gcc/ada/a-wtmoau.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --         A D A . W I D E _ T E X T _ I O . M O D U L A 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_Uns;   use System.Img_Uns;
  38 with System.Img_LLB;   use System.Img_LLB;
  39 with System.Img_LLU;   use System.Img_LLU;
  40 with System.Img_LLW;   use System.Img_LLW;
  41 with System.Img_WIU;   use System.Img_WIU;
  42 with System.Val_Uns;   use System.Val_Uns;
  43 with System.Val_LLU;   use System.Val_LLU;
  44
  45 package body Ada.Wide_Text_IO.Modular_Aux is
  46
  47    use System.Unsigned_Types;
  48
  49    -----------------------
  50    -- Local Subprograms --
  51    -----------------------
  52
  53    procedure Load_Modular
  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    --  modular literal value from the input file into Buf, starting at Ptr + 1.
  59    --  Ptr is left set to the last character stored.
  60
  61    -------------
  62    -- Get_LLU --
  63    -------------
  64
  65    procedure Get_LLU
  66      (File  : in File_Type;
  67       Item  : out Long_Long_Unsigned;
  68       Width : in Field)
  69    is
  70       Buf  : String (1 .. Field'Last);
  71       Stop : Integer := 0;
  72       Ptr  : aliased Integer := 1;
  73
  74    begin
  75       if Width /= 0 then
  76          Load_Width (File, Width, Buf, Stop);
  77          String_Skip (Buf, Ptr);
  78       else
  79          Load_Modular (File, Buf, Stop);
  80       end if;
  81
  82       Item := Scan_Long_Long_Unsigned (Buf, Ptr'Access, Stop);
  83       Check_End_Of_Field (Buf, Stop, Ptr, Width);
  84    end Get_LLU;
  85
  86    -------------
  87    -- Get_Uns --
  88    -------------
  89
  90    procedure Get_Uns
  91      (File  : in File_Type;
  92       Item  : out Unsigned;
  93       Width : in Field)
  94    is
  95       Buf  : String (1 .. Field'Last);
  96       Stop : Integer := 0;
  97       Ptr  : aliased Integer := 1;
  98
  99    begin
 100       if Width /= 0 then
 101          Load_Width (File, Width, Buf, Stop);
 102          String_Skip (Buf, Ptr);
 103       else
 104          Load_Modular (File, Buf, Stop);
 105       end if;
 106
 107       Item := Scan_Unsigned (Buf, Ptr'Access, Stop);
 108       Check_End_Of_Field (Buf, Stop, Ptr, Width);
 109    end Get_Uns;
 110
 111    --------------
 112    -- Gets_LLU --
 113    --------------
 114
 115    procedure Gets_LLU
 116      (From : in String;
 117       Item : out Long_Long_Unsigned;
 118       Last : out Positive)
 119    is
 120       Pos : aliased Integer;
 121
 122    begin
 123       String_Skip (From, Pos);
 124       Item := Scan_Long_Long_Unsigned (From, Pos'Access, From'Last);
 125       Last := Pos - 1;
 126
 127    exception
 128       when Constraint_Error =>
 129          raise Data_Error;
 130    end Gets_LLU;
 131
 132    --------------
 133    -- Gets_Uns --
 134    --------------
 135
 136    procedure Gets_Uns
 137      (From : in String;
 138       Item : out Unsigned;
 139       Last : out Positive)
 140    is
 141       Pos : aliased Integer;
 142
 143    begin
 144       String_Skip (From, Pos);
 145       Item := Scan_Unsigned (From, Pos'Access, From'Last);
 146       Last := Pos - 1;
 147
 148    exception
 149       when Constraint_Error =>
 150          raise Data_Error;
 151    end Gets_Uns;
 152
 153    ------------------
 154    -- Load_Modular --
 155    ------------------
 156
 157    procedure Load_Modular
 158      (File : in File_Type;
 159       Buf  : out String;
 160       Ptr  : in out Natural)
 161    is
 162       Hash_Loc : Natural;
 163       Loaded   : Boolean;
 164
 165    begin
 166       Load_Skip (File);
 167
 168       --  Note: it is a bit strange to allow a minus sign here, but it seems
 169       --  consistent with the general behavior expected by the ACVC tests
 170       --  which is to scan past junk and then signal data error, see ACVC
 171       --  test CE3704F, case (6), which is for signed integer exponents,
 172       --  which seems a similar case.
