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Diffstat (limited to 'src/tools/qtextstream.cpp')
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diff --git a/src/tools/qtextstream.cpp b/src/tools/qtextstream.cpp new file mode 100644 index 000000000..e9865ca77 --- /dev/null +++ b/src/tools/qtextstream.cpp @@ -0,0 +1,2609 @@ +/**************************************************************************** +** +** Implementation of TQTextStream class +** +** Created : 940922 +** +** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved. +** +** This file is part of the tools module of the TQt GUI Toolkit. +** +** This file may be used under the terms of the GNU General +** Public License versions 2.0 or 3.0 as published by the Free +** Software Foundation and appearing in the files LICENSE.GPL2 +** and LICENSE.GPL3 included in the packaging of this file. +** Alternatively you may (at your option) use any later version +** of the GNU General Public License if such license has been +** publicly approved by Trolltech ASA (or its successors, if any) +** and the KDE Free TQt Foundation. +** +** Please review the following information to ensure GNU General +** Public Licensing retquirements will be met: +** http://trolltech.com/products/qt/licenses/licensing/opensource/. +** If you are unsure which license is appropriate for your use, please +** review the following information: +** http://trolltech.com/products/qt/licenses/licensing/licensingoverview +** or contact the sales department at sales@trolltech.com. +** +** This file may be used under the terms of the Q Public License as +** defined by Trolltech ASA and appearing in the file LICENSE.TQPL +** included in the packaging of this file. Licensees holding valid TQt +** Commercial licenses may use this file in accordance with the TQt +** Commercial License Agreement provided with the Software. +** +** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, +** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted +** herein. +** +**********************************************************************/ + +#include "qtextstream.h" + +#ifndef QT_NO_TEXTSTREAM +#include "qtextcodec.h" +#include "qregexp.h" +#include "qbuffer.h" +#include "qfile.h" +#include <stdio.h> +#include <ctype.h> +#include <stdlib.h> +#ifndef Q_OS_TEMP +#include <locale.h> +#endif + +#if defined(Q_OS_WIN32) +#include "qt_windows.h" +#endif + +/*! + \class TQTextStream qtextstream.h + \reentrant + \brief The TQTextStream class provides basic functions for reading + and writing text using a TQIODevice. + + \ingroup io + \ingroup text + \mainclass + + The text stream class has a functional interface that is very + similar to that of the standard C++ iostream class. + + TQt provides several global functions similar to the ones in iostream: + \table + \header \i Function \i Meaning + \row \i bin \i sets the TQTextStream to read/write binary numbers + \row \i oct \i sets the TQTextStream to read/write octal numbers + \row \i dec \i sets the TQTextStream to read/write decimal numbers + \row \i hex \i sets the TQTextStream to read/write hexadecimal numbers + \row \i endl \i forces a line break + \row \i flush \i forces the TQIODevice to flush any buffered data + \row \i ws \i eats any available whitespace (on input) + \row \i reset \i resets the TQTextStream 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 TQTextStream 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 TQTextStream class reads and writes text; it is not appropriate + for dealing with binary data (but TQDataStream is). + + By default, output of Unicode text (i.e. TQString) is done using + the local 8-bit encoding. This can be changed using the + setEncoding() method. For input, the TQTextStream will auto-detect + standard Unicode "byte order marked" text files; otherwise the + local 8-bit encoding is used. + + The TQIODevice 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 TQDataStream +*/ + +/*! + \enum TQTextStream::Encoding + + \value Locale + \value Latin1 + \value Unicode + \value UnicodeNetworkOrder + \value UnicodeReverse + \value RawUnicode + \value UnicodeUTF8 + + See setEncoding() for an explanation of the encodings. +*/ + +/* + \class TQTSManip + + \brief The TQTSManip class is an internal helper class for the + TQTextStream. + + It is generally a very bad idea to use this class directly in + application programs. + + \internal + + This class makes it possible to give the TQTextStream function objects + with arguments, like this: + \code + TQTextStream cout( stdout, IO_WriteOnly ); + cout << setprecision( 8 ); // TQTSManip used here! + cout << 3.14159265358979323846; + \endcode + + The setprecision() function returns a TQTSManip object. + The TQTSManip object contains a pointer to a member function in + TQTextStream and an integer argument. + When serializing a TQTSManip into a TQTextStream, the function + is executed with the argument. +*/ + +/*! \fn TQTSManip::TQTSManip( TQTSMFI m, int a ) + + Constructs a TQTSManip object which will call \a m (a member function + in