Qt 4.2 User's Guide: QByteArray Class Reference

QByteArray can be used to store both raw bytes (including '\0's) and traditional 8-bit '\0'-terminated strings. Using QByteArray is much more convenient than using {const char *}. Behind the scenes, it always ensures that the data is followed by a '\0' terminator, and uses {implicit sharing} (copy-on-write) to reduce memory usage and avoid needless copying of data.

In addition to QByteArray, Qt also provides the QString class to store string data. For most purposes, QString is the class you want to use. It stores 16-bit Unicode characters, making it easy to store non-ASCII/non-Latin-1 characters in your application. Furthermore, QString is used throughout in the Qt API. The two main cases where QByteArray is appropriate are when you need to store raw binary data, and when memory conservation is critical (e.g. with Qtopia Core).

One way to initialize a QByteArray is simply to pass a {const char *} to its constructor. For example, the following code creates a byte array of size 5 containing the data "Hello":

Although the size() is 5, the byte array also maintains an extra '\0' character at the end so that if a function is used that asks for a pointer to the underlying data (e.g. a call to data()), the data pointed to is guaranteed to be '\0'-terminated.

QByteArray makes a deep copy of the {const char *} data, so you can modify it later without experiencing side effects. (If for performance reasons you don't want to take a deep copy of the character data, use QByteArray::fromRawData() instead.)

Another approach is to set the size of the array using resize() and to initialize the data byte per byte. QByteArray uses 0-based indexes, just like C++ arrays. To access the byte at a particular index position, you can use operator[](). On non-const byte arrays, operator[]() returns a reference to a byte that can be used on the left side of an assignment. For example:

at() can be faster than operator[](), because it never causes a {deep copy} to occur.

A QByteArray can embed '\0' bytes. The size() function always returns the size of the whole array, including embedded '\0' bytes. If you want to obtain the length of the data up to and excluding the first '\0' character, call qstrlen() on the byte array.

After a call to resize(), newly allocated bytes have undefined values. To set all the bytes to a particular value, call fill().

To obtain a pointer to the actual character data, call data() or constData(). These functions return a pointer to the beginning of the data. The pointer is guaranteed to remain valid until a non-const function is called on the QByteArray. It is also guaranteed that the data ends with a '\0' byte. This '\0' byte is automatically provided by QByteArray and is not counted in size().

The replace() and remove() functions' first two arguments are the position from which to start erasing and the number of bytes that should be erased.

If you are building a QByteArray gradually and know in advance approximately how many bytes the QByteArray will contain, you can call reserve(), asking QByteArray to preallocate a certain amount of memory. You can also call capacity() to find out how much memory QByteArray actually allocated.

A frequent requirement is to remove whitespace characters from a byte array ('\n', '\t', ' ', etc.). If you want to remove whitespace from both ends of a QByteArray, use trimmed(). If you want to remove whitespace from both ends and replace multiple consecutive whitespaces with a single space character within the byte array, use simplified().

If you want to find all occurrences of a particular character or substring in a QByteArray, use indexOf() or lastIndexOf(). The former searches forward starting from a given index position, the latter searches backward. Both return the index position of the character or substring if they find it; otherwise, they return -1. For example, here's a typical loop that finds all occurrences of a particular substring:

If you simply want to check whether a QByteArray contains a particular character or substring, use contains(). If you want to find out how many times a particular character or substring occurs in the byte array, use count(). If you want to replace all occurrences of a particular value with another, use one of the two-parameter replace() overloads.

QByteArrays can be compared using overloaded operators such as operator<(), operator<=(), operator==(), operator>=(), and so on. The comparison is based exclusively on the numeric values of the characters and is very fast, but is not what a human would expect. QString::localeAwareCompare() is a better choice for sorting user-interface strings.

For historical reasons, QByteArray distinguishes between a null byte array and an empty byte array. A null byte array is a byte array that is initialized using QByteArray's default constructor or by passing (const char *)0 to the constructor. An empty byte array is any byte array with size 0. A null byte array is always empty, but an empty byte array isn't necessarily null:

All functions except isNull() treat null byte arrays the same as empty byte arrays. For example, data() returns a pointer to a '\0' character for a null byte array (not a null pointer), and QByteArray() compares equal to QByteArray(""). We recommend that you always use isEmpty() and avoid isNull().

Member Typedef Documentation

QByteArray::iterator

Definition at line 255 of file qbytearray.h.

QByteArray::const_iterator

Definition at line 256 of file qbytearray.h.

QByteArray::Iterator

Definition at line 257 of file qbytearray.h.

QByteArray::ConstIterator

Definition at line 258 of file qbytearray.h.

QByteArray::const_reference

Definition at line 267 of file qbytearray.h.

QByteArray::reference

Definition at line 268 of file qbytearray.h.

Constructor & Destructor Documentation

QByteArray::QByteArray ( ) [inline]

Constructs an empty byte array.

See also:: isEmpty()

Definition at line 324 of file qbytearray.h.

References d, QByteArray::Data::ref, and QBasicAtomic::ref().

Referenced by fromRawData(), left(), mid(), operator+(), right(), and trimmed().

00324 : d(&shared_null) { d->ref.ref(); }

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QByteArray::QByteArray ( const char * str )

Constructs a byte array initialized with the string str.

QByteArray makes a deep copy of the string data.

Definition at line 1201 of file qbytearray.cpp.

References QByteArray::Data::alloc, QByteArray::Data::array, d, QByteArray::Data::data, QBasicAtomic::init(), len, qMalloc(), qstrlen(), QByteArray::Data::ref, QBasicAtomic::ref(), shared_empty, shared_null, and QByteArray::Data::size.

01202 {
01203     if (!str) {
01204         d = &shared_null;
01205     } else if (!*str) {
01206         d = &shared_empty;
01207     } else {
01208         int len = qstrlen(str);
01209         d = static_cast<Data *>(qMalloc(sizeof(Data)+len));
01210         if (!d) {
01211             d = &shared_null;
01212         } else {
01213             d->ref.init(0);
01214             d->alloc = d->size = len;
01215             d->data = d->array;
01216             memcpy(d->array, str, len+1); // include null terminator
01217         }
01218     }
01219     d->ref.ref();
01220 }

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QByteArray::QByteArray	(	const char *	data,
		int	size
	)

Constructs a byte array containing the first size bytes of array data.

If data is 0, a null byte array is constructed.

QByteArray makes a deep copy of the string data.

See also:: fromRawData()

Definition at line 1233 of file qbytearray.cpp.

References QByteArray::Data::alloc, QByteArray::Data::array, d, QByteArray::Data::data, QBasicAtomic::init(), qMalloc(), QByteArray::Data::ref, QBasicAtomic::ref(), shared_empty, shared_null, and QByteArray::Data::size.

01234 {
01235     if (!data) {
01236         d = &shared_null;
01237     } else if (size <= 0) {
01238         d = &shared_empty;
01239     } else {
01240         d = static_cast<Data *>(qMalloc(sizeof(Data) + size));
01241         if (!d) {
01242             d = &shared_null;
01243         } else {
01244             d->ref.init(0);
01245             d->alloc = d->size = size;
01246             d->data = d->array;
01247             memcpy(d->array, data, size);
01248             d->array[size] = '\0';
01249         }
01250     }
01251     d->ref.ref();
01252 }

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QByteArray::QByteArray	(	int	size,
		char	ch
	)

Constructs a byte array of size size with every byte set to character ch.

See also:: fill()

Definition at line 1261 of file qbytearray.cpp.

01262 {
01263     if (size <= 0) {
01264         d = &shared_null;
01265     } else {
01266         d = static_cast<Data *>(qMalloc(sizeof(Data)+size));
01267         if (!d) {
01268             d = &shared_null;
01269         } else {
01270             d->ref.init(0);
01271             d->alloc = d->size = size;
01272             d->data = d->array;
01273             d->array[size] = '\0';
01274             memset(d->array, ch, size);
01275         }
01276     }
01277     d->ref.ref();
01278 }

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QByteArray::QByteArray ( const QByteArray & other ) [inline]

Constructs a copy of other.

This operation takes {constant time}, because QByteArray is {implicitly shared}. This makes returning a QByteArray from a function very fast. If a shared instance is modified, it will be copied (copy-on-write), and that takes {linear time}.

See also:: operator=()

Definition at line 350 of file qbytearray.h.

References d, QByteArray::Data::ref, and QBasicAtomic::ref().

00350                                                  : d(a.d)
00351 { d->ref.ref(); }

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QByteArray::~QByteArray ( ) [inline]

Destroys the byte array.

Definition at line 325 of file qbytearray.h.

References d, QBasicAtomic::deref(), qFree(), and QByteArray::Data::ref.

00325 { if (!d->ref.deref()) qFree(d); }

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QByteArray::QByteArray	(	Data *	dd,
		int	,
		int
	)			`[inline, private]`

Definition at line 316 of file qbytearray.h.

00316 : d(dd) {}

Member Function Documentation

QByteArray & QByteArray::operator= ( const QByteArray & other )

Assigns other to this byte array and returns a reference to this byte array.

Definition at line 787 of file qbytearray.cpp.

References d, qAtomicSetPtr(), qFree(), and x.

Referenced by Q3CString::operator=().

00788 {
00789     Data *x = other.d;
00790     x->ref.ref();
00791     x = qAtomicSetPtr(&d, x);
00792     if (!x->ref.deref())
00793         qFree(x);
00794     return *this;
00795 }

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QByteArray & QByteArray::operator= ( const char * str )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Assigns str to this byte array.

Definition at line 804 of file qbytearray.cpp.

References QByteArray::Data::alloc, d, len, qAtomicSetPtr(), qFree(), qstrlen(), realloc(), QByteArray::Data::ref, shared_empty, shared_null, size(), and x.

