1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT RUN-TIME COMPONENTS                         --
4--                                                                          --
5--                  ADA.STRINGS.WIDE_UNBOUNDED.WIDE_TEXT_IO                 --
6--                                                                          --
7--                                 B o d y                                  --
8--                                                                          --
9--          Copyright (C) 1997-2009, 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
32with Ada.Wide_Text_IO; use Ada.Wide_Text_IO;
33
34package body Ada.Strings.Wide_Unbounded.Wide_Text_IO is
35
36   --------------
37   -- Get_Line --
38   --------------
39
40   function Get_Line return Unbounded_Wide_String is
41      Buffer : Wide_String (1 .. 1000);
42      Last   : Natural;
43      Str1   : Wide_String_Access;
44      Str2   : Wide_String_Access;
45      Result : Unbounded_Wide_String;
46
47   begin
48      Get_Line (Buffer, Last);
49      Str1 := new Wide_String'(Buffer (1 .. Last));
50      while Last = Buffer'Last loop
51         Get_Line (Buffer, Last);
52         Str2 := new Wide_String (1 .. Str1'Last + Last);
53         Str2 (Str1'Range) := Str1.all;
54         Str2 (Str1'Last + 1 .. Str2'Last) := Buffer (1 .. Last);
55         Free (Str1);
56         Str1 := Str2;
57      end loop;
58
59      Result.Reference := Str1;
60      Result.Last      := Str1'Length;
61      return Result;
62   end Get_Line;
63
64   function Get_Line
65     (File : Ada.Wide_Text_IO.File_Type) return Unbounded_Wide_String
66   is
67      Buffer : Wide_String (1 .. 1000);
68      Last   : Natural;
69      Str1   : Wide_String_Access;
70      Str2   : Wide_String_Access;
71      Result : Unbounded_Wide_String;
72
73   begin
74      Get_Line (File, Buffer, Last);
75      Str1 := new Wide_String'(Buffer (1 .. Last));
76      while Last = Buffer'Last loop
77         Get_Line (File, Buffer, Last);
78         Str2 := new Wide_String (1 .. Str1'Last + Last);
79         Str2 (Str1'Range) := Str1.all;
80         Str2 (Str1'Last + 1 .. Str2'Last) := Buffer (1 .. Last);
81         Free (Str1);
82         Str1 := Str2;
83      end loop;
84
85      Result.Reference := Str1;
86      Result.Last      := Str1'Length;
87      return Result;
88   end Get_Line;
89
90   procedure Get_Line (Item : out Unbounded_Wide_String) is
91   begin
92      Get_Line (Current_Input, Item);
93   end Get_Line;
94
95   procedure Get_Line
96     (File : Ada.Wide_Text_IO.File_Type;
97      Item : out Unbounded_Wide_String)
98   is
99   begin
100      --  We are going to read into the string that is already there and
101      --  allocated. Hopefully it is big enough now, if not, we will extend
102      --  it in the usual manner using Realloc_For_Chunk.
103
104      --  Make sure we start with at least 80 characters
105
106      if Item.Reference'Last < 80 then
107         Realloc_For_Chunk (Item, 80);
108      end if;
109
110      --  Loop to read data, filling current string as far as possible.
111      --  Item.Last holds the number of characters read so far.
112
113      Item.Last := 0;
114      loop
115         Get_Line
116           (File,
117            Item.Reference (Item.Last + 1 .. Item.Reference'Last),
118            Item.Last);
119
120         --  If we hit the end of the line before the end of the buffer, then
121         --  we are all done, and the result length is properly set.
122
123         if Item.Last < Item.Reference'Last then
124            return;
125         end if;
126
127         --  If not enough room, double it and keep reading
128
129         Realloc_For_Chunk (Item, Item.Last);
130      end loop;
131   end Get_Line;
132
133   ---------
134   -- Put --
135   ---------
136
137   procedure Put (U : Unbounded_Wide_String) is
138   begin
139      Put (U.Reference (1 .. U.Last));
140   end Put;
141
142   procedure Put (File : File_Type; U : Unbounded_Wide_String) is
143   begin
144      Put (File, U.Reference (1 .. U.Last));
145   end Put;
146
147   --------------
148   -- Put_Line --
149   --------------
150
151   procedure Put_Line (U : Unbounded_Wide_String) is
152   begin
153      Put_Line (U.Reference (1 .. U.Last));
154   end Put_Line;
155
156   procedure Put_Line (File : File_Type; U : Unbounded_Wide_String) is
157   begin
158      Put_Line (File, U.Reference (1 .. U.Last));
159   end Put_Line;
160
161end Ada.Strings.Wide_Unbounded.Wide_Text_IO;
162