/src/wrappers/readline/library/read_line.e

 1deferred class READ_LINE
 2-- Interface to the GNU readline library
 3
 4-- Insert this class to get access to library interface.
 5
 6insert
 7   WRAPPER_HANDLER
 8   READLINE_EXTERNALS
 9   STRING_HANDLER
10      undefine
11         is_equal, copy
12      end
13
14feature {ANY} -- Read line
15   prompt: ABSTRACT_STRING
16         -- The prompt presented to the user
17
18   last_line: STRING -- The last line read by `read_line'
19
20   read_line
21         -- Print `prompt' and read a line, put into `last_line'
22      local
23         p: POINTER
24      do
25         p := readline(null_or_string(prompt))
26         if p.is_not_null then
27            create last_line.from_external(p)
28         else
29            -- if ^D is pressed
30            last_line := Void
31         end
32      end
33
34   buffer: FIXED_STRING
35      do
36         Result := buffer_
37         Result.from_external(rl_line_buffer)
38      end
39
40   completion: READ_LINE_COMPLETION
41      local
42         c: READLINE_CECIL -- we need that indirection to force Liberty Eiffel to "see" the assignment READLINE_CECIL -> READ_LINE_COMPLETION
43      once
44         create {READ_LINE_COMPLETION} c.make
45         Result ::= c
46      end
47
48   history: READ_LINE_HISTORY
49      once
50         create Result.using_history
51      end
52
53feature {}
54   buffer_: FIXED_STRING
55      once
56         create Result.make_from_string("deadstring")
57      end
58
59end -- class READ_LINE
60
61-- Copyright (C) 2010-2017: Paolo Redaelli, 2012 Cyril Adrian
62
63-- This library is free software: you can redistribute it and/or modify
64-- it under the terms of the GNU General Public License as published by
65-- the Free Software Foundation, either version 3 of the License, or
66-- (at your option) any later version.
67--
68-- This package is distributed in the hope that it will be useful,
69-- but WITHOUT ANY WARRANTY; without even the implied warranty of
70-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
71-- GNU General Public License for more details.
72--
73-- You should have received a copy of the GNU General Public License
74-- along with Readline.  If not, see <http://www.gnu.org/licenses/>.