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Member "Atom/resources/app/apm/node_modules/es5-ext/math/_unpack-ieee754.js" (8 Mar 2017, 832 Bytes) of archive /windows/misc/atom-windows.zip:


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    1 // Credit: https://github.com/paulmillr/es6-shim/
    2 
    3 'use strict';
    4 
    5 var pow = Math.pow;
    6 
    7 module.exports = function (bytes, ebits, fbits) {
    8     // Bytes to bits
    9     var bits = [], i, j, b, str,
   10     bias, s, e, f;
   11 
   12     for (i = bytes.length; i; i -= 1) {
   13         b = bytes[i - 1];
   14         for (j = 8; j; j -= 1) {
   15             bits.push(b % 2 ? 1 : 0);
   16             b = b >> 1;
   17         }
   18     }
   19     bits.reverse();
   20     str = bits.join('');
   21 
   22     // Unpack sign, exponent, fraction
   23     bias = (1 << (ebits - 1)) - 1;
   24     s = parseInt(str.substring(0, 1), 2) ? -1 : 1;
   25     e = parseInt(str.substring(1, 1 + ebits), 2);
   26     f = parseInt(str.substring(1 + ebits), 2);
   27 
   28     // Produce number
   29     if (e === (1 << ebits) - 1) return f !== 0 ? NaN : s * Infinity;
   30     if (e > 0) return s * pow(2, e - bias) * (1 + f / pow(2, fbits));
   31     if (f !== 0) return s * pow(2, -(bias - 1)) * (f / pow(2, fbits));
   32     return s < 0 ? -0 : 0;
   33 };