1 files changed, 495 insertions, 0 deletions

diff --git a/qmake/tools/qbuffer.cpp b/qmake/tools/qbuffer.cpp
new file mode 100644
index 0000000..b213dd9
--- a/dev/null
+++ b/qmake/tools/qbuffer.cpp
@@ -0,0 +1,495 @@
+/****************************************************************************
+** $Id$
+**
+** Implementation of QBuffer class
+**
+** Created : 930812
+**
+** Copyright (C) 1992-2002 Trolltech AS.  All rights reserved.
+**
+** This file is part of the tools module of the Qt GUI Toolkit.
+**
+** This file may be distributed under the terms of the Q Public License
+** as defined by Trolltech AS of Norway and appearing in the file
+** LICENSE.QPL included in the packaging of this file.
+**
+** This file may be distributed and/or modified under the terms of the
+** GNU General Public License version 2 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.
+**
+** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
+** licenses may use this file in accordance with the Qt Commercial License
+** Agreement provided with the Software.
+**
+** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+**
+** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
+**   information about Qt Commercial License Agreements.
+** See http://www.trolltech.com/qpl/ for QPL licensing information.
+** See http://www.trolltech.com/gpl/ for GPL licensing information.
+**
+** Contact info@trolltech.com if any conditions of this licensing are
+** not clear to you.
+**
+**********************************************************************/
+
+#include "qbuffer.h"
+#include <stdlib.h>
+
+/*!
+    \class QBuffer qbuffer.h
+    \reentrant
+    \brief The QBuffer class is an I/O device that operates on a QByteArray.
+
+    \ingroup io
+    \ingroup collection
+
+    QBuffer is used to read and write to a memory buffer. It is
+    normally used with a QTextStream or a QDataStream. QBuffer has an
+    associated QByteArray which holds the buffer data. The size() of
+    the buffer is automatically adjusted as data is written.
+
+    The constructor \c QBuffer(QByteArray) creates a QBuffer using an
+    existing byte array. The byte array can also be set with
+    setBuffer(). Writing to the QBuffer will modify the original byte
+    array because QByteArray 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 QBuffer is through \l QDataStream or \l
+    QTextStream, which have constructors that take a QBuffer
+    parameter. For convenience, there are also QDataStream and
+    QTextStream constructors that take a QByteArray parameter. These
+    constructors create and open an internal QBuffer.
+
+    Note that QTextStream can also operate on a QString (a Unicode
+    string); a QBuffer cannot.
+
+    You can also use QBuffer directly through the standard QIODevice
+    functions readBlock(), writeBlock() readLine(), at(), getch(),
+    putch() and ungetch().
+
+    \sa QFile, QDataStream, QTextStream, QByteArray, \link shclass.html Shared Classes\endlink
+*/
+
+
+/*!
+    Constructs an empty buffer.
+*/
+
+QBuffer::QBuffer()
+{
+    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
+    QCString str = "abc";
+    QBuffer 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()
+*/
+
+QBuffer::QBuffer( QByteArray 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.
+*/
+
+QBuffer::~QBuffer()
+{
+}
+
+
+/*!
+    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 QByteArray is an explicitly shared class.
+
+    \sa buffer(), open(), close()
+*/
+
+bool QBuffer::setBuffer( QByteArray buf )
+{
+    if ( isOpen() ) {
+#if defined(QT_CHECK_STATE)
+        qWarning( "QBuffer::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 QByteArray QBuffer::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 QBuffer::open( int m  )
+{
+    if ( isOpen() ) {                           // buffer already open
+#if defined(QT_CHECK_STATE)
+        qWarning( "QBuffer::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 );
+    setStatus( 0 );
+    return TRUE;
+}
+
+/*!
+    \reimp
+
+    Closes an open buffer.
+
+    \sa open()
+*/
+
+void QBuffer::close()
+{
+    if ( isOpen() ) {
+        setFlags( IO_Direct );
+        ioIndex = 0;
+        a_inc = 16;
+    }
+}
+
+/*!
+    \reimp
+
+    The flush function does nothing for a QBuffer.
+*/
+
+void QBuffer::flush()
+{
+    return;
+}
+
+
+/*!
+    \fn QIODevice::Offset QBuffer::at() const
+
+    \reimp
+*/
+
+/*!
+    \fn QIODevice::Offset QBuffer::size() const
+
+    \reimp
+*/
+
+/*!