00805 {
00806     Data *x;
00807     if (!str) {
00808         x = &shared_null;
00809     } else if (!*str) {
00810         x = &shared_empty;
00811     } else {
00812         int len = qstrlen(str);
00813         if (d->ref != 1 || len > d->alloc || (len < d->size && len < d->alloc >> 1))
00814             realloc(len);
00815         x = d;
00816         memcpy(x->data, str, len + 1); // include null terminator
00817         x->size = len;
00818     }
00819     x->ref.ref();
00820     x = qAtomicSetPtr(&d, x);
00821     if (!x->ref.deref())
00822          qFree(x);
00823     return *this;
00824 }

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int QByteArray::size ( ) const [inline]

Returns the number of bytes in this byte array.

The last byte in the byte array is at position size() - 1. In addition, QByteArray ensures that the byte at position size() is always '\0', so that you can use the return value of data() and constData() as arguments to functions that expect '\0'-terminated strings.

Example:

        QByteArray ba("Hello");
        int n = ba.size();          // n == 5
        ba.data()[0];               // returns 'H'
        ba.data()[4];               // returns 'o'
        ba.data()[5];               // returns '\0'

See also:: isEmpty(), resize()

Definition at line 326 of file qbytearray.h.

References d, and QByteArray::Data::size.

Referenced by QHttpPrivate::_q_slotConnected(), QHttpPrivate::_q_slotReadyRead(), QSocks5SocketEnginePrivate::_q_udpSocketReadNotification(), SaveFormAsTemplate::accept(), CPP::WriteIconData::acceptImage(), Q3Membuf::append(), QPdf::ascii85Encode(), at(), QSocks5PasswordAuthenticator::beginAuthenticate(), Sender::broadcastDatagram(), QSimpleTextCodec::buildReverseMap(), PeerWireClient::bytesAvailable(), QFtpDTP::bytesAvailable(), checksum(), cleaned(), QTextCodec::codecForHtml(), codecForHTML(), composePreprocessorOutput(), QSimpleTextCodec::convertFromUnicode(), Q3UrlOperator::copyGotData(), create_wm_client_leader(), Q3TextDrag::decode(), Q3IconDragPrivate::decode(), Q3UriDrag::decode(), ScopedTokenReplacement::doReplace(), QPSPrintEnginePrivate::drawImage(), embedData(), QPdfEnginePrivate::embedFont(), encodeEntity(), QClipboard::event(), QODBCResult::exec(), QIBaseResultPrivate::fetchBlob(), QClipboardWatcher::formats_sys(), QSqlDriver::formatValue(), QMYSQLDriver::formatValue(), fromBase64(), QUrl::fromPercentEncoding(), QUrl::fromPunycode(), Moc::generate(), generateGlyphTables(), Generator::generateSignal(), BencodeParser::getByteString(), BencodeParser::getDictionary(), BencodeParser::getInteger(), BencodeParser::getList(), getToken(), TrackerClient::httpRequestDone(), QGifHandler::imageIsComing(), QByteArrayMatcher::indexIn(), indexOf(), QSettingsPrivate::iniEscapedString(), MainWindow::loadLayout(), main(), normalizeTypeInternal(), Q3LocalFs::operationPut(), QBitArray::operator &=(), operator+(), operator<(), operator<<(), operator<=(), operator=(), operator==(), operator>(), operator>=(), operator[](), QBitArray::operator^=(), QBitArray::operator|=(), QBitArray::operator~(), MetaInfo::parse(), QSocks5SocketEnginePrivate::parseNewConnection(), QSocks5SocketEnginePrivate::parseRequestMethodReply(), Moc::parseType(), QRingBuffer::peek(), QIODevice::peek(), Connection::processData(), PeerWireClient::processIncomingData(), Receiver::processPendingDatagrams(), Connection::processReadyRead(), Q3DnsAnswer::Q3DnsAnswer(), QBitArray::QBitArray(), qbytearray_insert(), qGetBinaryData(), qt_x11_apply_settings_in_all_apps(), qtMD5(), qUncompress(), QFtpDTP::read(), QRingBuffer::read(), QGifHandler::read(), read_xpm_body(), read_xpm_string(), Q3FtpDTP::readAll(), QIODevice::readAll(), QFtpDTP::readAll(), PeerManager::readBroadcastDatagram(), PeerWireClient::readData(), QSocks5SocketEngine::readDatagram(), Connection::readDataIntoBuffer(), PeerWireClient::readFromSocket(), QConfFileSettingsPrivate::readIniFile(), QIODevice::readLine(), replace(), QBitArray::resize(), QInternalMimeData::retrieveData(), QClipboardWatcher::retrieveData_sys(), runlengthEncode(), Translator::save(), QAbstractFormBuilder::save(), MainWindow::saveLayout(), Server::sendFortune(), Connection::sendGreetingMessage(), Connection::sendMessage(), PeerWireClient::sendPieceList(), QByteArrayMatcher::setPattern(), TorrentClient::setTorrent(), Q3UriDrag::setUris(), Q3Http::slotConnected(), Q3Http::slotReadyRead(), QFtpDTP::socketReadyRead(), Q3FtpDTP::socketReadyRead(), Q3Process::socketWrite(), Q3CString::sprintf(), Q3HttpNormalRequest::start(), SubArray::SubArray(), Symbol::Symbol(), toBase64(), QUrl::toPercentEncoding(), QUrl::toPunycode(), QKeyMapperPrivate::translateKeyEventInternal(), translateKeySym(), truncate(), FileManager::verifySinglePiece(), QSocks5SocketEngine::write(), QIBaseResultPrivate::writeBlob(), PeerWireClient::writeData(), QSocks5SocketEngine::writeDatagram(), FileWriter::writeFile(), QDesignerActions::writeOutForm(), PeerWireClient::writeToSocket(), QClipboardINCRTransaction::x11Event(), QXIMInputContext::x11FilterEvent(), QX11Data::xdndMimeDataForAtom(), and xdndObtainData().

00327 { return d->size; }

bool QByteArray::isEmpty ( ) const [inline]

Returns true if the byte array has size 0; otherwise returns false.

Example:

        QByteArray().isEmpty();         // returns true
        QByteArray("").isEmpty();       // returns true
        QByteArray("abc").isEmpty();    // returns false

See also:: size()

Definition at line 334 of file qbytearray.h.

References d, and QByteArray::Data::size.

Referenced by QFontDatabasePrivate::addAppFont(), QPdfEnginePrivate::addBrushPattern(), QUrl::addQueryItem(), PeerWireClient::canTransferMore(), checkSymbolFont(), QTextCodec::codecForName(), create_wm_client_leader(), createReadHandler(), QDBusArgumentPrivate::createSignature(), ProReader::currentBlock(), data(), Q3MimeSourceFactory::dataInternal(), Q3ImageDrag::decode(), ScopedTokenReplacement::doReplace(), QPdfBaseEnginePrivate::drawTextItem(), PreprocessReplace::evaluateIncludeDirective(), IncludeDirectiveAnalyzer::evaluateIncludeDirective(), TrackerClient::fetchPeerList(), QualifiedNameParser::findScopeOperator(), QPSPrintEnginePrivate::flushPage(), fontFile(), QImageReader::format(), Generator::generateCode(), generateInterfaceXml(), Generator::generateMetacall(), Generator::generateSignal(), QFreetypeFace::getFace(), getLprPrinters(), QGifHandler::imageIsComing(), QTest::incidentType2String(), ProReader::insertComment(), ProReader::insertVariable(), QUrl::isEmpty(), Translator::isEmpty(), ReplaceToken::isInterestingToken(), HelpWindow::isKDERunning(), QSignalSpy::isValid(), QDBusUtil::isValidMemberName(), listInterface(), main(), QTest::messageType2String(), QX11Data::motifdndObtainData(), QPpmHandler::name(), QualifiedNameParser::nextScopeToken(), operator!=(), TranslatorMessage::operator==(), operator==(), BencodeParser::parse(), QUrlPrivate::parse(), Moc::parseFunction(), Semantic::parseFunctionDeclaration(), Moc::parseMaybeFunction(), QDBusMetaObjectGenerator::parseMethods(), QDBusMetaObjectGenerator::parseSignals(), Q3TextEdit::pasteSpecial(), PeerManager::PeerManager(), Preprocessor::preprocess(), Preprocessor::preprocessed(), PeerWireClient::processIncomingData(), Q_GLOBAL_STATIC_WITH_ARGS(), QDBusConnectionPrivate::QDBusConnectionPrivate(), qmake_mkspec_paths(), QUrl::queryItems(), QPictureIO::read(), QGifHandler::read(), read_xpm_body(), read_xpm_string(), registerFont(), MetaTranslator::release(), QInternalMimeData::renderDataHelper(), Parser::reportError(), QMainWindow::restoreState(), QInternalMimeData::retrieveData(), QMimeDataPrivate::retrieveTypedData(), MetaTranslator::save(), Translator::save(), Q3FileDialog::setDir(), QTextHtmlExporter::toHtml(), QUrl::toPercentEncoding(), QFontSubset::toTruetype(), QFontSubset::toType1(), translateKeySym(), Q3TextDeleteCommand::unexecute(), Translator::unsqueeze(), QDesignerLabel::updateBuddy(), ProReader::updateItem(), QMetaEnum::valueToKeys(), QPictureIO::write(), writeAdaptor(), QConfFileSettingsPrivate::writeIniFile(), and PeerWireClient::writeToSocket().

00335 { return d->size == 0; }

void QByteArray::resize ( int size )

Sets the size of the byte array to size bytes.

If size is greater than the current size, the byte array is extended to make it size bytes with the extra bytes added to the end. The new bytes are uninitialized.

If size is less than the current size, bytes are removed from the end.

See also:: size()

Definition at line 1293 of file qbytearray.cpp.

