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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT RUN-TIME COMPONENTS                         --
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--                                                                          --
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--                  ADA.STRINGS.WIDE_UNBOUNDED.WIDE_TEXT_IO                 --
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--                                                                          --
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--                                 B o d y                                  --
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--                                                                          --
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--          Copyright (C) 1997-2009, Free Software Foundation, Inc.         --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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--                                                                          --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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with Ada.Wide_Text_IO; use Ada.Wide_Text_IO;
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package body Ada.Strings.Wide_Unbounded.Wide_Text_IO is
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   --------------
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   -- Get_Line --
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   --------------
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   function Get_Line return Unbounded_Wide_String is
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      Buffer : Wide_String (1 .. 1000);
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      Last   : Natural;
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      Str1   : Wide_String_Access;
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      Str2   : Wide_String_Access;
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      Result : Unbounded_Wide_String;
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   begin
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      Get_Line (Buffer, Last);
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      Str1 := new Wide_String'(Buffer (1 .. Last));
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      while Last = Buffer'Last loop
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         Get_Line (Buffer, Last);
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         Str2 := new Wide_String (1 .. Str1'Last + Last);
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         Str2 (Str1'Range) := Str1.all;
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         Str2 (Str1'Last + 1 .. Str2'Last) := Buffer (1 .. Last);
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         Free (Str1);
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         Str1 := Str2;
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      end loop;
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      Result.Reference := Str1;
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      Result.Last      := Str1'Length;
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      return Result;
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   end Get_Line;
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   function Get_Line
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     (File : Ada.Wide_Text_IO.File_Type) return Unbounded_Wide_String
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   is
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      Buffer : Wide_String (1 .. 1000);
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      Last   : Natural;
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      Str1   : Wide_String_Access;
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      Str2   : Wide_String_Access;
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      Result : Unbounded_Wide_String;
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   begin
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      Get_Line (File, Buffer, Last);
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      Str1 := new Wide_String'(Buffer (1 .. Last));
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      while Last = Buffer'Last loop
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         Get_Line (File, Buffer, Last);
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         Str2 := new Wide_String (1 .. Str1'Last + Last);
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         Str2 (Str1'Range) := Str1.all;
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         Str2 (Str1'Last + 1 .. Str2'Last) := Buffer (1 .. Last);
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         Free (Str1);
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         Str1 := Str2;
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      end loop;
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      Result.Reference := Str1;
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      Result.Last      := Str1'Length;
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      return Result;
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   end Get_Line;
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   procedure Get_Line (Item : out Unbounded_Wide_String) is
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   begin
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      Get_Line (Current_Input, Item);
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   end Get_Line;
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   procedure Get_Line
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     (File : Ada.Wide_Text_IO.File_Type;
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      Item : out Unbounded_Wide_String)
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   is
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   begin
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      --  We are going to read into the string that is already there and
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      --  allocated. Hopefully it is big enough now, if not, we will extend
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      --  it in the usual manner using Realloc_For_Chunk.
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      --  Make sure we start with at least 80 characters
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      if Item.Reference'Last < 80 then
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         Realloc_For_Chunk (Item, 80);
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      end if;
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      --  Loop to read data, filling current string as far as possible.
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      --  Item.Last holds the number of characters read so far.
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      Item.Last := 0;
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      loop
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         Get_Line
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           (File,
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            Item.Reference (Item.Last + 1 .. Item.Reference'Last),
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            Item.Last);
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         --  If we hit the end of the line before the end of the buffer, then
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         --  we are all done, and the result length is properly set.
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         if Item.Last < Item.Reference'Last then
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            return;
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         end if;
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         --  If not enough room, double it and keep reading
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         Realloc_For_Chunk (Item, Item.Last);
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      end loop;
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   end Get_Line;
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   ---------
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   -- Put --
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   ---------
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   procedure Put (U : Unbounded_Wide_String) is
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   begin
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      Put (U.Reference (1 .. U.Last));
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   end Put;
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   procedure Put (File : File_Type; U : Unbounded_Wide_String) is
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   begin
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      Put (File, U.Reference (1 .. U.Last));
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   end Put;
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   --------------
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   -- Put_Line --
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   --------------
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   procedure Put_Line (U : Unbounded_Wide_String) is
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   begin
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      Put_Line (U.Reference (1 .. U.Last));
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   end Put_Line;
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   procedure Put_Line (File : File_Type; U : Unbounded_Wide_String) is
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   begin
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      Put_Line (File, U.Reference (1 .. U.Last));
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   end Put_Line;
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end Ada.Strings.Wide_Unbounded.Wide_Text_IO;

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