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<h2>
<span class="refentrytitle">readfi</span>
</h2>
<p>readfi —
Read a line of text from an external file.
</p>
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<div class="refsect1" title="Description">
<a id="idp40132728"></a>
<h2>Description</h2>
<p>
Read a line of text from an external file once on initialisation.
</p>
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<div class="refsect1" title="Syntax">
<a id="idp40169816"></a>
<h2>Syntax</h2>
<pre class="synopsis">Sres <span class="command"><strong>readfi</strong></span> ifilname</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp40170840"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ifilname</em></span> -- an integer N denoting a file named "input.N" or a character string (in double quotes, spaces permitted) denoting the external file name. For a string, it may either be a full path name with directory specified or a simple filename. In the later case, the file is sought first in the current directory, then in SSDIR, and finally in SFDIR.
</p>
<p>
<span class="emphasis"><em>Sres</em></span> -- output of the line read from <span class="emphasis"><em>ifilname</em></span>.
</p>
<p>
This opcode allows a line of text to be read from a named
external file. There may be any number of
<span class="emphasis"><em>readfi</em></span> opcodes in an instrument or orchestra
but they read separately from the same or different files.
</p>
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<div class="refsect1" title="Examples">
<a id="idp40173320"></a>
<h2>Examples</h2>
<p>
Here is an example of the readfi opcode. It uses the file <a class="ulink" href="examples/readfi.csd" target="_top"><em class="citetitle">readfi.csd</em></a>.
</p>
<div class="example">
<a id="idp40174288"></a>
<p class="title">
<strong>Example 705. Example of the readfi 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>
-n
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="oblock">instr</span> 1
Swd pwd
<span class="opc">printf_i</span> "Working directory is '<span class="op">%</span>s'\n", 1, Swd
<span class="opc">prints</span> "Reading myself <span class="op">=</span>)<span class="op">:</span>\n"
<span class="olabel">read</span><span class="op">:</span>
Sline, iLineNum readfi "readfi.csd"
<span class="opc">printf_i</span> "Line <span class="op">%</span>d<span class="op">:</span> <span class="op">%</span>s", iLineNum, iLineNum, Sline
<span class="octrl">if</span> iLineNum <span class="op"><</span> 17 <span class="octrl">igoto</span> <span class="olabel">read</span>
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span>1 0 0.1
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
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</div>
<p><br class="example-break" />
</p>
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<div class="refsect1" title="See Also">
<a id="idp40176560"></a>
<h2>See Also</h2>
<p>
<a class="link" href="readf.html" title="readf"><em class="citetitle">readf</em></a>.
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp40177592"></a>
<h2>Credits</h2>
<p>John ffitch and Joachim Heintz</p>
<p>2012; new in 5.17.12</p>
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