References QByteArray::Data::alloc, QByteArray::Data::array, d, QByteArray::Data::data, qAllocMore(), qAtomicSetPtr(), qFree(), qMalloc(), realloc(), QByteArray::Data::ref, shared_empty, shared_null, QByteArray::Data::size, and x.

01294 {
01295     if (size <= 0) {
01296         Data *x = &shared_empty;
01297         x->ref.ref();
01298         x = qAtomicSetPtr(&d, x);
01299         if (!x->ref.deref())
01300             qFree(x);
01301     } else if ( d == &shared_null ) {
01302         //
01303         // Optimize the idiom:
01304         //    QByteArray a;
01305         //    a.resize(sz);
01306         //    ...
01307         // which is used in place of the Qt 3 idiom:
01308         //    QByteArray a(sz);
01309         //
01310         Data *x = static_cast<Data *>(qMalloc(sizeof(Data)+size));
01311         x->ref.init(1);
01312         x->alloc = x->size = size;
01313         x->data = x->array;
01314         x->array[size] = '\0';
01315         x = qAtomicSetPtr(&d, x);
01316         (void) x->ref.deref(); // cannot be 0, x points to shared_null
01317     } else {
01318         if (d->ref != 1 || size > d->alloc || (size < d->size && size < d->alloc >> 1))
01319             realloc(qAllocMore(size, sizeof(Data)));
01320         if (d->alloc >= size) {
01321             d->size = size;
01322             if (d->data == d->array) {
01323                 d->array[size] = '\0';
01324             }
01325         }
01326     }
01327 }

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QByteArray & QByteArray::fill	(	char	ch,
		int	size = `-1`
	)

Sets every byte in the byte array to character ch. If size is different from -1 (the default), the byte array is resized to size size beforehand.

Example:

        QByteArray ba("Istambul");
        ba.fill("o");
        // ba == "oooooooo"

        ba.fill("X", 2);
        // ba == "XX"

See also:: resize()

Definition at line 1347 of file qbytearray.cpp.

References d, QByteArray::Data::data, resize(), and QByteArray::Data::size.

Referenced by QTest::qSignalDumperCallback(), and QTest::qSignalDumperCallbackSlot().

01348 {
01349     resize(size < 0 ? d->size : size);
01350     if (d->size)
01351         memset(d->data, ch, d->size);
01352     return *this;
01353 }

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int QByteArray::capacity ( ) const [inline]

Returns the maximum number of bytes that can be stored in the byte array without forcing a reallocation.

The sole purpose of this function is to provide a means of fine tuning QByteArray's memory usage. In general, you will rarely ever need to call this function. If you want to know how many bytes are in the byte array, call size().

See also:: reserve(), squeeze()

Definition at line 357 of file qbytearray.h.

References QByteArray::Data::alloc, and d.

00358 { return d->alloc; }

void QByteArray::reserve ( int size ) [inline]

Attempts to allocate memory for at least size bytes. If you know in advance how large the byte array will be, you can call this function, and if you call resize() often you are likely to get better performance. If size is an underestimate, the worst that will happen is that the QByteArray will be a bit slower.

The sole purpose of this function is to provide a means of fine tuning QByteArray's memory usage. In general, you will rarely ever need to call this function. If you want to change the size of the byte array, call resize().

See also:: squeeze(), capacity()

Definition at line 360 of file qbytearray.h.

References QByteArray::Data::alloc, d, realloc(), and QByteArray::Data::ref.

Referenced by _IPv4Address(), cleaned(), QSettingsPrivate::iniEscapedKey(), QSettingsPrivate::iniEscapedString(), QMetaObject::invokeMethod(), QMetaObject::normalizedSignature(), normalizeTypeInternal(), QUrlPrivate::parse(), QDBusMetaObjectGenerator::write(), and QSocks5SocketEngine::writeDatagram().

00361 { if (d->ref != 1 || asize > d->alloc) realloc(asize); }

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void QByteArray::squeeze ( ) [inline]

Releases any memory not required to store the array's data.

The sole purpose of this function is to provide a means of fine tuning QByteArray's memory usage. In general, you will rarely ever need to call this function.

See also:: reserve(), capacity()

Definition at line 363 of file qbytearray.h.

References QByteArray::Data::alloc, d, realloc(), and QByteArray::Data::size.

00364 { if (d->size < d->alloc) realloc(d->size); }

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QByteArray::operator const char * ( ) const [inline]

Returns a pointer to the data stored in the byte array. The pointer can be used to access the bytes that compose the array. The data is '\0'-terminated. The pointer remains valid as long as the array isn't reallocated.

This operator is mostly useful to pass a byte array to a function that accepts a {const char *}.

Note: A QByteArray can store any byte values including '\0's, but most functions that take {char *} arguments assume that the data ends at the first '\0' they encounter.

See also:: constData()

Definition at line 336 of file qbytearray.h.

References d, and QByteArray::Data::data.

00337 { return d->data; }

QByteArray::operator const void * ( ) const [inline]

Returns a void pointer to the data.

This operator is mostly useful to pass a byte array to a function that accepts a void *.

See also:: constData()

Definition at line 338 of file qbytearray.h.

References d, and QByteArray::Data::data.

00339 { return d->data; }

char * QByteArray::data ( ) [inline]

Returns a pointer to the data stored in the byte array. The pointer can be used to access and modify the bytes that compose the array. The data is '\0'-terminated.

Example:

        QByteArray ba("Hello world");
        char *data = ba.data();
        while (*data) {
            cout << "[" << *data << "]" << endl;
            ++data;
        }

The pointer remains valid as long as the byte array isn't reallocated. For read-only access, constData() is faster because it never causes a {deep copy} to occur.

This function is mostly useful to pass a byte array to a function that accepts a {const char *}.

Note: A QByteArray can store any byte values including '\0's, but most functions that take {char *} arguments assume that the data ends at the first '\0' they encounter.

See also:: constData(), operator[]()

Definition at line 340 of file qbytearray.h.

References d, QByteArray::Data::data, and detach().

00341 { detach(); return d->data; }

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const char * QByteArray::data ( ) const [inline]

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 342 of file qbytearray.h.

References d, and QByteArray::Data::data.

00343 { return d->data; }

const char * QByteArray::constData ( ) const [inline]

This function is mostly useful to pass a byte array to a function that accepts a {const char *}.

Note: A QByteArray can store any byte values including '\0's, but most functions that take {char *} arguments assume that the data ends at the first '\0' they encounter.

See also:: data(), operator[]()

Definition at line 344 of file qbytearray.h.

References d, and QByteArray::Data::data.

00345 { return d->data; }

void QByteArray::detach ( ) [inline]

Definition at line 346 of file qbytearray.h.

References QByteArray::Data::array, d, QByteArray::Data::data, realloc(), QByteArray::Data::ref, and QByteArray::Data::size.

Referenced by begin(), data(), end(), remove(), replace(), and Q3CString::sprintf().

00347 { if (d->ref != 1 || d->data != d->array) realloc(d->size); }

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bool QByteArray::isDetached ( ) const [inline]

Definition at line 348 of file qbytearray.h.

References d, and QByteArray::Data::ref.

00349 { return d->ref == 1; }

void QByteArray::clear ( )

Clears the contents of the byte array and makes it empty.

See also:: resize(), isEmpty()

Definition at line 2474 of file qbytearray.cpp.

References d, QBasicAtomic::deref(), qFree(), QByteArray::Data::ref, QBasicAtomic::ref(), and shared_null.

Referenced by _authority(), QSocks5SocketEnginePrivate::_q_controlSocketError(), QSocks5SocketEnginePrivate::_q_emitPendingReadNotification(), ProReader::cleanup(), Translator::clear(), MetaInfo::clear(), QUrlPrivate::clear(), QFtpDTP::connectToHost(), ProReader::currentBlock(), Connection::dataLengthForCurrentDataType(), ProReader::insertVariable(), main(), QTextStream::operator>>(), operator>>(), QUrlPrivate::parse(), QKeyMapperPrivate::possibleKeysCore(), QKeyMapperPrivate::possibleKeysXKB(), Preprocessor::preprocess(), Connection::processData(), Connection::processReadyRead(), QFtpDTP::read(), QFtpDTP::readAll(), Connection::readProtocolHeader(), QUrl::setEncodedUrl(), Translator::squeeze(), ProReader::updateItem(), ProFileEvaluator::visitEndProVariable(), and QSimpleTextCodec::~QSimpleTextCodec().

02475 {
02476     if (!d->ref.deref())
02477         qFree(d);
02478     d = &shared_null;
02479     d->ref.ref();
02480 }

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const char QByteArray::at ( int i ) const [inline]

Returns the character at index position i in the byte array.

i must be a valid index position in the byte array (i.e., 0 <= i < size()).

See also:: operator[]()

Definition at line 328 of file qbytearray.h.

References d, QByteArray::Data::data, and size().

Referenced by Rpp::Preprocessor::cleanEscapedNewLines(), Rpp::Preprocessor::cleanTokenRange(), QDBusArgumentPrivate::createSignature(), dump(), Ui3Reader::fixMethod(), fixString(), fromBase64(), QUrl::fromPunycode(), BencodeParser::getByteString(), BencodeParser::getDictionary(), BencodeParser::getInteger(), BencodeParser::getList(), QSettingsPrivate::iniEscapedString(), QSettingsPrivate::iniUnescapedStringList(), ProReader::insertVariable(), QUrlPrivate::normalized(), normalizeTypeInternal(), SubArray::operator==(), ProReader::parseline(), QSocks5SocketEnginePrivate::parseNewConnection(), QSocks5SocketEnginePrivate::parseRequestMethodReply(), Moc::parseType(), PeerWireClient::processIncomingData(), read_xpm_string(), QIODevice::readLine(), PeerWireClient::sendPieceList(), and QChar::toAscii().

