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Inheritance diagram for Exiv2::BasicIo:<p><center><img src="classExiv2_1_1BasicIo__inherit__graph.png" border="0" usemap="#Exiv2_1_1BasicIo__inherit__map" alt="Inheritance graph"></center>
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<map name="Exiv2_1_1BasicIo__inherit__map">
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<area href="classExiv2_1_1FileIo.html" shape="rect" coords="5,81,99,105" alt="">
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<area href="classExiv2_1_1MemIo.html" shape="rect" coords="123,81,227,105" alt="">
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<area href="classExiv2_1_1FileIo.html" shape="rect" coords="5,81,107,105" alt="">
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<area href="classExiv2_1_1MemIo.html" shape="rect" coords="131,81,243,105" alt="">
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<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center><a href="classExiv2_1_1BasicIo-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
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<tr><td colspan="2"><br><h2>Public Types</h2></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="f8f989522925b884d8c9d3a257265fa1"></a><!-- doxytag: member="Exiv2::BasicIo::AutoPtr" ref="f8f989522925b884d8c9d3a257265fa1" args="" -->
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typedef std::auto_ptr< <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#f8f989522925b884d8c9d3a257265fa1">AutoPtr</a></td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight"><a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> auto_ptr type. <br></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">enum </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#1d23c3bf7618f2ee6ebb5cf033b10911">Position</a> { <b>beg</b>,
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Seek starting positions. <br></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="f8f989522925b884d8c9d3a257265fa1"></a><!-- doxytag: member="Exiv2::BasicIo::AutoPtr" ref="f8f989522925b884d8c9d3a257265fa1" args="" -->
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typedef std::auto_ptr< <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#f8f989522925b884d8c9d3a257265fa1">AutoPtr</a></td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight"><a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> auto_ptr type. <br></td></tr>
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<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
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<tr><td colspan="2"><div class="groupHeader">Creators</div></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="0c6658dc8caea27ac88def52ce0789bd"></a><!-- doxytag: member="Exiv2::BasicIo::~BasicIo" ref="0c6658dc8caea27ac88def52ce0789bd" args="()" -->
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virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#0c6658dc8caea27ac88def52ce0789bd">~BasicIo</a> ()</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Destructor. <br></td></tr>
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<tr><td colspan="2"><div class="groupHeader">Manipulators</div></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#1beff0dcdf03510bad13b6946379c5f2">open</a> ()=0</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#561221bbe1d215b4d6b5ceceaa2e9a97">seek</a> (long offset, <a class="el" href="classExiv2_1_1BasicIo.html#1d23c3bf7618f2ee6ebb5cf033b10911">Position</a> pos)=0</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Move the current IO position. <a href="#561221bbe1d215b4d6b5ceceaa2e9a97"></a><br></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual const <a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#56dedc1898b73b376280fc9c9d656d9b">mmap</a> ()=0</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Direct access to the IO data. For files, this is done by mapping the file into the process's address space; for memory blocks, this allows direct access to the memory block. <a href="#56dedc1898b73b376280fc9c9d656d9b"></a><br></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="501ac3b9cdbcf80456d12b9db0e22c68"></a><!-- doxytag: member="Exiv2::BasicIo::munmap" ref="501ac3b9cdbcf80456d12b9db0e22c68" args="()=0" -->
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virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#501ac3b9cdbcf80456d12b9db0e22c68">munmap</a> ()=0</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Remove a mapping established with <a class="el" href="classExiv2_1_1BasicIo.html#56dedc1898b73b376280fc9c9d656d9b">mmap()</a>. <br></td></tr>
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<tr><td colspan="2"><div class="groupHeader">Accessors</div></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual long </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#eb9673a48a7af7376b7018998fb552e6">tell</a> () const =0</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the current IO position. <a href="#eb9673a48a7af7376b7018998fb552e6"></a><br></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual long </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#01903a1a2310197eb7e3fd41bedc3054">size</a> () const =0</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the current size of the IO source in bytes. <a href="#01903a1a2310197eb7e3fd41bedc3054"></a><br></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="17744832ee807c68f9c8d744692d9aaf"></a><!-- doxytag: member="Exiv2::BasicIo::isopen" ref="17744832ee807c68f9c8d744692d9aaf" args="() const =0" -->
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virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#17744832ee807c68f9c8d744692d9aaf">isopen</a> () const =0</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual long </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#7b30c5ec54f00bc2420f1e5482f4b5e2">tell</a> () const=0</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the current IO position. <a href="#7b30c5ec54f00bc2420f1e5482f4b5e2"></a><br></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual long </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#b30518eef26c1bbe29077ed804a39ee6">size</a> () const=0</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the current size of the IO source in bytes. <a href="#b30518eef26c1bbe29077ed804a39ee6"></a><br></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="0638dcede159cd8d7fa4fb1b05096e39"></a><!-- doxytag: member="Exiv2::BasicIo::isopen" ref="0638dcede159cd8d7fa4fb1b05096e39" args="() const=0" -->
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virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#0638dcede159cd8d7fa4fb1b05096e39">isopen</a> () const=0</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns true if the IO source is open, otherwise false. <br></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="d674727cddbf9cea627423620a8bb3d0"></a><!-- doxytag: member="Exiv2::BasicIo::error" ref="d674727cddbf9cea627423620a8bb3d0" args="() const =0" -->
