diff options
author | Thiago Macieira <thiago.macieira@intel.com> | 2017-12-12 18:32:19 -0800 |
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committer | Thiago Macieira <thiago.macieira@intel.com> | 2018-01-26 20:59:50 +0000 |
commit | a6b697ca13945a174cff9f3e9b1af1cf61c0bea5 (patch) | |
tree | 78d5fad97ff8e89f079df29cc5a75b4e7197bfc7 /src/corelib/io/qtextstream.cpp | |
parent | 657894624521b580f59ff5f58b9c0e9be159dc1c (diff) |
Create corelib/serialization and move existing file formats into it
This is in preparation to adding CBOR support. We don't need yet another
dir for CBOR and placing it in src/corelib/json is just wrong.
Change-Id: I9741f017961b410c910dfffd14ffb9d870340fa6
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Diffstat (limited to 'src/corelib/io/qtextstream.cpp')
-rw-r--r-- | src/corelib/io/qtextstream.cpp | 3192 |
1 files changed, 0 insertions, 3192 deletions
diff --git a/src/corelib/io/qtextstream.cpp b/src/corelib/io/qtextstream.cpp deleted file mode 100644 index ee3cb4efcb..0000000000 --- a/src/corelib/io/qtextstream.cpp +++ /dev/null @@ -1,3192 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Copyright (C) 2016 Intel Corporation. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtCore module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -//#define QTEXTSTREAM_DEBUG -static const int QTEXTSTREAM_BUFFERSIZE = 16384; - -/*! - \class QTextStream - \inmodule QtCore - - \brief The QTextStream class provides a convenient interface for - reading and writing text. - - \ingroup io - \ingroup string-processing - \reentrant - - QTextStream can operate on a QIODevice, a QByteArray or a - QString. Using QTextStream's streaming operators, you can - conveniently read and write words, lines and numbers. For - generating text, QTextStream supports formatting options for field - padding and alignment, and formatting of numbers. Example: - - \snippet code/src_corelib_io_qtextstream.cpp 0 - - It's also common to use QTextStream to read console input and write - console output. QTextStream is locale aware, and will automatically decode - standard input using the correct codec. Example: - - \snippet code/src_corelib_io_qtextstream.cpp 1 - - Besides using QTextStream's constructors, you can also set the - device or string QTextStream operates on by calling setDevice() or - setString(). You can seek to a position by calling seek(), and - atEnd() will return true when there is no data left to be read. If - you call flush(), QTextStream will empty all data from its write - buffer into the device and call flush() on the device. - - Internally, QTextStream uses a Unicode based buffer, and - QTextCodec is used by QTextStream to automatically support - different character sets. By default, QTextCodec::codecForLocale() - is used for reading and writing, but you can also set the codec by - calling setCodec(). Automatic Unicode detection is also - supported. When this feature is enabled (the default behavior), - QTextStream will detect the UTF-16 or the UTF-32 BOM (Byte Order Mark) and - switch to the appropriate UTF codec when reading. QTextStream - does not write a BOM by default, but you can enable this by calling - setGenerateByteOrderMark(true). When QTextStream operates on a QString - directly, the codec is disabled. - - There are three general ways to use QTextStream when reading text - files: - - \list - - \li Chunk by chunk, by calling readLine() or readAll(). - - \li Word by word. QTextStream supports streaming into \l {QString}s, - \l {QByteArray}s and char* buffers. Words are delimited by space, and - leading white space is automatically skipped. - - \li Character by character, by streaming into QChar or char types. - This method is often used for convenient input handling when - parsing files, independent of character encoding and end-of-line - semantics. To skip white space, call skipWhiteSpace(). - - \endlist - - Since the text stream uses a buffer, you should not read from - the stream using the implementation of a superclass. For instance, - if you have a QFile and read from it directly using - QFile::readLine() instead of using the stream, the text stream's - internal position will be out of sync with the file's position. - - By default, when reading numbers from a stream of text, - QTextStream will automatically detect the number's base - representation. For example, if the number starts with "0x", it is - assumed to be in hexadecimal form. If it starts with the digits - 1-9, it is assumed to be in decimal form, and so on. You can set - the integer base, thereby disabling the automatic detection, by - calling setIntegerBase(). Example: - - \snippet code/src_corelib_io_qtextstream.cpp 2 - - QTextStream supports many formatting options for generating text. - You can set the field width and pad character by calling - setFieldWidth() and setPadChar(). Use setFieldAlignment() to set - the alignment within each field. For real numbers, call - setRealNumberNotation() and setRealNumberPrecision() to set the - notation (SmartNotation, ScientificNotation, FixedNotation) and precision in - digits of the generated number. Some extra number formatting - options are also available through setNumberFlags(). - - \target QTextStream manipulators - - Like \c <iostream> in the standard C++ library, QTextStream also - defines several global manipulator functions: - - \table - \header \li Manipulator \li Description - \row \li \c bin \li Same as setIntegerBase(2). - \row \li \c oct \li Same as setIntegerBase(8). - \row \li \c dec \li Same as setIntegerBase(10). - \row \li \c hex \li Same as setIntegerBase(16). - \row \li \c showbase \li Same as setNumberFlags(numberFlags() | ShowBase). - \row \li \c forcesign \li Same as setNumberFlags(numberFlags() | ForceSign). - \row \li \c forcepoint \li Same as setNumberFlags(numberFlags() | ForcePoint). - \row \li \c noshowbase \li Same as setNumberFlags(numberFlags() & ~ShowBase). - \row \li \c noforcesign \li Same as setNumberFlags(numberFlags() & ~ForceSign). - \row \li \c noforcepoint \li Same as setNumberFlags(numberFlags() & ~ForcePoint). - \row \li \c uppercasebase \li Same as setNumberFlags(numberFlags() | UppercaseBase). - \row \li \c uppercasedigits \li Same as setNumberFlags(numberFlags() | UppercaseDigits). - \row \li \c lowercasebase \li Same as setNumberFlags(numberFlags() & ~UppercaseBase). - \row \li \c lowercasedigits \li Same as setNumberFlags(numberFlags() & ~UppercaseDigits). - \row \li \c fixed \li Same as setRealNumberNotation(FixedNotation). - \row \li \c scientific \li Same as setRealNumberNotation(ScientificNotation). - \row \li \c left \li Same as setFieldAlignment(AlignLeft). - \row \li \c right \li Same as setFieldAlignment(AlignRight). - \row \li \c center \li Same as setFieldAlignment(AlignCenter). - \row \li \c endl \li Same as operator<<('\\n') and flush(). - \row \li \c flush \li Same as flush(). - \row \li \c reset \li Same as reset(). - \row \li \c ws \li Same as skipWhiteSpace(). - \row \li \c bom \li Same as setGenerateByteOrderMark(true). - \endtable - - In addition, Qt provides three global manipulators that take a - parameter: qSetFieldWidth(), qSetPadChar(), and - qSetRealNumberPrecision(). - - \sa QDataStream, QIODevice, QFile, QBuffer, QTcpSocket, {Text Codecs Example} -*/ - -/*! \enum QTextStream::RealNumberNotation - - This enum specifies which notations to use for expressing \c - float and \c double as strings. - - \value ScientificNotation Scientific notation (\c{printf()}'s \c %e flag). - \value FixedNotation Fixed-point notation (\c{printf()}'s \c %f flag). - \value SmartNotation Scientific or fixed-point notation, depending on which makes most sense (\c{printf()}'s \c %g flag). - - \sa setRealNumberNotation() -*/ - -/*! \enum QTextStream::FieldAlignment - - This enum specifies how to align text in fields when the field is - wider than the text that occupies it. - - \value AlignLeft Pad on the right side of fields. - \value AlignRight Pad on the left side of fields. - \value AlignCenter Pad on both sides of field. - \value AlignAccountingStyle Same as AlignRight, except that the - sign of a number is flush left. - - \sa setFieldAlignment() -*/ - -/*! \enum QTextStream::NumberFlag - - This enum specifies various flags that can be set to affect the - output of integers, \c{float}s, and \c{double}s. - - \value ShowBase Show the base as a prefix if the base - is 16 ("0x"), 8 ("0"), or 2 ("0b"). - \value ForcePoint Always put the decimal separator in numbers, even if - there are no decimals. - \value ForceSign Always put the sign in numbers, even for positive numbers. - \value UppercaseBase Use uppercase versions of base prefixes ("0X", "0B"). - \value UppercaseDigits Use uppercase letters for expressing - digits 10 to 35 instead of lowercase. - - \sa setNumberFlags() -*/ - -/*! \enum QTextStream::Status - - This enum describes the current status of the text stream. - - \value Ok The text stream is operating normally. - \value ReadPastEnd The text stream has read past the end of the - data in the underlying device. - \value ReadCorruptData The text stream has read corrupt data. - \value WriteFailed The text stream cannot write to the underlying device. - - \sa status() -*/ - -#include "qtextstream.h" -#include "private/qtextstream_p.h" -#include "qbuffer.h" -#include "qfile.h" -#include "qnumeric.h" -#include "qvarlengtharray.h" - -#include <locale.h> -#include "private/qlocale_p.h" - -#include <stdlib.h> -#include <limits.h> -#include <new> - -#if defined QTEXTSTREAM_DEBUG -#include <ctype.h> -#include "private/qtools_p.h" - -QT_BEGIN_NAMESPACE - -// Returns a human readable representation of the first \a len -// characters in \a data. -static QByteArray qt_prettyDebug(const char *data, int len, int maxSize) -{ - if (!data) return "(null)"; - QByteArray out; - for (int i = 0; i < len; ++i) { - char c = data[i]; - if (isprint(int(uchar(c)))) { - out += c; - } else switch (c) { - case '\n': out += "\\n"; break; - case '\r': out += "\\r"; break; - case '\t': out += "\\t"; break; - default: { - const char buf[] = { - '\\', - 'x', - QtMiscUtils::toHexLower(uchar(c) / 