00329 { Q_ASSERT(i >= 0 && i < size()); return d->data[i]; }

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const char QByteArray::operator[] ( int i ) const [inline]

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Same as at(i).

Definition at line 330 of file qbytearray.h.

References d, QByteArray::Data::data, and size().

00331 { Q_ASSERT(i >= 0 && i < size()); return d->data[i]; }

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QByteRef QByteArray::operator[] ( int i ) [inline]

Returns the byte at index position i as a modifiable reference.

If an assignment is made beyond the end of the byte array, the array is extended with resize() before the assignment takes place.

Example:

        QByteArray ba;
        for (int i = 0; i < 10; ++i)
            ba[i] = 'A' + i;
        // ba == "ABCDEFGHIJ"

The return value is of type QByteRef, a helper class for QByteArray. When you get an object of type QByteRef, you can use it as if it were a char &. If you assign to it, the assignment will apply to the character in the QByteArray from which you got the reference.

See also:: at()

Definition at line 395 of file qbytearray.h.

References QByteRef.

00396 { Q_ASSERT(i >= 0); return QByteRef(*this, i); }

const char QByteArray::operator[] ( uint i ) const [inline]

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 332 of file qbytearray.h.

References d, QByteArray::Data::data, and size().

00333 { Q_ASSERT(i < uint(size())); return d->data[i]; }

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QByteRef QByteArray::operator[] ( uint i ) [inline]

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 397 of file qbytearray.h.

References QByteRef.

00398 { return QByteRef(*this, i); }

int QByteArray::indexOf	(	char	ch,
		int	from = `0`
	)			const

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Returns the index position of the first occurrence of the character ch in the byte array, searching forward from index position from. Returns -1 if ch could not be found.

Example:

        QByteArray ba("ABCBA");
        ba.indexOf("B");            // returns 1
        ba.indexOf("B", 1);         // returns 1
        ba.indexOf("B", 2);         // returns 3
        ba.indexOf("X");            // returns -1

See also:: lastIndexOf(), contains()

Definition at line 2028 of file qbytearray.cpp.

References d, QByteArray::Data::data, n, qMax(), QByteArray::Data::size, and size().

Referenced by codecForHTML(), contains(), count(), findSlot(), Ui3Reader::fixMethod(), fontFile(), generateInterfaceXml(), indexOf(), listInterface(), QTest::memberName(), QJpUnicodeConv::newConverter(), parse(), QDBusConnectionPrivate::prepareHook(), QApplicationPrivate::process_cmdline(), qt_findcharset(), read_xbm_body(), QDBusConnectionPrivate::relaySignal(), ScopedTokenReplacement::ScopedTokenReplacement(), QUrl::setEncodedUrl(), split(), and ProFileEvaluator::visitProFunction().

02029 {
02030     if (from < 0)
02031         from = qMax(from + d->size, 0);
02032     if (from < d->size) {
02033         const char *n = d->data + from - 1;
02034         const char *e = d->data + d->size;
02035         while (++n != e)
02036         if (*n == ch)
02037             return  n - d->data;
02038     }
02039     return -1;
02040 }

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int QByteArray::indexOf	(	const char *	str,
		int	from = `0`
	)			const `[inline]`

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Returns the index position of the first occurrence of the string str in the byte array, searching forward from index position from. Returns -1 if str could not be found.

Definition at line 479 of file qbytearray.h.

References fromRawData(), indexOf(), and qstrlen().

00480 { return indexOf(fromRawData(c, qstrlen(c)), i); }

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int QByteArray::indexOf	(	const QByteArray &	ba,
		int	from = `0`
	)			const

Returns the index position of the first occurrence of the byte array ba in this byte array, searching forward from index position from. Returns -1 if ba could not be found.

Example:

        QByteArray x("sticky question");
        QByteArray y("sti");
        x.indexOf(y);               // returns 0
        x.indexOf(y, 1);            // returns 10
        x.indexOf(y, 10);           // returns 10
        x.indexOf(y, 11);           // returns -1

See also:: lastIndexOf(), contains(), count()

Definition at line 1943 of file qbytearray.cpp.

References d, QByteArray::Data::data, end(), indexOf(), l, REHASH, and QByteArray::Data::size.

01944 {
01945     const int l = d->size;
01946     const int ol = ba.d->size;
01947     if (from > d->size || ol + from > l)
01948         return -1;
01949     if (ol == 0)
01950         return from;
01951     if (ol == 1)
01952         return indexOf(*ba.d->data, from);
01953 
01954     if (l > 500 && ol > 5)
01955         return QByteArrayMatcher(ba).indexIn(*this, from);
01956 
01957     const char *needle = ba.d->data;
01958     const char *haystack = d->data + from;
01959     const char *end = d->data + (l - ol);
01960     const uint ol_minus_1 = ol - 1;
01961     uint hashNeedle = 0, hashHaystack = 0;
01962     int idx;
01963     for (idx = 0; idx < ol; ++idx) {
01964         hashNeedle = ((hashNeedle<<1) + needle[idx]);
01965         hashHaystack = ((hashHaystack<<1) + haystack[idx]);
01966     }
01967     hashHaystack -= *(haystack + ol_minus_1);
01968 
01969     while (haystack <= end) {
01970         hashHaystack += *(haystack + ol_minus_1);
01971         if (hashHaystack == hashNeedle  && *needle == *haystack
01972              && strncmp(needle, haystack, ol) == 0)
01973             return haystack - d->data;
01974 
01975         REHASH(*haystack);
01976         ++haystack;
01977     }
01978     return -1;
01979 }

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int QByteArray::lastIndexOf	(	char	ch,
		int	from = `-1`
	)			const

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Returns the index position of the last occurrence of character ch in the byte array, searching backward from index position from. If from is -1 (the default), the search starts at the last (size() - 1) byte. Returns -1 if ch could not be found.

Example:

        QByteArray ba("ABCBA");
        ba.lastIndexOf("B");        // returns 3
        ba.lastIndexOf("B", 3);     // returns 3
        ba.lastIndexOf("B", 2);     // returns 1
        ba.lastIndexOf("X");        // returns -1

See also:: indexOf(), contains()

Definition at line 2148 of file qbytearray.cpp.

References b, d, QByteArray::Data::data, n, and QByteArray::Data::size.

Referenced by fontFile(), QUrl::fromPunycode(), lastIndexOf(), main(), ScopedTokenReplacement::ScopedTokenReplacement(), and ProFileEvaluator::visitProFunction().

02149 {
02150     if (from < 0)
02151         from += d->size;
02152     else if (from > d->size)
02153         from = d->size-1;
02154     if (from >= 0) {
02155         const char *b = d->data;
02156         const char *n = d->data + from + 1;
02157         while (n-- != b)
02158             if (*n == ch)
02159                 return  n - b;
02160     }
02161     return -1;
02162 }

int QByteArray::lastIndexOf	(	const char *	str,
		int	from = `-1`
	)			const `[inline]`

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Returns the index position of the last occurrence of the string str in the byte array, searching backward from index position from. If from is -1 (the default), the search starts at the last (size() - 1) byte. Returns -1 if str could not be found.

Definition at line 481 of file qbytearray.h.

References fromRawData(), lastIndexOf(), and qstrlen().

00482 { return lastIndexOf(fromRawData(c, qstrlen(c)), i); }

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int QByteArray::lastIndexOf	(	const QByteArray &	ba,
		int	from = `-1`
	)			const

Returns the index position of the last occurrence of the byte array ba in this byte array, searching backward from index position from. If from is -1 (the default), the search starts at the last byte. Returns -1 if ba could not be found.

Example:

        QByteArray x("crazy azimuths");
        QByteArray y("azy");
        x.lastIndexOf(y);           // returns 6
        x.lastIndexOf(y, 6);        // returns 6
        x.lastIndexOf(y, 5);        // returns 2
        x.lastIndexOf(y, 1);        // returns -1

See also:: indexOf(), contains(), count()

Definition at line 2061 of file qbytearray.cpp.

References d, QByteArray::Data::data, end(), h, l, lastIndexOf(), n, REHASH, and QByteArray::Data::size.

02062 {
02063     const int ol = ba.d->size;
02064     const int l = d->size;
02065     int delta = l - ol;
02066     if (from < 0)
02067         from = delta;
02068     if (from < 0 || from > l)
02069         return -1;
02070     if (from > delta)
02071         from = delta;
02072     if (ol == 1)
02073         return lastIndexOf(*ba.d->data, from);
02074 
02075     const char *needle = ba.d->data;
02076     const char *haystack = d->data + from;
02077     const char *end = d->data;
02078     const uint ol_minus_1 = ol - 1;
02079     const char *n = needle + ol_minus_1;
02080     const char *h = haystack + ol_minus_1;
02081     uint hashNeedle = 0, hashHaystack = 0;
02082     int idx;
02083     for (idx = 0; idx < ol; ++idx) {
02084         hashNeedle = ((hashNeedle<<1) + *(n-idx));
02085         hashHaystack = ((hashHaystack<<1) + *(h-idx));
02086     }
02087     hashHaystack -= *haystack;
02088     while (haystack >= end) {
02089         hashHaystack += *haystack;
02090         if (hashHaystack == hashNeedle  && strncmp(needle, haystack, ol) == 0)
02091             return haystack-d->data;
02092         --haystack;
02093         REHASH(*(haystack + ol));
02094     }
02095     return -1;
02096 
02097 }

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QBool QByteArray::contains ( char ch ) const [inline]

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Returns true if the byte array contains the character ch; otherwise returns false.

Definition at line 431 of file qbytearray.h.

References indexOf().