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virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#d674727cddbf9cea627423620a8bb3d0">error</a> () const =0</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="65a4ac789d06fbe8b616bfb16bb66f23"></a><!-- doxytag: member="Exiv2::BasicIo::error" ref="65a4ac789d06fbe8b616bfb16bb66f23" args="() const=0" -->
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virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#65a4ac789d06fbe8b616bfb16bb66f23">error</a> () const=0</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns 0 if the IO source is in a valid state, otherwise nonzero. <br></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="29b826f89a8aac3c83ece6f8f343ed72"></a><!-- doxytag: member="Exiv2::BasicIo::eof" ref="29b826f89a8aac3c83ece6f8f343ed72" args="() const =0" -->
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virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#29b826f89a8aac3c83ece6f8f343ed72">eof</a> () const =0</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5cfc84e22e556407570d418fece23338"></a><!-- doxytag: member="Exiv2::BasicIo::eof" ref="5cfc84e22e556407570d418fece23338" args="() const=0" -->
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virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#5cfc84e22e556407570d418fece23338">eof</a> () const=0</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns true if the IO position has reach the end, otherwise false. <br></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="8c4af60d14039fd99d36c73ce8354c15"></a><!-- doxytag: member="Exiv2::BasicIo::path" ref="8c4af60d14039fd99d36c73ce8354c15" args="() const =0" -->
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virtual std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#8c4af60d14039fd99d36c73ce8354c15">path</a> () const =0</td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="3ddfacd50a552191c8d14c1bc88995c5"></a><!-- doxytag: member="Exiv2::BasicIo::path" ref="3ddfacd50a552191c8d14c1bc88995c5" args="() const=0" -->
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virtual std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#3ddfacd50a552191c8d14c1bc88995c5">path</a> () const=0</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the path to the IO resource. Often used to form comprehensive error messages where only a <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> instance is available. <br></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="classExiv2_1_1BasicIo.html#f8f989522925b884d8c9d3a257265fa1">BasicIo::AutoPtr</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#ec9dd2dd223ce57650462c74a0770502">temporary</a> () const =0</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns a temporary data storage location. This is often needed to rewrite an IO source. <a href="#ec9dd2dd223ce57650462c74a0770502"></a><br></td></tr>
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<tr><td colspan="2"><br><h2>Protected Member Functions</h2></td></tr>
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<tr><td colspan="2"><div class="groupHeader">Creators</div></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="c726bef377a5da282b0f2cadb5b779be"></a><!-- doxytag: member="Exiv2::BasicIo::BasicIo" ref="c726bef377a5da282b0f2cadb5b779be" args="()" -->
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</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#c726bef377a5da282b0f2cadb5b779be">BasicIo</a> ()</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Default Constructor. <br></td></tr>
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<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="classExiv2_1_1BasicIo.html#f8f989522925b884d8c9d3a257265fa1">BasicIo::AutoPtr</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1BasicIo.html#2c962d72689c040a04c18f9317b12497">temporary</a> () const=0</td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns a temporary data storage location. This is often needed to rewrite an IO source. <a href="#2c962d72689c040a04c18f9317b12497"></a><br></td></tr>
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<hr><a name="_details"></a><h2>Detailed Description</h2>
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An interface for simple binary IO.
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Designed to have semantics and names similar to those of C style FILE* operations. Subclasses should all behave the same so that they can be interchanged.
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<hr><h2>Member Function Documentation</h2>
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<a class="anchor" name="67ae3ca0f8aece92a7b7749dfb02edde"></a><!-- doxytag: member="Exiv2::BasicIo::close" ref="67ae3ca0f8aece92a7b7749dfb02edde" args="()=0" --><p>
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<table class="mdTable" cellpadding="2" cellspacing="0">
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<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top">virtual int Exiv2::BasicIo::close </td>
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<td class="md" valign="top">( </td>
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<td class="mdname1" valign="top" nowrap> </td>
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<td class="md" valign="top"> ) </td>
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<td class="md" nowrap><code> [pure virtual]</code></td>
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<table cellspacing="5" cellpadding="0" border="0">
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Close the IO source. After closing a <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> instance can not be read or written. Closing flushes any unwritten data. It is safe to call close on a closed instance.
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<dl compact><dt><b>Returns:</b></dt><dd>0 if successful;<br>
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Nonzero if failure. </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#e0a881364b273ff14fb90c9375e9378b">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#7c87d3a1b552a4a93fe38255b43d0fc5">Exiv2::MemIo</a>. </td>
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<a class="anchor" name="648bc0d9b1a79e34684375074d806534"></a><!-- doxytag: member="Exiv2::BasicIo::getb" ref="648bc0d9b1a79e34684375074d806534" args="()=0" --><p>
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<table class="mdTable" cellpadding="2" cellspacing="0">
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<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top">virtual int Exiv2::BasicIo::getb </td>
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<td class="md" valign="top">( </td>
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<td class="mdname1" valign="top" nowrap> </td>
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<td class="md" valign="top"> ) </td>
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<td class="md" nowrap><code> [pure virtual]</code></td>
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<table cellspacing="5" cellpadding="0" border="0">
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Read one byte from the IO source. Current IO position is advanced by one byte.
