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<div class="navpath"><a class="el" href="namespaceExiv2.html">Exiv2</a>::<a class="el" href="classExiv2_1_1StringValueBase.html">StringValueBase</a>
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<h1>Exiv2::StringValueBase Class Reference</h1><!-- doxytag: class="Exiv2::StringValueBase" --><!-- doxytag: inherits="Exiv2::Value" -->Abstract base class for a string based Value type.
<a href="#_details">More...</a>
<p>
<code>#include <value.hpp></code>
<p>
<div class="dynheader">
Inheritance diagram for Exiv2::StringValueBase:</div>
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<p><center><img src="classExiv2_1_1StringValueBase__inherit__graph.png" border="0" usemap="#Exiv2_1_1StringValueBase__inherit__map" alt="Inheritance graph"></center>
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<area shape="rect" id="node5" href="classExiv2_1_1AsciiValue.html" title="Value for an Ascii string type." alt="" coords="5,155,197,181"><area shape="rect" id="node7" href="classExiv2_1_1CommentValue.html" title="Value for an Exif comment." alt="" coords="221,155,432,181"><area shape="rect" id="node9" href="classExiv2_1_1StringValue.html" title="Value for string type." alt="" coords="456,155,656,181"><area shape="rect" id="node2" href="classExiv2_1_1Value.html" title="Common interface for all types of values used with metadata." alt="" coords="256,5,397,32"></map>
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Collaboration diagram for Exiv2::StringValueBase:</div>
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<area shape="rect" id="node2" href="classExiv2_1_1Value.html" title="Common interface for all types of values used with metadata." alt="" coords="5,83,147,109"><area shape="rect" id="node4" title="STL class." alt="" coords="171,83,301,109"><area shape="rect" id="node6" title="STL class." alt="" coords="111,5,361,32"></map>
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<p>
<a href="classExiv2_1_1StringValueBase-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Types</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="690234b43e80adc70a6c7ee5106e5326"></a><!-- doxytag: member="Exiv2::StringValueBase::AutoPtr" ref="690234b43e80adc70a6c7ee5106e5326" args="" -->
typedef std::auto_ptr<br class="typebreak">
< <a class="el" href="classExiv2_1_1StringValueBase.html">StringValueBase</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#690234b43e80adc70a6c7ee5106e5326">AutoPtr</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Shortcut for a StringValueBase auto pointer. <br></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td colspan="2"><div class="groupHeader">Creators</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5787c8e04b3cec1870b3abd95d15ea6b"></a><!-- doxytag: member="Exiv2::StringValueBase::StringValueBase" ref="5787c8e04b3cec1870b3abd95d15ea6b" args="(TypeId typeId)" -->
</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#5787c8e04b3cec1870b3abd95d15ea6b">StringValueBase</a> (<a class="el" href="namespaceExiv2.html#5153319711f35fe81cbc13f4b852450c">TypeId</a> typeId)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Constructor for subclasses. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="837785dfc0f3561c939c2a9b4224ceb0"></a><!-- doxytag: member="Exiv2::StringValueBase::StringValueBase" ref="837785dfc0f3561c939c2a9b4224ceb0" args="(TypeId typeId, const std::string &buf)" -->
</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#837785dfc0f3561c939c2a9b4224ceb0">StringValueBase</a> (<a class="el" href="namespaceExiv2.html#5153319711f35fe81cbc13f4b852450c">TypeId</a> typeId, const std::string &buf)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Constructor for subclasses. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="dba0f1f9e5ca8e2873d0b2815786f99e"></a><!-- doxytag: member="Exiv2::StringValueBase::StringValueBase" ref="dba0f1f9e5ca8e2873d0b2815786f99e" args="(const StringValueBase &rhs)" -->
</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#dba0f1f9e5ca8e2873d0b2815786f99e">StringValueBase</a> (const <a class="el" href="classExiv2_1_1StringValueBase.html">StringValueBase</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Copy constructor. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="2ac242f851ece0249691464db664e4e8"></a><!-- doxytag: member="Exiv2::StringValueBase::~StringValueBase" ref="2ac242f851ece0249691464db664e4e8" args="()" -->
virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#2ac242f851ece0249691464db664e4e8">~StringValueBase</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Virtual destructor. <br></td></tr>
