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) 1992-2009, 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 3,  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.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 with Ada.Wide_Text_IO.Generic_Aux; use Ada.Wide_Text_IO.Generic_Aux;
  33
  34 with System.Img_BIU; use System.Img_BIU;
  35 with System.Img_Int; use System.Img_Int;
  36 with System.Img_LLB; use System.Img_LLB;
  37 with System.Img_LLI; use System.Img_LLI;
  38 with System.Img_LLW; use System.Img_LLW;
  39 with System.Img_WIU; use System.Img_WIU;
  40 with System.Val_Int; use System.Val_Int;
  41 with System.Val_LLI; use System.Val_LLI;
  42
  43 package body Ada.Wide_Text_IO.Integer_Aux is
  44
  45    -----------------------
  46    -- Local Subprograms --
  47    -----------------------
  48
  49    procedure Load_Integer
  50      (File : File_Type;
  51       Buf  : out String;
  52       Ptr  : in out Natural);
  53    --  This is an auxiliary routine that is used to load an possibly signed
  54    --  integer literal value from the input file into Buf, starting at Ptr + 1.
  55    --  On return, Ptr is set to the last character stored.
  56
  57    -------------
  58    -- Get_Int --
  59    -------------
  60
  61    procedure Get_Int
  62      (File  : File_Type;
  63       Item  : out Integer;
  64       Width : Field)
  65    is
  66       Buf  : String (1 .. Field'Last);
  67       Ptr  : aliased Integer := 1;
  68       Stop : Integer := 0;
  69
  70    begin
  71       if Width /= 0 then
  72          Load_Width (File, Width, Buf, Stop);
  73          String_Skip (Buf, Ptr);
  74       else
  75          Load_Integer (File, Buf, Stop);
  76       end if;
  77
  78       Item := Scan_Integer (Buf, Ptr'Access, Stop);
  79       Check_End_Of_Field (Buf, Stop, Ptr, Width);
  80    end Get_Int;
  81
  82    -------------
  83    -- Get_LLI --
  84    -------------
  85
  86    procedure Get_LLI
  87      (File  : File_Type;
  88       Item  : out Long_Long_Integer;
  89       Width : Field)
  90    is
  91       Buf  : String (1 .. Field'Last);
  92       Ptr  : aliased Integer := 1;
  93       Stop : Integer := 0;
  94
  95    begin
  96       if Width /= 0 then
  97          Load_Width (File, Width, Buf, Stop);
  98          String_Skip (Buf, Ptr);
  99       else
 100          Load_Integer (File, Buf, Stop);
 101       end if;
 102
 103       Item := Scan_Long_Long_Integer (Buf, Ptr'Access, Stop);
 104       Check_End_Of_Field (Buf, Stop, Ptr, Width);
 105    end Get_LLI;
 106
 107    --------------
 108    -- Gets_Int --
 109    --------------
 110
 111    procedure Gets_Int
 112      (From : String;
 113       Item : out Integer;
 114       Last : out Positive)
 115    is
 116       Pos : aliased Integer;
 117
 118    begin
 119       String_Skip (From, Pos);
 120       Item := Scan_Integer (From, Pos'Access, From'Last);
 121       Last := Pos - 1;
 122
 123    exception
 124       when Constraint_Error =>
 125          raise Data_Error;
 126    end Gets_Int;
 127
 128    --------------
 129    -- Gets_LLI --
 130    --------------
 131
 132    procedure Gets_LLI
 133      (From : String;
 134       Item : out Long_Long_Integer;
 135       Last : out Positive)
 136    is
 137       Pos : aliased Integer;
 138
 139    begin
 140       String_Skip (From, Pos);
 141       Item := Scan_Long_Long_Integer (From, Pos'Access, From'Last);
 142       Last := Pos - 1;
 143
 144    exception
 145       when Constraint_Error =>
 146          raise Data_Error;
 147    end Gets_LLI;
 148
 149    ------------------
 150    -- Load_Integer --
 151    ------------------
 152
 153    procedure Load_Integer
 154      (File : File_Type;
 155       Buf  : out String;
 156       Ptr  : in out Natural)
 157    is
 158       Hash_Loc : Natural;
 159       Loaded   : Boolean;
 160
 161    begin
 162       Load_Skip (File);
 163       Load (File, Buf, Ptr, '+', '-');
 164
 165       Load_Digits (File, Buf, Ptr, Loaded);
 166
 167       if Loaded then
 168          Load (File, Buf, Ptr, '#', ':', Loaded);
 169
 170          if Loaded then
 171             Hash_Loc := Ptr;
 172             Load_Extended_Digits (File, Buf, Ptr);
 173             Load (File, Buf, Ptr, Buf (Hash_Loc));
 174          end if;
 175
 176          Load (File, Buf, Ptr, 'E', 'e', Loaded);
 177
 178          if Loaded then
 179
 180             --  Note: it is strange to allow a minus sign, since the syntax
 181             --  does not, but that is what ACVC test CE3704F, case (6) wants.