TQTextStream which accepts a single int) with argument \a a when + TQTSManip::exec() is called. Used internally in e.g. endl: + + \code + s << "some text" << endl << "more text"; + \endcode +*/ + +/*! \fn void TQTSManip::exec( TQTextStream& s ) + + Calls the member function specified in the constructor, for object + \a s. Used internally in e.g. endl: + + \code + s << "some text" << endl << "more text"; + \endcode +*/ + + +/***************************************************************************** + TQTextStream member functions + *****************************************************************************/ + +#if defined(QT_CHECK_STATE) +#undef CHECK_STREAM_PRECOND +#define CHECK_STREAM_PRECOND if ( !dev ) { \ + qWarning( "TQTextStream: 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 TQTS::bin +#define I_BASE_8 TQTS::oct +#define I_BASE_10 TQTS::dec +#define I_BASE_16 TQTS::hex +#define I_BASE_MASK (TQTS::bin | TQTS::oct | TQTS::dec | TQTS::hex) + +#define I_SIGNED 0x0100 +#define I_UNSIGNED 0x0200 +#define I_SIGN_MASK 0x0f00 + + +static const TQChar TQEOF = TQChar((ushort)0xffff); //guaranteed not to be a character. +static const uint getline_buf_size = 256; // bufsize used by ts_getline() + +const int TQTextStream::basefield = I_BASE_MASK; +const int TQTextStream::adjustfield = ( TQTextStream::left | + TQTextStream::right | + TQTextStream::internal ); +const int TQTextStream::floatfield = ( TQTextStream::scientific | + TQTextStream::fixed ); + + +class TQTextStreamPrivate { +public: +#ifndef QT_NO_TEXTCODEC + TQTextStreamPrivate() + : decoder( 0 ), encoder( 0 ), sourceType( NotSet ) { } + ~TQTextStreamPrivate() { + delete decoder; + delete encoder; + } + TQTextDecoder *decoder; + TQTextEncoder *encoder; +#else + TQTextStreamPrivate() : sourceType( NotSet ) { } + ~TQTextStreamPrivate() { } +#endif + TQString ungetcBuf; + + enum SourceType { NotSet, IODevice, String, ByteArray, File }; + SourceType sourceType; +}; + + +// skips whitespace and returns the first non-whitespace character +TQChar TQTextStream::eat_ws() +{ + TQChar c; + do { c = ts_getc(); } while ( c != TQEOF && ts_isspace(c) ); + return c; +} + +void TQTextStream::init() +{ + // ### ungetcBuf = TQEOF; + dev = 0; + owndev = FALSE; + mapper = 0; + d = new TQTextStreamPrivate; + doUnicodeHeader = TRUE; // autodetect + latin1 = TRUE; // should use locale? + internalOrder = TQChar::networkOrdered(); + networkOrder = TRUE; +} + +/*! + Constructs a data stream that has no IO device. +*/ + +TQTextStream::TQTextStream() +{ + init(); + setEncoding( Locale ); + reset(); + d->sourceType = TQTextStreamPrivate::NotSet; +} + +/*! + Constructs a text stream that uses the IO device \a iod. +*/ + +TQTextStream::TQTextStream( TQIODevice *iod ) +{ + init(); + setEncoding( Locale ); + dev = iod; + reset(); + d->sourceType = TQTextStreamPrivate::IODevice; +} + +// TODO: use special-case handling of this case in TQTextStream, and +// simplify this class to only deal with TQChar or TQString data. +class TQStringBuffer : public TQIODevice { +public: + TQStringBuffer( TQString* str ); + ~TQStringBuffer(); + bool open( int m ); + void close(); + void flush(); + Offset size() const; + Offset at() const; + bool at( Offset pos ); + Q_LONG readBlock( char *p, Q_ULONG len ); + Q_LONG writeBlock( const char *p, Q_ULONG len ); + int getch(); + int putch( int ch ); + int ungetch( int ch ); +protected: + TQString* s; + +private: + TQStringBuffer( const TQStringBuffer & ); + TQStringBuffer &operator=( const TQStringBuffer & ); +}; + + +TQStringBuffer::TQStringBuffer( TQString* str ) +{ + s = str; +} + +TQStringBuffer::~TQStringBuffer() +{ +} + + +bool TQStringBuffer::open( int m ) +{ + if ( !s ) { +#if defined(QT_CHECK_STATE) + qWarning( "TQStringBuffer::open: No string" ); +#endif + return FALSE; + } + if ( isOpen() ) { +#if defined(QT_CHECK_STATE) + qWarning( "TQStringBuffer::open: Buffer already open" ); +#endif + return FALSE; + } + setMode( m ); + if ( m & IO_Truncate ) + s->truncate( 0 ); + + if ( m & IO_Append ) { + ioIndex = s->length()*sizeof(TQChar); + } else { + ioIndex = 0; + } + setState( IO_Open ); + resetStatus(); + return TRUE; +} + +void TQStringBuffer::close() +{ + if ( isOpen() ) { + setFlags( IO_Direct ); + ioIndex = 0; + } +} + +void TQStringBuffer::flush() +{ +} + +TQIODevice::Offset TQStringBuffer::size() const +{ + return s ? s->length()*sizeof(TQChar) : 0; +} + +TQIODevice::Offset TQStringBuffer::at() const +{ + return ioIndex; +} + +bool TQStringBuffer::at( Offset pos ) +{ +#if defined(QT_CHECK_STATE) + if ( !isOpen() ) { + qWarning( "TQStringBuffer::at: Buffer is not open" ); + return FALSE; + } +#endif + if ( pos >= s->length()*2 ) { +#if defined(QT_CHECK_RANGE) +#if defined(QT_ABI_QT4) + qWarning( "TQStringBuffer::at: Index %lld out of range", pos ); +#else + qWarning( "TQStringBuffer::at: Index %lu out of range", pos ); +#endif +#endif + return FALSE; + } + ioIndex = pos; + return TRUE; +} + + +Q_LONG TQStringBuffer::readBlock( char *p, Q_ULONG len ) +{ +#if defined(QT_CHECK_STATE) + Q_CHECK_PTR( p ); + if ( !isOpen() ) { + qWarning( "TQStringBuffer::readBlock: Buffer not open" ); + return -1; + } + if ( !isReadable() ) { + qWarning( "TQStringBuffer::readBlock: Read operation not permitted" ); + return -1; + } +#endif + if ( ioIndex + len > s->length()*sizeof(TQChar) ) { + // overflow + if ( (uint)ioIndex >= s->length()*sizeof(TQChar) ) { + setStatus( IO_ReadError ); + return -1; + } else { + len = s->length()*2 - (uint)ioIndex; + } + } + memcpy( p, ((const char*)(s->unicode()))+ioIndex, len ); + ioIndex += len; + return len; +} + +Q_LONG TQStringBuffer::writeBlock( const char *p, Q_ULONG len ) +{ +#if defined(QT_CHECK_NULL) + if ( p == 0 && len != 0 ) + qWarning( "TQStringBuffer::writeBlock: Null pointer error" ); +#endif +#if defined(QT_CHECK_STATE) + if ( !isOpen() ) { + qWarning( "TQStringBuffer::writeBlock: Buffer not open" ); + return -1; + } + if ( !isWritable() ) { + qWarning( "TQStringBuffer::writeBlock: Write operation not permitted" ); + return -1; + } + if ( ioIndex&1 ) { + qWarning( "TQStringBuffer::writeBlock: non-even index - non Unicode" ); + return -1; + } + if ( len&1 ) { + qWarning( "TQStringBuffer::writeBlock: non-even length - non Unicode" ); + return -1; + } +#endif + s->replace(ioIndex/2, len/2, (TQChar*)p, len/2); + ioIndex += len; + return len; +} + +int TQStringBuffer::getch() +{ +#if defined(QT_CHECK_STATE) + if ( !isOpen() ) { + qWarning( "TQStringBuffer::getch: Buffer not open" ); + return -1; + } + if ( !isReadable() ) { + qWarning( "TQStringBuffer::getch: Read operation not permitted" ); + return -1; + } +#endif + if ( (uint)ioIndex >= s->length()*2 ) { // overflow + setStatus( IO_ReadError ); + return -1; + } + return (int)((const uchar *)s->unicode())[ioIndex++]; +} + +int TQStringBuffer::putch( int ch ) +{ + char c = ch; + if ( writeBlock(&c,1) < 0 ) + return -1; + else + return ch; +} + +int TQStringBuffer::ungetch( int ch ) +{ +#if defined(QT_CHECK_STATE) + if ( !isOpen() ) { + qWarning( "TQStringBuffer::ungetch: Buffer not open" ); + return -1; + } + if ( !isReadable() ) { + qWarning( "TQStringBuffer::ungetch: Read operation not permitted" ); + return -1; + } +#endif + if ( ch != -1 ) { // something to do with eof + if ( ioIndex ) + ioIndex--; + else + ch = -1; + } + return ch; +} + + +/*! + Constructs a text stream that operates on the Unicode TQString, \a + str, through an internal device. The \a filemode argument is + passed to the device's open() function; see \l{TQIODevice::mode()}. + + If you set an encoding or codec with setEncoding() or setCodec(), + this setting is ignored for text streams that operate on TQString. + + Example: + \code + TQString str; + TQTextStream ts( &str, IO_WriteOnly ); + ts << "pi = " << 3.14; // str == "pi = 3.14" + \endcode + + 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: + \code + TQString str = "pi = 3.14"; + TQTextStream ts( &str, IO_WriteOnly ); + ts << "2+2 = " << 2+2; // str == "2+2 = 414" + \endcode + + Note that because TQString is Unicode, you should not use + readRawBytes() or writeRawBytes() on such a stream. +*/ + +TQTextStream::TQTextStream( TQString* str, int filemode ) +{ + // TODO: optimize for this case as it becomes more common + // (see TQStringBuffer above) + init(); + dev = new TQStringBuffer( str ); + ((TQStringBuffer *)dev)->open( filemode ); + owndev = TRUE; + setEncoding(RawUnicode); + reset(); + d->sourceType = TQTextStreamPrivate::String; +} + +/*! \obsolete + + This constructor is equivalent to the constructor taking a TQString* + parameter. +*/ + +TQTextStream::TQTextStream( TQString& str, int filemode ) +{ + init(); + dev = new TQStringBuffer( &str ); + ((TQStringBuffer *)dev)->open( filemode ); + owndev = TRUE; + setEncoding(RawUnicode); + reset(); + d->sourceType = TQTextStreamPrivate::String; +} + +/*! + Constructs a text stream that operates on the byte array, \a a, + through an internal TQBuffer device. The \a mode argument is passed + to the device's open() function; see \l{TQIODevice::mode()}. + + Example: + \code + TQByteArray array; + TQTextStream ts( array, IO_WriteOnly ); + ts << "pi = " << 3.14 << '\0'; // array == "pi = 3.14" + \endcode + + 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 TQBuffer: + \code + TQByteArray array; + TQBuffer buf( array ); + buf.open( IO_WriteOnly ); + TQTextStream ts( &buf ); + ts << "pi = " << 3.14 << '\0'; // array == "pi = 3.14" + buf.close(); + \endcode +*/ + +TQTextStream::TQTextStream( TQByteArray a, int mode ) +{ + init(); + dev = new TQBuffer( a ); + ((TQBuffer *)dev)->open( mode ); + owndev = TRUE; + setEncoding( Latin1 ); //### Locale??? + reset(); + d->sourceType = TQTextStreamPrivate::ByteArray; +} + +/*! + Constructs a text stream that operates on an existing file handle + \a fh through an internal TQFile device. The \a mode argument is + passed to the device's open() function; see \l{TQIODevice::mode()}. + + Note that if you create a TQTextStream \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. +*/ + +TQTextStream::TQTextStream( FILE *fh, int mode ) +{ + init(); + setEncoding( Locale ); //### + dev = new TQFile; + ((TQFile *)dev)->open( mode, fh ); + owndev = TRUE; + reset(); + d->sourceType = TQTextStreamPrivate::File; +} + +/*! + Destroys the text stream. + + The destructor does not affect the current IO device. +*/ + +TQTextStream::~TQTextStream() +{ + if ( owndev ) + delete dev; + delete d; +} + +/*! + Positions the read pointer at the first non-whitespace character. +*/ +void TQTextStream::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 TQEOF appended if the read reaches the end + of the file. EOF is reached when the return value does not equal + \a len. +*/ +uint TQTextStream::ts_getbuf( TQChar* buf, uint len ) +{ + if ( len < 1 ) + return 0; + + uint rnum = 0; // the number of TQChars really read + + if ( d && d->ungetcBuf.length() ) { + while ( rnum < len && rnum < 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 = TQChar::networkOrdered(); + networkOrder = TRUE; + } else if ( c1 == 0xff && c2 == 0xfe ) { + mapper = 0; + latin1 = FALSE; + internalOrder = !TQChar::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; + if ( !d->decoder ) + d->decoder = mapper->makeDecoder(); + while( rnum < len ) { + TQString 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 += d->decoder->toUnicode( cbuf, rlen ); + 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 += d->decoder->toUnicode( &b, 1 ); + if ( s.length() > lengthBefore ) + break; // it seems we are in sync now + } + uint i = 0; + uint end = TQMIN( len-rnum, s.length() ); + while( i < end ) { + *buf = s.constref(i++); + buf++; + } + rnum += end; + if ( 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 = (char)c; + buf++; + rnum++; + } + } else { + if ( ungetHack != EOF ) { + *buf = (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 = *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 = TQChar( c2, c1 ); + } else { + *buf = TQChar( 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 = TQChar( cbuf[i+1], cbuf[i] ); + buf++; + i+=2; + } + } else { + while( i < rlen ) { + *buf = TQChar( 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 TQEOF 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 TQIODevice::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 TQTextStream::ts_getline( TQChar* buf ) +{ + uint rnum=0; // the number of TQChars really read + char cbuf[ getline_buf_size+1 ]; + + if ( d && d->ungetcBuf.length() ) { + while( rnum < getline_buf_size && rnum < 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 ) { + if ( !d->decoder ) + d->decoder = mapper->makeDecoder(); + TQString 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 += d->decoder->toUnicode( cbuf, rlen ); + readBlock = FALSE; + } + if ( dev->atEnd() + || s.at( s.length()-1 ) == '\n' + || s.at( s.length()-1 ) == '\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 += d->decoder->toUnicode( &b, 1 ); + if ( s.length() > lengthBefore ) + break; // it seems we are in sync now + } + } + uint i = 0; + while( rnum < getline_buf_size && i < s.length() ) + buf[rnum++] = s.constref(i++); + if ( s.length() > i ) + // could be = but append is clearer + d->ungetcBuf.append( s.mid( i ) ); + if ( rnum < getline_buf_size && dev->atEnd() ) + buf[rnum++] = TQEOF; + } 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] = TQEOF; + } + return rnum; +} + + +/*! + Puts one character into the stream. +*/ +void TQTextStream::ts_putc( TQChar c ) +{ +#ifndef QT_NO_TEXTCODEC + if ( mapper ) { + if ( !d->encoder ) + d->encoder = mapper->makeEncoder(); + int len = 1; + TQString s = c; + TQCString block = d->encoder->fromUnicode( s, len ); + dev->writeBlock( block, len ); + } else +#endif + if ( latin1 ) { + if ( c.row() ) + dev->putch( '?' ); // unknown character + else + dev->putch( c.cell() ); + } else { + if ( doUnicodeHeader ) { + doUnicodeHeader = FALSE; + ts_putc( TQChar::byteOrderMark ); + } + if ( internalOrder ) { + // this case is needed by TQStringBuffer + dev->writeBlock( (char*)&c, sizeof(TQChar) ); + } 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 TQTextStream::ts_putc( int ch ) +{ + ts_putc( TQChar((ushort)ch) ); +} + +bool TQTextStream::ts_isdigit( TQChar c ) +{ + return c.isDigit(); +} + +bool TQTextStream::ts_isspace( TQChar c ) +{ + return c.isSpace(); +} + +void TQTextStream::ts_ungetc( TQChar c ) +{ + if ( c.unicode() == 0xffff ) + return; + + d->ungetcBuf.prepend( c ); +} + + + +/*! + 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 TQIODevice::readBlock() +*/ + +TQTextStream &TQTextStream::readRawBytes( char *s, uint len ) +{ + dev->readBlock( s, len ); + return *this; +} + +/*! + 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 TQIODevice::writeBlock() +*/ + +TQTextStream &TQTextStream::writeRawBytes( const char* s, uint len ) +{ + dev->writeBlock( s, len ); + return *this; +} + + +TQTextStream &TQTextStream::writeBlock( const char* p, uint len ) +{ + if ( doUnicodeHeader ) { + doUnicodeHeader = FALSE; + if ( !mapper && !latin1 ) + ts_putc( TQChar::byteOrderMark ); + } + // TQCString and const char * are treated as Latin-1 + if ( !mapper && latin1 ) { + dev->writeBlock( p, len ); + } else if ( !mapper && internalOrder ) { + TQChar *u = new TQChar[len]; + for ( uint i = 0; i < len; i++ ) + u[i] = p[i]; + dev->writeBlock( (char*)u, len * sizeof(TQChar) ); + delete [] u; + } +#ifndef QT_NO_TEXTCODEC + else if (mapper) { + if (!d->encoder) + d->encoder = mapper->makeEncoder(); + TQString s = TQString::fromLatin1(p, len); + int l = len; + TQCString block = d->encoder->fromUnicode(s, l); + dev->writeBlock(block, l); + } +#endif + else { + for ( uint i = 0; i < len; i++ ) + ts_putc( (uchar)p[i] ); + } + return *this; +} + +TQTextStream &TQTextStream::writeBlock( const TQChar* p, uint len ) +{ +#ifndef QT_NO_TEXTCODEC + if ( mapper ) { + if ( !d->encoder ) + d->encoder = mapper->makeEncoder(); + TQConstString s( p, len ); + int l = len; + TQCString block = d->encoder->fromUnicode( s.string(), l ); + dev->writeBlock( block, l ); + } else +#endif + if ( latin1 ) { + char *str = TQString::unicodeToLatin1( p, len ); + dev->writeBlock( str, len ); + delete [] str; + } else if ( internalOrder ) { + if ( doUnicodeHeader ) { + doUnicodeHeader = FALSE; + ts_putc( TQChar::byteOrderMark ); + } + dev->writeBlock( (char*)p, sizeof(TQChar)*len ); + } else { + for (uint i=0; i<len; i++) + ts_putc( p[i] ); + } + return *this; +} + +/*! + Resets the text stream. + + \list + \i All flags are set to 0. + \i The field width is set to 0. + \i The fill character is set to ' ' (Space). + \i The precision is set to 6. + \endlist + + \sa setf(), width(), fill(), precision() +*/ + +void TQTextStream::reset() +{ + fflags = 0; + fwidth = 0; + fillchar = ' '; + fprec = 6; +} + +/*! + \fn TQIODevice *TQTextStream::device() const + + Returns the IO device currently set. + + \sa setDevice(), unsetDevice() +*/ + +/*! + Sets the IO device to \a iod. + + \sa device(), unsetDevice() +*/ + +void TQTextStream::setDevice( TQIODevice *iod ) +{ + if ( owndev ) { + delete dev; + owndev = FALSE; + } + dev = iod; + d->sourceType = TQTextStreamPrivate::IODevice; +} + +/*! + Unsets the IO device. Equivalent to setDevice( 0 ). + + \sa device(), setDevice() +*/ + +void TQTextStream::unsetDevice() +{ + setDevice( 0 ); + d->sourceType = TQTextStreamPrivate::NotSet; +} + +/*! + \fn bool TQTextStream::atEnd() const + + 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 TQIODevice::atEnd() +*/ + +/*!\fn bool TQTextStream::eof() const + + \obsolete + + This function has been renamed to atEnd(). + + \sa TQIODevice::atEnd() +*/ + +/***************************************************************************** + TQTextStream read functions + *****************************************************************************/ + + +/*! + \overload + + Reads a char \a c from the stream and returns a reference to the + stream. Note that whitespace is skipped. +*/ + +TQTextStream &TQTextStream::operator>>( char &c ) +{ + CHECK_STREAM_PRECOND + c = eat_ws(); + return *this; +} + +/*! + Reads a char \a c from the stream and returns a reference to the + stream. Note that whitespace is \e not skipped. +*/ + +TQTextStream &TQTextStream::operator>>( TQChar &c ) +{ + CHECK_STREAM_PRECOND + c = ts_getc(); + return *this; +} + + +ulong TQTextStream::input_bin() +{ + ulong val = 0; + TQChar ch = eat_ws(); + int dv = ch.digitValue(); + while ( dv == 0 || dv == 1 ) { + val = ( val << 1 ) + dv; + ch = ts_getc(); + dv = ch.digitValue(); + } + if ( ch != TQEOF ) + ts_ungetc( ch ); + return val; +} + +ulong TQTextStream::input_oct() +{ + ulong val = 0; + TQChar 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 != TQEOF ) + ts_ungetc( ch ); + return val; +} + +ulong TQTextStream::input_dec() +{ + ulong val = 0; + TQChar ch = eat_ws(); + int dv = ch.digitValue(); + while ( ts_isdigit(ch) ) { + val = val * 10 + dv; + ch = ts_getc(); + dv = ch.digitValue(); + } + if ( ch != TQEOF ) + ts_ungetc( ch ); + return val; +} + +ulong TQTextStream::input_hex() +{ + ulong val = 0; + TQChar ch = eat_ws(); + char c = ch; + while ( isxdigit((uchar) c) ) { + val <<= 4; + if ( ts_isdigit(c) ) + val += c - '0'; + else + val += 10 + tolower( (uchar) c ) - 'a'; + c = ch = ts_getc(); + } + if ( ch != TQEOF ) + ts_ungetc( ch ); + return val; +} + +long TQTextStream::input_int() +{ + long val; + TQChar ch; + char c; + switch ( flags() & basefield ) { + case bin: + val = (long)input_bin(); + break; + case oct: + val = (long)input_oct(); + break; + case dec: + c = ch = eat_ws(); + if ( ch == TQEOF ) { + 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; + c = ch = eat_ws(); + if ( c == '0' ) { // bin, oct or hex + c = ch = ts_getc(); + 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 TQIODevice +// + +double TQTextStream::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; + TQChar c = eat_ws(); + + for (;;) { + + switch ( c ) { + 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 != TQEOF && ts_isdigit(c) ); + } + if ( c != TQEOF ) + ts_ungetc( c ); + buf[i] = '\0'; + char *end; + return strtod( buf, &end ); + } + + buf[i++] = c; + 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. +*/ + +TQTextStream &TQTextStream::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. +*/ + +TQTextStream &TQTextStream::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. +*/ + +TQTextStream &TQTextStream::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. +*/ + +TQTextStream &TQTextStream::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. +*/ + +TQTextStream &TQTextStream::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. +*/ + +TQTextStream &TQTextStream::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. +*/ + +TQTextStream &TQTextStream::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. +*/ + +TQTextStream &TQTextStream::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. +*/ + +TQTextStream &TQTextStream::operator>>( char *s ) +{ + CHECK_STREAM_PRECOND + int maxlen = width( 0 ); + TQChar c = eat_ws(); + if ( !maxlen ) + maxlen = -1; + while ( c != TQEOF ) { + if ( ts_isspace(c) || maxlen-- == 0 ) { + ts_ungetc( c ); + break; + } + *s++ = c; + 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. +*/ + +TQTextStream &TQTextStream::operator>>( TQString &str ) +{ + CHECK_STREAM_PRECOND + str=TQString::fromLatin1(""); + TQChar c = eat_ws(); + + while ( c != TQEOF ) { + 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. +*/ + +TQTextStream &TQTextStream::operator>>( TQCString &str ) +{ + CHECK_STREAM_PRECOND + TQCString *dynbuf = 0; + const int buflen = 256; + char buffer[buflen]; + char *s = buffer; + int i = 0; + TQChar c = eat_ws(); + + while ( c != TQEOF ) { + if ( ts_isspace(c) ) { + ts_ungetc( c ); + break; + } + if ( i >= buflen-1 ) { + if ( !dynbuf ) { // create dynamic buffer + dynbuf = new TQCString(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; + c = ts_getc(); + } + str.resize( i+1 ); + memcpy( str.data(), s, i ); + delete dynbuf; + return *this; +} + + +/*! + 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 + TQIODevice::readLine(), which does not strip the newline at the end + of the line. + + On EOF you will get a TQString that is null. On reading an empty + line the returned TQString is empty but not null. + + \sa TQIODevice::readLine() +*/ + +TQString TQTextStream::readLine() +{ +#if defined(QT_CHECK_STATE) + if ( !dev ) { + qWarning( "TQTextStream::readLine: No device" ); + return TQString::null; + } +#endif + bool readCharByChar = TRUE; + TQString result; +#if 0 + if ( !doUnicodeHeader && ( + (latin1) || + (mapper != 0 && mapper->mibEnum() == 106 ) // UTF 8 + ) ) { + readCharByChar = FALSE; + // use optimized read line + TQChar 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] == TQEOF || c[pos-1] == '\n' ) { + if ( pos>2 && c[pos-1]==TQEOF && c[pos-2]=='\n' ) { + result += TQString( c, pos-2 ); + } else if ( pos > 1 ) { + result += TQString( c, pos-1 ); + } + if ( pos == 1 && c[pos-1] == TQEOF ) + eof = TRUE; + break; + } else { + result += TQString( c, pos ); + } + } + if ( eof && result.isEmpty() ) + return TQString::null; + } +#endif + if ( readCharByChar ) { + const int buf_size = 256; + TQChar c[buf_size]; + int pos = 0; + + c[pos] = ts_getc(); + if ( c[pos] == TQEOF ) + return TQString::null; + + while ( c[pos] != TQEOF && c[pos] != '\n' ) { + if ( c[pos] == '\r' ) { // ( handle mac and dos ) + TQChar nextc = ts_getc(); + if ( nextc != '\n' ) + ts_ungetc( nextc ); + break; + } + pos++; + if ( pos >= buf_size ) { + result += TQString( c, pos ); + pos = 0; + } + c[pos] = ts_getc(); + } + result += TQString( c, pos ); + } + + return result; +} + + +/*! + Reads the entire stream from the current position, and returns a string + containing the text. + + \sa TQIODevice::readLine() +*/ + +TQString TQTextStream::read() +{ +#if defined(QT_CHECK_STATE) + if ( !dev ) { + qWarning( "TQTextStream::read: No device" ); + return TQString::null; + } +#endif + TQString result; + const uint bufsize = 512; + TQChar 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<num; i++ ) { + if ( buf[i] == '\r' ) { + // Only skip single cr's preceding lf's + if ( skipped_cr ) { + result += buf[i]; + start++; + } else { + result += TQString( &buf[start], i-start ); + start = i+1; + skipped_cr = TRUE; + } + } else { + if ( skipped_cr ) { + if ( buf[i] != '\n' ) { + // Should not have skipped it + result += '\n'; + } + skipped_cr = FALSE; + } + } + } + if ( start < num ) + result += TQString( &buf[start], i-start ); + if ( num != bufsize ) // if ( EOF ) + break; + } + return result; +} + + + +/***************************************************************************** + TQTextStream write functions + *****************************************************************************/ + +/*! + Writes character \c char to the stream and returns a reference to + the stream. + + The character \a c is assumed to be Latin1 encoded independent of + the Encoding set for the TQTextStream. +*/ +TQTextStream &TQTextStream::operator<<( TQChar c ) +{ + CHECK_STREAM_PRECOND + ts_putc( c ); + return *this; +} + +/*! + \overload + + Writes character \a c to the stream and returns a reference to the + stream. +*/ +TQTextStream &TQTextStream::operator<<( char c ) +{ + CHECK_STREAM_PRECOND + unsigned