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stasis/je-7.5.11/docs/java/com/sleepycat/util/PackedInteger.html
Greg Burd 1d088e4a23 initial import
2019-06-25 16:12:40 -04:00

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<div class="aboutLanguage"><b>Berkeley DB Java Edition</b><br><font size=\"-1\"> version 7.5.11</font>
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<div class="subTitle">com.sleepycat.util</div>
<h2 title="Class PackedInteger" class="title">Class PackedInteger</h2>
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<li>java.lang.Object</li>
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<pre>public class <span class="typeNameLabel">PackedInteger</span>
extends java.lang.Object</pre>
<div class="block">Static methods for reading and writing packed integers.
<p>Most applications should use the classes in the <a href="../../../com/sleepycat/bind/tuple/package-summary.html"><code>com.sleepycat.bind.tuple</code></a> package rather than using this class directly.</p></div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../bind/tuple/package-summary.html#integerFormats">Integer Formats</a></dd>
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<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#MAX_LENGTH">MAX_LENGTH</a></span></code>
<div class="block">The maximum number of bytes needed to store an int value (5).</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#MAX_LONG_LENGTH">MAX_LONG_LENGTH</a></span></code>
<div class="block">The maximum number of bytes needed to store a long value (9).</div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#PackedInteger--">PackedInteger</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#getReadIntLength-byte:A-int-">getReadIntLength</a></span>(byte[]&nbsp;buf,
int&nbsp;off)</code>
<div class="block">Returns the number of bytes that would be read by <a href="../../../com/sleepycat/util/PackedInteger.html#readInt-byte:A-int-"><code>readInt(byte[], int)</code></a>.</div>
</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#getReadLongLength-byte:A-int-">getReadLongLength</a></span>(byte[]&nbsp;buf,
int&nbsp;off)</code>
<div class="block">Returns the number of bytes that would be read by <a href="../../../com/sleepycat/util/PackedInteger.html#readLong-byte:A-int-"><code>readLong(byte[], int)</code></a>.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#getReadSortedIntLength-byte:A-int-">getReadSortedIntLength</a></span>(byte[]&nbsp;buf,
int&nbsp;off)</code>
<div class="block">Returns the number of bytes that would be read by <a href="../../../com/sleepycat/util/PackedInteger.html#readSortedInt-byte:A-int-"><code>readSortedInt(byte[], int)</code></a>.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#getReadSortedLongLength-byte:A-int-">getReadSortedLongLength</a></span>(byte[]&nbsp;buf,
int&nbsp;off)</code>
<div class="block">Returns the number of bytes that would be read by <a href="../../../com/sleepycat/util/PackedInteger.html#readSortedLong-byte:A-int-"><code>readSortedLong(byte[], int)</code></a>.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#getWriteIntLength-int-">getWriteIntLength</a></span>(int&nbsp;value)</code>
<div class="block">Returns the number of bytes that would be written by <a href="../../../com/sleepycat/util/PackedInteger.html#writeInt-byte:A-int-int-"><code>writeInt(byte[], int, int)</code></a>.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#getWriteLongLength-long-">getWriteLongLength</a></span>(long&nbsp;value)</code>
<div class="block">Returns the number of bytes that would be written by <a href="../../../com/sleepycat/util/PackedInteger.html#writeLong-byte:A-int-long-"><code>writeLong(byte[], int, long)</code></a>.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#getWriteSortedIntLength-int-">getWriteSortedIntLength</a></span>(int&nbsp;value)</code>
<div class="block">Returns the number of bytes that would be written by <a href="../../../com/sleepycat/util/PackedInteger.html#writeSortedInt-byte:A-int-int-"><code>writeSortedInt(byte[], int, int)</code></a>.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#getWriteSortedLongLength-long-">getWriteSortedLongLength</a></span>(long&nbsp;value)</code>
<div class="block">Returns the number of bytes that would be written by <a href="../../../com/sleepycat/util/PackedInteger.html#writeSortedLong-byte:A-int-long-"><code>writeSortedLong(byte[], int, long)</code></a>.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#readInt-byte:A-int-">readInt</a></span>(byte[]&nbsp;buf,
int&nbsp;off)</code>
<div class="block">Reads a packed integer at the given buffer offset and returns it.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#readLong-byte:A-int-">readLong</a></span>(byte[]&nbsp;buf,
int&nbsp;off)</code>
