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<h1>value.hpp File Reference</h1>Value interface and concrete subclasses.
<a href="#_details">More...</a>
<p>
<code>#include "<a class="el" href="types_8hpp.html">types.hpp</a>"</code><br>
<code>#include <string></code><br>
<code>#include <vector></code><br>
<code>#include <map></code><br>
<code>#include <iostream></code><br>
<code>#include <sstream></code><br>
<code>#include <memory></code><br>
<code>#include <cstring></code><br>
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Include dependency graph for value.hpp:</div>
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<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Classes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Value.html">Exiv2::Value</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Common interface for all types of values used with metadata. <a href="classExiv2_1_1Value.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1DataValue.html">Exiv2::DataValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Value for an undefined data type. <a href="classExiv2_1_1DataValue.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValueBase.html">Exiv2::StringValueBase</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Abstract base class for a string based Value type. <a href="classExiv2_1_1StringValueBase.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1StringValue.html">Exiv2::StringValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Value for string type. <a href="classExiv2_1_1StringValue.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1AsciiValue.html">Exiv2::AsciiValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Value for an Ascii string type. <a href="classExiv2_1_1AsciiValue.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1CommentValue.html">Exiv2::CommentValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Value for an Exif comment. <a href="classExiv2_1_1CommentValue.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="structExiv2_1_1CommentValue_1_1CharsetTable.html">Exiv2::CommentValue::CharsetTable</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Information pertaining to the defined character sets. <a href="structExiv2_1_1CommentValue_1_1CharsetTable.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1CommentValue_1_1CharsetInfo.html">Exiv2::CommentValue::CharsetInfo</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Charset information lookup functions. Implemented as a static class. <a href="classExiv2_1_1CommentValue_1_1CharsetInfo.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1XmpValue.html">Exiv2::XmpValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Base class for all <a class="el" href="namespaceExiv2.html" title="Provides classes and functions to encode and decode Exif and Iptc data. The libexiv2...">Exiv2</a> values used to store XMP property values. <a href="classExiv2_1_1XmpValue.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1XmpTextValue.html">Exiv2::XmpTextValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Value type suitable for simple XMP properties and XMP nodes of complex types which are not parsed into specific values. <a href="classExiv2_1_1XmpTextValue.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1XmpArrayValue.html">Exiv2::XmpArrayValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Value type for simple arrays. Each item in the array is a simple value, without qualifiers. The array may be an ordered (<em>seq</em>), unordered (<em>bag</em>) or alternative array (<em>alt</em>). The array items must not contain qualifiers. For language alternatives use <a class="el" href="classExiv2_1_1LangAltValue.html" title="Value type for XMP language alternative properties.">LangAltValue</a>. <a href="classExiv2_1_1XmpArrayValue.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1LangAltValue.html">Exiv2::LangAltValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Value type for XMP language alternative properties. <a href="classExiv2_1_1LangAltValue.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1DateValue.html">Exiv2::DateValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Value for simple ISO 8601 dates <a href="classExiv2_1_1DateValue.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="structExiv2_1_1DateValue_1_1Date.html">Exiv2::DateValue::Date</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Simple <a class="el" href="structExiv2_1_1DateValue_1_1Date.html" title="Simple Date helper structure.">Date</a> helper structure. <a href="structExiv2_1_1DateValue_1_1Date.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1TimeValue.html">Exiv2::TimeValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Value for simple ISO 8601 times. <a href="classExiv2_1_1TimeValue.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="structExiv2_1_1TimeValue_1_1Time.html">Exiv2::TimeValue::Time</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Simple <a class="el" href="structExiv2_1_1TimeValue_1_1Time.html" title="Simple Time helper structure.">Time</a> helper structure. <a href="structExiv2_1_1TimeValue_1_1Time.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1ValueType.html">Exiv2::ValueType< T ></a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Template for a Value of a basic type. This is used for unsigned and signed short, long and rationals. <a href="classExiv2_1_1ValueType.html#_details">More...</a><br></td></tr>
<tr><td colspan="2"><br><h2>Namespaces</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">namespace </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html">Exiv2</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Provides classes and functions to encode and decode Exif and Iptc data. The <b>libexiv2</b> API consists of the objects of this namespace. <br></td></tr>
