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<h2>
<span class="refentrytitle">tableng</span>
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<p>tableng —
Interrogates a function table for length.
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<div class="refsect1" title="Description">
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<h2>Description</h2>
<p>
Interrogates a function table for length.
</p>
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<div class="refsect1" title="Syntax">
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<h2>Syntax</h2>
<pre class="synopsis">ires <span class="command"><strong>tableng</strong></span> ifn</pre>
<pre class="synopsis">kres <span class="command"><strong>tableng</strong></span> kfn</pre>
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<div class="refsect1" title="Initialization">
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<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ifn</em></span> -- Table number to be interrogated
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<div class="refsect1" title="Performance">
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<h2>Performance</h2>
<p>
<span class="emphasis"><em>kfn</em></span> -- Table number to be interrogated
</p>
<p>
<span class="emphasis"><em>tableng</em></span> returns the length of the specified table. This will be a power of two number in most circumstances. It will not show whether a table has a guardpoint or not. It seems this information is not available in the table's data structure. If the specified table is not found, then 0 will be returned.
</p>
<p>
Likely to be useful for setting up code for table manipulation operations, such as <a class="link" href="tablemix.html" title="tablemix"><em class="citetitle">tablemix</em></a> and <a class="link" href="tablecopy.html" title="tablecopy"><em class="citetitle">tablecopy</em></a>.
</p>
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<div class="refsect1" title="Examples">
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<h2>Examples</h2>
<p>
Here is an example of the tableng opcode. It uses the file <a class="ulink" href="examples/tableng.csd" target="_top"><em class="citetitle">tableng.csd</em></a>.
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<div class="example">
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<p class="title">
<b>Example 613. Example of the tableng opcode.</b>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
<span class="comment">; Audio out Audio in</span>
-odac -iadc <span class="comment">;;;RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o tableng.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="comment">; Initialize the global variables.</span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">kr</span> <span class="op">=</span> 4410
<span class="ohdr">ksmps</span> <span class="op">=</span> 10
<span class="ohdr">nchnls</span> <span class="op">=</span> 1
<span class="comment">; Instrument #1.</span>
<span class="oblock">instr</span> 1
<span class="comment">; Let's look at Table #1.</span>
ifn <span class="op">=</span> 1
ilen <span class="opc">tableng</span> ifn
<span class="opc">print</span> ilen
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; Table #1, a sine wave.</span>
<span class="stamnt">f</span> 1 0 16384 10 1
<span class="comment">; Play Instrument #1 for one second.</span>
<span class="stamnt">i</span> 1 0 1
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
The table is 16,384 samples long. So its output should include a line like this:
</p>
<pre class="screen">
instr 1: ilen = 16384.000
</pre>
<p>
</p>
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<div class="refsect1" title="Credits">
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<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
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<td>Author: Robin Whittle</td>
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<td>Australia</td>
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<td>May 1997</td>
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<p>
</p>
<p>Example written by Kevin Conder.</p>
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