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 --                                                                          --
  10 --          Copyright (C) 1992-2001 Free Software Foundation, Inc.          --
  11 --                                                                          --
  12 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
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  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNAT was originally developed  by the GNAT team at  New York University. --
  31 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 with Ada.Wide_Text_IO.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux;
  36 with Ada.Wide_Text_IO.Float_Aux;   use Ada.Wide_Text_IO.Float_Aux;
  37
  38 with System.Img_Dec; use System.Img_Dec;
  39 with System.Img_LLD; use System.Img_LLD;
  40 with System.Val_Dec; use System.Val_Dec;
  41 with System.Val_LLD; use System.Val_LLD;
  42
  43 package body Ada.Wide_Text_IO.Decimal_Aux is
  44
  45    -------------
  46    -- Get_Dec --
  47    -------------
  48
  49    function Get_Dec
  50      (File   : File_Type;
  51       Width  : Field;
  52       Scale  : Integer)
  53       return   Integer
  54    is
  55       Buf  : String (1 .. Field'Last);
  56       Ptr  : aliased Integer;
  57       Stop : Integer := 0;
  58       Item : Integer;
  59
  60    begin
  61       if Width /= 0 then
  62          Load_Width (File, Width, Buf, Stop);
  63          String_Skip (Buf, Ptr);
  64       else
  65          Load_Real (File, Buf, Stop);
  66          Ptr := 1;
  67       end if;
  68
  69       Item := Scan_Decimal (Buf, Ptr'Access, Stop, Scale);
  70       Check_End_Of_Field (Buf, Stop, Ptr, Width);
  71       return Item;
  72    end Get_Dec;
  73
  74    -------------
  75    -- Get_LLD --
  76    -------------
  77
  78    function Get_LLD
  79      (File   : File_Type;
  80       Width  : Field;
  81       Scale  : Integer)
  82       return   Long_Long_Integer
  83    is
  84       Buf  : String (1 .. Field'Last);
  85       Ptr  : aliased Integer;
  86       Stop : Integer := 0;
  87       Item : Long_Long_Integer;
  88
  89    begin
  90       if Width /= 0 then
  91          Load_Width (File, Width, Buf, Stop);
  92          String_Skip (Buf, Ptr);
  93       else
  94          Load_Real (File, Buf, Stop);
  95          Ptr := 1;
  96       end if;
  97
  98       Item := Scan_Long_Long_Decimal (Buf, Ptr'Access, Stop, Scale);
  99       Check_End_Of_Field (Buf, Stop, Ptr, Width);
 100       return Item;
 101    end Get_LLD;
 102
 103    --------------
 104    -- Gets_Dec --
 105    --------------
 106
 107    function Gets_Dec
 108      (From  : String;
 109       Last  : access Positive;
 110       Scale : Integer)
 111       return  Integer
 112    is
 113       Pos  : aliased Integer;
 114       Item : Integer;
 115
 116    begin
 117       String_Skip (From, Pos);
 118       Item := Scan_Decimal (From, Pos'Access, From'Last, Scale);
 119       Last.all := Pos - 1;
 120       return Item;
 121
 122    exception
 123       when Constraint_Error =>
 124          Last.all := Pos - 1;
 125          raise Data_Error;
 126
 127    end Gets_Dec;
 128
 129    --------------
 130    -- Gets_LLD --
 131    --------------
 132
 133    function Gets_LLD
 134      (From  : 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
 153    end Gets_LLD;
 154
 155    -------------
 156    -- Put_Dec --
 157    -------------
 158
 159    procedure Put_Dec
 160      (File  : File_Type;
 161       Item  : Integer;
 162       Fore  : Field;
 163       Aft   : Field;
 164       Exp   : Field;
 165       Scale : Integer)
 166    is
 167       Buf : String (1 .. Field'Last);
 168       Ptr : Natural := 0;
 169
 170    begin
 171       Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 172       Put_Item (File, Buf (1 .. Ptr));
 173    end Put_Dec;
 174
 175    -------------
 176    -- Put_LLD --
 177    -------------
 178
 179    procedure Put_LLD
 180      (File  : File_Type;
 181       Item  : Long_Long_Integer;
 182       Fore  : Field;
 183       Aft   : Field;
 184       Exp   : Field;
 185       Scale : Integer)
 186    is
 187       Buf : String (1 .. Field'Last);
 188       Ptr : Natural := 0;
 189
 190    begin
 191       Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 192       Put_Item (File, Buf (1 .. Ptr));
 193    end Put_LLD;
 194
 195    --------------
 196    -- Puts_Dec --
 197    --------------
 198
 199    procedure Puts_Dec
 200      (To    : out String;
 201       Item  : Integer;
 202       Aft   : Field;
 203       Exp   : Field;
 204       Scale : Integer)
 205    is
 206       Buf  : String (1 .. Field'Last);
 207       Fore : Integer;
 208       Ptr  : Natural := 0;
 209
 210    begin
 211       if Exp = 0 then
 212          Fore := To'Length - 1 - Aft;
 213       else
 214          Fore := To'Length - 2 - Aft - Exp;
 215       end if;
 216
 217       if Fore < 1 then
 218          raise Layout_Error;
 219       end if;
 220
 221       Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 222
 223       if Ptr > To'Length then
 224          raise Layout_Error;
 225       else
 226          To := Buf (1 .. Ptr);
 227       end if;
 228    end Puts_Dec;
 229
 230    --------------
 231    -- Puts_Dec --
 232    --------------
 233
 234    procedure Puts_LLD
 235      (To    : out String;
 236       Item  : Long_Long_Integer;
 237       Aft   : Field;
 238       Exp   : Field;
 239       Scale : Integer)
 240    is
 241       Buf  : String (1 .. Field'Last);
 242       Fore : Integer;
 243       Ptr  : Natural := 0;
 244
 245    begin
 246       if Exp = 0 then
 247          Fore := To'Length - 1 - Aft;
 248       else
 249          Fore := To'Length - 2 - Aft - Exp;
 250       end if;
 251
 252       if Fore < 1 then
 253          raise Layout_Error;
 254       end if;
 255
 256       Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 257
 258       if Ptr > To'Length then
 259          raise Layout_Error;
 260       else
 261          To := Buf (1 .. Ptr);
 262       end if;
 263    end Puts_LLD;
 264
 265 end Ada.Wide_Text_IO.Decimal_Aux;