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-<html>
-<head>
- <title>
- Emscripten: CubeScript
- </title>
- <script src="cubescript.js"></script>
- <script>
- // print function which the cubescript engine will call
- function print(text) {
- document.getElementById('output').innerHTML += text + '<br>';
- printed = true;
- }
-
- function execute(text) {
- printed = false;
- executeCS(text);
- if (!printed) {
- print('<small><i>(no output)</i></small>');
- }
- }
- </script>
-</head>
-<body onload="document.getElementById('the_input').focus()">
- <p>
- This is an <a href="http://emscripten.org">Emscriptened</a> <a href="http://sauerbraten.org/docs/config.html#cubescript">CubeScript</a> engine.
- The CubeScript engine from <a href="http://sauerbraten.org">Sauerbraten</a>, which is about 2,500 lines of C++, was compiled by
- <a href="http://llvm.org/cmds/llvmgcc.html">llvm-gcc</a> into <a href="http://llvm.org/">LLVM</a> bitcode,
- which was translated by Emscripten into JavaScript, which
- you can run in your browser here. In other words, it's a script engine (for one language, and written in C++) running in another script engine
- (the JavaScript engine in your browser, which is incidentally also written in C++, most likely).
- </p>
- </p>
- Why? <i>[insert Internet meme joke here]</i> Seriously, though, this is a test of the capabilities of
- <a href="http://emscripten.org">Emscripten</a>, since the CubeScript engine uses fairly complicated C++ (even stuff like
- manually copying vtable pointers), and since compiling an actual, complete script engine seems like a useful milestone.
- Also, it's a potential first step
- towards bringing <a href="http://www.syntensity.com">Syntensity</a> (which is based on Sauerbraten) to the web.
- </p>
- <hr>
- <p>
- <b>Instructions</b>: For example, try entering the following commands in the input field below:
- <ul>
- <li><div style="font-family: Courier New,Courier,monospace;">echo Hello world</div></li>
- <li><div style="font-family: Courier New,Courier,monospace;">x = 3 </div> <small><i>(note the spaces around the '=')</i></small></li>
- <li><div style="font-family: Courier New,Courier,monospace;">echo $x</div></li>
- <li><div style="font-family: Courier New,Courier,monospace;">echo Another number: (+ $x (* 5 10)) </div><small><i>(note the prefix notation, that is the same as <b>$x + (5*10)</b>)</i></small></li>
- <li><div style="font-family: Courier New,Courier,monospace;">if (> $x 2) [ echo "x is bigger than 2" ] [ echo "x is not bigger than 2" ]</div></li>
- </ul>
- Check out the CubeScript <a href="http://sauerbraten.org/docs/config.html#cubescript">docs</a> or
- <a href="http://cube.wikispaces.com/Cubescript+Tutorial">tutorial</a>
- for more (but, they mainly talk about using CubeScript in Sauerbraten itself - much like most
- JavaScript tutorials talk about using JavaScript in a web browser).
- </p>
- <hr>
- <!-- Call the cubescript engine's execute() function -->
- <form onsubmit="execute(the_input.value); the_input.value = ''; return false">
- <b>Enter some CubeScript</b>:
- <input type="text" id="the_input">
- <input type="submit" value="execute">
- </form>
- <hr>
- <div id="output" style="font-family: Courier New,Courier,monospace;"></div>
-</body>
-</html>
-