gcc/ada/a-tiinau.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --              A D A . T E X T _ I O . I N T E G E R  _ A U X              --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.9 $
  10 --                                                                          --
  11 --          Copyright (C) 1992-1999 Free Software Foundation, Inc.          --
  12 --                                                                          --
  13 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- As a special exception,  if other files  instantiate  generics from this --
  25 -- unit, or you link  this unit with other files  to produce an executable, --
  26 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  27 -- covered  by the  GNU  General  Public  License.  This exception does not --
  28 -- however invalidate  any other reasons why  the executable file  might be --
  29 -- covered by the  GNU Public License.                                      --
  30 --                                                                          --
  31 -- GNAT was originally developed  by the GNAT team at  New York University. --
  32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 with Ada.Text_IO.Generic_Aux; use Ada.Text_IO.Generic_Aux;
  37
  38 with System.Img_BIU;   use System.Img_BIU;
  39 with System.Img_Int;   use System.Img_Int;
  40 with System.Img_LLB;   use System.Img_LLB;
  41 with System.Img_LLI;   use System.Img_LLI;
  42 with System.Img_LLW;   use System.Img_LLW;
  43 with System.Img_WIU;   use System.Img_WIU;
  44 with System.Val_Int;   use System.Val_Int;
  45 with System.Val_LLI;   use System.Val_LLI;
  46
  47 package body Ada.Text_IO.Integer_Aux is
  48
  49    -----------------------
  50    -- Local Subprograms --
  51    -----------------------
  52
  53    procedure Load_Integer
  54      (File : in File_Type;
  55       Buf  : out String;
  56       Ptr  : in out Natural);
  57    --  This is an auxiliary routine that is used to load an possibly signed
  58    --  integer literal value from the input file into Buf, starting at Ptr + 1.
  59    --  On return, Ptr is set to the last character stored.
  60
  61    -------------
  62    -- Get_Int --
  63    -------------
  64
  65    procedure Get_Int
  66      (File  : in File_Type;
  67       Item  : out Integer;
  68       Width : in Field)
  69    is
  70       Buf  : String (1 .. Field'Last);
  71       Ptr  : aliased Integer := 1;
  72       Stop : Integer := 0;
  73
  74    begin
  75       if Width /= 0 then
  76          Load_Width (File, Width, Buf, Stop);
  77          String_Skip (Buf, Ptr);
  78       else
  79          Load_Integer (File, Buf, Stop);
  80       end if;
  81
  82       Item := Scan_Integer (Buf, Ptr'Access, Stop);
  83       Check_End_Of_Field (File, Buf, Stop, Ptr, Width);
  84    end Get_Int;
  85
  86    -------------
  87    -- Get_LLI --
  88    -------------
  89
  90    procedure Get_LLI
  91      (File  : in File_Type;
  92       Item  : out Long_Long_Integer;
  93       Width : in Field)
  94    is
  95       Buf  : String (1 .. Field'Last);
  96       Ptr  : aliased Integer := 1;
  97       Stop : Integer := 0;
  98
  99    begin
 100       if Width /= 0 then
 101          Load_Width (File, Width, Buf, Stop);
 102          String_Skip (Buf, Ptr);
 103       else
 104          Load_Integer (File, Buf, Stop);
 105       end if;
 106
 107       Item := Scan_Long_Long_Integer (Buf, Ptr'Access, Stop);
 108       Check_End_Of_Field (File, Buf, Stop, Ptr, Width);
 109    end Get_LLI;
 110
 111    --------------
 112    -- Gets_Int --
 113    --------------
 114
 115    procedure Gets_Int
 116      (From : in String;
 117       Item : out Integer;
 118       Last : out Positive)
 119    is
 120       Pos : aliased Integer;
 121
 122    begin
 123       String_Skip (From, Pos);
 124       Item := Scan_Integer (From, Pos'Access, From'Last);
 125       Last := Pos - 1;
 126
 127    exception
 128       when Constraint_Error =>
 129          Last := Pos - 1;
 130          raise Data_Error;
 131    end Gets_Int;
 132
 133    --------------
 134    -- Gets_LLI --
 135    --------------
 136
 137    procedure Gets_LLI
 138      (From : in String;
 139       Item : out Long_Long_Integer;
 140       Last : out Positive)
 141    is
 142       Pos : aliased Integer;
 143
 144    begin
 145       String_Skip (From, Pos);
 146       Item := Scan_Long_Long_Integer (From, Pos'Access, From'Last);
 147       Last := Pos - 1;
 148
 149    exception
 150       when Constraint_Error =>
 151          Last := Pos - 1;
 152          raise Data_Error;
 153    end Gets_LLI;
 154
 155    ------------------
 156    -- Load_Integer --
 157    ------------------
 158
 159    procedure Load_Integer
 160      (File : in File_Type;
 161       Buf  : out String;
 162       Ptr  : in out Natural)
 163    is
 164       Hash_Loc : Natural;
 165       Loaded   : Boolean;
 166
 167    begin
 168       Load_Skip (File);
 169       Load (File, Buf, Ptr, '+', '-');
 170
 171       Load_Digits (File, Buf, Ptr, Loaded);
 172
 173       if Loaded then
 174          Load (File, Buf, Ptr, '#', ':', Loaded);
 175
 176          if Loaded then
 177             Hash_Loc := Ptr;
 178             Load_Extended_Digits (File, Buf, Ptr);
 179             Load (File, Buf, Ptr, Buf (Hash_Loc));
 180          end if;
 181
 182          Load (File, Buf, Ptr, 'E', 'e', Loaded);
 183
 184          if Loaded then
 185
 186             --  Note: it is strange to allow a minus sign, since the syntax
 187             --  does not, but that is what ACVC test CE3704F, case (6) wants.
