gcc/ada/libgnat/a-ztinau.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --    A D A . W I D E _ 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) 1992-2018, 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_Wide_Text_IO.Generic_Aux; use Ada.Wide_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_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
 169          --  Deal with based case. We recognize either the standard '#' or the
 170          --  allowed alternative replacement ':' (see RM J.2(3)).
 171
 172          Load (File, Buf, Ptr, '#', ':', Loaded);
 173
 174          if Loaded then
 175             Hash_Loc := Ptr;
 176             Load_Extended_Digits (File, Buf, Ptr);
 177             Load (File, Buf, Ptr, Buf (Hash_Loc));
 178          end if;
 179
 180          Load (File, Buf, Ptr, 'E', 'e', Loaded);
 181
 182          if Loaded then
 183
 184             --  Note: it is strange to allow a minus sign, since the syntax
 185             --  does not, but that is what ACVC test CE3704F, case (6) wants.
 186
 187             Load (File, Buf, Ptr, '+', '-');
 188             Load_Digits (File, Buf, Ptr);
 189          end if;
 190       end if;
 191    end Load_Integer;
 192
 193    -------------
 194    -- Put_Int --
 195    -------------
 196
 197    procedure Put_Int
 198      (File  : File_Type;
 199       Item  : Integer;
 200       Width : Field;
 201       Base  : Number_Base)
 202    is
 203       Buf : String (1 .. Field'Last);
 204       Ptr : Natural := 0;
 205
 206    begin
 207       if Base = 10 and then Width = 0 then
 208          Set_Image_Integer (Item, Buf, Ptr);
 209       elsif Base = 10 then
 210          Set_Image_Width_Integer (Item, Width, Buf, Ptr);
 211       else
 212          Set_Image_Based_Integer (Item, Base, Width, Buf, Ptr);
 213       end if;
 214
 215       Put_Item (File, Buf (1 .. Ptr));
 216    end Put_Int;
 217
 218    -------------
 219    -- Put_LLI --
 220    -------------
 221
 222    procedure Put_LLI
 223      (File  : File_Type;
 224       Item  : Long_Long_Integer;
 225       Width : Field;
 226       Base  : Number_Base)
 227    is
 228       Buf : String (1 .. Field'Last);
 229       Ptr : Natural := 0;
 230
 231    begin
 232       if Base = 10 and then Width = 0 then
 233          Set_Image_Long_Long_Integer (Item, Buf, Ptr);
 234       elsif Base = 10 then
 235          Set_Image_Width_Long_Long_Integer (Item, Width, Buf, Ptr);
 236       else
 237          Set_Image_Based_Long_Long_Integer (Item, Base, Width, Buf, Ptr);
 238       end if;
 239
 240       Put_Item (File, Buf (1 .. Ptr));
 241    end Put_LLI;
 242
 243    --------------
 244    -- Puts_Int --
 245    --------------
 246
 247    procedure Puts_Int
 248      (To   : out String;
 249       Item : Integer;
 250       Base : Number_Base)
 251    is
 252       Buf : String (1 .. Field'Last);
 253       Ptr : Natural := 0;
 254
 255    begin
 256       if Base = 10 then
 257          Set_Image_Width_Integer (Item, To'Length, Buf, Ptr);
 258       else
 259          Set_Image_Based_Integer (Item, Base, To'Length, Buf, Ptr);
 260       end if;
 261
 262       if Ptr > To'Length then
 263          raise Layout_Error;
 264       else
 265          To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
 266       end if;
 267    end Puts_Int;
 268
 269    --------------
 270    -- Puts_LLI --
 271    --------------
 272
 273    procedure Puts_LLI
 274      (To   : out String;
 275       Item : Long_Long_Integer;
 276       Base : Number_Base)
 277    is
 278       Buf : String (1 .. Field'Last);
 279       Ptr : Natural := 0;
 280
 281    begin
 282       if Base = 10 then
 283          Set_Image_Width_Long_Long_Integer (Item, To'Length, Buf, Ptr);
 284       else
 285          Set_Image_Based_Long_Long_Integer (Item, Base, To'Length, Buf, Ptr);
 286       end if;
 287
 288       if Ptr > To'Length then
 289          raise Layout_Error;
 290       else
 291          To (To'First .. To'First + Ptr - 1) := Buf (1 .. Ptr);
 292       end if;
 293    end Puts_LLI;
 294
 295 end Ada.Wide_Wide_Text_IO.Integer_Aux;