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Diffstat (limited to 'tqtinterface/qt4/src/tools/tqbuffer.cpp')
| -rw-r--r-- | tqtinterface/qt4/src/tools/tqbuffer.cpp | 503 |
1 files changed, 0 insertions, 503 deletions
diff --git a/tqtinterface/qt4/src/tools/tqbuffer.cpp b/tqtinterface/qt4/src/tools/tqbuffer.cpp deleted file mode 100644 index 81ad242..0000000 --- a/tqtinterface/qt4/src/tools/tqbuffer.cpp +++ /dev/null @@ -1,503 +0,0 @@ -/**************************************************************************** -** -** Implementation of TQBuffer class -** -** Created : 930812 -** -** Copyright (C) 2010 Timothy Pearson and (C) 1992-2008 Trolltech ASA. -** -** 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 requirements will be met: -** http://trolltech.com/products/qt/licenses/licensing/opensource/. -** If you are unsure which license is appropriate for your use, please -** review the following information: -** http://trolltech.com/products/qt/licenses/licensing/licensingoverview -** or contact the sales department at sales@trolltech.com. -** -** This file may be used under the terms of the Q Public License as -** defined by Trolltech ASA and appearing in the file LICENSE.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 "tqbuffer.h" -#include <stdlib.h> - -#ifdef USE_QT4 - -#else // USE_QT4 - -/*! - \class TQBuffer tqbuffer.h - \reentrant - \brief The TQBuffer class is an I/O tqdevice that operates on a TQByteArray. - - \ingroup io - \ingroup collection - - TQBuffer is used to read and write to a memory buffer. It is - normally used with a TQTextStream or a TQDataStream. TQBuffer has an - associated TQByteArray which holds the buffer data. The size() of - the buffer is automatically adjusted as data is written. - - The constructor \c TQBuffer(TQByteArray) creates a TQBuffer using an - existing byte array. The byte array can also be set with - setBuffer(). Writing to the TQBuffer will modify the original byte - array because TQByteArray is \link shclass.html explicitly - shared.\endlink - - Use open() to open the buffer before use and to set the mode - (read-only, write-only, etc.). close() closes the buffer. The - buffer must be closed before reopening or calling setBuffer(). - - A common way to use TQBuffer is through \l TQDataStream or \l - TQTextStream, which have constructors that take a TQBuffer - parameter. For convenience, there are also TQDataStream and - TQTextStream constructors that take a TQByteArray parameter. These - constructors create and open an internal TQBuffer. - - Note that TQTextStream can also operate on a TQString (a Unicode - string); a TQBuffer cannot. - - You can also use TQBuffer directly through the standard TQIODevice - functions readBlock(), writeBlock() readLine(), at(), getch(), - putch() and ungetch(). - - \sa TQFile, TQDataStream, TQTextStream, TQByteArray, \link shclass.html Shared Classes\endlink -*/ - - -/*! - Constructs an empty buffer. -*/ - -TQBuffer::TQBuffer() -{ - setFlags( IO_Direct ); - a_inc = 16; // initial increment - a_len = 0; - ioIndex = 0; -} - - -/*! - Constructs a buffer that operates on \a buf. - - If you open the buffer in write mode (\c IO_WriteOnly or - \c IO_ReadWrite) and write something into the buffer, \a buf - will be modified. - - Example: - \code - TQCString str = "abc"; - TQBuffer b( str ); - b.open( IO_WriteOnly ); - b.at( 3 ); // position at the 4th character (the terminating \0) - b.writeBlock( "def", 4 ); // write "def" including the terminating \0 - b.close(); - // Now, str == "abcdef" with a terminating \0 - \endcode - - \sa setBuffer() -*/ - -TQBuffer::TQBuffer( TQByteArray buf ) : a(buf) -{ - setFlags( IO_Direct ); - a_len = a.size(); - a_inc = (a_len > 512) ? 