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<dl compact><dt><b>Returns:</b></dt><dd>The byte read from the IO source if successful;<br>
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EOF if failure; </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#7b211213f0c2e3b9153a69f67c15ab47">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#c3a53ab7bda3678eb813e505bad4e50a">Exiv2::MemIo</a>. </td>
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<a class="anchor" name="1beff0dcdf03510bad13b6946379c5f2"></a><!-- doxytag: member="Exiv2::BasicIo::open" ref="1beff0dcdf03510bad13b6946379c5f2" args="()=0" --><p>
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<table class="mdTable" cellpadding="2" cellspacing="0">
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<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top">virtual int Exiv2::BasicIo::open </td>
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<td class="md" valign="top">( </td>
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<td class="mdname1" valign="top" nowrap> </td>
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<td class="md" valign="top"> ) </td>
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<td class="md" nowrap><code> [pure virtual]</code></td>
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<table cellspacing="5" cellpadding="0" border="0">
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<a class="anchor" name="1beff0dcdf03510bad13b6946379c5f2"></a><!-- doxytag: member="Exiv2::BasicIo::open" ref="1beff0dcdf03510bad13b6946379c5f2" args="()=0" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">virtual int Exiv2::BasicIo::open </td>
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<td class="paramname"> </td>
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<td> ) </td>
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<td width="100%"><code> [pure virtual]</code></td>
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Open the IO source using the default access mode. The default mode should allow for reading and writing.
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This method can also be used to "reopen" an IO source which will flush any unwritten data and reset the IO position to the start. Subclasses may provide custom methods to allow for opening IO sources differently.<p>
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<dl compact><dt><b>Returns:</b></dt><dd>0 if successful;<br>
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Nonzero if failure. </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#82a0cd197da227242ad8fcc50a70d29b">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#32f5d13aff64550f03dbc93692d27d16">Exiv2::MemIo</a>. </td>
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<a class="anchor" name="d16a1fab0f122c8ca11b86d09b03b9a7"></a><!-- doxytag: member="Exiv2::BasicIo::putb" ref="d16a1fab0f122c8ca11b86d09b03b9a7" args="(byte data)=0" --><p>
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<table class="mdTable" cellpadding="2" cellspacing="0">
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<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top">virtual int Exiv2::BasicIo::putb </td>
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<td class="md" valign="top">( </td>
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<td class="md" nowrap valign="top"><a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> </td>
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<td class="mdname1" valign="top" nowrap> <em>data</em> </td>
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<td class="md" valign="top"> ) </td>
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<td class="md" nowrap><code> [pure virtual]</code></td>
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<table cellspacing="5" cellpadding="0" border="0">
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 if successful;<br>
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Nonzero if failure. </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#88b8ab582237647a4c28120c15030a71">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#cbc7726037d2eb0dbbdef649f30ebc5c">Exiv2::MemIo</a>.
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<a class="anchor" name="67ae3ca0f8aece92a7b7749dfb02edde"></a><!-- doxytag: member="Exiv2::BasicIo::close" ref="67ae3ca0f8aece92a7b7749dfb02edde" args="()=0" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">virtual int Exiv2::BasicIo::close </td>
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<td class="paramname"> </td>
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<td> ) </td>
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<td width="100%"><code> [pure virtual]</code></td>
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Close the IO source. After closing a <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> instance can not be read or written. Closing flushes any unwritten data. It is safe to call close on a closed instance.
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 if successful;<br>
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Nonzero if failure. </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#794be686e28524d9eed2a0811d477d3b">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#f2263c6d49984da7ce38daed9f327b1e">Exiv2::MemIo</a>.
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<a class="anchor" name="c548d52ef633ac425bd01d17ccd2e7e4"></a><!-- doxytag: member="Exiv2::BasicIo::write" ref="c548d52ef633ac425bd01d17ccd2e7e4" args="(const byte *data, long wcount)=0" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">virtual long Exiv2::BasicIo::write </td>
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<td class="paramtype">const <a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> * </td>
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<td class="paramname"> <em>data</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">long </td>
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<td class="paramname"> <em>wcount</em></td><td> </td>
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<td></td><td></td><td width="100%"><code> [pure virtual]</code></td>
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Write data to the IO source. Current IO position is advanced by the number of bytes written.
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<dl compact><dt><b>Parameters:</b></dt><dd>
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<table border="0" cellspacing="2" cellpadding="0">
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<tr><td valign="top"></td><td valign="top"><em>data</em> </td><td>Pointer to data. Data must be at least <em>wcount</em> bytes long </td></tr>
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<tr><td valign="top"></td><td valign="top"><em>wcount</em> </td><td>Number of bytes to be written. </td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>Number of bytes written to IO source successfully;<br>
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0 if failure; </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#1a576f408124d428d5c446a19e2a504d">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#79993ba49c24c36b30f444c218ce4579">Exiv2::MemIo</a>.
