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<li class="navelem"><a class="el" href="namespaceripple.html">ripple</a></li><li class="navelem"><a class="el" href="namespaceripple_1_1NodeStore.html">NodeStore</a></li><li class="navelem"><a class="el" href="classripple_1_1NodeStore_1_1EncodedBlob.html">EncodedBlob</a></li> </ul>
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<a href="#pub-methods">Public Member Functions</a> &#124;
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<div class="headertitle"><div class="title">ripple::NodeStore::EncodedBlob Class Reference</div></div>
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<p>Convert a <a class="el" href="classripple_1_1NodeObject.html" title="A simple object that the Ledger uses to store entries.">NodeObject</a> from in-memory to database format.
<a href="classripple_1_1NodeStore_1_1EncodedBlob.html#details">More...</a></p>
<p><code>#include &lt;<a class="el" href="EncodedBlob_8h_source.html">EncodedBlob.h</a>&gt;</code></p>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="pub-methods" name="pub-methods"></a>
Public Member Functions</h2></td></tr>
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Private Attributes</h2></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Convert a <a class="el" href="classripple_1_1NodeObject.html" title="A simple object that the Ledger uses to store entries.">NodeObject</a> from in-memory to database format. </p>
<p>The (suboptimal) database format consists of:</p>
<ul>
<li>8 prefix bytes which will typically be 0, but don't assume that's the case; earlier versions of the code would use these bytes to store the ledger index either once or twice.</li>
<li>A single byte denoting the type of the object.</li>
<li>The payload.</li>
</ul>
<dl class="section note"><dt>Note</dt><dd>This class is typically instantiated on the stack, so the size of the object does not matter as much as it normally would since the allocation is, effectively, free.</dd></dl>
<p>We leverage that fact to preallocate enough memory to handle most payloads as part of this object, eliminating the need for dynamic allocation. As of this writing ~94% of objects require fewer than 1024 payload bytes. </p>
<p class="definition">Definition at line <a class="el" href="EncodedBlob_8h_source.html#l00056">56</a> of file <a class="el" href="EncodedBlob_8h_source.html">EncodedBlob.h</a>.</p>
</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
<a id="a221aefffbd9a5f654812b8b3eaf2a580" name="a221aefffbd9a5f654812b8b3eaf2a580"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a221aefffbd9a5f654812b8b3eaf2a580">&#9670;&#160;</a></span>EncodedBlob()</h2>
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<td class="memname">ripple::NodeStore::EncodedBlob::EncodedBlob </td>
<td>(</td>
<td class="paramtype"><a class="elRef" href="http://en.cppreference.com/w/cpp/memory/shared_ptr.html">std::shared_ptr</a>&lt; <a class="el" href="classripple_1_1NodeObject.html">NodeObject</a> &gt; const &amp;&#160;</td>
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<p class="definition">Definition at line <a class="el" href="EncodedBlob_8h_source.html#l00083">83</a> of file <a class="el" href="EncodedBlob_8h_source.html">EncodedBlob.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#af2b6c9c12f0f8bdf5b176b04493b1b6d">&#9670;&#160;</a></span>~EncodedBlob()</h2>
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<td class="memname">ripple::NodeStore::EncodedBlob::~EncodedBlob </td>
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<p class="definition">Definition at line <a class="el" href="EncodedBlob_8h_source.html#l00105">105</a> of file <a class="el" href="EncodedBlob_8h_source.html">EncodedBlob.h</a>.</p>
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<h2 class="groupheader">Member Function Documentation</h2>
<a id="a52f586950f56d2f0fe3cd7aa9ab577b2" name="a52f586950f56d2f0fe3cd7aa9ab577b2"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a52f586950f56d2f0fe3cd7aa9ab577b2">&#9670;&#160;</a></span>getKey()</h2>
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<td class="memname">void const * ripple::NodeStore::EncodedBlob::getKey </td>
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<p class="definition">Definition at line <a class="el" href="EncodedBlob_8h_source.html#l00118">118</a> of file <a class="el" href="EncodedBlob_8h_source.html">EncodedBlob.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a709e5c71eeb5b9a9eb635b9c02143815">&#9670;&#160;</a></span>getSize()</h2>
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<td class="memname"><a class="elRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> ripple::NodeStore::EncodedBlob::getSize </td>
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<p class="definition">Definition at line <a class="el" href="EncodedBlob_8h_source.html#l00124">124</a> of file <a class="el" href="EncodedBlob_8h_source.html">EncodedBlob.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ad237495e03b3368322d719d6733eb136">&#9670;&#160;</a></span>getData()</h2>
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<td class="memname">void const * ripple::NodeStore::EncodedBlob::getData </td>
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<p class="definition">Definition at line <a class="el" href="EncodedBlob_8h_source.html#l00130">130</a> of file <a class="el" href="EncodedBlob_8h_source.html">EncodedBlob.h</a>.</p>
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<h2 class="groupheader">Member Data Documentation</h2>
<a id="a64f2653ac2eab9dec5b90bed5ed96d01" name="a64f2653ac2eab9dec5b90bed5ed96d01"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a64f2653ac2eab9dec5b90bed5ed96d01">&#9670;&#160;</a></span>key_</h2>
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<td class="memname"><a class="elRef" href="http://en.cppreference.com/w/cpp/container/array.html">std::array</a>&lt;<a class="elRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a>, 32&gt; ripple::NodeStore::EncodedBlob::key_</td>
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<p>The 32-byte key of the serialized object. </p>
<p class="definition">Definition at line <a class="el" href="EncodedBlob_8h_source.html#l00059">59</a> of file <a class="el" href="EncodedBlob_8h_source.html">EncodedBlob.h</a>.</p>
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<p>A pre-allocated buffer for the serialized object. </p>
<p>The buffer is large enough for the 9 byte prefix and at least 1024 more bytes. The precise size is calculated automatically at compile time so as to avoid wasting space on padding bytes. </p>
<p class="definition">Definition at line <a class="el" href="EncodedBlob_8h_source.html#l00070">70</a> of file <a class="el" href="EncodedBlob_8h_source.html">EncodedBlob.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a4d8e95ca03dbc2111884996b82e48946">&#9670;&#160;</a></span>size_</h2>
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<td class="memname"><a class="elRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint32_t</a> ripple::NodeStore::EncodedBlob::size_</td>
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<p>The size of the serialized data. </p>
<p class="definition">Definition at line <a class="el" href="EncodedBlob_8h_source.html#l00073">73</a> of file <a class="el" href="EncodedBlob_8h_source.html">EncodedBlob.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a10bbc21ed0f8ebf02598040431ec40a4">&#9670;&#160;</a></span>ptr_</h2>
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<td class="memname"><a class="elRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a>* const ripple::NodeStore::EncodedBlob::ptr_</td>
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<p>A pointer to the serialized data. </p>
<p>This may point to the pre-allocated buffer (if it is sufficiently large) or to a dynamically allocated buffer. </p>
<p class="definition">Definition at line <a class="el" href="EncodedBlob_8h_source.html#l00080">80</a> of file <a class="el" href="EncodedBlob_8h_source.html">EncodedBlob.h</a>.</p>
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