<tr><td colspan="2"><div class="groupHeader">Manipulators</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="6882ba90138a30fcf2123c74f928a75e"></a><!-- doxytag: member="Exiv2::StringValueBase::read" ref="6882ba90138a30fcf2123c74f928a75e" args="(const std::string &buf)" -->
virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#6882ba90138a30fcf2123c74f928a75e">read</a> (const std::string &buf)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Read the value from buf. This default implementation uses buf as it is. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#ae2b6c108c891670a4ee873946aedfea">read</a> (const <a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> *buf, long len, <a class="el" href="namespaceExiv2.html#94c225faf6d6c611a3828fae1c28efa6">ByteOrder</a> byteOrder=invalidByteOrder)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Read the value from a character buffer. <a href="#ae2b6c108c891670a4ee873946aedfea"></a><br></td></tr>
<tr><td colspan="2"><div class="groupHeader">Accessors</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a415b8fb5420125c8003870cb397f1b6"></a><!-- doxytag: member="Exiv2::StringValueBase::clone" ref="a415b8fb5420125c8003870cb397f1b6" args="() const " -->
<a class="el" href="classExiv2_1_1Value.html#0f62e585b82c97738858b743e60dff21">AutoPtr</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#a415b8fb5420125c8003870cb397f1b6">clone</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return an auto-pointer to a copy of itself (deep copy). The caller owns this copy and the auto-pointer ensures that it will be deleted. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual long </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#8fe749f4a9632ad30c72aac1b6fe5ec1">copy</a> (<a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> *buf, <a class="el" href="namespaceExiv2.html#94c225faf6d6c611a3828fae1c28efa6">ByteOrder</a> byteOrder=invalidByteOrder) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Write value to a character data buffer. <a href="#8fe749f4a9632ad30c72aac1b6fe5ec1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="cab779c35ec7636a52ce77ad52e95a42"></a><!-- doxytag: member="Exiv2::StringValueBase::count" ref="cab779c35ec7636a52ce77ad52e95a42" args="() const " -->
virtual long </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#cab779c35ec7636a52ce77ad52e95a42">count</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the number of components of the value. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="fda7ea759251027abc93e41b55781c34"></a><!-- doxytag: member="Exiv2::StringValueBase::size" ref="fda7ea759251027abc93e41b55781c34" args="() const " -->
virtual long </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#fda7ea759251027abc93e41b55781c34">size</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the size of the value in bytes. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual long </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#14727751ab89f415781402d9f3b087f1">toLong</a> (long n=0) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert the <em>n</em>-th component of the value to a long. The behaviour of this method may be undefined if there is no <em>n</em>-th component. <a href="#14727751ab89f415781402d9f3b087f1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual float </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#5ebf7bd7e0077ac4ee517f72145fe711">toFloat</a> (long n=0) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert the <em>n</em>-th component of the value to a float. The behaviour of this method may be undefined if there is no <em>n</em>-th component. <a href="#5ebf7bd7e0077ac4ee517f72145fe711"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="namespaceExiv2.html#95756f3f7fa19103f83addf5fa088a30">Rational</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#d7ffbf58cb0496d3ad4b13e46ee8a29e">toRational</a> (long n=0) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert the <em>n</em>-th component of the value to a Rational. The behaviour of this method may be undefined if there is no <em>n</em>-th component. <a href="#d7ffbf58cb0496d3ad4b13e46ee8a29e"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="885893dae46dac2f398786120d5d7291"></a><!-- doxytag: member="Exiv2::StringValueBase::write" ref="885893dae46dac2f398786120d5d7291" args="(std::ostream &os) const " -->
virtual std::ostream & </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#885893dae46dac2f398786120d5d7291">write</a> (std::ostream &os) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Write the value to an output stream. You do not usually have to use this function; it is used for the implementation of the output operator for Value, <a class="el" href="namespaceExiv2.html#be882054db13fc2f4f6f7e8e1261d982" title="Output operator for Value types.">operator<<(std::ostream &os, const Value &value)</a>. <br></td></tr>
