/**************************************************************************** ** ** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the Qt3Support 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 Digia. For licensing terms and ** conditions see http://qt.digia.com/licensing. For further information ** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Digia gives you certain additional ** rights. These rights are described in the Digia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 3.0 as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU General Public License version 3.0 requirements will be ** met: http://www.gnu.org/copyleft/gpl.html. ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include "q3textstream.h" #include #ifndef QT_NO_TEXTSTREAM #include "qtextcodec.h" #include "qregexp.h" #include "qbuffer.h" #include "qfile.h" #include "q3cstring.h" #include #include #include #ifndef Q_OS_WINCE #include #endif #if defined(Q_OS_WIN32) #include "qt_windows.h" #endif QT_BEGIN_NAMESPACE #ifndef QT_NO_TEXTCODEC static void resetCodecConverterState(QTextCodec::ConverterState *state) { state->flags = QTextCodec::DefaultConversion; state->remainingChars = state->invalidChars = state->state_data[0] = state->state_data[1] = state->state_data[2] = 0; if (state->d) qFree(state->d); state->d = 0; } #endif /*! \class Q3TextStream \compat \reentrant \brief The Q3TextStream class provides basic functions for reading and writing text using a QIODevice. The text stream class has a functional interface that is very similar to that of the standard C++ iostream class. Qt provides several global functions similar to the ones in iostream: \table \header \i Function \i Meaning \row \i bin \i sets the Q3TextStream to read/write binary numbers \row \i oct \i sets the Q3TextStream to read/write octal numbers \row \i dec \i sets the Q3TextStream to read/write decimal numbers \row \i hex \i sets the Q3TextStream to read/write hexadecimal numbers \row \i endl \i forces a line break \row \i flush \i forces the QIODevice to flush any buffered data \row \i ws \i eats any available whitespace (on input) \row \i reset \i resets the Q3TextStream to its default mode (see reset()) \row \i qSetW(int) \i sets the \link width() field width \endlink to the given argument \row \i qSetFill(int) \i sets the \link fill() fill character \endlink to the given argument \row \i qSetPrecision(int) \i sets the \link precision() precision \endlink to the given argument \endtable \warning By default Q3TextStream will automatically detect whether integers in the stream are in decimal, octal, hexadecimal or binary format when reading from the stream. In particular, a leading '0' signifies octal, i.e. the sequence "0100" will be interpreted as 64. The Q3TextStream class reads and writes text; it is not appropriate for dealing with binary data (but QDataStream is). By default, output of Unicode text (i.e. QString) is done using the local 8-bit encoding. This can be changed using the setEncoding() method. For input, the Q3TextStream will auto-detect standard Unicode "byte order marked" text files; otherwise the local 8-bit encoding is used. The QIODevice is set in the constructor, or later using setDevice(). If the end of the input is reached atEnd() returns TRUE. Data can be read into variables of the appropriate type using the operator>>() overloads, or read in its entirety into a single string using read(), or read a line at a time using readLine(). Whitespace can be skipped over using skipWhiteSpace(). You can set flags for the stream using flags() or setf(). The stream also supports width(), precision() and fill(); use reset() to reset the defaults. \sa QDataStream */ /*! \enum Q3TextStream::Encoding \value Locale \value Latin1 \value Unicode \value UnicodeNetworkOrder \value UnicodeReverse \value RawUnicode \value UnicodeUTF8 See setEncoding() for an explanation of the encodings. */ /* \class QTSManip \internal */ #if defined(QT_CHECK_STATE) #undef CHECK_STREAM_PRECOND #define CHECK_STREAM_PRECOND if ( !dev ) { \ qWarning( "Q3TextStream: No device" ); \ return *this; } #else #define CHECK_STREAM_PRECOND #endif #define I_SHORT 0x0010 #define I_INT 0x0020 #define I_LONG 0x0030 #define I_TYPE_MASK 0x00f0 #define I_BASE_2 Q3TextStream::bin #define I_BASE_8 Q3TextStream::oct #define I_BASE_10 Q3TextStream::dec #define I_BASE_16 Q3TextStream::hex #define I_BASE_MASK (Q3TextStream::bin | Q3TextStream::oct | Q3TextStream::dec | Q3TextStream::hex) #define I_SIGNED 0x0100 #define I_UNSIGNED 0x0200 #define I_SIGN_MASK 0x0f00 static const QChar QEOF = QChar((ushort)0xffff); //guaranteed not to be a character. static const uint getline_buf_size = 256; // bufsize used by ts_getline() const int Q3TextStream::basefield = I_BASE_MASK; const int Q3TextStream::adjustfield = ( Q3TextStream::left | Q3TextStream::right | Q3TextStream::internal ); const int Q3TextStream::floatfield = ( Q3TextStream::scientific | Q3TextStream::fixed ); class Q3TextStreamPrivate { public: #ifndef QT_NO_TEXTCODEC Q3TextStreamPrivate() : sourceType( NotSet ) { } ~Q3TextStreamPrivate() { } #else Q3TextStreamPrivate() : sourceType( NotSet ) { } ~Q3TextStreamPrivate() { } #endif QString ungetcBuf; enum SourceType { NotSet, IODevice, String, ByteArray, File }; SourceType sourceType; }; // skips whitespace and returns the first non-whitespace character QChar Q3TextStream::eat_ws() { QChar c; do { c = ts_getc(); } while ( c != QEOF && ts_isspace(c) ); return c; } void Q3TextStream::init() { // ### ungetcBuf = QEOF; dev = 0; owndev = FALSE; mapper = 0; #ifndef QT_NO_TEXTCODEC resetCodecConverterState(&mapperReadState); resetCodecConverterState(&mapperWriteState); #endif d = new Q3TextStreamPrivate; doUnicodeHeader = TRUE; // autodetect latin1 = TRUE; // should use locale? internalOrder = QChar::networkOrdered(); networkOrder = TRUE; } /*! Constructs a