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<h2>
<span class="refentrytitle">strsub</span>
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<p>strsub —
Extract a substring
</p>
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<div class="refsect1" title="Description">
<a id="idp46596648"></a>
<h2>Description</h2>
<p>
Return a substring of the source string. strsub runs at init time only.
</p>
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<div class="refsect1" title="Syntax">
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<h2>Syntax</h2>
<pre class="synopsis">Sdst <span class="command"><strong>strsub</strong></span> Ssrc[, istart[, iend]]</pre>
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<a id="idp46598408"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>istart</em></span>
(optional, defaults to 0) -- start position in Ssrc, counting from 0.
A negative value means the end of the string.
</p>
<p>
<span class="emphasis"><em>iend</em></span>
(optional, defaults to -1) -- end position in Ssrc, counting from 0.
A negative value means the end of the string. If iend is less than
istart, the output is reversed.
</p>
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<div class="refsect1" title="Examples">
<a id="idp46599960"></a>
<h2>Examples</h2>
<p>
Here is an example of the strsub opcode. It uses the file <a class="ulink" href="examples/strsub.csd" target="_top"><em class="citetitle">strsub.csd</em></a>.
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<div class="example">
<a id="idp46600928"></a>
<p class="title">
<strong>Example 835. Example of the strsub opcode.</strong>
</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 No messages</span>
-odac -iadc <span class="comment">;;;-d RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o strsub.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="comment">; By: Jonathan Murphy 2007</span>
<span class="oblock">instr</span> 1
Smember <span class="opc">strget</span> p4
<span class="comment">; Parse Smember</span>
istrlen <span class="opc">strlen</span> Smember
idelimiter <span class="opc">strindex</span> Smember, "<span class="op">:</span>"
S1 <span class="opc">strsub</span> Smember, 0, idelimiter <span class="comment">; "String1"</span>
S2 <span class="opc">strsub</span> Smember, idelimiter <span class="op">+</span> 1, istrlen <span class="comment">; "String2"</span>
<span class="opc">printf</span> "First string<span class="op">:</span> <span class="op">%</span>s\nSecond string<span class="op">:</span> <span class="op">%</span>s\n", 1, S1, S2
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span> 1 0 1 "Str<span class="stamnt">i</span>ng1:Str<span class="stamnt">i</span>ng2"
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
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<div class="refsect1" title="See also">
<a id="idp46603200"></a>
<h2>See also</h2>
<p>
<a class="link" href="strsubk.html" title="strsubk">
<em class="citetitle">strsubk</em>
</a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp46604088"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Istvan Varga</td>
</tr>
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<td>2006</td>
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