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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Qt Toolkit -  Format of the QDataStream operators</title><style type="text/css"><!--h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; }a:link { color: #004faf; text-decoration: none }a:visited { color: #672967; text-decoration: none }body { background: white; color: black; }--></style></head><body bgcolor="#ffffff"><p><table width="100%"><tr><td><a href="index.html"><img width="100" height="100" src="qtlogo.png"alt="Home" border="0"><img width="100"height="100" src="face.png" alt="Home" border="0"></a><td valign="top"><div align="right"><img src="dochead.png" width="472" height="27"><br><a href="classes.html"><b>Classes</b></a>- <a href="annotated.html">Annotated</a>- <a href="hierarchy.html">Tree</a>- <a href="functions.html">Functions</a>- <a href="index.html">Home</a>- <a href="topicals.html"><b>Structure</b>  <font face="Arial,Helvetica,Geneva,Swiss,SunSans-Regular" align="center" size=32>Qte</font></a></div></table><h1 align="center"> Format of the QDataStream operators</h1><br clear="all">The <a href="qdatastream.html">QDataStream</a> allows you to serialize some of the Qt data types. Inthe following table you find for these data types the format of theserialization.<p><table><p><tr bgcolor=#f0f0f0><td valign=top>Q_INT8</td><td valign=top>  <ul>  <li> signed byte  </ul></td></tr><p><tr bgcolor=#f0f0f0><td valign=top>Q_INT16</td><td valign=top>  <ul>  <li> signed 16 bit integer  </ul></td></tr><p><tr bgcolor=#f0f0f0><td valign=top>Q_INT32</td><td valign=top>  <ul>  <li> signed 32 bit integer  </ul></td></tr><p><tr bgcolor=#f0f0f0><td valign=top>Q_UINT8</td><td valign=top>  <ul>  <li> unsigned byte  </ul></td></tr><p><tr bgcolor=#f0f0f0><td valign=top>Q_UINT16</td><td valign=top>  <ul>  <li> unsigned 16 bit integer  </ul></td></tr><p><tr bgcolor=#f0f0f0><td valign=top>Q_UINT32</td><td valign=top>  <ul>  <li> unsigned 32 bit integer  </ul></td></tr><p><tr bgcolor=#f0f0f0><td valign=top>float</td><td valign=top>  <ul>  <li> 32-bit floating point number using the standard IEEE754 format  </ul></td></tr><p><tr bgcolor=#f0f0f0><td valign=top>double</td><td valign=top>  <ul>  <li> 64-bit floating point number using the standard IEEE754 format  </ul></td></tr><p><tr bgcolor=#f0f0f0><td valign=top>char*</td><td valign=top>  <ol>  <li> The length of the string including the terminating 0 (Q_UINT32)  <li> The string including the terminating 0, i.e. length bytes  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qbrush.html">QBrush</a></td><td valign=top>  <ol>  <li> The brush style (Q_UINT8)  <li> The brush color (QColor)  <li> If style == <code>CustomPattern:</code> the brush pixmap (QPixmap)  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qcolor.html">QColor</a></td><td valign=top>  <ul>  <li> RGB value serialized as a Q_UINT32  </ul></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qcursor.html">QCursor</a></td><td valign=top>  <ol>  <li> Shape id (Q_INT16)  <li> If shape == <code>BitmapCursor:</code> bitmap (QPixmap)  <li> If shape == <code>BitmapCursor:</code> mask (QPixmap)  <li> If shape == <code>BitmapCursor:</code> hot spot (QPoint)  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qfont.html">QFont</a></td><td valign=top>  <ol>  <li> The point size (Q_INT16)  <li> The style hint (Q_UINT8)  <li> The char set (Q_UINT8)  <li> The weight (Q_UINT8)  <li> The font bits (Q_UINT8)  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qimage.html">QImage</a></td><td valign=top>  <ul>  <li> Save it as a PNG image.  </ul></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qcolorgroup.html">QColorGroup</a></td><td valign=top>  <ol>  <li> foreground (QBrush)  <li> button (QBrush)  <li> light (QBrush)  <li> midLight (QBrush)  <li> dark (QBrush)  <li> mid (QBrush)  <li> text (QBrush)  <li> brightText (QBrush)  <li> ButtonText (QBrush)  <li> base (QBrush)  <li> background (QBrush)  <li> shadow (QBrush)  <li> highlight (QBrush)  <li> highlightedText (QBrush)  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qpalette.html">QPalette</a></td><td valign=top>  <ol>  <li> active (QColorGroup)  <li> disabled (QColorGroup)  <li> inactive (QColorGroup)  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qpen.html">QPen</a></td><td valign=top>  <ol>  <li> The pen style(s) (Q_UINT8)  <li> The pen width (Q_UINT8)  <li> The pen color (QColor)  </ol></td></tr><p><!--<a href="qpicture.html">QPicture</a></td><td valign=top><p>Not in 2.1! Should be documented in later releases!--><p><tr bgcolor=#f0f0f0><td valign=top><a href="qpixmap.html">QPixmap</a></td><td valign=top>  <ul>  <li> Save it as a PNG image.  </ul></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qpoint.html">QPoint</a></td><td valign=top>  <ol>  <li> The x coordinate (Q_INT32)  <li> The y coordinate (Q_INT32)  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qpointarray.html">QPointArray</a></td><td valign=top>  <ol>  <li> The array size (Q_UINT32)  <li> The array points (QPoint)  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qrect.html">QRect</a></td><td valign=top>  <ol>  <li> left (Q_INT32)  <li> top (Q_INT32)  <li> right (Q_INT32)  <li> bottom (Q_INT32)  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qregion.html">QRegion</a></td><td valign=top>  <ol>  <li> The size of the data, i.e. 8+16*(number of rectangles) (Q_UINT32)  <li> QRGN_RECTS (Q_INT32)  <li> The number of rectangles (Q_UINT32)  <li> The rectangles in sequential order (QRect)  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qsize.html">QSize</a></td><td valign=top>  <ol>  <li> width (Q_INT32)  <li> height (Q_INT32)  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qvariant.html">QVariant</a></td><td valign=top>  <ol>  <li> The type of the data (Q_UINT32)  <li> The data of the specified type  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qwmatrix.html">QWMatrix</a></td><td valign=top>  <ol>  <li> m11 (double)  <li> m12 (double)  <li> m21 (double)  <li> m22 (double)  <li> dx (double)  <li> dy (double)  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qbitarray.html">QBitArray</a></td><td valign=top>  <ol>  <li> The array size (Q_UINT32)  <li> The array bits, i.e. (size+7)/8 bytes  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qbytearray.html">QByteArray</a></td><td valign=top>  <ol>  <li> The array size (Q_UINT32)  <li> The array bytes, i.e. size bytes  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qcstring.html">QCString</a></td><td valign=top>  <ol>  <li> The length (Q_UINT32)  <li> The data, i.e. length bytes  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qdate.html">QDate</a></td><td valign=top>  <ul>  <li> Julian day (Q_UINT32)  </ul></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qtime.html">QTime</a></td><td valign=top>  <ul>  <li> Milliseconds since midnight (Q_UINT32)  </ul></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qdatetime.html">QDateTime</a></td><td valign=top>  <ol>  <li> Date (QDate)  <li> Time (QTime)  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qmap.html">QMap</a></td><td valign=top>  <ol>  <li> The number of items (Q_UINT32)  <li> For all items: the key and value  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qstring.html">QString</a></td><td valign=top>  <ol>  <li> If isNull():       <ol>       <li> 0xffffffff (Q_UINT32)       </ol>  <li> Else:       <ol>       <li> length (Q_UINT32)       <li> data in utf16       </ol>  </ol></td></tr><p><tr bgcolor=#f0f0f0><td valign=top><a href="qvaluelist.html">QValueList</a></td><td valign=top>  <ol>  <li> The number of list elements (Q_UINT32)  <li> All the elements in sequential order  </ol></td></tr><p></table><p><address><hr><div align="center"><table width="100%" cellspacing="0" border="0"><tr><td>Copyright
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