Referenced by QSvgIOHandler::canRead(), PortingRules::checkScopeAddRule(), contains(), detectLineEndings(), Q3Url::encode(), Q3FileDialogPrivate::encodeFileName(), PreprocessReplace::evaluateText(), QProcessPrivate::execChild(), fontFile(), main(), Semantic::parseDeclaration(), QPictureHandler::QPictureHandler(), read_xbm_body(), and ScopedTokenReplacement::ScopedTokenReplacement().

00432 { return QBool(indexOf(c) != -1); }

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QBool QByteArray::contains ( const char * str ) const [inline]

Definition at line 483 of file qbytearray.h.

References contains(), fromRawData(), and qstrlen().

00484 { return contains(fromRawData(c, qstrlen(c))); }

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QBool QByteArray::contains ( const QByteArray & ba ) const [inline]

Returns true if the byte array contains an occurrence of the byte array ba; otherwise returns false.

See also:: indexOf(), count()

Definition at line 429 of file qbytearray.h.

References a, and indexOf().

00430 { return QBool(indexOf(a) != -1); }

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int QByteArray::count ( char ch ) const

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Returns the number of occurrences of character ch in the byte array.

See also:: contains(), indexOf()

Definition at line 2211 of file qbytearray.cpp.

References b, d, QByteArray::Data::data, num, and QByteArray::Data::size.

Referenced by Rpp::RppTreeEvaluator::cloneTokenList(), TokenEngine::copy(), dump(), PreprocessReplace::evaluateIncludeDirective(), Rpp::RppTreeEvaluator::evaluateMacro(), Rpp::RppTreeEvaluator::evaluateMacroInternal(), QUrl::fromPercentEncoding(), ProReader::insertVariable(), ProReader::parseline(), ScopedTokenReplacement::ScopedTokenReplacement(), QUrl::toPercentEncoding(), and translationAttempt().

02212 {
02213     int num = 0;
02214     const char *i = d->data + d->size;
02215     const char *b = d->data;
02216     while (i != b)
02217         if (*--i == ch)
02218             ++num;
02219     return num;
02220 }

int QByteArray::count ( const char * str ) const

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Returns the number of (potentially overlapping) occurrences of string str in the byte array.

Definition at line 2193 of file qbytearray.cpp.

References indexOf(), and num.

02194 {
02195     int num = 0;
02196     int i = -1;
02197     while ((i = indexOf(str, i + 1)) != -1)
02198         ++num;
02199     return num;
02200 }

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int QByteArray::count ( const QByteArray & ba ) const

Returns the number of (potentially overlapping) occurrences of byte array ba in this byte array.

See also:: contains(), indexOf()

Definition at line 2171 of file qbytearray.cpp.

References d, QByteArrayMatcher::indexIn(), indexOf(), num, and QByteArray::Data::size.

02172 {
02173     int num = 0;
02174     int i = -1;
02175     if (d->size > 500 && ba.d->size > 5) {
02176         QByteArrayMatcher matcher(ba);
02177         while ((i = matcher.indexIn(*this, i + 1)) != -1)
02178             ++num;
02179     } else {
02180         while ((i = indexOf(ba, i + 1)) != -1)
02181             ++num;
02182     }
02183     return num;
02184 }

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QByteArray QByteArray::left ( int len ) const

Returns a byte array that contains the leftmost len bytes of this byte array.

The entire byte array is returned if len is greater than size().

Example:

        QByteArray x("Pineapple");
        QByteArray y = x.left(4);
        // y == "Pine"

See also:: right(), mid(), startsWith(), truncate()

Definition at line 2344 of file qbytearray.cpp.

References d, QByteArray::Data::data, QByteArray(), and QByteArray::Data::size.

Referenced by QTextCodec::codecForHtml(), Ui3Reader::fixMethod(), fontFile(), QUrl::fromPunycode(), generateInterfaceXml(), Generator::generateProperties(), QXIMInputContext::language(), Q3CString::left(), leftJustified(), QTest::memberName(), parse(), QMetaObject::property(), qt_findcharset(), rightJustified(), ProFileEvaluator::visitProFunction(), and wrapDSC().

02345 {
02346     if (len >= d->size)
02347         return *this;
02348     if (len < 0)
02349         len = 0;
02350     return QByteArray(d->data, len);
02351 }

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QByteArray QByteArray::right ( int len ) const

Returns a byte array that contains the rightmost len bytes of this byte array.

The entire byte array is returned if len is greater than size().

Example:

        QByteArray x("Pineapple");
        QByteArray y = x.right(5);
        // y == "apple"

See also:: endsWith(), left(), mid()

Definition at line 2370 of file qbytearray.cpp.

References d, QByteArray::Data::data, QByteArray(), and QByteArray::Data::size.

Referenced by Moc::generate(), QApplicationPrivate::process_cmdline(), Q3CString::right(), and QUrlPrivate::toEncoded().

02371 {
02372     if (len >= d->size)
02373         return *this;
02374     if (len < 0)
02375         len = 0;
02376     return QByteArray(d->data + d->size - len, len);
02377 }

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QByteArray QByteArray::mid	(	int	pos,
		int	len = `-1`
	)			const

Returns a byte array containing len bytes from this byte array, starting at position pos.

If len is -1 (the default), or pos + len >= size(), returns a byte array containing all bytes starting at position pos until the end of the byte array.

Example:

        QByteArray x("Five pineapples");
        QByteArray y = x.mid(5, 4);     // y == "pine"
        QByteArray z = x.mid(5);        // z == "pineapples"

See also:: left(), right()

Definition at line 2397 of file qbytearray.cpp.

References d, QByteArray::Data::data, QByteArray(), shared_empty, shared_null, and QByteArray::Data::size.

Referenced by codecForHTML(), composePreprocessorOutput(), Ui3Reader::fixMethod(), fontFile(), QUrl::fromPunycode(), Moc::generate(), Generator::generateProperties(), BencodeParser::getByteString(), BencodeParser::infoSection(), Symbol::lexem(), main(), Q3CString::mid(), QJpUnicodeConv::newConverter(), Symbol::operator QByteArray(), parse(), MetaInfo::parse(), ProReader::parseline(), PeerWireClient::processIncomingData(), QMetaObject::property(), qt_findcharset(), ScopedTokenReplacement::ScopedTokenReplacement(), split(), PropertyDef::stdCppSet(), tokenize(), Symbol::unquotedLexem(), ProFileEvaluator::visitProFunction(), and wrapDSC().

02398 {
02399     if (d == &shared_null || d == &shared_empty || pos >= d->size)
02400         return QByteArray();
02401     if (len < 0)
02402         len = d->size - pos;
02403     if (pos < 0) {
02404         len += pos;
02405         pos = 0;
02406     }
02407     if (len + pos > d->size)
02408         len = d->size - pos;
02409     if (pos == 0 && len == d->size)
02410         return *this;
02411     return QByteArray(d->data + pos, len);
02412 }

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bool QByteArray::startsWith ( const QByteArray & ba ) const

Returns true if this byte array starts with byte array ba; otherwise returns false.

Example:

        QByteArray url("ftp://ftp.trolltech.com/");
        if (url.startsWith("ftp:"))
            ...

See also:: endsWith(), left()

Definition at line 2242 of file qbytearray.cpp.

References d, QByteArray::Data::data, and QByteArray::Data::size.

Referenced by QCoreApplication::arguments(), constRefArg(), findSlot(), QUrl::fromPunycode(), QFreetypeFace::getFace(), QXIMInputContext::language(), main(), QX11Data::motifdndObtainData(), placeCall(), and Preprocessor::preprocess().

02243 {
02244     if (d == ba.d || ba.d->size == 0)
02245         return true;
02246     if (d->size < ba.d->size)
02247         return false;
02248     return memcmp(d->data, ba.d->data, ba.d->size) == 0;
02249 }

bool QByteArray::startsWith ( char ch ) const

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Returns true if this byte array starts with character ch; otherwise returns false.

Definition at line 2271 of file qbytearray.cpp.

References d, QByteArray::Data::data, and QByteArray::Data::size.

02272 {
02273     if (d->size == 0)
02274         return false;
02275     return d->data[0] == ch;
02276 }

bool QByteArray::startsWith ( const char * str ) const

Definition at line 2256 of file qbytearray.cpp.

References d, QByteArray::Data::data, len, qstrlen(), qstrncmp(), and QByteArray::Data::size.

02257 {
02258     if (!str || !*str)
02259         return true;
02260     int len = qstrlen(str);
02261     if (d->size < len)
02262         return false;
02263     return qstrncmp(d->data, str, len) == 0;
02264 }

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bool QByteArray::endsWith ( const QByteArray & ba ) const

Returns true if this byte array ends with byte array ba; otherwise returns false.

Example:

        QByteArray url("http://www.trolltech.com/index.html");
        if (url.endsWith(".html"))
            ...

See also:: startsWith(), right()

Definition at line 2291 of file qbytearray.cpp.

References d, QByteArray::Data::data, and QByteArray::Data::size.

Referenced by CPP::WriteIconData::acceptImage(), QDBusViewer::callMethod(), Connection::dataLengthForCurrentDataType(), QProcessPrivate::execChild(), Generator::generateProperties(), QTest::qSignalDumperCallback(), Connection::readDataIntoBuffer(), templateArg(), and ProReader::updateItem().

02292 {
02293     if (d == ba.d || ba.d->size == 0)
02294         return true;
02295     if (d->size < ba.d->size)
02296         return false;
02297     return memcmp(d->data + d->size - ba.d->size, ba.d->data, ba.d->size) == 0;
02298 }

bool QByteArray::endsWith ( char ch ) const

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Returns true if this byte array ends with character ch; otherwise returns false.

Definition at line 2320 of file qbytearray.cpp.

References d, QByteArray::Data::data, and QByteArray::Data::size.

