1 /***************************************************************************
2 * Copyright (C) 2005-2016 by the Quassel Project *
3 * devel@quassel-irc.org *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) version 3. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
19 ***************************************************************************/
27 #include <QCoreApplication>
35 // MIBenum values from http://www.iana.org/assignments/character-sets/character-sets.xml#table-character-sets-1
36 static QList<int> utf8DetectionBlacklist = QList<int>()
37 << 39 /* ISO-2022-JP */;
39 QString nickFromMask(const QString &mask)
41 return mask.left(mask.indexOf('!'));
45 QString userFromMask(const QString &mask)
47 const int offset = mask.indexOf('!') + 1;
50 const int length = mask.indexOf('@', offset) - offset;
51 return mask.mid(offset, length >= 0 ? length : -1);
55 QString hostFromMask(const QString &mask)
57 const int excl = mask.indexOf('!');
60 const int offset = mask.indexOf('@', excl + 1) + 1;
61 return offset > 0 && offset < mask.size() ? mask.mid(offset) : QString{};
65 bool isChannelName(const QString &str)
67 static constexpr std::array<quint8, 4> prefixes{{'#', '&', '!', '+'}};
68 return std::any_of(prefixes.cbegin(), prefixes.cend(), [&str](quint8 c) { return c == str[0]; });
72 QString stripFormatCodes(QString message)
74 static QRegExp regEx{"\x03(\\d\\d?(,\\d\\d?)?)?|[\x02\x0f\x12\x16\x1d\x1f]"};
75 return message.remove(regEx);
79 QString stripAcceleratorMarkers(const QString &label_)
81 QString label = label_;
84 p = label.indexOf('&', p);
85 if (p < 0 || p + 1 >= label.length())
88 if (label.at(p + 1).isLetterOrNumber() || label.at(p + 1) == '&')
97 QString decodeString(const QByteArray &input, QTextCodec *codec)
99 if (codec && utf8DetectionBlacklist.contains(codec->mibEnum()))
100 return codec->toUnicode(input);
102 // First, we check if it's utf8. It is very improbable to encounter a string that looks like
103 // valid utf8, but in fact is not. This means that if the input string passes as valid utf8, it
104 // is safe to assume that it is.
105 // Q_ASSERT(sizeof(const char) == sizeof(quint8)); // In God we trust...
108 for (int i = 0; i < input.size(); i++) {
110 // We check a part of a multibyte char. These need to be of the form 10yyyyyy.
111 if ((input[i] & 0xc0) != 0x80) { isUtf8 = false; break; }
115 if ((input[i] & 0x80) == 0x00) continue; // 7 bit is always ok
116 if ((input[i] & 0xf8) == 0xf0) { cnt = 3; continue; } // 4-byte char 11110xxx 10yyyyyy 10zzzzzz 10vvvvvv
117 if ((input[i] & 0xf0) == 0xe0) { cnt = 2; continue; } // 3-byte char 1110xxxx 10yyyyyy 10zzzzzz
118 if ((input[i] & 0xe0) == 0xc0) { cnt = 1; continue; } // 2-byte char 110xxxxx 10yyyyyy
119 isUtf8 = false; break; // 8 bit char, but not utf8!