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<a class="anchor" name="31334606e230bbe94d6b8768d3c6d75f"></a><!-- doxytag: member="Exiv2::BasicIo::write" ref="31334606e230bbe94d6b8768d3c6d75f" args="(BasicIo &src)=0" -->
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<div class="memitem">
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<div class="memproto">
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<td class="memname">virtual long Exiv2::BasicIo::write </td>
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<td class="paramtype"><a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> & </td>
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<td class="paramname"> <em>src</em> </td>
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<td> ) </td>
232
<td width="100%"><code> [pure virtual]</code></td>
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Write data that is read from another <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> instance to the IO source. Current IO position is advanced by the number of bytes written.
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<dl compact><dt><b>Parameters:</b></dt><dd>
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<table border="0" cellspacing="2" cellpadding="0">
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<tr><td valign="top"></td><td valign="top"><em>src</em> </td><td>Reference to another <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> instance. Reading start at the source's current IO position </td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>Number of bytes written to IO source successfully;<br>
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0 if failure; </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#7fd4444f019a2cfbd0e925e9b181c95c">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#84c854a02e45febea5c0dfc0192e4b6e">Exiv2::MemIo</a>.
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<a class="anchor" name="d16a1fab0f122c8ca11b86d09b03b9a7"></a><!-- doxytag: member="Exiv2::BasicIo::putb" ref="d16a1fab0f122c8ca11b86d09b03b9a7" args="(byte data)=0" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">virtual int Exiv2::BasicIo::putb </td>
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<td class="paramtype"><a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> </td>
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<td class="paramname"> <em>data</em> </td>
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<td> ) </td>
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<td width="100%"><code> [pure virtual]</code></td>
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270
Write one byte to the IO source. Current IO position is advanced by one byte.
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<tr><td valign="top"></td><td valign="top"><em>data</em> </td><td>The single byte to be written. </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>The value of the byte written if successful;<br>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>The value of the byte written if successful;<br>
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EOF if failure; </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#5d982468386b392b34b5ee8142b73396">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#2737a46ff783d3e9c66c6f8ce255d913">Exiv2::MemIo</a>. </td>
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<a class="anchor" name="ec8cb20c86e72b87577370a28d66a0ca"></a><!-- doxytag: member="Exiv2::BasicIo::read" ref="ec8cb20c86e72b87577370a28d66a0ca" args="(byte *buf, long rcount)=0" --><p>
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<table class="mdTable" cellpadding="2" cellspacing="0">
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<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top">virtual long Exiv2::BasicIo::read </td>
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<td class="md" valign="top">( </td>
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<td class="md" nowrap valign="top"><a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> * </td>
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<td class="mdname" nowrap> <em>buf</em>, </td>
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<td class="md" nowrap align="right"></td>
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<td class="md" nowrap>long </td>
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<td class="mdname" nowrap> <em>rcount</em></td>
282
<td class="md">) </td>
283
<td class="md" colspan="2"><code> [pure virtual]</code></td>
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<table cellspacing="5" cellpadding="0" border="0">
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#581c10115b42fc3a6c2b177337988922">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#5999ba245f79d581c9c5a16982d736b6">Exiv2::MemIo</a>.
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<a class="anchor" name="8c9e6c7377b642afbb2c14a0e3896917"></a><!-- doxytag: member="Exiv2::BasicIo::read" ref="8c9e6c7377b642afbb2c14a0e3896917" args="(long rcount)=0" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">virtual <a class="el" href="classExiv2_1_1DataBuf.html">DataBuf</a> Exiv2::BasicIo::read </td>
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<td class="paramtype">long </td>
292
<td class="paramname"> <em>rcount</em> </td>
293
<td> ) </td>
294
<td width="100%"><code> [pure virtual]</code></td>
301
Read data from the IO source. Reading starts at the current IO position and the position is advanced by the number of bytes read.
303
<dl compact><dt><b>Parameters:</b></dt><dd>
304
<table border="0" cellspacing="2" cellpadding="0">
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<tr><td valign="top"></td><td valign="top"><em>rcount</em> </td><td>Maximum number of bytes to read. Fewer bytes may be read if <em>rcount</em> bytes are not available. </td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd><a class="el" href="classExiv2_1_1DataBuf.html">DataBuf</a> instance containing the bytes read. Use the <a class="el" href="classExiv2_1_1DataBuf.html#5e6028d5cdae2e149749667cf66c3e91">DataBuf::size_</a> member to find the number of bytes read. <a class="el" href="classExiv2_1_1DataBuf.html#5e6028d5cdae2e149749667cf66c3e91">DataBuf::size_</a> will be 0 on failure. </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#48ed0700ccfb60a6a435ab7086734965">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#3d45d5be7b0e25c32d37d5055da0adc0">Exiv2::MemIo</a>.