data stream that has no IO device. */ Q3TextStream::Q3TextStream() { init(); setEncoding( Locale ); reset(); d->sourceType = Q3TextStreamPrivate::NotSet; } /*! Constructs a text stream that uses the IO device \a iod. */ Q3TextStream::Q3TextStream( QIODevice *iod ) { init(); setEncoding( Locale ); dev = iod; reset(); d->sourceType = Q3TextStreamPrivate::IODevice; } // TODO: use special-case handling of this case in Q3TextStream, and // simplify this class to only deal with QChar or QString data. class QStringBuffer : public QIODevice { public: QStringBuffer( QString* str ); ~QStringBuffer(); bool open( OpenMode m ); void close(); qint64 size() const; protected: qint64 readData( char *p, qint64 len ); qint64 writeData( const char *p, qint64 len ); QString* s; private: QStringBuffer( const QStringBuffer & ); QStringBuffer &operator=( const QStringBuffer & ); }; QStringBuffer::QStringBuffer( QString* str ) { s = str; } QStringBuffer::~QStringBuffer() { } bool QStringBuffer::open( OpenMode m ) { if ( !s ) { #if defined(QT_CHECK_STATE) qWarning( "QStringBuffer::open: No string" ); #endif return FALSE; } if ( isOpen() ) { #if defined(QT_CHECK_STATE) qWarning( "QStringBuffer::open: Buffer already open" ); #endif return FALSE; } setOpenMode( m ); if ( m & QIODevice::Truncate ) s->truncate( 0 ); if ( m & QIODevice::Append ) { seek(s->length()*sizeof(QChar)); } else { seek(0); } return TRUE; } void QStringBuffer::close() { if ( isOpen() ) { seek(0); QIODevice::close(); } } qint64 QStringBuffer::size() const { return s ? s->length()*sizeof(QChar) : 0; } qint64 QStringBuffer::readData( char *p, qint64 len ) { #if defined(QT_CHECK_STATE) Q_CHECK_PTR( p ); if ( !isOpen() ) { qWarning( "QStringBuffer::readBlock: Buffer not open" ); return qint64(-1); } if ( !isReadable() ) { qWarning( "QStringBuffer::readBlock: Read operation not permitted" ); return qint64(-1); } #endif if ( pos() + len > qint64(s->length()*sizeof(QChar)) ) { // overflow if ( pos() >= qint64(s->length()*sizeof(QChar)) ) { return -1; } else { len = s->length()*2 - pos(); } } memcpy( p, ((const char*)(s->unicode()))+pos(), len ); return len; } qint64 QStringBuffer::writeData( const char *p, qint64 len ) { #if defined(QT_CHECK_NULL) if ( p == 0 && len != 0 ) qWarning( "QStringBuffer::writeBlock: Null pointer error" ); #endif #if defined(QT_CHECK_STATE) if ( !isOpen() ) { qWarning( "QStringBuffer::writeBlock: Buffer not open" ); return -1; } if ( !isWritable() ) { qWarning( "QStringBuffer::writeBlock: Write operation not permitted" ); return -1; } if ( pos()&1 ) { qWarning( "QStringBuffer::writeBlock: non-even index - non Unicode" ); return -1; } if ( len&1 ) { qWarning( "QStringBuffer::writeBlock: non-even length - non Unicode" ); return -1; } #endif s->replace(pos()/2, len/2, (QChar*)p, len/2); return len; } /*! Constructs a text stream that operates on the Unicode QString, \a str, through an internal device. The \a filemode argument is passed to the device's open() function; see \l{QIODevice::mode()}. If you set an encoding or codec with setEncoding() or setCodec(), this setting is ignored for text streams that operate on QString. Example: \snippet doc/src/snippets/code/src_qt3support_text_q3textstream.cpp 0 Writing data to the text stream will modify the contents of the string. The string will be expanded when data is written beyond the end of the string. Note that the string will not be truncated: \snippet doc/src/snippets/code/src_qt3support_text_q3textstream.cpp 1 Note that because QString is Unicode, you should not use readRawBytes() or writeRawBytes() on such a stream. */ Q3TextStream::Q3TextStream( QString* str, int filemode ) { // TODO: optimize for this case as it becomes more common // (see QStringBuffer above) init(); dev = new QStringBuffer( str ); ((QStringBuffer *)dev)->open( QIODevice::OpenMode(filemode) ); owndev = TRUE; setEncoding(RawUnicode); reset(); d->sourceType = Q3TextStreamPrivate::String; } /*! \obsolete This constructor is equivalent to the constructor taking a QString* parameter. */ Q3TextStream::Q3TextStream( QString& str, int filemode ) { init(); dev = new QStringBuffer( &str ); ((QStringBuffer *)dev)->open( QIODevice::OpenMode(filemode) ); owndev = TRUE; setEncoding(RawUnicode); reset(); d->sourceType = Q3TextStreamPrivate::String; } /*! Constructs a text stream that operates on the byte array, \a a, through an internal QBuffer device. The \a mode argument is passed to the device's open() function; see \l{QIODevice::mode()}. Example: \snippet doc/src/snippets/code/src_qt3support_text_q3textstream.cpp 2 Writing data to the text stream will modify the contents of the array. The array will be expanded when data is written beyond the end of the string. Same example, using a QBuffer: \snippet doc/src/snippets/code/src_qt3support_text_q3textstream.cpp 3 */ Q3TextStream::Q3TextStream( QByteArray &a, int mode ) { init(); QBuffer *buffer = new QBuffer; buffer->setBuffer( &a ); buffer->open( QIODevice::OpenMode(mode) ); dev = buffer; owndev = TRUE; setEncoding( Latin1 ); //### Locale??? reset(); d->sourceType = Q3TextStreamPrivate::ByteArray; } /*! Constructs a text stream that operates on an existing file handle \a fh through an internal QFile device. The \a mode argument is passed to the device's open() function; see \l{QIODevice::mode()}. Note that if you create a Q3TextStream \c cout or another name that is also used for another variable of a different type, some linkers may confuse the two variables, which will often cause crashes. */ Q3TextStream::Q3TextStream( FILE *fh, int mode ) { init(); setEncoding( Locale ); //### dev = new QFile; ((QFile *)dev)->open( QIODevice::OpenMode(mode), fh ); owndev = TRUE; reset(); d->sourceType = Q3TextStreamPrivate::File; } /*! Destroys the text stream. The destructor does not affect the current IO device. */ Q3TextStream::~Q3TextStream() { if ( owndev ) delete