02321 {
02322     if (d->size == 0)
02323         return false;
02324     return d->data[d->size - 1] == ch;
02325 }

bool QByteArray::endsWith ( const char * str ) const

Definition at line 2305 of file qbytearray.cpp.

References d, QByteArray::Data::data, len, qstrlen(), qstrncmp(), and QByteArray::Data::size.

02306 {
02307     if (!str || !*str)
02308         return true;
02309     int len = qstrlen(str);
02310     if (d->size < len)
02311         return false;
02312     return qstrncmp(d->data + d->size - len, str, len) == 0;
02313 }

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void QByteArray::truncate ( int pos )

Truncates the byte array at index position pos.

If pos is beyond the end of the array, nothing happens.

Example:

        QByteArray ba("Stockholm");
        ba.truncate(5);             // ba == "Stock"

See also:: chop(), resize(), left()

Definition at line 1081 of file qbytearray.cpp.

References resize(), and size().

Referenced by _IPv6Address(), QIsciiCodec::convertFromUnicode(), Q3Url::decode(), fromBase64(), QMetaObject::invokeMethod(), listInterface(), QIBaseDriver::open(), QDBusMetaObjectGenerator::parseMethods(), QDBusMetaObjectGenerator::parseSignals(), QDBusConnectionPrivate::prepareHook(), QDBusConnectionPrivate::relaySignal(), and toBase64().

01082 {
01083     if (pos < d->size)
01084         resize(pos);
01085 }

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void QByteArray::chop ( int n )

Removes n bytes from the end of the byte array.

If n is greater than size(), the result is an empty byte array.

Example:

        QByteArray ba("STARTTLS\r\n");
        ba.chop(2);                 // ba == "STARTTLS"

See also:: truncate(), resize(), left()

Definition at line 1103 of file qbytearray.cpp.

References d, resize(), and QByteArray::Data::size.

Referenced by composePreprocessorOutput(), Connection::dataLengthForCurrentDataType(), Generator::generateProperties(), ProReader::insertVariable(), QTest::qSignalDumperCallback(), QIODevice::readAll(), and QUrlPrivate::toEncoded().

01104 {
01105     if (n > 0)
01106         resize(d->size - n);
01107 }

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QByteArray QByteArray::toLower ( ) const

Returns a lowercase copy of the byte array. The bytearray is interpreted as a Latin-1 encoded string.

Example:

        QByteArray x("TROlltECH");
        QByteArray y = x.toLower();
        // y == "trolltech"

See also:: toUpper(), {Note on 8-bit character comparisons}

Definition at line 2427 of file qbytearray.cpp.

References QUnicodeTables::lower(), p, and s.

Referenced by Q3ImageDrag::canDecode(), QTextCodec::codecForHtml(), createReadHandler(), Q3MimeSourceFactory::dataInternal(), Q3ImageDrag::decode(), PreprocessReplace::evaluateIncludeDirective(), fontFile(), imageReadMimeFormats(), imageWriteMimeFormats(), FilePorter::includeAnalyse(), Q3CString::lower(), qt_fillFontDef(), Q3ImageDrag::setImage(), and ProFileEvaluator::templateType().

02428 {
02429     QByteArray s(*this);
02430     register uchar *p = reinterpret_cast<uchar *>(s.data());
02431     if (p) {
02432         while (*p) {
02433             *p = QUnicodeTables::lower(*p);
02434             p++;
02435         }
02436     }
02437     return s;
02438 }

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QByteArray QByteArray::toUpper ( ) const

Returns an uppercase copy of the byte array. The bytearray is interpreted as a Latin-1 encoded string.

Example:

        QByteArray x("TROlltECH");
        QByteArray y = x.toUpper();
        // y == "TROLLTECH"

See also:: toLower(), {Note on 8-bit character comparisons}

Definition at line 2454 of file qbytearray.cpp.

References p, s, and QUnicodeTables::upper().

Referenced by Q3ImageDrag::encodedData(), MainWindow::findCodecs(), MainWindow::saveFile(), and Q3CString::upper().

02455 {
02456     QByteArray s(*this);
02457     register char *p = s.data();
02458     if (p) {
02459         while (*p) {
02460             *p = QUnicodeTables::upper(*p);
02461             p++;
02462         }
02463     }
02464     return s;
02465 }

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QByteArray QByteArray::trimmed ( ) const

Returns a byte array that has whitespace removed from the start and the end.

Whitespace means any character for which the standard C++ isspace() function returns true. This includes the ASCII characters '\t', '\n', '\v', '\f', '\r', and ' '.

Example:

        QByteArray ba("  lots\t of\nwhitespace\r\n ");
        ba = ba.trimmed();
        // ba == "lots\t of\nwhitespace";

Unlike simplified(), trimmed() leaves internal whitespace alone.

See also:: simplified()

Definition at line 2912 of file qbytearray.cpp.

References d, QByteArray::Data::data, end(), l, QByteArray(), QByteArray::Data::ref, QBasicAtomic::ref(), s, shared_empty, QByteArray::Data::size, and start.

Referenced by CPP::WriteIconData::acceptImage(), QualifiedNameParser::findScopeOperator(), ReplaceToken::getTokenTextReplacements(), ProReader::insertComment(), ProReader::insertVariable(), QJpUnicodeConv::newConverter(), QualifiedNameParser::nextScopeToken(), QConfFileSettingsPrivate::readIniFile(), QMimeDataPrivate::retrieveTypedData(), Q3CString::stripWhiteSpace(), Semantic::typeOfDeclaration(), and ProReader::updateItem().

02913 {
02914     if (d->size == 0)
02915         return *this;
02916     const char *s = d->data;
02917     if (!isspace(uchar(*s)) && !isspace(uchar(s[d->size-1])))
02918         return *this;
02919     int start = 0;
02920     int end = d->size - 1;
02921     while (start<=end && isspace(uchar(s[start])))  // skip white space from start
02922         start++;
02923     if (start <= end) {                          // only white space
02924         while (end && isspace(uchar(s[end])))           // skip white space from end
02925             end--;
02926     }
02927     int l = end - start + 1;
02928     if (l <= 0) {
02929         shared_empty.ref.ref();
02930         return QByteArray(&shared_empty, 0, 0);
02931     }
02932     return QByteArray(s+start, l);
02933 }

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QByteArray QByteArray::simplified ( ) const

Returns a byte array that has whitespace removed from the start and the end, and which has each sequence of internal whitespace replaced with a single space.

Whitespace means any character for which the standard C++ isspace() function returns true. This includes the ASCII characters '\t', '\n', '\v', '\f', '\r', and ' '.

Example:

        QByteArray ba("  lots\t of\nwhitespace\r\n ");
        ba = ba.simplified();
        // ba == "lots of whitespace";

See also:: trimmed()

Definition at line 2867 of file qbytearray.cpp.

References d, QByteArray::Data::data, resize(), and QByteArray::Data::size.

Referenced by Semantic::declaratorToString(), parse(), ProReader::parseline(), Q3CString::simplifyWhiteSpace(), Semantic::typeOfDeclaration(), and wrapDSC().

02868 {
02869     if (d->size == 0)
02870         return *this;
02871     QByteArray result;
02872     result.resize(d->size);
02873     const char *from = d->data;
02874     const char *fromend = from + d->size;
02875     int outc=0;
02876     char *to = result.d->data;
02877     for (;;) {
02878         while (from!=fromend && isspace(uchar(*from)))
02879             from++;
02880         while (from!=fromend && !isspace(uchar(*from)))
02881             to[outc++] = *from++;
02882         if (from!=fromend)
02883             to[outc++] = ' ';
02884         else
02885             break;
02886     }
02887     if (outc > 0 && to[outc-1] == ' ')
02888         outc--;
02889     result.resize(outc);
02890     return result;
02891 }

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QByteArray QByteArray::leftJustified	(	int	width,
		char	fill = `' '`,
		bool	truncate = `false`
	)			const

Returns a byte array of size width that contains this byte array padded by the fill character.

If truncate is false and the size() of the byte array is more than width, then the returned byte array is a copy of this byte array.

If truncate is true and the size() of the byte array is more than width, then any bytes in a copy of the byte array after position width are removed, and the copy is returned.

Example:

        QByteArray x("apple");
        QByteArray y = x.leftJustified(8, '.');   // y == "apple..."

See also:: rightJustified()

Definition at line 2956 of file qbytearray.cpp.

References d, QByteArray::Data::data, left(), len, resize(), and QByteArray::Data::size.

Referenced by qFillBufferWithString().

02957 {
02958     QByteArray result;
02959     int len = d->size;
02960     int padlen = width - len;
02961     if (padlen > 0) {
02962         result.resize(len+padlen);
02963         if (len)
02964             memcpy(result.d->data, d->data, len);
02965         memset(result.d->data+len, fill, padlen);
02966     } else {
02967         if (truncate)
02968             result = left(width);
02969         else
02970             result = *this;
02971     }
02972     return result;
02973 }

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QByteArray QByteArray::rightJustified	(	int	width,
		char	fill = `' '`,
		bool	truncate = `false`
	)			const

Returns a byte array of size width that contains the fill character followed by this byte array.

If truncate is false and the size of the byte array is more than width, then the returned byte array is a copy of this byte array.

If truncate is true and the size of the byte array is more than width, then the resulting byte array is truncated at position width.

Example:

        QByteArray x("apple");
        QByteArray y = x.rightJustified(8, '.');    // y == "...apple"

See also:: leftJustified()

Definition at line 2996 of file qbytearray.cpp.

References d, QByteArray::Data::data, data(), left(), len, resize(), and QByteArray::Data::size.

