gcc/ada/a-wtdeau.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME 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) 1992-2006, 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,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, 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) return Integer
  52    is
  53       Buf  : String (1 .. Field'Last);
  54       Ptr  : aliased Integer;
  55       Stop : Integer := 0;
  56       Item : Integer;
  57
  58    begin
  59       if Width /= 0 then
  60          Load_Width (File, Width, Buf, Stop);
  61          String_Skip (Buf, Ptr);
  62       else
  63          Load_Real (File, Buf, Stop);
  64          Ptr := 1;
  65       end if;
  66
  67       Item := Scan_Decimal (Buf, Ptr'Access, Stop, Scale);
  68       Check_End_Of_Field (Buf, Stop, Ptr, Width);
  69       return Item;
  70    end Get_Dec;
  71
  72    -------------
  73    -- Get_LLD --
  74    -------------
  75
  76    function Get_LLD
  77      (File  : File_Type;
  78       Width : Field;
  79       Scale : Integer) return Long_Long_Integer
  80    is
  81       Buf  : String (1 .. Field'Last);
  82       Ptr  : aliased Integer;
  83       Stop : Integer := 0;
  84       Item : Long_Long_Integer;
  85
  86    begin
  87       if Width /= 0 then
  88          Load_Width (File, Width, Buf, Stop);
  89          String_Skip (Buf, Ptr);
  90       else
  91          Load_Real (File, Buf, Stop);
  92          Ptr := 1;
  93       end if;
  94
  95       Item := Scan_Long_Long_Decimal (Buf, Ptr'Access, Stop, Scale);
  96       Check_End_Of_Field (Buf, Stop, Ptr, Width);
  97       return Item;
  98    end Get_LLD;
  99
 100    --------------
 101    -- Gets_Dec --
 102    --------------
 103
 104    function Gets_Dec
 105      (From  : String;
 106       Last  : access Positive;
 107       Scale : Integer) return Integer
 108    is
 109       Pos  : aliased Integer;
 110       Item : Integer;
 111
 112    begin
 113       String_Skip (From, Pos);
 114       Item := Scan_Decimal (From, Pos'Access, From'Last, Scale);
 115       Last.all := Pos - 1;
 116       return Item;
 117
 118    exception
 119       when Constraint_Error =>
 120          Last.all := Pos - 1;
 121          raise Data_Error;
 122
 123    end Gets_Dec;
 124
 125    --------------
 126    -- Gets_LLD --
 127    --------------
 128
 129    function Gets_LLD
 130      (From  : String;
 131       Last  : access Positive;
 132       Scale : Integer) return Long_Long_Integer
 133    is
 134       Pos  : aliased Integer;
 135       Item : Long_Long_Integer;
 136
 137    begin
 138       String_Skip (From, Pos);
 139       Item := Scan_Long_Long_Decimal (From, Pos'Access, From'Last, Scale);
 140       Last.all := Pos - 1;
 141       return Item;
 142
 143    exception
 144       when Constraint_Error =>
 145          Last.all := Pos - 1;
 146          raise Data_Error;
 147
 148    end Gets_LLD;
 149
 150    -------------
 151    -- Put_Dec --
 152    -------------
 153
 154    procedure Put_Dec
 155      (File  : File_Type;
 156       Item  : Integer;
 157       Fore  : Field;
 158       Aft   : Field;
 159       Exp   : Field;
 160       Scale : Integer)
 161    is
 162       Buf : String (1 .. Field'Last);
 163       Ptr : Natural := 0;
 164
 165    begin
 166       Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 167       Put_Item (File, Buf (1 .. Ptr));
 168    end Put_Dec;
 169
 170    -------------
 171    -- Put_LLD --
 172    -------------
 173
 174    procedure Put_LLD
 175      (File  : File_Type;
 176       Item  : Long_Long_Integer;
 177       Fore  : Field;
 178       Aft   : Field;
 179       Exp   : Field;
 180       Scale : Integer)
 181    is
 182       Buf : String (1 .. Field'Last);
 183       Ptr : Natural := 0;
 184
 185    begin
 186       Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 187       Put_Item (File, Buf (1 .. Ptr));
 188    end Put_LLD;
 189
 190    --------------
 191    -- Puts_Dec --
 192    --------------
 193
 194    procedure Puts_Dec
 195      (To    : out String;
 196       Item  : Integer;
 197       Aft   : Field;
 198       Exp   : Field;
 199       Scale : Integer)
 200    is
 201       Buf  : String (1 .. Field'Last);
 202       Fore : Integer;
 203       Ptr  : Natural := 0;
 204
 205    begin
 206       if Exp = 0 then
 207          Fore := To'Length - 1 - Aft;
 208       else
 209          Fore := To'Length - 2 - Aft - Exp;
 210       end if;
 211
 212       if Fore < 1 then
 213          raise Layout_Error;
 214       end if;
 215
 216       Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 217
 218       if Ptr > To'Length then
 219          raise Layout_Error;
 220       else
 221          To := Buf (1 .. Ptr);
 222       end if;
 223    end Puts_Dec;
 224
 225    --------------
 226    -- Puts_Dec --
 227    --------------
 228
 229    procedure Puts_LLD
 230      (To    : out String;
 231       Item  : Long_Long_Integer;
 232       Aft   : Field;
 233       Exp   : Field;
 234       Scale : Integer)
 235    is
 236       Buf  : String (1 .. Field'Last);
 237       Fore : Integer;
 238       Ptr  : Natural := 0;
 239
 240    begin
 241       if Exp = 0 then
 242          Fore := To'Length - 1 - Aft;
 243       else
 244          Fore := To'Length - 2 - Aft - Exp;
 245       end if;
 246
 247       if Fore < 1 then
 248          raise Layout_Error;
 249       end if;
 250
 251       Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 252
 253       if Ptr > To'Length then
 254          raise Layout_Error;
 255       else
 256          To := Buf (1 .. Ptr);
 257       end if;
 258    end Puts_LLD;
 259
 260 end Ada.Wide_Text_IO.Decimal_Aux;