<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>readf</title> <link rel="stylesheet" type="text/css" href="csound.css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.76.1" /> <link rel="home" href="index.html" title="The Canonical Csound Reference Manual" /> <link rel="up" href="OpcodesTop.html" title="Orchestra Opcodes and Operators" /> <link rel="prev" href="readclock.html" title="readclock" /> <link rel="next" href="readfi.html" title="readfi" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">readf</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="readclock.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="readfi.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry" title="readf"> <a id="readf"></a> <div class="titlepage"></div> <a id="IndexReadf" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">readf</span> </h2> <p>readf — Read a line of text from an external file. </p> </div> <div class="refsect1" title="Description"> <a id="idp40102376"></a> <h2>Description</h2> <p> Read a line of text from an external file once each k-cycle. </p> </div> <div class="refsect1" title="Syntax"> <a id="idp40103048"></a> <h2>Syntax</h2> <pre class="synopsis">Sres <span class="command"><strong>readf</strong></span> ifilname</pre> </div> <div class="refsect1" title="Initialization"> <a id="idp40113488"></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> </div> <div class="refsect1" title="Performance"> <a id="idp40114656"></a> <h2>Performance</h2> <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>readf</em></span> opcodes in an instrument or orchestra but they read separately from the same or different files. </p> </div> <div class="refsect1" title="Examples"> <a id="idp40116328"></a> <h2>Examples</h2> <p> Here is an example of the readf opcode. It uses the file <a class="ulink" href="examples/readf.csd" target="_top"><em class="citetitle">readf.csd</em></a>. </p> <div class="example"> <a id="idp40117272"></a> <p class="title"> <strong>Example 704. Example of the readf 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, kLinNum readf "readf.csd" <span class="opc">printf</span> "Line <span class="op">%</span>d<span class="op">:</span> <span class="op">%</span>s", kLinNum, kLinNum, Sline <span class="octrl">if</span> kLinNum <span class="op">!=</span> <span class="op">-</span>1 then <span class="octrl">kgoto</span> <span class="olabel">read</span> <span class="octrl">else</span> <span class="opc">turnoff</span> <span class="octrl">endif</span> <span class="oblock">endin</span> <span class="csdtag"></CsInstruments></span> <span class="csdtag"><CsScore></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> </div> </div> <p><br class="example-break" /> </p> </div> <div class="refsect1" title="See Also"> <a id="idp40152120"></a> <h2>See Also</h2> <p> <a class="link" href="readfi.html" title="readfi"><em class="citetitle">readfi</em></a>. </p> </div> <div class="refsect1" title="Credits"> <a id="idp40153152"></a> <h2>Credits</h2> <p>John ffitch and Joachim Heintz</p> <p>2012; new in 5.17.12</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="readclock.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="OpcodesTop.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="readfi.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">readclock </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> readfi</td> </tr> </table> </div> </body> </html>