gcc/ada/a-wtinau.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --         A D A . W I D E _ T E X T _ I O . I N T E G E R  _ A U X         --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2005 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.Wide_Text_IO.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux;
  35
  36 with System.Img_BIU;   use System.Img_BIU;
  37 with System.Img_Int;   use System.Img_Int;
  38 with System.Img_LLB;   use System.Img_LLB;
  39 with System.Img_LLI;   use System.Img_LLI;
  40 with System.Img_LLW;   use System.Img_LLW;
  41 with System.Img_WIU;   use System.Img_WIU;
  42 with System.Val_Int;   use System.Val_Int;
  43 with System.Val_LLI;   use System.Val_LLI;
  44
  45 package body Ada.Wide_Text_IO.Integer_Aux is
  46
  47    -----------------------
  48    -- Local Subprograms --
  49    -----------------------
  50
  51    procedure Load_Integer
  52      (File : in File_Type;
  53       Buf  : out String;
  54       Ptr  : in out Natural);
  55    --  This is an auxiliary routine that is used to load an possibly signed
  56    --  integer literal value from the input file into Buf, starting at Ptr + 1.
  57    --  On return, Ptr is set to the last character stored.
  58
  59    -------------
  60    -- Get_Int --
  61    -------------
  62
  63    procedure Get_Int
  64      (File  : in File_Type;
  65       Item  : out Integer;
  66       Width : in Field)
  67    is
  68       Buf  : String (1 .. Field'Last);
  69       Ptr  : aliased Integer := 1;
  70       Stop : Integer := 0;
  71
  72    begin
  73       if Width /= 0 then
  74          Load_Width (File, Width, Buf, Stop);
  75          String_Skip (Buf, Ptr);
  76       else
  77          Load_Integer (File, Buf, Stop);
  78       end if;
  79
  80       Item := Scan_Integer (Buf, Ptr'Access, Stop);
  81       Check_End_Of_Field (Buf, Stop, Ptr, Width);
  82    end Get_Int;
  83
  84    -------------
  85    -- Get_LLI --
  86    -------------
  87
  88    procedure Get_LLI
  89      (File  : in File_Type;
  90       Item  : out Long_Long_Integer;
  91       Width : in Field)
  92    is
  93       Buf  : String (1 .. Field'Last);
  94       Ptr  : aliased Integer := 1;
  95       Stop : Integer := 0;
  96
  97    begin
  98       if Width /= 0 then
  99          Load_Width (File, Width, Buf, Stop);
 100          String_Skip (Buf, Ptr);
 101       else
 102          Load_Integer (File, Buf, Stop);
 103       end if;
 104
 105       Item := Scan_Long_Long_Integer (Buf, Ptr'Access, Stop);
 106       Check_End_Of_Field (Buf, Stop, Ptr, Width);
 107    end Get_LLI;
 108
 109    --------------
 110    -- Gets_Int --
 111    --------------
 112
 113    procedure Gets_Int
 114      (From : in String;
 115       Item : out Integer;
 116       Last : out Positive)
 117    is
 118       Pos : aliased Integer;
 119
 120    begin
 121       String_Skip (From, Pos);
 122       Item := Scan_Integer (From, Pos'Access, From'Last);
 123       Last := Pos - 1;
 124
 125    exception
 126       when Constraint_Error =>
 127          raise Data_Error;
 128    end Gets_Int;
 129
 130    --------------
 131    -- Gets_LLI --
 132    --------------
 133
 134    procedure Gets_LLI
 135      (From : in String;
 136       Item : out Long_Long_Integer;
 137       Last : out Positive)
 138    is
 139       Pos : aliased Integer;
 140
 141    begin
 142       String_Skip (From, Pos);
 143       Item := Scan_Long_Long_Integer (From, Pos'Access, From'Last);
 144       Last := Pos - 1;
 145
 146    exception
 147       when Constraint_Error =>
 148          raise Data_Error;
 149    end Gets_LLI;
 150
 151    ------------------
 152    -- Load_Integer --
 153    ------------------
 154
 155    procedure Load_Integer
 156      (File : in File_Type;
 157       Buf  : out String;
 158       Ptr  : in out Natural)
 159    is
 160       Hash_Loc : Natural;
 161       Loaded   : Boolean;
 162
 163    begin
 164       Load_Skip (File);
 165       Load (File, Buf, Ptr, '+', '-');
 166
 167       Load_Digits (File, Buf, Ptr, Loaded);
 168
 169       if Loaded then
 170          Load (File, Buf, Ptr, '#', ':', Loaded);
 171
 172          if Loaded then
 173             Hash_Loc := Ptr;
 174             Load_Extended_Digits (File, Buf, Ptr);
 175             Load (File, Buf, Ptr, Buf (Hash_Loc));
 176          end if;
 177
 178          Load (File, Buf, Ptr, 'E', 'e', Loaded);
 179
 180          if Loaded then
 181
 182             --  Note: it is strange to allow a minus sign, since the syntax
 183             --  does not, but that is what ACVC test CE3704F, case (6) wants.
