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 --          Copyright (C) 1992-2001 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- --
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  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,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, 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.Wide_Text_IO.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux;
  35 with Ada.Wide_Text_IO.Float_Aux;   use Ada.Wide_Text_IO.Float_Aux;
  36
  37 with System.Img_Dec; use System.Img_Dec;
  38 with System.Img_LLD; use System.Img_LLD;
  39 with System.Val_Dec; use System.Val_Dec;
  40 with System.Val_LLD; use System.Val_LLD;
  41
  42 package body Ada.Wide_Text_IO.Decimal_Aux is
  43
  44    -------------
  45    -- Get_Dec --
  46    -------------
  47
  48    function Get_Dec
  49      (File   : File_Type;
  50       Width  : Field;
  51       Scale  : Integer)
  52       return   Integer
  53    is
  54       Buf  : String (1 .. Field'Last);
  55       Ptr  : aliased Integer;
  56       Stop : Integer := 0;
  57       Item : Integer;
  58
  59    begin
  60       if Width /= 0 then
  61          Load_Width (File, Width, Buf, Stop);
  62          String_Skip (Buf, Ptr);
  63       else
  64          Load_Real (File, Buf, Stop);
  65          Ptr := 1;
  66       end if;
  67
  68       Item := Scan_Decimal (Buf, Ptr'Access, Stop, Scale);
  69       Check_End_Of_Field (Buf, Stop, Ptr, Width);
  70       return Item;
  71    end Get_Dec;
  72
  73    -------------
  74    -- Get_LLD --
  75    -------------
  76
  77    function Get_LLD
  78      (File   : File_Type;
  79       Width  : Field;
  80       Scale  : Integer)
  81       return   Long_Long_Integer
  82    is
  83       Buf  : String (1 .. Field'Last);
  84       Ptr  : aliased Integer;
  85       Stop : Integer := 0;
  86       Item : Long_Long_Integer;
  87
  88    begin
  89       if Width /= 0 then
  90          Load_Width (File, Width, Buf, Stop);
  91          String_Skip (Buf, Ptr);
  92       else
  93          Load_Real (File, Buf, Stop);
  94          Ptr := 1;
  95       end if;
  96
  97       Item := Scan_Long_Long_Decimal (Buf, Ptr'Access, Stop, Scale);
  98       Check_End_Of_Field (Buf, Stop, Ptr, Width);
  99       return Item;
 100    end Get_LLD;
 101
 102    --------------
 103    -- Gets_Dec --
 104    --------------
 105
 106    function Gets_Dec
 107      (From  : String;
 108       Last  : access Positive;
 109       Scale : Integer)
 110       return  Integer
 111    is
 112       Pos  : aliased Integer;
 113       Item : Integer;
 114
 115    begin
 116       String_Skip (From, Pos);
 117       Item := Scan_Decimal (From, Pos'Access, From'Last, Scale);
 118       Last.all := Pos - 1;
 119       return Item;
 120
 121    exception
 122       when Constraint_Error =>
 123          Last.all := Pos - 1;
 124          raise Data_Error;
 125
 126    end Gets_Dec;
 127
 128    --------------
 129    -- Gets_LLD --
 130    --------------
 131
 132    function Gets_LLD
 133      (From  : String;
 134       Last  : access Positive;
 135       Scale : Integer)
 136       return  Long_Long_Integer
 137    is
 138       Pos  : aliased Integer;
 139       Item : Long_Long_Integer;
 140
 141    begin
 142       String_Skip (From, Pos);
 143       Item := Scan_Long_Long_Decimal (From, Pos'Access, From'Last, Scale);
 144       Last.all := Pos - 1;
 145       return Item;
 146
 147    exception
 148       when Constraint_Error =>
 149          Last.all := Pos - 1;
 150          raise Data_Error;
 151
 152    end Gets_LLD;
 153
 154    -------------
 155    -- Put_Dec --
 156    -------------
 157
 158    procedure Put_Dec
 159      (File  : File_Type;
 160       Item  : Integer;
 161       Fore  : Field;
 162       Aft   : Field;
 163       Exp   : 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  : File_Type;
 180       Item  : Long_Long_Integer;
 181       Fore  : Field;
 182       Aft   : Field;
 183       Exp   : 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  : Integer;
 201       Aft   : Field;
 202       Exp   : 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  : Long_Long_Integer;
 236       Aft   : Field;
 237       Exp   : 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.Wide_Text_IO.Decimal_Aux;