char uc = (unsigned char) c; + ts_putc( uc ); + return *this; +} + +TQTextStream &TQTextStream::output_int( int format, ulong n, bool neg ) +{ + static const char hexdigits_lower[] = "0123456789abcdef"; + static const char hexdigits_upper[] = "0123456789ABCDEF"; + CHECK_STREAM_PRECOND + char buf[76]; + register char *p; + int len; + const char *hexdigits; + + switch ( flags() & I_BASE_MASK ) { + + case I_BASE_2: // output binary number + switch ( format & I_TYPE_MASK ) { + case I_SHORT: len=16; break; + case I_INT: len=sizeof(int)*8; break; + case I_LONG: len=32; break; + default: len = 0; + } + p = &buf[74]; // go reverse order + *p = '\0'; + while ( len-- ) { + *--p = (char)(n&1) + '0'; + n >>= 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(*p) ) { + ts_putc( *p ); // special case for internal + ++p; // padding + fwidth--; + return *this << (const char*)p; + } + } + if ( fwidth ) { // adjustment retquired + if ( !(flags() & left) ) { // but NOT left adjustment + len = qstrlen(p); + int padlen = fwidth - len; + if ( padlen <= 0 ) { // no padding retquired + 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 + + Writes a \c short integer \a i to the stream and returns a + reference to the stream. +*/ + +TQTextStream &TQTextStream::operator<<( signed short i ) +{ + return output_int( I_SHORT | I_SIGNED, i, i < 0 ); +} + + +/*! + \overload + + Writes an \c unsigned \c short integer \a i to the stream and + returns a reference to the stream. +*/ + +TQTextStream &TQTextStream::operator<<( unsigned short i ) +{ + return output_int( I_SHORT | I_UNSIGNED, i, FALSE ); +} + + +/*! + \overload + + Writes an \c int \a i to the stream and returns a reference to the + stream. +*/ + +TQTextStream &TQTextStream::operator<<( signed int i ) +{ + return output_int( I_INT | I_SIGNED, i, i < 0 ); +} + + +/*! + \overload + + Writes an \c unsigned \c int \a i to the stream and returns a + reference to the stream. +*/ + +TQTextStream &TQTextStream::operator<<( unsigned int i ) +{ + return output_int( I_INT | I_UNSIGNED, i, FALSE ); +} + + +/*! + \overload + + Writes a \c long \c int \a i to the stream and returns a reference + to the stream. +*/ + +TQTextStream &TQTextStream::operator<<( signed long i ) +{ + return output_int( I_LONG | I_SIGNED, i, i < 0 ); +} + + +/*! + \overload + + Writes an \c unsigned \c long \c int \a i to the stream and + returns a reference to the stream. +*/ + +TQTextStream &TQTextStream::operator<<( unsigned long i ) +{ + return output_int( I_LONG | I_UNSIGNED, i, FALSE ); +} + + +/*! + \overload + + Writes a \c float \a f to the stream and returns a reference to + the stream. +*/ + +TQTextStream &TQTextStream::operator<<( float f ) +{ + return *this << (double)f; +} + +/*! + \overload + + Writes a \c double \a f to the stream and returns a reference to + the stream. +*/ + +TQTextStream &TQTextStream::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++ = '%'; // "%.<prec>l<f_char>" + *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'; + TQString 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 + + 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 TQTextStream. +*/ + +TQTextStream &TQTextStream::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 + + 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 TQTextStream. +*/ + +TQTextStream &TQTextStream::operator<<( const TQCString & s ) +{ + return operator<<(s.data()); +} + +/*! + \overload + + Writes \a s to the stream and returns a reference to the stream. +*/ + +TQTextStream &TQTextStream::operator<<( const TQString& s ) +{ + if ( !mapper && latin1 ) + return operator<<(s.latin1()); + CHECK_STREAM_PRECOND + TQString s1 = s; + if ( fwidth ) { // field width set + if ( !(flags() & left) ) { + s1 = s.rightJustify(fwidth, (char)fillchar); + } else { + s1 = s.leftJustify(fwidth, (char)fillchar); + } + fwidth = 0; // reset width + } + writeBlock( s1.unicode(), s1.length() ); + return *this; +} + + +/*! + \overload + + Writes a pointer to the stream and returns a reference to the + stream. + + The \a ptr is output as an unsigned long hexadecimal integer. +*/ + +TQTextStream &TQTextStream::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 TQTextStream::flags() const + + 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 TQTextStream::flags( int f ) + + \overload + + Sets the stream flags to \a f. Returns the previous stream flags. + + \sa setf(), unsetf(), flags() +*/ + +/*! + \fn int TQTextStream::setf( int bits ) + + Sets the stream flag bits \a bits. Returns the previous stream + flags. + + Equivalent to \c{flags( flags() | bits )}. + + \sa setf(), unsetf() +*/ + +/*! + \fn int TQTextStream::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 TQTextStream::unsetf( int bits ) + + Clears the stream flag bits \a bits. Returns the previous stream + flags. + + Equivalent to \c{flags( flags() & ~mask )}. + + \sa setf() +*/ + +/*! + \fn int TQTextStream::width() const + + Returns the field width. The default value is 0. +*/ + +/*! + \fn int TQTextStream::width( int w ) + + \overload + + Sets