16), - QtMiscUtils::toHexLower(uchar(c) % 16), - 0 - }; - out += buf; - } - } - } - - if (len < maxSize) - out += "..."; - - return out; -} -QT_END_NAMESPACE - -#endif - -// A precondition macro -#define Q_VOID -#define CHECK_VALID_STREAM(x) do { \ - if (!d->string && !d->device) { \ - qWarning("QTextStream: No device"); \ - return x; \ - } } while (0) - -// Base implementations of operator>> for ints and reals -#define IMPLEMENT_STREAM_RIGHT_INT_OPERATOR(type) do { \ - Q_D(QTextStream); \ - CHECK_VALID_STREAM(*this); \ - qulonglong tmp; \ - switch (d->getNumber(&tmp)) { \ - case QTextStreamPrivate::npsOk: \ - i = (type)tmp; \ - break; \ - case QTextStreamPrivate::npsMissingDigit: \ - case QTextStreamPrivate::npsInvalidPrefix: \ - i = (type)0; \ - setStatus(atEnd() ? QTextStream::ReadPastEnd : QTextStream::ReadCorruptData); \ - break; \ - } \ - return *this; } while (0) - -#define IMPLEMENT_STREAM_RIGHT_REAL_OPERATOR(type) do { \ - Q_D(QTextStream); \ - CHECK_VALID_STREAM(*this); \ - double tmp; \ - if (d->getReal(&tmp)) { \ - f = (type)tmp; \ - } else { \ - f = (type)0; \ - setStatus(atEnd() ? QTextStream::ReadPastEnd : QTextStream::ReadCorruptData); \ - } \ - return *this; } while (0) - -QT_BEGIN_NAMESPACE - -//------------------------------------------------------------------- - -/*! - \internal -*/ -QTextStreamPrivate::QTextStreamPrivate(QTextStream *q_ptr) - : -#ifndef QT_NO_TEXTCODEC - readConverterSavedState(0), -#endif - readConverterSavedStateOffset(0), - locale(QLocale::c()) -{ - this->q_ptr = q_ptr; - reset(); -} - -/*! - \internal -*/ -QTextStreamPrivate::~QTextStreamPrivate() -{ - if (deleteDevice) { -#ifndef QT_NO_QOBJECT - device->blockSignals(true); -#endif - delete device; - } -#ifndef QT_NO_TEXTCODEC - delete readConverterSavedState; -#endif -} - -#ifndef QT_NO_TEXTCODEC -static void resetCodecConverterStateHelper(QTextCodec::ConverterState *state) -{ - state->~ConverterState(); - new (state) QTextCodec::ConverterState; -} - -static void copyConverterStateHelper(QTextCodec::ConverterState *dest, - const QTextCodec::ConverterState *src) -{ - // ### QTextCodec::ConverterState's copy constructors and assignments are - // private. This function copies the structure manually. - Q_ASSERT(!src->d); - dest->flags = src->flags; - dest->invalidChars = src->invalidChars; - dest->state_data[0] = src->state_data[0]; - dest->state_data[1] = src->state_data[1]; - dest->state_data[2] = src->state_data[2]; -} -#endif - -void QTextStreamPrivate::Params::reset() -{ - realNumberPrecision = 6; - integerBase = 0; - fieldWidth = 0; - padChar = QLatin1Char(' '); - fieldAlignment = QTextStream::AlignRight; - realNumberNotation = QTextStream::SmartNotation; - numberFlags = 0; -} - -/*! - \internal -*/ -void QTextStreamPrivate::reset() -{ - params.reset(); - - device = 0; - deleteDevice = false; - string = 0; - stringOffset = 0; - stringOpenMode = QIODevice::NotOpen; - - readBufferOffset = 0; - readBufferStartDevicePos = 0; - lastTokenSize = 0; - -#ifndef QT_NO_TEXTCODEC - codec = QTextCodec::codecForLocale(); - resetCodecConverterStateHelper(&readConverterState); - resetCodecConverterStateHelper(&writeConverterState); - delete readConverterSavedState; - readConverterSavedState = 0; - writeConverterState.flags |= QTextCodec::IgnoreHeader; - autoDetectUnicode = true; -#endif -} - -/*! - \internal -*/ -bool QTextStreamPrivate::fillReadBuffer(qint64 maxBytes) -{ - // no buffer next to the QString itself; this function should only - // be called internally, for devices. - Q_ASSERT(!string); - Q_ASSERT(device); - - // handle text translation and bypass the Text flag in the device. - bool textModeEnabled = device->isTextModeEnabled(); - if (textModeEnabled) - device->setTextModeEnabled(false); - - // read raw data into a temporary buffer - char buf[QTEXTSTREAM_BUFFERSIZE]; - qint64 bytesRead = 0; -#if defined(Q_OS_WIN) - // On Windows, there is no non-blocking stdin - so we fall back to reading - // lines instead. If there is no QOBJECT, we read lines for all sequential - // devices; otherwise, we read lines only for stdin. - QFile *file = 0; - Q_UNUSED(file); - if (device->isSequential() -#if !defined(QT_NO_QOBJECT) - && (file = qobject_cast<QFile *>(device)) && file->handle() == 0 -#endif - ) { - if (maxBytes != -1) - bytesRead = device->readLine(buf, qMin<qint64>(sizeof(buf), maxBytes)); - else - bytesRead = device->readLine(buf, sizeof(buf)); - } else -#endif - { - if (maxBytes != -1) - bytesRead = device->read(buf, qMin<qint64>(sizeof(buf), maxBytes)); - else - bytesRead = device->read(buf, sizeof(buf)); - } - - // reset the Text flag. - if (textModeEnabled) - device->setTextModeEnabled(true); - - if (bytesRead <= 0) - return false; - -#ifndef QT_NO_TEXTCODEC - // codec auto detection, explicitly defaults to locale encoding if the - // codec has been set to 0. - if (!codec || autoDetectUnicode) { - autoDetectUnicode = false; - - codec = QTextCodec::codecForUtfText(QByteArray::fromRawData(buf, bytesRead), codec); - if (!codec) { - codec = QTextCodec::codecForLocale(); - writeConverterState.flags |= QTextCodec::IgnoreHeader; - } - } -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStreamPrivate::fillReadBuffer(), using %s codec", - codec ? codec->name().constData() : "no"); -#endif -#endif - -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStreamPrivate::fillReadBuffer(), device->read(\"%s\", %d) == %d", - qt_prettyDebug(buf, qMin(32,int(bytesRead)) , int(bytesRead)).constData(), int(sizeof(buf)), int(bytesRead)); -#endif - - int oldReadBufferSize = readBuffer.size(); -#ifndef QT_NO_TEXTCODEC - // convert to unicode - readBuffer += Q_LIKELY(codec) ? codec->toUnicode(buf, bytesRead, &readConverterState) - : QString::fromLatin1(buf, bytesRead); -#else - readBuffer += QString::fromLatin1(buf, bytesRead); -#endif - - // remove all '\r\n' in the string. - if (readBuffer.size() > oldReadBufferSize && textModeEnabled) { - QChar CR = QLatin1Char('\r'); - QChar *writePtr = readBuffer.data() + oldReadBufferSize; - QChar *readPtr = readBuffer.data() + oldReadBufferSize; - QChar *endPtr = readBuffer.data() + readBuffer.size(); - - int n = oldReadBufferSize; - if (readPtr < endPtr) { - // Cut-off to avoid unnecessary self-copying. - while (*readPtr++ != CR) { - ++n; - if (++writePtr == endPtr) - break; - } - } - while (readPtr < endPtr) { - QChar ch = *readPtr++; - if (ch != CR) { - *writePtr++ = ch; - } else { - if (n < readBufferOffset) - --readBufferOffset; - --bytesRead; - } - ++n; - } - readBuffer.resize(writePtr - readBuffer.data()); - } - -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStreamPrivate::fillReadBuffer() read %d bytes from device. readBuffer = [%s]", int(bytesRead), - qt_prettyDebug(readBuffer.toLatin1(), readBuffer.size(), readBuffer.size()).data()); -#endif - return true; -} - -/*! - \internal -*/ -void QTextStreamPrivate::resetReadBuffer() -{ - readBuffer.clear(); - readBufferOffset = 0; - readBufferStartDevicePos = (device ? device->pos() : 0); -} - -/*! - \internal -*/ -void QTextStreamPrivate::flushWriteBuffer() -{ - // no buffer next to the QString itself; this function should only - // be called internally, for devices. - if (string || !device) - return; - - // Stream went bye-bye already. Appending further data may succeed again, - // but would create a corrupted stream anyway. - if (status != QTextStream::Ok) - return; - - if (writeBuffer.isEmpty()) - return; - -#if defined (Q_OS_WIN) - // handle text translation and bypass the Text flag in the device. - bool textModeEnabled = device->isTextModeEnabled(); - if (textModeEnabled) { - device->setTextModeEnabled(false); - writeBuffer.replace(QLatin1Char('\n'), QLatin1String("\r\n")); - } -#endif - -#ifndef QT_NO_TEXTCODEC - if (!codec) - codec = QTextCodec::codecForLocale(); -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStreamPrivate::flushWriteBuffer(), using %s codec (%s generating BOM)", - codec ? codec->name().constData() : "no", - !codec || (writeConverterState.flags & QTextCodec::IgnoreHeader) ? "not" : ""); -#endif - - // convert from unicode to raw data - // codec might be null if we're already inside global destructors (QTestCodec::codecForLocale returned null) - QByteArray data = Q_LIKELY(codec) ? codec->fromUnicode(writeBuffer.data(), writeBuffer.size(), &writeConverterState) - : writeBuffer.toLatin1(); -#else - QByteArray data = writeBuffer.toLatin1(); -#endif - writeBuffer.clear(); - - // write raw data to the device - qint64 bytesWritten = device->write(data); -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStreamPrivate::flushWriteBuffer(), device->write(\"%s\") == %d", - qt_prettyDebug(data.constData(), qMin(data.size(),32), data.size()).constData(), int(bytesWritten)); -#endif - -#if defined (Q_OS_WIN) - // reset the text flag - if (textModeEnabled) - device->setTextModeEnabled(true); -#endif - - if (bytesWritten <= 0) { - status = QTextStream::WriteFailed; - return; - } - - // flush the file -#ifndef QT_NO_QOBJECT - QFileDevice *file = qobject_cast<QFileDevice *>(device); - bool flushed = !file || file->flush(); -#else - bool flushed = true; -#endif - -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStreamPrivate::flushWriteBuffer() wrote %d bytes", - int(bytesWritten)); -#endif - if (!flushed || bytesWritten != qint64(data.size())) - status = QTextStream::WriteFailed; -} - -QString QTextStreamPrivate::read(int maxlen) -{ - QString ret; - if (string) { - lastTokenSize = qMin(maxlen, string->size() - stringOffset); - ret = string->mid(stringOffset, lastTokenSize); - } else { - while (readBuffer.size() - readBufferOffset < maxlen && fillReadBuffer()) ; - lastTokenSize = qMin(maxlen, readBuffer.size() - readBufferOffset); - ret = readBuffer.mid(readBufferOffset, lastTokenSize); - } - consumeLastToken(); - -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStreamPrivate::read() maxlen = %d, token length = %d", maxlen, ret.length()); -#endif - return ret; -} - -/*! - \internal - - Scans no more than \a maxlen QChars in the current buffer for the - first \a delimiter. Stores a pointer to the start offset of the - token in \a ptr, and the length in QChars in \a length. -*/ -bool QTextStreamPrivate::scan(const QChar **ptr, int *length, int maxlen, TokenDelimiter delimiter) -{ - int totalSize = 0; - int delimSize = 0; - bool consumeDelimiter = false; - bool foundToken = false; - int startOffset = device ? readBufferOffset : stringOffset; - QChar lastChar; - - bool canStillReadFromDevice = true; - do { - int endOffset; - const QChar *chPtr; - if (device) { - chPtr = readBuffer.constData(); - endOffset = readBuffer.size(); - } else { - chPtr = string->constData(); - endOffset = string->size(); - } - chPtr += startOffset; - - for (; !foundToken && startOffset < endOffset && (!maxlen || totalSize < maxlen); ++startOffset) { - const QChar ch = *chPtr++; - ++totalSize; - - switch (delimiter) { - case Space: - if (ch.isSpace()) { - foundToken = true; - delimSize = 1; - } - break; - case NotSpace: - if (!ch.isSpace()) { - foundToken = true; - delimSize = 1; - } - break; - case EndOfLine: - if (ch == QLatin1Char('\n')) { - foundToken = true; - delimSize = (lastChar == QLatin1Char('\r')) ? 