+  \reimp
+*/
+
+bool QBuffer::at( Offset pos )
+{
+#if defined(QT_CHECK_STATE)
+    if ( !isOpen() ) {
+        qWarning( "QBuffer::at: Buffer is not open" );
+        return FALSE;
+    }
+#endif
+    if ( pos > a_len ) {
+#if defined(QT_CHECK_RANGE)
+#if defined(QT_LARGEFILE_SUPPORT) && defined(QT_ABI_64BITOFFSET)
+        qWarning( "QBuffer::at: Index %llu out of range", pos );
+#else
+        qWarning( "QBuffer::at: Index %lu out of range", pos );
+#endif
+#endif
+        return FALSE;
+    }
+    ioIndex = pos;
+    return TRUE;
+}
+
+
+/*!
+  \reimp
+*/
+
+Q_LONG QBuffer::readBlock( char *p, Q_ULONG len )
+{
+#if defined(QT_CHECK_STATE)
+    if ( !p ) {
+        qWarning( "QBuffer::readBlock: Null pointer error" );
+        return -1;
+    }
+    if ( !isOpen() ) {                          // buffer not open
+        qWarning( "QBuffer::readBlock: Buffer not open" );
+        return -1;
+    }
+    if ( !isReadable() ) {                      // reading not permitted
+        qWarning( "QBuffer::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 Q_LONG QBuffer::writeBlock( const QByteArray& 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()
+*/
+
+Q_LONG QBuffer::writeBlock( const char *p, Q_ULONG len )
+{
+    if ( len == 0 )
+        return 0;
+
+#if defined(QT_CHECK_NULL)
+    if ( p == 0 ) {
+        qWarning( "QBuffer::writeBlock: Null pointer error" );
+        return -1;
+    }
+#endif
+#if defined(QT_CHECK_STATE)
+    if ( !isOpen() ) {                          // buffer not open
+        qWarning( "QBuffer::writeBlock: Buffer not open" );
+        return -1;
+    }
+    if ( !isWritable() ) {                      // writing not permitted
+        qWarning( "QBuffer::writeBlock: Write operation not permitted" );
+        return -1;
+    }
+#endif
+    if ( ioIndex + len >= a_len ) {             // overflow
+        Q_ULONG new_len = a_len + a_inc*((ioIndex+len-a_len)/a_inc+1);
+        if ( !a.resize( new_len ) ) {           // could not resize
+#if defined(QT_CHECK_NULL)
+            qWarning( "QBuffer::writeBlock: Memory allocation error" );
+#endif
+            setStatus( 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
+*/
+
+Q_LONG QBuffer::readLine( char *p, Q_ULONG maxlen )
+{
+#if defined(QT_CHECK_NULL)
+    if ( p == 0 ) {
+        qWarning( "QBuffer::readLine: Null pointer error" );
+        return -1;
+    }
+#endif
+#if defined(QT_CHECK_STATE)
+    if ( !isOpen() ) {                          // buffer not open
+        qWarning( "QBuffer::readLine: Buffer not open" );
+        return -1;
+    }
+    if ( !isReadable() ) {                      // reading not permitted
+        qWarning( "QBuffer::readLine: Read operation not permitted" );
+        return -1;
+    }
+#endif
+    if ( maxlen == 0 )
+        return 0;
+    Q_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 QBuffer::getch()
+{
+#if defined(QT_CHECK_STATE)
+    if ( !isOpen() ) {                          // buffer not open
+        qWarning( "QBuffer::getch: Buffer not open" );
+        return -1;
+    }
+    if ( !isReadable() ) {                      // reading not permitted
+        qWarning( "QBuffer::getch: Read operation not permitted" );
+        return -1;
+    }
+#endif
+    if ( ioIndex+1 > a.size() ) {               // overflow
+        setStatus( 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 QBuffer::putch( int ch )
+{
+#if defined(QT_CHECK_STATE)
+    if ( !isOpen() ) {                          // buffer not open
+        qWarning( "QBuffer::putch: Buffer not open" );
+        return -1;
+    }
+    if ( !isWritable() ) {                      // writing not permitted
+        qWarning( "QBuffer::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 QBuffer::ungetch( int ch )
+{
+#if defined(QT_CHECK_STATE)
+    if ( !isOpen() ) {                          // buffer not open
+        qWarning( "QBuffer::ungetch: Buffer not open" );
+        return -1;
+    }
+    if ( !isReadable() ) {                      // reading not permitted
+        qWarning( "QBuffer::ungetch: Read operation not permitted" );
+        return -1;
+    }
+#endif
+    if ( ch != -1 ) {
+        if ( ioIndex )
+            ioIndex--;
+        else
+            ch = -1;
+    }
+    return ch;
+}
+