gcc/ada/s-vallld.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                       S Y S T E M . V A L _ L L D                        --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2006, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 with System.Val_Real; use System.Val_Real;
  35
  36 package body System.Val_LLD is
  37
  38    ----------------------------
  39    -- Scan_Long_Long_Decimal --
  40    ----------------------------
  41
  42    --  We use the floating-point circuit for now, this will be OK on a PC,
  43    --  but definitely does NOT have the required precision if the longest
  44    --  float type is IEEE double. This must be fixed in the future ???
  45
  46    function Scan_Long_Long_Decimal
  47      (Str   : String;
  48       Ptr   : not null access Integer;
  49       Max   : Integer;
  50       Scale : Integer) return Long_Long_Integer
  51    is
  52       Val : Long_Long_Float;
  53    begin
  54       Val := Scan_Real (Str, Ptr, Max);
  55       return Long_Long_Integer (Val * 10.0 ** Scale);
  56    end Scan_Long_Long_Decimal;
  57
  58    -----------------------------
  59    -- Value_Long_Long_Decimal --
  60    -----------------------------
  61
  62    --  Again we cheat and use floating-point ???
  63
  64    function Value_Long_Long_Decimal
  65      (Str   : String;
  66       Scale : Integer) return Long_Long_Integer
  67    is
  68    begin
  69       return Long_Long_Integer (Value_Real (Str) * 10.0 ** Scale);
  70    end Value_Long_Long_Decimal;
  71
  72 end System.Val_LLD;