2 : 1; - consumeDelimiter = true; - } - lastChar = ch; - break; - } - } - } while (!foundToken - && (!maxlen || totalSize < maxlen) - && (device && (canStillReadFromDevice = fillReadBuffer()))); - - if (totalSize == 0) { -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStreamPrivate::scan() reached the end of input."); -#endif - return false; - } - - // if we find a '\r' at the end of the data when reading lines, - // don't make it part of the line. - if (delimiter == EndOfLine && totalSize > 0 && !foundToken) { - if (((string && stringOffset + totalSize == string->size()) || (device && device->atEnd())) - && lastChar == QLatin1Char('\r')) { - consumeDelimiter = true; - ++delimSize; - } - } - - // set the read offset and length of the token - if (length) - *length = totalSize - delimSize; - if (ptr) - *ptr = readPtr(); - - // update last token size. the callee will call consumeLastToken() when - // done. - lastTokenSize = totalSize; - if (!consumeDelimiter) - lastTokenSize -= delimSize; - -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStreamPrivate::scan(%p, %p, %d, %x) token length = %d, delimiter = %d", - ptr, length, maxlen, (int)delimiter, totalSize - delimSize, delimSize); -#endif - return true; -} - -/*! - \internal -*/ -inline const QChar *QTextStreamPrivate::readPtr() const -{ - Q_ASSERT(readBufferOffset <= readBuffer.size()); - if (string) - return string->constData() + stringOffset; - return readBuffer.constData() + readBufferOffset; -} - -/*! - \internal -*/ -inline void QTextStreamPrivate::consumeLastToken() -{ - if (lastTokenSize) - consume(lastTokenSize); - lastTokenSize = 0; -} - -/*! - \internal -*/ -inline void QTextStreamPrivate::consume(int size) -{ -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStreamPrivate::consume(%d)", size); -#endif - if (string) { - stringOffset += size; - if (stringOffset > string->size()) - stringOffset = string->size(); - } else { - readBufferOffset += size; - if (readBufferOffset >= readBuffer.size()) { - readBufferOffset = 0; - readBuffer.clear(); - saveConverterState(device->pos()); - } else if (readBufferOffset > QTEXTSTREAM_BUFFERSIZE) { - readBuffer = readBuffer.remove(0,readBufferOffset); - readConverterSavedStateOffset += readBufferOffset; - readBufferOffset = 0; - } - } -} - -/*! - \internal -*/ -inline void QTextStreamPrivate::saveConverterState(qint64 newPos) -{ -#ifndef QT_NO_TEXTCODEC - if (readConverterState.d) { - // converter cannot be copied, so don't save anything - // don't update readBufferStartDevicePos either - return; - } - - if (!readConverterSavedState) - readConverterSavedState = new QTextCodec::ConverterState; - copyConverterStateHelper(readConverterSavedState, &readConverterState); -#endif - - readBufferStartDevicePos = newPos; - readConverterSavedStateOffset = 0; -} - -/*! - \internal -*/ -inline void QTextStreamPrivate::restoreToSavedConverterState() -{ -#ifndef QT_NO_TEXTCODEC - if (readConverterSavedState) { - // we have a saved state - // that means the converter can be copied - copyConverterStateHelper(&readConverterState, readConverterSavedState); - } else { - // the only state we could save was the initial - // so reset to that - resetCodecConverterStateHelper(&readConverterState); - } -#endif -} - -/*! - \internal -*/ -void QTextStreamPrivate::write(const QChar *data, int len) -{ - if (string) { - // ### What about seek()?? - string->append(data, len); - } else { - writeBuffer.append(data, len); - if (writeBuffer.size() > QTEXTSTREAM_BUFFERSIZE) - flushWriteBuffer(); - } -} - -/*! - \internal -*/ -inline void QTextStreamPrivate::write(QChar ch) -{ - if (string) { - // ### What about seek()?? - string->append(ch); - } else { - writeBuffer += ch; - if (writeBuffer.size() > QTEXTSTREAM_BUFFERSIZE) - flushWriteBuffer(); - } -} - -/*! - \internal -*/ -void QTextStreamPrivate::write(QLatin1String data) -{ - if (string) { - // ### What about seek()?? - string->append(data); - } else { - writeBuffer += data; - if (writeBuffer.size() > QTEXTSTREAM_BUFFERSIZE) - flushWriteBuffer(); - } -} - -/*! - \internal -*/ -void QTextStreamPrivate::writePadding(int len) -{ - if (string) { - // ### What about seek()?? - string->resize(string->size() + len, params.padChar); - } else { - writeBuffer.resize(writeBuffer.size() + len, params.padChar); - if (writeBuffer.size() > QTEXTSTREAM_BUFFERSIZE) - flushWriteBuffer(); - } -} - -/*! - \internal -*/ -inline bool QTextStreamPrivate::getChar(QChar *ch) -{ - if ((string && stringOffset == string->size()) - || (device && readBuffer.isEmpty() && !fillReadBuffer())) { - if (ch) - *ch = 0; - return false; - } - if (ch) - *ch = *readPtr(); - consume(1); - return true; -} - -/*! - \internal -*/ -inline void QTextStreamPrivate::ungetChar(QChar ch) -{ - if (string) { - if (stringOffset == 0) - string->prepend(ch); - else - (*string)[--stringOffset] = ch; - return; - } - - if (readBufferOffset == 0) { - readBuffer.prepend(ch); - return; - } - - readBuffer[--readBufferOffset] = ch; -} - -/*! - \internal -*/ -inline void QTextStreamPrivate::putChar(QChar ch) -{ - if (params.fieldWidth > 0) - putString(&ch, 1); - else - write(ch); -} - - -/*! - \internal -*/ -QTextStreamPrivate::PaddingResult QTextStreamPrivate::padding(int len) const -{ - Q_ASSERT(params.fieldWidth > len); // calling padding() when no padding is needed is an error - - int left = 0, right = 0; - - const int padSize = params.fieldWidth - len; - - switch (params.fieldAlignment) { - case QTextStream::AlignLeft: - right = padSize; - break; - case QTextStream::AlignRight: - case QTextStream::AlignAccountingStyle: - left = padSize; - break; - case QTextStream::AlignCenter: - left = padSize/2; - right = padSize - padSize/2; - break; - } - return { left, right }; -} - -/*! - \internal -*/ -void QTextStreamPrivate::putString(const QChar *data, int len, bool number) -{ - if (Q_UNLIKELY(params.fieldWidth > len)) { - - // handle padding: - - const PaddingResult pad = padding(len); - - if (params.fieldAlignment == QTextStream::AlignAccountingStyle && number) { - const QChar sign = len > 0 ? data[0] : QChar(); - if (sign == locale.negativeSign() || sign == locale.positiveSign()) { - // write the sign before the padding, then skip it later - write(&sign, 1); - ++data; - --len; - } - } - - writePadding(pad.left); - write(data, len); - writePadding(pad.right); - } else { - write(data, len); - } -} - -/*! - \internal -*/ -void QTextStreamPrivate::putString(QLatin1String data, bool number) -{ - if (Q_UNLIKELY(params.fieldWidth > data.size())) { - - // handle padding - - const PaddingResult pad = padding(data.size()); - - if (params.fieldAlignment == QTextStream::AlignAccountingStyle && number) { - const QChar sign = data.size() > 0 ? QLatin1Char(*data.data()) : QChar(); - if (sign == locale.negativeSign() || sign == locale.positiveSign()) { - // write the sign before the padding, then skip it later - write(&sign, 1); - data = QLatin1String(data.data() + 1, data.size() - 1); - } - } - - writePadding(pad.left); - write(data); - writePadding(pad.right); - } else { - write(data); - } -} - -/*! - Constructs a QTextStream. Before you can use it for reading or - writing, you must assign a device or a string. - - \sa setDevice(), setString() -*/ -QTextStream::QTextStream() - : d_ptr(new QTextStreamPrivate(this)) -{ -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStream::QTextStream()"); -#endif - Q_D(QTextStream); - d->status = Ok; -} - -/*! - Constructs a QTextStream that operates on \a device. -*/ -QTextStream::QTextStream(QIODevice *device) - : d_ptr(new QTextStreamPrivate(this)) -{ -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStream::QTextStream(QIODevice *device == *%p)", - device); -#endif - Q_D(QTextStream); - d->device = device; -#ifndef QT_NO_QOBJECT - d->deviceClosedNotifier.setupDevice(this, d->device); -#endif - d->status = Ok; -} - -/*! - Constructs a QTextStream that operates on \a string, using \a - openMode to define the open mode. -*/ -QTextStream::QTextStream(QString *string, QIODevice::OpenMode openMode) - : d_ptr(new QTextStreamPrivate(this)) -{ -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStream::QTextStream(QString *string == *%p, openMode = %d)", - string, int(openMode)); -#endif - Q_D(QTextStream); - d->string = string; - d->stringOpenMode = openMode; - d->status = Ok; -} - -/*! - Constructs a QTextStream that operates on \a array, using \a - openMode to define the open mode. Internally, the array is wrapped - by a QBuffer. -*/ -QTextStream::QTextStream(QByteArray *array, QIODevice::OpenMode openMode) - : d_ptr(new QTextStreamPrivate(this)) -{ -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStream::QTextStream(QByteArray *array == *%p, openMode = %d)", - array, int(openMode)); -#endif - Q_D(QTextStream); - d->device = new QBuffer(array); - d->device->open(openMode); - d->deleteDevice = true; -#ifndef QT_NO_QOBJECT - d->deviceClosedNotifier.setupDevice(this, d->device); -#endif - d->status = Ok; -} - -/*! - Constructs a QTextStream that operates on \a array, using \a - openMode to define the open mode. The array