<tr><td colspan="2"><br><h2>Public Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="64379351d8550e054f871067e4fecfb2"></a><!-- doxytag: member="Exiv2::StringValueBase::value_" ref="64379351d8550e054f871067e4fecfb2" args="" -->
std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#64379351d8550e054f871067e4fecfb2">value_</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Stores the string value. <br></td></tr>
<tr><td colspan="2"><br><h2>Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="281c13e6b4b440fa2eac1cc62cde3acd"></a><!-- doxytag: member="Exiv2::StringValueBase::operator=" ref="281c13e6b4b440fa2eac1cc62cde3acd" args="(const StringValueBase &rhs)" -->
<a class="el" href="classExiv2_1_1StringValueBase.html">StringValueBase</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#281c13e6b4b440fa2eac1cc62cde3acd">operator=</a> (const <a class="el" href="classExiv2_1_1StringValueBase.html">StringValueBase</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Assignment operator. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="bcaab81321b73e00ae6062e0dee93e81"></a><!-- doxytag: member="Exiv2::StringValueBase::clone_" ref="bcaab81321b73e00ae6062e0dee93e81" args="() const =0" -->
virtual <a class="el" href="classExiv2_1_1StringValueBase.html">StringValueBase</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html#bcaab81321b73e00ae6062e0dee93e81">clone_</a> () const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight"><a class="el" href="namespaceExiv2_1_1Internal.html" title="Contains internal objects which are not published and are not part of the libexiv2...">Internal</a> virtual copy constructor. <br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Abstract base class for a string based Value type.
<p>
Uses a std::string to store the value and implements defaults for most operations. <hr><h2>Member Function Documentation</h2>
<a class="anchor" name="8fe749f4a9632ad30c72aac1b6fe5ec1"></a><!-- doxytag: member="Exiv2::StringValueBase::copy" ref="8fe749f4a9632ad30c72aac1b6fe5ec1" args="(byte *buf, ByteOrder byteOrder=invalidByteOrder) const " -->
<div class="memitem">
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<td class="memname">virtual long Exiv2::StringValueBase::copy </td>
<td>(</td>
<td class="paramtype"><a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> * </td>
<td class="paramname"> <em>buf</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="namespaceExiv2.html#94c225faf6d6c611a3828fae1c28efa6">ByteOrder</a> </td>
<td class="paramname"> <em>byteOrder</em> = <code>invalidByteOrder</code></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td> const<code> [virtual]</code></td>
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<p>
Write value to a character data buffer.
<p>
The user must ensure that the buffer has enough memory. Otherwise the call results in undefined behaviour.<p>
<dl class="note" compact><dt><b>Note:</b></dt><dd>The byte order is required by the interface but not used by this method, so just use the default.</dd></dl>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>buf</em> </td><td>Data buffer to write to. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>byteOrder</em> </td><td>Byte order. Not used. </td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>Number of characters written. </dd></dl>
<p>Implements <a class="el" href="classExiv2_1_1Value.html#3bf4f9c2eda4f7850a390de98668ce15">Exiv2::Value</a>.</p>
</div>
</div><p>
<a class="anchor" name="ae2b6c108c891670a4ee873946aedfea"></a><!-- doxytag: member="Exiv2::StringValueBase::read" ref="ae2b6c108c891670a4ee873946aedfea" args="(const byte *buf, long len, ByteOrder byteOrder=invalidByteOrder)" -->
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<td class="memname">virtual int Exiv2::StringValueBase::read </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> * </td>
<td class="paramname"> <em>buf</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">long </td>
<td class="paramname"> <em>len</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="namespaceExiv2.html#94c225faf6d6c611a3828fae1c28efa6">ByteOrder</a> </td>
<td class="paramname"> <em>byteOrder</em> = <code>invalidByteOrder</code></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td><code> [virtual]</code></td>
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<div class="memdoc">
<p>
Read the value from a character buffer.
