gcc/ada/a-wtmoau.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME 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) 1992-2001 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.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          Last := Pos - 1;
 130          raise Data_Error;
 131
 132    end Gets_LLU;
 133
 134    --------------
 135    -- Gets_Uns --
 136    --------------
 137
 138    procedure Gets_Uns
 139      (From : in String;
 140       Item : out Unsigned;
 141       Last : out Positive)
 142    is
 143       Pos : aliased Integer;
 144
 145    begin
 146       String_Skip (From, Pos);
 147       Item := Scan_Unsigned (From, Pos'Access, From'Last);
 148       Last := Pos - 1;
 149
 150    exception
 151       when Constraint_Error =>
 152          Last := Pos - 1;
 153          raise Data_Error;
 154
 155    end Gets_Uns;
 156
 157    ------------------
 158    -- Load_Modular --
 159    ------------------
 160
 161    procedure Load_Modular
 162      (File : in File_Type;
 163       Buf  : out String;
 164       Ptr  : in out Natural)
 165    is
 166       Hash_Loc : Natural;
 167       Loaded   : Boolean;
 168
 169    begin
 170       Load_Skip (File);
 171
 172       --  Note: it is a bit strange to allow a minus sign here, but it seems
 173       --  consistent with the general behavior expected by the ACVC tests
 174       --  which is to scan past junk and then signal data error, see ACVC
 175       --  test CE3704F, case (6), which is for signed integer exponents,
 176       --  which seems a similar case.
 177
 178       Load (File, Buf, Ptr, '+', '-');
 179       Load_Digits (File, Buf, Ptr, Loaded);
 180
 181       if Loaded then
 182          Load (File, Buf, Ptr, '#', ':', Loaded);
 183
 184          if Loaded then
 185             Hash_Loc := Ptr;
 186             Load_Extended_Digits (File, Buf, Ptr);
 187             Load (File, Buf, Ptr, Buf (Hash_Loc));
 188          end if;
 189
 190          Load (File, Buf, Ptr, 'E', 'e', Loaded);
 191
 192          if Loaded then
 193
 194             --  Note: it is strange to allow a minus sign, since the syntax
 195             --  does not, but that is what ACVC test CE3704F, case (6) wants
 196             --  for the signed case, and there seems no good reason to treat
 197             --  exponents differently for the signed and unsigned cases.
 198
 199             Load (File, Buf, Ptr, '+', '-');
 200             Load_Digits (File, Buf, Ptr);
 201          end if;
 202       end if;
 203    end Load_Modular;
 204
 205    -------------
 206    -- Put_LLU --
 207    -------------
 208
 209    procedure Put_LLU
 210      (File  : in File_Type;
 211       Item  : in Long_Long_Unsigned;
 212       Width : in Field;
 213       Base  : in Number_Base)
 214    is
 215       Buf : String (1 .. Field'Last);
 216       Ptr : Natural := 0;
 217
 218    begin
 219       if Base = 10 and then Width = 0 then
 220          Set_Image_Long_Long_Unsigned (Item, Buf, Ptr);
 221       elsif Base = 10 then
 222          Set_Image_Width_Long_Long_Unsigned (Item, Width, Buf, Ptr);
 223       else
 224          Set_Image_Based_Long_Long_Unsigned (Item, Base, Width, Buf, Ptr);
 225       end if;
 226
 227       Put_Item (File, Buf (1 .. Ptr));
 228    end Put_LLU;
 229
 230    -------------
 231    -- Put_Uns --
 232    -------------
 233
 234    procedure Put_Uns
 235      (File  : in File_Type;
 236       Item  : in Unsigned;
 237       Width : in Field;
 238       Base  : in Number_Base)
 239    is
 240       Buf : String (1 .. Field'Last);
 241       Ptr : Natural := 0;
 242
 243    begin
 244       if Base = 10 and then Width = 0 then
 245          Set_Image_Unsigned (Item, Buf, Ptr);
 246       elsif Base = 10 then
 247          Set_Image_Width_Unsigned (Item, Width, Buf, Ptr);
 248       else
 249          Set_Image_Based_Unsigned (Item, Base, Width, Buf, Ptr);
 250       end if;
 251
 252       Put_Item (File, Buf (1 .. Ptr));
 253    end Put_Uns;
 254
 255    --------------
 256    -- Puts_LLU --
 257    --------------
 258
 259    procedure Puts_LLU
 260      (To   : out String;
 261       Item : in Long_Long_Unsigned;
 262       Base : in Number_Base)
 263    is
 264       Buf : String (1 .. Field'Last);
 265       Ptr : Natural := 0;
 266
 267    begin
 268       if Base = 10 then
 269          Set_Image_Width_Long_Long_Unsigned (Item, To'Length, Buf, Ptr);
 270       else
 271          Set_Image_Based_Long_Long_Unsigned (Item, Base, To'Length, Buf, Ptr);
 272       end if;
 273
 274       if Ptr > To'Length then
 275          raise Layout_Error;
 276       else
 277          To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
 278       end if;
 279    end Puts_LLU;
 280
 281    --------------
 282    -- Puts_Uns --
 283    --------------
 284
 285    procedure Puts_Uns
 286      (To   : out String;
 287       Item : in Unsigned;
 288       Base : in Number_Base)
 289    is
 290       Buf : String (1 .. Field'Last);
 291       Ptr : Natural := 0;
 292
 293    begin
 294       if Base = 10 then
 295          Set_Image_Width_Unsigned (Item, To'Length, Buf, Ptr);
 296       else
 297          Set_Image_Based_Unsigned (Item, Base, To'Length, Buf, Ptr);
 298       end if;
 299
 300       if Ptr > To'Length then
 301          raise Layout_Error;
 302       else
 303          To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
 304       end if;
 305    end Puts_Uns;
 306
 307 end Ada.Wide_Text_IO.Modular_Aux;