is accessed as - read-only, regardless of the values in \a openMode. - - This constructor is convenient for working on constant - strings. Example: - - \snippet code/src_corelib_io_qtextstream.cpp 3 -*/ -QTextStream::QTextStream(const QByteArray &array, QIODevice::OpenMode openMode) - : d_ptr(new QTextStreamPrivate(this)) -{ -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStream::QTextStream(const QByteArray &array == *(%p), openMode = %d)", - &array, int(openMode)); -#endif - QBuffer *buffer = new QBuffer; - buffer->setData(array); - buffer->open(openMode); - - Q_D(QTextStream); - d->device = buffer; - d->deleteDevice = true; -#ifndef QT_NO_QOBJECT - d->deviceClosedNotifier.setupDevice(this, d->device); -#endif - d->status = Ok; -} - -/*! - Constructs a QTextStream that operates on \a fileHandle, using \a - openMode to define the open mode. Internally, a QFile is created - to handle the FILE pointer. - - This constructor is useful for working directly with the common - FILE based input and output streams: stdin, stdout and stderr. Example: - - \snippet code/src_corelib_io_qtextstream.cpp 4 -*/ - -QTextStream::QTextStream(FILE *fileHandle, QIODevice::OpenMode openMode) - : d_ptr(new QTextStreamPrivate(this)) -{ -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStream::QTextStream(FILE *fileHandle = %p, openMode = %d)", - fileHandle, int(openMode)); -#endif - QFile *file = new QFile; - file->open(fileHandle, openMode); - - Q_D(QTextStream); - d->device = file; - d->deleteDevice = true; -#ifndef QT_NO_QOBJECT - d->deviceClosedNotifier.setupDevice(this, d->device); -#endif - d->status = Ok; -} - -/*! - Destroys the QTextStream. - - If the stream operates on a device, flush() will be called - implicitly. Otherwise, the device is unaffected. -*/ -QTextStream::~QTextStream() -{ - Q_D(QTextStream); -#if defined (QTEXTSTREAM_DEBUG) - qDebug("QTextStream::~QTextStream()"); -#endif - if (!d->writeBuffer.isEmpty()) - d->flushWriteBuffer(); -} - -/*! - Resets QTextStream's formatting options, bringing it back to its - original constructed state. The device, string and any buffered - data is left untouched. -*/ -void QTextStream::reset() -{ - Q_D(QTextStream); - - d->params.reset(); -} - -/*! - Flushes any buffered data waiting to be written to the device. - - If QTextStream operates on a string, this function does nothing. -*/ -void QTextStream::flush() -{ - Q_D(QTextStream); - d->flushWriteBuffer(); -} - -/*! - Seeks to the position \a pos in the device. Returns \c true on - success; otherwise returns \c false. -*/ -bool QTextStream::seek(qint64 pos) -{ - Q_D(QTextStream); - d->lastTokenSize = 0; - - if (d->device) { - // Empty the write buffer - d->flushWriteBuffer(); - if (!d->device->seek(pos)) - return false; - d->resetReadBuffer(); - -#ifndef QT_NO_TEXTCODEC - // Reset the codec converter states. - resetCodecConverterStateHelper(&d->readConverterState); - resetCodecConverterStateHelper(&d->writeConverterState); - delete d->readConverterSavedState; - d->readConverterSavedState = 0; - d->writeConverterState.flags |= QTextCodec::IgnoreHeader; -#endif - return true; - } - - // string - if (d->string && pos <= d->string->size()) { - d->stringOffset = int(pos); - return true; - } - return false; -} - -/*! - \since 4.2 - - Returns the device position corresponding to the current position of the - stream, or -1 if an error occurs (e.g., if there is no device or string, - or if there's a device error). - - Because QTextStream is buffered, this function may have to - seek the device to reconstruct a valid device position. This - operation can be expensive, so you may want to avoid calling this - function in a tight loop. - - \sa seek() -*/ -qint64 QTextStream::pos() const -{ - Q_D(const QTextStream); - if (d->device) { - // Cutoff - if (d->readBuffer.isEmpty()) - return d->device->pos(); - if (d->device->isSequential()) - return 0; - - // Seek the device - if (!d->device->seek(d->readBufferStartDevicePos)) - return qint64(-1); - - // Reset the read buffer - QTextStreamPrivate *thatd = const_cast<QTextStreamPrivate *>(d); - thatd->readBuffer.clear(); - -#ifndef QT_NO_TEXTCODEC - thatd->restoreToSavedConverterState(); - if (d->readBufferStartDevicePos == 0) - thatd->autoDetectUnicode = true; -#endif - - // Rewind the device to get to the current position Ensure that - // readBufferOffset is unaffected by fillReadBuffer() - int oldReadBufferOffset = d->readBufferOffset + d->readConverterSavedStateOffset; - while (d->readBuffer.size() < oldReadBufferOffset) { - if (!thatd->fillReadBuffer(1)) - return qint64(-1); - } - thatd->readBufferOffset = oldReadBufferOffset; - thatd->readConverterSavedStateOffset = 0; - - // Return the device position. - return d->device->pos(); - } - - if (d->string) - return d->stringOffset; - - qWarning("QTextStream::pos: no device"); - return qint64(-1); -} - -/*! - Reads and discards whitespace from the stream until either a - non-space character is detected, or until atEnd() returns - true. This function is useful when reading a stream character by - character. - - Whitespace characters are all characters for which - QChar::isSpace() returns \c true. - - \sa operator>>() -*/ -void QTextStream::skipWhiteSpace() -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(Q_VOID); - d->scan(0, 0, 0, QTextStreamPrivate::NotSpace); - d->consumeLastToken(); -} - -/*! - Sets the current device to \a device. If a device has already been - assigned, QTextStream will call flush() before the old device is - replaced. - - \note This function resets locale to the default locale ('C') - and codec to the default codec, QTextCodec::codecForLocale(). - - \sa device(), setString() -*/ -void QTextStream::setDevice(QIODevice *device) -{ - Q_D(QTextStream); - flush(); - if (d->deleteDevice) { -#ifndef QT_NO_QOBJECT - d->deviceClosedNotifier.disconnect(); -#endif - delete d->device; - d->deleteDevice = false; - } - - d->reset(); - d->status = Ok; - d->device = device; - d->resetReadBuffer(); -#ifndef QT_NO_QOBJECT - d->deviceClosedNotifier.setupDevice(this, d->device); -#endif -} - -/*! - Returns the current device associated with the QTextStream, - or 0 if no device has been assigned. - - \sa setDevice(), string() -*/ -QIODevice *QTextStream::device() const -{ - Q_D(const QTextStream); - return d->device; -} - -/*! - Sets the current string to \a string, using the given \a - openMode. If a device has already been assigned, QTextStream will - call flush() before replacing it. - - \sa string(), setDevice() -*/ -void QTextStream::setString(QString *string, QIODevice::OpenMode openMode) -{ - Q_D(QTextStream); - flush(); - if (d->deleteDevice) { -#ifndef QT_NO_QOBJECT - d->deviceClosedNotifier.disconnect(); - d->device->blockSignals(true); -#endif - delete d->device; - d->deleteDevice = false; - } - - d->reset(); - d->status = Ok; - d->string = string; - d->stringOpenMode = openMode; -} - -/*! - Returns the current string assigned to the QTextStream, or 0 if no - string has been assigned. - - \sa setString(), device() -*/ -QString *QTextStream::string() const -{ - Q_D(const QTextStream); - return d->string; -} - -/*! - Sets the field alignment to \a mode. When used together with - setFieldWidth(), this function allows you to generate formatted - output with text aligned to the left, to the right or center - aligned. - - \sa fieldAlignment(), setFieldWidth() -*/ -void QTextStream::setFieldAlignment(FieldAlignment mode) -{ - Q_D(QTextStream); - d->params.fieldAlignment = mode; -} - -/*! - Returns the current field alignment. - - \sa setFieldAlignment(), fieldWidth() -*/ -QTextStream::FieldAlignment QTextStream::fieldAlignment() const -{ - Q_D(const QTextStream); - return d->params.fieldAlignment; -} - -/*! - Sets the pad character to \a ch. The default value is the ASCII - space character (' '), or QChar(0x20). This character is used to - fill in the space in fields when generating text. - - Example: - - \snippet code/src_corelib_io_qtextstream.cpp 5 - - The string \c s contains: - - \snippet code/src_corelib_io_qtextstream.cpp 6 - - \sa padChar(), setFieldWidth() -*/ -void QTextStream::setPadChar(QChar ch) -{ - Q_D(QTextStream); - d->params.padChar = ch; -} - -/*! - Returns the current pad character. - - \sa setPadChar(), setFieldWidth() -*/ -QChar QTextStream::padChar() const -{ - Q_D(const QTextStream); - return d->params.padChar; -} - -/*! - Sets the current field width to \a width. If \a width is 0 (the - default), the field width is equal to the length of the generated - text. - - \note The field width applies to every element appended to this - stream after this function has been called (e.g., it also pads - endl). This behavior is different from similar classes in the STL, - where the field width only applies to the next element. - - \sa fieldWidth(), setPadChar() -*/ -void QTextStream::setFieldWidth(int width) -{ - Q_D(QTextStream); - d->params.fieldWidth = width; -} - -/*! - Returns the current field width. - - \sa setFieldWidth() -*/ -int QTextStream::fieldWidth() const -{ - Q_D(const QTextStream); - return d->params.fieldWidth; -} - -/*! - Sets the current number flags to \a flags. \a flags is a set of - flags from the NumberFlag enum, and describes options for - formatting generated code (e.g., whether or not to always write - the base or sign of a number). - - \sa numberFlags(), setIntegerBase(), setRealNumberNotation() -*/ -void QTextStream::setNumberFlags(NumberFlags flags) -{ - Q_D(QTextStream); - d->params.numberFlags = flags; -} - -/*! - Returns the current number flags. - - \sa setNumberFlags(), integerBase(), realNumberNotation() -*/ -QTextStream::NumberFlags QTextStream::numberFlags() const -{ - Q_D(const QTextStream); - return d->params.numberFlags; -} - -/*! - Sets the base of integers to \a base, both for reading and for - generating numbers. \a base can be either 2 (binary), 8 (octal), - 10 (decimal) or 16 (hexadecimal). If \a base is 0, QTextStream - will attempt to detect the base by inspecting the data on the - stream. When generating numbers, QTextStream assumes base is 10 - unless the base has been set explicitly. - - \sa integerBase(), QString::number(), setNumberFlags() -*/ -void QTextStream::setIntegerBase(int base) -{ - Q_D(QTextStream); - d->params.integerBase = base; -} - -/*! - Returns the current base of integers. 