 184
 185             Load (File, Buf, Ptr, '+', '-');
 186             Load_Digits (File, Buf, Ptr);
 187          end if;
 188       end if;
 189    end Load_Integer;
 190
 191    -------------
 192    -- Put_Int --
 193    -------------
 194
 195    procedure Put_Int
 196      (File  : in File_Type;
 197       Item  : in Integer;
 198       Width : in Field;
 199       Base  : in Number_Base)
 200    is
 201       Buf : String (1 .. Field'Last);
 202       Ptr : Natural := 0;
 203
 204    begin
 205       if Base = 10 and then Width = 0 then
 206          Set_Image_Integer (Item, Buf, Ptr);
 207       elsif Base = 10 then
 208          Set_Image_Width_Integer (Item, Width, Buf, Ptr);
 209       else
 210          Set_Image_Based_Integer (Item, Base, Width, Buf, Ptr);
 211       end if;
 212
 213       Put_Item (File, Buf (1 .. Ptr));
 214    end Put_Int;
 215
 216    -------------
 217    -- Put_LLI --
 218    -------------
 219
 220    procedure Put_LLI
 221      (File  : in File_Type;
 222       Item  : in Long_Long_Integer;
 223       Width : in Field;
 224       Base  : in Number_Base)
 225    is
 226       Buf : String (1 .. Field'Last);
 227       Ptr : Natural := 0;
 228
 229    begin
 230       if Base = 10 and then Width = 0 then
 231          Set_Image_Long_Long_Integer (Item, Buf, Ptr);
 232       elsif Base = 10 then
 233          Set_Image_Width_Long_Long_Integer (Item, Width, Buf, Ptr);
 234       else
 235          Set_Image_Based_Long_Long_Integer (Item, Base, Width, Buf, Ptr);
 236       end if;
 237
 238       Put_Item (File, Buf (1 .. Ptr));
 239    end Put_LLI;
 240
 241    --------------
 242    -- Puts_Int --
 243    --------------
 244
 245    procedure Puts_Int
 246      (To   : out String;
 247       Item : in Integer;
 248       Base : in Number_Base)
 249    is
 250       Buf : String (1 .. Field'Last);
 251       Ptr : Natural := 0;
 252
 253    begin
 254       if Base = 10 then
 255          Set_Image_Width_Integer (Item, To'Length, Buf, Ptr);
 256       else
 257          Set_Image_Based_Integer (Item, Base, To'Length, Buf, Ptr);
 258       end if;
 259
 260       if Ptr > To'Length then
 261          raise Layout_Error;
 262       else
 263          To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
 264       end if;
 265    end Puts_Int;
 266
 267    --------------
 268    -- Puts_LLI --
 269    --------------
 270
 271    procedure Puts_LLI
 272      (To   : out String;
 273       Item : in Long_Long_Integer;
 274       Base : in Number_Base)
 275    is
 276       Buf : String (1 .. Field'Last);
 277       Ptr : Natural := 0;
 278
 279    begin
 280       if Base = 10 then
 281          Set_Image_Width_Long_Long_Integer (Item, To'Length, Buf, Ptr);
 282       else
 283          Set_Image_Based_Long_Long_Integer (Item, Base, To'Length, Buf, Ptr);
 284       end if;
 285
 286       if Ptr > To'Length then
 287          raise Layout_Error;
 288       else
 289          To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
 290       end if;
 291    end Puts_LLI;
 292
 293 end Ada.Wide_Text_IO.Integer_Aux;