| 1 | <!DOCTYPE html> <html> <head> <title>FixedLengthByteIterable.coffee</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <link rel="stylesheet" media="all" href="docco.css" /> </head> <body> <div id="container"> <div id="background"></div> <div id="jump_to"> Jump To … <div id="jump_wrapper"> <div id="jump_page"> <a class="source" href="ByteIterable.html"> ByteIterable.coffee </a> <a class="source" href="ByteIterator.html"> ByteIterator.coffee </a> <a class="source" href="ArrayByteIterable.html"> ArrayByteIterable.coffee </a> <a class="source" href="ByteIterableBase.html"> ByteIterableBase.coffee </a> <a class="source" href="ByteIterableUtil.html"> ByteIterableUtil.coffee </a> <a class="source" href="LightOutputStream.html"> LightOutputStream.coffee </a> <a class="source" href="StoreConfiguration.html"> StoreConfiguration.coffee </a> <a class="source" href="Reader.html"> Reader.coffee </a> <a class="source" href="Writer.html"> Writer.coffee </a> <a class="source" href="List.html"> List.coffee </a> <a class="source" href="ListNode.html"> ListNode.coffee </a> <a class="source" href="Cursor.html"> Cursor.coffee </a> <a class="source" href="DatabaseRoot.html"> DatabaseRoot.coffee </a> <a class="source" href="Environment.html"> Environment.coffee </a> <a class="source" href="EnvironmentConfig.html"> EnvironmentConfig.coffee </a> <a class="source" href="Store.html"> Store.coffee </a> <a class="source" href="Transaction.html"> Transaction.coffee </a> <a class="source" href="Addr64.html"> Addr64.coffee </a> <a class="source" href="DataIterator.html"> DataIterator.coffee </a> <a class="source" href="Log.html"> Log.coffee </a> <a class="source" href="LogCache.html"> LogCache.coffee </a> <a class="source" href="LogConfig.html"> LogConfig.coffee </a> <a class="source" href="LogUtil.html"> LogUtil.coffee </a> <a class="source" href="Loggable.html"> Loggable.coffee </a> <a class="source" href="LoggableFactory.html"> LoggableFactory.coffee </a> <a class="source" href="LoggableIterator.html"> LoggableIterator.coffee </a> <a class="source" href="LoggableToWrite.html"> LoggableToWrite.coffee </a> <a class="source" href="NullLoggable.html"> NullLoggable.coffee </a> <a class="source" href="RandomAccessByteIterable.html"> RandomAccessByteIterable.coffee </a> <a class="source" href="RandomAccessLoggable.html"> RandomAccessLoggable.coffee </a> <a class="source" href="RandomAccessLoggableIterator.html"> RandomAccessLoggableIterator.coffee </a> <a class="source" href="StackList.html"> StackList.coffee </a> <a class="source" href="CompoundByteIterable.html"> CompoundByteIterable.coffee </a> <a class="source" href="CompoundByteIteratorBase.html"> CompoundByteIteratorBase.coffee </a> <a class="source" href="CompressedUnsignedLongByteIterable.html"> CompressedUnsignedLongByteIterable.coffee </a> <a class="source" href="FixedLengthByteIterable.html"> FixedLengthByteIterable.coffee </a> </div> </div> </div> <table cellpadding="0" cellspacing="0"> <thead> <tr> <th class="docs"> <h1> FixedLengthByteIterable.coffee </h1> </th> <th class="code"> </th> </tr> </thead> <tbody> <tr id="section-1"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-1">¶</a> </div> </td> <td class="code"> <div class="highlight"><pre><span class="nv">ByteIterableBase =</span>
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| 2 | <span class="p">(</span><span class="nx">require</span> <span class="s1">'../../database/impl/iterate/ByteIterableBase.coffee'</span><span class="p">).</span>
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| 3 | <span class="nx">ByteIterableBase</span>
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| 4 | <span class="nv">RandomAccessByteIterable =</span>
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| 5 | <span class="p">(</span><span class="nx">require</span> <span class="s1">'../RandomAccessByteIterable.coffee'</span><span class="p">).</span><span class="nx">RandomAccessByteIterable</span>
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| 6 | <span class="nv">ByteIterator =</span>
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| 7 | <span class="p">(</span><span class="nx">require</span> <span class="s1">'../../database/ByteIterator.coffee'</span><span class="p">).</span><span class="nx">ByteIterator</span>
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| 8 | <span class="nv">ExodusError = </span><span class="p">(</span><span class="nx">require</span> <span class="s1">'../../errors/ExodusError.coffee'</span><span class="p">).</span><span class="nx">ExodusError</span></pre></div> </td> </tr> <tr id="section-2"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-2">¶</a> </div> <p>This class allows working with fixed parts of other iterables.</p> </td> <td class="code"> <div class="highlight"><pre><span class="k">class</span> <span class="nx">FixedLengthByteIterable</span> <span class="k">extends</span> <span class="nx">ByteIterableBase</span></pre></div> </td> </tr> <tr id="section-3"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-3">¶</a> </div> <p>@private</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nv">source: </span><span class="kc">undefined</span></pre></div> </td> </tr> <tr id="section-4"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-4">¶</a> </div> <p>@private</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nv">offset: </span><span class="kc">undefined</span></pre></div> </td> </tr> <tr id="section-5"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-5">¶</a> </div> <p>Constructor.</p>
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| 9 |
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| 10 | <p>@param source the base ByteIterable.