0 means that the base is - detected when reading, or 10 (decimal) when generating numbers. - - \sa setIntegerBase(), QString::number(), numberFlags() -*/ -int QTextStream::integerBase() const -{ - Q_D(const QTextStream); - return d->params.integerBase; -} - -/*! - Sets the real number notation to \a notation (SmartNotation, - FixedNotation, ScientificNotation). When reading and generating - numbers, QTextStream uses this value to detect the formatting of - real numbers. - - \sa realNumberNotation(), setRealNumberPrecision(), setNumberFlags(), setIntegerBase() -*/ -void QTextStream::setRealNumberNotation(RealNumberNotation notation) -{ - Q_D(QTextStream); - d->params.realNumberNotation = notation; -} - -/*! - Returns the current real number notation. - - \sa setRealNumberNotation(), realNumberPrecision(), numberFlags(), integerBase() -*/ -QTextStream::RealNumberNotation QTextStream::realNumberNotation() const -{ - Q_D(const QTextStream); - return d->params.realNumberNotation; -} - -/*! - Sets the precision of real numbers to \a precision. This value - describes the number of fraction digits QTextStream should - write when generating real numbers. - - The precision cannot be a negative value. The default value is 6. - - \sa realNumberPrecision(), setRealNumberNotation() -*/ -void QTextStream::setRealNumberPrecision(int precision) -{ - Q_D(QTextStream); - if (precision < 0) { - qWarning("QTextStream::setRealNumberPrecision: Invalid precision (%d)", precision); - d->params.realNumberPrecision = 6; - return; - } - d->params.realNumberPrecision = precision; -} - -/*! - Returns the current real number precision, or the number of fraction - digits QTextStream will write when generating real numbers. - - \sa setRealNumberNotation(), realNumberNotation(), numberFlags(), integerBase() -*/ -int QTextStream::realNumberPrecision() const -{ - Q_D(const QTextStream); - return d->params.realNumberPrecision; -} - -/*! - Returns the status of the text stream. - - \sa QTextStream::Status, setStatus(), resetStatus() -*/ - -QTextStream::Status QTextStream::status() const -{ - Q_D(const QTextStream); - return d->status; -} - -/*! - \since 4.1 - - Resets the status of the text stream. - - \sa QTextStream::Status, status(), setStatus() -*/ -void QTextStream::resetStatus() -{ - Q_D(QTextStream); - d->status = Ok; -} - -/*! - \since 4.1 - - Sets the status of the text stream to the \a status given. - - Subsequent calls to setStatus() are ignored until resetStatus() - is called. - - \sa Status, status(), resetStatus() -*/ -void QTextStream::setStatus(Status status) -{ - Q_D(QTextStream); - if (d->status == Ok) - d->status = status; -} - -/*! - Returns \c true if there is no more data to be read from the - QTextStream; otherwise returns \c false. This is similar to, but not - the same as calling QIODevice::atEnd(), as QTextStream also takes - into account its internal Unicode buffer. -*/ -bool QTextStream::atEnd() const -{ - Q_D(const QTextStream); - CHECK_VALID_STREAM(true); - - if (d->string) - return d->string->size() == d->stringOffset; - return d->readBuffer.isEmpty() && d->device->atEnd(); -} - -/*! - Reads the entire content of the stream, and returns it as a - QString. Avoid this function when working on large files, as it - will consume a significant amount of memory. - - Calling \l {QTextStream::readLine()}{readLine()} is better if you do not know how much data is - available. - - \sa readLine() -*/ -QString QTextStream::readAll() -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(QString()); - - return d->read(INT_MAX); -} - -/*! - Reads one line of text from the stream, and returns it as a - QString. The maximum allowed line length is set to \a maxlen. If - the stream contains lines longer than this, then the lines will be - split after \a maxlen characters and returned in parts. - - If \a maxlen is 0, the lines can be of any length. - - The returned line has no trailing end-of-line characters ("\\n" - or "\\r\\n"), so calling QString::trimmed() can be unnecessary. - - If the stream has read to the end of the file, \l {QTextStream::readLine()}{readLine()} - will return a null QString. For strings, or for devices that support it, - you can explicitly test for the end of the stream using atEnd(). - - \sa readAll(), QIODevice::readLine() -*/ -QString QTextStream::readLine(qint64 maxlen) -{ - QString line; - - readLineInto(&line, maxlen); - return line; -} - -/*! - \since 5.5 - - Reads one line of text from the stream into \a line. - If \a line is 0, the read line is not stored. - - The maximum allowed line length is set to \a maxlen. If - the stream contains lines longer than this, then the lines will be - split after \a maxlen characters and returned in parts. - - If \a maxlen is 0, the lines can be of any length. - - The resulting line has no trailing end-of-line characters ("\\n" - or "\\r\\n"), so calling QString::trimmed() can be unnecessary. - - If \a line has sufficient capacity for the data that is about to be - read, this function may not need to allocate new memory. Because of - this, it can be faster than readLine(). - - Returns \c false if the stream has read to the end of the file or - an error has occurred; otherwise returns \c true. The contents in - \a line before the call are discarded in any case. - - \sa readAll(), QIODevice::readLine() -*/ -bool QTextStream::readLineInto(QString *line, qint64 maxlen) -{ - Q_D(QTextStream); - // keep in sync with CHECK_VALID_STREAM - if (!d->string && !d->device) { - qWarning("QTextStream: No device"); - if (line && !line->isNull()) - line->resize(0); - return false; - } - - const QChar *readPtr; - int length; - if (!d->scan(&readPtr, &length, int(maxlen), QTextStreamPrivate::EndOfLine)) { - if (line && !line->isNull()) - line->resize(0); - return false; - } - - if (Q_LIKELY(line)) - line->setUnicode(readPtr, length); - d->consumeLastToken(); - return true; -} - -/*! - \since 4.1 - - Reads at most \a maxlen characters from the stream, and returns the data - read as a QString. - - \sa readAll(), readLine(), QIODevice::read() -*/ -QString QTextStream::read(qint64 maxlen) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(QString()); - - if (maxlen <= 0) - return QString::fromLatin1(""); // empty, not null - - return d->read(int(maxlen)); -} - -/*! - \internal -*/ -QTextStreamPrivate::NumberParsingStatus QTextStreamPrivate::getNumber(qulonglong *ret) -{ - scan(0, 0, 0, NotSpace); - consumeLastToken(); - - // detect int encoding - int base = params.integerBase; - if (base == 0) { - QChar ch; - if (!getChar(&ch)) - return npsInvalidPrefix; - if (ch == QLatin1Char('0')) { - QChar ch2; - if (!getChar(&ch2)) { - // Result is the number 0 - *ret = 0; - return npsOk; - } - ch2 = ch2.toLower(); - - if (ch2 == QLatin1Char('x')) { - base = 16; - } else if (ch2 == QLatin1Char('b')) { - base = 2; - } else if (ch2.isDigit() && ch2.digitValue() >= 0 && ch2.digitValue() <= 7) { - base = 8; - } else { - base = 10; - } - ungetChar(ch2); - } else if (ch == locale.negativeSign() || ch == locale.positiveSign() || ch.isDigit()) { - base = 10; - } else { - ungetChar(ch); - return npsInvalidPrefix; - } - ungetChar(ch); - // State of the stream is now the same as on entry - // (cursor is at prefix), - // and local variable 'base' has been set appropriately. - } - - qulonglong val=0; - switch (base) { - case 2: { - QChar pf1, pf2, dig; - // Parse prefix '0b' - if (!getChar(&pf1) || pf1 != QLatin1Char('0')) - return npsInvalidPrefix; - if (!getChar(&pf2) || pf2.toLower() != QLatin1Char('b')) - return npsInvalidPrefix; - // Parse digits - int ndigits = 0; - while (getChar(&dig)) { - int n = dig.toLower().unicode(); - if (n == '0' || n == '1') { - val <<= 1; - val += n - '0'; - } else { - ungetChar(dig); - break; - } - ndigits++; - } - if (ndigits == 0) { - // Unwind the prefix and abort - ungetChar(pf2); - ungetChar(pf1); - return npsMissingDigit; - } - break; - } - case 8: { - QChar pf, dig; - // Parse prefix '0' - if (!getChar(&pf) || pf != QLatin1Char('0')) - return npsInvalidPrefix; - // Parse digits - int ndigits = 0; - while (getChar(&dig)) { - int n = dig.toLower().unicode(); - if (n >= '0' && n <= '7') { - val *= 8; - val += n - '0'; - } else { - ungetChar(dig); - break; - } - ndigits++; - } - if (ndigits == 0) { - // Unwind the prefix and abort - ungetChar(pf); - return npsMissingDigit; - } - break; - } - case 10: { - // Parse sign (or first digit) - QChar sign; - int ndigits = 0; - if (!getChar(&sign)) - return npsMissingDigit; - if (sign != locale.negativeSign() && sign != locale.positiveSign()) { - if (!sign.isDigit()) { - ungetChar(sign); - return npsMissingDigit; - } - val += sign.digitValue(); - ndigits++; - } - // Parse digits - QChar ch; - while (getChar(&ch)) { - if (ch.isDigit()) { - val *= 10; - val += ch.digitValue(); - } else if (locale != QLocale::c() && ch == locale.groupSeparator()) { - continue; - } else { - ungetChar(ch); - break; - } - ndigits++; - } - if (ndigits == 0) - return npsMissingDigit; - if (sign == locale.negativeSign()) { - qlonglong ival = qlonglong(val); - if (ival > 0) - ival = -ival; - val = qulonglong(ival); - } - break; - } - case 16: { - QChar pf1, pf2, dig; - // Parse prefix ' 0x' - if (!getChar(&pf1) || pf1 != QLatin1Char('0')) - return npsInvalidPrefix; - if (!getChar(&pf2) || pf2.toLower() != QLatin1Char('x')) - return npsInvalidPrefix; - // Parse digits - int ndigits = 0; - while (getChar(&dig)) { - int n = dig.toLower().unicode(); - if (n >= '0' && n <= '9') { - val <<= 4; - val += n - '0'; - } else if (n >= 'a' && n <= 'f') { - val <<= 4; - val += 10 + (n - 'a'); - } else { - ungetChar(dig); - break; - } - ndigits++; - } - if (ndigits == 0) { - return npsMissingDigit; - } - break; - } - default: - // Unsupported integerBase - return npsInvalidPrefix; - } - - if (ret) - *ret = val; - return npsOk; -} - -/*! - \internal - (hihi) -*/ -bool QTextStreamPrivate::getReal(double *f) -{ - // We use a