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) 1992-2005 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 Ada.Text_IO.Float_Aux;
  35
  36 package body Ada.Text_IO.Float_IO is
  37
  38    package Aux renames Ada.Text_IO.Float_Aux;
  39
  40    ---------
  41    -- Get --
  42    ---------
  43
  44    procedure Get
  45      (File  : in File_Type;
  46       Item  : out Num;
  47       Width : in Field := 0)
  48    is
  49       pragma Unsuppress (Range_Check);
  50
  51    begin
  52       Aux.Get (File, Long_Long_Float (Item), Width);
  53
  54       --  In the case where the type is unconstrained (e.g. Standard'Float),
  55       --  the above conversion may result in an infinite value, which is
  56       --  normally fine for a conversion, but in this case, we want to treat
  57       --  that as a data error.
  58
  59       if not Item'Valid then
  60          raise Data_Error;
  61       end if;
  62
  63    exception
  64       when Constraint_Error => raise Data_Error;
  65    end Get;
  66
  67    procedure Get
  68      (Item  : out Num;
  69       Width : in Field := 0)
  70    is
  71       pragma Unsuppress (Range_Check);
  72
  73    begin
  74       Aux.Get (Current_In, Long_Long_Float (Item), Width);
  75
  76       --  In the case where the type is unconstrained (e.g. Standard'Float),
  77       --  the above conversion may result in an infinite value, which is
  78       --  normally fine for a conversion, but in this case, we want to treat
  79       --  that as a data error.
  80
  81       if not Item'Valid then
  82          raise Data_Error;
  83       end if;
  84
  85    exception
  86       when Constraint_Error => raise Data_Error;
  87    end Get;
  88
  89    procedure Get
  90      (From : in String;
  91       Item : out Num;
  92       Last : out Positive)
  93    is
  94       pragma Unsuppress (Range_Check);
  95
  96    begin
  97       Aux.Gets (From, Long_Long_Float (Item), Last);
  98
  99       --  In the case where the type is unconstrained (e.g. Standard'Float),
 100       --  the above conversion may result in an infinite value, which is
 101       --  normally fine for a conversion, but in this case, we want to treat
 102       --  that as a data error.
 103
 104       if not Item'Valid then
 105          raise Data_Error;
 106       end if;
 107
 108    exception
 109       when Constraint_Error => raise Data_Error;
 110    end Get;
 111
 112    ---------
 113    -- Put --
 114    ---------
 115
 116    procedure Put
 117      (File : in File_Type;
 118       Item : in Num;
 119       Fore : in Field := Default_Fore;
 120       Aft  : in Field := Default_Aft;
 121       Exp  : in Field := Default_Exp)
 122    is
 123    begin
 124       Aux.Put (File, Long_Long_Float (Item), Fore, Aft, Exp);
 125    end Put;
 126
 127    procedure Put
 128      (Item : in Num;
 129       Fore : in Field := Default_Fore;
 130       Aft  : in Field := Default_Aft;
 131       Exp  : in Field := Default_Exp)
 132    is
 133    begin
 134       Aux.Put (Current_Out, Long_Long_Float (Item), Fore, Aft, Exp);
 135    end Put;
 136
 137    procedure Put
 138      (To   : out String;
 139       Item : in Num;
 140       Aft  : in Field := Default_Aft;
 141       Exp  : in Field := Default_Exp)
 142    is
 143    begin
 144       Aux.Puts (To, Long_Long_Float (Item), Aft, Exp);
 145    end Put;
 146
 147 end Ada.Text_IO.Float_IO;