2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2011 Adam <Adam@anope.org>
5 * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
6 * Copyright (C) 2007, 2009 Dennis Friis <peavey@inspircd.org>
7 * Copyright (C) 2005-2009 Craig Edwards <craigedwards@brainbox.cc>
8 * Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
9 * Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
11 * This file is part of InspIRCd. InspIRCd is free software: you can
12 * redistribute it and/or modify it under the terms of the GNU General Public
13 * License as published by the Free Software Foundation, version 2.
15 * This program is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
20 * You should have received a copy of the GNU General Public License
21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
36 /*******************************************************
37 * This file contains classes and templates that deal
38 * with the comparison and hashing of 'irc strings'.
39 * An 'irc string' is a string which compares in a
40 * case insensitive manner, and as per RFC 1459 will
41 * treat [ identical to {, ] identical to }, and \
44 * There are functors that accept std::string and
45 * compare/hash them as type irc::string by using
46 * mapping arrays internally.
47 *******************************************************/
49 /** Seperate from the other casemap tables so that code *can* still exclusively rely on RFC casemapping
52 * This is provided as a pointer so that modules can change it to their custom mapping tables,
53 * e.g. for national character support.
55 CoreExport extern unsigned const char *national_case_insensitive_map;
57 /** A mapping of uppercase to lowercase, including scandinavian
58 * 'oddities' as specified by RFC1459, e.g. { -> [, and | -> \
60 CoreExport extern unsigned const char rfc_case_insensitive_map[256];
62 /** Case insensitive map, ASCII rules.
66 CoreExport extern unsigned const char ascii_case_insensitive_map[256];
68 /** The irc namespace contains a number of helper classes.
72 /** Check if two IRC object (e.g. nick or channel) names are equal.
73 * This function uses national_case_insensitive_map to determine equality, which, by default does comparison
74 * according to RFC 1459, treating certain otherwise non-identical characters as identical.
75 * @param s1 First string to compare
76 * @param s2 Second string to compare
77 * @return True if the two names are equal, false otherwise
79 CoreExport bool equals(const std::string& s1, const std::string& s2);
81 /** Check whether \p needle exists within \p haystack.
82 * @param haystack The string to search within.
83 * @param needle The string to search for.
84 * @return Either the index at which \p needle was found or std::string::npos.
86 CoreExport size_t find(const std::string& haystack, const std::string& needle);
88 /** This class returns true if two strings match.
89 * Case sensitivity is ignored, and the RFC 'character set'
94 /** The operator () does the actual comparison in hash_map
96 bool operator()(const std::string& s1, const std::string& s2) const
98 return equals(s1, s2);
104 size_t CoreExport operator()(const std::string &s) const;
107 struct insensitive_swo
109 bool CoreExport operator()(const std::string& a, const std::string& b) const;
112 /** irc::sepstream allows for splitting token seperated lists.
113 * Each successive call to sepstream::GetToken() returns
114 * the next token, until none remain, at which point the method returns
117 class CoreExport sepstream
126 /** Current string position
129 /** If set then GetToken() can return an empty string
133 /** Create a sepstream and fill it with the provided data
135 sepstream(const std::string &source, char separator, bool allowempty = false);
137 /** Fetch the next token from the stream
138 * @param token The next token from the stream is placed here
139 * @return True if tokens still remain, false if there are none left
141 bool GetToken(std::string& token);
143 /** Fetch the next numeric token from the stream
144 * @param token The next token from the stream is placed here
145 * @return True if tokens still remain, false if there are none left
147 template<typename Numeric>
148 bool GetNumericToken(Numeric& token)
154 token = ConvToNum<Numeric>(str);
158 /** Fetch the entire remaining stream, without tokenizing
159 * @return The remaining part of the stream
161 const std::string GetRemaining();
163 /** Returns true if the end of the stream has been reached
164 * @return True if the end of the stream has been reached, otherwise false
168 /** Returns true if the specified value exists in the stream
169 * @param value The value to search for
170 * @return True if the value was found, False otherwise
172 bool Contains(const std::string& value);
175 /** A derived form of sepstream, which seperates on commas
177 class CoreExport commasepstream : public sepstream
180 /** Initialize with comma separator
182 commasepstream(const std::string &source, bool allowempty = false) : sepstream(source, ',', allowempty)
187 /** A derived form of sepstream, which seperates on spaces
189 class CoreExport spacesepstream : public sepstream
192 /** Initialize with space separator
194 spacesepstream(const std::string &source, bool allowempty = false) : sepstream(source, ' ', allowempty)
199 /** irc::tokenstream reads a string formatted as per RFC1459 and RFC2812.
200 * It will split the string into 'tokens' each containing one parameter
202 * For instance, if it is instantiated with the string:
203 * "PRIVMSG #test :foo bar baz qux"
204 * then each successive call to tokenstream::GetToken() will return
205 * "PRIVMSG", "#test", "foo bar baz qux", "".
206 * Note that if the whole string starts with a colon this is not taken
207 * to mean the string is all one parameter, and the first item in the
208 * list will be ":item". This is to allow for parsing 'source' fields
211 class CoreExport tokenstream
214 /** The message we are parsing tokens from. */
217 /** The current position within the message. */
221 /** Create a tokenstream and fill it with the provided data. */
222 tokenstream(const std::string& msg, size_t start = 0, size_t end = std::string::npos);
224 /** Retrieves the underlying message. */
225 std::string& GetMessage() { return message; }
227 /** Retrieve the next \<middle> token in the token stream.
228 * @param token The next token available, or an empty string if none remain.
229 * @return True if tokens are left to be read, false if the last token was just retrieved.
231 bool GetMiddle(std::string& token);
233 /** Retrieve the next \<trailing> token in the token stream.
234 * @param token The next token available, or an empty string if none remain.
235 * @return True if tokens are left to be read, false if the last token was just retrieved.
237 bool GetTrailing(std::string& token);
240 /** The portparser class seperates out a port range into integers.
241 * A port range may be specified in the input string in the form
242 * "6660,6661,6662-6669,7020". The end of the stream is indicated by
243 * a return value of 0 from portparser::GetToken(). If you attempt
244 * to specify an illegal range (e.g. one where start >= end, or
245 * start or end < 0) then GetToken() will return the first element
246 * of the pair of numbers.
248 class CoreExport portparser
252 /** Used to split on commas
256 /** Current position in a range of ports
260 /** Starting port in a range of ports
264 /** Ending port in a range of ports
268 /** Allow overlapped port ranges
272 /** Used to determine overlapping of ports
273 * without O(n) algorithm being used
275 std::set<long> overlap_set;
277 /** Returns true if val overlaps an existing range
279 bool Overlaps(long val);
282 /** Create a portparser and fill it with the provided data
283 * @param source The source text to parse from
284 * @param allow_overlapped Allow overlapped ranges
286 portparser(const std::string &source, bool allow_overlapped = true);
288 /** Fetch the next token from the stream
289 * @return The next port number is returned, or 0 if none remain