 182
 183             Load (File, Buf, Ptr, '+', '-');
 184             Load_Digits (File, Buf, Ptr);
 185          end if;
 186       end if;
 187    end Load_Integer;
 188
 189    -------------
 190    -- Put_Int --
 191    -------------
 192
 193    procedure Put_Int
 194      (File  : File_Type;
 195       Item  : Integer;
 196       Width : Field;
 197       Base  : Number_Base)
 198    is
 199       Buf : String (1 .. Field'Last);
 200       Ptr : Natural := 0;
 201
 202    begin
 203       if Base = 10 and then Width = 0 then
 204          Set_Image_Integer (Item, Buf, Ptr);
 205       elsif Base = 10 then
 206          Set_Image_Width_Integer (Item, Width, Buf, Ptr);
 207       else
 208          Set_Image_Based_Integer (Item, Base, Width, Buf, Ptr);
 209       end if;
 210
 211       Put_Item (File, Buf (1 .. Ptr));
 212    end Put_Int;
 213
 214    -------------
 215    -- Put_LLI --
 216    -------------
 217
 218    procedure Put_LLI
 219      (File  : File_Type;
 220       Item  : Long_Long_Integer;
 221       Width : Field;
 222       Base  : Number_Base)
 223    is
 224       Buf : String (1 .. Field'Last);
 225       Ptr : Natural := 0;
 226
 227    begin
 228       if Base = 10 and then Width = 0 then
 229          Set_Image_Long_Long_Integer (Item, Buf, Ptr);
 230       elsif Base = 10 then
 231          Set_Image_Width_Long_Long_Integer (Item, Width, Buf, Ptr);
 232       else
 233          Set_Image_Based_Long_Long_Integer (Item, Base, Width, Buf, Ptr);
 234       end if;
 235
 236       Put_Item (File, Buf (1 .. Ptr));
 237    end Put_LLI;
 238
 239    --------------
 240    -- Puts_Int --
 241    --------------
 242
 243    procedure Puts_Int
 244      (To   : out String;
 245       Item : Integer;
 246       Base : Number_Base)
 247    is
 248       Buf : String (1 .. Field'Last);
 249       Ptr : Natural := 0;
 250
 251    begin
 252       if Base = 10 then
 253          Set_Image_Width_Integer (Item, To'Length, Buf, Ptr);
 254       else
 255          Set_Image_Based_Integer (Item, Base, To'Length, Buf, Ptr);
 256       end if;
 257
 258       if Ptr > To'Length then
 259          raise Layout_Error;
 260       else
 261          To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
 262       end if;
 263    end Puts_Int;
 264
 265    --------------
 266    -- Puts_LLI --
 267    --------------
 268
 269    procedure Puts_LLI
 270      (To   : out String;
 271       Item : Long_Long_Integer;
 272       Base : Number_Base)
 273    is
 274       Buf : String (1 .. Field'Last);
 275       Ptr : Natural := 0;
 276
 277    begin
 278       if Base = 10 then
 279          Set_Image_Width_Long_Long_Integer (Item, To'Length, Buf, Ptr);
 280       else
 281          Set_Image_Based_Long_Long_Integer (Item, Base, To'Length, Buf, Ptr);
 282       end if;
 283
 284       if Ptr > To'Length then
 285          raise Layout_Error;
 286       else
 287          To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
 288       end if;
 289    end Puts_LLI;
 290
 291 end Ada.Wide_Text_IO.Integer_Aux;