gcc/ada/a-timoau.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME COMPONENTS                          --
   4 --                                                                          --
   5 --              A D A . T E X T _ I O . M O D U L A R  _ A U X              --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --                                                                          --
  10 --          Copyright (C) 1992-2001 Free Software Foundation, Inc.          --
  11 --                                                                          --
  12 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  15 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  20 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNAT was originally developed  by the GNAT team at  New York University. --
  31 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 with Ada.Text_IO.Generic_Aux; use Ada.Text_IO.Generic_Aux;
  36
  37 with System.Img_BIU; use System.Img_BIU;
  38 with System.Img_Uns; use System.Img_Uns;
  39 with System.Img_LLB; use System.Img_LLB;
  40 with System.Img_LLU; use System.Img_LLU;
  41 with System.Img_LLW; use System.Img_LLW;
  42 with System.Img_WIU; use System.Img_WIU;
  43 with System.Val_Uns; use System.Val_Uns;
  44 with System.Val_LLU; use System.Val_LLU;
  45
  46 package body Ada.Text_IO.Modular_Aux is
  47
  48    use System.Unsigned_Types;
  49
  50    -----------------------
  51    -- Local Subprograms --
  52    -----------------------
  53
  54    procedure Load_Modular
  55      (File : File_Type;
  56       Buf  : out String;
  57       Ptr  : in out Natural);
  58    --  This is an auxiliary routine that is used to load an possibly signed
  59    --  modular literal value from the input file into Buf, starting at Ptr + 1.
  60    --  Ptr is left set to the last character stored.
  61
  62    -------------
  63    -- Get_LLU --
  64    -------------
  65
  66    procedure Get_LLU
  67      (File  : File_Type;
  68       Item  : out Long_Long_Unsigned;
  69       Width : Field)
  70    is
  71       Buf  : String (1 .. Field'Last);
  72       Stop : Integer := 0;
  73       Ptr  : aliased Integer := 1;
  74
  75    begin
  76       if Width /= 0 then
  77          Load_Width (File, Width, Buf, Stop);
  78          String_Skip (Buf, Ptr);
  79       else
  80          Load_Modular (File, Buf, Stop);
  81       end if;
  82
  83       Item := Scan_Long_Long_Unsigned (Buf, Ptr'Access, Stop);
  84       Check_End_Of_Field (Buf, Stop, Ptr, Width);
  85    end Get_LLU;
  86
  87    -------------
  88    -- Get_Uns --
  89    -------------
  90
  91    procedure Get_Uns
  92      (File  : File_Type;
  93       Item  : out Unsigned;
  94       Width : Field)
  95    is
  96       Buf  : String (1 .. Field'Last);
  97       Stop : Integer := 0;
  98       Ptr  : aliased Integer := 1;
  99
 100    begin
 101       if Width /= 0 then
 102          Load_Width (File, Width, Buf, Stop);
 103          String_Skip (Buf, Ptr);
 104       else
 105          Load_Modular (File, Buf, Stop);
 106       end if;
 107
 108       Item := Scan_Unsigned (Buf, Ptr'Access, Stop);
 109       Check_End_Of_Field (Buf, Stop, Ptr, Width);
 110    end Get_Uns;
 111
 112    --------------
 113    -- Gets_LLU --
 114    --------------
 115
 116    procedure Gets_LLU
 117      (From : String;
 118       Item : out Long_Long_Unsigned;
 119       Last : out Positive)
 120    is
 121       Pos : aliased Integer;
 122
 123    begin
 124       String_Skip (From, Pos);
 125       Item := Scan_Long_Long_Unsigned (From, Pos'Access, From'Last);
 126       Last := Pos - 1;
 127
 128    exception
 129       when Constraint_Error =>
 130          Last := Pos - 1;
 131          raise Data_Error;
 132    end Gets_LLU;
 133
 134    --------------
 135    -- Gets_Uns --
 136    --------------
 137
 138    procedure Gets_Uns
 139      (From : 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    end Gets_Uns;
 155
 156    ------------------
 157    -- Load_Modular --
 158    ------------------
 159
 160    procedure Load_Modular
 161      (File : File_Type;
 162       Buf  : out String;
 163       Ptr  : in out Natural)
 164    is
 165       Hash_Loc : Natural;
 166       Loaded   : Boolean;
 167
 168    begin
 169       Load_Skip (File);
 170
 171       --  Note: it is a bit strange to allow a minus sign here, but it seems
 172       --  consistent with the general behavior expected by the ACVC tests
 173       --  which is to scan past junk and then signal data error, see ACVC
 174       --  test CE3704F, case (6), which is for signed integer exponents,
 175       --  which seems a similar case.
