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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:24:15 -0500
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:24:15 -0500
commitbd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch)
tree7a520322212d48ebcb9fbe1087e7fca28b76185c /src/tools/qstringlist.cpp
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+/****************************************************************************
+**
+** Implementation of QStringList
+**
+** Created : 990406
+**
+** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
+**
+** This file is part of the tools module of the Qt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free Qt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing requirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at sales@trolltech.com.
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.QPL
+** included in the packaging of this file. Licensees holding valid Qt
+** Commercial licenses may use this file in accordance with the Qt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#include "qstringlist.h"
+
+#ifndef QT_NO_STRINGLIST
+#include "qregexp.h"
+#include "qstrlist.h"
+#include "qdatastream.h"
+#include "qtl.h"
+
+/*!
+ \class QStringList qstringlist.h
+ \reentrant
+ \brief The QStringList class provides a list of strings.
+
+ \ingroup tools
+ \ingroup shared
+ \ingroup text
+ \mainclass
+
+ It is used to store and manipulate strings that logically belong
+ together. Essentially QStringList is a QValueList of QString
+ objects. Unlike QStrList, which stores pointers to characters,
+ QStringList holds real QString objects. It is the class of choice
+ whenever you work with Unicode strings. QStringList is part of the
+ \link qtl.html Qt Template Library\endlink.
+
+ Like QString itself, QStringList objects are implicitly shared, so
+ passing them around as value-parameters is both fast and safe.
+
+ Strings can be added to a list using append(), operator+=() or
+ operator<<(), e.g.
+ \code
+ QStringList fonts;
+ fonts.append( "Times" );
+ fonts += "Courier";
+ fonts += "Courier New";
+ fonts << "Helvetica [Cronyx]" << "Helvetica [Adobe]";
+ \endcode
+
+ String lists have an iterator, QStringList::Iterator(), e.g.
+ \code
+ for ( QStringList::Iterator it = fonts.begin(); it != fonts.end(); ++it ) {
+ cout << *it << ":";
+ }
+ cout << endl;
+ // Output:
+ // Times:Courier:Courier New:Helvetica [Cronyx]:Helvetica [Adobe]:
+ \endcode
+
+ Many Qt functions return string lists by value; to iterate over
+ these you should make a copy and iterate over the copy.
+
+ You can concatenate all the strings in a string list into a single
+ string (with an optional separator) using join(), e.g.
+ \code
+ QString allFonts = fonts.join( ", " );
+ cout << allFonts << endl;
+ // Output:
+ // Times, Courier, Courier New, Helvetica [Cronyx], Helvetica [Adobe]
+ \endcode
+
+ You can sort the list with sort(), and extract a new list which
+ contains only those strings which contain a particular substring
+ (or match a particular regular expression) using the grep()
+ functions, e.g.
+ \code
+ fonts.sort();
+ cout << fonts.join( ", " ) << endl;
+ // Output:
+ // Courier, Courier New, Helvetica [Adobe], Helvetica [Cronyx], Times
+
+ QStringList helveticas = fonts.grep( "Helvetica" );
+ cout << helveticas.join( ", " ) << endl;
+ // Output:
+ // Helvetica [Adobe], Helvetica [Cronyx]
+ \endcode
+
+ Existing strings can be split into string lists with character,
+ string or regular expression separators, e.g.
+ \code
+ QString s = "Red\tGreen\tBlue";
+ QStringList colors = QStringList::split( "\t", s );
+ cout << colors.join( ", " ) << endl;
+ // Output:
+ // Red, Green, Blue
+ \endcode
+*/
+
+/*!
+ \fn QStringList::QStringList()
+
+ Creates an empty string list.
+*/
+
+/*!
+ \fn QStringList::QStringList( const QStringList& l )
+
+ Creates a copy of the list \a l. This function is very fast
+ because QStringList is implicitly shared. In most situations this
+ acts like a deep copy, for example, if this list or the original
+ one or some other list referencing the same shared data is
+ modified, the modifying list first makes a copy, i.e.
+ copy-on-write.
+ In a threaded environment you may require a real deep copy
+ \omit see \l QDeepCopy\endomit.
+*/
+
+/*!
+ \fn QStringList::QStringList (const QString & i)
+
+ Constructs a string list consisting of the single string \a i.
+ Longer lists are easily created as follows:
+
+ \code
+ QStringList items;
+ items << "Buy" << "Sell" << "Update" << "Value";
+ \endcode
+*/
+
+/*!
