gcc/ada/a-tideau.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME 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 --          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- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  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.Text_IO.Generic_Aux; use Ada.Text_IO.Generic_Aux;
  35 with Ada.Text_IO.Float_Aux;   use Ada.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.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    end Gets_Dec;
 123
 124    --------------
 125    -- Gets_LLD --
 126    --------------
 127
 128    function Gets_LLD
 129      (From  : String;
 130       Last  : access Positive;
 131       Scale : Integer) return Long_Long_Integer
 132    is
 133       Pos  : aliased Integer;
 134       Item : Long_Long_Integer;
 135
 136    begin
 137       String_Skip (From, Pos);
 138       Item := Scan_Long_Long_Decimal (From, Pos'Access, From'Last, Scale);
 139       Last.all := Pos - 1;
 140       return Item;
 141
 142    exception
 143       when Constraint_Error =>
 144          Last.all := Pos - 1;
 145          raise Data_Error;
 146    end Gets_LLD;
 147
 148    -------------
 149    -- Put_Dec --
 150    -------------
 151
 152    procedure Put_Dec
 153      (File  : File_Type;
 154       Item  : Integer;
 155       Fore  : Field;
 156       Aft   : Field;
 157       Exp   : Field;
 158       Scale : Integer)
 159    is
 160       Buf : String (1 .. Field'Last);
 161       Ptr : Natural := 0;
 162
 163    begin
 164       Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 165       Put_Item (File, Buf (1 .. Ptr));
 166    end Put_Dec;
 167
 168    -------------
 169    -- Put_LLD --
 170    -------------
 171
 172    procedure Put_LLD
 173      (File  : File_Type;
 174       Item  : Long_Long_Integer;
 175       Fore  : Field;
 176       Aft   : Field;
 177       Exp   : Field;
 178       Scale : Integer)
 179    is
 180       Buf : String (1 .. Field'Last);
 181       Ptr : Natural := 0;
 182
 183    begin
 184       Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 185       Put_Item (File, Buf (1 .. Ptr));
 186    end Put_LLD;
 187
 188    --------------
 189    -- Puts_Dec --
 190    --------------
 191
 192    procedure Puts_Dec
 193      (To    : out String;
 194       Item  : Integer;
 195       Aft   : Field;
 196       Exp   : Field;
 197       Scale : Integer)
 198    is
 199       Buf  : String (1 .. Field'Last);
 200       Fore : Integer;
 201       Ptr  : Natural := 0;
 202
 203    begin
 204       if Exp = 0 then
 205          Fore := To'Length - 1 - Aft;
 206       else
 207          Fore := To'Length - 2 - Aft - Exp;
 208       end if;
 209
 210       if Fore < 1 then
 211          raise Layout_Error;
 212       end if;
 213
 214       Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 215
 216       if Ptr > To'Length then
 217          raise Layout_Error;
 218       else
 219          To := Buf (1 .. Ptr);
 220       end if;
 221    end Puts_Dec;
 222
 223    --------------
 224    -- Puts_Dec --
 225    --------------
 226
 227    procedure Puts_LLD
 228      (To    : out String;
 229       Item  : Long_Long_Integer;
 230       Aft   : Field;
 231       Exp   : Field;
 232       Scale : Integer)
 233    is
 234       Buf  : String (1 .. Field'Last);
 235       Fore : Integer;
 236       Ptr  : Natural := 0;
 237
 238    begin
 239       if Exp = 0 then
 240          Fore := To'Length - 1 - Aft;
 241       else
 242          Fore := To'Length - 2 - Aft - Exp;
 243       end if;
 244
 245       if Fore < 1 then
 246          raise Layout_Error;
 247       end if;
 248
 249       Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 250
 251       if Ptr > To'Length then
 252          raise Layout_Error;
 253       else
 254          To := Buf (1 .. Ptr);
 255       end if;
 256    end Puts_LLD;
 257
 258 end Ada.Text_IO.Decimal_Aux;