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<a href="#pub-methods">Public Member Functions</a> |
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<h1>Gnome::Gda::BlobOp Class Reference<div class="ingroups"><a class="el" href="group__DataHandlers.html">Data Handlers</a></div></h1> </div>
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<!-- doxytag: class="Gnome::Gda::BlobOp" --><!-- doxytag: inherits="Glib::Object" -->
<p>Blobs handling. <a href="#_details">More...</a></p>
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Inheritance diagram for Gnome::Gda::BlobOp:</div>
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<div class="center"><img src="classGnome_1_1Gda_1_1BlobOp__inherit__graph.png" border="0" usemap="#Gnome_1_1Gda_1_1BlobOp_inherit__map" alt="Inheritance graph"/></div>
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Collaboration diagram for Gnome::Gda::BlobOp:</div>
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<map name="Gnome_1_1Gda_1_1BlobOp_coll__map" id="Gnome_1_1Gda_1_1BlobOp_coll__map">
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<p><a href="classGnome_1_1Gda_1_1BlobOp-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classGnome_1_1Gda_1_1BlobOp.html#a473f158cf2d0ed47fdf6524e576035e2">~BlobOp</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">GdaBlobOp* </td><td class="memItemRight" valign="bottom"><a class="el" href="classGnome_1_1Gda_1_1BlobOp.html#ac487793d28664a80cc9d4cf7e117cc7c">gobj</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Provides access to the underlying C GObject. <a href="#ac487793d28664a80cc9d4cf7e117cc7c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const GdaBlobOp* </td><td class="memItemRight" valign="bottom"><a class="el" href="classGnome_1_1Gda_1_1BlobOp.html#aa31d5c63e437c4596c82d1843b005da1">gobj</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Provides access to the underlying C GObject. <a href="#aa31d5c63e437c4596c82d1843b005da1"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">GdaBlobOp* </td><td class="memItemRight" valign="bottom"><a class="el" href="classGnome_1_1Gda_1_1BlobOp.html#a76500b21d0930d41264b8402ecaa2087">gobj_copy</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. <a href="#a76500b21d0930d41264b8402ecaa2087"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">long </td><td class="memItemRight" valign="bottom"><a class="el" href="classGnome_1_1Gda_1_1BlobOp.html#ac3456bc16d3b7945019b48529664b80c">get_length</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">long </td><td class="memItemRight" valign="bottom"><a class="el" href="classGnome_1_1Gda_1_1BlobOp.html#a0075b2014defe7434d7bae84c5166ce7">read</a> (<a class="el" href="classGnome_1_1Gda_1_1Blob.html">Blob</a>& blob, long offset, long <a class="elRef" href="http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a01568.html#ga445a43f417432dd1b9aed90ef239c700">size</a>)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Reads a chunk of bytes from the BLOB accessible through <em>op</em> into <em>blob</em>. <a href="#a0075b2014defe7434d7bae84c5166ce7"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">long </td><td class="memItemRight" valign="bottom"><a class="el" href="classGnome_1_1Gda_1_1BlobOp.html#ab398f8cd90d887d9d3c6394ec29aed04">write</a> (<a class="el" href="classGnome_1_1Gda_1_1Blob.html">Blob</a>& blob, long offset)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Writes a chunk of bytes from a <em>blob</em> to the BLOB accessible through <em>op</em>, <em>blob</em> is unchanged after this call. <a href="#ab398f8cd90d887d9d3c6394ec29aed04"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classGnome_1_1Gda_1_1BlobOp.html#a629bd67de63ee14defbc134d835ecbf6">read_all</a> (<a class="el" href="classGnome_1_1Gda_1_1Blob.html">Blob</a>& blob)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Reads the whole contents of the blob manipulated by <em>op</em> into <em>blob</em>. <a href="#a629bd67de63ee14defbc134d835ecbf6"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classGnome_1_1Gda_1_1BlobOp.html#aa24b7a9eea5c6d18cdebdd8ca47ddf00">write_all</a> (<a class="el" href="classGnome_1_1Gda_1_1Blob.html">Blob</a>& blob)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Writes the whole contents of <em>blob</em> into the blob manipulated by <em>op</em>. <a href="#aa24b7a9eea5c6d18cdebdd8ca47ddf00"></a><br/></td></tr>