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<a class="anchor" name="ec8cb20c86e72b87577370a28d66a0ca"></a><!-- doxytag: member="Exiv2::BasicIo::read" ref="ec8cb20c86e72b87577370a28d66a0ca" args="(byte *buf, long rcount)=0" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">virtual long Exiv2::BasicIo::read </td>
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<td class="paramtype"><a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> * </td>
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<td class="paramname"> <em>buf</em>, </td>
325
<td class="paramkey"></td>
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<td class="paramtype">long </td>
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<td class="paramname"> <em>rcount</em></td><td> </td>
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<td></td><td></td><td width="100%"><code> [pure virtual]</code></td>
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340
Read data from the IO source. Reading starts at the current IO position and the position is advanced by the number of bytes read.
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<tr><td valign="top"></td><td valign="top"><em>rcount</em> </td><td>Maximum number of bytes to read. Fewer bytes may be read if <em>rcount</em> bytes are not available. </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>Number of bytes read from IO source successfully;<br>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>Number of bytes read from IO source successfully;<br>
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0 if failure; </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#23f598a52577e98be9f4292518ba6198">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#3c4d85990cf914c9c5475466ba522289">Exiv2::MemIo</a>. </td>
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<a class="anchor" name="8c9e6c7377b642afbb2c14a0e3896917"></a><!-- doxytag: member="Exiv2::BasicIo::read" ref="8c9e6c7377b642afbb2c14a0e3896917" args="(long rcount)=0" --><p>
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<table class="mdTable" cellpadding="2" cellspacing="0">
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<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top">virtual <a class="el" href="classExiv2_1_1DataBuf.html">DataBuf</a> Exiv2::BasicIo::read </td>
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<td class="md" valign="top">( </td>
320
<td class="md" nowrap valign="top">long </td>
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<td class="mdname1" valign="top" nowrap> <em>rcount</em> </td>
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<td class="md" valign="top"> ) </td>
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<td class="md" nowrap><code> [pure virtual]</code></td>
329
<table cellspacing="5" cellpadding="0" border="0">
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Read data from the IO source. Reading starts at the current IO position and the position is advanced by the number of bytes read.
352
Implemented in <a class="el" href="classExiv2_1_1FileIo.html#a54d2b91db8ac2073fbe438ef19ac055">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#7de679e4366d070dc6604db1d22275ce">Exiv2::MemIo</a>.
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<a class="anchor" name="648bc0d9b1a79e34684375074d806534"></a><!-- doxytag: member="Exiv2::BasicIo::getb" ref="648bc0d9b1a79e34684375074d806534" args="()=0" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">virtual int Exiv2::BasicIo::getb </td>
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<td class="paramname"> </td>
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<td> ) </td>
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<td width="100%"><code> [pure virtual]</code></td>
371
Read one byte from the IO source. Current IO position is advanced by one byte.
373
<dl class="return" compact><dt><b>Returns:</b></dt><dd>The byte read from the IO source if successful;<br>
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EOF if failure; </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#0741ebecd2ea70f86c40457c33cd6c66">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#b5d5467941f00e4bb47a411182955d44">Exiv2::MemIo</a>.
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<a class="anchor" name="cb964ff603c96da8711baddb66a385a4"></a><!-- doxytag: member="Exiv2::BasicIo::transfer" ref="cb964ff603c96da8711baddb66a385a4" args="(BasicIo &src)=0" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">virtual void Exiv2::BasicIo::transfer </td>
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<td class="paramtype"><a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> & </td>
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<td class="paramname"> <em>src</em> </td>
389
<td> ) </td>
390
<td width="100%"><code> [pure virtual]</code></td>
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Remove all data from this object's IO source and then transfer data from the <em>src</em> <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> object into this object.
399
The source object is invalidated by this operation and should not be used after this method returns. This method exists primarily to be used with the <a class="el" href="classExiv2_1_1BasicIo.html#2c962d72689c040a04c18f9317b12497">BasicIo::temporary()</a> method.<p>
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<dl compact><dt><b>Parameters:</b></dt><dd>
340
401
<table border="0" cellspacing="2" cellpadding="0">
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<tr><td valign="top"></td><td valign="top"><em>rcount</em> </td><td>Maximum number of bytes to read. Fewer bytes may be read if <em>rcount</em> bytes are not available. </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd><a class="el" href="classExiv2_1_1DataBuf.html">DataBuf</a> instance containing the bytes read. Use the <a class="el" href="classExiv2_1_1DataBuf.html#5e6028d5cdae2e149749667cf66c3e91">DataBuf::size_</a> member to find the number of bytes read. <a class="el" href="classExiv2_1_1DataBuf.html#5e6028d5cdae2e149749667cf66c3e91">DataBuf::size_</a> will be 0 on failure. </dd></dl>
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<tr><td valign="top"></td><td valign="top"><em>src</em> </td><td>Reference to another <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> instance. The entire contents of src are transferred to this object. The <em>src</em> object is invalidated by the method. </td></tr>
405
<dl compact><dt><b>Exceptions:</b></dt><dd>
406
<table border="0" cellspacing="2" cellpadding="0">
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<tr><td valign="top"></td><td valign="top"><em><a class="el" href="classExiv2_1_1Error.html">Error</a></em> </td><td>In case of failure </td></tr>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#5c7364fbbdc740ec0736da33ad9a82f0">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#b5b0239fe9df1d515e581d318ccceb7c">Exiv2::MemIo</a>. </td>
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<a class="anchor" name="561221bbe1d215b4d6b5ceceaa2e9a97"></a><!-- doxytag: member="Exiv2::BasicIo::seek" ref="561221bbe1d215b4d6b5ceceaa2e9a97" args="(long offset, Position pos)=0" --><p>
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<table class="mdTable" cellpadding="2" cellspacing="0">
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<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top">virtual int Exiv2::BasicIo::seek </td>
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<td class="md" valign="top">( </td>
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<td class="md" nowrap valign="top">long </td>
359
<td class="mdname" nowrap> <em>offset</em>, </td>
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<td class="md" nowrap align="right"></td>
364
<td class="md" nowrap><a class="el" href="classExiv2_1_1BasicIo.html#1d23c3bf7618f2ee6ebb5cf033b10911">Position</a> </td>
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<td class="mdname" nowrap> <em>pos</em></td>
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<td class="md">) </td>
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<td class="md" colspan="2"><code> [pure virtual]</code></td>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#a860f63e95d227be73b86b2fe64ad7b8">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#223908a596491d75cebbb7a6f9c1559f">Exiv2::MemIo</a>.