512 : a_len; // initial increment - if ( a_inc < 16 ) - a_inc = 16; - ioIndex = 0; -} - -/*! - Destroys the buffer. -*/ - -TQBuffer::~TQBuffer() -{ -} - - -/*! - Replaces the buffer's contents with \a buf and returns TRUE. - - Does nothing (and returns FALSE) if isOpen() is TRUE. - - Note that if you open the buffer in write mode (\c IO_WriteOnly or - IO_ReadWrite) and write something into the buffer, \a buf is also - modified because TQByteArray is an explicitly shared class. - - \sa buffer(), open(), close() -*/ - -bool TQBuffer::setBuffer( TQByteArray buf ) -{ - if ( isOpen() ) { -#if defined(TQT_CHECK_STATE) - qWarning( "TQBuffer::setBuffer: Buffer is open" ); -#endif - return FALSE; - } - a = buf; - a_len = a.size(); - a_inc = (a_len > 512) ? 512 : a_len; // initial increment - if ( a_inc < 16 ) - a_inc = 16; - ioIndex = 0; - return TRUE; -} - -/*! - \fn TQByteArray TQBuffer::buffer() const - - Returns this buffer's byte array. - - \sa setBuffer() -*/ - -/*! - \reimp - - Opens the buffer in mode \a m. Returns TRUE if successful; - otherwise returns FALSE. The buffer must be opened before use. - - The mode parameter \a m must be a combination of the following flags. - \list - \i \c IO_ReadOnly opens the buffer in read-only mode. - \i \c IO_WriteOnly opens the buffer in write-only mode. - \i \c IO_ReadWrite opens the buffer in read/write mode. - \i \c IO_Append sets the buffer index to the end of the buffer. - \i \c IO_Truncate truncates the buffer. - \endlist - - \sa close(), isOpen() -*/ - -bool TQBuffer::open( int m ) -{ - if ( isOpen() ) { // buffer already open -#if defined(TQT_CHECK_STATE) - qWarning( "TQBuffer::open: Buffer already open" ); -#endif - return FALSE; - } - setMode( m ); - if ( m & IO_Truncate ) { // truncate buffer - a.resize( 0 ); - a_len = 0; - } - if ( m & IO_Append ) { // append to end of buffer - ioIndex = a.size(); - } else { - ioIndex = 0; - } - a_inc = 16; - setState( IO_Open ); - resetqStatus(); - return TRUE; -} - -/*! - \reimp - - Closes an open buffer. - - \sa open() -*/ - -void TQBuffer::close() -{ - if ( isOpen() ) { - setFlags( IO_Direct ); - ioIndex = 0; - a_inc = 16; - } -} - -/*! - \reimp - - The flush function does nothing for a TQBuffer. -*/ - -void TQBuffer::flush() -{ - return; -} - - -/*! - \fn TQIODevice::Offset TQBuffer::at() const - - \reimp -*/ - -/*! - \fn TQIODevice::Offset TQBuffer::size() const - - \reimp -*/ - -/*! - \reimp -*/ - -bool TQBuffer::at( Offset pos ) -{ -#if defined(TQT_CHECK_STATE) - if ( !isOpen() ) { - qWarning( "TQBuffer::at: Buffer is not open" ); - return FALSE; - } -#endif - if ( pos > a_len ) { -#if defined(TQT_CHECK_RANGE) -#if defined(TQT_ABI_QT4) - qWarning( "TQBuffer::at: Index %lld out of range", pos ); -#else - qWarning( "TQBuffer::at: Index %lu out of range", pos ); -#endif -#endif - return FALSE; - } - ioIndex = pos; - return TRUE; -} - - -/*! - \reimp -*/ - -TQ_LONG TQBuffer::readBlock( char *p, TQ_ULONG len ) -{ -#if defined(TQT_CHECK_STATE) - if ( !p ) { - qWarning( "TQBuffer::readBlock: Null pointer error" ); - return -1; - } - if ( !isOpen() ) { // buffer not open - qWarning( "TQBuffer::readBlock: Buffer not open" ); - return -1; - } - if ( !isReadable() ) { // reading not permitted - qWarning( "TQBuffer::readBlock: Read operation not permitted" ); - return -1; - } -#endif - if ( ioIndex + len > a.size() ) { // overflow - if ( ioIndex >= a.size() ) { - return 0; - } else { - len = a.size() - ioIndex; - } - } - memcpy(p, a.data() + ioIndex, len); - ioIndex += len; - return len; -} - -/*! - \overload TQ_LONG TQBuffer::writeBlock( const TQByteArray& data ) - - This convenience function is the same as calling - \c{writeBlock( data.data(), data.size() )} with \a data. -*/ - -/*! - Writes \a len bytes from \a p into the buffer at the current - index position, overwriting any characters there and extending the - buffer if