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| 11 | @param offset the offset inside iterable.
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| 12 | @param length the length of data of the source to be used.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">@create$ByteIterable$int</span><span class="nv">$int: </span><span class="nf">(source, offset, length, o) -></span>
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| 13 | <span class="k">if</span> <span class="nx">length</span> <span class="o"><</span> <span class="mi">0</span>
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| 14 | <span class="k">throw</span> <span class="k">new</span> <span class="nx">ExodusError</span><span class="p">(</span><span class="s2">"ByteIterable length can't be less than zero"</span><span class="p">)</span>
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| 15 | <span class="k">if</span> <span class="o">!</span><span class="nx">o</span><span class="o">?</span> <span class="k">then</span> <span class="nv">o = </span><span class="k">new</span> <span class="nx">FixedLengthByteIterable</span>
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| 16 | <span class="nv">o.source = </span><span class="nx">source</span>
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| 17 | <span class="nv">o.offset = </span><span class="nx">offset</span>
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| 18 | <span class="nv">o.length = </span><span class="nx">length</span>
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| 19 | <span class="k">return</span> <span class="nx">o</span></pre></div> </td> </tr> <tr id="section-6"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-6">¶</a> </div> <p>Constructor.</p>
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| 20 |
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| 21 | <p>@param source the base ByteIterable.
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| 22 | @param length the length of data of the source to be used.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">@create$ByteIterable</span><span class="nv">$int: </span><span class="nf">(source, length, o) -></span>
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| 23 | <span class="k">return</span> <span class="nx">FixedLengthByteIterable</span><span class="p">.</span><span class="nx">create$ByteIterable$int$int</span> <span class="nx">source</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span>
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| 24 | <span class="nx">length</span><span class="p">,</span> <span class="nx">o</span></pre></div> </td> </tr> <tr id="section-7"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-7">¶</a> </div> <p>Compare this iterable to another.</p>
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| 25 |
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| 26 | <p>@param right another iterable.
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| 27 | @return always emits 'compare' event with number (see
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| 28 | ByteIterableUtil.compare$ByteIterable$ByteIterable).</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">compareTo$ByteIterable</span><span class="nv">$emit: </span><span class="nf">(right) -></span>
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| 29 | <span class="nv">onCompare = </span><span class="p">(</span><span class="nx">res</span><span class="p">)</span> <span class="o">=></span>
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| 30 | <span class="nx">@emit</span> <span class="s1">'compare'</span><span class="p">,</span> <span class="nx">res</span>
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| 31 | <span class="k">if</span> <span class="nx">@source</span> <span class="k">instanceof</span> <span class="nx">RandomAccessByteIterable</span>
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| 32 | <span class="nx">@source</span><span class="p">.</span><span class="nx">once</span> <span class="s1">'compare'</span><span class="p">,</span> <span class="p">(</span><span class="nx">res</span><span class="p">)</span> <span class="o">=></span>
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| 33 | <span class="nx">onCompare</span> <span class="nx">res</span>
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| 34 | <span class="nv">res = </span><span class="nx">@source</span><span class="p">.</span><span class="nx">compare$int$int$ByteIterable$emit</span> <span class="mi">0</span><span class="p">,</span> <span class="nx">@length</span><span class="p">,</span> <span class="nx">right</span>
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| 35 | <span class="k">if</span> <span class="nx">res</span><span class="o">?</span>
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| 36 | <span class="nx">@source</span><span class="p">.</span><span class="nx">removeAllListeners</span> <span class="s1">'compare'</span>
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| 37 | <span class="nx">onCompare</span> <span class="nx">res</span>
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| 38 | <span class="k">else</span>
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| 39 | <span class="nv">res = </span><span class="nx">@source</span><span class="p">.</span><span class="nx">compareTo$ByteIterable$emit</span> <span class="nx">right</span>
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| 40 | <span class="nx">onCompare</span> <span class="nx">res</span>
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| 41 |
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| 42 | <span class="nv">getLength: </span><span class="nf">() -></span>
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| 43 | <span class="k">return</span> <span class="nx">@length</span></pre></div> </td> </tr> <tr id="section-8"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-8">¶</a> </div> <p>@protected</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nv">getIterator: </span><span class="nf">() -></span>