 173
 174       Load (File, Buf, Ptr, '+', '-');
 175       Load_Digits (File, Buf, Ptr, Loaded);
 176
 177       if Loaded then
 178          Load (File, Buf, Ptr, '#', ':', Loaded);
 179
 180          if Loaded then
 181             Hash_Loc := Ptr;
 182             Load_Extended_Digits (File, Buf, Ptr);
 183             Load (File, Buf, Ptr, Buf (Hash_Loc));
 184          end if;
 185
 186          Load (File, Buf, Ptr, 'E', 'e', Loaded);
 187
 188          if Loaded then
 189
 190             --  Note: it is strange to allow a minus sign, since the syntax
 191             --  does not, but that is what ACVC test CE3704F, case (6) wants
 192             --  for the signed case, and there seems no good reason to treat
 193             --  exponents differently for the signed and unsigned cases.
 194
 195             Load (File, Buf, Ptr, '+', '-');
 196             Load_Digits (File, Buf, Ptr);
 197          end if;
 198       end if;
 199    end Load_Modular;
 200
 201    -------------
 202    -- Put_LLU --
 203    -------------
 204
 205    procedure Put_LLU
 206      (File  : in File_Type;
 207       Item  : in Long_Long_Unsigned;
 208       Width : in Field;
 209       Base  : in Number_Base)
 210    is
 211       Buf : String (1 .. Field'Last);
 212       Ptr : Natural := 0;
 213
 214    begin
 215       if Base = 10 and then Width = 0 then
 216          Set_Image_Long_Long_Unsigned (Item, Buf, Ptr);
 217       elsif Base = 10 then
 218          Set_Image_Width_Long_Long_Unsigned (Item, Width, Buf, Ptr);
 219       else
 220          Set_Image_Based_Long_Long_Unsigned (Item, Base, Width, Buf, Ptr);
 221       end if;
 222
 223       Put_Item (File, Buf (1 .. Ptr));
 224    end Put_LLU;
 225
 226    -------------
 227    -- Put_Uns --
 228    -------------
 229
 230    procedure Put_Uns
 231      (File  : in File_Type;
 232       Item  : in Unsigned;
 233       Width : in Field;
 234       Base  : in Number_Base)
 235    is
 236       Buf : String (1 .. Field'Last);
 237       Ptr : Natural := 0;
 238
 239    begin
 240       if Base = 10 and then Width = 0 then
 241          Set_Image_Unsigned (Item, Buf, Ptr);
 242       elsif Base = 10 then
 243          Set_Image_Width_Unsigned (Item, Width, Buf, Ptr);
 244       else
 245          Set_Image_Based_Unsigned (Item, Base, Width, Buf, Ptr);
 246       end if;
 247
 248       Put_Item (File, Buf (1 .. Ptr));
 249    end Put_Uns;
 250
 251    --------------
 252    -- Puts_LLU --
 253    --------------
 254
 255    procedure Puts_LLU
 256      (To   : out String;
 257       Item : in Long_Long_Unsigned;
 258       Base : in Number_Base)
 259    is
 260       Buf : String (1 .. Field'Last);
 261       Ptr : Natural := 0;
 262
 263    begin
 264       if Base = 10 then
 265          Set_Image_Width_Long_Long_Unsigned (Item, To'Length, Buf, Ptr);
 266       else
 267          Set_Image_Based_Long_Long_Unsigned (Item, Base, To'Length, Buf, Ptr);
 268       end if;
 269
 270       if Ptr > To'Length then
 271          raise Layout_Error;
 272       else
 273          To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
 274       end if;
 275    end Puts_LLU;
 276
 277    --------------
 278    -- Puts_Uns --
 279    --------------
 280
 281    procedure Puts_Uns
 282      (To   : out String;
 283       Item : in Unsigned;
 284       Base : in Number_Base)
 285    is
 286       Buf : String (1 .. Field'Last);
 287       Ptr : Natural := 0;
 288
 289    begin
 290       if Base = 10 then
 291          Set_Image_Width_Unsigned (Item, To'Length, Buf, Ptr);
 292       else
 293          Set_Image_Based_Unsigned (Item, Base, To'Length, Buf, Ptr);
 294       end if;
 295
 296       if Ptr > To'Length then
 297          raise Layout_Error;
 298       else
 299          To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
 300       end if;
 301    end Puts_Uns;
 302
 303 end Ada.Wide_Text_IO.Modular_Aux;