dev; delete d; } /*! \since 4.2 Positions the read pointer at the first non-whitespace character. */ void Q3TextStream::skipWhiteSpace() { ts_ungetc( eat_ws() ); } /*! Tries to read \a len characters from the stream and stores them in \a buf. Returns the number of characters really read. \warning There will no QEOF appended if the read reaches the end of the file. EOF is reached when the return value does not equal \a len. */ uint Q3TextStream::ts_getbuf( QChar* buf, uint len ) { if ( len < 1 ) return 0; uint rnum = 0; // the number of QChars really read if ( d && d->ungetcBuf.length() ) { while ( rnum < len && rnum < uint(d->ungetcBuf.length()) ) { *buf = d->ungetcBuf.constref( rnum ); buf++; rnum++; } d->ungetcBuf = d->ungetcBuf.mid( rnum ); if ( rnum >= len ) return rnum; } // we use dev->ungetch() for one of the bytes of the unicode // byte-order mark, but a local unget hack for the other byte: int ungetHack = EOF; if ( doUnicodeHeader ) { doUnicodeHeader = FALSE; // only at the top int c1 = dev->getch(); if ( c1 == EOF ) return rnum; int c2 = dev->getch(); if ( c1 == 0xfe && c2 == 0xff ) { mapper = 0; latin1 = FALSE; internalOrder = QChar::networkOrdered(); networkOrder = TRUE; } else if ( c1 == 0xff && c2 == 0xfe ) { mapper = 0; latin1 = FALSE; internalOrder = !QChar::networkOrdered(); networkOrder = FALSE; } else { if ( c2 != EOF ) { dev->ungetch( c2 ); ungetHack = c1; } else { /* A small bug might hide here. If only the first byte of a file has made it so far, and that first byte is half of the byte-order mark, then the utfness will not be detected. */ dev->ungetch( c1 ); } } } #ifndef QT_NO_TEXTCODEC if ( mapper ) { bool shortRead = FALSE; while( rnum < len ) { QString s; bool readBlock = !( len == 1+rnum ); for (;;) { // for efficiency: normally read a whole block if ( readBlock ) { // guess buffersize; this may be wrong (too small or too // big). But we can handle this (either iterate reading // or use ungetcBuf). // Note that this might cause problems for codecs where // one byte can result in >1 Unicode Characters if bytes // are written to the stream in the meantime (loss of // synchronicity). uint rlen = len - rnum; char *cbuf = new char[ rlen ]; if ( ungetHack != EOF ) { rlen = 1+dev->readBlock( cbuf+1, rlen-1 ); cbuf[0] = (char)ungetHack; ungetHack = EOF; } else { rlen = dev->readBlock( cbuf, rlen ); } s += mapper->toUnicode( cbuf, rlen, &mapperWriteState ); delete[] cbuf; // use buffered reading only for the first time, because we // have to get the stream synchronous again (this is easier // with single character reading) readBlock = FALSE; } // get stream (and codec) in sync int c; if ( ungetHack == EOF ) { c = dev->getch(); } else { c = ungetHack; ungetHack = EOF; } if ( c == EOF ) { shortRead = TRUE; break; } char b = c; uint lengthBefore = s.length(); s += mapper->toUnicode( &b, 1, &mapperWriteState ); if ( uint(s.length()) > lengthBefore ) break; // it seems we are in sync now } uint i = 0; uint end = QMIN( len-rnum, uint(s.length()) ); while( i < end ) { *buf = s.constref(i++); buf++; } rnum += end; if ( uint(s.length()) > i ) { // could be = but append is clearer d->ungetcBuf.append( s.mid( i ) ); } if ( shortRead ) return rnum; } } else #endif if ( latin1 ) { if ( len == 1+rnum ) { // use this method for one character because it is more efficient // (arnt doubts whether it makes a difference, but lets it stand) int c = (ungetHack == EOF) ? dev->getch() : ungetHack; if ( c != EOF ) { *buf = QLatin1Char((char)c); buf++; rnum++; } } else { if ( ungetHack != EOF ) { *buf = QLatin1Char((char)ungetHack); buf++; rnum++; ungetHack = EOF; } char *cbuf = new char[len - rnum]; while ( !dev->atEnd() && rnum < len ) { uint rlen = len - rnum; rlen = dev->readBlock( cbuf, rlen ); char *it = cbuf; char *end = cbuf + rlen; while ( it < end ) { *buf = QLatin1Char(*it); buf++; it++; } rnum += rlen; } delete[] cbuf; } } else { // UCS-2 or UTF-16 if ( len == 1+rnum ) { int c1 = (ungetHack == EOF) ? dev->getch() : ungetHack; if ( c1 == EOF ) return rnum; int c2 = dev->getch(); if ( c2 == EOF ) return rnum; if ( networkOrder ) { *buf = QChar( c2, c1 ); } else { *buf = QChar( c1, c2 ); } buf++; rnum++; } else { char *cbuf = new char[ 2*( len - rnum ) ]; // for paranoids: overflow possible while ( !dev->atEnd() && rnum < len ) { uint rlen = 2 * ( len-rnum ); if ( ungetHack != EOF ) { rlen = 1+dev->readBlock( cbuf+1, rlen-1 ); cbuf[0] = (char)ungetHack; ungetHack = EOF; } else { rlen = dev->readBlock( cbuf, rlen ); } // We can't use an odd number of bytes, so put it back. But // do it only if we are capable of reading more -- normally // there should not be an odd number, but the file might be // truncated or not in UTF-16... if ( (rlen & 1) == 1 ) if ( !dev->atEnd() ) dev->ungetch( cbuf[--rlen] ); uint i = 0; if ( networkOrder ) { while( i < rlen ) { *buf = QChar( cbuf[i+1], cbuf[i] ); buf++; i+=2; } } else { while( i < rlen ) { *buf = QChar( cbuf[i], cbuf[i+1] ); buf++; i+=2; } } rnum += i/2; } delete[] cbuf; } } return rnum; } /*! Tries to read one line, but at most len characters from the stream and stores them in \a buf. Returns the number of characters really read. Newlines are not stripped. There will be a QEOF appended if the read reaches the end of file; this is different to ts_getbuf(). This function works only if a newline (as byte) is also a newline (as resulting character) since it uses QIODevice::readLine(). So use it only for such codecs where this is true! This function is (almost) a no-op for UTF 16. Don't use it if doUnicodeHeader is TRUE! */ uint Q3TextStream::ts_getline( QChar* buf ) { uint rnum=0; // the number of QChars really read char cbuf[ getline_buf_size+1 ]; if ( d && d->ungetcBuf.length() ) { while( rnum < getline_buf_size && rnum < uint(d->ungetcBuf.length()) ) { buf[rnum] = d->ungetcBuf.constref(rnum); rnum++; } d->ungetcBuf = d->ungetcBuf.mid( rnum ); if ( rnum >= getline_buf_size ) return rnum; } #ifndef QT_NO_TEXTCODEC if ( mapper ) { QString s; bool readBlock = TRUE; for (;;) { // for efficiency: try to read a line if ( readBlock ) { int rlen = getline_buf_size - rnum; rlen = dev->readLine( cbuf, rlen+1 ); if ( rlen == -1 ) rlen = 0; s += mapper->toUnicode( cbuf, rlen, &mapperWriteState ); readBlock = FALSE; } if ( dev->atEnd() || s.at( s.length()-1 ) == QLatin1Char('\n') || s.at( s.length()-1 ) == QLatin1Char('\r') ) { break; } else { // get stream (and codec) in sync int c; c = dev->getch(); if ( c == EOF ) { break; } char b = c; uint lengthBefore = s.length(); s += mapper->toUnicode( &b, 1, &mapperWriteState ); if ( uint(s.length()) > lengthBefore ) break; // it seems we are in sync now } } uint i = 0; while( rnum < getline_buf_size && i < uint(s.length()) ) buf[rnum++] = s.constref(i++); if ( uint(s.length()) > i ) // could be = but append is clearer d->ungetcBuf.append( s.mid( i ) ); if ( rnum < getline_buf_size && dev->atEnd() ) buf[rnum++] = QEOF; } else #endif if ( latin1 ) { int rlen = getline_buf_size - rnum; rlen = dev->readLine( cbuf, rlen+1 ); if ( rlen == -1 ) rlen = 0; char *end = cbuf+rlen; char *it = cbuf; buf +=rnum; while ( it != end ) { buf->setCell( *(it++) ); buf->setRow( 0 ); buf++; } rnum += rlen; if ( rnum < getline_buf_size && dev->atEnd() ) buf[1] = QEOF; } return rnum; } /*! Puts one character into the stream. */ void Q3TextStream::ts_putc( QChar c ) { #ifndef QT_NO_TEXTCODEC if ( mapper ) { int len = 1; QString s = c; Q3CString block = mapper->fromUnicode( s.data(), len );//, &mapperReadState ); dev->writeBlock( block ); } else #endif if ( latin1 ) { if ( c.row() ) dev->putch( '?' ); // unknown character else dev->putch( c.cell() ); } else { if ( doUnicodeHeader ) { doUnicodeHeader = FALSE; ts_putc( QChar::ByteOrderMark ); } if ( internalOrder ) { // this case is needed by QStringBuffer dev->writeBlock( (char*)&c, sizeof(QChar) ); } else if ( networkOrder ) { dev->putch( c.row() ); dev->putch( c.cell() ); } else { dev->putch( c.cell() ); dev->putch( c.row() ); } } } /*! Puts one character into the stream. */ void Q3TextStream::ts_putc( int ch ) { ts_putc( QChar((ushort)ch) ); } bool Q3TextStream::ts_isdigit( QChar c ) { return c.isDigit(); } bool Q3TextStream::ts_isspace( QChar c ) { return c.isSpace(); } void Q3TextStream::ts_ungetc( QChar c ) { if ( c.unicode() == 0xffff ) return; d->ungetcBuf.prepend( c ); } /*! \since 4.2 Reads \a len bytes from the stream into \a s and returns a reference to the stream. The buffer \a s must be preallocated. Note that no encoding is done by this function. \warning The behavior of this function is undefined unless the stream's encoding is set to Unicode or Latin1. \sa QIODevice::readBlock() */ Q3TextStream &Q3TextStream::readRawBytes( char *s, uint len ) { dev->readBlock( s, len ); return *this; } /*! \since 4.2 Writes the \a len bytes from \a s to the stream and returns a reference to the stream. Note that no encoding is done by this function. \sa QIODevice::writeBlock() */ Q3TextStream &Q3TextStream::writeRawBytes( const char* s, uint len ) { dev->writeBlock( s, len ); return *this; } Q3TextStream &Q3TextStream::writeBlock( const char* p, uint len ) { if ( doUnicodeHeader ) { doUnicodeHeader = FALSE; if ( !mapper && !latin1 ) { ts_putc( QChar::ByteOrderMark ); } } // QCString and const char * are treated as Latin-1 if ( !mapper && latin1 ) { dev->writeBlock( p, len ); } else if ( !mapper && internalOrder ) { QChar *u = new QChar[len]; for ( uint i = 0; i < len; i++ ) u[i] = QLatin1Char(p[i]); dev->writeBlock( (char*)u, len * sizeof(QChar) ); delete [] u; } #ifndef QT_NO_TEXTCODEC else if (mapper) { QString s = QString::fromLatin1(p, len); int l = len; Q3CString block = mapper->fromUnicode(s.data(), l );//, &mapperReadState ); dev->writeBlock( block ); } #endif else { for ( uint i = 0; i < len; i++ ) ts_putc( (uchar)p[i] ); } return *this; } Q3TextStream &Q3TextStream::writeBlock( const QChar* p, uint len ) { #ifndef QT_NO_TEXTCODEC if ( mapper ) { QConstString s( p, len ); int l = len; Q3CString block = mapper->fromUnicode( s.string().data(), l );//, &mapperReadState ); dev->writeBlock( block ); } else #endif if ( latin1 ) { dev->write(QString( p, len ).toLatin1()); } else if ( internalOrder ) { if ( doUnicodeHeader ) { doUnicodeHeader = FALSE; ts_putc( QChar::ByteOrderMark ); } dev->writeBlock( (char*)p, sizeof(QChar)*len ); } else { for (uint i=0; isourceType = Q3TextStreamPrivate::IODevice; } /*! \since 4.2 Unsets the IO device. Equivalent to setDevice( 0 ). \sa device(), setDevice() */ void Q3TextStream::unsetDevice() { setDevice( 0 ); d->sourceType = Q3TextStreamPrivate::NotSet; } /*! \fn bool Q3TextStream::atEnd() const \since 4.2 Returns TRUE if the IO device has reached the end position (end of the stream or file) or if there is no IO device set; otherwise returns FALSE. \sa QIODevice::atEnd() */ /*!\fn bool Q3TextStream::eof() const \obsolete This function has been renamed to atEnd(). \sa QIODevice::atEnd() */ /***************************************************************************** Q3TextStream read functions *****************************************************************************/ /*! \overload Reads a char \a c from the stream and returns a reference to the stream. Note that whitespace is skipped. */ Q3TextStream &Q3TextStream::operator>>( char &c ) { CHECK_STREAM_PRECOND c = eat_ws().toLatin1(); return *this; } /*! Reads a char \a c from the stream and returns a reference to the stream. Note that whitespace is \e not skipped. */ Q3TextStream &Q3TextStream::operator>>( QChar &c ) { CHECK_STREAM_PRECOND c = ts_getc(); return *this; } ulong Q3TextStream::input_bin() { ulong val = 0; QChar ch = eat_ws(); int dv = ch.digitValue(); while ( dv == 0 || dv == 1 ) { val = ( val << 1 ) + dv; ch = ts_getc(); dv = ch.digitValue(); } if ( ch != QEOF ) ts_ungetc( ch ); return val; } ulong Q3TextStream::input_oct() { ulong val = 0; QChar ch = eat_ws(); int dv = ch.digitValue(); while ( dv >= 0 && dv <= 7 ) { val = ( val << 3 ) + dv; ch = ts_getc(); dv = ch.digitValue(); } if ( dv == 8 || dv == 9 ) { while ( ts_isdigit(ch) ) ch = ts_getc(); } if ( ch != QEOF ) ts_ungetc( ch ); return val; } ulong Q3TextStream::input_dec() { ulong val = 0; QChar ch = eat_ws(); int dv = ch.digitValue(); while ( ts_isdigit(ch) ) { val = val * 10 + dv; ch = ts_getc(); dv = ch.digitValue(); } if ( ch != QEOF ) ts_ungetc( ch ); return val; } ulong Q3TextStream::input_hex() { ulong val = 0; QChar ch = eat_ws(); char c = ch.toLatin1(); while ( isxdigit((uchar) c) ) { val <<= 4; if ( ts_isdigit(QLatin1Char(c)) ) val += c - '0'; else val += 10 + tolower( (uchar) c ) - 'a'; ch = ts_getc(); c = ch.toLatin1(); } if ( ch != QEOF ) ts_ungetc( ch ); return val; } long Q3TextStream::input_int() { long val; QChar ch; char c; switch ( flags() & basefield ) { case bin: val = (long)input_bin(); break; case oct: val = (long)input_oct(); break; case dec: ch = eat_ws(); c = ch.toLatin1(); if ( ch == QEOF ) { val = 0; } else { if ( !(c == '-' || c == '+') ) ts_ungetc( ch ); if ( c == '-' ) { ulong v = input_dec(); if ( v ) { // ensure that LONG_MIN can be read v--; val = -((long)v) - 1; } else { val = 0; } } else { val = (long)input_dec(); } } break; case hex: val = (long)input_hex(); break; default: val = 0; ch = eat_ws(); c = ch.toLatin1(); if ( c == '0' ) { // bin, oct or hex ch = ts_getc(); c = ch.toLatin1(); if ( tolower((uchar) c) == 'x' ) val = (long)input_hex(); else if ( tolower((uchar) c) == 'b' ) val = (long)input_bin(); else { // octal ts_ungetc( ch ); if ( c >= '0' && c <= '7' ) { val = (long)input_oct(); } else { val = 0; } } } else if ( ts_isdigit(ch) ) { ts_ungetc( ch ); val = (long)input_dec(); } else if ( c == '-' || c == '+' ) { ulong v = input_dec(); if ( c == '-' ) { if ( v ) { // ensure that LONG_MIN can be read v--; val = -((long)v) - 1; } else { val = 0; } } else { val = (long)v; } } } return val; } // // We use a table-driven FSM to parse floating point numbers // strtod() cannot be used directly since we're reading from a QIODevice // double Q3TextStream::input_double() { const int Init = 0; // states const int Sign = 1; const int Mantissa = 2; const int Dot = 3; const int Abscissa = 4; const int ExpMark = 5; const int ExpSign = 6; const int Exponent = 7; const int Done = 8; const int InputSign = 1; // input tokens const int InputDigit = 2; const int InputDot = 3; const int InputExp = 4; static const uchar table[8][5] = { /* None InputSign InputDigit InputDot InputExp */ { 0, Sign, Mantissa, Dot, 0, }, // Init { 0, 0, Mantissa, Dot, 0, }, // Sign { Done, Done, Mantissa, Dot, ExpMark,}, // Mantissa { 0, 0, Abscissa, 0, 0, }, // Dot { Done, Done, Abscissa, Done, ExpMark,}, // Abscissa { 0, ExpSign, Exponent, 0, 0, }, // ExpMark { 0, 0, Exponent, 0, 0, }, // ExpSign { Done, Done, Exponent, Done, Done } // Exponent }; int state = Init; // parse state int input; // input token char buf[256]; int i = 0; QChar c = eat_ws(); for (;;) { switch ( c.toLatin1() ) { case '+': case '-': input = InputSign; break; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': input = InputDigit; break; case '.': input = InputDot; break; case 'e': case 'E': input = InputExp; break; default: input = 0; break; } state = table[state][input]; if ( state == 0 || state == Done || i > 250 ) { if ( i > 250 ) { // ignore rest of digits do { c = ts_getc(); } while ( c != QEOF && ts_isdigit(c) ); } if ( c != QEOF ) ts_ungetc( c ); buf[i] = '\0'; char *end; return strtod( buf, &end ); } buf[i++] = c.toLatin1(); c = ts_getc(); } #if !defined(Q_CC_EDG) return 0.0; #endif } /*! \overload Reads a signed \c short integer \a i from the stream and returns a reference to the stream. See flags() for an explanation of the expected input format. */ Q3TextStream &Q3TextStream::operator>>( signed short &i ) { CHECK_STREAM_PRECOND i = (signed short)input_int(); return *this; } /*! \overload Reads an unsigned \c short integer \a i from the stream and returns a reference to the stream. See flags() for an explanation of the expected input format. */ Q3TextStream &Q3TextStream::operator>>( unsigned short &i ) { CHECK_STREAM_PRECOND i = (unsigned short)input_int(); return *this; } /*! \overload Reads a signed \c int \a i from the stream and returns a reference to the stream. See flags() for an explanation of the expected input format. */ Q3TextStream &Q3TextStream::operator>>( signed int &i ) { CHECK_STREAM_PRECOND i = (signed int)input_int(); return *this; } /*! \overload Reads an unsigned \c int \a i from the stream and returns a reference to the stream. See flags() for an explanation of the expected input format. */ Q3TextStream &Q3TextStream::operator>>( unsigned int &i ) { CHECK_STREAM_PRECOND i = (unsigned int)input_int(); return *this; } /*! \overload Reads a signed \c long int \a i from the stream and returns a reference to the stream. See flags() for an explanation of the expected input format. */ Q3TextStream &Q3TextStream::operator>>( signed long &i ) { CHECK_STREAM_PRECOND i = (signed long)input_int(); return *this; } /*! \overload Reads an unsigned \c long int \a i from the stream and returns a reference to the stream. See flags() for an explanation of the expected input format. */ Q3TextStream &Q3TextStream::operator>>( unsigned long &i ) { CHECK_STREAM_PRECOND i = (unsigned long)input_int(); return *this; } /*! \overload Reads a \c float \a f from the stream and returns a reference to the stream. See flags() for an explanation of the expected input format. */ Q3TextStream &Q3TextStream::operator>>( float &f ) { CHECK_STREAM_PRECOND f = (float)input_double(); return *this; } /*! \overload Reads a \c double \a f from the stream and returns a reference to the stream. See