+ \fn QStringList::QStringList (const char* i)
+
+ Constructs a string list consisting of the single Latin-1 string \a i.
+*/
+
+/*!
+ \fn QStringList::QStringList( const QValueList<QString>& l )
+
+ Constructs a new string list that is a copy of \a l.
+*/
+
+/*!
+ Sorts the list of strings in ascending case-sensitive order.
+
+ Sorting is very fast. It uses the \link qtl.html Qt Template
+ Library's\endlink efficient HeapSort implementation that has a
+ time complexity of O(n*log n).
+
+ If you want to sort your strings in an arbitrary order consider
+ using a QMap. For example you could use a QMap\<QString,QString\>
+ to create a case-insensitive ordering (e.g. mapping the lowercase
+ text to the text), or a QMap\<int,QString\> to sort the strings by
+ some integer index, etc.
+*/
+void QStringList::sort()
+{
+ qHeapSort( *this );
+}
+
+/*!
+ \overload
+
+ This version of the function uses a QChar as separator, rather
+ than a regular expression.
+
+ \sa join() QString::section()
+*/
+
+QStringList QStringList::split( const QChar &sep, const QString &str,
+ bool allowEmptyEntries )
+{
+ return split( QString(sep), str, allowEmptyEntries );
+}
+
+/*!
+ \overload
+
+ This version of the function uses a QString as separator, rather
+ than a regular expression.
+
+ If \a sep is an empty string, the return value is a list of
+ one-character strings: split( QString( "" ), "four" ) returns the
+ four-item list, "f", "o", "u", "r".
+
+ If \a allowEmptyEntries is TRUE, a null string is inserted in
+ the list wherever the separator matches twice without intervening
+ text.
+
+ \sa join() QString::section()
+*/
+
+QStringList QStringList::split( const QString &sep, const QString &str,
+ bool allowEmptyEntries )
+{
+ QStringList lst;
+
+ int j = 0;
+ int i = str.find( sep, j );
+
+ while ( i != -1 ) {
+ if ( i > j && i <= (int)str.length() )
+ lst << str.mid( j, i - j );
+ else if ( allowEmptyEntries )
+ lst << QString::null;
+ j = i + sep.length();
+ i = str.find( sep, sep.length() > 0 ? j : j+1 );
+ }
+
+ int l = str.length() - 1;
+ if ( str.mid( j, l - j + 1 ).length() > 0 )
+ lst << str.mid( j, l - j + 1 );
+ else if ( allowEmptyEntries )
+ lst << QString::null;
+
+ return lst;
+}
+
+#ifndef QT_NO_REGEXP
+/*!
+ Splits the string \a str into strings wherever the regular
+ expression \a sep occurs, and returns the list of those strings.
+
+ If \a allowEmptyEntries is TRUE, a null string is inserted in
+ the list wherever the separator matches twice without intervening
+ text.
+
+ For example, if you split the string "a,,b,c" on commas, split()
+ returns the three-item list "a", "b", "c" if \a allowEmptyEntries
+ is FALSE (the default), and the four-item list "a", "", "b", "c"
+ if \a allowEmptyEntries is TRUE.
+
+ If \a sep does not match anywhere in \a str, split() returns a
+ single element list with the element containing the single string
+ \a str.
+
+ \sa join() QString::section()
+*/
+
+QStringList QStringList::split( const QRegExp &sep, const QString &str,
+ bool allowEmptyEntries )
+{
+ QStringList lst;
+
+ QRegExp tep = sep;
+
+ int j = 0;
+ int i = tep.search( str, j );
+
+ while ( i != -1 ) {
+ if ( str.mid( j, i - j ).length() > 0 )
+ lst << str.mid( j, i - j );
+ else if ( allowEmptyEntries )
+ lst << QString::null;
+ if ( tep.matchedLength() == 0 )
+ j = i + 1;
+ else
+ j = i + tep.matchedLength();
+ i = tep.search( str, j );
+ }
+
+ int l = str.length() - 1;
+ if ( str.mid( j, l - j + 1 ).length() > 0 )
+ lst << str.mid( j, l - j + 1 );
+ else if ( allowEmptyEntries )
+ lst << QString::null;
+
+ return lst;
+}
+#endif
+
+/*!
+ Returns a list of all the strings containing the substring \a str.
+
+ If \a cs is TRUE, the grep is done case-sensitively; otherwise
+ case is ignored.
