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/***************************************************************************
* Copyright (C) 2005-2013 by the Quassel Project *
* devel@quassel-irc.org *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) version 3. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include "util.h"
#include <QCoreApplication>
#include <QDebug>
#include <QFile>
#include <QTextCodec>
#include "quassel.h"
class QMetaMethod;
// MIBenum values from http://www.iana.org/assignments/character-sets/character-sets.xml#table-character-sets-1
static QList<int> utf8DetectionBlacklist = QList<int>()
<< 39 /* ISO-2022-JP */;
QString nickFromMask(QString mask)
{
return mask.section('!', 0, 0);
}
QString userFromMask(QString mask)
{
QString userhost = mask.section('!', 1);
if (userhost.isEmpty()) return QString();
return userhost.section('@', 0, 0);
}
QString hostFromMask(QString mask)
{
QString userhost = mask.section('!', 1);
if (userhost.isEmpty()) return QString();
return userhost.section('@', 1);
}
bool isChannelName(QString str)
{
return QString("#&!+").contains(str[0]);
}
QString stripFormatCodes(QString str)
{
str.remove(QRegExp("\x03(\\d\\d?(,\\d\\d?)?)?"));
str.remove('\x02');
str.remove('\x0f');
str.remove('\x12');
str.remove('\x16');
str.remove('\x1d');
str.remove('\x1f');
return str;
}
QString stripAcceleratorMarkers(const QString &label_)
{
QString label = label_;
int p = 0;
forever {
p = label.indexOf('&', p);
if (p < 0 || p + 1 >= label.length())
break;
if (label.at(p + 1).isLetterOrNumber() || label.at(p + 1) == '&')
label.remove(p, 1);
++p;
}
return label;
}
QString decodeString(const QByteArray &input, QTextCodec *codec)
{
if (codec && utf8DetectionBlacklist.contains(codec->mibEnum()))
return codec->toUnicode(input);
// First, we check if it's utf8. It is very improbable to encounter a string that looks like
// valid utf8, but in fact is not. This means that if the input string passes as valid utf8, it
// is safe to assume that it is.
// Q_ASSERT(sizeof(const char) == sizeof(quint8)); // In God we trust...
bool isUtf8 = true;
int cnt = 0;
for (int i = 0; i < input.size(); i++) {
if (cnt) {
// We check a part of a multibyte char. These need to be of the form 10yyyyyy.
if ((input[i] & 0xc0) != 0x80) { isUtf8 = false; break; }
cnt--;
continue;
}
if ((input[i] & 0x80) == 0x00) continue; // 7 bit is always ok
if ((input[i] & 0xf8) == 0xf0) { cnt = 3; continue; } // 4-byte char 11110xxx 10yyyyyy 10zzzzzz 10vvvvvv
if ((input[i] & 0xf0) == 0xe0) { cnt = 2; continue; } // 3-byte char 1110xxxx 10yyyyyy 10zzzzzz
if ((input[i] & 0xe0) == 0xc0) { cnt = 1; continue; } // 2-byte char 110xxxxx 10yyyyyy
isUtf8 = false; break; // 8 bit char, but not utf8!
}
if (isUtf8 && cnt == 0) {
QString s = QString::fromUtf8(input);
//qDebug() << "Detected utf8:" << s;
return s;
}
//QTextCodec *codec = QTextCodec::codecForName(encoding.toAscii());
if (!codec) return QString::fromAscii(input);
return codec->toUnicode(input);
}
uint editingDistance(const QString &s1, const QString &s2)
{
uint n = s1.size()+1;
uint m = s2.size()+1;
QVector<QVector<uint> > matrix(n, QVector<uint>(m, 0));
for (uint i = 0; i < n; i++)
matrix[i][0] = i;
for (uint i = 0; i < m; i++)
matrix[0][i] = i;
uint min;
for (uint i = 1; i < n; i++) {
for (uint j = 1; j < m; j++) {
uint deleteChar = matrix[i-1][j] + 1;
uint insertChar = matrix[i][j-1] + 1;
if (deleteChar < insertChar)
min = deleteChar;
else
min = insertChar;
if (s1[i-1] == s2[j-1]) {
uint inheritChar = matrix[i-1][j-1];
if (inheritChar < min)
min = inheritChar;
}
matrix[i][j] = min;
}
}
return matrix[n-1][m-1];
}
QString secondsToString(int timeInSeconds)
{
QList<QPair<int, QString> > timeUnit;
timeUnit.append(qMakePair(365*24*60*60, QCoreApplication::translate("Quassel::secondsToString()", "year")));
timeUnit.append(qMakePair(24*60*60, QCoreApplication::translate("Quassel::secondsToString()", "day")));
timeUnit.append(qMakePair(60*60, QCoreApplication::translate("Quassel::secondsToString()", "h")));
timeUnit.append(qMakePair(60, QCoreApplication::translate("Quassel::secondsToString()", "min")));
timeUnit.append(qMakePair(1, QCoreApplication::translate("Quassel::secondsToString()", "sec")));
QStringList returnString;
for (int i = 0; i < timeUnit.size(); i++) {
int n = timeInSeconds / timeUnit[i].first;
if (n > 0) {
returnString += QString("%1 %2").arg(QString::number(n), timeUnit[i].second);
}
timeInSeconds = timeInSeconds % timeUnit[i].first;
}
return returnString.join(", ");
}
QByteArray prettyDigest(const QByteArray &digest)
{
QByteArray hexDigest = digest.toHex().toUpper();
QByteArray prettyDigest;
prettyDigest.fill(':', hexDigest.count() + (hexDigest.count() / 2) - 1);
for (int i = 0; i * 2 < hexDigest.count(); i++) {
prettyDigest.replace(i * 3, 2, hexDigest.mid(i * 2, 2));
}
return prettyDigest;
}
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