<tr><td colspan="2"><h2><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static <a class="elRef" href="../../../glibmm-2.4/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a>< <a class="el" href="classGnome_1_1Gda_1_1BlobOp.html">BlobOp</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classGnome_1_1Gda_1_1BlobOp.html#a42da10e4e61a1f3d91d1549b5ba7754d">create</a> ()</td></tr>
<tr><td colspan="2"><h2><a name="pro-methods"></a>
Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classGnome_1_1Gda_1_1BlobOp.html#a9f67edc01953c2ca71cbd2054cb65e84">BlobOp</a> ()</td></tr>
<tr><td colspan="2"><h2><a name="related"></a>
Related Functions</h2></td></tr>
<tr><td colspan="2">(Note that these are not member functions.) <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="elRef" href="../../../glibmm-2.4/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a>< <a class="el" href="classGnome_1_1Gda_1_1BlobOp.html">Gnome::Gda::BlobOp</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classGnome_1_1Gda_1_1BlobOp.html#ae0d2305566efb6bf56f2d525104ffbb1">wrap</a> (GdaBlobOp* object, bool take_copy=false)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">A <a class="elRef" href="../../../glibmm-2.4/reference/html/namespaceGlib.html#a671306f4a3a0cae5ab4d7a9d54886592">Glib::wrap()</a> method for this object. <a href="#ae0d2305566efb6bf56f2d525104ffbb1"></a><br/></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>Blobs handling. </p>
<p>This object is a base class for individual database providers which support BLOB types. It supports operations to read and write data in a BLOB. </p>
</div><hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="a473f158cf2d0ed47fdf6524e576035e2"></a><!-- doxytag: member="Gnome::Gda::BlobOp::~BlobOp" ref="a473f158cf2d0ed47fdf6524e576035e2" args="()" -->
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<td class="memname">virtual Gnome::Gda::BlobOp::~BlobOp </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [virtual]</code></td>
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</div>
<div class="memdoc">
</div>
</div>
<a class="anchor" id="a9f67edc01953c2ca71cbd2054cb65e84"></a><!-- doxytag: member="Gnome::Gda::BlobOp::BlobOp" ref="a9f67edc01953c2ca71cbd2054cb65e84" args="()" -->
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<td class="memname">Gnome::Gda::BlobOp::BlobOp </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [protected]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
</div>
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<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a42da10e4e61a1f3d91d1549b5ba7754d"></a><!-- doxytag: member="Gnome::Gda::BlobOp::create" ref="a42da10e4e61a1f3d91d1549b5ba7754d" args="()" -->
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<td class="memname">static <a class="elRef" href="../../../glibmm-2.4/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGnome_1_1Gda_1_1BlobOp.html">BlobOp</a>> Gnome::Gda::BlobOp::create </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
</div>
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<a class="anchor" id="ac3456bc16d3b7945019b48529664b80c"></a><!-- doxytag: member="Gnome::Gda::BlobOp::get_length" ref="ac3456bc16d3b7945019b48529664b80c" args="() const " -->
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<td class="memname">long Gnome::Gda::BlobOp::get_length </td>
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<td class="paramname"></td><td>)</td>
<td> const</td>
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<dl class="return"><dt><b>Returns:</b></dt><dd>The length of the blob in bytes. In case of error, -1 is returned and the provider should have added an error (a <a class="el" href="classGnome_1_1Gda_1_1ConnectionEvent.html" title="Any event which has occurred on a Gda::Connection.">Gda::ConnectionEvent</a>) to the connection. </dd></dl>
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<a class="anchor" id="aa31d5c63e437c4596c82d1843b005da1"></a><!-- doxytag: member="Gnome::Gda::BlobOp::gobj" ref="aa31d5c63e437c4596c82d1843b005da1" args="() const " -->
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<td class="memname">const GdaBlobOp* Gnome::Gda::BlobOp::gobj </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const<code> [inline]</code></td>