02997 {
02998     QByteArray result;
02999     int len = d->size;
03000     int padlen = width - len;
03001     if (padlen > 0) {
03002         result.resize(len+padlen);
03003         if (len)
03004             memcpy(result.d->data+padlen, data(), len);
03005         memset(result.d->data, fill, padlen);
03006     } else {
03007         if (truncate)
03008             result = left(width);
03009         else
03010             result = *this;
03011     }
03012     return result;
03013 }

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QByteArray & QByteArray::prepend ( char ch )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Prepends the character ch to this byte array.

Definition at line 1440 of file qbytearray.cpp.

References QByteArray::Data::alloc, d, QByteArray::Data::data, qAllocMore(), realloc(), QByteArray::Data::ref, and QByteArray::Data::size.

Referenced by QObject::connect(), QFormBuilder::createConnections(), Moc::generate(), QSettingsPrivate::iniEscapedKey(), normalizeTypeInternal(), parse(), Moc::parse(), Q3TextEdit::pasteSubType(), Q3CString::prepend(), push_front(), QXIMInputContext::QXIMInputContext(), QDBusAbstractAdaptor::setAutoRelaySignals(), tokenize(), QUrl::toPunycode(), and QConfFileSettingsPrivate::writeIniFile().

01441 {
01442     if (d->ref != 1 || d->size + 1 > d->alloc)
01443         realloc(qAllocMore(d->size + 1, sizeof(Data)));
01444     memmove(d->data+1, d->data, d->size);
01445     d->data[0] = ch;
01446     ++d->size;
01447     d->data[d->size] = '\0';
01448     return *this;
01449 }

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QByteArray & QByteArray::prepend ( const char * str )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Prepends the string str to this byte array.

Definition at line 1420 of file qbytearray.cpp.

References QByteArray::Data::alloc, d, QByteArray::Data::data, len, qAllocMore(), qstrlen(), realloc(), QByteArray::Data::ref, and QByteArray::Data::size.

01421 {
01422     if (str) {
01423         int len = qstrlen(str);
01424         if (d->ref != 1 || d->size + len > d->alloc)
01425             realloc(qAllocMore(d->size + len, sizeof(Data)));
01426         memmove(d->data+len, d->data, d->size);
01427         memcpy(d->data, str, len);
01428         d->size += len;
01429         d->data[d->size] = '\0';
01430     }
01431     return *this;
01432 }

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QByteArray & QByteArray::prepend ( const QByteArray & ba )

Prepends the byte array ba to this byte array and returns a reference to this byte array.

Example:

        QByteArray x("ship");
        QByteArray y("air");
        x.prepend(y);
        // x == "airship"

This is the same as insert(0, ba).

See also:: append(), insert()

Definition at line 1402 of file qbytearray.cpp.

References append(), d, shared_empty, and shared_null.

01403 {
01404     if (d == &shared_null || d == &shared_empty) {
01405         *this = ba;
01406     } else if (ba.d != &shared_null) {
01407         QByteArray tmp = *this;
01408         *this = ba;
01409         append(tmp);
01410     }
01411     return *this;
01412 }

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QByteArray & QByteArray::append ( char ch )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Appends the character ch to this byte array.

Definition at line 1525 of file qbytearray.cpp.

References QByteArray::Data::alloc, d, QByteArray::Data::data, qAllocMore(), realloc(), QByteArray::Data::ref, and QByteArray::Data::size.

Referenced by Q3CString::append(), append(), Rpp::RppTreeEvaluator::evaluateMacroInternal(), generateGlyphTables(), QMetaObject::invokeMethod(), operator+=(), parse(), QDBusMetaObjectGenerator::parseMethods(), QDBusMetaObjectGenerator::parseSignals(), prepend(), push_back(), QTest::qSignalDumperCallback(), read_xpm_body(), Connection::readDataIntoBuffer(), runlengthEncode(), PeerManager::sendBroadcastDatagram(), QUrl::setEncodedUrl(), tokenize(), write_pbm_image(), and QConfFileSettingsPrivate::writeIniFile().

01526 {
01527     if (d->ref != 1 || d->size + 1 > d->alloc)
01528         realloc(qAllocMore(d->size + 1, sizeof(Data)));
01529     d->data[d->size++] = ch;
01530     d->data[d->size] = '\0';
01531     return *this;
01532 }

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QByteArray & QByteArray::append ( const char * str )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Appends the string str to this byte array.

Definition at line 1507 of file qbytearray.cpp.

References QByteArray::Data::alloc, d, QByteArray::Data::data, len, qAllocMore(), qstrlen(), realloc(), QByteArray::Data::ref, and QByteArray::Data::size.

01508 {
01509     if (str) {
01510         int len = qstrlen(str);
01511         if (d->ref != 1 || d->size + len > d->alloc)
01512             realloc(qAllocMore(d->size + len, sizeof(Data)));
01513         memcpy(d->data + d->size, str, len + 1); // include null terminator
01514         d->size += len;
01515     }
01516     return *this;
01517 }

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QByteArray & QByteArray::append ( const QByteArray & ba )

Appends the byte array ba onto the end of this byte array.

Example:

        QByteArray x("free");
        QByteArray y("dom");
        x.append(y);
        // x == "freedom"

This is the same as insert(size(), ba).

This operation is typically very fast ({constant time}), because QByteArray preallocates extra space at the end of the character data so it can grow without reallocating the entire data each time.

See also:: operator+=(), prepend(), insert()

Definition at line 1472 of file qbytearray.cpp.

References QByteArray::Data::alloc, d, QByteArray::Data::data, qAllocMore(), realloc(), QByteArray::Data::ref, shared_empty, shared_null, and QByteArray::Data::size.

01473 {
01474     if (d == &shared_null || d == &shared_empty) {
01475         *this = ba;
01476     } else if (ba.d != &shared_null) {
01477         if (d->ref != 1 || d->size + ba.d->size > d->alloc)
01478             realloc(qAllocMore(d->size + ba.d->size, sizeof(Data)));
01479         memcpy(d->data + d->size, ba.d->data, ba.d->size);
01480         d->size += ba.d->size;
01481         d->data[d->size] = '\0';
01482     }
01483     return *this;
01484 }

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QByteArray & QByteArray::insert	(	int	i,
		char	ch
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Inserts character ch at index position i in the byte array. If i is greater than size(), the array is first extended using resize().

Definition at line 1620 of file qbytearray.cpp.

References qbytearray_insert().

Referenced by TextReplacements::apply(), charString(), FilePorter::includeAnalyse(), QSettingsPrivate::iniEscapedString(), Q3CString::insert(), insert(), replace(), MetaTranslator::save(), and write_pbm_image().

01621 {
01622     return qbytearray_insert(this, i, &ch, 1);
01623 }

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QByteArray & QByteArray::insert	(	int	i,
		const char *	str
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Inserts the string str at position i in the byte array.

If i is greater than size(), the array is first extended using resize().

Definition at line 1607 of file qbytearray.cpp.

References qbytearray_insert(), and qstrlen().

01608 {
01609     return qbytearray_insert(this, i, str, qstrlen(str));
01610 }

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QByteArray & QByteArray::insert	(	int	i,
		const QByteArray &	ba
	)

Inserts the byte array ba at index position i and returns a reference to this byte array.

Example:

        QByteArray ba("Meal");
        ba.insert(1, QByteArray("ontr"));
        // ba == "Montreal"

See also:: append(), prepend(), replace(), remove()

Definition at line 1572 of file qbytearray.cpp.

References TokenEngine::copy(), and qbytearray_insert().

01573 {
01574     QByteArray copy(ba);
01575     return qbytearray_insert(this, i, copy.d->data, copy.d->size);
01576 }

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QByteArray & QByteArray::remove	(	int	pos,
		int	len
	)

Removes len bytes from the array, starting at index position pos, and returns a reference to the array.

If pos is out of range, nothing happens. If pos is valid, but pos + len is larger than the size of the array, the array is truncated at position pos.

Example:

        QByteArray ba("Montreal");
        ba.remove(1, 4);
        // ba == "Meal"

See also:: insert(), replace()

Definition at line 1643 of file qbytearray.cpp.

References d, QByteArray::Data::data, detach(), resize(), and QByteArray::Data::size.

Referenced by TextReplacements::apply(), QFreetypeFace::getFace(), QGifHandler::imageIsComing(), main(), QX11Data::motifdndObtainData(), normalizeTypeInternal(), parse(), QSocks5SocketEnginePrivate::parseNewConnection(), QSocks5SocketEnginePrivate::parseRequestMethodReply(), QGifHandler::read(), read_xpm_string(), PeerWireClient::readData(), Q3CString::remove(), replace(), and PeerWireClient::writeToSocket().

01644 {
01645     if (len <= 0  || pos >= d->size || pos < 0)
01646         return *this;
01647     detach();
01648     if (pos + len >= d->size) {
01649         resize(pos);
01650     } else {
01651         memmove(d->data + pos, d->data + pos + len, d->size - pos - len);
01652         resize(d->size - len);
01653     }
01654     return *this;
01655 }

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QByteArray & QByteArray::replace	(	int	pos,
		int	len,
		const char *	after
	)			`[inline]`

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 485 of file qbytearray.h.

References fromRawData(), and qstrlen().

Referenced by Semantic::declaratorToString(), encodeEntity(), Generator::generateCode(), Q3CString::replace(), replace(), QUrl::setEncodedUrl(), and QFontSubset::toType1().

00486 { return replace(index, len, fromRawData(c, qstrlen(c))); }

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QByteArray & QByteArray::replace	(	int	pos,
		int	len,
		const QByteArray &	after
	)

Replaces len bytes from index position pos with the byte array after, and returns a reference to this byte array.

Example:

        QByteArray x("Say yes!");
        QByteArray y("no");
        x.replace(4, 3, y);
        // x == "Say no!"

See also:: insert(), remove()

Definition at line 1672 of file qbytearray.cpp.

References TokenEngine::copy(), insert(), and remove().

