Generic_Aux;
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with System.Img_Real;  use System.Img_Real;
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with System.Val_Real;  use System.Val_Real;
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package body Ada.Wide_Wide_Text_IO.Float_Aux is
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   ---------
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   -- Get --
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   ---------
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   procedure Get
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     (File  : File_Type;
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      Item  : out Long_Long_Float;
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      Width : Field)
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   is
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      Buf  : String (1 .. Field'Last);
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      Stop : Integer := 0;
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      Ptr  : aliased Integer := 1;
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   begin
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      if Width /= 0 then
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         Load_Width (File, Width, Buf, Stop);
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         String_Skip (Buf, Ptr);
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      else
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         Load_Real (File, Buf, Stop);
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      end if;
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      Item := Scan_Real (Buf, Ptr'Access, Stop);
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      Check_End_Of_Field (Buf, Stop, Ptr, Width);
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   end Get;
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   ----------
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   -- Gets --
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   ----------
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   procedure Gets
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     (From : String;
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      Item : out Long_Long_Float;
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      Last : out Positive)
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   is
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      Pos : aliased Integer;
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   begin
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      String_Skip (From, Pos);
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      Item := Scan_Real (From, Pos'Access, From'Last);
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      Last := Pos - 1;
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   exception
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      when Constraint_Error =>
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         raise Data_Error;
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   end Gets;
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   ---------------
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   -- Load_Real --
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   ---------------
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   procedure Load_Real
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     (File : File_Type;
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      Buf  : out String;
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      Ptr  : in out Natural)
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   is
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      Loaded   : Boolean;
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   begin
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      --  Skip initial blanks and load possible sign
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      Load_Skip (File);
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      Load (File, Buf, Ptr, '+', '-');
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      --  Case of .nnnn
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      Load (File, Buf, Ptr, '.', Loaded);
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      if Loaded then
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         Load_Digits (File, Buf, Ptr, Loaded);
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         --  Hopeless junk if no digits loaded
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         if not Loaded then
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            return;
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         end if;
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      --  Otherwise must have digits to start
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      else
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         Load_Digits (File, Buf, Ptr, Loaded);
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         --  Hopeless junk if no digits loaded
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         if not Loaded then
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            return;
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         end if;
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         --  Based cases
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         Load (File, Buf, Ptr, '#', ':', Loaded);
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         if Loaded then
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            --  Case of nnn#.xxx#
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            Load (File, Buf, Ptr, '.', Loaded);
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            if Loaded then
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               Load_Extended_Digits (File, Buf, Ptr);
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               Load (File, Buf, Ptr, '#', ':');
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            --  Case of nnn#xxx.[xxx]# or nnn#xxx#
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            else
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               Load_Extended_Digits (File, Buf, Ptr);
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               Load (File, Buf, Ptr, '.', Loaded);
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               if Loaded then
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                  Load_Extended_Digits (File, Buf, Ptr);
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               end if;
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               --  As usual, it seems strange to allow mixed base characters,
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               --  but that is what ACVC tests expect, see CE3804M, case (3).
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               Load (File, Buf, Ptr, '#', ':');
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            end if;
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         --  Case of nnn.[nnn] or nnn
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         else
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            --  Prevent the potential processing of '.' in cases where the
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            --  initial digits have a trailing underscore.
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            if Buf (Ptr) = '_' then
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               return;
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            end if;
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            Load (File, Buf, Ptr, '.', Loaded);
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            if Loaded then
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               Load_Digits (File, Buf, Ptr);
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            end if;
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         end if;
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      end if;
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      --  Deal with exponent
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      Load (File, Buf, Ptr, 'E', 'e', Loaded);
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      if Loaded then
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         Load (File, Buf, Ptr, '+', '-');
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         Load_Digits (File, Buf, Ptr);
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      end if;
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   end Load_Real;
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   ---------
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   -- Put --
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   ---------
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   procedure Put
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     (File : File_Type;
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      Item : Long_Long_Float;
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      Fore : Field;
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      Aft  : Field;
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      Exp  : Field)
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   is
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      Buf : String (1 .. Field'Last);
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      Ptr : Natural := 0;
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   begin
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      Set_Image_Real (Item, Buf, Ptr, Fore, Aft, Exp);
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      Put_Item (File, Buf (1 .. Ptr));
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   end Put;
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   ----------
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   -- Puts --
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   ----------
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   procedure Puts
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     (To   : out String;
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      Item : Long_Long_Float;
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      Aft  : Field;
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      Exp  : Field)
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   is
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      Buf    : String (1 .. Field'Last);
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      Ptr    : Natural := 0;
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   begin
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      Set_Image_Real (Item, Buf, Ptr, Fore => 1, Aft => Aft, Exp => Exp);
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      if Ptr > To'Length then
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         raise Layout_Error;
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      else
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         for J in 1 .. Ptr loop
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            To (To'Last - Ptr + J) := Buf (J);
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         end loop;
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         for J in To'First .. To'Last - Ptr loop
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            To (J) := ' ';
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         end loop;
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      end if;
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   end Puts;
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end Ada.Wide_Wide_Text_IO.Float_Aux;

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