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</table>
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<div class="memdoc">
<p>Provides access to the underlying C GObject. </p>
<p>Reimplemented from <a class="elRef" href="../../../glibmm-2.4/reference/html/classGlib_1_1ObjectBase.html#a778a94181132976bbfb0519793f3b32e">Glib::ObjectBase</a>.</p>
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<a class="anchor" id="ac487793d28664a80cc9d4cf7e117cc7c"></a><!-- doxytag: member="Gnome::Gda::BlobOp::gobj" ref="ac487793d28664a80cc9d4cf7e117cc7c" args="()" -->
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<td class="memname">GdaBlobOp* Gnome::Gda::BlobOp::gobj </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [inline]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Provides access to the underlying C GObject. </p>
<p>Reimplemented from <a class="elRef" href="../../../glibmm-2.4/reference/html/classGlib_1_1ObjectBase.html#a4c6efc18be8cb9c56e58fc0bd20fafbe">Glib::ObjectBase</a>.</p>
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</div>
<a class="anchor" id="a76500b21d0930d41264b8402ecaa2087"></a><!-- doxytag: member="Gnome::Gda::BlobOp::gobj_copy" ref="a76500b21d0930d41264b8402ecaa2087" args="()" -->
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<td class="memname">GdaBlobOp* Gnome::Gda::BlobOp::gobj_copy </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td></td>
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<div class="memdoc">
<p>Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. </p>
</div>
</div>
<a class="anchor" id="a0075b2014defe7434d7bae84c5166ce7"></a><!-- doxytag: member="Gnome::Gda::BlobOp::read" ref="a0075b2014defe7434d7bae84c5166ce7" args="(Blob &blob, long offset, long size)" -->
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<td class="memname">long Gnome::Gda::BlobOp::read </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classGnome_1_1Gda_1_1Blob.html">Blob</a>& </td>
<td class="paramname"><em>blob</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">long </td>
<td class="paramname"><em>offset</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">long </td>
<td class="paramname"><em>size</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Reads a chunk of bytes from the BLOB accessible through <em>op</em> into <em>blob</em>. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">blob</td><td>A <a class="el" href="classGnome_1_1Gda_1_1Blob.html" title="This object is a base class for individual database providers which support BLOB types.">Gda::Blob</a> to read data to. </td></tr>
<tr><td class="paramname">offset</td><td>Offset to read from the start of the blob (starts at 0). </td></tr>
<tr><td class="paramname">size</td><td>Maximum number of bytes to read. </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>The number of bytes actually read. In case of error, -1 is returned and the provider should have added an error to the connection. </dd></dl>
</div>
</div>
<a class="anchor" id="a629bd67de63ee14defbc134d835ecbf6"></a><!-- doxytag: member="Gnome::Gda::BlobOp::read_all" ref="a629bd67de63ee14defbc134d835ecbf6" args="(Blob &blob)" -->
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<td class="memname">bool Gnome::Gda::BlobOp::read_all </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classGnome_1_1Gda_1_1Blob.html">Blob</a>& </td>
<td class="paramname"><em>blob</em></td><td>)</td>
<td></td>
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<p>Reads the whole contents of the blob manipulated by <em>op</em> into <em>blob</em>. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">blob</td><td>A <a class="el" href="classGnome_1_1Gda_1_1Blob.html" title="This object is a base class for individual database providers which support BLOB types.">Gda::Blob</a> to read data to. </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd><code>true</code> if <em>blob->data</em> contains the whole BLOB manipulated by <em>op</em>. </dd></dl>
</div>
</div>
<a class="anchor" id="ab398f8cd90d887d9d3c6394ec29aed04"></a><!-- doxytag: member="Gnome::Gda::BlobOp::write" ref="ab398f8cd90d887d9d3c6394ec29aed04" args="(Blob &blob, long offset)" -->
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<td class="memname">long Gnome::Gda::BlobOp::write </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classGnome_1_1Gda_1_1Blob.html">Blob</a>& </td>
