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node_modules/es5-ext/math/_unpack-ieee754.js

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+/* eslint no-bitwise: "off" */
+// Credit: https://github.com/paulmillr/es6-shim/
+
+"use strict";
+
+var pow = Math.pow;
+
+module.exports = function (bytes, ebits, fbits) {
+	// Bytes to bits
+	var bits = [], i, j, bit, str, bias, sign, e, fraction;
+
+	for (i = bytes.length; i; i -= 1) {
+		bit = bytes[i - 1];
+		for (j = 8; j; j -= 1) {
+			bits.push(bit % 2 ? 1 : 0);
+			bit >>= 1;
+		}
+	}
+	bits.reverse();
+	str = bits.join("");
+
+	// Unpack sign, exponent, fraction
+	bias = (1 << (ebits - 1)) - 1;
+	sign = parseInt(str.substring(0, 1), 2) ? -1 : 1;
+	e = parseInt(str.substring(1, 1 + ebits), 2);
+	fraction = parseInt(str.substring(1 + ebits), 2);
+
+	// Produce number
+	if (e === (1 << ebits) - 1) return fraction === 0 ? sign * Infinity : NaN;
+	if (e > 0) return sign * pow(2, e - bias) * (1 + fraction / pow(2, fbits));
+	if (fraction !== 0) return sign * pow(2, -(bias - 1)) * (fraction / pow(2, fbits));
+	return sign < 0 ? -0 : 0;
+};