gcc/ada/a-tideau.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME COMPONENTS                          --
   4 --                                                                          --
   5 --              A D A . T E X T _ I O . D E C I M A L _ A U X               --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.1 $
  10 --                                                                          --
  11 --          Copyright (C) 1992-2001 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 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 with Ada.Text_IO.Generic_Aux; use Ada.Text_IO.Generic_Aux;
  37 with Ada.Text_IO.Float_Aux;   use Ada.Text_IO.Float_Aux;
  38
  39 with System.Img_Dec; use System.Img_Dec;
  40 with System.Img_LLD; use System.Img_LLD;
  41 with System.Val_Dec; use System.Val_Dec;
  42 with System.Val_LLD; use System.Val_LLD;
  43
  44 package body Ada.Text_IO.Decimal_Aux is
  45
  46    -------------
  47    -- Get_Dec --
  48    -------------
  49
  50    function Get_Dec
  51      (File   : in File_Type;
  52       Width  : in Field;
  53       Scale  : Integer)
  54       return   Integer
  55    is
  56       Buf  : String (1 .. Field'Last);
  57       Ptr  : aliased Integer;
  58       Stop : Integer := 0;
  59       Item : Integer;
  60
  61    begin
  62       if Width /= 0 then
  63          Load_Width (File, Width, Buf, Stop);
  64          String_Skip (Buf, Ptr);
  65       else
  66          Load_Real (File, Buf, Stop);
  67          Ptr := 1;
  68       end if;
  69
  70       Item := Scan_Decimal (Buf, Ptr'Access, Stop, Scale);
  71       Check_End_Of_Field (File, Buf, Stop, Ptr, Width);
  72       return Item;
  73    end Get_Dec;
  74
  75    -------------
  76    -- Get_LLD --
  77    -------------
  78
  79    function Get_LLD
  80      (File   : in File_Type;
  81       Width  : in Field;
  82       Scale  : Integer)
  83       return   Long_Long_Integer
  84    is
  85       Buf  : String (1 .. Field'Last);
  86       Ptr  : aliased Integer;
  87       Stop : Integer := 0;
  88       Item : Long_Long_Integer;
  89
  90    begin
  91       if Width /= 0 then
  92          Load_Width (File, Width, Buf, Stop);
  93          String_Skip (Buf, Ptr);
  94       else
  95          Load_Real (File, Buf, Stop);
  96          Ptr := 1;
  97       end if;
  98
  99       Item := Scan_Long_Long_Decimal (Buf, Ptr'Access, Stop, Scale);
 100       Check_End_Of_Field (File, Buf, Stop, Ptr, Width);
 101       return Item;
 102    end Get_LLD;
 103
 104    --------------
 105    -- Gets_Dec --
 106    --------------
 107
 108    function Gets_Dec
 109      (From  : in String;
 110       Last  : access Positive;
 111       Scale : Integer)
 112       return  Integer
 113    is
 114       Pos  : aliased Integer;
 115       Item : Integer;
 116
 117    begin
 118       String_Skip (From, Pos);
 119       Item := Scan_Decimal (From, Pos'Access, From'Last, Scale);
 120       Last.all := Pos - 1;
 121       return Item;
 122
 123    exception
 124       when Constraint_Error =>
 125          Last.all := Pos - 1;
 126          raise Data_Error;
 127    end Gets_Dec;
 128
 129    --------------
 130    -- Gets_LLD --
 131    --------------
 132
 133    function Gets_LLD
 134      (From  : in String;
 135       Last  : access Positive;
 136       Scale : Integer)
 137       return  Long_Long_Integer
 138    is
 139       Pos  : aliased Integer;
 140       Item : Long_Long_Integer;
 141
 142    begin
 143       String_Skip (From, Pos);
 144       Item := Scan_Long_Long_Decimal (From, Pos'Access, From'Last, Scale);
 145       Last.all := Pos - 1;
 146       return Item;
 147
 148    exception
 149       when Constraint_Error =>
 150          Last.all := Pos - 1;
 151          raise Data_Error;
 152    end Gets_LLD;
 153
 154    -------------
 155    -- Put_Dec --
 156    -------------
 157
 158    procedure Put_Dec
 159      (File  : in File_Type;
 160       Item  : in Integer;
 161       Fore  : in Field;
 162       Aft   : in Field;
 163       Exp   : in Field;
 164       Scale : Integer)
 165    is
 166       Buf : String (1 .. Field'Last);
 167       Ptr : Natural := 0;
 168
 169    begin
 170       Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 171       Put_Item (File, Buf (1 .. Ptr));
 172    end Put_Dec;
 173
 174    -------------
 175    -- Put_LLD --
 176    -------------
 177
 178    procedure Put_LLD
 179      (File  : in File_Type;
 180       Item  : in Long_Long_Integer;
 181       Fore  : in Field;
 182       Aft   : in Field;
 183       Exp   : in Field;
 184       Scale : Integer)
 185    is
 186       Buf : String (1 .. Field'Last);
 187       Ptr : Natural := 0;
 188
 189    begin
 190       Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 191       Put_Item (File, Buf (1 .. Ptr));
 192    end Put_LLD;
 193
 194    --------------
 195    -- Puts_Dec --
 196    --------------
 197
 198    procedure Puts_Dec
 199      (To    : out String;
 200       Item  : in Integer;
 201       Aft   : in Field;
 202       Exp   : in Field;
 203       Scale : Integer)
 204    is
 205       Buf  : String (1 .. Field'Last);
 206       Fore : Integer;
 207       Ptr  : Natural := 0;
 208
 209    begin
 210       if Exp = 0 then
 211          Fore := To'Length - 1 - Aft;
 212       else
 213          Fore := To'Length - 2 - Aft - Exp;
 214       end if;
 215
 216       if Fore < 1 then
 217          raise Layout_Error;
 218       end if;
 219
 220       Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 221
 222       if Ptr > To'Length then
 223          raise Layout_Error;
 224       else
 225          To := Buf (1 .. Ptr);
 226       end if;
 227    end Puts_Dec;
 228
 229    --------------
 230    -- Puts_Dec --
 231    --------------
 232
 233    procedure Puts_LLD
 234      (To    : out String;
 235       Item  : in Long_Long_Integer;
 236       Aft   : in Field;
 237       Exp   : in Field;
 238       Scale : Integer)
 239    is
 240       Buf  : String (1 .. Field'Last);
 241       Fore : Integer;
 242       Ptr  : Natural := 0;
 243
 244    begin
 245       if Exp = 0 then
 246          Fore := To'Length - 1 - Aft;
 247       else
 248          Fore := To'Length - 2 - Aft - Exp;
 249       end if;
 250
 251       if Fore < 1 then
 252          raise Layout_Error;
 253       end if;
 254
 255       Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 256
 257       if Ptr > To'Length then
 258          raise Layout_Error;
 259       else
 260          To := Buf (1 .. Ptr);
 261       end if;
 262    end Puts_LLD;
 263
 264 end Ada.Text_IO.Decimal_Aux;