flags() for an explanation of the expected input format. */ Q3TextStream &Q3TextStream::operator>>( double &f ) { CHECK_STREAM_PRECOND f = input_double(); return *this; } /*! \overload Reads a "word" from the stream into \a s and returns a reference to the stream. A word consists of characters for which isspace() returns FALSE. */ Q3TextStream &Q3TextStream::operator>>( char *s ) { CHECK_STREAM_PRECOND int maxlen = width( 0 ); QChar c = eat_ws(); if ( !maxlen ) maxlen = -1; while ( c != QEOF ) { if ( ts_isspace(c) || maxlen-- == 0 ) { ts_ungetc( c ); break; } *s++ = c.toLatin1(); c = ts_getc(); } *s = '\0'; return *this; } /*! \overload Reads a "word" from the stream into \a str and returns a reference to the stream. A word consists of characters for which isspace() returns FALSE. */ Q3TextStream &Q3TextStream::operator>>( QString &str ) { CHECK_STREAM_PRECOND str=QString::fromLatin1(""); QChar c = eat_ws(); while ( c != QEOF ) { if ( ts_isspace(c) ) { ts_ungetc( c ); break; } str += c; c = ts_getc(); } return *this; } /*! \overload Reads a "word" from the stream into \a str and returns a reference to the stream. A word consists of characters for which isspace() returns FALSE. */ Q3TextStream &Q3TextStream::operator>>( Q3CString &str ) { CHECK_STREAM_PRECOND Q3CString *dynbuf = 0; const int buflen = 256; char buffer[buflen]; char *s = buffer; int i = 0; QChar c = eat_ws(); while ( c != QEOF ) { if ( ts_isspace(c) ) { ts_ungetc( c ); break; } if ( i >= buflen-1 ) { if ( !dynbuf ) { // create dynamic buffer dynbuf = new Q3CString(buflen*2); memcpy( dynbuf->data(), s, i ); // copy old data } else if ( i >= (int)dynbuf->size()-1 ) { dynbuf->resize( dynbuf->size()*2 ); } s = dynbuf->data(); } s[i++] = c.toLatin1(); c = ts_getc(); } str.resize( i ); memcpy( str.data(), s, i ); delete dynbuf; return *this; } /*! \since 4.2 Reads a line from the stream and returns a string containing the text. The returned string does not contain any trailing newline or carriage return. Note that this is different from QIODevice::readLine(), which does not strip the newline at the end of the line. On EOF you will get a QString that is null. On reading an empty line the returned QString is empty but not null. \sa QIODevice::readLine() */ QString Q3TextStream::readLine() { #if defined(QT_CHECK_STATE) if ( !dev ) { qWarning( "Q3TextStream::readLine: No device" ); return QString::null; } #endif bool readCharByChar = TRUE; QString result; #if 0 if ( !doUnicodeHeader && ( (latin1) || (mapper != 0 && mapper->mibEnum() == 106 ) // UTF 8 ) ) { readCharByChar = FALSE; // use optimized read line QChar c[getline_buf_size]; int pos = 0; bool eof = FALSE; for (;;) { pos = ts_getline( c ); if ( pos == 0 ) { // something went wrong; try fallback readCharByChar = TRUE; //dev->resetStatus(); break; } if ( c[pos-1] == QEOF || c[pos-1] == '\n' ) { if ( pos>2 && c[pos-1]==QEOF && c[pos-2]=='\n' ) { result += QString( c, pos-2 ); } else if ( pos > 1 ) { result += QString( c, pos-1 ); } if ( pos == 1 && c[pos-1] == QEOF ) eof = TRUE; break; } else { result += QString( c, pos ); } } if ( eof && result.isEmpty() ) return QString::null; } #endif if ( readCharByChar ) { const int buf_size = 256; QChar c[buf_size]; int pos = 0; c[pos] = ts_getc(); if ( c[pos] == QEOF ) return QString::null; while ( c[pos] != QEOF && c[pos] != QLatin1Char('\n') ) { if ( c[pos] == QLatin1Char('\r') ) { // ( handle mac and dos ) QChar nextc = ts_getc(); if ( nextc != QLatin1Char('\n') ) ts_ungetc( nextc ); break; } pos++; if ( pos >= buf_size ) { result += QString( c, pos ); pos = 0; } c[pos] = ts_getc(); } result += QString( c, pos ); } return result; } /*! \since 4.2 Reads the entire stream from the current position, and returns a string containing the text. \sa readLine() */ QString Q3TextStream::read() { #if defined(QT_CHECK_STATE) if ( !dev ) { qWarning( "Q3TextStream::read: No device" ); return QString::null; } #endif QString result; const uint bufsize = 512; QChar buf[bufsize]; uint i, num, start; bool skipped_cr = FALSE; for (;;) { num = ts_getbuf(buf,bufsize); // convert dos (\r\n) and mac (\r) style eol to unix style (\n) start = 0; for ( i=0; i>= 1; if ( !n ) break; } if ( flags() & showbase ) { // show base *--p = (flags() & uppercase) ? 'B' : 'b'; *--p = '0'; } break; case I_BASE_8: // output octal number p = &buf[74]; *p = '\0'; do { *--p = (char)(n&7) + '0'; n >>= 3; } while ( n ); if ( flags() & showbase ) *--p = '0'; break; case I_BASE_16: // output hexadecimal number p = &buf[74]; *p = '\0'; hexdigits = (flags() & uppercase) ? hexdigits_upper : hexdigits_lower; do { *--p = hexdigits[(int)n&0xf]; n >>= 4; } while ( n ); if ( flags() & showbase ) { *--p = (flags() & uppercase) ? 'X' : 'x'; *--p = '0'; } break; default: // decimal base is default p = &buf[74]; *p = '\0'; if ( neg ) n = (ulong)(-(long)n); do { *--p = ((int)(n%10)) + '0'; n /= 10; } while ( n ); if ( neg ) *--p = '-'; else if ( flags() & showpos ) *--p = '+'; if ( (flags() & internal) && fwidth && !ts_isdigit(QLatin1Char(*p)) ) { ts_putc( *p ); // special case for internal ++p; // padding fwidth--; return *this << (const char*)p; } } if ( fwidth ) { // adjustment required if ( !