gcc/ada/a-tideau.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME 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) 1992-2001 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- --
  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,  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.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   : in File_Type;
  50       Width  : in 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   : in File_Type;
  79       Width  : in 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  : in 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    end Gets_Dec;
 126
 127    --------------
 128    -- Gets_LLD --
 129    --------------
 130
 131    function Gets_LLD
 132      (From  : in String;
 133       Last  : access Positive;
 134       Scale : Integer)
 135       return  Long_Long_Integer
 136    is
 137       Pos  : aliased Integer;
 138       Item : Long_Long_Integer;
 139
 140    begin
 141       String_Skip (From, Pos);
 142       Item := Scan_Long_Long_Decimal (From, Pos'Access, From'Last, Scale);
 143       Last.all := Pos - 1;
 144       return Item;
 145
 146    exception
 147       when Constraint_Error =>
 148          Last.all := Pos - 1;
 149          raise Data_Error;
 150    end Gets_LLD;
 151
 152    -------------
 153    -- Put_Dec --
 154    -------------
 155
 156    procedure Put_Dec
 157      (File  : in File_Type;
 158       Item  : in Integer;
 159       Fore  : in Field;
 160       Aft   : in Field;
 161       Exp   : in Field;
 162       Scale : Integer)
 163    is
 164       Buf : String (1 .. Field'Last);
 165       Ptr : Natural := 0;
 166
 167    begin
 168       Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 169       Put_Item (File, Buf (1 .. Ptr));
 170    end Put_Dec;
 171
 172    -------------
 173    -- Put_LLD --
 174    -------------
 175
 176    procedure Put_LLD
 177      (File  : in File_Type;
 178       Item  : in Long_Long_Integer;
 179       Fore  : in Field;
 180       Aft   : in Field;
 181       Exp   : in Field;
 182       Scale : Integer)
 183    is
 184       Buf : String (1 .. Field'Last);
 185       Ptr : Natural := 0;
 186
 187    begin
 188       Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 189       Put_Item (File, Buf (1 .. Ptr));
 190    end Put_LLD;
 191
 192    --------------
 193    -- Puts_Dec --
 194    --------------
 195
 196    procedure Puts_Dec
 197      (To    : out String;
 198       Item  : in Integer;
 199       Aft   : in Field;
 200       Exp   : in Field;
 201       Scale : Integer)
 202    is
 203       Buf  : String (1 .. Field'Last);
 204       Fore : Integer;
 205       Ptr  : Natural := 0;
 206
 207    begin
 208       if Exp = 0 then
 209          Fore := To'Length - 1 - Aft;
 210       else
 211          Fore := To'Length - 2 - Aft - Exp;
 212       end if;
 213
 214       if Fore < 1 then
 215          raise Layout_Error;
 216       end if;
 217
 218       Set_Image_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 219
 220       if Ptr > To'Length then
 221          raise Layout_Error;
 222       else
 223          To := Buf (1 .. Ptr);
 224       end if;
 225    end Puts_Dec;
 226
 227    --------------
 228    -- Puts_Dec --
 229    --------------
 230
 231    procedure Puts_LLD
 232      (To    : out String;
 233       Item  : in Long_Long_Integer;
 234       Aft   : in Field;
 235       Exp   : in Field;
 236       Scale : Integer)
 237    is
 238       Buf  : String (1 .. Field'Last);
 239       Fore : Integer;
 240       Ptr  : Natural := 0;
 241
 242    begin
 243       if Exp = 0 then
 244          Fore := To'Length - 1 - Aft;
 245       else
 246          Fore := To'Length - 2 - Aft - Exp;
 247       end if;
 248
 249       if Fore < 1 then
 250          raise Layout_Error;
 251       end if;
 252
 253       Set_Image_Long_Long_Decimal (Item, Buf, Ptr, Scale, Fore, Aft, Exp);
 254
 255       if Ptr > To'Length then
 256          raise Layout_Error;
 257       else
 258          To := Buf (1 .. Ptr);
 259       end if;
 260    end Puts_LLD;
 261
 262 end Ada.Text_IO.Decimal_Aux;