tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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doMath.js (1335B)

      1 function map_test(t, cases)
      2 {
      3  for (var i = 0; i < cases.length; i++) {
      4    function c() { return t(cases[i].input); }
      5    var expected = cases[i].expected;
      6    assertEq(c(), expected);
      7  }
      8 }
      9 
     10 function lsh_inner(n)
     11 {
     12  var r;
     13  for (var i = 0; i < 35; i++)
     14    r = 0x1 << n;
     15  return r;
     16 }
     17 map_test (lsh_inner,
     18          [{input: 15, expected: 32768},
     19           {input: 55, expected: 8388608},
     20           {input: 1,  expected: 2},
     21           {input: 0,  expected: 1}]);
     22 
     23 function rsh_inner(n)
     24 {
     25  var r;
     26  for (var i = 0; i < 35; i++)
     27    r = 0x11010101 >> n;
     28  return r;
     29 }
     30 map_test (rsh_inner,
     31          [{input: 8,  expected: 1114369},
     32           {input: 5,  expected: 8914952},
     33           {input: 35, expected: 35659808},
     34           {input: -1, expected: 0}]);
     35 
     36 function ursh_inner(n)
     37 {
     38  var r;
     39  for (var i = 0; i < 35; i++)
     40    r = -55 >>> n;
     41  return r;
     42 }
     43 map_test (ursh_inner,
     44          [{input: 8,  expected: 16777215},
     45           {input: 33, expected: 2147483620},
     46           {input: 0,  expected: 4294967241},
     47           {input: 1,  expected: 2147483620}]);
     48 
     49 function doMath_inner(cos)
     50 {
     51    var s = 0;
     52    var sin = Math.sin;
     53    for (var i = 0; i < 200; i++)
     54        s = -Math.pow(sin(i) + cos(i * 0.75), 4);
     55    return s;
     56 }
     57 function doMath() {
     58  return doMath_inner(Math.cos);
     59 }
     60 assertEq(doMath(), -0.5405549555611059);