mirror of
https://github.com/rakshasa/rtorrent.git
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stickz
e7fc891f11
This cleanup adjusts the rTorrent code to comply with c++17 standard. It also simplifies various parts of the code.
112 lines
3.4 KiB
C++
112 lines
3.4 KiB
C++
// rak - Rakshasa's toolbox
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// Copyright (C) 2005-2007, Jari Sundell
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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// In addition, as a special exception, the copyright holders give
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// permission to link the code of portions of this program with the
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// OpenSSL library under certain conditions as described in each
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// individual source file, and distribute linked combinations
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// including the two.
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//
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// You must obey the GNU General Public License in all respects for
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// all of the code used other than OpenSSL. If you modify file(s)
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// with this exception, you may extend this exception to your version
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// of the file(s), but you are not obligated to do so. If you do not
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// wish to do so, delete this exception statement from your version.
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// If you delete this exception statement from all source files in the
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// program, then also delete it here.
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//
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// Contact: Jari Sundell <jaris@ifi.uio.no>
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//
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// Skomakerveien 33
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// 3185 Skoppum, NORWAY
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// This is a hacked up whole string pattern matching. Replace with
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// TR1's regex when that becomes widely available. It is intended for
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// small strings.
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#ifndef RAK_REGEX_H
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#define RAK_REGEX_H
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#include <sys/types.h>
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#include <algorithm>
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#include <functional>
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#include <string>
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#include <list>
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namespace rak {
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class regex : public std::function<bool (std::string)> {
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public:
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regex() {}
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regex(const std::string& p) : m_pattern(p) {}
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const std::string& pattern() const { return m_pattern; }
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bool operator () (const std::string& p) const;
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private:
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std::string m_pattern;
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};
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// This isn't optimized, or very clean. A simple hack that should work.
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inline bool
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regex::operator () (const std::string& text) const {
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if (m_pattern.empty() ||
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text.empty() ||
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(m_pattern[0] != '*' && m_pattern[0] != text[0]))
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return false;
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// Replace with unordered_vector?
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std::list<unsigned int> paths;
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paths.push_front(0);
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for (std::string::const_iterator itrText = ++text.begin(), lastText = text.end(); itrText != lastText; ++itrText) {
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for (std::list<unsigned int>::iterator itrPaths = paths.begin(), lastPaths = paths.end(); itrPaths != lastPaths; ) {
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unsigned int next = *itrPaths + 1;
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if (m_pattern[*itrPaths] != '*')
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itrPaths = paths.erase(itrPaths);
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else
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itrPaths++;
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// When we reach the end of 'm_pattern', we don't have a whole
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// match of 'text'.
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if (next == m_pattern.size())
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continue;
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// Push to the back so that '*' will match zero length strings.
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if (m_pattern[next] == '*')
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paths.push_back(next);
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if (m_pattern[next] == *itrText)
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paths.push_front(next);
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}
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if (paths.empty())
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return false;
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}
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return std::find(paths.begin(), paths.end(), m_pattern.size() - 1) != paths.end();
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}
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}
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#endif
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