+
+ \code
+ QStringList list;
+ list << "Bill Gates" << "John Doe" << "Bill Clinton";
+ list = list.grep( "Bill" );
+ // list == ["Bill Gates", "Bill Clinton"]
+ \endcode
+
+ \sa QString::find()
+*/
+
+QStringList QStringList::grep( const QString &str, bool cs ) const
+{
+ QStringList res;
+ for ( QStringList::ConstIterator it = begin(); it != end(); ++it )
+ if ( (*it).contains(str, cs) )
+ res << *it;
+
+ return res;
+}
+
+#ifndef QT_NO_REGEXP
+/*!
+ \overload
+
+ Returns a list of all the strings that match the regular
+ expression \a rx.
+
+ \sa QString::find()
+*/
+
+QStringList QStringList::grep( const QRegExp &rx ) const
+{
+ QStringList res;
+ for ( QStringList::ConstIterator it = begin(); it != end(); ++it )
+ if ( (*it).find(rx) != -1 )
+ res << *it;
+
+ return res;
+}
+#endif
+
+/*!
+ Replaces every occurrence of the string \a before in the strings
+ that constitute the string list with the string \a after. Returns
+ a reference to the string list.
+
+ If \a cs is TRUE, the search is case sensitive; otherwise the
+ search is case insensitive.
+
+ Example:
+ \code
+ QStringList list;
+ list << "alpha" << "beta" << "gamma" << "epsilon";
+ list.gres( "a", "o" );
+ // list == ["olpho", "beto", "gommo", "epsilon"]
+ \endcode
+
+ \sa QString::replace()
+*/
+QStringList& QStringList::gres( const QString &before, const QString &after,
+ bool cs )
+{
+ QStringList::Iterator it = begin();
+ while ( it != end() ) {
+ (*it).replace( before, after, cs );
+ ++it;
+ }
+ return *this;
+}
+
+#ifndef QT_NO_REGEXP_CAPTURE
+/*!
+ \overload
+
+ Replaces every occurrence of the regexp \a rx in the string
+ with \a after. Returns a reference to the string list.
+
+ Example:
+ \code
+ QStringList list;
+ list << "alpha" << "beta" << "gamma" << "epsilon";
+ list.gres( QRegExp("^a"), "o" );
+ // list == ["olpha", "beta", "gamma", "epsilon"]
+ \endcode
+
+ For regexps containing \link qregexp.html#capturing-text
+ capturing parentheses \endlink, occurrences of <b>\\1</b>,
+ <b>\\2</b>, ..., in \a after are replaced with \a{rx}.cap(1),
+ cap(2), ...
+
+ Example:
+ \code
+ QStringList list;
+ list << "Bill Clinton" << "Gates, Bill";
+ list.gres( QRegExp("^(.*), (.*)$"), "\\2 \\1" );
+ // list == ["Bill Clinton", "Bill Gates"]
+ \endcode
+
+ \sa QString::replace()
+*/
+QStringList& QStringList::gres( const QRegExp &rx, const QString &after )
+{
+ QStringList::Iterator it = begin();
+ while ( it != end() ) {
+ (*it).replace( rx, after );
+ ++it;
+ }
+ return *this;
+}
+
+#endif
+
+/*!
+ Joins the string list into a single string with each element
+ separated by the string \a sep (which can be empty).
+
+ \sa split()
+*/
+QString QStringList::join( const QString &sep ) const
+{
+ QString res;
+ bool alredy = FALSE;
+ for ( QStringList::ConstIterator it = begin(); it != end(); ++it ) {
+ if ( alredy )
+ res += sep;
+ alredy = TRUE;
+ res += *it;
+ }
+
+ return res;
+}
+
+#ifndef QT_NO_DATASTREAM
+Q_EXPORT QDataStream &operator>>( QDataStream & s, QStringList& l )
+{
+ return s >> (QValueList<QString>&)l;
+}
+
+Q_EXPORT QDataStream &operator<<( QDataStream & s, const QStringList& l )
+{
+ return s << (const QValueList<QString>&)l;
+}
+#endif
+
+/*!
+ Converts from an ASCII-QStrList \a ascii to a QStringList (Unicode).
+*/
+QStringList QStringList::fromStrList(const QStrList& ascii)
+{
+ QStringList res;
+ const char * s;
+ for ( QStrListIterator it(ascii); (s=it.current()); ++it )
+ res << s;
+ return res;
+}
+
+/*! \fn void QStringList::detach()
+ \reimp
+*/
+
+
+#endif //QT_NO_STRINGLIST