File : a-szuzti.adb
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUN-TIME COMPONENTS --
4 -- --
5 -- ADA.STRINGS.WIDE_WIDE_UNBOUNDED.WIDE_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 -- --
19 -- --
20 -- --
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; use Ada.Wide_Wide_Text_IO;
33
34 package body Ada.Strings.Wide_Wide_Unbounded.Wide_Wide_Text_IO is
35
36 --------------
37 -- Get_Line --
38 --------------
39
40 function Get_Line return Unbounded_Wide_Wide_String is
41 Buffer : Wide_Wide_String (1 .. 1000);
42 Last : Natural;
43 Str1 : Wide_Wide_String_Access;
44 Str2 : Wide_Wide_String_Access;
45 Result : Unbounded_Wide_Wide_String;
46
47 begin
48 Get_Line (Buffer, Last);
49 Str1 := new Wide_Wide_String'(Buffer (1 .. Last));
50 while Last = Buffer'Last loop
51 Get_Line (Buffer, Last);
52 Str2 := new Wide_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_Wide_Text_IO.File_Type) return Unbounded_Wide_Wide_String
66 is
67 Buffer : Wide_Wide_String (1 .. 1000);
68 Last : Natural;
69 Str1 : Wide_Wide_String_Access;
70 Str2 : Wide_Wide_String_Access;
71 Result : Unbounded_Wide_Wide_String;
72
73 begin
74 Get_Line (File, Buffer, Last);
75 Str1 := new Wide_Wide_String'(Buffer (1 .. Last));
76
77 while Last = Buffer'Last loop
78 Get_Line (File, Buffer, Last);
79 Str2 := new Wide_Wide_String (1 .. Str1'Last + Last);
80 Str2 (Str1'Range) := Str1.all;
81 Str2 (Str1'Last + 1 .. Str2'Last) := Buffer (1 .. Last);
82 Free (Str1);
83 Str1 := Str2;
84 end loop;
85
86 Result.Reference := Str1;
87 Result.Last := Str1'Length;
88 return Result;
89 end Get_Line;
90
91 procedure Get_Line (Item : out Unbounded_Wide_Wide_String) is
92 begin
93 Get_Line (Current_Input, Item);
94 end Get_Line;
95
96 procedure Get_Line
97 (File : Ada.Wide_Wide_Text_IO.File_Type;
98 Item : out Unbounded_Wide_Wide_String)
99 is
100 begin
101 -- We are going to read into the string that is already there and
102 -- allocated. Hopefully it is big enough now, if not, we will extend
103 -- it in the usual manner using Realloc_For_Chunk.
104
105 -- Make sure we start with at least 80 characters
106
107 if Item.Reference'Last < 80 then
108 Realloc_For_Chunk (Item, 80);
109 end if;
110
111 -- Loop to read data, filling current string as far as possible.
112 -- Item.Last holds the number of characters read so far.
113
114 Item.Last := 0;
115 loop
116 Get_Line
117 (File,
118 Item.Reference (Item.Last + 1 .. Item.Reference'Last),
119 Item.Last);
120
121 -- If we hit the end of the line before the end of the buffer, then
122 -- we are all done, and the result length is properly set.
123
124 if Item.Last < Item.Reference'Last then
125 return;
126 end if;
127
128 -- If not enough room, double it and keep reading
129
130 Realloc_For_Chunk (Item, Item.Last);
131 end loop;
132 end Get_Line;
133
134 ---------
135 -- Put --
136 ---------
137
138 procedure Put (U : Unbounded_Wide_Wide_String) is
139 begin
140 Put (U.Reference (1 .. U.Last));
141 end Put;
142
143 procedure Put (File : File_Type; U : Unbounded_Wide_Wide_String) is
144 begin
145 Put (File, U.Reference (1 .. U.Last));
146 end Put;
147
148 --------------
149 -- Put_Line --
150 --------------
151
152 procedure Put_Line (U : Unbounded_Wide_Wide_String) is
153 begin
154 Put_Line (U.Reference (1 .. U.Last));
155 end Put_Line;
156
157 procedure Put_Line (File : File_Type; U : Unbounded_Wide_Wide_String) is
158 begin
159 Put_Line (File, U.Reference (1 .. U.Last));
160 end Put_Line;
161
162 end Ada.Strings.Wide_Wide_Unbounded.Wide_Wide_Text_IO;