 188
 189             Load (File, Buf, Ptr, '+', '-');
 190             Load_Digits (File, Buf, Ptr);
 191          end if;
 192       end if;
 193    end Load_Integer;
 194
 195    -------------
 196    -- Put_Int --
 197    -------------
 198
 199    procedure Put_Int
 200      (File  : in File_Type;
 201       Item  : in Integer;
 202       Width : in Field;
 203       Base  : in Number_Base)
 204    is
 205       Buf : String (1 .. Integer'Max (Field'Last, Width));
 206       Ptr : Natural := 0;
 207
 208    begin
 209       if Base = 10 and then Width = 0 then
 210          Set_Image_Integer (Item, Buf, Ptr);
 211       elsif Base = 10 then
 212          Set_Image_Width_Integer (Item, Width, Buf, Ptr);
 213       else
 214          Set_Image_Based_Integer (Item, Base, Width, Buf, Ptr);
 215       end if;
 216
 217       Put_Item (File, Buf (1 .. Ptr));
 218    end Put_Int;
 219
 220    -------------
 221    -- Put_LLI --
 222    -------------
 223
 224    procedure Put_LLI
 225      (File  : in File_Type;
 226       Item  : in Long_Long_Integer;
 227       Width : in Field;
 228       Base  : in Number_Base)
 229    is
 230       Buf : String (1 .. Integer'Max (Field'Last, Width));
 231       Ptr : Natural := 0;
 232
 233    begin
 234       if Base = 10 and then Width = 0 then
 235          Set_Image_Long_Long_Integer (Item, Buf, Ptr);
 236       elsif Base = 10 then
 237          Set_Image_Width_Long_Long_Integer (Item, Width, Buf, Ptr);
 238       else
 239          Set_Image_Based_Long_Long_Integer (Item, Base, Width, Buf, Ptr);
 240       end if;
 241
 242       Put_Item (File, Buf (1 .. Ptr));
 243    end Put_LLI;
 244
 245    --------------
 246    -- Puts_Int --
 247    --------------
 248
 249    procedure Puts_Int
 250      (To   : out String;
 251       Item : in Integer;
 252       Base : in Number_Base)
 253    is
 254       Buf : String (1 .. Integer'Max (Field'Last, To'Length));
 255       Ptr : Natural := 0;
 256
 257    begin
 258       if Base = 10 then
 259          Set_Image_Width_Integer (Item, To'Length, Buf, Ptr);
 260       else
 261          Set_Image_Based_Integer (Item, Base, To'Length, Buf, Ptr);
 262       end if;
 263
 264       if Ptr > To'Length then
 265          raise Layout_Error;
 266       else
 267          To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
 268       end if;
 269    end Puts_Int;
 270
 271    --------------
 272    -- Puts_LLI --
 273    --------------
 274
 275    procedure Puts_LLI
 276      (To   : out String;
 277       Item : in Long_Long_Integer;
 278       Base : in Number_Base)
 279    is
 280       Buf : String (1 .. Integer'Max (Field'Last, To'Length));
 281       Ptr : Natural := 0;
 282
 283    begin
 284       if Base = 10 then
 285          Set_Image_Width_Long_Long_Integer (Item, To'Length, Buf, Ptr);
 286       else
 287          Set_Image_Based_Long_Long_Integer (Item, Base, To'Length, Buf, Ptr);
 288       end if;
 289
 290       if Ptr > To'Length then
 291          raise Layout_Error;
 292       else
 293          To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
 294       end if;
 295    end Puts_LLI;
 296
 297 end Ada.Text_IO.Integer_Aux;