<td class="paramname"><em>blob</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">long </td>
<td class="paramname"><em>offset</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Writes a chunk of bytes from a <em>blob</em> to the BLOB accessible through <em>op</em>, <em>blob</em> is unchanged after this call. </p>
<p>If <em>blob</em> has an associated <a class="el" href="classGnome_1_1Gda_1_1BlobOp.html" title="Blobs handling.">Gda::BlobOp</a> (ie. if <em>blob->op</em> is not <code>0</code>) then the data to be written using <em>op</em> is the data fetched using <em>blob->op</em>. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">blob</td><td>A <a class="el" href="classGnome_1_1Gda_1_1Blob.html" title="This object is a base class for individual database providers which support BLOB types.">Gda::Blob</a> which contains the data to write. </td></tr>
<tr><td class="paramname">offset</td><td>Offset to write from the start of the blob (starts at 0). </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>The number of bytes written. In case of error, -1 is returned and the provider should have added an error to the connection. </dd></dl>
</div>
</div>
<a class="anchor" id="aa24b7a9eea5c6d18cdebdd8ca47ddf00"></a><!-- doxytag: member="Gnome::Gda::BlobOp::write_all" ref="aa24b7a9eea5c6d18cdebdd8ca47ddf00" args="(Blob &blob)" -->
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<td class="memname">bool Gnome::Gda::BlobOp::write_all </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classGnome_1_1Gda_1_1Blob.html">Blob</a>& </td>
<td class="paramname"><em>blob</em></td><td>)</td>
<td></td>
</tr>
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<p>Writes the whole contents of <em>blob</em> into the blob manipulated by <em>op</em>. </p>
<p>If necessary the resulting blob is truncated from its previous length. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">blob</td><td>A <a class="el" href="classGnome_1_1Gda_1_1Blob.html" title="This object is a base class for individual database providers which support BLOB types.">Gda::Blob</a> which contains the data to write. </td></tr>
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</dd>
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<dl class="return"><dt><b>Returns:</b></dt><dd><code>true</code> on success. </dd></dl>
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<hr/><h2>Friends And Related Function Documentation</h2>
<a class="anchor" id="ae0d2305566efb6bf56f2d525104ffbb1"></a><!-- doxytag: member="Gnome::Gda::BlobOp::wrap" ref="ae0d2305566efb6bf56f2d525104ffbb1" args="(GdaBlobOp *object, bool take_copy=false)" -->
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<div class="memproto">
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<td class="memname"><a class="elRef" href="../../../glibmm-2.4/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a>< <a class="el" href="classGnome_1_1Gda_1_1BlobOp.html">Gnome::Gda::BlobOp</a> > wrap </td>
<td>(</td>
<td class="paramtype">GdaBlobOp * </td>
<td class="paramname"><em>object</em>, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"><em>take_copy</em> = <code>false</code> </td>
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<td></td>
<td>)</td>
<td></td><td><code> [related]</code></td>
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<p>A <a class="elRef" href="../../../glibmm-2.4/reference/html/namespaceGlib.html#a671306f4a3a0cae5ab4d7a9d54886592">Glib::wrap()</a> method for this object. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">object</td><td>The C instance. </td></tr>
<tr><td class="paramname">take_copy</td><td>False if the result should take ownership of the C instance. True if it should take a new copy or ref. </td></tr>
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</dd>
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<dl class="return"><dt><b>Returns:</b></dt><dd>A C++ instance that wraps this C instance. </dd></dl>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li>libgdamm/blobop.h</li>
</ul>
</div>
<hr class="footer"/><address class="footer"><small>Generated on Thu Sep 22 2011 11:20:02 for libgdamm by 
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.3 </small></address>
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