gcc/ada/libgnat/a-wwboio.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --     A D A . W I D E _ T E X T _ I O . W I D E _ B O U N D E D _ I O      --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1997-2021, Free Software Foundation, Inc.         --
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  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- --
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  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.Unchecked_Deallocation;
  33
  34 package body Ada.Wide_Text_IO.Wide_Bounded_IO is
  35
  36    type Wide_String_Access is access all Wide_String;
  37
  38    procedure Free (WSA : in out Wide_String_Access);
  39    --  Perform an unchecked deallocation of a non-null string
  40
  41    ----------
  42    -- Free --
  43    ----------
  44
  45    procedure Free (WSA : in out Wide_String_Access) is
  46       Null_Wide_String : constant Wide_String := "";
  47
  48       procedure Deallocate is
  49         new Ada.Unchecked_Deallocation (Wide_String, Wide_String_Access);
  50
  51    begin
  52       --  Do not try to free statically allocated null string
  53
  54       if WSA.all /= Null_Wide_String then
  55          Deallocate (WSA);
  56       end if;
  57    end Free;
  58
  59    --------------
  60    -- Get_Line --
  61    --------------
  62
  63    function Get_Line return Wide_Bounded.Bounded_Wide_String is
  64    begin
  65       return Wide_Bounded.To_Bounded_Wide_String (Get_Line);
  66    end Get_Line;
  67
  68    --------------
  69    -- Get_Line --
  70    --------------
  71
  72    function Get_Line
  73      (File : File_Type) return Wide_Bounded.Bounded_Wide_String
  74    is
  75    begin
  76       return Wide_Bounded.To_Bounded_Wide_String (Get_Line (File));
  77    end Get_Line;
  78
  79    --------------
  80    -- Get_Line --
  81    --------------
  82
  83    procedure Get_Line
  84      (Item : out Wide_Bounded.Bounded_Wide_String)
  85    is
  86       Buffer : Wide_String (1 .. 1000);
  87       Last   : Natural;
  88       Str1   : Wide_String_Access;
  89       Str2   : Wide_String_Access;
  90
  91    begin
  92       Get_Line (Buffer, Last);
  93       Str1 := new Wide_String'(Buffer (1 .. Last));
  94
  95       while Last = Buffer'Last loop
  96          Get_Line (Buffer, Last);
  97          Str2 := new Wide_String'(Str1.all & Buffer (1 .. Last));
  98          Free (Str1);
  99          Str1 := Str2;
 100       end loop;
 101
 102       Item := Wide_Bounded.To_Bounded_Wide_String (Str1.all);
 103    end Get_Line;
 104
 105    --------------
 106    -- Get_Line --
 107    --------------
 108
 109    procedure Get_Line
 110      (File : File_Type;
 111       Item : out Wide_Bounded.Bounded_Wide_String)
 112    is
 113       Buffer : Wide_String (1 .. 1000);
 114       Last   : Natural;
 115       Str1   : Wide_String_Access;
 116       Str2   : Wide_String_Access;
 117
 118    begin
 119       Get_Line (File, Buffer, Last);
 120       Str1 := new Wide_String'(Buffer (1 .. Last));
 121
 122       while Last = Buffer'Last loop
 123          Get_Line (File, Buffer, Last);
 124          Str2 := new Wide_String'(Str1.all & Buffer (1 .. Last));
 125          Free (Str1);
 126          Str1 := Str2;
 127       end loop;
 128
 129       Item := Wide_Bounded.To_Bounded_Wide_String (Str1.all);
 130    end Get_Line;
 131
 132    ---------
 133    -- Put --
 134    ---------
 135
 136    procedure Put
 137      (Item : Wide_Bounded.Bounded_Wide_String)
 138    is
 139    begin
 140       Put (Wide_Bounded.To_Wide_String (Item));
 141    end Put;
 142
 143    ---------
 144    -- Put --
 145    ---------
 146
 147    procedure Put
 148      (File : File_Type;
 149       Item : Wide_Bounded.Bounded_Wide_String)
 150    is
 151    begin
 152       Put (File, Wide_Bounded.To_Wide_String (Item));
 153    end Put;
 154
 155    --------------
 156    -- Put_Line --
 157    --------------
 158
 159    procedure Put_Line
 160      (Item : Wide_Bounded.Bounded_Wide_String)
 161    is
 162    begin
 163       Put_Line (Wide_Bounded.To_Wide_String (Item));
 164    end Put_Line;
 165
 166    --------------
 167    -- Put_Line --
 168    --------------
 169
 170    procedure Put_Line
 171      (File : File_Type;
 172       Item : Wide_Bounded.Bounded_Wide_String)
 173    is
 174    begin
 175       Put_Line (File, Wide_Bounded.To_Wide_String (Item));
 176    end Put_Line;
 177
 178 end Ada.Wide_Text_IO.Wide_Bounded_IO;