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| 44 | <span class="k">if</span> <span class="nx">@length</span> <span class="o">==</span> <span class="mi">0</span>
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| 45 | <span class="k">return</span> <span class="nx">ByteIterableBase</span><span class="p">.</span><span class="nx">EMPTY_ITERATOR</span>
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| 46 | <span class="nv">bi = </span><span class="nx">@source</span><span class="p">.</span><span class="nx">iterator</span><span class="p">()</span>
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| 47 | <span class="nx">bi</span><span class="p">.</span><span class="nx">skip$int</span> <span class="nx">@offset</span>
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| 48 | <span class="nv">res = </span><span class="k">new</span> <span class="nx">ByteIterator</span><span class="p">()</span>
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| 49 | <span class="nv">res.i = </span><span class="nx">@length</span>
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| 50 | <span class="nx">res</span><span class="p">.</span><span class="nx">hasNext</span><span class="nv">$emit = </span><span class="nf">() -></span>
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| 51 | <span class="nx">bi</span><span class="p">.</span><span class="nx">once</span> <span class="s1">'hasNext'</span><span class="p">,</span> <span class="p">(</span><span class="nx">hasNext</span><span class="p">)</span> <span class="o">=></span>
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| 52 | <span class="nx">@emit</span> <span class="s1">'hasNext'</span><span class="p">,</span> <span class="nx">@i</span> <span class="o">></span> <span class="mi">0</span> <span class="o">&&</span> <span class="nx">hasNext</span>
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| 53 | <span class="nv">hasNext = </span><span class="nx">bi</span><span class="p">.</span><span class="nx">hasNext$emit</span><span class="p">()</span>
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| 54 | <span class="k">if</span> <span class="nx">hasNext</span><span class="o">?</span>
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| 55 | <span class="nx">bi</span><span class="p">.</span><span class="nx">removeAllListeners</span> <span class="s1">'hasNext'</span>
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| 56 | <span class="k">return</span> <span class="nx">@i</span> <span class="o">></span> <span class="mi">0</span> <span class="o">&&</span> <span class="nx">hasNext</span>
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| 57 | <span class="k">else</span>
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| 58 | <span class="k">return</span> <span class="kc">undefined</span>
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| 59 | <span class="nx">res</span><span class="p">.</span><span class="nx">next</span><span class="nv">$emit = </span><span class="nf">() -></span>
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| 60 | <span class="nx">@i</span> <span class="o">-=</span> <span class="mi">1</span>
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| 61 | <span class="nx">bi</span><span class="p">.</span><span class="nx">once</span> <span class="s1">'next'</span><span class="p">,</span> <span class="p">(</span><span class="nx">next</span><span class="p">)</span> <span class="o">=></span>
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| 62 | <span class="nx">@emit</span> <span class="s1">'next'</span><span class="p">,</span> <span class="nx">next</span>
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| 63 | <span class="nv">next = </span><span class="nx">bi</span><span class="p">.</span><span class="nx">next$emit</span><span class="p">()</span>
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| 64 | <span class="k">if</span> <span class="nx">next</span><span class="o">?</span>
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| 65 | <span class="nx">bi</span><span class="p">.</span><span class="nx">removeAllListeners</span> <span class="s1">'next'</span>
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| 66 | <span class="k">return</span> <span class="nx">next</span>
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| 67 | <span class="k">else</span>
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| 68 | <span class="k">return</span> <span class="kc">undefined</span>
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| 69 | <span class="nx">res</span><span class="p">.</span><span class="nx">skip</span><span class="nv">$int = </span><span class="nf">(length) -></span>
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| 70 | <span class="nv">result = </span><span class="nx">bi</span><span class="p">.</span><span class="nx">skip</span> <span class="nb">Math</span><span class="p">.</span><span class="nx">min</span> <span class="nx">@length</span><span class="p">,</span> <span class="nx">@i</span>
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| 71 | <span class="nx">@i</span> <span class="o">-=</span> <span class="nx">result</span>
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| 72 | <span class="k">return</span> <span class="nx">result</span>
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| 73 | <span class="k">return</span> <span class="nx">res</span>
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| 74 |
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| 75 | <span class="nv">exports.FixedLengthByteIterable = </span><span class="nx">FixedLengthByteIterable</span>
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| 76 |
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| 77 | </pre></div> </td> </tr> </tbody> </table> </div> </body> </html> |
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