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<a class="anchor" name="561221bbe1d215b4d6b5ceceaa2e9a97"></a><!-- doxytag: member="Exiv2::BasicIo::seek" ref="561221bbe1d215b4d6b5ceceaa2e9a97" args="(long offset, Position pos)=0" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">virtual int Exiv2::BasicIo::seek </td>
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<td class="paramtype">long </td>
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<td class="paramname"> <em>offset</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="classExiv2_1_1BasicIo.html#1d23c3bf7618f2ee6ebb5cf033b10911">Position</a> </td>
429
<td class="paramname"> <em>pos</em></td><td> </td>
434
<td></td><td></td><td width="100%"><code> [pure virtual]</code></td>
376
<table cellspacing="5" cellpadding="0" border="0">
384
441
Move the current IO position.
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446
<tr><td valign="top"></td><td valign="top"><em>pos</em> </td><td>Position from which the seek should start </td></tr>
392
<dl compact><dt><b>Returns:</b></dt><dd>0 if successful;<br>
449
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 if successful;<br>
393
450
Nonzero if failure; </dd></dl>
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<a class="anchor" name="01903a1a2310197eb7e3fd41bedc3054"></a><!-- doxytag: member="Exiv2::BasicIo::size" ref="01903a1a2310197eb7e3fd41bedc3054" args="() const =0" --><p>
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<table class="mdTable" cellpadding="2" cellspacing="0">
401
<table cellpadding="0" cellspacing="0" border="0">
403
<td class="md" nowrap valign="top">virtual long Exiv2::BasicIo::size </td>
404
<td class="md" valign="top">( </td>
405
<td class="mdname1" valign="top" nowrap> </td>
406
<td class="md" valign="top"> ) </td>
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<td class="md" nowrap> const<code> [pure virtual]</code></td>
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<table cellspacing="5" cellpadding="0" border="0">
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#889840bb9764987ce7a13c10d3ddcf2e">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#b4a12d5b5ed6f8447c7167942c4aa4ae">Exiv2::MemIo</a>.
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<a class="anchor" name="56dedc1898b73b376280fc9c9d656d9b"></a><!-- doxytag: member="Exiv2::BasicIo::mmap" ref="56dedc1898b73b376280fc9c9d656d9b" args="()=0" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">virtual const <a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a>* Exiv2::BasicIo::mmap </td>
463
<td class="paramname"> </td>
464
<td> ) </td>
465
<td width="100%"><code> [pure virtual]</code></td>
472
Direct access to the IO data. For files, this is done by mapping the file into the process's address space; for memory blocks, this allows direct access to the memory block.
474
Todo: This is currently only for read access.
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#262356ec3c52ccdba2862b289f8e5e37">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#b3e20f77251ba80e65cd6e6ac93efd76">Exiv2::MemIo</a>.
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<a class="anchor" name="7b30c5ec54f00bc2420f1e5482f4b5e2"></a><!-- doxytag: member="Exiv2::BasicIo::tell" ref="7b30c5ec54f00bc2420f1e5482f4b5e2" args="() const=0" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">virtual long Exiv2::BasicIo::tell </td>
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<td class="paramname"> </td>
487
<td> ) </td>
488
<td width="100%"> const<code> [pure virtual]</code></td>
495
Get the current IO position.
497
<dl class="return" compact><dt><b>Returns:</b></dt><dd>Offset from the start of IO if successful;<br>
498
-1 if failure; </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#3eae8ca1955b5e9c9e70e116b5af98df">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#b3a522e04b23cc17c2aadf126d4d222b">Exiv2::MemIo</a>.
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<a class="anchor" name="b30518eef26c1bbe29077ed804a39ee6"></a><!-- doxytag: member="Exiv2::BasicIo::size" ref="b30518eef26c1bbe29077ed804a39ee6" args="() const=0" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">virtual long Exiv2::BasicIo::size </td>
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<td class="paramname"> </td>
512
<td> ) </td>
513
<td width="100%"> const<code> [pure virtual]</code></td>
421
520
Get the current size of the IO source in bytes.
