/src/lib/io/basic/null_input_stream.e

 1-- This file is part of a Liberty Eiffel library.
 2-- See the full copyright at the end.
 3--
 4class NULL_INPUT_STREAM
 5   --
 6   -- This "null" stream provides an unbroken sequence of '%U'
 7   -- (like /dev/zero does on Unix)
 8   --
 9
10inherit
11   TERMINAL_INPUT_STREAM
12      redefine
13         filtered_read_line_in, dispose
14      end
15
16feature {ANY}
17   end_of_input: BOOLEAN False
18
19   is_connected: BOOLEAN True
20
21   can_unread_character: BOOLEAN True
22
23   disconnect
24      do
25         filter := Void
26      end
27
28feature {FILTER_INPUT_STREAM}
29   filtered_read_character
30      do
31      end
32
33   filtered_unread_character
34      do
35      end
36
37   filtered_last_character: CHARACTER '%U'
38
39   filtered_read_line_in (buffer: STRING)
40      do
41      end
42
43feature {FILTER}
44   filtered_descriptor: INTEGER
45      do
46         std_error.put_string("NULL_INPUT_STREAM.filtered_descriptor has been called!%N")
47         crash
48      end
49
50   filtered_has_descriptor: BOOLEAN False
51
52   filtered_stream_pointer: POINTER
53      do
54         std_error.put_string("NULL_INPUT_STREAM.filtered_stream_pointer has been called!%N")
55         crash
56      end
57
58   filtered_has_stream_pointer: BOOLEAN False
59
60feature {}
61   dispose
62      do
63         -- No need to force people to disconnect such a STREAM.
64      end
65
66end -- class NULL_INPUT_STREAM
67--
68-- Copyright (C) 2009-2017: by all the people cited in the AUTHORS file.
69--
70-- Permission is hereby granted, free of charge, to any person obtaining a copy
71-- of this software and associated documentation files (the "Software"), to deal
72-- in the Software without restriction, including without limitation the rights
73-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
74-- copies of the Software, and to permit persons to whom the Software is
75-- furnished to do so, subject to the following conditions:
76--
77-- The above copyright notice and this permission notice shall be included in
78-- all copies or substantial portions of the Software.
79--
80-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
81-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
82-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
83-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
84-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
85-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
86-- THE SOFTWARE.