 176
 177       Load (File, Buf, Ptr, '+', '-');
 178       Load_Digits (File, Buf, Ptr, Loaded);
 179
 180       if Loaded then
 181          Load (File, Buf, Ptr, '#', ':', Loaded);
 182
 183          if Loaded then
 184             Hash_Loc := Ptr;
 185             Load_Extended_Digits (File, Buf, Ptr);
 186             Load (File, Buf, Ptr, Buf (Hash_Loc));
 187          end if;
 188
 189          Load (File, Buf, Ptr, 'E', 'e', Loaded);
 190
 191          if Loaded then
 192
 193             --  Note: it is strange to allow a minus sign, since the syntax
 194             --  does not, but that is what ACVC test CE3704F, case (6) wants
 195             --  for the signed case, and there seems no good reason to treat
 196             --  exponents differently for the signed and unsigned cases.
 197
 198             Load (File, Buf, Ptr, '+', '-');
 199             Load_Digits (File, Buf, Ptr);
 200          end if;
 201       end if;
 202    end Load_Modular;
 203
 204    -------------
 205    -- Put_LLU --
 206    -------------
 207
 208    procedure Put_LLU
 209      (File  : File_Type;
 210       Item  : Long_Long_Unsigned;
 211       Width : Field;
 212       Base  : Number_Base)
 213    is
 214       Buf : String (1 .. Field'Last);
 215       Ptr : Natural := 0;
 216
 217    begin
 218       if Base = 10 and then Width = 0 then
 219          Set_Image_Long_Long_Unsigned (Item, Buf, Ptr);
 220       elsif Base = 10 then
 221          Set_Image_Width_Long_Long_Unsigned (Item, Width, Buf, Ptr);
 222       else
 223          Set_Image_Based_Long_Long_Unsigned (Item, Base, Width, Buf, Ptr);
 224       end if;
 225
 226       Put_Item (File, Buf (1 .. Ptr));
 227    end Put_LLU;
 228
 229    -------------
 230    -- Put_Uns --
 231    -------------
 232
 233    procedure Put_Uns
 234      (File  : File_Type;
 235       Item  : Unsigned;
 236       Width : Field;
 237       Base  : Number_Base)
 238    is
 239       Buf : String (1 .. Field'Last);
 240       Ptr : Natural := 0;
 241
 242    begin
 243       if Base = 10 and then Width = 0 then
 244          Set_Image_Unsigned (Item, Buf, Ptr);
 245       elsif Base = 10 then
 246          Set_Image_Width_Unsigned (Item, Width, Buf, Ptr);
 247       else
 248          Set_Image_Based_Unsigned (Item, Base, Width, Buf, Ptr);
 249       end if;
 250
 251       Put_Item (File, Buf (1 .. Ptr));
 252    end Put_Uns;
 253
 254    --------------
 255    -- Puts_LLU --
 256    --------------
 257
 258    procedure Puts_LLU
 259      (To   : out String;
 260       Item : Long_Long_Unsigned;
 261       Base : Number_Base)
 262    is
 263       Buf : String (1 .. Field'Last);
 264       Ptr : Natural := 0;
 265
 266    begin
 267       if Base = 10 then
 268          Set_Image_Width_Long_Long_Unsigned (Item, To'Length, Buf, Ptr);
 269       else
 270          Set_Image_Based_Long_Long_Unsigned (Item, Base, To'Length, Buf, Ptr);
 271       end if;
 272
 273       if Ptr > To'Length then
 274          raise Layout_Error;
 275       else
 276          To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
 277       end if;
 278    end Puts_LLU;
 279
 280    --------------
 281    -- Puts_Uns --
 282    --------------
 283
 284    procedure Puts_Uns
 285      (To   : out String;
 286       Item : Unsigned;
 287       Base : Number_Base)
 288    is
 289       Buf : String (1 .. Field'Last);
 290       Ptr : Natural := 0;
 291
 292    begin
 293       if Base = 10 then
 294          Set_Image_Width_Unsigned (Item, To'Length, Buf, Ptr);
 295       else
 296          Set_Image_Based_Unsigned (Item, Base, To'Length, Buf, Ptr);
 297       end if;
 298
 299       if Ptr > To'Length then
 300          raise Layout_Error;
 301       else
 302          To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
 303       end if;
 304    end Puts_Uns;
 305
 306 end Ada.Text_IO.Modular_Aux;