<p>
<dl class="note" compact><dt><b>Note:</b></dt><dd>The byte order is required by the interface but not used by this method, so just use the default.</dd></dl>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>buf</em> </td><td>Pointer to the data buffer to read from </td></tr>
<tr><td valign="top"></td><td valign="top"><em>len</em> </td><td>Number of bytes in the data buffer </td></tr>
<tr><td valign="top"></td><td valign="top"><em>byteOrder</em> </td><td>Byte order. Not needed.</td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 if successful. </dd></dl>
<p>Implements <a class="el" href="classExiv2_1_1Value.html#cc8870f802ebcdf9d4e081816ad8956e">Exiv2::Value</a>.</p>
</div>
</div><p>
<a class="anchor" name="5ebf7bd7e0077ac4ee517f72145fe711"></a><!-- doxytag: member="Exiv2::StringValueBase::toFloat" ref="5ebf7bd7e0077ac4ee517f72145fe711" args="(long n=0) const " -->
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<td class="memname">virtual float Exiv2::StringValueBase::toFloat </td>
<td>(</td>
<td class="paramtype">long </td>
<td class="paramname"> <em>n</em> = <code>0</code> </td>
<td> ) </td>
<td> const<code> [virtual]</code></td>
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<div class="memdoc">
<p>
Convert the <em>n</em>-th component of the value to a float. The behaviour of this method may be undefined if there is no <em>n</em>-th component.
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>The converted value. </dd></dl>
<p>Implements <a class="el" href="classExiv2_1_1Value.html#22d257caa6c1ffe6416ce02de7bd8c1c">Exiv2::Value</a>.</p>
</div>
</div><p>
<a class="anchor" name="14727751ab89f415781402d9f3b087f1"></a><!-- doxytag: member="Exiv2::StringValueBase::toLong" ref="14727751ab89f415781402d9f3b087f1" args="(long n=0) const " -->
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<td class="memname">virtual long Exiv2::StringValueBase::toLong </td>
<td>(</td>
<td class="paramtype">long </td>
<td class="paramname"> <em>n</em> = <code>0</code> </td>
<td> ) </td>
<td> const<code> [virtual]</code></td>
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<div class="memdoc">
<p>
Convert the <em>n</em>-th component of the value to a long. The behaviour of this method may be undefined if there is no <em>n</em>-th component.
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>The converted value. </dd></dl>
<p>Implements <a class="el" href="classExiv2_1_1Value.html#4530a3fc3e2305cf994de5476f46f953">Exiv2::Value</a>.</p>
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<a class="anchor" name="d7ffbf58cb0496d3ad4b13e46ee8a29e"></a><!-- doxytag: member="Exiv2::StringValueBase::toRational" ref="d7ffbf58cb0496d3ad4b13e46ee8a29e" args="(long n=0) const " -->
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<td class="memname">virtual <a class="el" href="namespaceExiv2.html#95756f3f7fa19103f83addf5fa088a30">Rational</a> Exiv2::StringValueBase::toRational </td>
<td>(</td>
<td class="paramtype">long </td>
<td class="paramname"> <em>n</em> = <code>0</code> </td>
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<td> const<code> [virtual]</code></td>
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Convert the <em>n</em>-th component of the value to a Rational. The behaviour of this method may be undefined if there is no <em>n</em>-th component.
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>The converted value. </dd></dl>
<p>Implements <a class="el" href="classExiv2_1_1Value.html#595a4cb549bec8c19d290ca3e95a2678">Exiv2::Value</a>.</p>
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<hr>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="value_8hpp.html">value.hpp</a></ul>
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<hr size="1"><address style="text-align: right;"><small>Generated on Thu Jun 25 15:18:09 2009 for Exiv2 by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.9 </small></address>
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