<div class="block">Reads a packed long integer at the given buffer offset and returns it.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#readSortedInt-byte:A-int-">readSortedInt</a></span>(byte[]&nbsp;buf,
int&nbsp;off)</code>
<div class="block">Reads a sorted packed integer at the given buffer offset and returns it.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#readSortedLong-byte:A-int-">readSortedLong</a></span>(byte[]&nbsp;buf,
int&nbsp;off)</code>
<div class="block">Reads a sorted packed long integer at the given buffer offset and
returns it.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#writeInt-byte:A-int-int-">writeInt</a></span>(byte[]&nbsp;buf,
int&nbsp;offset,
int&nbsp;value)</code>
<div class="block">Writes a packed integer starting at the given buffer offset and returns
the next offset to be written.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#writeLong-byte:A-int-long-">writeLong</a></span>(byte[]&nbsp;buf,
int&nbsp;offset,
long&nbsp;value)</code>
<div class="block">Writes a packed long integer starting at the given buffer offset and
returns the next offset to be written.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#writeSortedInt-byte:A-int-int-">writeSortedInt</a></span>(byte[]&nbsp;buf,
int&nbsp;offset,
int&nbsp;value)</code>
<div class="block">Writes a packed sorted integer starting at the given buffer offset and
returns the next offset to be written.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/util/PackedInteger.html#writeSortedLong-byte:A-int-long-">writeSortedLong</a></span>(byte[]&nbsp;buf,
int&nbsp;offset,
long&nbsp;value)</code>
<div class="block">Writes a packed sorted long integer starting at the given buffer offset
and returns the next offset to be written.</div>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>MAX_LENGTH</h4>
<pre>public static final&nbsp;int MAX_LENGTH</pre>
<div class="block">The maximum number of bytes needed to store an int value (5).</div>
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<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../constant-values.html#com.sleepycat.util.PackedInteger.MAX_LENGTH">Constant Field Values</a></dd>
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<h4>MAX_LONG_LENGTH</h4>
<pre>public static final&nbsp;int MAX_LONG_LENGTH</pre>
<div class="block">The maximum number of bytes needed to store a long value (9).</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../constant-values.html#com.sleepycat.util.PackedInteger.MAX_LONG_LENGTH">Constant Field Values</a></dd>
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<h4>PackedInteger</h4>
<pre>public&nbsp;PackedInteger()</pre>
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<h4>readInt</h4>
<pre>public static&nbsp;int&nbsp;readInt(byte[]&nbsp;buf,
int&nbsp;off)</pre>
<div class="block">Reads a packed integer at the given buffer offset and returns it.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buf</code> - the buffer to read from.</dd>
<dd><code>off</code> - the offset in the buffer at which to start reading.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the integer that was read.</dd>
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<h4>readLong</h4>
<pre>public static&nbsp;long&nbsp;readLong(byte[]&nbsp;buf,
int&nbsp;off)</pre>
<div class="block">Reads a packed long integer at the given buffer offset and returns it.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buf</code> - the buffer to read from.</dd>
<dd><code>off</code> - the offset in the buffer at which to start reading.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the long integer that was read.</dd>
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<h4>getReadIntLength</h4>
<pre>public static&nbsp;int&nbsp;getReadIntLength(byte[]&nbsp;buf,
int&nbsp;off)</pre>
<div class="block">Returns the number of bytes that would be read by <a href="../../../com/sleepycat/util/PackedInteger.html#readInt-byte:A-int-"><code>readInt(byte[], int)</code></a>.
<p>Because the length is stored in the first byte, this method may be
called with only the first byte of the packed integer in the given
buffer. This method only accesses one byte at the given offset.</p></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buf</code> - the buffer to read from.</dd>
<dd><code>off</code> - the offset in the buffer at which to start reading.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of bytes that would be read.</dd>
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<h4>getReadLongLength</h4>
<pre>public static&nbsp;int&nbsp;getReadLongLength(byte[]&nbsp;buf,
int&nbsp;off)</pre>
<div class="block">Returns the number of bytes that would be read by <a href="../../../com/sleepycat/util/PackedInteger.html#readLong-byte:A-int-"><code>readLong(byte[], int)</code></a>.