(flags() & left) ) { // but NOT left adjustment len = qstrlen(p); int padlen = fwidth - len; if ( padlen <= 0 ) { // no padding required writeBlock( p, len ); } else if ( padlen < (int)(p-buf) ) { // speeds up padding memset( p-padlen, (char)fillchar, padlen ); writeBlock( p-padlen, padlen+len ); } else // standard padding *this << (const char*)p; } else *this << (const char*)p; fwidth = 0; // reset field width } else { writeBlock( p, qstrlen(p) ); } return *this; } /*! \overload \since 4.2 Writes a \c short integer \a i to the stream and returns a reference to the stream. */ Q3TextStream &Q3TextStream::operator<<( signed short i ) { return output_int( I_SHORT | I_SIGNED, i, i < 0 ); } /*! \overload \since 4.2 Writes an \c unsigned \c short integer \a i to the stream and returns a reference to the stream. */ Q3TextStream &Q3TextStream::operator<<( unsigned short i ) { return output_int( I_SHORT | I_UNSIGNED, i, FALSE ); } /*! \overload \since 4.2 Writes an \c int \a i to the stream and returns a reference to the stream. */ Q3TextStream &Q3TextStream::operator<<( signed int i ) { return output_int( I_INT | I_SIGNED, i, i < 0 ); } /*! \overload \since 4.2 Writes an \c unsigned \c int \a i to the stream and returns a reference to the stream. */ Q3TextStream &Q3TextStream::operator<<( unsigned int i ) { return output_int( I_INT | I_UNSIGNED, i, FALSE ); } /*! \overload \since 4.2 Writes a \c long \c int \a i to the stream and returns a reference to the stream. */ Q3TextStream &Q3TextStream::operator<<( signed long i ) { return output_int( I_LONG | I_SIGNED, i, i < 0 ); } /*! \overload \since 4.2 Writes an \c unsigned \c long \c int \a i to the stream and returns a reference to the stream. */ Q3TextStream &Q3TextStream::operator<<( unsigned long i ) { return output_int( I_LONG | I_UNSIGNED, i, FALSE ); } /*! \overload \since 4.2 Writes a \c float \a f to the stream and returns a reference to the stream. */ Q3TextStream &Q3TextStream::operator<<( float f ) { return *this << (double)f; } /*! \overload \since 4.2 Writes a \c double \a f to the stream and returns a reference to the stream. */ Q3TextStream &Q3TextStream::operator<<( double f ) { CHECK_STREAM_PRECOND char f_char; char format[16]; if ( (flags()&floatfield) == fixed ) f_char = 'f'; else if ( (flags()&floatfield) == scientific ) f_char = (flags() & uppercase) ? 'E' : 'e'; else f_char = (flags() & uppercase) ? 'G' : 'g'; register char *fs = format; // generate format string *fs++ = '%'; // "%.l" *fs++ = '.'; int prec = precision(); if ( prec > 99 ) prec = 99; if ( prec >= 10 ) { *fs++ = prec / 10 + '0'; *fs++ = prec % 10 + '0'; } else { *fs++ = prec + '0'; } *fs++ = 'l'; *fs++ = f_char; *fs = '\0'; QString num; num.sprintf(format, f); // convert to text if ( fwidth ) // padding *this << num.latin1(); else // just write it writeBlock(num.latin1(), num.length()); return *this; } /*! \overload \since 4.2 Writes a string to the stream and returns a reference to the stream. The string \a s is assumed to be Latin1 encoded independent of the Encoding set for the Q3TextStream. */ Q3TextStream &Q3TextStream::operator<<( const char* s ) { CHECK_STREAM_PRECOND char padbuf[48]; uint len = qstrlen( s ); // don't write null terminator if ( fwidth ) { // field width set int padlen = fwidth - len; fwidth = 0; // reset width if ( padlen > 0 ) { char *ppad; if ( padlen > 46 ) { // create extra big fill buffer ppad = new char[padlen]; Q_CHECK_PTR( ppad ); } else { ppad = padbuf; } memset( ppad, (char)fillchar, padlen ); // fill with fillchar if ( !(flags() & left) ) { writeBlock( ppad, padlen ); padlen = 0; } writeBlock( s, len ); if ( padlen ) writeBlock( ppad, padlen ); if ( ppad != padbuf ) // delete extra big fill buf delete[] ppad; return *this; } } writeBlock( s, len ); return *this; } /*! \overload \since 4.2 Writes \a s to the stream and returns a reference to the stream. The string \a s is assumed to be Latin1 encoded independent of the Encoding set for the Q3TextStream. */ Q3TextStream &Q3TextStream::operator<<( const Q3CString & s ) { return operator<<(s.data()); } /*! \overload \since 4.2 Writes \a s to the stream and returns a reference to the stream. */ Q3TextStream &Q3TextStream::operator<<( const QString& s ) { if ( !mapper && latin1 ) return operator<<(s.latin1()); CHECK_STREAM_PRECOND QString s1 = s; if ( fwidth ) { // field width set if ( !(flags() & left) ) { s1 = s.rightJustify(fwidth, QLatin1Char((char)fillchar)); } else { s1 = s.leftJustify(fwidth, QLatin1Char((char)fillchar)); } fwidth = 0; // reset width } writeBlock( s1.unicode(), s1.length() ); return *this; } /*! \overload \since 4.2 Writes a pointer to the stream and returns a reference to the stream. The \a ptr is output as an unsigned long hexadecimal integer. */ Q3TextStream &Q3TextStream::operator<<( void *ptr ) { int f = flags(); setf( hex, basefield ); setf( showbase ); unsetf( uppercase ); output_int( I_LONG | I_UNSIGNED, (ulong)ptr, FALSE ); flags( f ); return *this; } /*! \fn int Q3TextStream::flags() const \since 4.2 Returns the current stream flags. The default value is 0. \table \header \i Flag \i Meaning \row \i \c skipws \i Not currently used; whitespace always skipped \row \i \c left \i Numeric fields are left-aligned \row \i \c right \i Not currently used (by default, numerics are right-aligned) \row \i \c internal \i Puts any padding spaces between +/- and value \row \i \c bin \i Output \e and input only in binary \row \i \c oct \i Output \e and input only in octal \row \i \c dec \i Output \e and input only in decimal \row \i \c hex \i Output \e and input only in hexadecimal \row \i \c showbase \i Annotates numeric outputs with 0b, 0, or 0x if in \c bin, \c oct, or \c hex format \row \i \c showpoint \i Not currently used \row \i \c uppercase \i Uses 0B and 0X rather than 0b and 0x \row \i \c showpos \i Shows + for positive numeric values \row \i \c scientific \i Uses scientific notation for floating point values \row \i \c fixed \i Uses fixed-point notation for floating point values \endtable Note that unless \c bin, \c oct, \c dec, or \c hex is set, the input base is octal if the value starts with 0, hexadecimal if it starts with 0x, binary if it starts with 0b, and decimal otherwise. \sa setf(), unsetf() */ /*! \fn int Q3TextStream::flags( int f ) \overload Sets the stream flags to \a f. Returns the previous stream flags. \sa setf(), unsetf(), flags() */ /*! \fn int Q3TextStream::setf( int bits ) \since 4.2 Sets the stream flag bits \a bits. Returns the previous stream flags. Equivalent to \c{flags( flags() | bits )}. \sa unsetf() */ /*! \fn int Q3TextStream::setf( int bits, int mask ) \overload Sets the stream flag bits \a bits with a bit mask \a mask. Returns the previous stream flags. Equivalent to \c{flags( (flags() & ~mask) | (bits & mask) )}. \sa setf(), unsetf() */ /*! \fn int Q3TextStream::unsetf( int bits ) \since 4.2 Clears the stream flag bits \a bits. Returns the previous stream flags. Equivalent to \c{flags( flags() & ~mask )}. \sa setf() */ /*! \fn int Q3TextStream::width() const \since 4.2 Returns the field width. The default value is 0. */ /*! \fn int Q3TextStream::width( int w ) \overload Sets the field width to \a w. Returns the previous field width. */ /*! \fn int Q3TextStream::fill() const \since 4.2 Returns the fill character. The default value is ' ' (space). */ /*! \fn int Q3TextStream::fill( int f ) \overload Sets the fill character to \a f. Returns the previous fill character. */ /*! \fn int Q3TextStream::precision() const \since 4.2 Returns the precision. The default value is 6. */ /*! \fn int Q3TextStream::precision( int p ) \overload Sets the precision to \a p. Returns the previous precision setting. */ Q3TextStream &bin( Q3TextStream &s ) { s.setf(Q3TextStream::bin,Q3TextStream::basefield); return s; } Q3TextStream &oct( Q3TextStream &s ) { s.setf(Q3TextStream::oct,Q3TextStream::basefield); return s; } Q3TextStream &dec( Q3TextStream &s ) { s.setf(Q3TextStream::dec,Q3TextStream::basefield); return s; } Q3TextStream &hex( Q3TextStream &s ) { s.setf(Q3TextStream::hex,Q3TextStream::basefield); return s; } Q3TextStream &endl( Q3TextStream &s ) { return s << '\n'; } Q3TextStream &flush( Q3TextStream &s ) { return s; } Q3TextStream &ws( Q3TextStream &s ) { s.skipWhiteSpace(); return s; } Q3TextStream &reset( Q3TextStream &s ) { s.reset(); return s; } /*! \since 4.2 Sets the encoding of this stream to \a e, where \a e is one of the following values: \table \header \i Encoding \i Meaning \row \i Locale \i Uses local file format (Latin1 if locale is not set), but autodetecting Unicode(utf16) on input. \row \i Unicode \i Uses Unicode(utf16) for input and output. Output will be written in the order most efficient for the current platform (i.e. the order used internally in QString). \row \i UnicodeUTF8 \i Using Unicode(utf8) for input and output. If you use it for input it will autodetect utf16 and use it instead of utf8. \row \i Latin1 \i ISO-8859-1. Will not autodetect utf16. \row \i UnicodeNetworkOrder \i Uses network order Unicode(utf16) for input and output. Useful when reading Unicode data that does not start with the byte order marker. \row \i UnicodeReverse \i Uses reverse network order Unicode(utf16) for input and output. Useful when reading Unicode data that does not start with the byte order marker or when writing data that should be read by buggy Windows applications. \row \i RawUnicode \i Like Unicode, but does not write the byte order marker nor does it auto-detect the byte order. Useful only when writing to non-persistent storage used by a single process. \endtable \c Locale and all Unicode encodings, except \c RawUnicode, will look at the first two bytes in an input stream to determine the byte order. The initial byte order marker will be stripped off before data is read. Note that this function should be called before any data is read to or written from the stream. \sa setCodec() */ void Q3TextStream::setEncoding( Encoding e ) { resetCodecConverterState(&mapperReadState); resetCodecConverterState(&mapperWriteState); if ( d->sourceType == Q3TextStreamPrivate::String ) return; switch ( e ) { case Unicode: mapper = 0; latin1 = FALSE; doUnicodeHeader = TRUE; internalOrder = TRUE; networkOrder = QChar::networkOrdered(); break; case UnicodeUTF8: #ifndef QT_NO_TEXTCODEC mapper = QTextCodec::codecForMib( 106 ); mapperWriteState.flags |= QTextCodec::IgnoreHeader; latin1 = FALSE; doUnicodeHeader = TRUE; internalOrder = TRUE; networkOrder = QChar::networkOrdered(); #else mapper = 0; latin1 = TRUE; doUnicodeHeader = TRUE; #endif break; case UnicodeNetworkOrder: mapper = 0; latin1 = FALSE; doUnicodeHeader = TRUE; internalOrder = QChar::networkOrdered(); networkOrder = TRUE; break; case UnicodeReverse: mapper = 0; latin1 = FALSE; doUnicodeHeader = TRUE; internalOrder = !QChar::networkOrdered(); networkOrder = FALSE; break; case RawUnicode: mapper = 0; latin1 = FALSE; doUnicodeHeader = FALSE; internalOrder = TRUE; networkOrder = QChar::networkOrdered(); break; case Locale: latin1 = TRUE; // fallback to Latin-1 #ifndef QT_NO_TEXTCODEC mapper = QTextCodec::codecForLocale(); mapperReadState.flags |= QTextCodec::IgnoreHeader; mapperWriteState.flags |= QTextCodec::IgnoreHeader; // optimized Latin-1 processing #if defined(Q_OS_WIN32) if ( GetACP() == 1252 ) mapper = 0; #endif if ( mapper && mapper->mibEnum() == 4 ) #endif mapper = 0; doUnicodeHeader = TRUE; // If it reads as Unicode, accept it break; case Latin1: mapper = 0; doUnicodeHeader = FALSE; latin1 = TRUE; break; } } #ifndef QT_NO_TEXTCODEC /*! \since 4.2 Sets the codec for this stream to \a codec. Will not try to autodetect Unicode. Note that this function should be called before any data is read to/written from the stream. \sa setEncoding(), codec() */ void Q3TextStream::setCodec( QTextCodec *codec ) { if ( d->sourceType == Q3TextStreamPrivate::String ) return; // QString does not need any codec mapper = codec; latin1 = ( codec->mibEnum() == 4 ); if ( latin1 ) mapper = 0; doUnicodeHeader = FALSE; } /*! Returns the codec actually used for this stream. \since 4.2 If Unicode is automatically detected in input, a codec with \link QTextCodec::name() name() \endlink "ISO-10646-UCS-2" is returned. \sa setCodec() */ QTextCodec *Q3TextStream::codec() { if ( mapper ) { return mapper; } else { // 4 is "ISO 8859-1", 1000 is "ISO-10646-UCS-2" return QTextCodec::codecForMib( latin1 ? 4 : 1000 ); } } #endif QT_END_NAMESPACE #endif // QT_NO_TEXTSTREAM