claw 1.9.0
 
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log_stream_concise.cpp
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1/*
2 CLAW - a C++ Library Absolutely Wonderful
3
4 CLAW is a free library without any particular aim but being useful to
5 anyone.
6
7 Copyright (C) 2005-2011 Julien Jorge
8
9 This library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Lesser General Public
11 License as published by the Free Software Foundation; either
12 version 2.1 of the License, or (at your option) any later version.
13
14 This library is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
18
19 You should have received a copy of the GNU Lesser General Public
20 License along with this library; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22
23 contact: julien.jorge@stuff-o-matic.com
24*/
31
32#include <algorithm>
33
41 std::size_t max_history_size)
42 : m_stream(s)
43 , m_max_history_size(max_history_size)
44{}
45
53
58void claw::log_stream_concise::write(const std::string& str)
59{
60 std::string::size_type p = str.find_first_of('\n');
61
62 if(p == std::string::npos)
63 m_current_line += str;
64 else
65 {
66 ++p; // includes the '\n'
67 m_current_line += str.substr(0, p);
68
69 output_current_line();
70
71 if(p != str.length())
72 write(str.substr(p));
73 }
74}
75
80{
81 m_stream->flush();
82}
83
87void claw::log_stream_concise::output_current_line()
88{
89 if(std::find(m_previous_lines.begin(), m_previous_lines.end(),
90 m_current_line)
91 == m_previous_lines.end())
92 {
93 m_previous_lines.push_back(m_current_line);
94 m_stream->write(m_current_line);
95
96 if(m_previous_lines.size() > m_max_history_size)
97 m_previous_lines.pop_front();
98 }
99
100 m_current_line.clear();
101}
log_stream_concise(log_stream *s, std::size_t max_history_size=25)
Constructor.
virtual ~log_stream_concise()
Destructor.
virtual void write(const std::string &str)
Write a string in the stream.
virtual void flush()
Flush the stream.
Base class for streams accepting log output.
A log stream that does not output a message that have been recently output.