gcc/ada/a-wtcoio.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME COMPONENTS                          --
   4 --                                                                          --
   5 --           A D A . W I D E _ T E X T _ IO . C O M P L E X _ I O           --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.4 $                              --
  10 --                                                                          --
  11 --   Copyright (C) 1992,1993,1994,1995,1996 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.Complex_Aux;
  37 with System.WCh_Con; use System.WCh_Con;
  38 with System.WCh_WtS; use System.WCh_WtS;
  39
  40 with Ada.Unchecked_Conversion;
  41
  42 package body Ada.Wide_Text_IO.Complex_IO is
  43
  44    package Aux renames Ada.Wide_Text_IO.Complex_Aux;
  45
  46    subtype LLF is Long_Long_Float;
  47    --  Type used for calls to routines in Aux
  48
  49 --   subtype TFT is Ada.Wide_Text_IO.File_Type;
  50    --  File type required for calls to routines in Aux
  51
  52    function TFT is new
  53      Ada.Unchecked_Conversion (File_Type, Ada.Wide_Text_IO.File_Type);
  54    --  This unchecked conversion is to get around a visibility bug in
  55    --  GNAT version 2.04w. It should be possible to simply use the
  56    --  subtype declared above and do normal checked conversions.
  57
  58    ---------
  59    -- Get --
  60    ---------
  61
  62    procedure Get
  63      (File  : in  File_Type;
  64       Item  : out Complex;
  65       Width : in  Field := 0)
  66    is
  67       Real_Item  : Real'Base;
  68       Imag_Item  : Real'Base;
  69
  70    begin
  71       Aux.Get (TFT (File), LLF (Real_Item), LLF (Imag_Item), Width);
  72       Item := (Real_Item, Imag_Item);
  73
  74    exception
  75       when Constraint_Error => raise Data_Error;
  76    end Get;
  77
  78    ---------
  79    -- Get --
  80    ---------
  81
  82    procedure Get
  83      (Item  : out Complex;
  84       Width : in  Field := 0)
  85    is
  86    begin
  87       Get (Current_Input, Item, Width);
  88    end Get;
  89
  90    ---------
  91    -- Get --
  92    ---------
  93
  94    procedure Get
  95      (From : in  Wide_String;
  96       Item : out Complex;
  97       Last : out Positive)
  98    is
  99       Real_Item : Real'Base;
 100       Imag_Item : Real'Base;
 101
 102       S : constant String := Wide_String_To_String (From, WCEM_Upper);
 103       --  String on which we do the actual conversion. Note that the method
 104       --  used for wide character encoding is irrelevant, since if there is
 105       --  a character outside the Standard.Character range then the call to
 106       --  Aux.Gets will raise Data_Error in any case.
 107
 108    begin
 109       Aux.Gets (S, LLF (Real_Item), LLF (Imag_Item), Last);
 110       Item := (Real_Item, Imag_Item);
 111
 112    exception
 113       when Data_Error => raise Constraint_Error;
 114    end Get;
 115
 116    ---------
 117    -- Put --
 118    ---------
 119
 120    procedure Put
 121      (File : in File_Type;
 122       Item : in Complex;
 123       Fore : in Field := Default_Fore;
 124       Aft  : in Field := Default_Aft;
 125       Exp  : in Field := Default_Exp)
 126    is
 127    begin
 128       Aux.Put (TFT (File), LLF (Re (Item)), LLF (Im (Item)), Fore, Aft, Exp);
 129    end Put;
 130
 131    ---------
 132    -- Put --
 133    ---------
 134
 135    procedure Put
 136      (Item : in Complex;
 137       Fore : in Field := Default_Fore;
 138       Aft  : in Field := Default_Aft;
 139       Exp  : in Field := Default_Exp)
 140    is
 141    begin
 142       Put (Current_Output, Item, Fore, Aft, Exp);
 143    end Put;
 144
 145    ---------
 146    -- Put --
 147    ---------
 148
 149    procedure Put
 150      (To   : out Wide_String;
 151       Item : in  Complex;
 152       Aft  : in  Field := Default_Aft;
 153       Exp  : in  Field := Default_Exp)
 154    is
 155       S : String (To'First .. To'Last);
 156
 157    begin
 158       Aux.Puts (S, LLF (Re (Item)), LLF (Im (Item)), Aft, Exp);
 159
 160       for J in S'Range loop
 161          To (J) := Wide_Character'Val (Character'Pos (S (J)));
 162       end loop;
 163    end Put;
 164
 165 end Ada.Wide_Text_IO.Complex_IO;