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isaac-test.htm
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>A javascript implementation of ISAAC</title>
<meta name="description" content="A javascript implementation of ISAAC" />
<meta name="author" content="Yves-Marie K. Rinquin" />
</head>
<body>
<pre id="txt"></pre>
<script src="isaac.js"></script>
<script>
var wrtZone = null;
function setWriteZone(id) { wrtZone = document.getElementById(id); }
function clear(){ wrtZone.innerHTML = ''; }
function write(txt) { wrtZone.appendChild(document.createTextNode(txt)); }
function writeln(txt) { write(txt + '\n'); }
setWriteZone('txt');
/* number to hexadecimal string representation /w padding */
Number.prototype.toHex = function(p) {
p = (!p) ? 0 : p;
var n = (this >>> 0).toString(16);
while(n.length < p) n = '0' + n;
return n;
}
isaac.internals.echo = function(){
var o = this();
writeln(
'a: 0x' + o.a.toHex(8) + ', ' +
'b: 0x' + o.b.toHex(8) + ', ' +
'c: 0x' + o.c.toHex(8)
);
}
isaac.internals.echor = function(){
var o = this();
for(var i = 0; i < 256; i++) {
write(o.r[i].toHex(8));
if((i & 7) == 7) writeln('');
}
}
/* how everything starts */
window.onload = function(){
/* --- intro --- */
writeln('--- some random values -----------------------------------------');
writeln('--- 1 run / seed = initial -------------------------------------');
for(var i = 0; i < 30; i++) {
write(isaac.random() + '; ');
if(!((i+1) % 3)) writeln('');
}
writeln('----------------------------------------------------------------' + '\n');
/* --- test 1 --- */
writeln('--- test 1: internals ------------------------------------------');
writeln('--- 10 runs / seed = none --------------------------------------');
isaac.reset();
for(var i = 0; i <= 10; i++) {
isaac.internals.echo();
isaac.prng();
}
writeln('--- reference --------------------------------------------------');
writeln('a: 0xd4d3f473, b: 0x902c0691, c: 0x0000000a');
writeln('cf. http://www.burtleburtle.net/bob/rand/isaac.html#ISAAC');
writeln('----------------------------------------------------------------' + '\n');
/* --- test 2 --- */
writeln('--- test 2: randvect -------------------------------------------');
writeln('--- 2 runs / seed = default ------------------------------------');
isaac.reset();
isaac.seed(true);
for(var j = 0; j < 2; j++) {
isaac.prng();
isaac.internals.echor();
}
writeln('--- reference --------------------------------------------------');
writeln('cf. http://burtleburtle.net/bob/rand/randvect.txt');
writeln('----------------------------------------------------------------' + '\n');
/* --- test 3 --- */
var s = 'This is <i>not</i> the right mytext.'
writeln('--- test 3: randseed -------------------------------------------');
writeln('--- 10 runs / seed = \'' + s + '\' ----');
isaac.reset();
isaac.seed(s);
for(var j = 0; j < 10; j++) {
for(var i = 0; i < 256; i++) {
write(isaac.rand().toHex(8));
if((i & 7) == 7) writeln('');
}
}
writeln('--- reference --------------------------------------------------');
writeln('cf. http://burtleburtle.net/bob/rand/randseed.txt');
writeln('----------------------------------------------------------------' + '\n');
/* --- test 4 --- */
writeln('--- test 4: benchmark ------------------------------------------');
writeln('--- 100.000 runs -----------------------------------------------');
function benchmark(name, func) {
var ite = 100000;
var start, elapsed;
start = new Date();
for(var i = 0; i <= ite; ++i)
func();
elapsed = new Date() - start;
writeln(name + ': ' + elapsed + ' ms');
}
benchmark('ISAAC ', isaac.rand);
writeln('--- other prng tests -------------------------------------------');
writeln('cf. http://baagoe.com/en/RandomMusings/javascript/time.xhtml');
writeln('----------------------------------------------------------------' + '\n');
};
</script>
</body>
</html>