<p>
<tr><td colspan="2"><br><h2>Typedefs</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="3f00bf58d6021c8c297f070d4a761651"></a><!-- doxytag: member="value.hpp::UShortValue" ref="3f00bf58d6021c8c297f070d4a761651" args="" -->
typedef ValueType< uint16_t > </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#3f00bf58d6021c8c297f070d4a761651">Exiv2::UShortValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Unsigned short value type. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="b25aa284d2da55e64eba4e8ed0692149"></a><!-- doxytag: member="value.hpp::ULongValue" ref="b25aa284d2da55e64eba4e8ed0692149" args="" -->
typedef ValueType< uint32_t > </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#b25aa284d2da55e64eba4e8ed0692149">Exiv2::ULongValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Unsigned long value type. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="16f4de646ee869927f6246645b142626"></a><!-- doxytag: member="value.hpp::URationalValue" ref="16f4de646ee869927f6246645b142626" args="" -->
typedef ValueType< URational > </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#16f4de646ee869927f6246645b142626">Exiv2::URationalValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Unsigned rational value type. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="67665147cbe2c7bd22af5aed7b7478ca"></a><!-- doxytag: member="value.hpp::ShortValue" ref="67665147cbe2c7bd22af5aed7b7478ca" args="" -->
typedef ValueType< int16_t > </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#67665147cbe2c7bd22af5aed7b7478ca">Exiv2::ShortValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Signed short value type. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="47f8d64316779977c1869da776c26b6e"></a><!-- doxytag: member="value.hpp::LongValue" ref="47f8d64316779977c1869da776c26b6e" args="" -->
typedef ValueType< int32_t > </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#47f8d64316779977c1869da776c26b6e">Exiv2::LongValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Signed long value type. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="b2a69ae1200f28233d89237bcefe952f"></a><!-- doxytag: member="value.hpp::RationalValue" ref="b2a69ae1200f28233d89237bcefe952f" args="" -->
typedef ValueType< Rational > </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#b2a69ae1200f28233d89237bcefe952f">Exiv2::RationalValue</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Signed rational value type. <br></td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="be882054db13fc2f4f6f7e8e1261d982"></a><!-- doxytag: member="value.hpp::operator<<" ref="be882054db13fc2f4f6f7e8e1261d982" args="(std::ostream &os, const Value &value)" -->
std::ostream & </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#be882054db13fc2f4f6f7e8e1261d982">Exiv2::operator<<</a> (std::ostream &os, const Value &value)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Output operator for <a class="el" href="classExiv2_1_1Value.html" title="Common interface for all types of values used with metadata.">Value</a> types. <br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="0c1039b2dcc4a13dd73b073b8870e1cc"></a><!-- doxytag: member="value.hpp::getType" ref="0c1039b2dcc4a13dd73b073b8870e1cc" args="()" -->
template<typename T > </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">TypeId </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#0c1039b2dcc4a13dd73b073b8870e1cc">Exiv2::getType</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Template to determine the TypeId for a type T. <br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="7adfad5af77bd5159197b1023a7c339b"></a><!-- doxytag: member="value.hpp::getType< uint16_t >" ref="7adfad5af77bd5159197b1023a7c339b" args="()" -->
template<> </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">TypeId </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#7adfad5af77bd5159197b1023a7c339b">Exiv2::getType< uint16_t ></a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization for an unsigned short. <br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="6fc05bba9d3e15439a68b4606e0b7734"></a><!-- doxytag: member="value.hpp::getType< uint32_t >" ref="6fc05bba9d3e15439a68b4606e0b7734" args="()" -->
template<> </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">TypeId </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#6fc05bba9d3e15439a68b4606e0b7734">Exiv2::getType< uint32_t ></a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization for an unsigned long. <br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="66cebda7b6b4876c32d580ba35ef8294"></a><!-- doxytag: member="value.hpp::getType< URational >" ref="66cebda7b6b4876c32d580ba35ef8294" args="()" -->
template<> </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">TypeId </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#66cebda7b6b4876c32d580ba35ef8294">Exiv2::getType< URational ></a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization for an unsigned rational. <br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="86127b5e02b3848bf87c35cee38c6615"></a><!-- doxytag: member="value.hpp::getType< int16_t >" ref="86127b5e02b3848bf87c35cee38c6615" args="()" -->
template<> </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">TypeId </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#86127b5e02b3848bf87c35cee38c6615">Exiv2::getType< int16_t ></a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization for a signed short. <br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="5353aa3b5e2449e040a6bd5b953d0975"></a><!-- doxytag: member="value.hpp::getType< int32_t >" ref="5353aa3b5e2449e040a6bd5b953d0975" args="()" -->
