gcc/ada/a-wtinio.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME COMPONENTS                          --
   4 --                                                                          --
   5 --           A D A . W I D E _ T E X T _ I O . I N T E G E R _ I O          --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.7 $
  10 --                                                                          --
  11 --          Copyright (C) 1992-2000 Free Software Foundation, Inc.          --
  12 --                                                                          --
  13 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- As a special exception,  if other files  instantiate  generics from this --
  25 -- unit, or you link  this unit with other files  to produce an executable, --
  26 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  27 -- covered  by the  GNU  General  Public  License.  This exception does not --
  28 -- however invalidate  any other reasons why  the executable file  might be --
  29 -- covered by the  GNU Public License.                                      --
  30 --                                                                          --
  31 -- GNAT was originally developed  by the GNAT team at  New York University. --
  32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 with Ada.Wide_Text_IO.Integer_Aux;
  37 with System.WCh_Con; use System.WCh_Con;
  38 with System.WCh_WtS; use System.WCh_WtS;
  39
  40 package body Ada.Wide_Text_IO.Integer_IO is
  41
  42    Need_LLI : constant Boolean := Num'Base'Size > Integer'Size;
  43    --  Throughout this generic body, we distinguish between the case
  44    --  where type Integer is acceptable, and where a Long_Long_Integer
  45    --  is needed. This constant Boolean is used to test for these cases
  46    --  and since it is a constant, only the code for the relevant case
  47    --  will be included in the instance.
  48
  49    subtype TFT is Ada.Wide_Text_IO.File_Type;
  50    --  File type required for calls to routines in Aux
  51
  52    package Aux renames Ada.Wide_Text_IO.Integer_Aux;
  53
  54    ---------
  55    -- Get --
  56    ---------
  57
  58    procedure Get
  59      (File  : in File_Type;
  60       Item  : out Num;
  61       Width : in Field := 0)
  62    is
  63    begin
  64       if Need_LLI then
  65          Aux.Get_LLI (TFT (File), Long_Long_Integer (Item), Width);
  66       else
  67          Aux.Get_Int (TFT (File), Integer (Item), Width);
  68       end if;
  69
  70    exception
  71       when Constraint_Error => raise Data_Error;
  72    end Get;
  73
  74    procedure Get
  75      (Item  : out Num;
  76       Width : in Field := 0)
  77    is
  78    begin
  79       Get (Current_Input, Item, Width);
  80    end Get;
  81
  82    procedure Get
  83      (From : in Wide_String;
  84       Item : out Num;
  85       Last : out Positive)
  86    is
  87       S : constant String := Wide_String_To_String (From, WCEM_Upper);
  88       --  String on which we do the actual conversion. Note that the method
  89       --  used for wide character encoding is irrelevant, since if there is
  90       --  a character outside the Standard.Character range then the call to
  91       --  Aux.Gets will raise Data_Error in any case.
  92
  93    begin
  94       if Need_LLI then
  95          Aux.Gets_LLI (S, Long_Long_Integer (Item), Last);
  96       else
  97          Aux.Gets_Int (S, Integer (Item), Last);
  98       end if;
  99
 100    exception
 101       when Constraint_Error => raise Data_Error;
 102    end Get;
 103
 104    ---------
 105    -- Put --
 106    ---------
 107
 108    procedure Put
 109      (File  : in File_Type;
 110       Item  : in Num;
 111       Width : in Field := Default_Width;
 112       Base  : in Number_Base := Default_Base)
 113    is
 114    begin
 115       if Need_LLI then
 116          Aux.Put_LLI (TFT (File), Long_Long_Integer (Item), Width, Base);
 117       else
 118          Aux.Put_Int (TFT (File), Integer (Item), Width, Base);
 119       end if;
 120    end Put;
 121
 122    procedure Put
 123      (Item  : in Num;
 124       Width : in Field := Default_Width;
 125       Base  : in Number_Base := Default_Base)
 126    is
 127    begin
 128       Put (Current_Output, Item, Width, Base);
 129    end Put;
 130
 131    procedure Put
 132      (To   : out Wide_String;
 133       Item : in Num;
 134       Base : in Number_Base := Default_Base)
 135    is
 136       S : String (To'First .. To'Last);
 137
 138    begin
 139       if Need_LLI then
 140          Aux.Puts_LLI (S, Long_Long_Integer (Item), Base);
 141       else
 142          Aux.Puts_Int (S, Integer (Item), Base);
 143       end if;
 144
 145       for J in S'Range loop
 146          To (J) := Wide_Character'Val (Character'Pos (S (J)));
 147       end loop;
 148    end Put;
 149
 150 end Ada.Wide_Text_IO.Integer_IO;