423
<dl compact><dt><b>Returns:</b></dt><dd>Size of the IO source in bytes;<br>
424
-1 if failure; </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#661e30ac842bbbeedef11aa9e1454f6d">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#4cba82129b173367e5e987125d2a1635">Exiv2::MemIo</a>. </td>
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<a class="anchor" name="eb9673a48a7af7376b7018998fb552e6"></a><!-- doxytag: member="Exiv2::BasicIo::tell" ref="eb9673a48a7af7376b7018998fb552e6" args="() const =0" --><p>
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<table class="mdTable" cellpadding="2" cellspacing="0">
434
<table cellpadding="0" cellspacing="0" border="0">
436
<td class="md" nowrap valign="top">virtual long Exiv2::BasicIo::tell </td>
437
<td class="md" valign="top">( </td>
438
<td class="mdname1" valign="top" nowrap> </td>
439
<td class="md" valign="top"> ) </td>
440
<td class="md" nowrap> const<code> [pure virtual]</code></td>
446
<table cellspacing="5" cellpadding="0" border="0">
454
Get the current IO position.
456
<dl compact><dt><b>Returns:</b></dt><dd>Offset from the start of IO if successful;<br>
457
-1 if failure; </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#bf285ea310f0c53d3107de6ba6e518db">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#832a61a8b49b570024068efb54d08955">Exiv2::MemIo</a>. </td>
463
<a class="anchor" name="ec9dd2dd223ce57650462c74a0770502"></a><!-- doxytag: member="Exiv2::BasicIo::temporary" ref="ec9dd2dd223ce57650462c74a0770502" args="() const =0" --><p>
464
<table class="mdTable" cellpadding="2" cellspacing="0">
467
<table cellpadding="0" cellspacing="0" border="0">
469
<td class="md" nowrap valign="top">virtual <a class="el" href="classExiv2_1_1BasicIo.html#f8f989522925b884d8c9d3a257265fa1">BasicIo::AutoPtr</a> Exiv2::BasicIo::temporary </td>
470
<td class="md" valign="top">( </td>
471
<td class="mdname1" valign="top" nowrap> </td>
472
<td class="md" valign="top"> ) </td>
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<td class="md" nowrap> const<code> [pure virtual]</code></td>
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<table cellspacing="5" cellpadding="0" border="0">
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>Size of the IO source in bytes;<br>
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-1 if failure; </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#7f1b30a20c4478007079d4291872359b">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#b13e91650bd961bb7938290ffe100ec2">Exiv2::MemIo</a>.
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<a class="anchor" name="2c962d72689c040a04c18f9317b12497"></a><!-- doxytag: member="Exiv2::BasicIo::temporary" ref="2c962d72689c040a04c18f9317b12497" args="() const=0" -->
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">virtual <a class="el" href="classExiv2_1_1BasicIo.html#f8f989522925b884d8c9d3a257265fa1">BasicIo::AutoPtr</a> Exiv2::BasicIo::temporary </td>
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<td class="paramname"> </td>
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<td> ) </td>
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<td width="100%"> const<code> [pure virtual]</code></td>
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Returns a temporary data storage location. This is often needed to rewrite an IO source.
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For example, data may be read from the original IO source, modified in some way, and then saved to the temporary instance. After the operation is complete, the <a class="el" href="classExiv2_1_1BasicIo.html#cb964ff603c96da8711baddb66a385a4">BasicIo::transfer</a> method can be used to replace the original IO source with the modified version. Subclasses are free to return any class that derives from <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a>.<p>
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<dl compact><dt><b>Returns:</b></dt><dd>An instance of <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> on success </dd></dl>
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<dl compact><dt><b>Exceptions:</b></dt><dd>
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<table border="0" cellspacing="2" cellpadding="0">
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<tr><td valign="top"></td><td valign="top"><em><a class="el" href="classExiv2_1_1Error.html">Error</a></em> </td><td>In case of failure </td></tr>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#ffc1034970489c7734cfefed90b4d8d1">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#c3d6031a13b8a7eae6959178bb1301a0">Exiv2::MemIo</a>. </td>
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<a class="anchor" name="cb964ff603c96da8711baddb66a385a4"></a><!-- doxytag: member="Exiv2::BasicIo::transfer" ref="cb964ff603c96da8711baddb66a385a4" args="(BasicIo &src)=0" --><p>
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<table class="mdTable" cellpadding="2" cellspacing="0">
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<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top">virtual void Exiv2::BasicIo::transfer </td>
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<td class="md" valign="top">( </td>
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<td class="md" nowrap valign="top"><a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> & </td>
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<td class="mdname1" valign="top" nowrap> <em>src</em> </td>
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<td class="md" valign="top"> ) </td>
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<td class="md" nowrap><code> [pure virtual]</code></td>
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<table cellspacing="5" cellpadding="0" border="0">
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Remove all data from this object's IO source and then transfer data from the <em>src</em> <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> object into this object.