template<> </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">TypeId </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#5353aa3b5e2449e040a6bd5b953d0975">Exiv2::getType< int32_t ></a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization for a signed long. <br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="f35f1ff99ad498f4eefe425f48e35d41"></a><!-- doxytag: member="value.hpp::getType< Rational >" ref="f35f1ff99ad498f4eefe425f48e35d41" args="()" -->
template<> </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">TypeId </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#f35f1ff99ad498f4eefe425f48e35d41">Exiv2::getType< Rational ></a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization for a signed rational. <br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2">template<typename T > </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">T </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#574c8e7e118e2d5636d187172babd438">Exiv2::getValue</a> (const byte *buf, ByteOrder byteOrder)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Read a value of type T from the data buffer. <a href="#574c8e7e118e2d5636d187172babd438"></a><br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2">template<typename T > </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">long </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#355a8786cb561ae78b899fc548ed2cf2">Exiv2::toData</a> (byte *buf, T t, ByteOrder byteOrder)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert a value of type T to data, write the data to the data buffer. <a href="#355a8786cb561ae78b899fc548ed2cf2"></a><br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="12e304e7ef40c33ae5bbe9ff5e0b2ffb"></a><!-- doxytag: member="value.hpp::toData" ref="12e304e7ef40c33ae5bbe9ff5e0b2ffb" args="(byte *buf, uint16_t t, ByteOrder byteOrder)" -->
template<> </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">long </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#12e304e7ef40c33ae5bbe9ff5e0b2ffb">Exiv2::toData</a> (byte *buf, uint16_t t, ByteOrder byteOrder)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization to write an unsigned short to the data buffer. Return the number of bytes written. <br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="984d33ff6407b88656bebe7529f551f4"></a><!-- doxytag: member="value.hpp::toData" ref="984d33ff6407b88656bebe7529f551f4" args="(byte *buf, uint32_t t, ByteOrder byteOrder)" -->
template<> </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">long </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#984d33ff6407b88656bebe7529f551f4">Exiv2::toData</a> (byte *buf, uint32_t t, ByteOrder byteOrder)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization to write an unsigned long to the data buffer. Return the number of bytes written. <br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="3813b8b2cdea3616a9dc1bf033c4ad35"></a><!-- doxytag: member="value.hpp::toData" ref="3813b8b2cdea3616a9dc1bf033c4ad35" args="(byte *buf, URational t, ByteOrder byteOrder)" -->
template<> </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">long </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#3813b8b2cdea3616a9dc1bf033c4ad35">Exiv2::toData</a> (byte *buf, URational t, ByteOrder byteOrder)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization to write an unsigned rational to the data buffer. Return the number of bytes written. <br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="d4c31ff911e74ee1b649ca43432ac762"></a><!-- doxytag: member="value.hpp::toData" ref="d4c31ff911e74ee1b649ca43432ac762" args="(byte *buf, int16_t t, ByteOrder byteOrder)" -->
template<> </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">long </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#d4c31ff911e74ee1b649ca43432ac762">Exiv2::toData</a> (byte *buf, int16_t t, ByteOrder byteOrder)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization to write a signed short to the data buffer. Return the number of bytes written. <br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="f1dc94d2d78cdf6fc00c26daad801e94"></a><!-- doxytag: member="value.hpp::toData" ref="f1dc94d2d78cdf6fc00c26daad801e94" args="(byte *buf, int32_t t, ByteOrder byteOrder)" -->
template<> </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">long </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#f1dc94d2d78cdf6fc00c26daad801e94">Exiv2::toData</a> (byte *buf, int32_t t, ByteOrder byteOrder)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization to write a signed long to the data buffer. Return the number of bytes written. <br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="48e899f923b524295cab6b2f56a77b17"></a><!-- doxytag: member="value.hpp::toData" ref="48e899f923b524295cab6b2f56a77b17" args="(byte *buf, Rational t, ByteOrder byteOrder)" -->
template<> </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">long </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="namespaceExiv2.html#48e899f923b524295cab6b2f56a77b17">Exiv2::toData</a> (byte *buf, Rational t, ByteOrder byteOrder)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization to write a signed rational to the data buffer. Return the number of bytes written. <br></td></tr>
</table>
<hr><h2>Detailed Description</h2>
Value interface and concrete subclasses.
<p>
<dl class="version" compact><dt><b>Version:</b></dt><dd></dd></dl>
<dl class="rcs" compact><dt><b>Rev</b></dt><dd>1802 </dd></dl>
<dl class="author" compact><dt><b>Author:</b></dt><dd>Andreas Huggel (ahu) <a href="mailto:ahuggel@gmx.net">ahuggel@gmx.net</a> </dd></dl>
<dl class="date" compact><dt><b>Date:</b></dt><dd>09-Jan-04, ahu: created 11-Feb-04, ahu: isolated as a component 31-Jul-04, brad: added Time, Data and String values </dd></dl>
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