necessary. Returns the number of bytes actually written. - - Returns -1 if an error occurred. - - \sa readBlock() -*/ - -TQ_LONG TQBuffer::writeBlock( const char *p, TQ_ULONG len ) -{ - if ( len == 0 ) - return 0; - -#if defined(TQT_CHECK_NULL) - if ( p == 0 ) { - qWarning( "TQBuffer::writeBlock: Null pointer error" ); - return -1; - } -#endif -#if defined(TQT_CHECK_STATE) - if ( !isOpen() ) { // buffer not open - qWarning( "TQBuffer::writeBlock: Buffer not open" ); - return -1; - } - if ( !isWritable() ) { // writing not permitted - qWarning( "TQBuffer::writeBlock: Write operation not permitted" ); - return -1; - } -#endif - if ( ioIndex + len > a_len ) { // overflow - TQ_ULONG new_len = a_len + a_inc*((ioIndex+len-a_len)/a_inc+1); - if ( !a.resize( new_len ) ) { // could not resize -#if defined(TQT_CHECK_NULL) - qWarning( "TQBuffer::writeBlock: Memory allocation error" ); -#endif - setqStatus( IO_ResourceError ); - return -1; - } - a_inc *= 2; // double increment - a_len = new_len; - a.shd->len = ioIndex + len; - } - memcpy( a.data()+ioIndex, p, len ); - ioIndex += len; - if ( a.shd->len < ioIndex ) - a.shd->len = ioIndex; // fake (not alloc'd) length - return len; -} - - -/*! - \reimp -*/ - -TQ_LONG TQBuffer::readLine( char *p, TQ_ULONG maxlen ) -{ -#if defined(TQT_CHECK_NULL) - if ( p == 0 ) { - qWarning( "TQBuffer::readLine: Null pointer error" ); - return -1; - } -#endif -#if defined(TQT_CHECK_STATE) - if ( !isOpen() ) { // buffer not open - qWarning( "TQBuffer::readLine: Buffer not open" ); - return -1; - } - if ( !isReadable() ) { // reading not permitted - qWarning( "TQBuffer::readLine: Read operation not permitted" ); - return -1; - } -#endif - if ( maxlen == 0 ) - return 0; - TQ_ULONG start = ioIndex; - char *d = a.data() + ioIndex; - maxlen--; // make room for 0-terminator - if ( a.size() - ioIndex < maxlen ) - maxlen = a.size() - ioIndex; - while ( maxlen-- ) { - if ( (*p++ = *d++) == '\n' ) - break; - } - *p = '\0'; - ioIndex = d - a.data(); - return ioIndex - start; -} - - -/*! - \reimp -*/ - -int TQBuffer::getch() -{ -#if defined(TQT_CHECK_STATE) - if ( !isOpen() ) { // buffer not open - qWarning( "TQBuffer::getch: Buffer not open" ); - return -1; - } - if ( !isReadable() ) { // reading not permitted - qWarning( "TQBuffer::getch: Read operation not permitted" ); - return -1; - } -#endif - if ( ioIndex+1 > a.size() ) { // overflow - setqStatus( IO_ReadError ); - return -1; - } - return uchar(*(a.data()+ioIndex++)); -} - -/*! - \reimp - - Writes the character \a ch into the buffer at the current index - position, overwriting any existing character and extending the - buffer if necessary. - - Returns \a ch, or -1 if an error occurred. - - \sa getch(), ungetch() -*/ - -int TQBuffer::putch( int ch ) -{ -#if defined(TQT_CHECK_STATE) - if ( !isOpen() ) { // buffer not open - qWarning( "TQBuffer::putch: Buffer not open" ); - return -1; - } - if ( !isWritable() ) { // writing not permitted - qWarning( "TQBuffer::putch: Write operation not permitted" ); - return -1; - } -#endif - if ( ioIndex + 1 > a_len ) { // overflow - char buf[1]; - buf[0] = (char)ch; - if ( writeBlock(buf,1) != 1 ) - return -1; // write error - } else { - *(a.data() + ioIndex++) = (char)ch; - if ( a.shd->len < ioIndex ) - a.shd->len = ioIndex; - } - return ch; -} - -/*! - \reimp -*/ - -int TQBuffer::ungetch( int ch ) -{ -#if defined(TQT_CHECK_STATE) - if ( !isOpen() ) { // buffer not open - qWarning( "TQBuffer::ungetch: Buffer not open" ); - return -1; - } - if ( !isReadable() ) { // reading not permitted - qWarning( "TQBuffer::ungetch: Read operation not permitted" ); - return -1; - } -#endif - if ( ch != -1 ) { - if ( ioIndex ) - ioIndex--; - else - ch = -1; - } - return ch; -} - -#endif // USE_QT4
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