table-driven FSM to parse floating point numbers - // strtod() cannot be used directly since we may be reading from a - // QIODevice. - enum ParserState { - Init = 0, - Sign = 1, - Mantissa = 2, - Dot = 3, - Abscissa = 4, - ExpMark = 5, - ExpSign = 6, - Exponent = 7, - Nan1 = 8, - Nan2 = 9, - Inf1 = 10, - Inf2 = 11, - NanInf = 12, - Done = 13 - }; - enum InputToken { - None = 0, - InputSign = 1, - InputDigit = 2, - InputDot = 3, - InputExp = 4, - InputI = 5, - InputN = 6, - InputF = 7, - InputA = 8, - InputT = 9 - }; - - static const uchar table[13][10] = { - // None InputSign InputDigit InputDot InputExp InputI InputN InputF InputA InputT - { 0, Sign, Mantissa, Dot, 0, Inf1, Nan1, 0, 0, 0 }, // 0 Init - { 0, 0, Mantissa, Dot, 0, Inf1, Nan1, 0, 0, 0 }, // 1 Sign - { Done, Done, Mantissa, Dot, ExpMark, 0, 0, 0, 0, 0 }, // 2 Mantissa - { 0, 0, Abscissa, 0, 0, 0, 0, 0, 0, 0 }, // 3 Dot - { Done, Done, Abscissa, Done, ExpMark, 0, 0, 0, 0, 0 }, // 4 Abscissa - { 0, ExpSign, Exponent, 0, 0, 0, 0, 0, 0, 0 }, // 5 ExpMark - { 0, 0, Exponent, 0, 0, 0, 0, 0, 0, 0 }, // 6 ExpSign - { Done, Done, Exponent, Done, Done, 0, 0, 0, 0, 0 }, // 7 Exponent - { 0, 0, 0, 0, 0, 0, 0, 0, Nan2, 0 }, // 8 Nan1 - { 0, 0, 0, 0, 0, 0, NanInf, 0, 0, 0 }, // 9 Nan2 - { 0, 0, 0, 0, 0, 0, Inf2, 0, 0, 0 }, // 10 Inf1 - { 0, 0, 0, 0, 0, 0, 0, NanInf, 0, 0 }, // 11 Inf2 - { Done, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 11 NanInf - }; - - ParserState state = Init; - InputToken input = None; - - scan(0, 0, 0, NotSpace); - consumeLastToken(); - - const int BufferSize = 128; - char buf[BufferSize]; - int i = 0; - - QChar c; - while (getChar(&c)) { - switch (c.unicode()) { - case '0': case '1': case '2': case '3': case '4': - case '5': case '6': case '7': case '8': case '9': - input = InputDigit; - break; - case 'i': case 'I': - input = InputI; - break; - case 'n': case 'N': - input = InputN; - break; - case 'f': case 'F': - input = InputF; - break; - case 'a': case 'A': - input = InputA; - break; - case 't': case 'T': - input = InputT; - break; - default: { - QChar lc = c.toLower(); - if (lc == locale.decimalPoint().toLower()) - input = InputDot; - else if (lc == locale.exponential().toLower()) - input = InputExp; - else if (lc == locale.negativeSign().toLower() - || lc == locale.positiveSign().toLower()) - input = InputSign; - else if (locale != QLocale::c() // backward-compatibility - && lc == locale.groupSeparator().toLower()) - input = InputDigit; // well, it isn't a digit, but no one cares. - else - input = None; - } - break; - } - - state = ParserState(table[state][input]); - - if (state == Init || state == Done || i > (BufferSize - 5)) { - ungetChar(c); - if (i > (BufferSize - 5)) { // ignore rest of digits - while (getChar(&c)) { - if (!c.isDigit()) { - ungetChar(c); - break; - } - } - } - break; - } - - buf[i++] = c.toLatin1(); - } - - if (i == 0) - return false; - if (!f) - return true; - buf[i] = '\0'; - - // backward-compatibility. Old implementation supported +nan/-nan - // for some reason. QLocale only checks for lower-case - // nan/+inf/-inf, so here we also check for uppercase and mixed - // case versions. - if (!qstricmp(buf, "nan") || !qstricmp(buf, "+nan") || !qstricmp(buf, "-nan")) { - *f = qSNaN(); - return true; - } else if (!qstricmp(buf, "+inf") || !qstricmp(buf, "inf")) { - *f = qInf(); - return true; - } else if (!qstricmp(buf, "-inf")) { - *f = -qInf(); - return true; - } - bool ok; - *f = locale.toDouble(QString::fromLatin1(buf), &ok); - return ok; -} - -/*! - Reads a character from the stream and stores it in \a c. Returns a - reference to the QTextStream, so several operators can be - nested. Example: - - \snippet code/src_corelib_io_qtextstream.cpp 7 - - Whitespace is \e not skipped. -*/ - -QTextStream &QTextStream::operator>>(QChar &c) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->scan(0, 0, 0, QTextStreamPrivate::NotSpace); - if (!d->getChar(&c)) - setStatus(ReadPastEnd); - return *this; -} - -/*! - \overload - - Reads a character from the stream and stores it in \a c. The - character from the stream is converted to ISO-5589-1 before it is - stored. - - \sa QChar::toLatin1() -*/ -QTextStream &QTextStream::operator>>(char &c) -{ - QChar ch; - *this >> ch; - c = ch.toLatin1(); - return *this; -} - -/*! - Reads an integer from the stream and stores it in \a i, then - returns a reference to the QTextStream. The number is cast to - the correct type before it is stored. If no number was detected on - the stream, \a i is set to 0. - - By default, QTextStream will attempt to detect the base of the - number using the following rules: - - \table - \header \li Prefix \li Base - \row \li "0b" or "0B" \li 2 (binary) - \row \li "0" followed by "0-7" \li 8 (octal) - \row \li "0" otherwise \li 10 (decimal) - \row \li "0x" or "0X" \li 16 (hexadecimal) - \row \li "1" to "9" \li 10 (decimal) - \endtable - - By calling setIntegerBase(), you can specify the integer base - explicitly. This will disable the auto-detection, and speed up - QTextStream slightly. - - Leading whitespace is skipped. -*/ -QTextStream &QTextStream::operator>>(signed short &i) -{ - IMPLEMENT_STREAM_RIGHT_INT_OPERATOR(signed short); -} - -/*! - \overload - - Stores the integer in the unsigned short \a i. -*/ -QTextStream &QTextStream::operator>>(unsigned short &i) -{ - IMPLEMENT_STREAM_RIGHT_INT_OPERATOR(unsigned short); -} - -/*! - \overload - - Stores the integer in the signed int \a i. -*/ -QTextStream &QTextStream::operator>>(signed int &i) -{ - IMPLEMENT_STREAM_RIGHT_INT_OPERATOR(signed int); -} - -/*! - \overload - - Stores the integer in the unsigned int \a i. -*/ -QTextStream &QTextStream::operator>>(unsigned int &i) -{ - IMPLEMENT_STREAM_RIGHT_INT_OPERATOR(unsigned int); -} - -/*! - \overload - - Stores the integer in the signed long \a i. -*/ -QTextStream &QTextStream::operator>>(signed long &i) -{ - IMPLEMENT_STREAM_RIGHT_INT_OPERATOR(signed long); -} - -/*! - \overload - - Stores the integer in the unsigned long \a i. -*/ -QTextStream &QTextStream::operator>>(unsigned long &i) -{ - IMPLEMENT_STREAM_RIGHT_INT_OPERATOR(unsigned long); -} - -/*! - \overload - - Stores the integer in the qlonglong \a i. -*/ -QTextStream &QTextStream::operator>>(qlonglong &i) -{ - IMPLEMENT_STREAM_RIGHT_INT_OPERATOR(qlonglong); -} - -/*! - \overload - - Stores the integer in the qulonglong \a i. -*/ -QTextStream &QTextStream::operator>>(qulonglong &i) -{ - IMPLEMENT_STREAM_RIGHT_INT_OPERATOR(qulonglong); -} - -/*! - Reads a real number from the stream and stores it in \a f, then - returns a reference to the QTextStream. The number is cast to - the correct type. If no real number is detect on the stream, \a f - is set to 0.0. - - As a special exception, QTextStream allows the strings "nan" and "inf" to - represent NAN and INF floats or doubles. - - Leading whitespace is skipped. -*/ -QTextStream &QTextStream::operator>>(float &f) -{ - IMPLEMENT_STREAM_RIGHT_REAL_OPERATOR(float); -} - -/*! - \overload - - Stores the real number in the double \a f. -*/ -QTextStream &QTextStream::operator>>(double &f) -{ - IMPLEMENT_STREAM_RIGHT_REAL_OPERATOR(double); -} - -/*! - Reads a word from the stream and stores it in \a str, then returns - a reference to the stream. Words are separated by whitespace - (i.e., all characters for which QChar::isSpace() returns \c true). - - Leading whitespace is skipped. -*/ -QTextStream &QTextStream::operator>>(QString &str) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - - str.clear(); - d->scan(0, 0, 0, QTextStreamPrivate::NotSpace); - d->consumeLastToken(); - - const QChar *ptr; - int length; - if (!d->scan(&ptr, &length, 0, QTextStreamPrivate::Space)) { - setStatus(ReadPastEnd); - return *this; - } - - str = QString(ptr, length); - d->consumeLastToken(); - return *this; -} - -/*! - \overload - - Converts the word to ISO-8859-1, then stores it in \a array. - - \sa QString::toLatin1() -*/ -QTextStream &QTextStream::operator>>(QByteArray &array) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - - array.clear(); - d->scan(0, 0, 0, QTextStreamPrivate::NotSpace); - d->consumeLastToken(); - - const QChar *ptr; - int length; - if (!d->scan(&ptr, &length, 0, QTextStreamPrivate::Space)) { - setStatus(ReadPastEnd); - return *this; - } - - for (int i = 0; i < length; ++i) - array += ptr[i].toLatin1(); - - d->consumeLastToken(); - return *this; -} - -/*! - \overload - - Stores the word in \a c, terminated by a '\\0' character. If no word is - available, only the '\\0' character is stored. - - Warning: Although convenient, this operator is dangerous and must - be used with care. QTextStream assumes that \a c points to a - buffer with enough space to hold the word. If the buffer is too - small, your application may crash. - - If possible, use the QByteArray operator instead. -*/ -QTextStream &QTextStream::operator>>(char *c) -{ - Q_D(QTextStream); - *c = 0; - CHECK_VALID_STREAM(*this); - d->scan(0, 0, 0, QTextStreamPrivate::NotSpace); - d->consumeLastToken(); - - const QChar *ptr; - int length; - if (!d->scan(&ptr, &length, 0, QTextStreamPrivate::Space)) { - setStatus(ReadPastEnd); - return *this; - } - - for (int i = 0; i < length; ++i) - *c++ = ptr[i].toLatin1(); - *c = '\0'; - d->consumeLastToken(); - return *this; -} - -/*! - \internal - */ -void QTextStreamPrivate::putNumber(qulonglong number, bool negative) -{ - QString result; - - unsigned flags = 0; - const QTextStream::NumberFlags numberFlags = params.numberFlags; - if (numberFlags & QTextStream::ShowBase) - flags |= QLocaleData::ShowBase; - if (numberFlags & QTextStream::ForceSign) - flags |= QLocaleData::AlwaysShowSign; - if (numberFlags & QTextStream::UppercaseBase) - flags |= QLocaleData::UppercaseBase; - if (numberFlags & QTextStream::UppercaseDigits) - flags |= QLocaleData::CapitalEorX; - - // add thousands group separators. For backward compatibility we - // don't add a group separator for C locale. - if (locale != QLocale::c() && !locale.numberOptions().testFlag(QLocale::OmitGroupSeparator)) - flags |= QLocaleData::ThousandsGroup; - - const QLocaleData *dd = locale.d->m_data; - int base = params.integerBase ? params.integerBase : 10; - if (negative && base == 10) { - result = dd->longLongToString(-static_cast<qlonglong>(number), -1, - base, -1, flags); - } else if (negative) { - // Workaround for backward compatibility for writing negative - // numbers in octal and hex: - // QTextStream(result) << showbase << hex << -1 << oct << -1 - // should output: -0x1 -0b1 - result = dd->unsLongLongToString(number, -1, base, -1, flags); - result.prepend(locale.negativeSign()); - } else { - result = dd->unsLongLongToString(number, -1, base, -1, flags); - // workaround for backward compatibility - in octal form with - // ShowBase flag set zero should be written as '00' - if (number == 0 && base == 8 && params.numberFlags & QTextStream::ShowBase - && result == QLatin1String("0")) { - result.prepend(QLatin1Char('0')); - } - } - putString(result, true); -} - -/*! - Writes the character \a c to the stream, then returns a reference - to the QTextStream. - - \sa setFieldWidth() -*/ -QTextStream &QTextStream::operator<<(QChar c) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->putChar(c); - return *this; -} - -/*! - \overload - - Converts \a c from ASCII to a QChar, then writes it to the stream. -*/ -QTextStream &QTextStream::operator<<(char c) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->putChar(QChar::fromLatin1(c)); - return *this; -} - -/*! - Writes the integer number \a i to the stream, then returns a - reference to the QTextStream. By default, the number is stored in - decimal form, but you can also set the base by calling - setIntegerBase(). - - \sa setFieldWidth(), setNumberFlags() -*/ -QTextStream &QTextStream::operator<<(signed short i) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->putNumber((qulonglong)qAbs(qlonglong(i)), i < 0); - return *this; -} - -/*! - \overload - - Writes the unsigned short \a i to the stream. -*/ -QTextStream &QTextStream::operator<<(unsigned short i) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->putNumber((qulonglong)i, false); - return *this; -} - -/*! - \overload - - Writes the signed int \a i to the stream. -*/ -QTextStream &QTextStream::operator<<(signed int i) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->putNumber((qulonglong)qAbs(qlonglong(i)), i < 0); - return *this; -} - -/*! - \overload - - Writes the unsigned int \a i to the stream. -*/ -QTextStream &QTextStream::operator<<(unsigned int i) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->putNumber((qulonglong)i, false); - return *this; -} - -/*! - \overload - - Writes the signed long \a i to the stream. -*/ -QTextStream &QTextStream::operator<<(signed long i) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->putNumber((qulonglong)qAbs(qlonglong(i)), i < 0); - return *this; -} - -/*! - \overload - - Writes the unsigned long \a i to the stream. -*/ -QTextStream &QTextStream::operator<<(unsigned long i) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->putNumber((qulonglong)i, false); - return *this; -} - -/*! - \overload - - Writes the qlonglong \a i to the stream. -*/ -QTextStream &QTextStream::operator<<(qlonglong i) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->putNumber((qulonglong)qAbs(i), i < 0); - return *this; -} - -/*! - \overload - - Writes the qulonglong \a i to the stream. -*/ -QTextStream &QTextStream::operator<<(qulonglong i) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->putNumber(i, false); - return *this; -} - -/*! - Writes the real number \a f to the stream, then returns a - reference to the QTextStream. By default, QTextStream stores it - using SmartNotation, with up to 6 digits of precision. You can - change the textual representation QTextStream will use for real - numbers by calling setRealNumberNotation(), - setRealNumberPrecision() and setNumberFlags(). - - \sa setFieldWidth(), setRealNumberNotation(), - setRealNumberPrecision(), setNumberFlags() -*/ -QTextStream &QTextStream::operator<<(float f) -{ - return *this << double(f); -} - -/*! - \overload - - Writes the double \a f to the stream. -*/ -QTextStream &QTextStream::operator<<(double f) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - - QLocaleData::DoubleForm form = QLocaleData::DFDecimal; - switch (realNumberNotation()) { - case FixedNotation: - form = QLocaleData::DFDecimal; - break; - case ScientificNotation: - form = QLocaleData::DFExponent; - break; - case SmartNotation: - form = QLocaleData::DFSignificantDigits; - break; - } - - uint flags = 0; - const QLocale::NumberOptions numberOptions = locale().numberOptions(); - if (numberFlags() & ShowBase) - flags |= QLocaleData::ShowBase; - if (numberFlags() & ForceSign) - flags |= QLocaleData::AlwaysShowSign; - if (numberFlags() & UppercaseBase) - flags |= QLocaleData::UppercaseBase; - if (numberFlags() & UppercaseDigits) - flags |= QLocaleData::CapitalEorX; - if (numberFlags() & ForcePoint) { - flags |= QLocaleData::ForcePoint; - - // Only for backwards compatibility - flags |= QLocaleData::AddTrailingZeroes | QLocaleData::ShowBase; - } - if (locale() != QLocale::c() && !(numberOptions & QLocale::OmitGroupSeparator)) - flags |= QLocaleData::ThousandsGroup; - if (!(numberOptions & QLocale::OmitLeadingZeroInExponent)) - flags |= QLocaleData::ZeroPadExponent; - if (numberOptions & QLocale::IncludeTrailingZeroesAfterDot) - flags |= QLocaleData::AddTrailingZeroes; - - const QLocaleData *dd = d->locale.d->m_data; - QString num = dd->doubleToString(f, d->params.realNumberPrecision, form, -1, flags); - d->putString(num, true); - return *this; -} - -/*! - Writes the string \a string to the stream, and returns a reference - to the QTextStream. The string is first encoded using the assigned - codec (the default codec is QTextCodec::codecForLocale()) before - it is written to the stream. - - \sa setFieldWidth(), setCodec() -*/ -QTextStream &QTextStream::operator<<(const QString &string) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->putString(string); - return *this; -} - -/*! - \overload - - Writes \a string to the stream, and returns a reference to the - QTextStream. -*/ -QTextStream &QTextStream::operator<<(QLatin1String string) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->putString(string); - return *this; -} - -/*! - \since 5.6 - \overload - - Writes \a string to the stream, and returns a reference to the - QTextStream. -*/ -QTextStream &QTextStream::operator<<(const QStringRef &string) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->putString(string.data(), string.size()); - return *this; -} - -/*! - \overload - - Writes \a array to the stream. The contents of \a array are - converted with QString::fromUtf8(). -*/ -QTextStream &QTextStream::operator<<(const QByteArray &array) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - d->putString(QString::fromUtf8(array.constData(), array.length())); - return *this; -} - -/*! - \overload - - Writes the constant string pointed to by \a string to the stream. \a - string is assumed to be in ISO-8859-1 encoding. This operator - is convenient when working with constant string data. Example: - - \snippet code/src_corelib_io_qtextstream.cpp 8 - - Warning: QTextStream assumes that \a string points to a string of - text, terminated by a '\\0' character. If there is no terminating - '\\0' character, your application may crash. -*/ -QTextStream &QTextStream::operator<<(const char *string) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - // ### Qt6: consider changing to UTF-8 - d->putString(QLatin1String(string)); - return *this; -} - -/*! - \overload - - Writes \a ptr to the stream as a hexadecimal number with a base. -*/ - -QTextStream &QTextStream::operator<<(const void *ptr) -{ - Q_D(QTextStream); - CHECK_VALID_STREAM(*this); - const int oldBase = d->params.integerBase; - const NumberFlags oldFlags = d->params.numberFlags; - d->params.integerBase = 16; - d->params.numberFlags |= ShowBase; - d->putNumber(reinterpret_cast<quintptr>(ptr), false); - d->params.integerBase = oldBase; - d->params.numberFlags = oldFlags; - return *this; -} - -/*! - \relates QTextStream - - Calls QTextStream::setIntegerBase(2) on \a stream and returns \a - stream. - - \sa oct(), dec(), hex(), {QTextStream manipulators} -*/ -QTextStream &bin(QTextStream &stream) -{ - stream.setIntegerBase(2); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setIntegerBase(8) on \a stream and returns \a - stream. - - \sa bin(), dec(), hex(), {QTextStream manipulators} -*/ -QTextStream &oct(QTextStream &stream) -{ - stream.setIntegerBase(8); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setIntegerBase(10) on \a stream and returns \a - stream. - - \sa bin(), oct(), hex(), {QTextStream manipulators} -*/ -QTextStream &dec(QTextStream &stream) -{ - stream.setIntegerBase(10); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setIntegerBase(16) on \a stream and returns \a - stream. - - \note The hex modifier can only be used for writing to streams. - \sa bin(), oct(), dec(), {QTextStream manipulators} -*/ -QTextStream &hex(QTextStream &stream) -{ - stream.setIntegerBase(16); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setNumberFlags(QTextStream::numberFlags() | - QTextStream::ShowBase) on \a stream and returns \a stream. - - \sa noshowbase(), forcesign(), forcepoint(), {QTextStream manipulators} -*/ -QTextStream &showbase(QTextStream &stream) -{ - stream.setNumberFlags(stream.numberFlags() | QTextStream::ShowBase); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setNumberFlags(QTextStream::numberFlags() | - QTextStream::ForceSign) on \a stream and returns \a stream. - - \sa noforcesign(), forcepoint(), showbase(), {QTextStream manipulators} -*/ -QTextStream &forcesign(QTextStream &stream) -{ - stream.setNumberFlags(stream.numberFlags() | QTextStream::ForceSign); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setNumberFlags(QTextStream::numberFlags() | - QTextStream::ForcePoint) on \a stream and returns \a stream. - - \sa noforcepoint(), forcesign(), showbase(), {QTextStream manipulators} -*/ -QTextStream &forcepoint(QTextStream &stream) -{ - stream.setNumberFlags(stream.numberFlags() | QTextStream::ForcePoint); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setNumberFlags(QTextStream::numberFlags() & - ~QTextStream::ShowBase) on \a stream and returns \a stream. - - \sa showbase(), noforcesign(), noforcepoint(), {QTextStream manipulators} -*/ -QTextStream &noshowbase(QTextStream &stream) -{ - stream.setNumberFlags(stream.numberFlags() &= ~QTextStream::ShowBase); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setNumberFlags(QTextStream::numberFlags() & - ~QTextStream::ForceSign) on \a stream and returns \a stream. - - \sa forcesign(), noforcepoint(), noshowbase(), {QTextStream manipulators} -*/ -QTextStream &noforcesign(QTextStream &stream) -{ - stream.setNumberFlags(stream.numberFlags() &= ~QTextStream::ForceSign); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setNumberFlags(QTextStream::numberFlags() & - ~QTextStream::ForcePoint) on \a stream and returns \a stream. - - \sa forcepoint(), noforcesign(), noshowbase(), {QTextStream manipulators} -*/ -QTextStream &noforcepoint(QTextStream &stream) -{ - stream.setNumberFlags(stream.numberFlags() &= ~QTextStream::ForcePoint); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setNumberFlags(QTextStream::numberFlags() | - QTextStream::UppercaseBase) on \a stream and returns \a stream. - - \sa lowercasebase(), uppercasedigits(), {QTextStream manipulators} -*/ -QTextStream &uppercasebase(QTextStream &stream) -{ - stream.setNumberFlags(stream.numberFlags() | QTextStream::UppercaseBase); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setNumberFlags(QTextStream::numberFlags() | - QTextStream::UppercaseDigits) on \a stream and returns \a stream. - - \sa lowercasedigits(), uppercasebase(), {QTextStream manipulators} -*/ -QTextStream &uppercasedigits(QTextStream &stream) -{ - stream.setNumberFlags(stream.numberFlags() | QTextStream::UppercaseDigits); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setNumberFlags(QTextStream::numberFlags() & - ~QTextStream::UppercaseBase) on \a stream and returns \a stream. - - \sa uppercasebase(), lowercasedigits(), {QTextStream manipulators} -*/ -QTextStream &lowercasebase(QTextStream &stream) -{ - stream.setNumberFlags(stream.numberFlags() & ~QTextStream::UppercaseBase); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setNumberFlags(QTextStream::numberFlags() & - ~QTextStream::UppercaseDigits) on \a stream and returns \a stream. - - \sa uppercasedigits(), lowercasebase(), {QTextStream manipulators} -*/ -QTextStream &lowercasedigits(QTextStream &stream) -{ - stream.setNumberFlags(stream.numberFlags() & ~QTextStream::UppercaseDigits); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setRealNumberNotation(QTextStream::FixedNotation) - on \a stream and returns \a stream. - - \sa scientific(), {QTextStream manipulators} -*/ -QTextStream &fixed(QTextStream &stream) -{ - stream.setRealNumberNotation(QTextStream::FixedNotation); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setRealNumberNotation(QTextStream::ScientificNotation) - on \a stream and returns \a stream. - - \sa fixed(), {QTextStream manipulators} -*/ -QTextStream &scientific(QTextStream &stream) -{ - stream.setRealNumberNotation(QTextStream::ScientificNotation); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setFieldAlignment(QTextStream::AlignLeft) - on \a stream and returns \a stream. - - \sa {QTextStream::}{right()}, {QTextStream::}{center()}, {QTextStream manipulators} -*/ -QTextStream &left(QTextStream &stream) -{ - stream.setFieldAlignment(QTextStream::AlignLeft); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setFieldAlignment(QTextStream::AlignRight) - on \a stream and returns \a stream. - - \sa {QTextStream::}{left()}, {QTextStream::}{center()}, {QTextStream manipulators} -*/ -QTextStream &right(QTextStream &stream) -{ - stream.setFieldAlignment(QTextStream::AlignRight); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::setFieldAlignment(QTextStream::AlignCenter) - on \a stream and returns \a stream. - - \sa {QTextStream::}{left()}, {QTextStream::}{right()}, {QTextStream manipulators} -*/ -QTextStream ¢er(QTextStream &stream) -{ - stream.setFieldAlignment(QTextStream::AlignCenter); - return stream; -} - -/*! - \relates QTextStream - - Writes '\\n' to the \a stream and flushes the stream. - - Equivalent to - - \snippet code/src_corelib_io_qtextstream.cpp 9 - - Note: On Windows, all '\\n' characters are written as '\\r\\n' if - QTextStream's device or string is opened using the QIODevice::Text flag. - - \sa flush(), reset(), {QTextStream manipulators} -*/ -QTextStream &endl(QTextStream &stream) -{ - return stream << QLatin1Char('\n') << flush; -} - -/*! - \relates QTextStream - - Calls QTextStream::flush() on \a stream and returns \a stream. - - \sa endl(), reset(), {QTextStream manipulators} -*/ -QTextStream &flush(QTextStream &stream) -{ - stream.flush(); - return stream; -} - -/*! - \relates QTextStream - - Calls QTextStream::reset() on \a stream and returns \a stream. - - \sa flush(), {QTextStream manipulators} -*/ -QTextStream &reset(QTextStream &stream) -{ - stream.reset(); - return stream; -} - -/*! - \relates QTextStream - - Calls \l {QTextStream::}{skipWhiteSpace()} on \a stream and returns \a stream. - - \sa {QTextStream manipulators} -*/ -QTextStream &ws(QTextStream &stream) -{ - stream.skipWhiteSpace(); - return stream; -} - -/*! - \fn QTextStreamManipulator qSetFieldWidth(int width) - \relates QTextStream - - Equivalent to QTextStream::setFieldWidth(\a width). -*/ - -/*! - \fn QTextStreamManipulator qSetPadChar(QChar ch) - \relates QTextStream - - Equivalent to QTextStream::setPadChar(\a ch). -*/ - -/*! - \fn QTextStreamManipulator qSetRealNumberPrecision(int precision) - \relates QTextStream - - Equivalent to QTextStream::setRealNumberPrecision(\a precision). -*/ - -#ifndef QT_NO_TEXTCODEC -/*! - \relates QTextStream - - Toggles insertion of the Byte Order Mark on \a stream when QTextStream is - used with a UTF codec. - - \sa QTextStream::setGenerateByteOrderMark(), {QTextStream manipulators} -*/ -QTextStream &bom(QTextStream &stream) -{ - stream.setGenerateByteOrderMark(true); - return stream; -} - -/*! - Sets the codec for this stream to \a codec. The codec is used for - decoding any data that is read from the assigned device, and for - encoding any data that is written. By default, - QTextCodec::codecForLocale() is used, and automatic unicode - detection is enabled. - - If QTextStream operates on a string, this function does nothing. - - \warning If you call this function while the text stream is reading - from an open sequential socket, the internal buffer may still contain - text decoded using the old codec. - - \sa codec(), setAutoDetectUnicode(), setLocale() -*/ -void QTextStream::setCodec(QTextCodec *codec) -{ - Q_D(QTextStream); - qint64 seekPos = -1; - if (!d->readBuffer.isEmpty()) { - if (!d->device->isSequential()) { - seekPos = pos(); - } - } - d->codec = codec; - if (seekPos >=0 && !d->readBuffer.isEmpty()) - seek(seekPos); -} - -/*! - Sets the codec for this stream to the QTextCodec for the encoding - specified by \a codecName. Common values for \c codecName include - "ISO 8859-1", "UTF-8", and "UTF-16". If the encoding isn't - recognized, nothing happens. - - Example: - - \snippet code/src_corelib_io_qtextstream.cpp 10 - - \sa QTextCodec::codecForName(), setLocale() -*/ -void QTextStream::setCodec(const char *codecName) -{ - QTextCodec *codec = QTextCodec::codecForName(codecName); - if (codec) - setCodec(codec); -} - -/*! - Returns the codec that is current assigned to the stream. - - \sa setCodec(), setAutoDetectUnicode(), locale() -*/ -QTextCodec *QTextStream::codec() const -{ - Q_D(const QTextStream); - return d->codec; -} - -/*! - If \a enabled is true, QTextStream will attempt to detect Unicode - encoding by peeking into the stream data to see if it can find the - UTF-16 or UTF-32 BOM (Byte Order Mark). If this mark is found, QTextStream - will replace the current codec with the UTF codec. - - This function can be used together with setCodec(). It is common - to set the codec to UTF-8, and then enable UTF-16 detection. - - \sa autoDetectUnicode(), setCodec() -*/ -void QTextStream::setAutoDetectUnicode(bool enabled) -{ - Q_D(QTextStream); - d->autoDetectUnicode = enabled; -} - -/*! - Returns \c true if automatic Unicode detection is enabled, otherwise - returns \c false. Automatic Unicode detection is enabled by default. - - \sa setAutoDetectUnicode(), setCodec() -*/ -bool QTextStream::autoDetectUnicode() const -{ - Q_D(const QTextStream); - return d->autoDetectUnicode; -} - -/*! - If \a generate is true and a UTF codec is used, QTextStream will insert - the BOM (Byte Order Mark) before any data has been written to the - device. If \a generate is false, no BOM will be inserted. This function - must be called before any data is written. Otherwise, it does nothing. - - \sa generateByteOrderMark(), bom() -*/ -void QTextStream::setGenerateByteOrderMark(bool generate) -{ - Q_D(QTextStream); - if (d->writeBuffer.isEmpty()) { - d->writeConverterState.flags.setFlag(QTextCodec::IgnoreHeader, !generate); - } -} - -/*! - Returns \c true if QTextStream is set to generate the UTF BOM (Byte Order - Mark) when using a UTF codec; otherwise returns \c false. UTF BOM generation is - set to false by default. - - \sa setGenerateByteOrderMark() -*/ -bool QTextStream::generateByteOrderMark() const -{ - Q_D(const QTextStream); - return (d->writeConverterState.flags & QTextCodec::IgnoreHeader) == 0; -} - -#endif - -/*! - \since 4.5 - - Sets the locale for this stream to \a locale. The specified locale is - used for conversions between numbers and their string representations. - - The default locale is C and it is a special case - the thousands - group separator is not used for backward compatibility reasons. - - \sa locale() -*/ -void QTextStream::setLocale(const QLocale &locale) -{ - Q_D(QTextStream); - d->locale = locale; -} - -/*! - \since 4.5 - - Returns the locale for this stream. The default locale is C. - - \sa setLocale() -*/ -QLocale QTextStream::locale() const -{ - Q_D(const QTextStream); - return d->locale; -} - -QT_END_NAMESPACE - -#ifndef QT_NO_QOBJECT -#include "moc_qtextstream_p.cpp" -#endif |