gcc/ada/a-tiflio.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                 A D A . T E X T _ I O . F L O A T _ I O                  --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2009, 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 3,  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.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 with Ada.Text_IO.Float_Aux;
  33
  34 package body Ada.Text_IO.Float_IO is
  35
  36    package Aux renames Ada.Text_IO.Float_Aux;
  37
  38    ---------
  39    -- Get --
  40    ---------
  41
  42    procedure Get
  43      (File  : File_Type;
  44       Item  : out Num;
  45       Width : Field := 0)
  46    is
  47       pragma Unsuppress (Range_Check);
  48
  49    begin
  50       Aux.Get (File, Long_Long_Float (Item), Width);
  51
  52       --  In the case where the type is unconstrained (e.g. Standard'Float),
  53       --  the above conversion may result in an infinite value, which is
  54       --  normally fine for a conversion, but in this case, we want to treat
  55       --  that as a data error.
  56
  57       if not Item'Valid then
  58          raise Data_Error;
  59       end if;
  60
  61    exception
  62       when Constraint_Error => raise Data_Error;
  63    end Get;
  64
  65    procedure Get
  66      (Item  : out Num;
  67       Width : Field := 0)
  68    is
  69       pragma Unsuppress (Range_Check);
  70
  71    begin
  72       Aux.Get (Current_In, Long_Long_Float (Item), Width);
  73
  74       --  In the case where the type is unconstrained (e.g. Standard'Float),
  75       --  the above conversion may result in an infinite value, which is
  76       --  normally fine for a conversion, but in this case, we want to treat
  77       --  that as a data error.
  78
  79       if not Item'Valid then
  80          raise Data_Error;
  81       end if;
  82
  83    exception
  84       when Constraint_Error => raise Data_Error;
  85    end Get;
  86
  87    procedure Get
  88      (From : String;
  89       Item : out Num;
  90       Last : out Positive)
  91    is
  92       pragma Unsuppress (Range_Check);
  93
  94    begin
  95       Aux.Gets (From, Long_Long_Float (Item), Last);
  96
  97       --  In the case where the type is unconstrained (e.g. Standard'Float),
  98       --  the above conversion may result in an infinite value, which is
  99       --  normally fine for a conversion, but in this case, we want to treat
 100       --  that as a data error.
 101
 102       if not Item'Valid then
 103          raise Data_Error;
 104       end if;
 105
 106    exception
 107       when Constraint_Error => raise Data_Error;
 108    end Get;
 109
 110    ---------
 111    -- Put --
 112    ---------
 113
 114    procedure Put
 115      (File : File_Type;
 116       Item : Num;
 117       Fore : Field := Default_Fore;
 118       Aft  : Field := Default_Aft;
 119       Exp  : Field := Default_Exp)
 120    is
 121    begin
 122       Aux.Put (File, Long_Long_Float (Item), Fore, Aft, Exp);
 123    end Put;
 124
 125    procedure Put
 126      (Item : Num;
 127       Fore : Field := Default_Fore;
 128       Aft  : Field := Default_Aft;
 129       Exp  : Field := Default_Exp)
 130    is
 131    begin
 132       Aux.Put (Current_Out, Long_Long_Float (Item), Fore, Aft, Exp);
 133    end Put;
 134
 135    procedure Put
 136      (To   : out String;
 137       Item : Num;
 138       Aft  : Field := Default_Aft;
 139       Exp  : Field := Default_Exp)
 140    is
 141    begin
 142       Aux.Puts (To, Long_Long_Float (Item), Aft, Exp);
 143    end Put;
 144
 145 end Ada.Text_IO.Float_IO;