gcc/ada/a-wtdeau.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME COMPONENTS                          --
   4 --                                                                          --
   5 --         A D A . W I D E _ 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: 1.3 $
  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 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 with Ada.Wide_Text_IO.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux;
  37 with Ada.Wide_Text_IO.Float_Aux;   use Ada.Wide_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.Wide_Text_IO.Decimal_Aux is
  45
  46    -------------
  47    -- Get_Dec --
  48    -------------
  49
  50    function Get_Dec
  51      (File   : File_Type;
  52       Width  : 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   : File_Type;
  81       Width  : 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  : 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
 128    end Gets_Dec;
 129
 130    --------------
 131    -- Gets_LLD --
 132    --------------
 133
 134    function Gets_LLD
 135      (From  : String;
 136       Last  : access Positive;
 137       Scale : Integer)
 138       return  Long_Long_Integer
 139    is
 140       Pos  : aliased Integer;
 141       Item : Long_Long_Integer;
 142
 143    begin
 144       String_Skip (From, Pos);
 145       Item := Scan_Long_Long_Decimal (From, Pos'Access, From'Last, Scale);
 146       Last.all := Pos - 1;
 147       return Item;
 148
 149    exception
 150       when Constraint_Error =>
 151          Last.all := Pos - 1;
 152          raise Data_Error;
 153
 154    end Gets_LLD;
 155
 156    -------------
 157    -- Put_Dec --
 158    -------------
 159
 160    procedure Put_Dec
 161      (File  : File_Type;
 162       Item  : Integer;
 163       Fore  : Field;
 164       Aft   : Field;
 165       Exp   : Field;
 166       Scale : Integer)
 167    is
 168       Buf : String (1 .. Field'Last);
 169       Ptr : Natural := 0;
 170
 171    begin
 172       Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 173       Put_Item (File, Buf (1 .. Ptr));
 174    end Put_Dec;
 175
 176    -------------
 177    -- Put_LLD --
 178    -------------
 179
 180    procedure Put_LLD
 181      (File  : File_Type;
 182       Item  : Long_Long_Integer;
 183       Fore  : Field;
 184       Aft   : Field;
 185       Exp   : Field;
 186       Scale : Integer)
 187    is
 188       Buf : String (1 .. Field'Last);
 189       Ptr : Natural := 0;
 190
 191    begin
 192       Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 193       Put_Item (File, Buf (1 .. Ptr));
 194    end Put_LLD;
 195
 196    --------------
 197    -- Puts_Dec --
 198    --------------
 199
 200    procedure Puts_Dec
 201      (To    : out String;
 202       Item  : Integer;
 203       Aft   : Field;
 204       Exp   : Field;
 205       Scale : Integer)
 206    is
 207       Buf  : String (1 .. Field'Last);
 208       Fore : Integer;
 209       Ptr  : Natural := 0;
 210
 211    begin
 212       if Exp = 0 then
 213          Fore := To'Length - 1 - Aft;
 214       else
 215          Fore := To'Length - 2 - Aft - Exp;
 216       end if;
 217
 218       if Fore < 1 then
 219          raise Layout_Error;
 220       end if;
 221
 222       Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 223
 224       if Ptr > To'Length then
 225          raise Layout_Error;
 226       else
 227          To := Buf (1 .. Ptr);
 228       end if;
 229    end Puts_Dec;
 230
 231    --------------
 232    -- Puts_Dec --
 233    --------------
 234
 235    procedure Puts_LLD
 236      (To    : out String;
 237       Item  : Long_Long_Integer;
 238       Aft   : Field;
 239       Exp   : Field;
 240       Scale : Integer)
 241    is
 242       Buf  : String (1 .. Field'Last);
 243       Fore : Integer;
 244       Ptr  : Natural := 0;
 245
 246    begin
 247       if Exp = 0 then
 248          Fore := To'Length - 1 - Aft;
 249       else
 250          Fore := To'Length - 2 - Aft - Exp;
 251       end if;
 252
 253       if Fore < 1 then
 254          raise Layout_Error;
 255       end if;
 256
 257       Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 258
 259       if Ptr > To'Length then
 260          raise Layout_Error;
 261       else
 262          To := Buf (1 .. Ptr);
 263       end if;
 264    end Puts_LLD;
 265
 266 end Ada.Wide_Text_IO.Decimal_Aux;