<p>Because the length is stored in the first byte, this method may be
called with only the first byte of the packed integer in the given
buffer. This method only accesses one byte at the given offset.</p></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buf</code> - the buffer to read from.</dd>
<dd><code>off</code> - the offset in the buffer at which to start reading.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of bytes that would be read.</dd>
</dl>
</li>
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<h4>writeInt</h4>
<pre>public static&nbsp;int&nbsp;writeInt(byte[]&nbsp;buf,
int&nbsp;offset,
int&nbsp;value)</pre>
<div class="block">Writes a packed integer starting at the given buffer offset and returns
the next offset to be written.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buf</code> - the buffer to write to.</dd>
<dd><code>offset</code> - the offset in the buffer at which to start writing.</dd>
<dd><code>value</code> - the integer to be written.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the offset past the bytes written.</dd>
</dl>
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<h4>writeLong</h4>
<pre>public static&nbsp;int&nbsp;writeLong(byte[]&nbsp;buf,
int&nbsp;offset,
long&nbsp;value)</pre>
<div class="block">Writes a packed long integer starting at the given buffer offset and
returns the next offset to be written.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buf</code> - the buffer to write to.</dd>
<dd><code>offset</code> - the offset in the buffer at which to start writing.</dd>
<dd><code>value</code> - the long integer to be written.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the offset past the bytes written.</dd>
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<h4>getWriteIntLength</h4>
<pre>public static&nbsp;int&nbsp;getWriteIntLength(int&nbsp;value)</pre>
<div class="block">Returns the number of bytes that would be written by <a href="../../../com/sleepycat/util/PackedInteger.html#writeInt-byte:A-int-int-"><code>writeInt(byte[], int, int)</code></a>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>value</code> - the integer to be written.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of bytes that would be used to write the given
integer.</dd>
</dl>
</li>
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<h4>getWriteLongLength</h4>
<pre>public static&nbsp;int&nbsp;getWriteLongLength(long&nbsp;value)</pre>
<div class="block">Returns the number of bytes that would be written by <a href="../../../com/sleepycat/util/PackedInteger.html#writeLong-byte:A-int-long-"><code>writeLong(byte[], int, long)</code></a>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>value</code> - the long integer to be written.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of bytes that would be used to write the given long
integer.</dd>
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<h4>readSortedInt</h4>
<pre>public static&nbsp;int&nbsp;readSortedInt(byte[]&nbsp;buf,
int&nbsp;off)</pre>
<div class="block">Reads a sorted packed integer at the given buffer offset and returns it.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buf</code> - the buffer to read from.</dd>
<dd><code>off</code> - the offset in the buffer at which to start reading.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the integer that was read.</dd>
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<pre>public static&nbsp;long&nbsp;readSortedLong(byte[]&nbsp;buf,
int&nbsp;off)</pre>
<div class="block">Reads a sorted packed long integer at the given buffer offset and
returns it.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buf</code> - the buffer to read from.</dd>
<dd><code>off</code> - the offset in the buffer at which to start reading.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the long integer that was read.</dd>
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<pre>public static&nbsp;int&nbsp;getReadSortedIntLength(byte[]&nbsp;buf,
int&nbsp;off)</pre>
<div class="block">Returns the number of bytes that would be read by <a href="../../../com/sleepycat/util/PackedInteger.html#readSortedInt-byte:A-int-"><code>readSortedInt(byte[], int)</code></a>.
<p>Because the length is stored in the first byte, this method may be
called with only the first byte of the packed integer in the given
buffer. This method only accesses one byte at the given offset.</p></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buf</code> - the buffer to read from.</dd>
<dd><code>off</code> - the offset in the buffer at which to start reading.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of bytes that would be read.</dd>
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<pre>public static&nbsp;int&nbsp;getReadSortedLongLength(byte[]&nbsp;buf,
int&nbsp;off)</pre>
<div class="block">Returns the number of bytes that would be read by <a href="../../../com/sleepycat/util/PackedInteger.html#readSortedLong-byte:A-int-"><code>readSortedLong(byte[], int)</code></a>.
<p>Because the length is stored in the first byte, this method may be
called with only the first byte of the packed integer in the given
buffer. This method only accesses one byte at the given offset.</p></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buf</code> - the buffer to read from.</dd>
<dd><code>off</code> - the offset in the buffer at which to start reading.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of bytes that would be read.</dd>
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<pre>public static&nbsp;int&nbsp;writeSortedInt(byte[]&nbsp;buf,
int&nbsp;offset,
int&nbsp;value)</pre>
<div class="block">Writes a packed sorted integer starting at the given buffer offset and
returns the next offset to be written.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buf</code> - the buffer to write to.</dd>
<dd><code>offset</code> - the offset in the buffer at which to start writing.</dd>
<dd><code>value</code> - the integer to be written.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the offset past the bytes written.</dd>
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<pre>public static&nbsp;int&nbsp;writeSortedLong(byte[]&nbsp;buf,
int&nbsp;offset,
long&nbsp;value)</pre>
<div class="block">Writes a packed sorted long integer starting at the given buffer offset
and returns the next offset to be written.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buf</code> - the buffer to write to.</dd>
<dd><code>offset</code> - the offset in the buffer at which to start writing.</dd>
<dd><code>value</code> - the long integer to be written.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the offset past the bytes written.</dd>
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<pre>public static&nbsp;int&nbsp;getWriteSortedIntLength(int&nbsp;value)</pre>
<div class="block">Returns the number of bytes that would be written by <a href="../../../com/sleepycat/util/PackedInteger.html#writeSortedInt-byte:A-int-int-"><code>writeSortedInt(byte[], int, int)</code></a>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>value</code> - the integer to be written.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of bytes that would be used to write the given
integer.</dd>
</dl>
</li>
</ul>
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<pre>public static&nbsp;int&nbsp;getWriteSortedLongLength(long&nbsp;value)</pre>
<div class="block">Returns the number of bytes that would be written by <a href="../../../com/sleepycat/util/PackedInteger.html#writeSortedLong-byte:A-int-long-"><code>writeSortedLong(byte[], int, long)</code></a>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>value</code> - the long integer to be written.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of bytes that would be used to write the given long
integer.</dd>
</dl>
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