the field width to \a w. Returns the previous field width. +*/ + +/*! + \fn int TQTextStream::fill() const + + Returns the fill character. The default value is ' ' (space). +*/ + +/*! + \overload int TQTextStream::fill( int f ) + + Sets the fill character to \a f. Returns the previous fill character. +*/ + +/*! + \fn int TQTextStream::precision() const + + Returns the precision. The default value is 6. +*/ + +/*! + \fn int TQTextStream::precision( int p ) + + \overload + + Sets the precision to \a p. Returns the previous precision setting. +*/ + + + /***************************************************************************** + TQTextStream manipulators + *****************************************************************************/ + +TQTextStream &bin( TQTextStream &s ) +{ + s.setf(TQTS::bin,TQTS::basefield); + return s; +} + +TQTextStream &oct( TQTextStream &s ) +{ + s.setf(TQTS::oct,TQTS::basefield); + return s; +} + +TQTextStream &dec( TQTextStream &s ) +{ + s.setf(TQTS::dec,TQTS::basefield); + return s; +} + +TQTextStream &hex( TQTextStream &s ) +{ + s.setf(TQTS::hex,TQTS::basefield); + return s; +} + +TQTextStream &endl( TQTextStream &s ) +{ + return s << '\n'; +} + +TQTextStream &flush( TQTextStream &s ) +{ + if ( s.device() ) + s.device()->flush(); + return s; +} + +TQTextStream &ws( TQTextStream &s ) +{ + s.skipWhiteSpace(); + return s; +} + +TQTextStream &reset( TQTextStream &s ) +{ + s.reset(); + return s; +} + + +/*! + \class TQTextIStream qtextstream.h + \reentrant + \brief The TQTextIStream class is a convenience class for input streams. + + \ingroup io + \ingroup text + + This class provides a shorthand for creating simple input + \l{TQTextStream}s without having to pass a \e mode argument to the + constructor. + + This class makes it easy, for example, to write things like this: + \code + TQString data = "123 456"; + int a, b; + TQTextIStream(&data) >> a >> b; + \endcode + + \sa TQTextOStream +*/ + +/*! + \fn TQTextIStream::TQTextIStream( const TQString *s ) + + Constructs a stream to read from the string \a s. +*/ +/*! + \fn TQTextIStream::TQTextIStream( TQByteArray ba ) + + Constructs a stream to read from the array \a ba. +*/ +/*! + \fn TQTextIStream::TQTextIStream( FILE *f ) + + Constructs a stream to read from the file \a f. +*/ + + +/*! + \class TQTextOStream + \reentrant + \brief The TQTextOStream class is a convenience class for output streams. + + \ingroup io + \ingroup text + + This class provides a shorthand for creating simple output + \l{TQTextStream}s without having to pass a \e mode argument to the + constructor. + + This makes it easy for example, to write things like this: + \code + TQString result; + TQTextOStream(&result) << "pi = " << 3.14; + \endcode +*/ + +/*! + \fn TQTextOStream::TQTextOStream( TQString *s ) + + Constructs a stream to write to string \a s. +*/ +/*! + \fn TQTextOStream::TQTextOStream( TQByteArray ba ) + + Constructs a stream to write to the array \a ba. +*/ +/*! + \fn TQTextOStream::TQTextOStream( FILE *f ) + + Constructs a stream to write to the file \a f. +*/ + + + +/*! + 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 TQString). + \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 TQTextStream::setEncoding( Encoding e ) +{ + if ( d->sourceType == TQTextStreamPrivate::String ) + return; + + switch ( e ) { + case Unicode: + mapper = 0; + latin1 = FALSE; + doUnicodeHeader = TRUE; + internalOrder = TRUE; + networkOrder = TQChar::networkOrdered(); + break; + case UnicodeUTF8: +#ifndef QT_NO_TEXTCODEC + mapper = TQTextCodec::codecForMib( 106 ); + latin1 = FALSE; + doUnicodeHeader = TRUE; + internalOrder = TRUE; + networkOrder = TQChar::networkOrdered(); +#else + mapper = 0; + latin1 = TRUE; + doUnicodeHeader = TRUE; +#endif + break; + case UnicodeNetworkOrder: + mapper = 0; + latin1 = FALSE; + doUnicodeHeader = TRUE; + internalOrder = TQChar::networkOrdered(); + networkOrder = TRUE; + break; + case UnicodeReverse: + mapper = 0; + latin1 = FALSE; + doUnicodeHeader = TRUE; + internalOrder = !TQChar::networkOrdered(); + networkOrder = FALSE; + break; + case RawUnicode: + mapper = 0; + latin1 = FALSE; + doUnicodeHeader = FALSE; + internalOrder = TRUE; + networkOrder = TQChar::networkOrdered(); + break; + case Locale: + latin1 = TRUE; // fallback to Latin-1 +#ifndef QT_NO_TEXTCODEC + mapper = TQTextCodec::codecForLocale(); + // 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 +/*! + 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 TQTextStream::setCodec( TQTextCodec *codec ) +{ + if ( d->sourceType == TQTextStreamPrivate::String ) + return; // TQString 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. + + If Unicode is automatically detected in input, a codec with \link + TQTextCodec::name() name() \endlink "ISO-10646-UCS-2" is returned. + + \sa setCodec() +*/ + +TQTextCodec *TQTextStream::codec() +{ + if ( mapper ) { + return mapper; + } else { + // 4 is "ISO 8859-1", 1000 is "ISO-10646-UCS-2" + return TQTextCodec::codecForMib( latin1 ? 4 : 1000 ); + } +} + +#endif + +#endif // QT_NO_TEXTSTREAM |