01673 {
01674     QByteArray copy(after);
01675     remove(pos, len);
01676     return insert(pos, copy);
01677 }

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QByteArray & QByteArray::replace	(	char	before,
		const char *	after
	)			`[inline]`

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Replaces every occurrence of the character before with the string after.

Definition at line 487 of file qbytearray.h.

References fromRawData(), qstrlen(), and replace().

00488 { return replace(before,

QByteArray Class Reference

Detailed Description

Public Types

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Static Private Attributes

Friends

Related Functions

Classes

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation


Public Types
typedef char *	iterator
typedef const char *	const_iterator
typedef iterator	Iterator
typedef const_iterator	ConstIterator
typedef const char &	const_reference
typedef char &	reference
Public Member Functions
	QByteArray ()
	QByteArray (const char *)
	QByteArray (const char *, int size)
	QByteArray (int size, char c)
	QByteArray (const QByteArray &)
	~QByteArray ()
QByteArray &	operator= (const QByteArray &)
QByteArray &	operator= (const char *str)
int	size () const
bool	isEmpty () const
void	resize (int size)
QByteArray &	fill (char c, int size=-1)
int	capacity () const
void	reserve (int size)
void	squeeze ()
	operator const char * () const
	operator const void * () const
char *	data ()
const char *	data () const
const char *	constData () const
void	detach ()
bool	isDetached () const
void	clear ()
const char	at (int i) const
const char	operator[] (int i) const
QByteRef	operator[] (int i)
const char	operator[] (uint i) const
QByteRef	operator[] (uint i)
int	indexOf (char c, int from=0) const
int	indexOf (const char *c, int from=0) const
int	indexOf (const QByteArray &a, int from=0) const
int	lastIndexOf (char c, int from=-1) const
int	lastIndexOf (const char *c, int from=-1) const
int	lastIndexOf (const QByteArray &a, int from=-1) const
QBool	contains (char c) const
QBool	contains (const char *a) const
QBool	contains (const QByteArray &a) const
int	count (char c) const
int	count (const char *a) const
int	count (const QByteArray &a) const
QByteArray	left (int len) const
QByteArray	right (int len) const
QByteArray	mid (int index, int len=-1) const
bool	startsWith (const QByteArray &a) const
bool	startsWith (char c) const
bool	startsWith (const char *c) const
bool	endsWith (const QByteArray &a) const
bool	endsWith (char c) const
bool	endsWith (const char *c) const
void	truncate (int pos)
void	chop (int n)
QByteArray	toLower () const
QByteArray	toUpper () const
QByteArray	trimmed () const
QByteArray	simplified () const
QByteArray	leftJustified (int width, char fill= ' ', bool truncate=false) const
QByteArray	rightJustified (int width, char fill= ' ', bool truncate=false) const
QByteArray &	prepend (char c)
QByteArray &	prepend (const char *s)
QByteArray &	prepend (const QByteArray &a)
QByteArray &	append (char c)
QByteArray &	append (const char *s)
QByteArray &	append (const QByteArray &a)
QByteArray &	insert (int i, char c)
QByteArray &	insert (int i, const char *s)
QByteArray &	insert (int i, const QByteArray &a)
QByteArray &	remove (int index, int len)
QByteArray &	replace (int index, int len, const char *s)
QByteArray &	replace (int index, int len, const QByteArray &s)
QByteArray &	replace (char before, const char *after)
QByteArray &	replace (char before, const QByteArray &after)
QByteArray &	replace (const char before, const char after)
QByteArray &	replace (const QByteArray &before, const QByteArray &after)
QByteArray &	replace (const QByteArray &before, const char *after)
QByteArray &	replace (const char *before, const QByteArray &after)
QByteArray &	replace (char before, char after)
QByteArray &	operator+= (char c)
QByteArray &	operator+= (const char *s)
QByteArray &	operator+= (const QByteArray &a)
QList< QByteArray >	split (char sep) const
QT_ASCII_CAST_WARN QByteArray &	append (const QString &s)
QT_ASCII_CAST_WARN QByteArray &	insert (int i, const QString &s)
QT_ASCII_CAST_WARN QByteArray &	replace (const QString &before, const char *after)
QT_ASCII_CAST_WARN QByteArray &	replace (char c, const QString &after)
QT_ASCII_CAST_WARN QByteArray &	replace (const QString &before, const QByteArray &after)
QT_ASCII_CAST_WARN QByteArray &	operator+= (const QString &s)
QT_ASCII_CAST_WARN int	indexOf (const QString &s, int from=0) const
QT_ASCII_CAST_WARN int	lastIndexOf (const QString &s, int from=-1) const
QT_ASCII_CAST_WARN bool	operator== (const QString &s2) const
QT_ASCII_CAST_WARN bool	operator!= (const QString &s2) const
QT_ASCII_CAST_WARN bool	operator< (const QString &s2) const
QT_ASCII_CAST_WARN bool	operator> (const QString &s2) const
QT_ASCII_CAST_WARN bool	operator<= (const QString &s2) const
QT_ASCII_CAST_WARN bool	operator>= (const QString &s2) const
short	toShort (bool *ok=0, int base=10) const
ushort	toUShort (bool *ok=0, int base=10) const
int	toInt (bool *ok=0, int base=10) const
uint	toUInt (bool *ok=0, int base=10) const
long	toLong (bool *ok=0, int base=10) const
ulong	toULong (bool *ok=0, int base=10) const
qlonglong	toLongLong (bool *ok=0, int base=10) const
qulonglong	toULongLong (bool *ok=0, int base=10) const
float	toFloat (bool *ok=0) const
double	toDouble (bool *ok=0) const
QByteArray	toBase64 () const
QByteArray &	setNum (short, int base=10)
QByteArray &	setNum (ushort, int base=10)
QByteArray &	setNum (int, int base=10)
QByteArray &	setNum (uint, int base=10)
QByteArray &	setNum (qlonglong, int base=10)
QByteArray &	setNum (qulonglong, int base=10)
QByteArray &	setNum (float, char f= 'g', int prec=6)
QByteArray &	setNum (double, char f= 'g', int prec=6)
iterator	begin ()
const_iterator	begin () const
const_iterator	constBegin () const
iterator	end ()
const_iterator	end () const
const_iterator	constEnd () const
void	push_back (char c)
void	push_back (const char *c)
void	push_back (const QByteArray &a)
void	push_front (char c)
void	push_front (const char *c)
void	push_front (const QByteArray &a)
int	count () const
int	length () const
bool	isNull () const
Static Public Member Functions
static QByteArray	number (int, int base=10)
static QByteArray	number (uint, int base=10)
static QByteArray	number (qlonglong, int base=10)
static QByteArray	number (qulonglong, int base=10)
static QByteArray	number (double, char f= 'g', int prec=6)
static QByteArray	fromRawData (const char *, int size)
static QByteArray	fromBase64 (const QByteArray &base64)
Private Member Functions
	operator QNoImplicitBoolCast () const
	QByteArray (Data *dd, int, int)
void	realloc (int alloc)
void	expand (int i)
Private Attributes
Data *	d
Static Private Attributes
static Data	shared_null
static Data	shared_empty
Friends
class	QByteRef
class	QString
Related Functions
(Note that these are not member functions.)
char *	qstrdup (const char *src)
char *	qstrcpy (char dst, const char src)
char *	qstrncpy (char dst, const char src, uint len)
uint	qstrlen (const char *str)
uint	qstrnlen (const char *str, uint maxlen)
int	qstrcmp (const char str1, const char str2)
int	qstrncmp (const char str1, const char str2, uint len)
int	qstricmp (const char str1, const char str2)
int	qstrnicmp (const char str1, const char str2, uint len)
quint16	qChecksum (const char *data, uint len)
QByteArray	qCompress (const QByteArray &data, int compressionLevel)
QByteArray	qCompress (const uchar *data, int nbytes, int compressionLevel)
QByteArray	qUncompress (const QByteArray &data)
QByteArray	qUncompress (const uchar *data, int nbytes)
QDataStream &	operator<< (QDataStream &out, const QByteArray &ba)
QDataStream &	operator>> (QDataStream &in, QByteArray &ba)
bool	operator== (const QByteArray &a1, const QByteArray &a2)
bool	operator== (const QByteArray &a1, const char *a2)
bool	operator== (const char *a1, const QByteArray &a2)
bool	operator!= (const QByteArray &a1, const QByteArray &a2)
bool	operator!= (const QByteArray &a1, const char *a2)
bool	operator!= (const char *a1, const QByteArray &a2)
bool	operator< (const QByteArray &a1, const QByteArray &a2)
bool	operator< (const QByteArray &a1, const char *a2)
bool	operator< (const char *a1, const QByteArray &a2)
bool	operator<= (const QByteArray &a1, const QByteArray &a2)
bool	operator<= (const QByteArray &a1, const char *a2)
bool	operator<= (const char *a1, const QByteArray &a2)
bool	operator> (const QByteArray &a1, const QByteArray &a2)
bool	operator> (const QByteArray &a1, const char *a2)
bool	operator> (const char *a1, const QByteArray &a2)
bool	operator>= (const QByteArray &a1, const QByteArray &a2)
bool	operator>= (const QByteArray &a1, const char *a2)
bool	operator>= (const char *a1, const QByteArray &a2)
const QByteArray	operator+ (const QByteArray &a1, const QByteArray &a2)
const QByteArray	operator+ (const QByteArray &a1, const char *a2)
const QByteArray	operator+ (const QByteArray &a1, char a2)
const QByteArray	operator+ (const char *a1, const QByteArray &a2)
const QByteArray	operator+ (char a1, const QByteArray &a2)
int	qvsnprintf (char str, size_t n, const char fmt, va_list ap)
int	qsnprintf (char str, size_t n, const char fmt,...)
Classes
struct	Data