1/***************************************************************************
2 * Copyright (C) 2005-2014 by the Quassel Project *
3 * devel@quassel-irc.org *
4 * *
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. *
9 * *
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. *
14 * *
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 ***************************************************************************/
20
21#include "util.h"
22
23#include <QCoreApplication>
24#include <QDebug>
25#include <QFile>
26#include <QTextCodec>
27
28#include "quassel.h"
29
30class QMetaMethod;
31
32// MIBenum values from http://www.iana.org/assignments/character-sets/character-sets.xml#table-character-sets-1
33static QList<int> utf8DetectionBlacklist = QList<int>()
34 << 39 /* ISO-2022-JP */;
35
36QString nickFromMask(QString mask)
37{
38 return mask.section('!', 0, 0);
39}
40
41
42QString userFromMask(QString mask)
43{
44 QString userhost = mask.section('!', 1);
45 if (userhost.isEmpty()) return QString();
46 return userhost.section('@', 0, 0);
47}
48
49
50QString hostFromMask(QString mask)
51{
52 QString userhost = mask.section('!', 1);
53 if (userhost.isEmpty()) return QString();
54 return userhost.section('@', 1);
55}
56
57
58bool isChannelName(QString str)
59{
60 return QString("#&!+").contains(str[0]);
61}
62
63
64QString stripFormatCodes(QString str)
65{
66 str.remove(QRegExp("\x03(\\d\\d?(,\\d\\d?)?)?"));
67 str.remove('\x02');
68 str.remove('\x0f');
69 str.remove('\x12');
70 str.remove('\x16');
71 str.remove('\x1d');
72 str.remove('\x1f');
73 return str;
74}
75
76
77QString stripAcceleratorMarkers(const QString &label_)
78{
79 QString label = label_;
80 int p = 0;
81 forever {
82 p = label.indexOf('&', p);
83 if (p < 0 || p + 1 >= label.length())
84 break;
85
86 if (label.at(p + 1).isLetterOrNumber() || label.at(p + 1) == '&')
87 label.remove(p, 1);
88
89 ++p;
90 }
91 return label;
92}
93
94
95QString decodeString(const QByteArray &input, QTextCodec *codec)
96{
97 if (codec && utf8DetectionBlacklist.contains(codec->mibEnum()))
98 return codec->toUnicode(input);
99
100 // First, we check if it's utf8. It is very improbable to encounter a string that looks like
101 // valid utf8, but in fact is not. This means that if the input string passes as valid utf8, it
102 // is safe to assume that it is.
103 // Q_ASSERT(sizeof(const char) == sizeof(quint8)); // In God we trust...
104 bool isUtf8 = true;
105 int cnt = 0;
106 for (int i = 0; i < input.size(); i++) {
107 if (cnt) {
108 // We check a part of a multibyte char. These need to be of the form 10yyyyyy.
109 if ((input[i] & 0xc0) != 0x80) { isUtf8 = false; break; }
110 cnt--;
111 continue;
112 }
113 if ((input[i] & 0x80) == 0x00) continue; // 7 bit is always ok
114 if ((input[i] & 0xf8) == 0xf0) { cnt = 3; continue; } // 4-byte char 11110xxx 10yyyyyy 10zzzzzz 10vvvvvv
115 if ((input[i] & 0xf0) == 0xe0) { cnt = 2; continue; } // 3-byte char 1110xxxx 10yyyyyy 10zzzzzz
116 if ((input[i] & 0xe0) == 0xc0) { cnt = 1; continue; } // 2-byte char 110xxxxx 10yyyyyy
117 isUtf8 = false; break; // 8 bit char, but not utf8!
118 }
119 if (isUtf8 && cnt == 0) {
120 QString s = QString::fromUtf8(input);
121 //qDebug() << "Detected utf8:" << s;
122 return s;
123 }
124 //QTextCodec *codec = QTextCodec::codecForName(encoding.toLatin1());
125 if (!codec) return QString::fromLatin1(input);
126 return codec->toUnicode(input);
127}
128
129
130uint editingDistance(const QString &s1, const QString &s2)
131{
132 uint n = s1.size()+1;
133 uint m = s2.size()+1;
134 QVector<QVector<uint> > matrix(n, QVector<uint>(m, 0));
135
136 for (uint i = 0; i < n; i++)
137 matrix[i][0] = i;
138
139 for (uint i = 0; i < m; i++)
140 matrix[0][i] = i;
141
142 uint min;
143 for (uint i = 1; i < n; i++) {
144 for (uint j = 1; j < m; j++) {
145 uint deleteChar = matrix[i-1][j] + 1;
146 uint insertChar = matrix[i][j-1] + 1;
147
148 if (deleteChar < insertChar)
149 min = deleteChar;
150 else
151 min = insertChar;
152
153 if (s1[i-1] == s2[j-1]) {
154 uint inheritChar = matrix[i-1][j-1];
155 if (inheritChar < min)
156 min = inheritChar;
157 }
158
159 matrix[i][j] = min;
160 }
161 }
162 return matrix[n-1][m-1];
163}
164
165
166QString secondsToString(int timeInSeconds)
167{
168 QList<QPair<int, QString> > timeUnit;
169 timeUnit.append(qMakePair(365*24*60*60, QCoreApplication::translate("Quassel::secondsToString()", "year")));
170 timeUnit.append(qMakePair(24*60*60, QCoreApplication::translate("Quassel::secondsToString()", "day")));
171 timeUnit.append(qMakePair(60*60, QCoreApplication::translate("Quassel::secondsToString()", "h")));
172 timeUnit.append(qMakePair(60, QCoreApplication::translate("Quassel::secondsToString()", "min")));
173 timeUnit.append(qMakePair(1, QCoreApplication::translate("Quassel::secondsToString()", "sec")));
174
175 QStringList returnString;
176 for (int i = 0; i < timeUnit.size(); i++) {
177 int n = timeInSeconds / timeUnit[i].first;
178 if (n > 0) {
179 returnString += QString("%1 %2").arg(QString::number(n), timeUnit[i].second);
180 }
181 timeInSeconds = timeInSeconds % timeUnit[i].first;
182 }
183 return returnString.join(", ");
184}
185
186
187QByteArray prettyDigest(const QByteArray &digest)
188{
189 QByteArray hexDigest = digest.toHex().toUpper();
190 QByteArray prettyDigest;
191 prettyDigest.fill(':', hexDigest.count() + (hexDigest.count() / 2) - 1);
192
193 for (int i = 0; i * 2 < hexDigest.count(); i++) {
194 prettyDigest.replace(i * 3, 2, hexDigest.mid(i * 2, 2));
195 }
196 return prettyDigest;
197}
198