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<h1 class="firstHeading">Automation 4 unicode.lua</h1>
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<p>The <tt>unicode.lua</tt> include for Automation 4 Lua contains various helper functions for working with UTF-8 encoded text.
</p>
<table id="toc" class="toc" summary="Contents"><tr><td><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1"><a href="#unicode.charwidth"><span class="tocnumber">1</span> <span class="toctext">unicode.charwidth</span></a></li>
<li class="toclevel-1"><a href="#unicode.chars"><span class="tocnumber">2</span> <span class="toctext">unicode.chars</span></a></li>
<li class="toclevel-1"><a href="#unicode.len"><span class="tocnumber">3</span> <span class="toctext">unicode.len</span></a></li>
<li class="toclevel-1"><a href="#unicode.codepoint"><span class="tocnumber">4</span> <span class="toctext">unicode.codepoint</span></a></li>
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<a name="unicode.charwidth"></a><h2><span class="editsection">[edit]</span> <span class="mw-headline"> unicode.charwidth </span></h2>
<p>Synopsis: <code>width = unicode.charwidth(instring, index)</code>
</p><p>Returns the number of bytes occupied by the UTF-8 encoded character starting at position <code>index</code> in <code>instring</code>. The character pointed to is assumed to be a prefix byte.
</p><p>The <code>index</code> parameter is optional, it defaults to 1 (one) when left out, meaning the width of the first character in <code>instring</code> will be returned.
</p>
<a name="unicode.chars"></a><h2><span class="editsection">[edit]</span> <span class="mw-headline"> unicode.chars </span></h2>
<p>Synopsis: <code> for char = unicode.chars(instring) do ... end</code>
</p><p>Returns an iterator function for looping over all characters in the given UTF-8 encoded string. For each iteration of the loop, <code>char</code> will contain a string representing the next character in the string.
</p>
<a name="unicode.len"></a><h2><span class="editsection">[edit]</span> <span class="mw-headline"> unicode.len </span></h2>
<p>Synopsis: <code>length = unicode.len(instring)</code>
</p><p>Determine the length of the given UTF-8 encoded string.
</p><p>Be aware that this function does not run in constant time, but in linear time (O(N)) proportional to the number of Unicode characters in <code>instring</code>.
</p>
<a name="unicode.codepoint"></a><h2><span class="editsection">[edit]</span> <span class="mw-headline"> unicode.codepoint </span></h2>
<p>Synopsis: <code>val = unicode.codepoint(instring)</code>
</p><p>Calculate the Unicode codepoint for the first character in <code>instring</code>.
</p>
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cleantags.lua
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