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+  <li><a href="../examples/compat.lua.html">compat.lua</a></li>
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+  <li><strong>terminalsize.lua</strong></li>
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+
+    <h2>terminalsize.lua</h2>
+<pre>
+<span class="keyword">local</span> sys = <span class="global">require</span>(<span class="string">"system"</span>)
+
+sys.<span class="function-name">autotermrestore</span>()  <span class="comment">-- set up auto restore of terminal settings on exit
+</span>
+<span class="comment">-- setup Windows console to handle ANSI processing
+</span>sys.<span class="function-name">setconsoleflags</span>(<span class="global">io</span>.stdout, sys.<span class="function-name">getconsoleflags</span>(<span class="global">io</span>.stdout) + sys.COF_VIRTUAL_TERMINAL_PROCESSING)
+sys.<span class="function-name">setconsoleflags</span>(<span class="global">io</span>.stdin, sys.<span class="function-name">getconsoleflags</span>(<span class="global">io</span>.stdin) + sys.CIF_VIRTUAL_TERMINAL_INPUT)
+
+<span class="comment">-- setup Posix to disable canonical mode and echo
+</span><span class="keyword">local</span> of_attr = sys.<span class="function-name">tcgetattr</span>(<span class="global">io</span>.stdin)
+sys.<span class="function-name">setnonblock</span>(<span class="global">io</span>.stdin, <span class="keyword">true</span>)
+sys.<span class="function-name">tcsetattr</span>(<span class="global">io</span>.stdin, sys.TCSANOW, {
+  lflag = of_attr.lflag - sys.L_ICANON - sys.L_ECHO, <span class="comment">-- disable canonical mode and echo
+</span>})
+
+
+<span class="comment">-- generate string to move cursor horizontally
+</span><span class="comment">-- positive goes right, negative goes left
+</span><span class="keyword">local</span> <span class="keyword">function</span> <span class="function-name">cursor_move_horiz</span>(n)
+  <span class="keyword">if</span> n == <span class="number">0</span> <span class="keyword">then</span>
+    <span class="keyword">return</span> <span class="string">""</span>
+  <span class="keyword">end</span>
+  <span class="keyword">return</span> <span class="string">"\27["</span> .. (n &gt; <span class="number">0</span> <span class="keyword">and</span> n <span class="keyword">or</span> -n) .. (n &gt; <span class="number">0</span> <span class="keyword">and</span> <span class="string">"C"</span> <span class="keyword">or</span> <span class="string">"D"</span>)
+<span class="keyword">end</span>
+
+
+<span class="keyword">local</span> rows, cols
+<span class="global">print</span>(<span class="string">"Change the terminal window size, press any key to exit"</span>)
+<span class="keyword">while</span> <span class="keyword">not</span> sys.<span class="function-name">readansi</span>(<span class="number">0.2</span>) <span class="keyword">do</span>  <span class="comment">-- use readansi to not leave stray bytes in the input buffer
+</span>  <span class="keyword">local</span> nrows, ncols = sys.<span class="function-name">termsize</span>()
+  <span class="keyword">if</span> rows ~= nrows <span class="keyword">or</span> cols ~= ncols <span class="keyword">then</span>
+    rows, cols = nrows, ncols
+    <span class="keyword">local</span> text = <span class="string">"Terminal size: "</span> .. rows .. <span class="string">"x"</span> .. cols .. <span class="string">"     "</span>
+    <span class="global">io</span>.<span class="function-name">write</span>(text .. <span class="function-name">cursor_move_horiz</span>(-#text))
+    <span class="global">io</span>.<span class="function-name">flush</span>()
+  <span class="keyword">end</span>
+<span class="keyword">end</span></pre>
+
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