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The source object is invalidated by this operation and should not be used after this method returns. This method exists primarily to be used with the <a class="el" href="classExiv2_1_1BasicIo.html#ec9dd2dd223ce57650462c74a0770502">BasicIo::temporary()</a> method.<p>
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<dl compact><dt><b>Parameters:</b></dt><dd>
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<table border="0" cellspacing="2" cellpadding="0">
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<tr><td valign="top"></td><td valign="top"><em>src</em> </td><td>Reference to another <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> instance. The entire contents of src are transferred to this object. The <em>src</em> object is invalidated by the method. </td></tr>
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<dl compact><dt><b>Exceptions:</b></dt><dd>
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<table border="0" cellspacing="2" cellpadding="0">
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<tr><td valign="top"></td><td valign="top"><em><a class="el" href="classExiv2_1_1Error.html">Error</a></em> </td><td>In case of failure </td></tr>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#7820fe3bdac99ff4a78dccccba1eed10">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#c0c261a78dfeb097eacb51d14552389c">Exiv2::MemIo</a>. </td>
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<a class="anchor" name="31334606e230bbe94d6b8768d3c6d75f"></a><!-- doxytag: member="Exiv2::BasicIo::write" ref="31334606e230bbe94d6b8768d3c6d75f" args="(BasicIo &src)=0" --><p>
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<table class="mdTable" cellpadding="2" cellspacing="0">
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<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top">virtual long Exiv2::BasicIo::write </td>
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<td class="md" valign="top">( </td>
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<td class="md" nowrap valign="top"><a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> & </td>
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<td class="mdname1" valign="top" nowrap> <em>src</em> </td>
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<td class="md" valign="top"> ) </td>
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<td class="md" nowrap><code> [pure virtual]</code></td>
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<table cellspacing="5" cellpadding="0" border="0">
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Write data that is read from another <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> instance to the IO source. Current IO position is advanced by the number of bytes written.
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<dl compact><dt><b>Parameters:</b></dt><dd>
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<table border="0" cellspacing="2" cellpadding="0">
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<tr><td valign="top"></td><td valign="top"><em>src</em> </td><td>Reference to another <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> instance. Reading start at the source's current IO position </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>Number of bytes written to IO source successfully;<br>
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0 if failure; </dd></dl>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#d388515b87717088238dca8d71e75470">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#0d22943b9f0f0cc399bd7616dd7dd695">Exiv2::MemIo</a>. </td>
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<a class="anchor" name="c548d52ef633ac425bd01d17ccd2e7e4"></a><!-- doxytag: member="Exiv2::BasicIo::write" ref="c548d52ef633ac425bd01d17ccd2e7e4" args="(const byte *data, long wcount)=0" --><p>
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<table class="mdTable" cellpadding="2" cellspacing="0">
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<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top">virtual long Exiv2::BasicIo::write </td>
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<td class="md" valign="top">( </td>
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<td class="md" nowrap valign="top">const <a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> * </td>
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<td class="mdname" nowrap> <em>data</em>, </td>
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<td class="md" nowrap align="right"></td>
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<td class="md" nowrap>long </td>
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<td class="mdname" nowrap> <em>wcount</em></td>
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<td class="md">) </td>
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<td class="md" colspan="2"><code> [pure virtual]</code></td>
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<table cellspacing="5" cellpadding="0" border="0">
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Write data to the IO source. Current IO position is advanced by the number of bytes written.
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<dl compact><dt><b>Parameters:</b></dt><dd>
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<table border="0" cellspacing="2" cellpadding="0">
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<tr><td valign="top"></td><td valign="top"><em>data</em> </td><td>Pointer to data. Data must be at least <em>wcount</em> bytes long </td></tr>
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<tr><td valign="top"></td><td valign="top"><em>wcount</em> </td><td>Number of bytes to be written. </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>Number of bytes written to IO source successfully;<br>
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0 if failure; </dd></dl>
629
Implemented in <a class="el" href="classExiv2_1_1FileIo.html#5b3d5f5a5b4b7f9d3d8cec46a4ad95f7">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#b34c91ef04dd9b8f5faf51d380aa55b9">Exiv2::MemIo</a>. </td>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>An instance of <a class="el" href="classExiv2_1_1BasicIo.html">BasicIo</a> on success </dd></dl>
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<dl compact><dt><b>Exceptions:</b></dt><dd>
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<table border="0" cellspacing="2" cellpadding="0">
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<tr><td valign="top"></td><td valign="top"><em><a class="el" href="classExiv2_1_1Error.html">Error</a></em> </td><td>In case of failure </td></tr>
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Implemented in <a class="el" href="classExiv2_1_1FileIo.html#92ffc109765919436e59bf3031fb9483">Exiv2::FileIo</a>, and <a class="el" href="classExiv2_1_1MemIo.html#82a9fd278a45a7dd9f67a76d952ed1a8">Exiv2::MemIo</a>.
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<hr>The documentation for this class was generated from the following file:<ul>
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<li><a class="el" href="basicio_8hpp.html">basicio.hpp</a></ul>
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<hr size="1"><address style="align: right;"><small>Generated on Fri Jun 2 23:54:45 2006 for Exiv2 by
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<hr size="1"><address style="align: right;"><small>Generated on Mon Nov 27 20:16:24 2006 for Exiv2 by
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<a href="http://www.doxygen.org/index.html">
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<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.6 </small></address>
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<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.1 </small></address>
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