121 if (isUtf8 && cnt == 0) {
122 QString s = QString::fromUtf8(input);
123 //qDebug() << "Detected utf8:" << s;
126 //QTextCodec *codec = QTextCodec::codecForName(encoding.toLatin1());
127 if (!codec) return QString::fromLatin1(input);
128 return codec->toUnicode(input);
132 uint editingDistance(const QString &s1, const QString &s2)
134 uint n = s1.size()+1;
135 uint m = s2.size()+1;
136 QVector<QVector<uint> > matrix(n, QVector<uint>(m, 0));
138 for (uint i = 0; i < n; i++)
141 for (uint i = 0; i < m; i++)
145 for (uint i = 1; i < n; i++) {
146 for (uint j = 1; j < m; j++) {
147 uint deleteChar = matrix[i-1][j] + 1;
148 uint insertChar = matrix[i][j-1] + 1;
150 if (deleteChar < insertChar)
155 if (s1[i-1] == s2[j-1]) {
156 uint inheritChar = matrix[i-1][j-1];
157 if (inheritChar < min)
164 return matrix[n-1][m-1];
168 QString secondsToString(int timeInSeconds)
170 static QVector<std::pair<int, QString>> timeUnit {
171 std::make_pair(365*24*60*60, QCoreApplication::translate("Quassel::secondsToString()", "year")),
172 std::make_pair(24*60*60, QCoreApplication::translate("Quassel::secondsToString()", "day")),
173 std::make_pair(60*60, QCoreApplication::translate("Quassel::secondsToString()", "h")),
174 std::make_pair(60, QCoreApplication::translate("Quassel::secondsToString()", "min")),
175 std::make_pair(1, QCoreApplication::translate("Quassel::secondsToString()", "sec"))
178 if (timeInSeconds != 0) {
179 QStringList returnString;
180 for (int i = 0; i < timeUnit.size(); i++) {
181 int n = timeInSeconds / timeUnit[i].first;
183 returnString += QString("%1 %2").arg(QString::number(n), timeUnit[i].second);
185 timeInSeconds = timeInSeconds % timeUnit[i].first;
187 return returnString.join(", ");
190 return QString("%1 %2").arg(QString::number(timeInSeconds), timeUnit.last().second);
195 QByteArray prettyDigest(const QByteArray &digest)
197 QByteArray hexDigest = digest.toHex().toUpper();
198 QByteArray prettyDigest;
199 prettyDigest.fill(':', hexDigest.count() + (hexDigest.count() / 2) - 1);
201 for (int i = 0; i * 2 < hexDigest.count(); i++) {
202 prettyDigest.replace(i * 3, 2, hexDigest.mid(i * 2, 2));
208 QString formatCurrentDateTimeInString(const QString &formatStr)
210 // Work on a copy of the string to avoid modifying the input string
211 QString formattedStr = QString(formatStr);
213 // Exit early if there's nothing to format
214 if (formattedStr.isEmpty())
217 // Find %%<text>%% in string. Replace inside text formatted to QDateTime with the current
218 // timestamp, using %%%% as an escape for multiple %% signs.
220 // Simple: "All Quassel clients vanished from the face of the earth... %%hh:mm:ss%%"
221 // > Result: "All Quassel clients vanished from the face of the earth... 23:20:34"
222 // Complex: "Away since %%hh:mm%% on %%dd.MM%% - %%%% not here %%%%"
223 // > Result: "Away since 23:20 on 21.05 - %% not here %%"
225 // Match groups of double % signs - Some text %%inside here%%, and even %%%%:
227 // (...) marks a capturing group
228 // .* matches zero or more characters, not including newlines
229 // Note that '\' must be escaped as '\\'
230 // Helpful interactive website for debugging and explaining: https://regex101.com/
231 QRegExp regExpMatchTime("%%(.*)%%");
233 // Preserve the smallest groups possible to allow for multiple %%blocks%%
234 regExpMatchTime.setMinimal(true);
236 // NOTE: Move regExpMatchTime to a static regular expression if used anywhere that performance
239 // Don't allow a runaway regular expression to loop for too long. This might not happen.. but
240 // when dealing with user input, better to be safe..?
241 int numIterations = 0;
243 // Find each group of %%text here%% starting from the beginning
244 int index = regExpMatchTime.indexIn(formattedStr);
246 QString matchedFormat;
247 while (index >= 0 && numIterations < 512) {
248 // Get the total length of the matched expression
249 matchLength = regExpMatchTime.cap(0).length();
250 // Get the format string, e.g. "this text here" from "%%this text here%%"
251 matchedFormat = regExpMatchTime.cap(1);
252 // Check that there's actual characters inside. A quadruple % (%%%%) represents two %%
254 if (matchedFormat.length() > 0) {
255 // Format the string according to the current date and time. Invalid time format
256 // strings are ignored.
257 formattedStr.replace(index, matchLength,
258 QDateTime::currentDateTime().toString(matchedFormat));
259 // Subtract the length of the removed % signs
260 // E.g. "%%h:mm ap%%" turns into "h:mm ap", removing four % signs, thus -4. This is
261 // used below to determine how far to advance when looking for the next formatting code.
263 } else if (matchLength == 4) {
264 // Remove two of the four percent signs, so '%%%%' escapes to '%%'
265 formattedStr.remove(index, 2);
266 // Subtract the length of the removed % signs, this time removing two % signs, thus -2.
269 // If neither of these match, something went wrong. Don't modify it to be safe.
270 qDebug() << "Unexpected time format when parsing string, no matchedFormat, matchLength "
271 "should be 4, actually is" << matchLength;
274 // Find the next group of %%text here%% starting from where the last group ended
275 index = regExpMatchTime.indexIn(formattedStr, index + matchLength);