gcc/ada/a-tiboio.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --               A D A . T E X T _ I O . B O U N D E D _ I O                --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1997-2005, 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.Text_IO; use Ada.Text_IO;
  35 with Ada.Unchecked_Deallocation;
  36
  37 package body Ada.Text_IO.Bounded_IO is
  38
  39    type String_Access is access all String;
  40
  41    procedure Free (SA : in out String_Access);
  42    --  Perform an unchecked deallocation of a non-null string
  43
  44    ----------
  45    -- Free --
  46    ----------
  47
  48    procedure Free (SA : in out String_Access) is
  49       Null_String : constant String := "";
  50
  51       procedure Deallocate is
  52         new Ada.Unchecked_Deallocation (String, String_Access);
  53
  54    begin
  55       --  Do not try to free statically allocated null string
  56
  57       if SA.all /= Null_String then
  58          Deallocate (SA);
  59       end if;
  60    end Free;
  61
  62    --------------
  63    -- Get_Line --
  64    --------------
  65
  66    function Get_Line return Bounded.Bounded_String is
  67    begin
  68       return Bounded.To_Bounded_String (Get_Line);
  69    end Get_Line;
  70
  71    --------------
  72    -- Get_Line --
  73    --------------
  74
  75    function Get_Line
  76      (File : File_Type) return Bounded.Bounded_String
  77    is
  78    begin
  79       return Bounded.To_Bounded_String (Get_Line (File));
  80    end Get_Line;
  81
  82    --------------
  83    -- Get_Line --
  84    --------------
  85
  86    procedure Get_Line
  87      (Item : out Bounded.Bounded_String)
  88    is
  89       Buffer : String (1 .. 1000);
  90       Last   : Natural;
  91       Str1   : String_Access;
  92       Str2   : String_Access;
  93
  94    begin
  95       Get_Line (Buffer, Last);
  96       Str1 := new String'(Buffer (1 .. Last));
  97
  98       while Last = Buffer'Last loop
  99          Get_Line (Buffer, Last);
 100          Str2 := new String'(Str1.all & Buffer (1 .. Last));
 101          Free (Str1);
 102          Str1 := Str2;
 103       end loop;
 104
 105       Item := Bounded.To_Bounded_String (Str1.all);
 106    end Get_Line;
 107
 108    --------------
 109    -- Get_Line --
 110    --------------
 111
 112    procedure Get_Line
 113      (File : File_Type;
 114       Item : out Bounded.Bounded_String)
 115    is
 116       Buffer : String (1 .. 1000);
 117       Last   : Natural;
 118       Str1   : String_Access;
 119       Str2   : String_Access;
 120
 121    begin
 122       Get_Line (File, Buffer, Last);
 123       Str1 := new String'(Buffer (1 .. Last));
 124
 125       while Last = Buffer'Last loop
 126          Get_Line (File, Buffer, Last);
 127          Str2 := new String'(Str1.all & Buffer (1 .. Last));
 128          Free (Str1);
 129          Str1 := Str2;
 130       end loop;
 131
 132       Item := Bounded.To_Bounded_String (Str1.all);
 133    end Get_Line;
 134
 135    ---------
 136    -- Put --
 137    ---------
 138
 139    procedure Put
 140      (Item : Bounded.Bounded_String)
 141    is
 142    begin
 143       Put (Bounded.To_String (Item));
 144    end Put;
 145
 146    ---------
 147    -- Put --
 148    ---------
 149
 150    procedure Put
 151      (File : File_Type;
 152       Item : Bounded.Bounded_String)
 153    is
 154    begin
 155       Put (File, Bounded.To_String (Item));
 156    end Put;
 157
 158    --------------
 159    -- Put_Line --
 160    --------------
 161
 162    procedure Put_Line
 163      (Item : Bounded.Bounded_String)
 164    is
 165    begin
 166       Put_Line (Bounded.To_String (Item));
 167    end Put_Line;
 168
 169    --------------
 170    -- Put_Line --
 171    --------------
 172
 173    procedure Put_Line
 174      (File : File_Type;
 175       Item : Bounded.Bounded_String)
 176    is
 177    begin
 178       Put_Line (File, Bounded.To_String (Item));
 179    end Put_Line;
 180
 181 end Ada.Text_IO.Bounded_IO;